CN212057277U - Biomass gas burner with heat storage combustion chamber - Google Patents

Biomass gas burner with heat storage combustion chamber Download PDF

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Publication number
CN212057277U
CN212057277U CN202020645178.2U CN202020645178U CN212057277U CN 212057277 U CN212057277 U CN 212057277U CN 202020645178 U CN202020645178 U CN 202020645178U CN 212057277 U CN212057277 U CN 212057277U
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China
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pipeline
combustion air
gas
sleeve
combustion
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CN202020645178.2U
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王一坤
刘辉
张广才
柳宏刚
解冰
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Boiler Environmental Protection Engineering Co Ltd
Huaneng Power International Inc
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Boiler Environmental Protection Engineering Co Ltd
Huaneng Power International Inc
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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 utility model discloses a biomass gas burner of area heat accumulation combustion chamber, including central wind pipeline, interior gas pipeline, interior combustion air pipeline, outer gas pipeline, outer combustion air pipeline, first sleeve, second sleeve, interior combustion air whirl adjusting pull rod, outer gas whirl adjusting pull rod, a plurality of interior combustion air axial whirl blades and a plurality of outer gas axial whirl blades, this combustor can reach the purpose of the high-efficient low pollution burning of biomass gas.

Description

Biomass gas burner with heat storage combustion chamber
Technical Field
The utility model belongs to the technical field of combustion apparatus, a biomass gas burner of area heat accumulation combustion chamber is related to.
Background
As the economic development of China enters a new normal state, the energy consumption acceleration is gradually slowed down, the problems of energy utilization efficiency and development quality are outstanding, the energy structure is diversified and developed, a clean, low-carbon, safe and efficient modern energy system is built, and the method is a great historical mission for energy development and reform. Therefore, the energy is saved, the available range of the energy is expanded, and the method is extremely important for the economic construction of China. The application of low-calorific-value fuel such as biomass gas improves the comprehensive utilization efficiency of energy, treats domestic production garbage and waste, and is beneficial to environmental purification and pollutant discharge control.
Low calorific value gas, typically less than 6.28MJ/m3The biomass pyrolysis process mainly generates CO and CH4、C2H2The calorific value of the combustible gas is about 4-6 MJ/m3Belongs to a conventional low-heating value fuel gas. The low-calorific-value gas is difficult to ignite and control in the traditional direct combustion mode, phenomena such as tempering and blow-out can occur in the combustion process, and the combustion of the low-calorific-value gas cannot be stably controlled, so that a clean and efficient novel biomass gas combustor is needed to be developed, the utilization efficiency of the biomass gas combustor is improved, and the energy utilization range is expanded.
In recent years, researchers in the combustion field are continuously exploring and researching to develop a series of high-efficiency clean combustion technologies of gas fuel, such as pulsation, catalysis, oxygen enrichment, high-temperature preheating and porous medium combustion technologies, and on the basis of the technologies, different types of gas burners, such as high-speed, oxygen enrichment, radiant tube burners and the like, are generated. As a novel combustion mode, the porous medium combustion technology can give consideration to high-efficiency combustion and low pollutant emission, and is favored by students in the combustion field of various countries. Due to the specific physical structure of the porous medium, the porous medium combustion technology has the advantages of high combustion rate and combustion strength, wide combustion area, uniform heat load distribution, high combustion efficiency, low pollutant discharge, small equipment volume, compact structure and the like. The porous medium combustion technology provides a new path for combustion utilization of biomass gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a biomass gas burner of area heat accumulation combustion chamber, this combustor can reach the high-efficient low purpose that pollutes the burning of biomass gas.
In order to achieve the above purpose, the biomass gas burner with the heat storage combustion chamber of the utility model comprises a central air pipeline, an inner gas pipeline, an inner combustion-supporting air pipeline, an outer gas pipeline, an outer combustion-supporting air pipeline, a first sleeve, a second sleeve, an inner combustion-supporting air rotational flow adjusting pull rod, an outer gas rotational flow adjusting pull rod, a plurality of inner combustion-supporting air axial rotational flow blades and a plurality of outer gas axial rotational flow blades;
the central air pipeline, the inner gas pipeline, the inner combustion-supporting air pipeline, the outer gas pipeline and the outer combustion-supporting air pipeline are sequentially distributed from inside to outside, and the outlet of the inner gas pipeline is filled with a ceramic foam type porous medium;
