One way of life rubbish plasma gasification ReaktionsofenTechnical field
The present invention relates to the gasification gas making device of the solid-state castoff based on domestic waste, specifically a kind of domestic refuse plasma gasification Reaktionsofen that can prevent dioxin generation and heavy metal secondary pollution.
Background technology
Along with the sustainable growth of global economy and the acceleration of urbanization process, the generation of domestic refuse has become a day by day serious environmental problem.The continuous increase of municipal wastes output and the environmental pollution caused thereof have become the problem of institute of various countries facing, and the harmless treatment of domestic waste promotes one of economy and the ecotope important measures reaching Sustainable development.
At present, domestic waste innoxious process for treating has composting technology, Landfill, incineration technology and gasification technology etc.Landfill or compost all can not realize the innoxious of refuse treatment and minimizing completely, and landfill still needs to take a large amount of soil.Because burning disposal can realize municipal wastes energy recovery, subtract the objects such as appearance, loss of weight, high-temperature sterilization, there is obvious advantage in environment protection and the utilization of resources, thus developed faster in China in recent years.But waste incineration causes the secondary pollution problems such as dioxin and heavy metal can not be ignored, and constrains the large-scale application of garbage incineration technology.
Gasification technology is a kind of novel technology of garbage disposal, compared with the waste disposal method of routine, Gasification Technique has that energy recovery utilization ratio is high, secondary pollution is little, exhaust gas volumn is little, finishing apparatus is simple, such as: publication number is CN104449854A, publication date is the Chinese patent literature on March 25th, 2015, disclose a kind of integral type rubbish plasma gasification stove with water wall, vapourizing furnace burner hearth is divided into the waste residue melting zone of the synthetic gas reformer section on top, the gasification zone at middle part and bottom; The inherent same level in synthetic gas reformer section is evenly provided with three plasma torchs one; The side of gasification zone is connected with feed system, and side is also provided with inlet mouth, and bottom surface is provided with the fire grate for carrying rubbish; Be provided with in the middle of the side of waste residue melting zone three around plasma torch two.The vapourizing furnace of the program can make traditional gasification, synthetic gas reform to be melted in a vapourizing furnace with waste residue to complete, and utilizes rubbish self calorific value first to carry out traditional gasification.And the combination of gasification and plasma melting treatment technology makes while being used to the organic composition of rubbish, stabilization harmless treatment and recycling can be carried out to inorganic components, thus fundamentally solve the secondary pollution such as dioxin and heavy metal problem, there is vast potential for future development.
But the plasma refuse gasification technology of present stage still has many weak points.First, need greatly power with plasma torch direct gasification rubbish, its specific power consumption can arrive 30% ~ 40% of its electrogenesis power, causes operation cost greatly to increase because power consumption is too high, makes it not possess commercial off-the-shelf and is worth.Its two, the method gasification rubbish, subsequent gases scavenging process also needs Jia dioxin treatment unit, adds disposable input in advance, and its equipment cost is significantly improved.3rd, use plasma torch direct gasification rubbish, because its thermo parameters method is uneven, rubbish completely by pyroprocessing, can not be had a large amount of dioxin and other objectionable impuritiess, cause the process of its waste residue to become a difficult problem again in the waste residue of discharge.4th, the conventional garbage plasma gasification furnace type of furnace is relatively simple, and because temperature distribution in plasma gasification furnace is very uneven, plasmatorch region temperature is higher, burner hearth is heated inequality, easily breaks.And refractory materials is integrated poured, vaporizer burner hearth is also made to change very difficulty.In addition, existing chamber structure is unfavorable for the optimization of reaction process, makes gasification hearth space availability ratio low.
Summary of the invention
The present invention is directed to defect and the deficiency of the existence of existing plasma gasification technology, one way of life rubbish plasma gasification Reaktionsofen is provided, utilize the ash melting that plasma torch will produce after domestic garbage pyrolysis gasification as high-quality external heat source, eliminate domestic refuse issuable all objectionable impuritiess in pyrolytic gasification process, reduce disposable input cost and the operation cost of rubbish plasma gasification, and make synthetic gas purer.
