CN214664447U - System for pulverized coal boiler co-burns refuse derived fuel - Google Patents
System for pulverized coal boiler co-burns refuse derived fuel Download PDFInfo
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- CN214664447U CN214664447U CN202120132078.4U CN202120132078U CN214664447U CN 214664447 U CN214664447 U CN 214664447U CN 202120132078 U CN202120132078 U CN 202120132078U CN 214664447 U CN214664447 U CN 214664447U
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- derived fuel
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- refuse derived
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- 239000003473 refuse derived fuel Substances 0.000 title claims abstract description 342
- 239000003245 coal Substances 0.000 title claims abstract description 131
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 86
- 239000000047 product Substances 0.000 claims description 49
- 229910052742 iron Inorganic materials 0.000 claims description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 41
- 239000003546 flue gas Substances 0.000 claims description 41
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 25
- 239000011265 semifinished product Substances 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 13
- 238000004056 waste incineration Methods 0.000 abstract description 40
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 16
- 239000010813 municipal solid waste Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 32
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 32
- 239000000446 fuel Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000000779 smoke Substances 0.000 description 12
- 230000010354 integration Effects 0.000 description 11
- 239000002699 waste material Substances 0.000 description 11
- 239000002956 ash Substances 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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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
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- Combustion Of Fluid Fuel (AREA)
- Air Supply (AREA)
Abstract
The utility model discloses a pulverized coal boiler mixes system of burning refuse derived fuel, including refuse derived fuel pretreatment systems, refuse derived fuel finished product storage pit, A band conveyer, refuse derived fuel transfer device, pulverized coal boiler and air heating system, refuse derived fuel pretreatment systems and refuse derived fuel finished product storage pit are connected, and refuse derived fuel finished product storage pit is connected with refuse derived fuel transfer device through A band conveyer, and refuse derived fuel transfer device is connected with pulverized coal boiler, and air heating system is connected with refuse derived fuel transfer device. The utility model is upgraded and reformed on the existing garbage incinerator unit, the structure is simple and reasonable, the temperature of the hearth can reach over 1200 ℃, dioxin can be completely decomposed, and the ultra-low emission of pollutants can be realized; the 'proximity effect' is reduced, and the environment of the people is improved; greatly reduces the investment of newly built waste incineration plants.
Description
Technical Field
The utility model relates to a pulverized coal boiler mixes system of burning refuse derived fuel belongs to solid waste treatment technical field.
Background
Along with the rapid development of the socioeconomic rapid progress of China and the rapid improvement of the living standard of people, the garbage generated in the urban production and living process is rapidly increased, and the domestic garbage occupies land, pollutes the environment and has more obvious influence on the health of people. The increasing of the amount of municipal domestic waste makes the waste treatment more and more difficult, and the problems of environmental pollution and the like caused by the increase gradually draw wide attention from all the world of society, so that a waste resource utilization technology suitable for the national conditions should be sought. Various waste incineration projects are built in most major cities in China, but with the increasing amount of waste, the waste disposal capacity of the existing waste incineration projects is obviously insufficient. At present, in some small and medium-sized cities, landfill is mainly used, and the phenomenon of 'refuse enclosing city' is very severe, so that the living environment of people is greatly influenced, even the physical health of people is threatened, and the risk of diseases is increased.
The existing traditional garbage incineration adopts a grate furnace or a circulating fluidized bed garbage incinerator, but the hearth temperature of the grate furnace and the circulating fluidized bed garbage incinerator is lower, so that dioxin generated in the garbage incineration process cannot be thoroughly eliminated. Meanwhile, the 'adjacency effect' of the newly-built waste incineration power plant is outstanding, and the site selection of the waste incineration power plant is difficult.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pulverized coal boiler mixes system of burning refuse derived fuel, the utility model discloses upgrading the transformation on current msw incineration unit, simple structure is reasonable, and the equipment integrated level is high, easy operation and operation are reliable, have solved the difficult problem in msw incineration power plant site selection, have still saved the investment cost of newly-built msw incineration unit.
In order to solve the technical problem, the utility model discloses a following technical scheme: a pulverized coal boiler co-combustion refuse derived fuel system comprises a refuse derived fuel pretreatment system, a refuse derived fuel finished product storage pit, an A belt conveyor, a refuse derived fuel transfer device, a pulverized coal boiler and an air heating system, wherein the refuse derived fuel pretreatment system is connected with the refuse derived fuel finished product storage pit, the refuse derived fuel finished product storage pit is connected with the refuse derived fuel transfer device through the A belt conveyor, the refuse derived fuel transfer device is connected with the pulverized coal boiler, and the air heating system is connected with the refuse derived fuel transfer device; the upgrading and transformation are carried out on the existing waste incineration unit, the structure is simple and reasonable, the equipment integration level is high, the operation is simple, and the operation is reliable, so that the problem of difficult site selection of a waste incineration power plant is solved, and the investment cost of a newly-built waste incineration unit is also saved.
