CN219044920U - Biomass gasification replaces natural gas system - Google Patents
Biomass gasification replaces natural gas system Download PDFInfo
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- CN219044920U CN219044920U CN202223021384.4U CN202223021384U CN219044920U CN 219044920 U CN219044920 U CN 219044920U CN 202223021384 U CN202223021384 U CN 202223021384U CN 219044920 U CN219044920 U CN 219044920U
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Abstract
The utility model provides a biomass gasification substitute natural gas system, wherein an outlet of a heat conduction oil heat exchanger is communicated with a high-temperature filter bag dust collector through a pipeline, an outlet of the high-temperature filter bag dust collector is communicated with an inlet of a fuel gas pressurizing fan through a pipeline, and an outlet of the fuel gas pressurizing fan is communicated with an inlet burner of an alumina roasting furnace through a pipeline. The fuel gas generated by biomass gasification is used for replacing the fuel gas generated by original coal gasification to be used as the fuel of the alumina roasting furnace, so that the carbon emission is reduced, and the implementation of the project promotes the realization of carbon reaching peaks and carbon neutralization targets.
Description
Technical Field
The utility model relates to a biomass gasification substitute natural gas system, and belongs to the technical field of biological natural gas.
Background
The biomass gasification technology is a technology that biomass is gasified in a circulating fluidized bed, generated fuel gas is sent into an alumina roasting furnace through a hot fuel gas conveying pipeline to be mixed and combusted with natural gas, the fuel gas generated by coal gasification or the natural gas is used as fuel in the prior art of the alumina roasting furnace, the coal gasification belongs to the national limit range, the cost of the natural gas is high, and the heat value of the fuel gas generated by biomass gasification is basically consistent with that of the coal gasification, so that the biomass gasification can replace coal gasification to be sent into the alumina roasting furnace to be combusted, and meanwhile, the fuel gas can replace the natural gas to be sent into the alumina roasting furnace to be combusted, and therefore, a biomass gasification system is required to be designed to solve the problems.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a biomass gasification substitute natural gas system so as to solve the problems in the background art, reduce the running cost of an alumina roasting furnace, achieve the aim of environmental protection emission requirements and improve the economic benefit of alumina production.
In order to achieve the above object, the present utility model is realized by the following technical scheme: the utility model provides a biomass gasification replaces natural gas system, includes the gasifier, the export of gasifier and cyclone's import intercommunication, cyclone's export and dust separator's import intercommunication, cyclone lower extreme intercommunication is provided with the loopback device, loopback device's export and gasifier right side lower extreme intercommunication, dust separator's export communicates with the import of conduction oil heat exchanger through the pipeline, the export of conduction oil heat exchanger communicates with high temperature filter bag dust remover through the pipeline, high temperature filter bag dust remover's export communicates with the import of gas booster fan, gas booster fan's export communicates with the import combustor of alumina roasting furnace through the pipeline.
Further, a stokehold bin is arranged on the left side of the gasifier, a first screw feeder is arranged at the lower end of the stokehold bin in a communicating way, and a discharge hole of the first screw feeder is communicated with the gasifier.
Further, the left side of the gasification furnace is provided with a sand bin, a bucket elevator is arranged on the sand bin, a second screw feeder is arranged at the lower end of the sand bin in a communicated mode, and a discharge hole of the second screw feeder is communicated with the gasification furnace through a pipeline.
Further, the lower end of the dust removal separator is communicated with a water-cooling spiral ash cooler, and an outlet of the water-cooling spiral ash cooler is communicated with an inlet of an ash bin through a pipeline.
Further, the gasification furnace is flexibly communicated with the cyclone separator through the first metal expansion joint, and the cyclone separator is flexibly communicated with the dust removal separator through the second metal expansion joint.
Further, an outlet of the heat conduction oil heat exchanger is communicated with an inlet of the high-temperature filter bag dust collector through a pipeline, and an outlet of the high-temperature filter bag dust collector is communicated with an inlet of the fuel gas booster fan through a pipeline.
Further, an outlet of the heat conduction oil heat exchanger is communicated with an inlet of the circulating oil pump, an outlet of the circulating oil pump is communicated with an inlet of the heat absorber, and an outlet of the heat absorber is communicated with an inlet of the heat conduction oil heat exchanger.
