CN112973333A - Kitchen waste and waste gas treatment combined device and process thereof - Google Patents

Abstract

The invention discloses a kitchen waste and waste gas treatment combined device and a process thereof, wherein the kitchen waste and waste gas treatment combined device comprises a kitchen transfer station, a primary spray tower, a secondary spray tower, a biological filter, a photocatalyst, an activated carbon absorber, an induced draft fan, a chimney and a tertiary spray tower; the combined treatment process solves the problems of waste gas oil removal, temperature reduction, dust removal, VOCs removal, odor removal and the like, and has the advantages of high waste gas purification efficiency, good deodorization effect, strong impact resistance, stable operation, simple and convenient operation and maintenance, moderate primary investment, low operating cost, no increase of secondary pollution, compact equipment, small occupied area and low energy consumption. Can stably run for a long time and reach the relevant national emission standard. In addition, the process can simplify the process sections according to the requirements of the project by chemical washing absorption, water absorption, microorganism, photocatalysis and activated carbon adsorption, and then combine the process sections into an integrated device, thereby ensuring the purification efficiency, and simultaneously having the advantages of more stable operation, reduced energy consumption, lower investment, compact equipment, small occupied area and the like.

Description

Kitchen waste and waste gas treatment combined device and process thereof

Technical Field

The invention relates to the field of kitchen waste and waste gas treatment, in particular to a kitchen waste and waste gas treatment combined device and a kitchen waste and waste gas treatment process.

Background

Malodorous gas and dust generated by the garbage transfer station are mainly generated in the garbage unloading and compressing process, and atmospheric pollutants are mainly NH₃、H₂S, stink. At present, for the odorous waste gas generated by the garbage transfer station, the treatment technology is in a research and discussion stage, and the treatment method mainly treats the waste gas through a single spraying, activated carbon and microorganism process; each treatment process has the defects of unstable deodorization effect and incapability of achieving ideal effect, and objects filtered in the spraying process of the spraying tower are difficult to remove, so that water flow sprayed subsequently is blocked and a continuous circulating state is difficult to formIn (1).

Disclosure of Invention

Aiming at the problems in the related art, the invention provides a kitchen waste and waste gas treatment combined device and a process thereof, which aim to overcome the technical problems in the prior related art.

The technical scheme of the invention is realized as follows:

a kitchen waste and waste gas treatment combined device comprises a kitchen transfer station, a primary spray tower, a secondary spray tower, a biological filter, a photocatalyst, an activated carbon adsorber, an induced draft fan, a chimney and a tertiary spray tower;

the kitchen cabinet transfer station connects on the one-level spray column, the one-level spray column connects on the second grade spray column, the second grade spray column is connected with the one end of biological filter, the other termination of biological filter is on the photocatalyst apparatus, the other end and the third grade spray column import of photocatalyst apparatus meet, the export of third grade spray column connects on the chimney through active carbon adsorber and draught fan.

The kitchen transfer station further comprises an air pipe, a gas collecting hood, a separating cylinder, a motor and a support frame, wherein the support frame is movably connected with the separating cylinder through a roller, one end of the separating cylinder is connected with a rotating shaft of the motor, the other end of the separating cylinder is connected with a feeding funnel, the gas collecting hood is installed above the separating cylinder, and the gas collecting hood is connected with a primary spray tower through the air pipe;

the kitchen waste gas that feed hopper flowed in falls into the separator drum, the kitchen waste gas of separator drum flows into in the one-level spray column through gas collecting channel and tuber pipe.

Further, the structure of one-level spray tower, second grade spray tower and tertiary spray tower is the same, the one-level spray tower includes the tower body, circulating water tank, add medicine mechanism, spray the mechanism, negative pressure mechanism and clearance mechanism, circulating water tank is located the bottom of tower body, clearance mechanism is located circulating water tank's inside, negative pressure mechanism is located the top of tower body, spray mechanism one end and meet with circulating water tank, the other end that sprays the mechanism is worn out the tower body and is met with medicine mechanism, and spray the mechanism and insert the tower body top again, be located negative pressure mechanism's below, the side import that the top export of one-level spray tower passes through the pipeline and inserts the second grade spray tower.

