CN111365728A - Garbage and biomass coupling power generation system and method - Google Patents
Garbage and biomass coupling power generation system and method Download PDFInfo
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- CN111365728A CN111365728A CN202010286604.2A CN202010286604A CN111365728A CN 111365728 A CN111365728 A CN 111365728A CN 202010286604 A CN202010286604 A CN 202010286604A CN 111365728 A CN111365728 A CN 111365728A
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- flue gas
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- cyclone separator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/26—Multiple arrangement thereof for series flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a garbage and biomass coupling power generation system and a method, wherein an outlet of a drying granulator is communicated with an inlet of a first-stage cyclone separator, a flue gas outlet of the first-stage cyclone separator is communicated with a flue gas side inlet of a horizontal cyclone furnace, a flue gas side outlet of the horizontal cyclone furnace is communicated with an inlet of a second-stage cyclone separator, an outlet of the second-stage cyclone separator is communicated with a flue gas side inlet of an air preheater, a flue gas side outlet of the air preheater is communicated with an inlet of an induced draft fan, an outlet of the induced draft fan is communicated with a flue gas inlet of the drying granulator and a flue gas inlet of a coal-fired unit power plant boiler, an outlet of a blower is communicated with an air side inlet of the air preheater, an air side outlet of the air preheater is communicated with an air side inlet, the system and the method can burn the garbage and the biomass, and simultaneously realize the coupling of the garbage burning power generation system and the conventional coal-fired power generation system.
Description
Technical Field
The invention belongs to the technical field of municipal solid waste disposal and biomass utilization, and relates to a waste and biomass coupling power generation system and method.
Background
With the rapid development of economy and the increasing improvement of the national living standard, the dilemma of the 'garbage enclosing city' is increasingly prominent, and how to treat large quantities of domestic garbage becomes one of the serious problems faced by China at present. The domestic garbage treatment mode has three types: direct incineration, sanitary landfill and compost, the landfill is the main garbage disposal method in China at present, soil pollution, underground water pollution and surrounding atmospheric environment pollution are easily caused, and the direct incineration gradually becomes the mainstream mode of domestic garbage disposal in China compared with the landfill which easily causes secondary pollution and the garbage compost which is difficult to sell. In the waste incineration process, a large amount of heat can be generated, the part of heat is used for power generation, and waste heat recovery and resource maximum use can be realized. Therefore, the waste incineration power generation system is coupled with the conventional coal-fired power generation system, the high-efficiency utilization of heat generated by waste incineration is expected to be realized, and the problem that the efficiency of a waste incineration power plant is low is solved, so that the prior art has no case for waste and biomass incineration power generation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a garbage and biomass coupling power generation system and a method, which can incinerate garbage and biomass and simultaneously realize the coupling of a garbage incineration power generation system and a conventional coal-fired power generation system.
In order to achieve the aim, the garbage and biomass coupling power generation system comprises a coal-fired unit power station boiler, a drying granulator, a first-stage cyclone separator, a horizontal cyclone furnace, a second-stage cyclone separator, an air preheater, a blower and an induced draft fan;
the garbage conveying pipeline, the biomass conveying pipeline and the raw coal conveying pipeline are communicated with an inlet of the drying granulator, an outlet of the drying granulator is communicated with an inlet of the first-stage cyclone separator, a smoke outlet of the first-stage cyclone separator is communicated with a smoke side inlet of the horizontal cyclone furnace, a smoke side outlet of the horizontal cyclone furnace is communicated with an inlet of the second-stage cyclone separator, an outlet of the second-stage cyclone separator is communicated with a smoke side inlet of the air preheater, a smoke side outlet of the air preheater is communicated with an inlet of the induced draft fan, an outlet of the induced draft fan is communicated with a smoke inlet of the drying granulator and a smoke inlet of the coal-fired unit power station boiler, an outlet of the air feeder is communicated with an air side inlet of the air preheater, and an air side outlet of the air preheater is communicated with an air side inlet.
And a material outlet at the bottom of the first-stage cyclone separator is provided with a discharge spiral, and the material outlet at the bottom of the first-stage cyclone separator is communicated with an inlet of the drying granulator.
A first hot flue gas valve is arranged between the outlet of the induced draft fan and the flue gas inlet of the drying granulator.
And the outlet of the induced draft fan is communicated with the flue gas inlet of the coal-fired unit power station boiler through a second hot flue gas valve.