Further, the gasifier lower extreme is provided with many first steel columns that are used for supporting self weight, cyclone lower extreme is provided with many second steel columns that are used for supporting self weight, dust removal separator lower extreme is provided with many third steel columns that are used for supporting self weight.
Further, the lower end of the gasification furnace is communicated with an air chamber, and an ignition burner for ignition is arranged in an air duct of the air chamber.
Further, the lower end of the gasification furnace is communicated with a first slag discharging pipe, and the rear part of the return device is communicated with a second slag discharging pipe.
The utility model has the beneficial effects that: according to the biomass gasification substitute natural gas system, the temperature of fuel gas is reduced to about 400 ℃ by utilizing the heat transfer oil heat exchanger, dust is removed by the high Wen Lvdai dust remover, so that the dust content in the fuel gas is less than 5mg/Nm < 3 >, and the fuel gas is pressurized by the fuel gas pressurizing fan and then is sent into the alumina roasting furnace to be combusted, so that the fuel gas is used as fuel of the alumina roasting furnace instead of the natural gas, and the running cost is reduced.
The purpose of ash discharge operation of the gasification furnace is achieved through the combined action of the first slag discharge pipe, the second slag discharge pipe and the dust removal separator.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a biomass gasification alternative natural gas system according to the present utility model;
in the figure: 1-stokehold bin, 101-first screw feeder, 2-sand bin, 201-second screw feeder, 202-bucket elevator, 3-gasifier, 301-loop back device, 302-first metal expansion joint, 303-cyclone separator, 304-second metal expansion joint, 305-dust removal separator, 306-water cooling screw ash cooler, 4-heat conduction oil heat exchanger, 5-high temperature filter bag dust remover, 6-gas pressurized fan, 7-alumina roasting furnace, 8-ash bin, 9-plenum, 901-ignition burner, 902-first slag discharge pipe.
Description of the embodiments
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
Referring to fig. 1, the present utility model provides a technical solution: a biomass gasification substitute natural gas system comprises a gasification furnace 3, wherein the gasification furnace 3 adopts a high-temperature separation circulating fluidized bed and a gasification furnace 3 for burning biomass, a stokehold bin 1 is arranged on the left side of the gasification furnace 3, the stokehold bin 1 is used for storing raw materials, a first screw feeder 101 is arranged at the lower end of the stokehold bin 1 in a communicated manner, the first screw feeder 101 is used for uniformly feeding, a discharge hole of the first screw feeder 101 is communicated with the gasification furnace 3, a sand bin 2 is arranged on the left side of the gasification furnace 3, a bucket elevator 202 is arranged on the sand bin 2, a second screw feeder 201 is arranged at the lower end of the sand bin 2 in a communicated manner, the bucket elevator 202, the sand bin 2, the second screw feeder 201 and the like form an inert bed feeding device, the discharge hole of the second screw feeder 201 is communicated with the gasification furnace 3 through a pipeline, an air chamber 9 is arranged at the lower end of the gasification furnace 3 in a communicated manner, the air chamber 9 is used for controlling gasification air quantity, an ignition burner 901 for ignition is arranged in an air flue of the air chamber 9, a plurality of first steel columns for supporting self weight are arranged at the lower end of the gasification furnace 3, an outlet of the gasification furnace 3 is communicated with an inlet of the cyclone separator 303, the cyclone separator 303 is used for gas-solid separation, a plurality of second steel columns for supporting self weight are arranged at the lower end of the cyclone separator 303, an outlet of the cyclone separator 303 is communicated with an inlet of the dust separator 305, the dust separator 305 is used for separating solid particles in biomass gas, the quality of combustible gas is improved, a plurality of third steel columns for supporting self weight are arranged at the lower end of the dust separator 305, an outlet of the dust separator 305 is communicated with an inlet of the gas pressurizing fan 6, the gas pressurizing fan 6 is used for pressurizing the gas and then delivering the gas into a gas pipeline, the outlet of the gas pressurizing fan 6 is communicated with the inlet of the alumina roasting furnace 7 through a pipeline.