Further, the negative pressure mechanism comprises a lantern ring, fan blades and a support column, the lantern ring is fixed on the inner wall of the tower body, the support column transversely penetrates through the lantern ring, the fan blades with power drive are installed in the middle of the support column, the fan blades rotate under the power drive, and kitchen waste gas is discharged into the secondary spray tower under the action of negative pressure;

the circulating water tank comprises an expansion part, a water storage container and a filter screen, the top surface of the water storage container is connected with the expansion part, the filter screen is arranged at the joint of the expansion part and the water storage container, two symmetrical ends of the expansion part penetrate out of the tower body and are respectively connected with the spraying mechanism and the rotating motor, the expansion part rotates around the spraying mechanism and the rotating motor, and a cleaning mechanism is arranged on the expansion part above the filter screen;

the cleaning mechanism comprises a motor, a brush and a bearing seat, the bearing seat is fixed on the top surface of the filter screen, a rotating shaft of the motor penetrates through the bearing seat to be connected with the brush, the bottom surface of the brush is contacted with the filter screen, the rotating motor rotates to a position below the filter screen, and the motor drives the brush to rotate so as to clean impurities accumulated on the surface of the filter screen;

the spraying mechanism comprises a switching cylinder, a main pipe, a discharge pipe, a spraying circulating pump, a spray pipe and an atomizing head, the switching cylinder is fixed on the outer wall of the tower body, one end of each of the main pipe and the discharge pipe is inserted into the switching cylinder, the other end of the main pipe is connected with an expanding part above the filter screen, the discharge pipe is connected onto the spraying circulating pump, the output end of the spraying circulating pump is connected with the spray pipe, the spray pipe is inserted into the tower body and is connected with the atomizing head, and liquid in the water storage vessel drawn by the spraying circulating pump is atomized and.

Further, the dosing mechanism comprises a servo motor, a medicine box, a dosing pipe, a sealing disc, a cross rod, a main shaft and a sealing barrel, wherein one end of the main shaft is fixed on the servo motor, the other end of the main shaft is inserted into the cross rod, and the cross rod slides in the main shaft;

the horizontal pole inserts sealed section of thick bamboo and meets with sealed dish, sealed dish and sealed dish threaded connection, and sealed top of a section of thick bamboo is through adding pencil and discharge pipe intercommunication, and sealed section of thick bamboo is fixed on the medical kit to the medical kit communicates with the lateral wall of a sealed section of thick bamboo, moves to discharge pipe and medical kit intercommunication left at sealed dish, and sealed dish cuts off medical kit and discharge pipe right.

The invention also discloses a process of the kitchen waste and waste gas treatment combined device, which comprises the following steps:

s1, collecting waste gas; odorous waste gas generated in the procedure of treatment of the kitchen transfer station is conveyed into the primary spray tower through a gas collecting hood;

s2, spraying acid and alkali liquor for pretreatment: the first-stage spray tower and the second-stage spray tower are continuously contacted with the waste gas through thespray mechanism 24, dust particles, acid and alkaline VOCs molecules are purified and removed, and the temperature of the waste gas is reduced.

S3, degradation: the waste gas after the acid and alkali washing pretreatment is firstly put into a biological filter to wash and remove the residual chemical agent, the PH value is adjusted to be neutral, the waste gas is homogenized and enters a biodegradation section, and the components of the waste gas, such as H2S, NH3 and methyl sulfide, in the waste gas which are easy to be biodegraded are removed.

S4, photocatalysis: after chemical washing and biological purification, the waste gas enters a photocatalytic section, and the trace VOCs which are not treated at the front end are subjected to photocatalytic decomposition, including the photocatalytic decomposition of methyl mercaptan, dimethyl sulfide, aldehydes and esters.

S5, water spraying post-treatment: the third-stage spray tower further absorbs light to carry out photocatalytic decomposition and then subdivides molecules and free oxygen;

s6, dewatering and demisting: the waste gas after water spraying washing and purification contains water mist, and the water mist is removed through the combined filler.

S7, activated carbon adsorption: residual trace VOCs molecules and peculiar smell molecules of the waste gas treated in the previous working section are further removed, and the waste gas is firmly adsorbed on the surface of the active carbon or in the gaps, and has obvious removal effect on humus, synthetic organic matters and low molecular weight organic matters.

S8, discharging: and the treated waste gas reaching the standard is discharged by the induced draft fan through the chimney.

