CN215446475U - Dry type waste incineration treatment system - Google Patents

Abstract

Translated fromChinese

本实用新型提供了一种干式垃圾焚烧处理系统，包括第一焚烧炉、第二焚烧炉、气体压缩机、换热器、脱硫反应塔、旋风分离器、脱硝反应塔、布袋除尘器和烟囱：第一焚烧炉侧壁设置有夹层，夹层外侧与所述气体压缩机连通，与第一焚烧炉内部连通，第一焚烧炉内下部设置燃烧器，底部设置排渣口；第二焚烧炉侧部第一进烟口与第一焚烧炉的第一排烟口连通，第二排烟口与换热器输入口连通，第二焚烧炉内部设置有燃烧室，燃烧室外环设的混合室有喷出装置，第二焚烧炉的烟气通过换热器、脱硫反应塔、旋风分离器、脱硝反应塔、布袋除尘器反应净化，通过烟囱排出，该实用新型能够使干式垃圾燃烧充分，有效减少烟气中有害成分的排放。

The utility model provides a dry waste incineration treatment system, comprising a first incinerator, a second incinerator, a gas compressor, a heat exchanger, a desulfurization reaction tower, a cyclone separator, a denitration reaction tower, a bag filter and a chimney : the side wall of the first incinerator is provided with an interlayer, the outer side of the interlayer is communicated with the gas compressor, and is communicated with the inside of the first incinerator, the lower part of the first incinerator is provided with a burner, and the bottom is provided with a slag outlet; the second incinerator side The first smoke inlet is communicated with the first smoke outlet of the first incinerator, the second smoke outlet is communicated with the input port of the heat exchanger, a combustion chamber is arranged inside the second incinerator, and a mixing chamber is arranged outside the combustion chamber. There is an ejection device, and the flue gas of the second incinerator is reacted and purified by a heat exchanger, a desulfurization reaction tower, a cyclone separator, a denitration reaction tower, and a bag filter, and is discharged through a chimney. The utility model can fully burn dry waste, Effectively reduce the emission of harmful components in flue gas.

Description

Dry type waste incineration treatment system

Technical Field

The utility model relates to the technical field of environmental protection, in particular to a dry type waste incineration treatment system.

Background

In order to realize the aims of harmlessness, reduction and recycling of garbage, a part of cities have been provided with respective urban garbage classification systems. The purpose of garbage classification is to facilitate the disposal of garbage, and therefore, how to dispose of the garbage is a key step for realizing effective environmental management.

The general garbage is divided into recoverable garbage, harmful garbage, dry garbage and wet garbage, wherein the most common treatment modes of the dry garbage treatment are landfill treatment and incineration treatment, but the landfill treatment method has slow effect and wide occupied area and is easy to generate secondary pollution to underground water; the incineration treatment has the advantages of small occupied area, obvious reduction, capability of recovering heat energy therein for power generation and the like, so that the incineration treatment is widely popularized and applied.

In the prior art, the burnt flue gas of dry type garbage contains a large amount of toxic gas and unburned gas, wherein the toxic gas and the unburned gas have great harm to fly ash and dioxin, the typical treatment method at present is to bury the solidified cement or melt the cement at high temperature, but the solidified cement increases the solidified volume, the specific salt in the flue gas can cause solidification and cracking, the fly ash treated by the high-temperature melting method consumes great energy, some systems need to be quenched, the subsequent treatment needs to be preheated and heated, the system is complex, and the cost of one-time investment and operation maintenance is high.

In view of this, the dry type waste incineration treatment system provided by the utility model can fully combust dry type waste and effectively reduce the emission of harmful components in smoke.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a dry type waste incineration system, so as to solve the above technical problems.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a dry-type waste incineration processing system, includes that first burning furnace, second burn burning furnace, gas compressor, heat exchanger, desulfurization reaction tower, cyclone, denitration reaction tower, sack cleaner and chimney: the top of the first incinerator is provided with a garbage inlet and a first smoke exhaust port, the side wall of the first incinerator is provided with an interlayer, the outer side of the interlayer is communicated with the gas compressor, the inner side of the interlayer is communicated with the inside of the first incinerator, the lower part of the inside of the first incinerator is provided with a combustor, and the bottom of the first incinerator is provided with a slag exhaust port; a first smoke inlet is formed in the side part of the second incinerator, the first smoke inlet is communicated with the first smoke outlet, a second smoke outlet is formed in the top of the second incinerator, the second smoke outlet is communicated with the input port of the heat exchanger, a combustion chamber is formed in the second incinerator, a mixing chamber is arranged outside the combustion chamber in an annular mode, a spraying device is arranged in the mixing chamber, a plurality of nozzles are arranged on the spraying device in an upward or downward spaced mode, and an ash discharge port is formed in the bottom of the second incinerator; the utility model discloses a denitration reaction tower, including desulfurization reaction tower, cyclone, flue-dust remover, flue gas outlet, flue gas inlet, dust outlet, heat exchanger delivery outlet, desulfurization reaction tower bottom sets up the second and advances the mouth, the second advance the mouth with heat exchanger delivery outlet intercommunication, desulfurization reaction tower top is provided with the third exhaust port, the third exhaust port with cyclone flue gas inlet intercommunication, desulfurization reaction tower downside is provided with the feed inlet, the feed inlet with cyclone's flying dust export intercommunication, cyclone flue gas outlet with the flue intercommunication on denitration reaction tower upper portion, denitration reaction tower lower part outlet with the flue gas inlet intercommunication of bag dust remover, the outlet of flue gas of bag dust remover with chimney intercommunication, the dust export with first mouth intercommunication that advances.