Technical scheme of the present invention is as follows:
One way of life rubbish plasma gasification Reaktionsofen, is characterized in that: comprise the pyrolytic gasification reaction chamber on the top connected up and down and the ash melting room of bottom, the overall chamber structure reduced in upper and lower two-part, and the cross section of horizontal direction is rounded; Described pyrolytic gasification reaction chamber is divided into top end socket, middle cylinder and bottom cone mouth from longitudinal direction, top end socket embedded installation one garbage inlet, garbage inlet is a long narrow tapered tube, the top of middle cylinder has syngas outlet, and syngas outlet mounting height is higher than the baseplane of the tapered tube of garbage inlet; Described ash melting room comprises cylindrical shell and bottom bulkhead, described cylindrical shell is evenly arranged the multiple plasma torch installing ports being in same level, plasma torch installing port is all provided with plasma torch, angle between the medullary ray of plasma torch installing port and the vertical center line of ash melting room is γ angle, γ angle is 50-70 °, angle between the medullary ray of plasma torch installing port and the horizontal center line of cylindrical shell is δ angle, and δ angle is 30-50 °; Described cylindrical shell is also evenly arranged the multiple gas inlets being in another same level, the angle between the medullary ray of gas inlet and the vertical center line of cylindrical shell is ε angle, and ε angle is 50-70 °, the medullary ray of gas inlet and the horizontal centre line parallel of cylindrical shell; Described gas inlet is arranged at the top of plasma torch installing port.
The cone angle of described tapered tube is 6-10 °, and the inwall of tapered tube is refractory liner.
Described pyrolytic gasification reaction chamber comprises inwall, thermal insulation layer and outer wall, and inwall is refractory materials protection lining, and refractory materials protection lining builds shaping by refractory materials segmentation, and outer wall is steel plate housing; The housing of described top end socket and the housing of middle cylinder are by Flange joint, and the housing of middle cylinder and the housing of bottom cone mouth are by being welded to connect.
Described middle cylinder also has series of temperature and survey mouth, pressure survey mouth, the medullary ray that the medullary ray of temperature survey mouth, pressure survey mouth is vertical with the vertical center line of middle cylinder.
The cone angle beta of described bottom cone mouth is 60-80 °.
Described ash melting room comprises inwall, thermal insulation layer and housing from the inside to the outside successively, and inwall is corundum liner, and corundum liner is that in the dismountable corundum of polylith, pad is spliced.Corundum liner is made up of piecemeal, so that dismounting and change, also effectively can solve the integrated poured inequality of being heated caused, the problem such as easily to break.
The housing of the housing upper end of the cylindrical shell of described ash melting room and the bottom cone mouth of pyrolytic gasification reaction chamber is by Flange joint, and Flange joint is passed through in the upper end of the housing lower end of cylindrical shell and the housing of bottom bulkhead.
The cylindrical shell of described ash melting room also has series of temperature and survey mouth, pressure survey mouth, the medullary ray that the medullary ray of temperature survey mouth, pressure survey mouth is vertical with the vertical center line of cylindrical shell.
Described bottom bulkhead has a slag-drip opening, and slag-drip opening is a long narrow laryngeal inlet, and slag-drip opening inwall is refractory liner, and slag-drip opening outer wall is steel plate.
Described plasma gasification reactor is fixed by three hanging supports be evenly arranged on the middle cylinder of pyrolytic gasification reaction chamber.
Working process of the present invention is:
Domestic refuse enters in pyrolytic gasification reaction chamber from the garbage inlet at plasma gasification Reaktionsofen top, carries out heat exchange with the high-temperature synthesis gas of reacting in ash melting; Domestic refuse carries out drying, pyrolytic gasification reaction from top to bottom successively in pyrolytic gasification reaction chamber;
Thermal source required for the reaction of drying garbage, pyrolytic gasification is by the indoor lime-ash of ash melting and part refuse pyrolysis gasifies, the hot synthesis gas of burning generation provides; The domestic refuse of the solid residue that the rubbish after pyrolytic gasification produces and non-complete reaction enters into ash melting room by cone mouth bottom pyrolytic gasification reaction chamber;
Under the high temperature heat source that the domestic refuse of the indoor solid residue of ash melting and non-complete reaction provides at plasma torch, there is pyrolytic gasification further react; Air required for the after-flame of the unreacted carbon residue in ash melting room is supplemented by gas inlet; The high temperature that afterburnt remaining slag provides through melting plasmatorch carries out melting, and by high temperature, organism unreacted in slag and objectionable impurities are gasified again, and remove dioxin and furans in slag, the inorganics and the metal that finally become molten state discharge plasma gasification Reaktionsofen by the outage on slag-drip opening.