The technical scheme has the following advantages or beneficial effects:

1. the invention provides a kitchen waste and waste gas treatment combined device and a process thereof.A flared part rotates around a spraying mechanism and a rotating motor, a cleaning mechanism is arranged on the flared part above a filter screen, a water storage vessel is used for collecting sprayed liquid, and the filter screen filters settled impurities to avoid subsequent atomization and blockage.

2. The invention provides a kitchen waste and waste gas treatment combined device and a process thereof.A rotating motor rotates until a cleaning mechanism is positioned below a filter screen, a motor drives a brush to rotate for cleaning impurities accumulated on the surface of the filter screen, and after spraying is finished, the rotating motor drives a circulating water tank to rotate for cleaning the impurities on the filter screen, so that the problem of blockage caused by long-time use is avoided.

3. The invention provides a kitchen waste and waste gas treatment combined device and a process thereof.A main pipe is connected with an expanding part above a filter screen at the other end, a discharge pipe is connected with a spray circulating pump, the output end of the spray circulating pump is connected with a spray pipe, the spray pipe is inserted into a tower body and connected with an atomizing head, and the spray circulating pump pumps liquid in a water storage vessel, passes through the spray pipe and is atomized and sprayed by the atomizing head.

4. The invention provides a kitchen waste gas treatment combination device and a process thereof.A sealing disc is fixed on a medicine box, the medicine box is communicated with the side wall of the sealing disc, the sealing disc moves leftwards until a discharge pipe is communicated with the medicine box, the sealing disc separates the medicine box and the discharge pipe rightwards, a main shaft of the sealing disc drives a cross rod to rotate, and the sealing disc rotates and moves leftwards or rightwards along a sealing cylinder, so that the opening and closing states of the medicine box are controlled, and automatic medicine feeding is realized.

The combined treatment process solves the problems of waste gas oil removal, temperature reduction, dust removal, VOCs removal, odor removal and the like, and has the advantages of high waste gas purification efficiency, good deodorization effect, strong impact resistance, stable operation, simple and convenient operation and maintenance, moderate primary investment, low operating cost, no increase of secondary pollution, compact equipment, small occupied area and low energy consumption. Can stably run for a long time and reach the relevant national emission standard.

In addition, the process can simplify the process sections according to the requirements of the project by chemical washing absorption, water absorption, microorganism, photocatalysis and activated carbon adsorption, and then combine the process sections into an integrated device, so that the process has the advantages of more stable operation, reduced energy consumption, lower investment, compact equipment, small occupied area and the like while ensuring the purification efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a structural diagram of a kitchen waste and exhaust gas treatment combined device according to an embodiment of the invention;

FIG. 2 is a partial structure diagram of a kitchen waste and exhaust gas treatment combined device according to an embodiment of the invention;

FIG. 3 is a structural diagram of a circulating water tank of the kitchen waste and waste gas treatment combined device according to the embodiment of the invention;

FIG. 4 is a structural diagram of a circulating water tank and a cleaning mechanism of the kitchen waste and waste gas treatment combined device according to the embodiment of the invention;

FIG. 5 is a sectional view of a circulating water tank and a cleaning mechanism of the kitchen waste and waste gas treatment combined device according to the embodiment of the invention;

FIG. 6 is a structural diagram of a dosing mechanism of the kitchen waste and exhaust gas treatment combined device according to the embodiment of the invention;

FIG. 7 is a sealing disc structure diagram of the kitchen waste and waste gas treatment combined device according to the embodiment of the invention;

fig. 8 is a flow chart of the combined process for treating the waste gas of the kitchen waste according to the embodiment of the invention.

In the figure:

1. a kitchen transfer station; 11. an air duct; 12. a gas-collecting hood; 13. a separation cylinder; 14. a motor; 15. a support frame; 2. a first stage spray tower; 21. a tower body; 22. a circulating water tank; 221. a flared part; 222. a water storage vessel; 223. a filter screen; 23. a dosing mechanism; 231. a servo motor; 232. a medicine chest; 233. a medicine feeding pipe; 234. sealing the disc; 235. a cross bar; 236. a main shaft; 237. a sealing cylinder; 24. a spraying mechanism; 241. a transfer cylinder; 242. a main pipe; 243. a discharge pipe; 244. a spray circulation pump; 245. a nozzle; 246. an atomizing head; 25. a negative pressure mechanism; 251. a collar; 252. a fan blade; 253. a pillar; 26. a cleaning mechanism; 261. a motor; 262. a brush; 263. a bearing seat; 3. a secondary spray tower; 4. a biological filter; 5. a photocatalyst; 6. an activated carbon adsorber; 7. an induced draft fan; 8. a chimney; 9. a third stage spray tower; 10. a rotating electric machine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Referring to the attached drawings 1-8, the kitchen waste and waste gas treatment combination device comprises a kitchen transfer station 1, a primary spray tower 2, a secondary spray tower 3, a biological filter 4, a photocatalyst 5, an activated carbon absorber 6, an induced draft fan 7, a chimney 8 and a tertiary spray tower 9;