This set up two-stage combustion and make dry-type garbage combustion more abundant, first burning furnace fills into oxygen-containing gas in to the stove through the intermediate layer, can be more set up gas passage, help dry-type rubbish and oxygen fully to contact, the second burns burning furnace further burning to the flue gas that produces, effectively get rid of the gas that is not burnt in the flue gas, and the material of jetter spun can be got rid of harmful substance such as dioxin effectively, pass through the desulfurization again, denitration and dust removal treatment, make the flue gas after the purification reduce atmospheric pollution.

Further, the lateral wall of intermediate layer is provided with first air inlet, first air inlet with gas compressor intercommunication, the inside wall from the top down of intermediate layer is provided with a plurality of first air vents, first air vent intercommunication inside the first burning furnace.

The plurality of vent holes can be in contact with dry type garbage at different parts of the first incinerator for combustion is more sufficient, and the temperature of the incinerator wall can be reduced due to the arrangement of interlayer charging gas.

Furthermore, a stirring shaft is arranged in the first incinerator, a first combustor is arranged at the lower part of the first incinerator, the upper part of the stirring shaft penetrates through the top of the first incinerator and is connected with a driving motor, the lower part of the stirring shaft extends towards the first combustor, and a spiral blade is arranged on the stirring shaft.

The (mixing) shaft plays the stirring dispersion effect to dry-type rubbish, and helical blade sets up can play the transport effect to dry-type rubbish, avoids piling up, can also play the preheating action to dry-type rubbish.

Further, an air passage is axially arranged in the middle of the stirring shaft, the air passage is communicated with a gas compressor through the end part of the stirring shaft, and a plurality of second ventilation holes communicated with the air passage are formed in the circumferential surface of the stirring shaft.

The arrangement of the air flue reduces the temperature of the stirring shaft and further increases the contact area of the oxygen-containing gas and the dry garbage.

Further, the inside combustion chamber that sets up of second incinerator, the combustion chamber outside encircles and is equipped with the mixing chamber, the combustion chamber lower part with the mixing chamber intercommunication, the combustion chamber top is provided with stores up the smoke chamber, the combustion chamber bottom is provided with the ash discharging room, store up the smoke chamber with the mixing chamber intercommunication, the ash discharging room with the mixing chamber intercommunication.

The mixing chamber can effectively remove harmful substances in the flue gas, avoids regenerating along with temperature change in the subsequent process, and can play a heat preservation role in the combustion chamber, thereby reducing energy consumption.

Further, store up the smoke chamber with be provided with first baffle between the mixing chamber, arrange the ash chamber with set up the second baffle between the mixing chamber, first baffle with combustion chamber upper portion fixed connection, the second baffle with combustion chamber lower part fixed connection, first baffle with the second baffle is the filter screen plate structure.

The arrangement of the first partition plate and the second partition plate plays a role in fixing and supporting the combustion chamber and can adhere particles in larger soot.

Further, a spraying device is annularly arranged in the mixing chamber, a plurality of first nozzles are arranged on the spraying device at intervals upwards, and the spraying device is filled with a mixture of activated alumina powder and air and is sprayed out through the first nozzles. The activated alumina powder is upwards sprayed under the drive of air flow and is fully mixed with the flue gas, thereby being beneficial to adsorbing a small amount of dioxin which is re-synthesized after the temperature is reduced in the follow-up process.

Further, a spraying device is annularly arranged in the mixing chamber, a plurality of second nozzles are arranged on the spraying device at intervals downwards, and the spraying device is filled with a mixed liquid of aluminum hydroxide and water and sprayed out through the second nozzles. The aluminum hydroxide is sprayed downwards under the drive of water flow and is fully mixed with the high-temperature flue gas, and the aluminum hydroxide is decomposed into active aluminum oxide powder and is discharged along with the flue gas, so that the subsequent adsorption of a small amount of dioxin re-synthesized by temperature reduction is facilitated.