When the biomass gas gasification furnace is used, raw materials are firstly conveyed to a stokehold bin by a belt conveyor, then the raw materials in the stokehold bin 1 are uniformly led into a gasification furnace 3 by a first screw feeder 101, sand in a sand bin 2 is led into the gasification furnace 3 by a second screw feeder 201, then an ignition burner 901 is used for ignition, material particles, sand and gasifying agents are fully contacted and heated uniformly, the gasification furnace 3 is in a fluidized state, high-temperature gas entrains solid particles into a cyclone 303 to be subjected to gas-solid separation, gas from the cyclone 303 enters a dust separator 305, the dust separator 305 separates solid particles in biomass gas, gas generated by the gasification furnace 3 is pressurized by a gas pressurizing fan 6 and then is fed into a gas pipeline, and the gas is fed into the alumina roasting furnace 7 by a separate gas pipeline and is combusted in the alumina roasting furnace 7 by a branch pipe through a gas burner.
Referring to fig. 1, a gasification furnace 3 is flexibly connected with a cyclone 303 through a first metal expansion joint 302, the cyclone 303 is flexibly connected with a dust separator 305 through a second metal expansion joint 304, an outlet of the dust separator 305 is connected with an inlet of a heat-conducting oil heat exchanger 4 through a pipeline, the heat-conducting oil heat exchanger 4 is used for absorbing heat in high-temperature fuel gas discharged by a biomass gasification furnace, so as to reduce the temperature of the fuel gas, an outlet of the heat-conducting oil heat exchanger 4 is connected with an inlet of a circulating oil pump, an outlet of the circulating oil pump is connected with an inlet of a heat absorber, the heat absorber absorbs heat through condensed water, an outlet of the heat absorber is connected with an inlet of the heat-conducting oil heat exchanger 4, an outlet of the heat-conducting oil heat exchanger 4 is connected with an inlet of a high-temperature filter bag dust remover 5 through a pipeline, and an outlet of the high Wen Lvdai dust remover 5 is connected with an inlet of a fuel gas pressurizing fan 6 through a pipeline.
After the high-temperature fuel gas generated by the gasification furnace 3 enters the heat conduction oil heat exchanger 4, the heated high-temperature heat conduction oil is forcedly conveyed to the heat absorber by the pressure head of the circulating oil pump in a liquid phase state, the heat absorber absorbs heat through condensed water, after the heat energy is released by the high-temperature heat conduction oil at the heated end of the heat absorber, the high-temperature fuel gas continuously enters the heat conduction oil heat exchanger 4 along the loop tube side through the circulating pump, the high-temperature fuel gas is heated in the heat conduction oil heat exchanger 4 again and repeatedly, the purpose of continuous heat exchange is achieved, and when the temperature of the fuel gas is reduced to about 400 ℃, the fuel gas is pressurized by the fuel gas pressurizing fan 6 and then is conveyed into the alumina roasting furnace 7 for combustion.
Referring to fig. 1, a first slag discharging pipe 902 is disposed at the lower end of the gasifier 3, the first slag discharging pipe 902 is used for discharging ash in the gasifier 3, a returning device 301 is disposed at the lower end of the cyclone separator 303, the returning device 301 is made of t=8 steel plates, the returning device 301 is communicated with inlets of two roots fans, two high-pressure head small-flow air introduced by the two roots fans are respectively sent into a loosening air chamber and a fluidization air chamber to convey and adjust the recycling ash amount, the returning device 301 is used for forming an air seal of a connecting pipe under the separator, conveying and controlling recycling for bed temperature, an outlet of the returning device 301 is communicated with the right lower end of the gasifier 3, a second slag discharging pipe is disposed at the rear end of the returning device 301, the second slag discharging pipe is used for discharging ash in the returning device 301, a water-cooling spiral ash cooler 306 is disposed at the lower end of the dust separator 305, an outlet of the water-cooling spiral ash cooler 306 is communicated with an inlet of the ash bin 8 through a pipeline, and the ash bin 8 is used for recycling ash separated by the dust separator 305.
