CN210891664U - Urban domestic garbage pyrolysis gasification power generation system - Google Patents
Urban domestic garbage pyrolysis gasification power generation system Download PDFInfo
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- CN210891664U CN210891664U CN201921891598.2U CN201921891598U CN210891664U CN 210891664 U CN210891664 U CN 210891664U CN 201921891598 U CN201921891598 U CN 201921891598U CN 210891664 U CN210891664 U CN 210891664U
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Abstract
The utility model discloses a municipal solid waste pyrolysis gasification power generation system, the system includes pyrolysis gasifier, cyclone, the spray column, the subsider, gas boiler, cold sediment ware and power generation system, the outside of pyrolysis gasifier has the jacket, the gas outlet on pyrolysis gasifier upper portion is linked together with cyclone's entry, the solid export of pyrolysis gasifier lower part is linked together with cold sediment ware, cyclone's gas outlet is linked together with spray column's gas entry, cyclone's solid export is linked together with cold sediment ware, spray column's gas outlet is linked together with gas boiler, gas boiler's export is linked together with flue gas treatment system; the utility model discloses can gasify city domestic waste pyrolysis back earlier, generate a small amount of lime-ash and flying dust, realize the minimizing of rubbish, in pyrolysis gasification process, gasification temperature is very high, and the content of reaction back oxygen is very low, can reduce the formation of dioxin.
Description
Technical Field
The utility model belongs to the technical field of the municipal solid waste treatment technique and specifically relates to a municipal solid waste pyrolysis gasification power generation system is related to.
Background
Along with the rapid development of social economy in China, the urbanization process is accelerated, the living standard of people is improved, the garbage generated in the urban living process is rapidly increased, and the urban domestic garbage treatment causes wide attention of all social circles. At present, the treatment method of municipal solid waste mainly comprises three methods of composting, landfill and incineration. The landfill and incineration are the most main treatment modes, a large amount of land is occupied for landfill, most of the landfill is not subjected to harmless treatment, methane, landfill leachate and the like can be generated after the landfill, and harmful components in the methane, the landfill leachate and the like cause serious pollution to the atmosphere, soil, surface water and underground water, destroy the ecological environment and even harm the human health. The volume reduction, the decrement and the harmless degree of the waste incineration technology are high, the heat generated in the incineration process is used for generating electricity, the energy of the waste can be realized, and the method is a better waste treatment method, but has the problems of low utilization efficiency, serious environmental pollution and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a municipal solid waste pyrolysis gasification power generation system, which can realize the reduction of garbage and simultaneously reduce the emission of dioxin.
In order to realize the purpose, the utility model discloses a technical scheme is:
a municipal solid waste pyrolysis gasification power generation system comprises a pyrolysis gasifier 1, a cyclone separator 3, a spray tower 4, a settling tank 5, a gas-fired boiler 6, a slag cooler 8 and a power generation system 9, wherein a jacket 2 is arranged outside the pyrolysis gasifier 1, a gas outlet at the upper part of the pyrolysis gasifier 1 is communicated with an inlet of the cyclone separator 3, a solid outlet at the lower part of the pyrolysis gasifier 1 is communicated with the slag cooler 8, a gas outlet of the cyclone separator 3 is communicated with a gas inlet of the spray tower 4, a solid outlet of the cyclone separator 3 is communicated with the slag cooler 8, a gas outlet of the spray tower 4 is communicated with a gas inlet of the gas-fired boiler 6, a liquid outlet of the spray tower 4 is communicated with the settling tank 5, an upper outlet of the settling tank 5 is communicated with the gas-fired boiler 6, a lower outlet of the settling tank 5 is communicated with a liquid inlet of the spray tower 4, a water outlet of the power generation system 9 is communicated with a feed water inlet of, the water outlet of the slag cooler 8 is communicated with the water supply inlet of the jacket 2, the steam outlet of the jacket 2 is communicated with the steam inlet of the gas boiler 6 and the steam inlet at the lower part of the pyrolysis gasifier 1, and the steam outlet of the gas boiler 6 is communicated with the steam inlet of the power generation system 9.
The outlet of the gas boiler 6 is communicated with a flue gas treatment system 7, the outlet of the flue gas treatment system 7 is communicated with the atmosphere, and tail gas is directly discharged.