The synthetic gas that ash melting room second gasification and after-flame produce and the synthetic gas that middle pyrolytic gasification reaction chamber produces are discharged reactor by syngas outlet and are entered into follow-up synthetic gas and utilize system.
Beneficial effect of the present invention is as follows:
(1) the present invention adopts that its top feed, sidepiece are vented, bottom slagging structure makes that the toxic and harmful in refuse gasification process is got rid of in reforming reaction room, the lime-ash that produces after pyrolytic gasification becomes harmless vitreous state slag through gasification and melting room by the high-temperature fusion that plasmatorch produces, and solves noxious gas emission and lime-ash in incineration treatment of garbage process thoroughly and needs the problem of reprocessing.
(2) the present invention's two-part chamber structure of adopting size from top to bottom to reduce, solve existing plasma gasification furnace burner hearth and to arrange in the unreasonable rubbish caused that carbonaceous component transformation efficiency is on the low side, Flow and heat flux distributes problem improperly, improve plasma gasification furnace space availability ratio.
(3) the present invention's two-part chamber structure of adopting size from top to bottom to reduce, inboard wall of burner hearth builds shaping by refractory materials segmentation, wherein bottom ashe melter is made up of removable highdensity corundum liner, and corundum liner is made up of piecemeal, so that dismounting and change.This measure effectively can solve the integrated poured burner hearth caused and to be heated inequality, easily breaks, and is convenient to change burner hearth bottom vaporizer.
(4) the present invention utilizes the calorific value of rubbish self to carry out anoxycausis pyrolytic gasification, carries out plasma pyroprocessing afterwards, this avoid plasma high temperature and directly carry out pyrolytic gasification to rubbish, greatly reduce power consumption the slag that it produces.
Accompanying drawing explanation
Fig. 1 is longitudinal profile structural representation of the present invention;
Fig. 2 is the A-A cross section schematic diagram in Fig. 1;
Fig. 3 is the B-B cross section schematic diagram in Fig. 1.
Wherein, Reference numeral is: 1 refractory materials protection lining, 2 thermal insulation layers, 3 housings; 4 garbage inlet, 4-1 tapered tube, 5 pyrolytic gasification reaction chambers, 5-1 top end socket; 5-2 middle cylinder, cone mouth bottom 5-3,5-4 flange, 5-5 syngas outlet; 5-6 temperature surveys mouth, 5-7 pressure surveys mouth, 6 ash melting rooms, 6-1 ash melting room cylindrical shell, 6-2 bottom bulkhead; 6-3,6-4 flange, 6-5 plasma torch installing port, 6-6 gas inlet; 6-7 temperature surveys mouth, 6-8 pressure surveys mouth, 7 slag-drip openings, 8 hanging supports.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
As Figure 1-3, one way of life rubbish plasma gasification Reaktionsofen, comprises the pyrolytic gasification reaction chamber 5 on the top connected up and down and the ash melting room 6 of bottom, the overall chamber structure reduced in upper and lower two-part, and the cross section of horizontal direction is rounded; Described pyrolytic gasification reaction chamber 5 is divided into top end socket 5-1, middle cylinder 5-2 and bottom cone mouth 5-3 from longitudinal direction, top end socket 5-1 embedded installation one garbage inlet 4, garbage inlet 4 is a long narrow tapered tube 4-1, the top of middle cylinder 5-2 has syngas outlet 5-5, and syngas outlet 5-5 mounting height is higher than the baseplane of the tapered tube 4-1 of garbage inlet 4; Described ash melting room 6 comprises cylindrical shell 6-1 and bottom bulkhead 6-2, described cylindrical shell 6-1 is evenly arranged the multiple plasma torch installing port 6-5 being in same level, plasma torch installing port 6-5 is all provided with plasma torch, angle between the medullary ray of plasma torch installing port 6-5 and the vertical center line of ash melting room 6 is γ angle, γ angle is 50-70 °, angle between the medullary ray of plasma torch installing port 6-5 and the horizontal center line of cylindrical shell 6-1 is δ angle, and δ angle is 30-50 °; Described cylindrical shell 6-1 is also evenly arranged the multiple gas inlet 6-6 being in another same level, angle between the medullary ray of gas inlet 6-6 and the vertical center line of cylindrical shell 6-1 is ε angle, ε angle is 50-70 °, the medullary ray of gas inlet 6-6 and the horizontal centre line parallel of cylindrical shell 6-1; Described gas inlet 6-6 is arranged at the top of plasma torch installing port 6-5.