The first slag discharging pipe 902 discharges ash in the gasification furnace 3, the second slag discharging pipe discharges ash in the return device 301, the water-cooling spiral ash cooler 306 and the ash bin 8 collect and discharge ash separated by the dust removal separator 305, and the purpose of ash discharging operation of the gasification furnace 3 is achieved through the combined action of the first slag discharging pipe 902, the second slag discharging pipe and the dust removal separator 305.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A biomass gasification substitute natural gas system, characterized in that: including gasifier (3), the export of gasifier (3) communicates with the import of cyclone (303), the export of cyclone (303) communicates with the import of dust separator (305), cyclone (303) lower extreme intercommunication is provided with loopback device (301), the export of loopback device (301) communicates with gasifier (3) lower right end, the export of dust separator (305) communicates with the import of conduction oil heat exchanger (4) through the pipeline, the export of conduction oil heat exchanger (4) communicates with high temperature filter bag dust remover (5) through the pipeline, the export of high temperature filter bag dust remover communicates with the import of gas booster fan (6), the export of gas booster fan (6) communicates with the import of aluminium oxide roasting stove (7) through the pipeline.
2. A biomass gasification alternative natural gas system according to claim 1, wherein: the left side of gasifier (3) is provided with stokehold bin (1), stokehold bin (1) lower extreme intercommunication is provided with first screw feeder (101), the discharge gate and the gasifier (3) of first screw feeder (101) communicate.
3. A biomass gasification alternative natural gas system according to claim 1, wherein: the gasification furnace is characterized in that a sand bin (2) is arranged on the left side of the gasification furnace (3), a bucket elevator (202) is arranged on the sand bin (2), a second screw feeder (201) is arranged at the lower end of the sand bin (2) in a communicating mode, and a discharge hole of the second screw feeder (201) is communicated with the gasification furnace (3) through a pipeline.
4. A biomass gasification alternative natural gas system according to claim 1, wherein: the lower end of the dust removal separator (305) is communicated with a water-cooling spiral ash cooler (306), and an outlet of the water-cooling spiral ash cooler (306) is communicated with an inlet of the ash bin (8) through a pipeline.
5. A biomass gasification alternative natural gas system according to claim 1, wherein: the gasification furnace (3) is flexibly communicated with the cyclone separator (303) through a first metal expansion joint (302), and the cyclone separator (303) is flexibly communicated with the dust removal separator (305) through a second metal expansion joint (304).
6. A biomass gasification alternative natural gas system according to claim 1, wherein: the outlet of the heat conduction oil heat exchanger (4) is communicated with the inlet of the high-temperature filter bag dust collector (5) through a pipeline, and the outlet of the high-temperature filter bag dust collector (5) is communicated with the inlet of the fuel gas pressurizing fan (6) through a pipeline.
7. A biomass gasification alternative natural gas system according to claim 1, wherein: the outlet of the heat conduction oil heat exchanger (4) is communicated with the inlet of the circulating oil pump, the outlet of the circulating oil pump is communicated with the inlet of the heat absorber, and the outlet of the heat absorber is communicated with the inlet of the heat conduction oil heat exchanger (4).
8. A biomass gasification alternative natural gas system according to claim 1, wherein: the gasification furnace is characterized in that a plurality of first steel columns used for supporting self weight are arranged at the lower end of the gasification furnace (3), a plurality of second steel columns used for supporting self weight are arranged at the lower end of the cyclone separator (303), and a plurality of third steel columns used for supporting self weight are arranged at the lower end of the dust removal separator (305).
9. A biomass gasification alternative natural gas system according to claim 1, wherein: the gasification furnace is characterized in that an air chamber (9) is communicated with the lower end of the gasification furnace (3), and an ignition burner (901) for ignition is arranged in an air duct of the air chamber (9).
10. A biomass gasification alternative natural gas system according to claim 1, wherein: the gasification furnace (3) lower extreme intercommunication is provided with first scum pipe (902), loopback device (301) rear portion intercommunication is provided with the second scum pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223021384.4U CN219044920U (en) | 2022-11-11 | 2022-11-11 | Biomass gasification replaces natural gas system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223021384.4U CN219044920U (en) | 2022-11-11 | 2022-11-11 | Biomass gasification replaces natural gas system |
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| CN219044920U true CN219044920U (en) | 2023-05-19 |
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| CN202223021384.4U Active CN219044920U (en) | 2022-11-11 | 2022-11-11 | Biomass gasification replaces natural gas system |
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