The lower part of the pyrolysis gasification furnace 1 runs in a fluidized bed mode, the upper part runs in a riser mode, and the bottom is provided with an air chamber and an air distribution plate.
Quartz sand or silicon carbide particles are added to the lower part of the pyrolysis gasifier 1 to serve as bed materials, and when the bed materials are reduced, a part of the bed materials need to be supplemented, or part of ash slag needs to be returned to the pyrolysis gasifier to serve as the bed materials.
The air required for the pyrolysis gasifier 1 and the gas boiler 6 can be derived from the air in the waste storage space.
A method for generating electricity by pyrolyzing and gasifying municipal solid waste,
the crushed municipal solid waste enters a pyrolysis gasifier 1, is mixed with high-temperature bed materials in the pyrolysis gasifier 1 and then undergoes pyrolysis reaction, and is pyrolyzed to generate semicoke and pyrolysis gas; steam and air introduced from the lower part of the pyrolysis gasifier 1 pass through an air chamber and an air distribution plate and then contact with semicoke formed by garbage pyrolysis, the semicoke reacts with the steam and the air to generate ash and gasified gas, the ash is discharged from a solid outlet at the lower part of the pyrolysis gasifier 1 and enters a slag cooler 8, the gasified gas and the pyrolyzed gas are discharged from a gas inlet at the upper part of the pyrolysis gasifier 1 and enter a cyclone separator 3, fly ash carried by the gasified gas and the pyrolyzed gas is captured by the cyclone separator 3, the fly ash is discharged from a solid outlet at the lower part of the cyclone separator 3 and enters the slag cooler 8, and the ash and the fly ash are discharged after being cooled in the slag cooler 8;
gas is discharged from a gas outlet at the top of the cyclone separator 3 and enters a spray tower 4, the gas is washed and cooled by water sprayed by the spray tower 4, water vapor in the gas is condensed into water, the water and excessive spray water enter a settling tank 5 from the bottom of the spray tower 4, and the sprayed gas enters a gas-fired boiler 6. Water at the lower layer of the extraction settling tank 5 is sent to the top of the spray tower 4 for spraying gas, and water at the upper layer of the extraction settling tank 5 is sent to the gas-fired boiler 6;
combustible components such as carbon monoxide and methane in the gas sent into the gas boiler 6 are mixed with air and then combusted, harmful substances in water from the settling tank 5 are completely combusted, the generated flue gas enters a flue gas treatment system 7, and after denitration, desulfurization, dust removal and other treatment, the flue gas is discharged into the atmosphere;
water from a power generation system 9 enters a slag cooler 8, the water is heated by using heat of ash and fly ash and then enters a jacket 2, semicoke reacts with steam and air in a pyrolysis gasifier 1 to release heat, a part of the heat is used for heating bed materials for garbage pyrolysis, the rest of the heat is used for heating water in the jacket 2, the water in the jacket 2 is heated and then vaporized to generate steam, the steam is discharged from a steam outlet at the upper part of the jacket 2, a part of the steam is sent to the lower part of the pyrolysis gasifier 1 and sent into a furnace through an air chamber and an air distribution plate for garbage pyrolysis gasification, the rest of the steam is sent to a steam inlet of a gas boiler 6, and the steam heated by the gas boiler 6 is discharged from a steam outlet of the gas boiler 6 and enters a steam inlet of the power generation system 9 for power generation of the power generation system 9.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses can gasify city domestic waste pyrolysis earlier back, generate a small amount of lime-ash and flying dust, realize the minimizing of rubbish, in the pyrolysis gasification in-process, gasification temperature is very high, and the content of reaction back oxygen is very low, can reduce the generation of dioxin, and in the gas boiler was sent into to the water in the rubbish, the harmful substance of aquatic was burnt completely and is realized innocent treatment, outside no landfill leachate discharge system.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Wherein, 1 is a pyrolysis gasifier, 2 is a jacket, 3 is a cyclone separator, 4 is a spray tower, 5 is a settling tank, 6 is a gas boiler, 7 is a flue gas treatment system, 8 is a slag cooler, and 9 is a power generation system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model provides an urban domestic garbage pyrolysis gasification power generation system, including pyrolysis gasifier 1, cyclone 3, spray column 4, settling tank 5, gas boiler 6, cold sediment ware 8 and power generation system 9, pyrolysis gasifier 1 outside have jacket 2, pyrolysis gasifier 1 upper portion gas outlet and cyclone 3 entry are linked together, pyrolysis gasifier 1 lower part solid outlet and cold sediment ware 8 are linked together, cyclone 3 gas outlet and spray column 4 gas inlet are linked together, cyclone 3 solid outlet and cold sediment ware 8 are linked together, spray column 4 gas outlet and gas boiler 6 gas inlet are linked together, spray column 4 liquid outlet and settling tank 5 are linked together, settling tank 5 upper portion export and gas boiler 6 are linked together, settling tank 5 lower part export and spray column 4 liquid inlet are linked together, the water outlet of the power generation system 9 is communicated with the water supply inlet of the slag cooler 8, the water outlet of the slag cooler 8 is communicated with the water supply inlet of the jacket 2, the steam outlet of the jacket 2 is communicated with the steam inlet of the gas-fired boiler 6 and the steam inlet at the lower part of the pyrolysis gasifier 1, and the steam outlet of the gas-fired boiler 6 is communicated with the steam inlet of the power generation system 9.