the kitchen transfer station 1 is connected on a first-level spray tower 2, the first-level spray tower 2 is connected on a second-level spray tower 3, the second-level spray tower 3 is connected with one end of a biological filter 4, the other end of the biological filter 4 is connected on a photocatalyst 5, the other end of the photocatalyst 5 is connected with an inlet of a third-level spray tower 9, and an outlet of the third-level spray tower 9 is connected on a chimney 8 through an activated carbon absorber 6 and an induced draft fan 7.

The kitchen transfer station 1 comprises an air pipe 11, a gas collecting hood 12, a separatingcylinder 13, amotor 14 and asupport frame 15, wherein thesupport frame 15 is movably connected with the separatingcylinder 13 through a roller, one end of the separatingcylinder 13 is connected with a rotating shaft of themotor 14, the other end of the separatingcylinder 13 is connected with a feeding funnel, the gas collecting hood 12 is installed above the separatingcylinder 13, and the gas collecting hood 12 is connected with a primary spray tower 2 through the air pipe 11;

kitchen waste flowing into the feeding funnel falls into the separatingcylinder 13, kitchen waste gas in the separatingcylinder 13 flows into the primary spray tower 2 through the gas collecting hood 12 and the air pipe 11, and the gas collecting hood 12 collects waste gas quickly.

The structure of the first-level spray tower 2, the second-level spray tower 3 and the third-level spray tower 9 is the same, the first-level spray tower 2 comprises atower body 21, a circulatingwater tank 22, adosing mechanism 23, aspraying mechanism 24, anegative pressure mechanism 25 and acleaning mechanism 26, the circulatingwater tank 22 is located at the bottom of thetower body 21, thecleaning mechanism 26 is located inside the circulatingwater tank 22, thenegative pressure mechanism 25 is located at the top of thetower body 21, one end of thespraying mechanism 24 is connected with the circulatingwater tank 22, the other end of thespraying mechanism 24 penetrates out of thetower body 21 to be connected with thedosing mechanism 23, thespraying mechanism 24 is inserted into the top of thetower body 21 again and located below thenegative pressure mechanism 25, the top outlet of the first-level spray tower 2 is connected to the side inlet of the second-level spray tower 3 through a pipeline, and acid-base neutralization is achieved through.

Thenegative pressure mechanism 25 comprises alantern ring 251,fan blades 252 and asupport column 253, thelantern ring 251 is fixed on the inner wall of thetower body 21, thesupport column 253 transversely penetrates through thelantern ring 251, thefan blades 252 with power drive are installed in the middle of thesupport column 253, thefan blades 252 rotate under the power drive, kitchen waste gas is discharged into the secondary spray tower 3 under the action of negative pressure, and the treated waste gas is quickly driven by thefan blades 252 to ascend to enter the next process;

the circulatingwater tank 22 comprises an expandedpart 221, awater storage container 222 and afilter screen 223, the top surface of thewater storage container 222 is connected with the expandedpart 221, thefilter screen 223 is installed at the joint of the expandedpart 221 and thewater storage container 222, two symmetrical ends of the expandedpart 221 penetrate through thetower body 21 and are respectively connected with thespraying mechanism 24 and therotating motor 10, the expandedpart 221 rotates around thespraying mechanism 24 and therotating motor 10, thecleaning mechanism 26 is installed on the expandedpart 221 above thefilter screen 223, thewater storage container 222 is used for collecting sprayed liquid, and thefilter screen 223 filters settled impurities to avoid subsequent atomization and blockage;