The system for blending combustion of the refuse derived fuel in the pulverized coal fired boiler comprises a refuse derived fuel transport vehicle, a refuse derived fuel semi-finished product storage pit, a refuse derived fuel fine crusher, an iron removal device and a belt conveyor B, wherein the refuse derived fuel semi-finished product storage pit is connected with the refuse derived fuel fine crusher through the belt conveyor B; the method has the advantages that the refuse derived fuel is crushed and deironing is performed, and the working efficiency of a system for co-burning the refuse derived fuel in the pulverized coal boiler is improved.
According to the system for blending combustion of the refuse derived fuel in the pulverized coal boiler, the iron removal device 1 comprises an iron remover and a C belt conveyor, and the iron remover is arranged above the C belt conveyor.
According to the system for blending combustion of the refuse derived fuel in the pulverized coal fired boiler, the refuse derived fuel transfer device comprises a refuse derived fuel storage bin and a pneumatic conveying device, an outlet in the bottom of the refuse derived fuel storage bin is connected with a feed inlet of the pneumatic conveying device, a gas conveying pipe is arranged on the left side of the pneumatic conveying device, a venturi pipe is arranged on the right side of the pneumatic conveying device, and gas in the gas conveying pipe is hot air, cold air, compressed air or steam.
The pulverized coal boiler comprises a plurality of layers of pulverized coal burners, a garbage derived fuel burner and a boiler body, wherein the plurality of layers of pulverized coal burners and the garbage derived fuel burner are both arranged on the boiler body, the garbage derived fuel burner is arranged between any two adjacent layers of pulverized coal burners, and the garbage derived fuel burner is connected with a Venturi tube; the refuse derived fuel burner is arranged between any two adjacent layers of pulverized coal burners, so that the refuse derived fuel stays in a hearth of the boiler body, the complete decomposition of products can be ensured, and the content of dioxin in flue gas is effectively reduced.
According to the system for blending and burning the refuse derived fuel in the pulverized coal boiler, the bottom of the pulverized coal boiler is provided with the ash cooling bucket, the pulverized coal boiler is provided with the tail flue, the lower outlet of the tail flue is provided with the low-temperature smoke port, and an A air preheater is arranged between the tail flue and the low-temperature smoke port; the air preheater A cools the high-temperature flue gas in the tail flue to generate low-temperature flue gas, and the low-temperature flue gas is discharged through the low-temperature flue gas port, so that the regeneration of dioxin is effectively avoided.
The air heating system comprises a blower and a cold air pipeline, wherein an outlet of the blower is connected with an inlet of the cold air pipeline, an air preheater B is arranged on the cold air pipeline, a hot air main pipe is arranged at an outlet of the cold air pipeline, and a hot air branch pipe A is arranged at an outlet of the hot air main pipe; and the air preheater heats the air in the cold air pipeline and then enters the hot air main pipe, so that the working efficiency of the system for co-combusting the refuse derived fuel in the pulverized coal boiler is improved.
According to the system for blending combustion of the refuse derived fuel in the pulverized coal fired boiler, the air inlet of the gas conveying pipe is provided with the hot air branch pipe B, one end of the hot air branch pipe B is connected with the air inlet of the gas conveying pipe, and the other end of the hot air branch pipe B is connected to the pipe section between the hot air main pipe and the hot air branch pipe A; and the hot air in the hot air branch pipe B enters the pneumatic conveying device through the air conveying pipe, and the hot air is used as power gas to blow the refuse derived fuel into a hearth of the boiler body for combustion.
In the system for blending combustion of the refuse derived fuel in the pulverized coal fired boiler, the temperature of the hearth of the boiler body is 1200-1700 ℃.