each inner combustion air axial swirl vane is arranged in an annular channel between the inner gas pipeline and the inner combustion air pipeline along the circumferential direction, one end of a first sleeve is connected with each inner combustion air axial swirl vane, the other end of the first sleeve is connected with one end of an inner combustion air swirl adjusting pull rod, and the other end of the inner combustion air swirl adjusting pull rod penetrates out of the annular channel between the inner combustion air pipeline and the inner gas pipeline;
each outer gas axial rotational flow blade is positioned in an annular channel between the inner combustion-supporting air pipeline and the outer gas pipeline, one end of the second sleeve is connected with each outer gas axial rotational flow blade, the other end of the second sleeve is connected with one end of the outer gas rotational flow adjusting pull rod, the other end of the outer gas rotational flow adjusting pull rod penetrates out of the annular channel between the inner combustion-supporting air pipeline and the outer gas pipeline, and an outer combustion-supporting air tangential rotational flow blade is arranged at an outer combustion-supporting air inlet of the outer gas pipeline.
The first sleeve is connected with the inner combustion-supporting air rotational flow adjusting pull rod through a first lug plate;
the second sleeve is connected with the outer gas swirl adjusting pull rod through a second lug plate.
The first sleeve and the second sleeve are coaxially arranged.
The ceramic foam type porous medium is made of alumina, silicon carbide or zirconia.
The utility model discloses following beneficial effect has:
take biomass gas burner of heat accumulation combustion chamber when concrete operation, adopt porous medium heat accumulation combustion mode and the hierarchical two accent wind whirl combustion mode of fuel to combine organically, the multiple high-efficient low pollution combustion mode of coupling to realize the high-efficient low purpose of polluting the burning of biomass gas. Specifically, low-calorific-value biomass gas is fed in through an inner gas pipeline and an outer gas pipeline in two stages, the biomass gas generates strong mixing disturbance in internal pores of a ceramic foam type porous medium in the combustion process, heat conduction and strong heat radiation are carried out through a porous medium framework after initial combustion to form heat backflow so as to preheat upstream biomass gas, a combustion reaction area is rapidly expanded, incomplete combustion heat loss of the biomass gas is reduced, the porous medium absorbs partial combustion heat and stores heat due to high specific heat capacity of the porous medium, internal radiation heat exchange is enhanced, initial combustion ignition heat is reduced, a stable ignition source is formed at a nozzle of the porous medium, the outer gas pipeline is axially fed, turbulence intensity of the gas is improved, and mixing and swirling flow of the biomass gas and high-temperature flue gas are facilitatedBurning; combustion-supporting air is fed in by stages through a central air pipeline, an inner combustion-supporting air pipeline and an outer combustion-supporting air pipeline, wherein the central air is direct current and mainly provides oxygen required in the initial stage of combustion, a backflow area formed by swirling combustion-supporting air can be expanded, the inner combustion-supporting air and the outer combustion-supporting air are respectively of an axial swirling air inlet and tangential swirling air inlet double-adjusting structure, a stable backflow area can be formed at a nozzle of a combustor, high-temperature smoke is refluxed to heat upstream biomass gas, and combustion efficiency is improved; the good heat exchange characteristic of the ceramic foam type porous medium enables the temperature gradient of a combustion area to be smooth, the average temperature of the combustion area to be relatively low, meanwhile, the air excess coefficient at the initial stage of combustion can be reduced by graded air supply, a nozzle of a combustor forms reducing atmosphere, and the NO is reduced by the combined action of the air excess coefficient and the reducing atmospherexThe aim of high-efficiency low-pollution combustion of the biomass gas is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Wherein, 1 is a central air pipeline, 2 is an inner gas pipeline, 3 is an inner combustion air pipeline, 4 is an outer gas pipeline, 5 is an outer combustion air pipeline, 6 is a ceramic foam type porous medium, 7 is an inner combustion air axial swirl blade, 8 is an outer combustion air axial swirl blade, 9 is an outer combustion air tangential swirl blade, 10 is an inner combustion air swirl adjusting pull rod, and 11 is an outer combustion air swirl adjusting pull rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the biomass gas burner with the thermal storage combustion chamber of the present invention includes a central air duct 1, an internal combustion air duct 2, an internal combustion air duct 3, an external combustion air duct 4, an external combustion air duct 5, a first sleeve, a second sleeve, an internal combustion air swirl adjusting pull rod 10, an external combustion air swirl adjusting pull rod 11, a plurality of internal combustion air axial swirl vanes 7 and a plurality of external combustion air axial swirl vanes 8; the central air pipeline 1, the internal combustion air pipeline 2, the internal combustion air pipeline 3, the external gas pipeline 4 and the external combustion air