thecleaning mechanism 26 comprises amotor 261, abrush 262 and abearing seat 263, the bearingseat 263 is fixed on the top surface of thefilter screen 223, the rotating shaft of themotor 261 penetrates through thebearing seat 263 to be connected with thebrush 262, the bottom surface of thebrush 262 is contacted with thefilter screen 223, therotating motor 10 rotates until thecleaning mechanism 26 is positioned below thefilter screen 223, themotor 261 drives thebrush 262 to rotate for cleaning impurities accumulated on the surface of thefilter screen 223, after spraying is finished, therotating motor 10 is used for driving the circulatingwater tank 22 to rotate, the impurities on thefilter screen 223 are removed, and therefore the problem of blockage caused by long-time use is avoided;

thespraying mechanism 24 comprises anadapter cylinder 241, amain pipe 242, adischarge pipe 243, aspraying circulating pump 244, aspray pipe 245 and anatomizing head 246, theadapter cylinder 241 is fixed on the outer wall of thetower body 21, one end of each of themain pipe 242 and thedischarge pipe 243 is inserted into theadapter cylinder 241, the other end of themain pipe 242 is connected with an expandingpart 221 above thefilter screen 223, thedischarge pipe 243 is connected to thespraying circulating pump 244, the output end of thespraying circulating pump 244 is connected with thespray pipe 245, thespray pipe 245 is inserted into thetower body 21 and connected with theatomizing head 246, and liquid in thewater storage pan 222 is sucked by thespraying circulating pump 244 and atomized and sprayed.

Themedicine adding mechanism 23 comprises aservo motor 231, amedicine box 232, amedicine adding pipe 233, asealing disc 234, across rod 235, amain shaft 236 and a sealingbarrel 237, one end of themain shaft 236 is fixed on theservo motor 231, the other end of themain shaft 236 is inserted by thecross rod 235, and thecross rod 235 slides in themain shaft 236;

thecross rod 235 is inserted into thesealing cylinder 237 to be connected with thesealing disc 234, thesealing disc 234 is in threaded connection with thesealing disc 234, the top of thesealing cylinder 237 is communicated with thedischarge pipe 243 through themedicine feeding pipe 233, the sealingcylinder 237 is fixed on themedicine box 232, themedicine box 232 is communicated with the side wall of thesealing cylinder 237, thesealing disc 234 moves leftwards until thedischarge pipe 243 is communicated with themedicine box 232, thesealing disc 234 blocks themedicine box 232 and thedischarge pipe 243 rightwards, themain shaft 236 of thesealing disc 236 drives thecross rod 235 to rotate, thesealing disc 234 rotates to move leftwards or rightwards along the sealingcylinder 237, so that the opening and closing states of.

The invention also discloses a process of the kitchen waste and waste gas treatment combined device, which comprises the following steps:

the first step is as follows: collecting malodorous waste gas generated in each kitchen waste disposal procedure, and conveying the malodorous waste gas to a primary spray tower 2;

the second step is that: the acid liquor spraying is carried out for pretreatment, the first-stage spraying tower 2 is a differential contact counterflow type, and the filler in the tower is a basic component for gas-liquid two-phase contact, so that the large enough surface area can be provided, and excessive resistance to gas-liquid flow cannot be caused. The absorbent is an acidic agent (sulfuric acid and the like), the acidic agent is added into water, the pH value is adjusted to a set value meeting the operation, and the absorbent is continuously contacted with the waste gas in the filler to purify and remove dust particles and alkaline VOCs molecules. At the same time, the exhaust gas temperature is reduced.

The third step: the second stage spray tower 3 is pretreated, the spray tower is in differential contact countercurrent, and the filler in the tower is a basic component for gas-liquid two-phase contact, and can provide enough large surface area and cannot cause excessive resistance to gas-liquid flow. The absorbent is alkaline agent (caustic soda, etc.), the alkaline agent is added into water, the PH value is adjusted to the set value meeting the operation, the absorbent is continuously contacted with the waste gas in the filler, and the dust particles and the acidic VOCs molecules are purified and removed. At the same time, the exhaust gas temperature is reduced.