Further, a second combustor is fixedly arranged at the upper part of the combustion chamber, the second combustor is provided with a venturi structure, and the second combustor is communicated with the gas compressor through a second gas inlet arranged at the upper part of the second incinerator.

The device can be beneficial to the mixing of the flue gas, the combustion-supporting substances and the oxygen-containing gas, so that the combustion is more sufficient.

Furthermore, a plurality of catalytic layers are obliquely arranged in the denitration reaction tower, and the included angle between each catalytic layer and the horizontal plane is 0-60 degrees. The arrangement increases the contact area of the catalyst layer and the ammonia nitrogen mixture, so that the reaction is more sufficient.

Compared with the prior art, the dry type waste incineration treatment system has the following advantages that:

(1) according to the dry type garbage incineration treatment system, the first incinerator adopts a spiral conveying structure, the dry type garbage is uniformly conveyed, the dry type garbage is reduced to be accumulated in the incinerator, the stirring and evacuation effects are achieved, the stirring shaft is provided with the plurality of air holes, the wall of the incinerator is provided with the plurality of air holes through the interlayer, the contact between the dry type garbage and air is increased, and the dry type garbage is combusted more fully;

(2) according to the dry type waste incineration treatment system, the second incinerator is used for carrying out secondary combustion on the flue gas, so that the gas which is not completely combusted is fully combusted, the spraying device is annularly arranged outside the combustion chamber and can spray out substances capable of adsorbing dioxin, the substances can be mixed with the flue gas to adsorb and remove the dioxin when the temperature is reduced and the dioxin is synthesized again, and the mixing chamber on the outer side can play a heat preservation role in the combustion chamber and reduce heat loss;

(3) the dry type waste incineration treatment system can effectively remove acid gas and nitrogen oxides, effectively reduce pollution to the atmosphere, and avoid excessive energy loss because the combustion temperature of the system is lower than that of high-temperature melting combustion.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of a dry refuse incineration system according to the present invention;

FIG. 2 is a schematic view of a primary incinerator according to a first embodiment of the present invention;

FIG. 3 is an enlarged view of the utility model taken at M in FIG. 2;

FIG. 4 is an enlarged view taken at N of FIG. 2 according to the present invention;

FIG. 5 is a schematic structural view of a secondary incinerator according to a first embodiment of the present invention;

figure 6 is a schematic view of a blowing device according to a first embodiment of the utility model;

FIG. 7 is a schematic structural diagram of a denitration reaction tower according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a secondary incinerator according to a second embodiment of the present invention.

Description of reference numerals:

1. a first incinerator; 101. a waste inlet; 102. a drive motor; 103. a first exhaust port; 104. a first air inlet; 105. a slag discharge port; 106. a first inlet; 107. a stirring shaft; 108. a helical blade; 109. a first burner; 110. a furnace bottom; 111. a grate; 112. a furnace body; 113. a furnace cover; 114. an interlayer; 115. a first vent hole; 116. an airway; 117. a second vent hole; 2. a gas compressor; 3. a second incinerator; 301. a second inlet; 302. a second smoke exhaust port; 303. a second air inlet; 304. a first smoke inlet; 305. an ash discharge port; 306. a first separator; 307. a second separator; 308. a top wall; 309. an outer wall; 310. a bottom wall; 311. a tobacco storage chamber; 312. a mixing chamber; 313. an ash discharge chamber; 314. an inner wall; 315. a discharge device; 316. a channel; 317. a combustion chamber; 318. a second combustor; 319. a venturi structure; 320. a second nozzle; 321. a first nozzle; 322. a circumferential conduit; 323. a radial conduit; 324. a spray inlet; 4. a first induced draft fan; 5. a heat exchanger; 6. a desulfurization reaction tower; 601. a third smoke exhaust port; 602. a feed inlet; 603. a second smoke inlet; 7. a cyclone separator; 8. a dust collector; 9. a denitration reaction tower; 901. a flue; 902. a fourth smoke exhaust port; 903. an ammonia injection device; 904. a mixer; 905. a third smoke inlet; 906. a rectifier; 907. a baffle; 908. a catalytic layer; 909. a reaction layer; 10. a ceramic fiber dust collector; 11. a chimney; 12. a second induced draft fan; 13. a third induced draft fan; 14. and a fourth induced draft fan.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The descriptions of "first," "second," "upper," "lower," "inner," "outer," and the like in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. Thus, the definition of "first" and "second" features may explicitly or implicitly include at least one such feature, with "up" and "down" orientations being relative to the actual placement, "inner" referring to a direction toward the annular center of the respective component, and "outer" referring to a direction away from the annular center of the respective component. In addition, the technical solutions in the embodiments may be combined with each other, but it is necessary that a person skilled in the art can realize the combination, and the technical solutions in the embodiments are within the protection scope of the present invention.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, a dry type waste incineration treatment system includes a first incinerator 1, asecond incinerator 3, a gas compressor 2, aheat exchanger 5, adesulfurization reaction tower 6, a cyclone separator 7, a denitration reaction tower 9, a ceramic fiber dust collector 10, and a chimney 11:

the smoke outlet at the top of the first incinerator 1 is communicated with the smoke inlet at the upper part of the second incinerator 3, the second incinerator 3 carries out secondary combustion on smoke after dry garbage combustion to reduce harmful substances, the smoke outlet at the top of the second incinerator 3 is communicated with the smoke inlet at the bottom of the desulfurization reaction tower 6 through a heat exchanger 5, the heat exchanger 5 cools the smoke discharged by the second incinerator 3 to a temperature suitable for desulfurization reaction, the smoke outlet at the top of the desulfurization reaction tower 6 is communicated with the smoke inlet at the upper part of the denitration reaction tower 9 through a cyclone separator 7, the smoke outlet at the bottom of the denitration reaction tower 9 is communicated with a chimney 11 through a ceramic fiber dust remover 10, and sulfur-containing gas, acidic gas and nitrogen oxides in the smoke are fully absorbed to reduce pollution to the atmosphere; the first incinerator 1 and the second incinerator 3 are also communicated with a gas compressor 2 to introduce combustion air to ensure full combustion, the cyclone separator 7 is communicated with a feed inlet at the lower part of the desulfurization reaction tower 6 to ensure that desulfurization reactants can be recycled, the ceramic fiber dust remover 10 is communicated with a smoke inlet of the second incinerator 3 to re-combust collected fly ash, and further prevent a small amount of dioxin and other harmful substances from being discharged;

the first incinerator 1 and thesecond incinerator 3 are communicated with afourth draught fan 14, thesecond incinerator 3 and theheat exchanger 5 are communicated with a first draught fan 4, the denitration reaction tower 9 and the ceramic fiber dust remover 10 are communicated with athird draught fan 13, the ceramic fiber dust remover 10 and the chimney 11 are communicated with asecond draught fan 12, and smoke is timely and smoothly introduced into a next component due to arrangement of the draught fans.

Specifically, as shown in fig. 1 to 4, the first incinerator 1 includes a furnace cover 113, a furnace body 112 and a furnace bottom 110, which are respectively disposed at the top, middle and bottom of the first incinerator 1, the furnace cover 113 is fastened at the top of the furnace body 112 and is an arc cover, the furnace bottom 110 is fixedly disposed at the bottom of the furnace body 112 and is cone-shaped, a fire grate 111 is disposed at a connection position between the inside of the furnace body 112 and the furnace bottom 110, the fire grate 111 can penetrate burnt ash into the furnace bottom 110, a first burner 109 is fixedly disposed at the middle of the fire grate 111, a garbage inlet 101 and a first smoke outlet 103 are disposed at the top of the furnace cover 113, an interlayer 114 is disposed on a side wall of the furnace body 112, a first air inlet 104 is disposed on an outer side wall of the interlayer 114, the first air inlet 104 is communicated with the gas compressor 2 for introducing oxygen-containing gas, a plurality of first vent holes 115 are disposed from top to bottom on an inner side wall of the interlayer 114, the first vent holes 115 are communicated with the inside of the first incinerator 1, the stirring shaft 107 is arranged in the furnace body 112 of the first incinerator 1, the upper part of the stirring shaft 107 penetrates through the furnace cover 113 to be connected with the driving motor 102, the lower part of the stirring shaft 107 extends towards the first combustor 109, the spiral blade 108 is arranged on the stirring shaft 107, the spiral blade 108 is arranged below the garbage inlet 101, dry garbage can fall on the spiral blade 108 after being thrown in from the garbage inlet 101, the spiral blade 108 can disperse and convey the dry garbage to avoid excessive accumulation, and can play a role of stirring in the first incinerator 1 during the incineration process, the middle part of the stirring shaft 107 is axially provided with an air passage 116, the air passage 116 is communicated with the gas compressor 2 through the end part of the stirring shaft 107, the circumferential surface of the stirring shaft 107 is provided with a plurality of second ventilation holes 117 communicated with the air passage 116, the axis of the second ventilation holes 117 is obliquely arranged downwards, and forms an included angle of 0-90 degrees with the axis of the stirring shaft 107, and the arrangement of the second ventilation holes 117 can avoid being blocked by garbage, make and ventilate smoothly, the setting of first venthole 115 and second venthole 117 can be filled into oxygen-containing gas in a plurality of directions to the furnace, it is abundant with rubbish mixture, help rubbish fully to burn, air flue 116 can also play the air cooling effect to (mixing) shaft 107 simultaneously, avoid the too high deformation damage of (mixing) shaft temperature, intermediate layer 114 plays the air cooling effect to the lateral wall, avoid the high temperature, the bottom of stove bottom 110 sets up row cinder notch 105, so that the lime-ash is discharged, but recovery processing, stove bottom 110 still is provided with first entry 106, first entry 106 intercommunication first combustor 109, let in combustible gas and burn.