The garbage and biomass coupling power generation method comprises the following steps:
when the processed matter is garbage, feeding hot flue gas, garbage and raw coal into a drying granulator, grinding the garbage and the raw coal into particles in the drying granulator, drying the garbage by the hot flue gas, and feeding the dried garbage and the raw coal into a first-stage cyclone separator for rotary separation, wherein large particle substances separated out are discharged from the bottom of the first-stage cyclone separator and enter the drying granulator for continuous grinding, small particle substances separated out are fed into a horizontal cyclone furnace and are mixed with hot air fed by an air feeder for combustion, ash slag generated by combustion is discharged out of the horizontal cyclone furnace for harmless treatment, hot flue gas after combustion enters a second-stage cyclone separator for rotary separation and ash removal, wherein separated fly ash is fed into the horizontal cyclone furnace by the hot air, and finally forms molten harmless ash slag; the hot flue gas after ash removal enters an air preheater for heat exchange, and then is respectively sent into a drying granulator and a coal-fired unit power plant boiler through a draught fan for subsequent combustion;
when the treated biomass is biomass, the biomass and hot flue gas are sent into a drying granulator, the biomass is dried by the hot flue gas and then sent into a first-stage cyclone separator for rotary separation, wherein large granular substances separated out are discharged from the bottom of the first-stage cyclone separator and enter the drying granulator for continuous grinding, small granular substances separated out are sent into a horizontal cyclone furnace and are mixed with hot air heated by a blower and sent into an air preheater for combustion, ash generated by combustion is discharged out of the horizontal cyclone furnace and is treated as fertilizer, the hot flue gas after combustion enters a second-stage cyclone separator for rotary separation and ash removal, the hot flue gas after ash removal enters the air preheater for heat exchange, and then the hot flue gas after ash removal is respectively sent into the drying granulator through a draught fan and is sent into a coal-fired unit power station boiler for subsequent combustion.
The invention has the following beneficial effects:
the garbage and biomass coupling power generation system and the method realize qualified particle size screening and fly ash classification of a tobacco powder mixture based on a rotary separation technology during specific operation, specifically, the tobacco powder mixture output by a drying granulator is subjected to rotary separation through a first-stage cyclone separator arranged behind the drying granulator, wherein separated unqualified large-particle substances are returned to the drying granulator to be continuously ground until the particle size is qualified, and then the tobacco powder mixture is sent into a horizontal cyclone furnace. In addition, the invention is based on the characteristic that the ash of the garbage needs to be solidified, and the horizontal cyclone furnace is adopted for burning, so that the ash can be burnt to a molten state, and the subsequent harmless treatment is convenient. The working modes of the incineration system are switched according to different substances to be treated, the coupling of the waste incineration power generation system and a conventional coal-fired power generation system is realized, specifically, when the substances to be treated are waste, the waste is sent into a drying granulator and is ground into particles together with raw coal, the particles are dried by hot flue gas, a tobacco powder mixture is sent into a first-stage cyclone separator for rotary separation, the mixture with qualified particle size is sent into a horizontal cyclone furnace for combustion, ash residues generated by combustion are discharged out of the horizontal cyclone furnace for harmless treatment, and the hot flue gas after combustion is deashed is respectively sent into the drying granulator and is sent into a coal-fired unit power station boiler for subsequent combustion according to requirements; when the biomass is treated, the biomass is sent into a drying granulator without adding raw coal, the smoke powder mixture is sent into a first-stage cyclone separator for rotary separation after being dried by hot smoke, the mixture with qualified granularity is sent into a horizontal cyclone furnace, and ash generated by combustion is discharged out of the horizontal cyclone furnace and is treated independently as a fertilizer.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Wherein, 1 is a drying granulator, 2 is a discharge screw, 3 is a first-stage cyclone separator, 4 is a horizontal cyclone furnace, 5 is a second-stage cyclone separator, 6 is an air preheater, 7 is a blower, 8 is an induced draft fan, 9 is a first hot flue gas valve, and 10 is a second hot flue gas valve.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the garbage and biomass coupled power generation system of the present invention includes a coal-fired unit power plant boiler, a drying granulator 1, a first-stage cyclone separator 3, a horizontal cyclone furnace 4, a second-stage cyclone separator 5, an air preheater 6, a blower 7 and an induced draft fan 8; a waste conveying pipeline is arranged on the waste conveying pipeline, the biomass conveying pipeline and the raw coal conveying pipeline are communicated with an inlet of the drying granulator 1, an outlet of the drying granulator 1 is communicated with an inlet of the first-stage cyclone separator 3, a smoke outlet of the first-stage cyclone separator 3 is communicated with a smoke side inlet of the horizontal cyclone furnace 4, a smoke side outlet of the horizontal cyclone furnace 4 is communicated with an inlet of the second-stage cyclone separator 5, an outlet of the second-stage cyclone separator 5 is communicated with a smoke side inlet of the air preheater 6, a smoke side outlet of the air preheater 6 is communicated with an inlet of the induced draft fan 8, an outlet of the induced draft fan 8 is communicated with a smoke inlet of the drying granulator 1 and a smoke inlet of the coal-fired unit power station boiler, an outlet of the air blower 7 is communicated with an air side inlet of the air preheater 6, and an air side outlet of the air preheater 6 is communicated with an air side inlet of the.