The fourth step: the biological filter 4 is composed of a washing humidification section and a biological section, waste gas after acid and alkali washing pretreatment enters the washing section, residual chemical agents in the waste gas are mainly washed and removed, the PH value is adjusted to be neutral, the waste gas is homogenized and enters the biodegradation section, volcanic rock packing is adopted as biological filter bed packing, a biological membrane with a certain thickness is formed on the surface of the biological filter bed packing through membrane hanging, and various dominant floras with deodorization capacity are fixed. Odorous gas passes through the filler space from bottom to top, and waste gas is intercepted and decomposed; the upper part of the filler is intermittently sprayed with water, so that the wetting of the filler is ensured, and favorable conditions are provided for biological metabolism and reproduction. The waste gas is contacted with the water film on the surface of the filling material (biological medium) moistened by the dispersed water to be dissolved, and simultaneously, the waste gas is absorbed, decomposed and utilized by the microorganisms inhabiting the filling material (biological medium), and the three phenomena of oxidation, decomposition and utilization are synchronously carried out, so that H in the waste gas is mainly removed₂S、NH₃And methyl sulfide and the like are easy to biodegrade waste gas components.

The fifth step: the photocatalyst 5 is subjected to chemical washing and biological purification, the waste gas enters a photocatalytic section, the photocatalytic section adopts a foam metal tip nano composite technology, the excellent characteristics of the nano photocatalyst material and the foam nickel are integrated, and a certain amount of nano TiO is uniformly loaded on the foam nickel substrate₂To obtain aAnd (3) a supported photocatalytic functional material. The foam nickel can be used as an excellent photocatalyst carrier due to the unique three-dimensional network structure, and the nano TiO loaded on the surface of the foam nickel₂Is one of the most studied and applied photocatalysts so far. TiO 2₂Its electronic structure is characterized by a full valence band and an empty conduction band, and under the condition of light irradiation whose energy is greater than its band gap energy (Eg 3.2ev, equivalent to photon energy with wave length of 387.5 nm), the electron can be excited from valence band to conduction band to form free electron, and a positively charged hole can be formed in valence band to form electron-hole pair

TiO₂+hυ→(TiO₂)h++(TiO₂)e-

The valence band hole is a good oxidant and the conduction band electron is a good reductant. The holes generally react with surface-adsorbed H2O or OH-ions to form reactive hydroxyl groups (. OH) with strong oxidizing properties

h++H₂O→·OH+H+

h++OH-→·OH

The electrons react with the surface-adsorbed oxygen molecule (O2) to generate superoxide ions (. O2-). The superoxide ion can further react with water to generate perhydroxyl (OOH) and hydrogen peroxide (H2O2)

e-+O₂→·O^2-

·O^2-+H₂O→·OOH+OH^-

2·OOH→H₂O₂+O₂

·OOH+H₂O+e-→H₂O₂+OH^-

H₂O₂+e-→·OH+OH^-

TiO₂The photocatalytic oxidation is active hydroxyl (OH) and other active oxidation species (O)^2-，·OOH，H₂O₂) The result of the combined action. In TiO₂The OH group generated on the surface has high reactivity and reaction energy higher than that of various chemical bond energies in organic matters, and is added with O^2-，·OOH，H₂O₂The synergistic effect of the active oxidation substances can quickly and effectively decompose the organic substances. The main functions are as follows: the front end is notThe treated trace VOCs are subjected to photocatalytic decomposition, mainly comprising methyl mercaptan, dimethyl sulfide, aldehydes, esters and the like, so as to achieve inorganic decomposition and harmless decomposition.

And a sixth step: after water spraying treatment, the third stage spray tower 9 is in differential contact countercurrent type, and the filler in the tower is a basic component for gas-liquid two-phase contact, and can provide enough large surface area and cannot cause excessive resistance to gas-liquid flow. The absorbent is water solution, water is contacted with waste gas continuously in the filler, and the absorbent further absorbs light to catalyze and decompose the fine molecules, free oxygen and the like.

The seventh step: and in the dewatering and demisting section, the waste gas after water spraying, washing and purifying contains water mist, and the water mist is removed through the combined filler, so that the waste gas treatment in the subsequent working section is facilitated.

Eighth step: the activated carbon absorber 6 absorbs the waste gas, and can further remove residual trace VOCs molecules and peculiar smell molecules of the waste gas treated in the previous working section as a tail end deep guarantee purification working section of the whole treatment process, and the activated carbon absorption is a measure for effectively removing odor, natural and synthetic dissolved organic matters, micro-pollutants and the like. Most of larger organic molecules, aromatic compounds, halogenated alkynes and the like can be firmly adsorbed on the surface of the active carbon or in gaps, and have obvious removal effect on humus, synthetic organic matters and low molecular weight organic matters.

The ninth step: the treated waste gas reaching the standard is discharged by the induced draft fan 7 through the chimney 8.