pipeline 5 are sequentially distributed from inside to outside, and the outlet of the internal gas pipeline 2 is filled with a ceramic foam type porous medium 6; each inner combustion air axial swirl vane 7 is circumferentially arranged in an annular channel between the inner gas pipeline 2 and the inner combustion air pipeline 3, one end of a first sleeve is connected with each inner combustion air axial swirl vane 7, the other end of the first sleeve is connected with one end of an inner combustion air swirl adjusting pull rod 10, and the other end of the inner combustion air swirl adjusting pull rod 10 penetrates out of the annular channel between the inner combustion air pipeline 3 and the inner gas pipeline 2; each outer gas axial swirl vane 8 is positioned in an annular channel between the inner combustion air pipeline 3 and the outer gas pipeline 4, one end of the second sleeve is connected with each outer gas axial swirl vane 8, the other end of the second sleeve is connected with one end of the outer gas swirl adjusting pull rod 11, the other end of the outer gas swirl adjusting pull rod 11 penetrates out of the annular channel between the inner combustion air pipeline 3 and the outer gas pipeline 4, and an outer combustion air tangential swirl vane 9 is arranged at an outer combustion air inlet of the outer gas pipeline 4.
The first sleeve is connected with the inner combustion-supporting air rotational flow adjusting pull rod 10 through a first lug plate; the second sleeve is connected with the outer gas swirl adjusting pull rod 11 through a second lug plate; the first sleeve and the second sleeve are coaxially arranged; the material of the ceramic foam type porous medium 6 is alumina, silicon carbide or zirconia.
The inside of the central air pipeline 1 is preheated direct-current combustion-supporting air which mainly provides oxygen required in the initial stage of combustion, and meanwhile, the central air can expand a reflux area formed by rotational-flow combustion-supporting air; be direct current living beings gas in interior gas pipeline 2, the exit of interior gas pipeline 2 is filled with ceramic foam type porous medium 6, living beings gas produces strong mixed disturbance in the inside hole of ceramic foam type porous medium 6, through porous medium skeleton heat conduction and strong heat radiation after the burning, form the heat backward flow, preheat upstream living beings gas, enlarge the combustion reaction district rapidly, reduce living beings gas incomplete combustion heat loss, ceramic foam type porous medium 6 is higher because its self specific heat capacity, absorb part burning heat and heat accumulation, the inside radiation heat transfer of pipeline has been strengthened, the initial stage ignition heat of burning has been reduced, be favorable to forming stable ignition source in combustor nozzle department(ii) a The outer gas pipeline 4 is axially cyclone-fed, the biomass gas rotates through the outer gas axial cyclone blades 8, the turbulence intensity of the biomass gas is improved, the mixing and combustion of the biomass gas and high-temperature flue gas are facilitated, and the cyclone intensity is adjusted by adjusting the front and rear positions of the cyclone through the outer gas cyclone adjusting pull rod 11; the rest combustion air is fed in by stages through an inner combustion air pipeline 3 and an outer combustion air pipeline 5, the inner combustion air and the outer combustion air are respectively of an axial and tangential rotational flow air inlet double air adjusting structure, a stable backflow area can be formed at a burner nozzle by the structure, backflow high-temperature flue gas heats upstream biomass gas, the combustion efficiency is improved, and the rotational flow strength is respectively adjusted by the position of an inner combustion air axial rotational flow blade 7 and the opening of an outer combustion air tangential rotational flow blade 9; the good heat exchange characteristic of the ceramic foam type porous medium 6 enables the temperature gradient of a combustion area to be smooth, the average temperature of the combustion area to be relatively low, meanwhile, the air excess coefficient at the initial stage of combustion can be reduced by graded air supply, the nozzle of the combustor forms and maintains a reducing atmosphere, and the NO can be reduced by the combined action of the twoxGenerating; the aim of high efficiency and low pollution of the biomass gas is achieved by organically combining a porous medium heat storage combustion mode and a fuel classification double-air regulation swirling flow combustion mode.
The utility model discloses low heat value living beings gas is difficult to burn under to traditional combustion mode, the shortcoming that pollutant discharge is high, can realize the purpose of the high-efficient low pollution burning of living beings gas, ceramic foam type porous medium 6 provides good condition for the initial stage mixed disturbance and the burning of low heat value living beings gas, its good heat transfer characteristic can reach the purpose of heat accumulation, improve the intensity of radiation heat transfer by a wide margin, the mode of the hierarchical bitonic wind whirl burning of fuel can form and maintain stable recirculation zone and reducing atmosphere at the combustor spout, be favorable to backward flow and NO of high temperature flue gasxThe utility model discloses to realizing the stable high-efficient low pollution burning of low calorific value living beings gas, enlarge the energy utilization scope and have the significance.