A material outlet at the bottom of the first-stage cyclone separator 3 is provided with a discharge spiral 2, and the material outlet at the bottom of the first-stage cyclone separator 3 is communicated with an inlet of the drying granulator 1; a first hot flue gas valve 9 is arranged between the outlet of the induced draft fan 8 and the flue gas inlet of the drying granulator 1; the outlet of the induced draft fan 8 is communicated with the flue gas inlet of the coal-fired unit power station boiler through a second hot flue gas valve 10.
The garbage and biomass coupling power generation method comprises the following steps:
when the processed matter is garbage, feeding hot flue gas, garbage and raw coal into a drying granulator 1, grinding the garbage and the raw coal into particles in the drying granulator 1, drying the garbage by the hot flue gas, and feeding the dried garbage and the raw coal into a first-stage cyclone separator 3 for rotary separation, wherein large particle substances separated out are discharged from the bottom of the first-stage cyclone separator 3 and enter the drying granulator 1 for continuous grinding, small particle substances separated out are fed into a horizontal cyclone furnace 4 and are mixed with hot air fed by a blower 7 for combustion, ash generated by combustion is discharged from the horizontal cyclone furnace 4 for harmless treatment, hot flue gas after combustion enters a second-stage cyclone separator 5 for rotary separation and ash removal, wherein separated fly ash is fed into the horizontal cyclone furnace 4 by the hot air and finally forms molten harmless ash; the hot flue gas after ash removal enters an air preheater 6 for heat exchange, and then is respectively sent into a drying granulator 1 and a coal-fired unit power plant boiler through a draught fan 8 for subsequent combustion;
when the treated biomass is biomass, the biomass and hot flue gas are sent into a drying granulator 1, the biomass is dried by the hot flue gas and then sent into a first-stage cyclone separator 3 for rotary separation, wherein, the separated large particle substances are discharged from the bottom of the I-grade cyclone separator 3 and enter the drying granulator 1 for continuous grinding, the separated small particle substances are sent into the horizontal cyclone furnace 4, mixed with hot air which is sent into an air preheater 6 by a blower 7 and heated, and then combusted, ash slag generated by combustion is discharged out of the horizontal cyclone furnace 4, and treated as fertilizer, the hot flue gas after combustion enters a second-stage cyclone separator 5 for rotary separation and ash removal, the hot flue gas after ash removal enters an air preheater 6 for heat exchange, then the mixture is respectively sent into a drying granulator 1 and a coal-fired unit power plant boiler for subsequent combustion through a draught fan 8.
The system can effectively burn garbage and biomass, the generated heat is used for power generation, waste heat recovery and resource maximum use can be realized, and the garbage and biomass treatment system is coupled with a conventional coal-fired power generation system, so that the high-efficiency utilization of the heat generated by burning the garbage and biomass is realized. By utilizing the invention, not only can effective incineration of garbage and biomass be realized, but also the mode of the incineration system can be flexibly switched according to different substances to be treated, flexible and accurate control can be realized, the incineration product can be treated in a targeted manner, secondary pollution can not be caused, and the invention has important significance for realizing reduction, harmlessness, recycling and large-scale treatment of the garbage and the biomass.