Further, as shown in fig. 1, 5 and 6, the second incinerator 3 includes a top wall 308, an outer wall 309 and a bottom wall 310, the top wall 308 is arc-shaped and disposed on the top of the second incinerator 3, the enclosed space is a smoke storage chamber 311, the outer wall 309 is disposed in the middle of the second incinerator 3, an inner wall 314 is sleeved inside the second incinerator 3, the enclosed space enclosed by the inner wall 314 is a combustion chamber 317, the enclosed space between the outer wall 309 and the inner wall 314 is a mixing chamber 312, the mixing chamber 312 is disposed around the outside of the combustion chamber 317, the bottom wall 310 is cone-shaped and disposed at the bottom of the second incinerator 3, the enclosed space is an ash discharge chamber 313, an ash discharge port 305 is disposed at the bottom of the ash discharge chamber 313 for collecting incinerated particles, a channel 316 is disposed at the lower portion of the combustion chamber 317, the channel 316 is communicated with the mixing chamber 312, a first partition 306 is disposed between the smoke storage chamber 311 and the mixing chamber 312, a second partition 307 is disposed between the ash discharge chamber 313 and the mixing chamber 312, the first partition plate 306 and the second partition plate 307 are of a screen plate structure, the smoke storage chamber 311 is communicated with the mixing chamber 312 through the mesh of the first partition plate 306, the ash discharge chamber 313 is communicated with the mixing chamber 312 through the mesh of the second partition plate 307, the first partition plate 306 is fixedly connected with the upper part of the combustion chamber 317, the second partition plate 307 is fixedly connected with the lower part of the combustion chamber 317, and the upper part and the lower part of the combustion chamber 317 are supported and fixed;

a first smoke inlet 304 is arranged at the side part of the second incinerator 3, one end of the first smoke inlet 304 passes through the outer wall 309 and the upper part of the inner wall 314 and is communicated with the upper part of a combustion chamber 317, the other end of the first smoke inlet 304 is communicated with the first smoke outlet 103 through a fourth induced draft fan 14, the top wall 308 of the second incinerator 3 is provided with a second smoke outlet 302, one end of the second smoke outlet 302 is communicated with a smoke storage chamber 311, the other end of the second smoke outlet 302 is communicated with the input port of the heat exchanger 5 through a first induced draft fan 4, the upper part of the combustion chamber 317 is fixedly provided with a second combustor 318, the second combustor 318 is provided with a Venturi tube structure 319, the top of the second incinerator 3 is provided with a second inlet 301, the second inlet 301 passes through the top wall 308, the smoke storage chamber 311 is communicated with the second combustor 318 and is filled with combustible substances, the upper part of the second incinerator 3 is provided with a second air inlet 303, one end of the second air inlet 303 is communicated with the gas compressor 2, and the other end of the second combustor 318 passes through the outer wall 309 and the inner wall 314 and is communicated with the second combustor 318, the spraying device 315 is arranged in the mixing chamber 312, the spraying device 315 is annularly arranged and comprises a circumferential pipeline 322 and a radial pipeline 323, the radial pipeline 323 is communicated with the circumferential pipeline 322, the circumferential pipeline 322 and/or the radial pipeline 323 are/is provided with a plurality of first nozzles 321 at intervals upwards, one radial pipeline 323 penetrates through the outer wall 309 to be provided with a spraying inlet 324, the activated alumina powder and air are mixed and filled in the spraying inlet 324 and are filled along the circumferential pipeline 322 and the radial pipeline 323, the activated alumina powder and the air are sprayed upwards from the first nozzles 321, the sprayed activated alumina powder and the flue gas are mixed and move towards the flue, and when the temperature of the subsequent flue gas is reduced, the activated alumina powder adsorbs a small amount of resynthesized dioxin;