Claims (5)

1. A biomass gas burner with a heat accumulation combustion chamber is characterized by comprising a central air pipeline (1), an internal gas pipeline (2), an internal combustion air pipeline (3), an external gas pipeline (4), an external combustion air pipeline (5), a first sleeve, a second sleeve, an internal combustion air rotational flow adjusting pull rod (10), an external combustion air rotational flow adjusting pull rod (11), a plurality of internal combustion air axial rotational flow blades (7) and a plurality of external gas axial rotational flow blades (8);
the central air pipeline (1), the internal gas pipeline (2), the internal combustion air pipeline (3), the external gas pipeline (4) and the external combustion air pipeline (5) are sequentially distributed from inside to outside, and ceramic foam type porous media (6) are filled at an outlet of an annular channel formed by the internal gas pipeline (2) and the central air pipeline (1);
each inner combustion air axial swirl vane (7) is arranged in an annular channel between the inner gas pipeline (2) and the inner combustion air pipeline (3) along the circumferential direction, one end of a first sleeve is connected with each inner combustion air axial swirl vane (7), the other end of the first sleeve is connected with one end of an inner combustion air swirl adjusting pull rod (10), and the other end of the inner combustion air swirl adjusting pull rod (10) penetrates out of the annular channel between the inner combustion air pipeline (3) and the inner gas pipeline (2);
each outer gas axial swirl vane (8) is positioned in an annular channel between the inner combustion air pipeline (3) and the outer gas pipeline (4), one end of the second sleeve is connected with each outer gas axial swirl vane (8), the other end of the second sleeve is connected with one end of an outer gas swirl adjusting pull rod (11), the other end of the outer gas swirl adjusting pull rod (11) penetrates out of the annular channel between the inner combustion air pipeline (3) and the outer gas pipeline (4), and an outer combustion air tangential swirl vane (9) is arranged at an outer combustion air inlet of the outer gas pipeline (4).
2. The biomass gas burner with the regenerative combustion chamber according to claim 1, wherein the first sleeve is connected with the inner combustion air swirl adjusting pull rod (10) through a first lug plate.
3. The biomass gas burner with the regenerative combustion chamber according to claim 2, wherein the second sleeve is connected with the outer gas swirl adjusting rod (11) through a second lug plate.
4. The biomass gas burner with the regenerative combustion chamber according to claim 1, wherein the first sleeve and the second sleeve are coaxially arranged.
5. The biomass gas burner with the heat accumulation combustion chamber as claimed in claim 1, wherein the material of the ceramic foam type porous medium (6) is alumina, silicon carbide or zirconia.
CN202020645178.2U 2020-04-24 2020-04-24 Biomass gas burner with heat storage combustion chamber Active CN212057277U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020645178.2U CN212057277U (en) 2020-04-24 2020-04-24 Biomass gas burner with heat storage combustion chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020645178.2U CN212057277U (en) 2020-04-24 2020-04-24 Biomass gas burner with heat storage combustion chamber

Publications (1)

Publication Number Publication Date
CN212057277U true CN212057277U (en) 2020-12-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020645178.2U Active CN212057277U (en) 2020-04-24 2020-04-24 Biomass gas burner with heat storage combustion chamber

Country Status (1)

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CN (1) CN212057277U (en)

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