Compared with the prior art, the utility model discloses a refuse derived fuel pretreatment systems, refuse derived fuel finished product pit, A band conveyer, refuse derived fuel transfer device, pulverized coal boiler and air heating system, refuse derived fuel pretreatment systems and refuse derived fuel finished product pit are connected, and refuse derived fuel finished product pit is connected with refuse derived fuel transfer device through A band conveyer, and refuse derived fuel transfer device is connected with pulverized coal boiler, and air heating system and refuse derived fuel transfer device are connected, the utility model discloses upgrading the transformation on current waste incineration unit, simple structure is reasonable, and furnace temperature can reach more than 1200 ℃, and dioxin can decompose completely, and boiler afterbody flue has still been equipped with complete air heating system, can realize the ultralow emission of pollutant; the consumption of fossil energy such as coal and the like can be reduced after the garbage derived fuel is blended and burned; the 'neighbor effect' is reduced, the 'neighbor effect' is improved by adopting the coupling co-combustion of the traditional coal-fired power plant, the civil environment is improved, and the living environment of residents is improved; the cost is saved, the investment of newly-built waste incineration plants is greatly reduced, and the future survival and development space of the urban coal-fired power plant is expanded.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1-refuse derived fuel pretreatment system, 2-refuse derived fuel finished product storage pit, 3-A belt conveyor, 4-refuse derived fuel transfer device, 5-pulverized coal boiler, 6-air heating system, 7-refuse derived fuel transport vehicle, 8-refuse derived fuel semi-finished product storage pit, 9-refuse derived fuel fine crusher, 10-deironing device, 11-B belt conveyor, 12-deironing device, 13-C belt conveyor, 14-refuse derived fuel storage bin, 15-pneumatic conveying device, 16-gas conveying pipe, 17-venturi pipe, 18-pulverized coal burner, 19-refuse derived fuel burner, 20-boiler body, 21-cold ash bucket, 22-tail flue, 23-low temperature flue gas port, the system comprises a 24-A air preheater, a 25-blower, a 26-cold air pipeline, a 27-B air preheater, a 28-hot air main pipe, a 29-A hot air branch pipe and a 30-B hot air branch pipe.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
Embodiment 1 of the utility model: a pulverized coal boiler co-combustion refuse derived fuel system comprises a refuse derived fuel pretreatment system 1, a refuse derived fuel finished product storage pit 2, an A belt conveyor 3, a refuse derived fuel transfer device 4, a pulverized coal boiler 5 and an air heating system 6, wherein the refuse derived fuel pretreatment system 1 is connected with the refuse derived fuel finished product storage pit 2, the refuse derived fuel finished product storage pit 2 is connected with the refuse derived fuel transfer device 4 through the A belt conveyor 3, the refuse derived fuel transfer device 4 is connected with the pulverized coal boiler 5, and the air heating system 6 is connected with the refuse derived fuel transfer device 4; the upgrading and transformation are carried out on the existing waste incineration unit, the structure is simple and reasonable, the equipment integration level is high, the operation is simple, and the operation is reliable, so that the problem of difficult site selection of a waste incineration power plant is solved, and the investment cost of a newly-built waste incineration unit is also saved.
The utility model discloses a theory of operation of embodiment: when the utility model works, the refuse derived fuel in the original refuse derived fuel transport vehicle 7 is unloaded to the refuse derived fuel semi-finished product storage pit 8, and the original refuse derived fuel in the refuse derived fuel semi-finished product storage pit 8 is conveyed to the refuse derived fuel fine crusher 9 through the B belt conveyor 11; the refuse derived fuel fine crusher 9 crushes the raw refuse derived fuel to obtain A refuse derived fuel; conveying the refuse derived fuel A to a belt conveyor 13C, and carrying out iron removal treatment on the broken refuse derived fuel by an iron remover 12 to obtain refuse derived fuel B; the B waste fuel falls into a waste fuel finished product storage pit 2, and the B waste fuel in the waste fuel finished product storage pit 2 is conveyed to a waste fuel storage bin 14 through an A belt conveyor 3; the refuse derived fuel B in the refuse derived fuel storage bin 14 falls into the pneumatic conveying device 15; the blower 25 delivers air to a cold air duct 26, the air in the cold air duct 26 is heated by a B air preheater 27 and sequentially enters the gas delivery pipe 16 through a hot air main pipe 28 and a B hot air branch pipe 30; the heated air in the air conveying pipe 16 enters the pneumatic conveying device 15, and the B waste fuel enters the waste fuel burner 19 through the venturi pipe 17 under the carrying action of the pneumatic conveying device 15; the garbage derived fuel burner 19 sends the B garbage derived fuel into the hearth of the boiler body 20 to be burnt with the pulverized coal in the hearth of the boiler body 20 to form high-temperature flue gas, fly ash and slag, the residence time of the high-temperature flue gas in the hearth of the boiler body 20 is at least 2s, the fly ash leaves the hearth along with the flue gas, and the slag falls into a cold ash hopper 21; the tail flue 22 further reduces the temperature of the high-temperature flue gas generated by combustion in the furnace of the boiler body 20 after passing through the air preheater 24A, so as to obtain low-temperature flue gas, and finally the low-temperature flue gas is discharged out of the furnace of the boiler body 20 through the low-temperature flue gas port 23.