The combined treatment process solves the problems of waste gas oil removal, temperature reduction, dust removal, VOCs removal, odor removal and the like, and has the advantages of high waste gas purification efficiency, good deodorization effect, strong impact resistance, stable operation, simple and convenient operation and maintenance, moderate primary investment, low operating cost, no increase of secondary pollution, compact equipment, small occupied area and low energy consumption. Can stably run for a long time and reach the relevant national emission standard.

In addition, the process can simplify the process sections according to the requirements of the project by chemical washing absorption, water absorption, microorganism, photocatalysis and activated carbon adsorption, and then combine the process sections into an integrated device, so that the process has the advantages of more stable operation, reduced energy consumption, lower investment, compact equipment, small occupied area and the like while ensuring the purification efficiency.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The utility model provides a kitchen garbage exhaust-gas treatment composite set which characterized in that: the device comprises a kitchen transfer station (1), a primary spray tower (2), a secondary spray tower (3), a biological filter (4), a photocatalyst (5), an activated carbon absorber (6), an induced draft fan (7), a chimney (8) and a tertiary spray tower (9);

meal kitchen transfer station (1) connects on one-level spray column (2), one-level spray column (2) connects on second grade spray column (3), second grade spray column (3) are connected with the one end of biological filter (4), the other termination of biological filter (4) is on photocatalyst apparatus (5), the other end and the import of tertiary spray column (9) of photocatalyst apparatus (5) meet, the export of tertiary spray column (9) connects on chimney (8) through activated carbon absorber (6) and draught fan (7).

2. The kitchen waste and waste gas treatment combination device as claimed in claim 1, wherein the kitchen transfer station (1) comprises an air pipe (11), a gas collecting hood (12), a separation cylinder (13), a motor (14) and a support frame (15), the support frame (15) is movably connected with the separation cylinder (13) through a roller, one end of the separation cylinder (13) is connected with a rotating shaft of the motor (14), the other end of the separation cylinder (13) is connected with a feeding funnel, the gas collecting hood (12) is installed above the separation cylinder (13), and the gas collecting hood (12) is connected with the primary spray tower (2) through the air pipe (11);

the kitchen waste gas that feed hopper flowed in falls into separator tube (13), the kitchen waste gas of separator tube (13) flows into in one-level spray column (2) through gas collecting channel (12) and tuber pipe (11).

3. The kitchen waste and waste gas treatment combined device according to claim 2, wherein the first-stage spray tower (2), the second-stage spray tower (3) and the third-stage spray tower (9) have the same structure, the first-stage spray tower (2) comprises a tower body (21), a circulating water tank (22), a dosing mechanism (23), a spraying mechanism (24), a negative pressure mechanism (25) and a cleaning mechanism (26), the circulating water tank (22) is positioned at the bottom of the tower body (21), the cleaning mechanism (26) is positioned inside the circulating water tank (22), the negative pressure mechanism (25) is positioned at the top of the tower body (21), one end of the spraying mechanism (24) is connected with the circulating water tank (22), the other end of the spraying mechanism (24) penetrates out of the tower body (21) to be connected with the dosing mechanism (23), the spraying mechanism (24) is reinserted into the top of the tower body (21) to be positioned below the negative pressure mechanism (25), the top outlet of the first-stage spray tower (2) is connected to the side inlet of the second-stage spray tower (3) through a pipeline.

4. The kitchen waste and waste gas treatment combined device is characterized in that the negative pressure mechanism (25) comprises a sleeve ring (251), fan blades (252) and a support column (253), the sleeve ring (251) is fixed on the inner wall of the tower body (21), the support column (253) transversely penetrates through the sleeve ring (251), the fan blades (252) with power drive are installed in the middle of the support column (253), the fan blades (252) are driven to rotate by the power drive, and kitchen waste gas is discharged into the secondary spray tower (3) under the action of negative pressure;

the circulating water tank (22) comprises an expansion part (221), a water storage container (222) and a filter screen (223), the top surface of the water storage container (222) is connected with the expansion part (221), the filter screen (223) is installed at the joint of the expansion part (221) and the water storage container (222), two symmetrical ends of the expansion part (221) penetrate through the tower body (21) and are respectively connected with the spraying mechanism (24) and the rotating motor (10), the expansion part (221) rotates around the spraying mechanism (24) and the rotating motor (10), and a cleaning mechanism (26) is installed on the expansion part (221) above the filter screen (223);