The outlet of the gas boiler 6 is communicated with a flue gas treatment system 7, the outlet of the flue gas treatment system 7 is communicated with the atmosphere, and tail gas is directly discharged.
As the preferred embodiment of the utility model, the lower part of the pyrolysis gasifier 1 is operated in a fluidized bed mode, the upper part is operated in a riser mode, and the bottom is provided with the wind chamber and the air distribution plate.
In a preferred embodiment of the present invention, the pyrolysis gasifier 1 is filled with quartz sand or silicon carbide particles as a bed material, and when the bed material is reduced, a part of the bed material needs to be supplemented or a part of ash needs to be returned to the pyrolysis gasifier as the bed material.
As a preferred embodiment of the present invention, the air required for the pyrolysis gasifier 1 and the gas boiler 6 may be air from the space of the waste storage warehouse.
As shown in figure 1, the utility model relates to a municipal solid waste pyrolysis gasification power generation method, the municipal solid waste after the breakage gets into the fluidized bed of pyrolysis gasifier 1 lower part, takes place the pyrolytic reaction after mixing with the quartz sand or the silicon carbide granule bed material of the high temperature in pyrolysis gasifier 1, and the pyrolysis generates semicoke and pyrolysis gas. Steam and air introduced from the lower part of the pyrolysis gasification furnace 1 pass through the air chamber and the air distribution plate and then contact with semicoke formed by garbage pyrolysis, the semicoke reacts with the steam and the air to generate ash and gasified gas, the ash is discharged from a solid outlet at the lower part of the pyrolysis gasification furnace 1 and enters the slag cooler 8, the gasified gas and the pyrolyzed gas are discharged from a gas inlet at the upper part of the pyrolysis gasification furnace 1 and enter the cyclone separator 3, fly ash carried by the gasified gas and the pyrolyzed gas is collected by the cyclone separator 3, the fly ash is discharged from a solid outlet at the lower part of the cyclone separator 3 and enters the slag cooler 8, and the ash and the fly ash are discharged after being cooled in the slag cooler 8.
Gas is discharged from a gas outlet at the top of the cyclone separator 3 and enters a spray tower 4, the gas is washed and cooled by water sprayed by the spray tower 4, water vapor in the gas is condensed into water, the water and excessive spray water enter a settling tank 5 from the bottom of the spray tower 4, and the sprayed gas enters a gas-fired boiler 6. And water on the lower layer of the extraction settling tank 5 is sent to the top of the spray tower 4 for spraying gas, and water on the upper layer of the extraction settling tank 5 is sent to the gas-fired boiler 6. The gas sent into the gas boiler 6 is mixed with air and then combusted, harmful substances in water from the settling tank 5 are completely combusted, the generated flue gas enters a flue gas treatment system 7, and after denitration, desulfurization, dust removal and other treatment, the flue gas is discharged into the atmosphere.