the flue gas discharged from the first incinerator 1 enters the combustion chamber 317 from the first flue gas inlet 304 to be combusted again, unburned gases such as carbon monoxide and the like are fully combusted, the temperature of the combustion chamber 317 reaches 850-1200 ℃, dioxin is fully decomposed, the combusted flue gas enters the mixing chamber 312 through the channel 316, the combustion chamber 317 and the mixing chamber 312 are respectively arranged to enable the flue gas to have enough combustion time in the combustion chamber 317, the unburned gases are more thoroughly combusted, the dioxin is more thoroughly decomposed, the stroke of the flue gas is increased in the mixing chamber 312, activated alumina powder sprayed by the spraying device 315 can be fully mixed with the flue gas, so that the adsorption of subsequent harmful substances is facilitated, the mixing chamber 312 can also have a heat preservation effect on the combustion chamber 317 and reduce energy consumption, the arrangement of the second combustor 318 can enable combustible substances to be fully mixed with oxygen-containing gas, and a spraying and mixing effect is realized at the outlet of the combustor, the mixed combustion with the smoke entering from the first smoke inlet 304 is facilitated; compared with the activated carbon which adsorbs harmful substances below 200 ℃, the activated alumina can effectively adsorb dioxin at higher temperature and can adsorb substances such as heavy metals and the like, thereby playing the role of purifying flue gas and avoiding greatly cooling the whole system.

Thedesulfurization reaction tower 6 adopts a dry circulating fluidized bed desulfurization process, the top of thedesulfurization reaction tower 6 is provided with athird smoke outlet 601, thethird smoke outlet 601 is communicated with the input end of a cyclone separator 7, the bottom of the desulfurization reaction tower is provided with asecond smoke inlet 603, thesecond smoke inlet 603 is communicated with aheat exchanger 5, the lower side of the desulfurization reaction tower is provided with afeed inlet 602, thefeed inlet 602 is filled with slaked lime powder and air mixture, a spraying device is arranged in thedesulfurization reaction tower 6 to spray slaked lime powder under the action of air flow, the slaked lime powder and sulfur-containing gas in flue gas are filled into thesecond smoke inlet 603 to carry out desulfurization reaction, the fly ash formed after desulfurization enters the cyclone separator 7 for separation, the separated flue gas enters a denitration reaction tower 9 through a flue gas outlet of the cyclone separator 7, the separated fly ash enters a dust collector 8 through a fly ash outlet of the cyclone separator 7, and the dust collector 8 is communicated with thefeed inlet 602, and (3) introducing the fly ash containing the slaked lime into adesulfurization reaction tower 6 for circulating desulfurization.

Further, as shown in fig. 1 and 7, a flue 901 is arranged at the upper part of the denitration reaction tower 9, a third flue inlet 905 is arranged at the bottom of the flue 901, the third flue inlet 905 is communicated with the flue 901 between the denitration reaction tower 9, an ammonia spraying device 903, a mixer 904, a deflector 907 and a rectifier 906 are sequentially arranged inside the flue 901, so that ammonia and nitrogen are uniformly mixed, a plurality of catalytic layers 908 are obliquely arranged in the denitration reaction tower 9 at intervals, reaction layers 909 are arranged between the catalytic layers 908, an included angle between the catalytic layer 908 and the horizontal plane is 0-60 degrees, the contact area between the catalytic layer 908 and the mixed flue gas can be increased, so that the catalytic effect is better, in addition, the catalytic layers 908 are obliquely arranged, so that the catalyst can be conveniently filled into the denitration reaction tower 9, the catalyst can be conveniently discharged out of the denitration reaction tower 9 after losing activity, and replaced, a filling inlet can be arranged at the upper part of the catalytic layer 908, and a catalyst outlet is arranged at the lower part of the catalytic layer 908, the catalyst is discharged from the bottom, and is filled from a filling inlet, so that the process is convenient and fast, a fourth exhaust port 902 is arranged at the bottom of the denitration reaction tower 9, the fourth exhaust port 902 is communicated with a flue gas inlet of the ceramic fiber dust collector 10 through a third induced draft fan 13, fly ash and a small amount of dioxin in flue gas are further removed, a flue gas outlet of the ceramic fiber dust collector 10 is communicated with a chimney 11 through a second induced draft fan 12, the treated flue gas is discharged through the chimney 11, a dust collection outlet of the ceramic fiber dust collector 10 is communicated with the first exhaust port 304 through a fourth induced draft fan 14, the fly ash is further combusted to remove residual harmful substances, the ceramic fiber dust collector 10 is high-temperature resistant, the flue gas does not need to be further cooled, and the effect of reducing energy consumption is achieved.