the cleaning mechanism (26) comprises a motor (261), a brush (262) and a bearing seat (263), the bearing seat (263) is fixed on the top surface of the filter screen (223), a rotating shaft of the motor (261) penetrates through the bearing seat (263) to be connected with the brush (262), the bottom surface of the brush (262) is in contact with the filter screen (223), the rotating motor (10) rotates until the cleaning mechanism (26) is located below the filter screen (223), and the motor (261) drives the brush (262) to rotate to clean impurities accumulated on the surface of the filter screen (223);

the spraying mechanism (24) comprises an adapter cylinder (241), a main pipe (242), a discharge pipe (243), a spraying circulating pump (244), a spraying pipe (245) and an atomizing head (246), the adapter cylinder (241) is fixed on the outer wall of the tower body (21), one end of each of the main pipe (242) and the discharge pipe (243) is inserted into the adapter cylinder (241), the other end of the main pipe (242) is connected with an expanding part (221) above the filter screen (223), the discharge pipe (243) is connected onto the spraying circulating pump (244), the output end of the spraying circulating pump (244) is connected with the spraying pipe (245), the spraying pipe (245) is inserted into the tower body (21) and is connected with the atomizing head (246), and liquid in the spraying circulating pump (244) is sprayed in a water storage vessel (222) in an atomizing mode through the spraying pipe (245) and.

5. The kitchen waste and waste gas treatment combined device is characterized in that the dosing mechanism (23) comprises a servo motor (231), a medicine box (232), a dosing pipe (233), a sealing disc (234), a cross rod (235), a main shaft (236) and a sealing cylinder (237), one end of the main shaft (236) is fixed on the servo motor (231), the other end of the main shaft (236) is inserted by the cross rod (235), and the cross rod (235) slides in the main shaft (236);

the cross rod (235) is inserted into a sealing cylinder (237) and is connected with the sealing disc (234), the sealing disc (234) is in threaded connection with the sealing disc (234), the top of the sealing cylinder (237) is communicated with a discharge pipe (243) through a medicine adding pipe (233), the sealing cylinder (237) is fixed on a medicine box (232), the medicine box (232) is communicated with the sealing cylinder (237), the sealing disc (234) moves to the left to the discharge pipe (243) to be communicated with the medicine box (232), and the sealing disc (234) blocks the medicine box (232) and the discharge pipe (243) to the right.

6. The kitchen waste and waste gas treatment process of the kitchen waste and waste gas treatment combined device according to claim 5, characterized by comprising the following steps:

s1, collecting waste gas; foul waste gas generated in the process of disposal of the kitchen transfer station (1) is provided with a gas collecting hood (12) and is conveyed into the primary spray tower (2);

s2, spraying acid and alkali liquor for pretreatment: the first-stage spray tower (2) and the second-stage spray tower (3) are continuously contacted with the waste gas through a spray mechanism (24), so that dust particles, acid and alkaline VOCs molecules are purified and removed, and the temperature of the waste gas is reduced;

s3, degradation: the waste gas after the acid and alkali washing pretreatment enters a biological filter (4) to wash and remove the residual chemical agent, the PH value is adjusted to be neutral, the waste gas is homogenized and enters a biodegradation section, and H2S, NH3 and methyl sulfide in the waste gas are removed from the easily biodegradable waste gas components;

s4, photocatalysis: after chemical washing and biological purification, the waste gas enters a photocatalytic section, and the trace VOCs which are not treated at the front end are subjected to photocatalytic decomposition, including the photocatalytic decomposition of methyl mercaptan, dimethyl sulfide, aldehydes and esters;

s5, water spraying post-treatment: the three-stage spray tower (9) further absorbs light to be decomposed and then subdivides molecules and free oxygen;

s6, dewatering and demisting: the waste gas after water spraying, washing and purifying contains water mist, and the water mist is removed through the combined filler;

s7, activated carbon adsorption: residual trace VOCs molecules and peculiar smell molecules of the waste gas treated in the previous working section are further removed, and the waste gas is firmly adsorbed on the surface of the active carbon or in gaps, and has obvious removal effect on humus, synthetic organic matters and low molecular weight organic matters;

s8, discharging: the treated waste gas reaching the standard is discharged by the induced draft fan (7) through the chimney (8).

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