The number of described plasma torch installing port 6-5 can be two, also can be three, also can be four, or more, arranges as the case may be.
The number of described gas inlet 6-66-6 can be four, or six, or eight, or ten, or more, arrange as the case may be.
The cone angle of described tapered tube 4-1 is 6-10 °, and the inwall of tapered tube 4-1 is refractory liner.
Described pyrolytic gasification reaction chamber 5 comprises inwall, thermal insulation layer 2 and outer wall, and inwall is refractory materials protection lining 1, and refractory materials protection lining 1 builds shaping by refractory materials segmentation, and outer wall is steel plate housing 3; The described housing of top end socket 5-1 is connected by flange 5-4 with the housing of middle cylinder 5-2, and the housing of middle cylinder 5-2 and the housing of bottom cone mouth 5-3 are by being welded to connect.
Described middle cylinder 5-2 also has series of temperature and survey mouth 5-6, pressure survey mouth 5-7, the medullary ray that the medullary ray of temperature survey mouth 5-6, pressure survey mouth 5-7 is vertical with the vertical center line of middle cylinder 5-2.
The cone angle beta of described bottom cone mouth 5-3 is 60-80 °.
Described ash melting room 6 comprises corundum liner, inwall, housing and thermal insulation layer from the inside to the outside successively, and corundum liner is that in the dismountable corundum of polylith, pad is spliced, and inwall is integrated poured refractory liner, and thermal insulation layer is between inwall and housing.Corundum liner is made up of piecemeal, so that dismounting and change, also effectively can solve the integrated poured inequality of being heated caused, the problem such as easily to break.
The housing upper end of the cylindrical shell 6-1 of described ash melting room 6 is connected by flange 6-3 with the housing of the bottom cone mouth 5-3 of pyrolytic gasification reaction chamber 5, and the housing lower end of cylindrical shell 6-1 is connected by flange 6-4 with the upper end of the housing of bottom bulkhead 6-2.
The cylindrical shell 6-1 of described ash melting room 6 also has series of temperature and survey mouth 6-7, pressure survey mouth 6-8, the medullary ray that the medullary ray of temperature survey mouth 6-7, pressure survey mouth 6-8 is vertical with the vertical center line of cylindrical shell 6-1.
Described bottom bulkhead 6-2 has a slag-drip opening 7, and slag-drip opening 7 is a long narrow laryngeal inlet, and slag-drip opening 7 inwall is refractory liner, and slag-drip opening 7 outer wall is steel plate.
Described plasma gasification reactor is fixed by three hanging supports 8 be evenly arranged on the middle cylinder 5-2 of pyrolytic gasification reaction chamber 5.
Working process of the present invention is:
Domestic refuse enters in pyrolytic gasification reaction chamber 5 from the garbage inlet 4 at plasma gasification Reaktionsofen top, carries out heat exchange with the high-temperature synthesis gas of reacting in ash melting; Domestic refuse carries out drying, pyrolytic gasification reaction from top to bottom successively in pyrolytic gasification reaction chamber 5;
Thermal source required for the reaction of drying garbage, pyrolytic gasification is gasified by lime-ash in ash melting room 6 and part refuse pyrolysis, the hot synthesis gas of burning generation provides; The domestic refuse of the solid residue that the rubbish after pyrolytic gasification produces and non-complete reaction enters into ash melting room 6 by cone mouth 5-3 bottom pyrolytic gasification reaction chamber 5;
Pyrolytic gasification reaction is there is further under the high temperature heat source that the domestic refuse of solid residue and non-complete reaction provides at plasma torch in ash melting room 6; Air required for the after-flame of the unreacted carbon residue in ash melting room 6 is supplemented by gas inlet 6-6; The high temperature that afterburnt remaining slag provides through melting plasmatorch carries out melting, and by high temperature, organism unreacted in slag and objectionable impurities are gasified again, and remove dioxin and furans in slag, the inorganics and the metal that finally become molten state discharge plasma gasification Reaktionsofen by the outage on slag-drip opening 7.
The synthetic gas that ash melting room 6 second gasification and after-flame produce and the synthetic gas that middle pyrolytic gasification reaction chamber 5 produces are discharged reactor by syngas outlet 5-5 and are entered into follow-up synthetic gas and utilize system.