The specific dry type garbage incineration process comprises the following steps: the combustion-supporting material A is introduced into a first inlet 106 of a first incinerator 1, oxygen-containing gas is introduced into a first air inlet 104, a first combustor 109 is ignited for combustion to preheat the first incinerator 1, the temperature reaches 600-800 ℃, the combustion-supporting material A is introduced into a second inlet 301 of a second incinerator 3, oxygen-containing gas is introduced into a second air inlet 303, a second combustor 318 is ignited for preheating the second incinerator 3, the temperature reaches 850-1200 ℃, dry-type garbage F is thrown into the first incinerator 1 through a garbage inlet 101, a stirring shaft 107 rotates under the action of a driving motor 102, oxygen-containing gas is introduced into an air passage 116, the temperature in the incinerator is kept to enable the dry-type garbage to be fully combusted, generated slag ash F is collected in a furnace bottom 110 and discharged and collected through a slag discharge port 105, flue gas is discharged from a first smoke discharge port 103, enters a first smoke inlet 304 under the action of a fourth draught fan 14 and is introduced into a combustion chamber 317 for combustion, oxygen in the oxygen-containing gas reacts with unburned gases such as carbon monoxide again, the combusted flue gas enters the mixing chamber 312 through the channel 316, the flue gas is fully mixed with the active alumina powder sprayed by the spraying device 315, the larger fly ash particles D fall into the ash discharging chamber 313 and are discharged through the ash discharging port 305, and the flue gas enters the smoke storage chamber 311 after being adsorbed and is discharged through the second smoke discharging port 302; because the melting point of the activated alumina is 2050 ℃ and is higher than the temperature of the combustion chamber 317, the activated alumina can keep the state unchanged after being mixed with the discharged flue gas, and has good adsorption performance, after the combustion of the first incinerator 1 and the second incinerator 3 is stable, the introduction of combustion-supporting substances can be stopped, and only oxygen-containing gas is introduced, wherein the oxygen-containing gas is either air or oxygen or mixed gas of oxygen and other gases;

the flue gas discharged from thesecond smoke outlet 302 enters aheat exchanger 5 through a first induced draft fan 4 for heat exchange, the temperature is reduced to 350-450 ℃, the exchanged heat can be collected for heat supply and the like, a small amount of dioxin is generated when the temperature is reduced, the dioxin is adsorbed under the action of activated alumina powder mixed in the flue gas, the flue gas cooled by theheat exchanger 5 enters adesulfurization reaction tower 6 through asecond smoke inlet 603 at the bottom and reacts with slaked lime powder B introduced from afeed inlet 602, sulfur-containing gas such as SO2 and acidic gas such as HCl react with the slaked lime powder B to generate particles, the flue gas enters a cyclone separator 7 through athird smoke outlet 601 for separation, the separated fly ash enters a dust collector 8, unreacted slaked lime powder is contained in the flue gas, the flue gas can be introduced into thefeed inlet 602 for cyclic desulfurization, and the separated flue gas enters a denitration reaction tower 9;

flue gas temperature drops little after desulfurization reaction, still keep between 300 ~ 450 ℃, enter into denitration reaction tower 9 through the third and carry out denitration treatment inmouth 905, this temperature can make the ammonia nitrogen react fully under the catalytic action, effectively get rid of nitrogen oxide, the flue gas is after denitration reaction, get into ceramic fiber dust remover 10 under the effect ofthird draught fan 13 and further get rid of tiny fly ash etc. purify flue gas E and get into 11 discharges of chimney throughsecond draught fan 12, this system can make the abundant burning of dry-type rubbish, purify effectively, greatly reduced is to the pollution of air.

Second embodiment, as shown in fig. 1 and 8, based on the modification of the first embodiment, in the first embodiment, thespraying device 315 is filled with air and activated alumina powder, and the powder is easy to accumulate and block thespraying device 315, so thespraying device 315 is arranged in the mixingchamber 312 in an annular shape, thespraying device 315 is provided with a plurality of second sprayingports 320 at intervals downward, thespraying device 315 is arranged in the same manner as the first embodiment, the mixed liquid of aluminum hydroxide and water is sprayed by thespraying device 315, the aluminum hydroxide is decomposed by heat to form activated alumina, the activated alumina and the flue gas are mixed and enter the flue, a small amount of resynthesized dioxin is adsorbed after subsequent temperature reduction, meanwhile, the activated alumina can also adsorb harmful substances such as heavy metals, the activated alumina can also adsorb water vapor, and the flue gas is dried, and the other embodiments are the same as the first embodiment.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims (10)