Water from a power generation system 9 enters a slag cooler 8, the water is heated by using heat of ash and fly ash and then enters a jacket 2, semicoke reacts with steam and air in a pyrolysis gasifier 1 to release heat, a part of the heat is used for heating bed materials for garbage pyrolysis, the rest of the heat is used for heating water in the jacket 2, the water in the jacket 2 is heated and then vaporized to generate steam, the steam is discharged from a steam outlet at the upper part of the jacket 2, a part of the steam is sent to the lower part of the pyrolysis gasifier 1 and sent into a furnace through an air chamber and an air distribution plate for garbage pyrolysis gasification, the rest of the steam is sent to a steam inlet of a gas boiler 6, and the steam heated by the gas boiler 6 is discharged from a steam outlet of the gas boiler 6 and enters a steam inlet of the power generation system 9 for power generation of the power generation system 9.
It should be noted that the above-mentioned embodiments are only for illustrating the technical idea and features of the present invention, and the specific implementation methods, such as the operation form of the pyrolysis gasifier 1, the type of bed material in the pyrolysis gasifier 1, the type of the garbage pyrolysis semicoke incineration boiler 6 and the slag cooler 8, etc., can be modified and improved without departing from the scope and the basic spirit of the present invention defined in the claims.
Claims (5)
1. The urban domestic garbage pyrolysis gasification power generation system is characterized by comprising a pyrolysis gasification furnace (1), a cyclone separator (3), a spray tower (4), a settling tank (5), a gas boiler (6), a slag cooler (8) and a power generation system (9), wherein a jacket (2) is arranged outside the pyrolysis gasification furnace (1), a gas outlet at the upper part of the pyrolysis gasification furnace (1) is communicated with an inlet of the cyclone separator (3), a solid outlet at the lower part of the pyrolysis gasification furnace (1) is communicated with the slag cooler (8), a gas outlet of the cyclone separator (3) is communicated with a gas inlet of the spray tower (4), a solid outlet of the cyclone separator (3) is communicated with the slag cooler (8), a gas outlet of the spray tower (4) is communicated with a gas inlet of the gas boiler (6), a liquid outlet of the spray tower (4) is communicated with the settling tank (5), an upper outlet of the settling tank (5) is communicated with the gas-fired boiler (6), a lower outlet of the settling tank (5) is communicated with a liquid inlet of the spray tower (4), a water outlet of the power generation system (9) is communicated with a water supply inlet of the slag cooler (8), a water outlet of the slag cooler (8) is communicated with a water supply inlet of the jacket (2), a steam outlet of the jacket (2) is communicated with a steam inlet of the gas-fired boiler (6) and a steam inlet of the lower part of the pyrolysis gasification furnace (1), and a steam outlet of the gas-fired boiler (6) is communicated with a steam inlet of the power generation system (9).
2. The system for generating electricity by pyrolyzing and gasifying municipal solid waste according to claim 1, wherein the outlet of the gas boiler (6) is communicated with a flue gas treatment system (7), the outlet of the flue gas treatment system (7) is communicated with the atmosphere, and tail gas is directly vented.
3. The system for generating power by pyrolyzing and gasifying municipal solid waste according to claim 1, wherein the lower part of the pyrolysis and gasification furnace (1) operates in a fluidized bed mode, the upper part operates in a riser mode, and the bottom part is provided with an air chamber and an air distribution plate.
4. The municipal solid waste pyrolysis gasification power generation system according to claim 1, wherein the lower part of the pyrolysis gasifier (1) is filled with quartz sand or silicon carbide particles as bed material, and when the bed material is reduced, part of the bed material needs to be supplemented or part of ash needs to be returned to the pyrolysis gasifier as bed material.
5. The municipal solid waste pyrolysis gasification power generation system according to claim 1, wherein the air required for the pyrolysis gasifier (1) and the gas boiler (6) is from the air in the waste storage space.
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| CN201921891598.2U CN210891664U (en) | 2019-11-05 | 2019-11-05 | Urban domestic garbage pyrolysis gasification power generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715303A (en) * | 2019-11-05 | 2020-01-21 | 西安热工研究院有限公司 | Urban household garbage pyrolysis gasification power generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715303A (en) * | 2019-11-05 | 2020-01-21 | 西安热工研究院有限公司 | Urban household garbage pyrolysis gasification power generation system and method |
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