Claims (9)
1. The pulverized coal boiler refuse-derived fuel blending combustion system is characterized by comprising a refuse-derived fuel pretreatment system (1), a refuse-derived fuel finished product storage pit (2), an A belt conveyor (3), a refuse-derived fuel transfer device (4), a pulverized coal boiler (5) and an air heating system (6), wherein the refuse-derived fuel pretreatment system (1) is connected with the refuse-derived fuel finished product storage pit (2), the refuse-derived fuel finished product storage pit (2) is connected with the refuse-derived fuel transfer device (4) through the A belt conveyor (3), the refuse-derived fuel transfer device (4) is connected with the pulverized coal boiler (5), and the air heating system (6) is connected with the refuse-derived fuel transfer device (4).
2. The pulverized coal fired boiler refuse-derived fuel blending system according to claim 1, wherein the refuse-derived fuel pretreatment system (1) comprises a refuse-derived fuel transport vehicle (7), a refuse-derived fuel semi-finished product storage pit (8), a refuse-derived fuel fine crusher (9), an iron removal device (10) and a B belt conveyor (11), and the refuse-derived fuel semi-finished product storage pit (8) is connected with the refuse-derived fuel fine crusher (9) through the B belt conveyor (11).
3. The pulverized coal fired boiler co-combustion refuse derived fuel system according to claim 2, characterized in that said iron removal device (10) comprises an iron remover (12) and a C belt conveyor (13), the iron remover (12) being disposed above the C belt conveyor (13).
4. The pulverized coal fired boiler refuse-derived fuel blending system according to claim 1, wherein the refuse-derived fuel transfer device (4) comprises a refuse-derived fuel storage bin (14) and a pneumatic conveying device (15), a bottom outlet of the refuse-derived fuel storage bin (14) is connected with a feed inlet of the pneumatic conveying device (15), a gas conveying pipe (16) is arranged on the left side of the pneumatic conveying device (15), a venturi tube (17) is arranged on the right side of the pneumatic conveying device (15), and gas in the gas conveying pipe (16) is hot air, cold air, compressed air or steam.
5. The pulverized coal boiler refuse-derived fuel blending system according to claim 4, characterized in that the pulverized coal boiler (5) comprises a multi-layer pulverized coal burner (18), a refuse-derived fuel burner (19) and a boiler body (20), wherein both the multi-layer pulverized coal burner (18) and the refuse-derived fuel burner (19) are arranged on the boiler body (20), the refuse-derived fuel burner (19) is arranged between any two adjacent layers of pulverized coal burners (18), and the refuse-derived fuel burner (19) is connected with the venturi tube (17).
6. The pulverized coal boiler refuse-derived fuel blending system according to any one of claims 1 or 5, wherein a cold ash hopper (21) is arranged at the bottom of the pulverized coal boiler (5), a tail flue (22) is arranged on the pulverized coal boiler (5), a low-temperature flue gas port (23) is arranged at the lower outlet of the tail flue (22), and an A air preheater (24) is arranged between the tail flue (22) and the low-temperature flue gas port (23).
7. The pulverized coal fired boiler refuse-derived fuel blending system according to claim 4, characterized in that the air heating system (6) comprises a blower (25) and a cold air duct (26), an outlet of the blower (25) is connected with an inlet of the cold air duct (26), the cold air duct (26) is provided with a B air preheater (27), an outlet of the cold air duct (26) is provided with a hot air main pipe (28), and an outlet of the hot air main pipe (28) is provided with an A hot air branch pipe (29).
8. The pulverized coal fired boiler refuse-derived fuel blending system according to claim 7, wherein a hot air branch pipe B (30) is arranged at an air inlet of the gas delivery pipe (16), one end of the hot air branch pipe B (30) is connected with the air inlet of the gas delivery pipe (16), and the other end of the hot air branch pipe B (30) is connected to a pipe section between the hot air main pipe (28) and the hot air branch pipe A (29).
9. The pulverized coal fired boiler co-combustion refuse derived fuel system as in claim 5, wherein the furnace temperature of said boiler body (20) is 1200-1700 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120132078.4U CN214664447U (en) | 2021-01-18 | 2021-01-18 | System for pulverized coal boiler co-burns refuse derived fuel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120132078.4U CN214664447U (en) | 2021-01-18 | 2021-01-18 | System for pulverized coal boiler co-burns refuse derived fuel |
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| Publication Number | Publication Date |
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| CN214664447U true CN214664447U (en) | 2021-11-09 |
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| CN202120132078.4U Active CN214664447U (en) | 2021-01-18 | 2021-01-18 | System for pulverized coal boiler co-burns refuse derived fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781054A (en) * | 2021-01-18 | 2021-05-11 | 中国华电科工集团有限公司 | System for pulverized coal boiler to mix and burn refuse derived fuel and operation method thereof |
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2021
- 2021-01-18 CN CN202120132078.4U patent/CN214664447U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781054A (en) * | 2021-01-18 | 2021-05-11 | 中国华电科工集团有限公司 | System for pulverized coal boiler to mix and burn refuse derived fuel and operation method thereof |
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