1. A dry type waste incineration treatment system is characterized in that: the device comprises a first incinerator, a second incinerator, a gas compressor, a heat exchanger, a desulfurization reaction tower, a cyclone separator, a denitration reaction tower, a bag-type dust remover and a chimney, wherein a garbage inlet and a first smoke exhaust outlet are formed in the top of the first incinerator, an interlayer is arranged on the side wall of the first incinerator, the outer side of the interlayer is communicated with the gas compressor, the inner side of the interlayer is communicated with the inside of the first incinerator, a combustor is arranged at the lower part in the first incinerator, and a slag discharge outlet is formed in the bottom of the first incinerator; a first smoke inlet is formed in the side part of the second incinerator, the first smoke inlet is communicated with the first smoke outlet, a second smoke outlet is formed in the top of the second incinerator, the second smoke outlet is communicated with the input port of the heat exchanger, a combustion chamber is formed in the second incinerator, a mixing chamber is arranged outside the combustion chamber in an annular mode, a spraying device is arranged in the mixing chamber, a plurality of nozzles are arranged on the spraying device in an upward or downward spaced mode, and an ash discharge port is formed in the bottom of the second incinerator; the utility model discloses a denitration reaction tower, including desulfurization reaction tower, cyclone, flue-dust remover, flue gas outlet, flue gas inlet, dust outlet, heat exchanger delivery outlet, desulfurization reaction tower bottom sets up the second and advances the mouth, the second advance the mouth with heat exchanger delivery outlet intercommunication, desulfurization reaction tower top is provided with the third exhaust port, the third exhaust port with cyclone flue gas inlet intercommunication, desulfurization reaction tower downside is provided with the feed inlet, the feed inlet with cyclone's flying dust export intercommunication, cyclone flue gas outlet with the flue intercommunication on denitration reaction tower upper portion, denitration reaction tower lower part outlet with the flue gas inlet intercommunication of bag dust remover, the outlet of flue gas of bag dust remover with chimney intercommunication, the dust export with first mouth intercommunication that advances.

2. The dry refuse incineration system according to claim 1, wherein: the lateral wall of the interlayer is provided with a first air inlet communicated with the gas compressor, a plurality of first air holes are arranged in the inner side wall of the interlayer from top to bottom, and the first air holes are communicated with the inside of the first incinerator.

3. The dry refuse incineration system according to claim 2, wherein: the first incinerator is internally provided with a stirring shaft, the lower part of the first incinerator is provided with a first combustor, the upper part of the stirring shaft penetrates through the top of the first incinerator and is connected with a driving motor, the lower part of the stirring shaft extends towards the first combustor, and the stirring shaft is provided with helical blades.

4. The dry refuse incineration system according to claim 3, wherein: the stirring shaft is characterized in that an air passage is axially arranged in the middle of the stirring shaft, the air passage is communicated with a gas compressor through the end part of the stirring shaft, and a plurality of second ventilation holes communicated with the air passage are formed in the circumferential surface of the stirring shaft.

5. The dry refuse incineration system according to claim 1, wherein: the inside combustion chamber that sets up of second incinerator, the combustion chamber outside encircles and is equipped with the mixing chamber, the combustion chamber lower part with the mixing chamber intercommunication, the combustion chamber top is provided with stores up the smoke chamber, the combustion chamber bottom is provided with the ash discharging room, store up the smoke chamber with the mixing chamber intercommunication, the ash discharging room with the mixing chamber intercommunication.

6. The dry refuse incineration system according to claim 5, wherein: store up the smoke chamber with be provided with first baffle between the mixing chamber, arrange the ash chamber with set up the second baffle between the mixing chamber, first baffle with the second baffle is the filter screen plate structure.

7. The dry refuse incineration system according to claim 5, wherein: the mixing chamber is internally and annularly provided with a spraying device, the spraying device is provided with a plurality of first nozzles at intervals upwards, and the spraying device is filled with a mixture of activated alumina powder and air and is sprayed out through the first nozzles.

8. The dry refuse incineration system according to claim 5, wherein: and the mixing chamber is internally and annularly provided with a spraying device, the spraying device is provided with a plurality of second nozzles at intervals downwards, and the spraying device is filled with a mixed liquid of aluminum hydroxide and water and sprayed out through the second nozzles.

9. The dry refuse incineration system according to claim 5, wherein: and a second combustor is fixedly arranged at the upper part of the combustion chamber, a Venturi tube structure is arranged in the second combustor, and the second combustor is communicated with the gas compressor through a second gas inlet arranged at the upper part of the second incinerator.

10. The dry refuse incineration system according to claim 1, wherein: a plurality of catalytic layers are obliquely arranged in the denitration reaction tower, and the included angle between each catalytic layer and the horizontal plane is 0-60 degrees.

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