Claims (5)
1. A garbage and biomass coupling power generation system is characterized by comprising a coal-fired unit power station boiler, a drying granulator (1), a first-stage cyclone separator (3), a horizontal cyclone furnace (4), a second-stage cyclone separator (5), an air preheater (6), a blower (7) and an induced draft fan (8);
the garbage conveying pipeline, the biomass conveying pipeline and the raw coal conveying pipeline are communicated with an inlet of a drying granulator (1), an outlet of the drying granulator (1) is communicated with an inlet of a first-stage cyclone separator (3), a flue gas outlet of the first-stage cyclone separator (3) is communicated with a flue gas side inlet of a horizontal cyclone furnace (4), a flue gas side outlet of the horizontal cyclone furnace (4) is communicated with an inlet of a second-stage cyclone separator (5), an outlet of the second-stage cyclone separator (5) is communicated with a flue gas side inlet of an air preheater (6), a flue gas side outlet of the air preheater (6) is communicated with an inlet of an induced draft fan (8), an outlet of the induced draft fan (8) is communicated with a flue gas inlet of the drying granulator (1) and a flue gas inlet of a coal-fired unit power plant boiler, an outlet of an air feeder (7) is communicated with an air side inlet of the air preheater (6), the air side outlet of the air preheater (6) is communicated with the air side inlet of the horizontal cyclone furnace (4).
2. The garbage and biomass coupled power generation system according to claim 1, wherein a material outlet at the bottom of the first-stage cyclone separator (3) is provided with a discharge screw (2), and the material outlet at the bottom of the first-stage cyclone separator (3) is communicated with an inlet of the drying granulator (1).
3. The garbage and biomass coupled power generation system according to claim 1, wherein a first hot flue gas valve (9) is arranged between the outlet of the induced draft fan (8) and the flue gas inlet of the drying granulator (1).
4. The coupled power generation system of garbage and biomass according to claim 1, characterized in that the outlet of the induced draft fan (8) is communicated with the flue gas inlet of the coal-fired unit power plant boiler through a second hot flue gas valve (10).
5. A garbage and biomass coupled power generation method is characterized in that the garbage and biomass coupled power generation system based on claim 1 comprises the following steps:
when the processed object is garbage, the hot flue gas, the garbage and the raw coal are sent into a drying granulator (1), the garbage and the raw coal are ground into granules in the drying granulator (1), meanwhile, the dried hot flue gas is sent into a first-stage cyclone separator (3) for rotary separation, wherein, the separated large particle substances are discharged from the bottom of the I-grade cyclone separator (3) and enter the drying granulator (1) for continuous grinding, the separated small particle substances are sent into the horizontal cyclone furnace (4), and is mixed with hot air sent by a blower (7) for combustion, ash generated by combustion is discharged out of the horizontal cyclone furnace (4) for harmless treatment, hot flue gas after combustion enters a second-level cyclone separator (5) for rotary separation and ash removal, wherein, the separated fly ash is sent into a horizontal cyclone furnace (4) through hot air, and finally forms molten harmless ash; the hot flue gas after ash removal enters an air preheater (6) for heat exchange, and then is respectively sent into a drying granulator (1) and a coal-fired unit power plant boiler for subsequent combustion through a draught fan (8);
when the treated biomass is biomass, the biomass and hot flue gas are sent into a drying granulator (1), the biomass is dried by hot flue gas and then sent into a first-stage cyclone separator (3) for rotary separation, wherein, the separated large particle substances are discharged from the bottom of the I-grade cyclone separator (3) and enter the drying granulator (1) for continuous grinding, the separated small particle substances are sent into the horizontal cyclone furnace (4), mixed with hot air which is sent into an air preheater (6) by a blower (7) and heated, and then combusted, ash slag generated by combustion is discharged out of the horizontal cyclone furnace (4), and treated as fertilizer, the hot flue gas after combustion enters a second-stage cyclone separator (5) for rotary separation and ash removal, the hot flue gas after ash removal enters an air preheater (6) for heat exchange, then the mixture is respectively sent into a drying granulator (1) and a coal-fired unit power station boiler for subsequent combustion through a draught fan (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010286604.2A CN111365728A (en) | 2020-04-13 | 2020-04-13 | Garbage and biomass coupling power generation system and method |
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| CN202010286604.2A CN111365728A (en) | 2020-04-13 | 2020-04-13 | Garbage and biomass coupling power generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115373442A (en) * | 2022-08-19 | 2022-11-22 | 苏州和青环境科技有限公司 | Low-temperature drying system for kitchen fine slag |
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2020
- 2020-04-13 CN CN202010286604.2A patent/CN111365728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115373442A (en) * | 2022-08-19 | 2022-11-22 | 苏州和青环境科技有限公司 | Low-temperature drying system for kitchen fine slag |
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