CN114874813B - Power generation system for decoupling gasification of brown gas catalytic biomass - Google Patents
Power generation system for decoupling gasification of brown gas catalytic biomass Download PDFInfo
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- CN114874813B CN114874813B CN202210539181.XA CN202210539181A CN114874813B CN 114874813 B CN114874813 B CN 114874813B CN 202210539181 A CN202210539181 A CN 202210539181A CN 114874813 B CN114874813 B CN 114874813B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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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
- 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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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The invention relates to the technical field of biomass recycling, in particular to a power generation system for Brown gas catalytic biomass decoupling gasification, wherein the output end of a feeding device is communicated with a Brown gas catalytic biomass decoupling gasification furnace, a Brown gas supply system is connected with the Brown gas catalytic biomass decoupling gasification furnace through a pipeline, a Stirling power generation system is provided with a combustor, the Stirling power generation system is connected with the Brown gas catalytic biomass decoupling gasification furnace through a pipeline, and a tail gas treatment system is connected with the Stirling power generation system through a pipeline. The system can realize biomass decoupling gasification by utilizing the step-by-step catalysis of Brown gas, reduce the reaction condition of a reduction zone, reduce the air equivalence ratio, improve the heat value of fuel gas and reduce CO 2 The content of Brown gas serving as a catalyst is small in mixing proportion, the cost is low, the Brown gas catalyzes biomass decoupling gasification fuel gas to obtain quality improvement, and the reliability of a formed power generation system is improved by matching with a Stirling power generation device.
Description
Technical Field
The invention relates to the technical field of biomass recycling, in particular to a power generation system for catalyzing biomass decoupling gasification by Brown gas.
Background
Biomass energy is the only renewable energy source based on carbon, and is one of the effective ways to replace traditional fossil energy. Biomass energy has the advantages of neutrality, reproducibility, low pollution, wide distribution, large quantity and the like, so that under the policy background of greatly developing clean energy, biomass gasification power generation technology is greatly developed, but the equipment process still has a plurality of problems.
Biomass gasification is utilized by thermochemical conversion of biomassOne of the effective means, however, the gasification combustible gas has low heat value and contains tar, which limits the industrial application of biomass gasification power generation technology. At present, the biomass gasification technology using air as a gasifying agent is widely applied, and has the advantages of low cost, easy acquisition, simple process system and easy operation. However, the introduction of nitrogen in the air and the CO generated by the reaction of the air and the carbon base 2 The heat value of the biomass gasification fuel gas is reduced.
The brown gas is produced by electrolysis of an alkaline aqueous solution as a raw material to produce 2:1 proportion of hydrogen-oxygen mixed combustible gas containing-H, -OH, -O active atomic groups, which promotes macromolecular quick cracking and can reduce coke reaction conditions, reduce air inlet proportion and improve biomass gasification fuel gas CO and H in the biomass gasification process 2 、CH 4 Content of N is reduced 2 And CO 2 The content of the fuel gas is increased, the heat value of the fuel gas is increased, and the tar content is reduced.
The catalyst can improve the calorific value of biomass gasification fuel gas and reduce the tar content. The common catalyst mainly comprises natural ores, alkali metals, nickel-based catalysts, composite catalysts and the like, but the catalyst is easy to accumulate carbon, sinter and even deactivate in the biomass gasification process, so that the application of the catalyst is limited. Therefore, a new biomass gasification technology is needed to solve the problems of low calorific value, high tar content and the like of biomass gasification fuel gas in the existing biomass gasification power generation process.
Disclosure of Invention
In order to solve the problems, the invention provides a power generation system for catalyzing biomass decoupling gasification by using Brown gas, which can realize biomass decoupling gasification by using the step-by-step catalysis of the Brown gas, reduce the reaction conditions of a reduction zone, reduce the air equivalent ratio, improve the heat value of fuel gas and reduce CO 2 The content is as follows.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the power generation system for the Brown gas catalytic biomass decoupling gasification comprises a feeding device, a Brown gas catalytic biomass decoupling gasification furnace, a Brown gas supply system, a Stirling power generation system and a tail gas treatment system, wherein
The output end of the feeding device is communicated with the Brown gas catalytic biomass decoupling gasifier and conveys biomass to the Brown gas catalytic biomass decoupling gasifier;
the brown gas supply system is connected with the brown gas catalytic biomass decoupling gasification furnace through a pipeline and is used for providing brown gas for the brown gas catalytic biomass decoupling gasification furnace and conveying mixed gas of the brown gas and air for the brown gas catalytic biomass decoupling gasification furnace through a gas mixing structure;
the Stirling power generation system is provided with a combustor, is connected with the Brown gas catalytic biomass decoupling gasification furnace through a pipeline, and is used for receiving biomass gasification gas supplied by the Brown gas catalytic biomass decoupling gasification furnace and igniting to generate power;
the tail gas treatment system is connected with the Stirling power generation system through a pipeline and is used for carrying out environment-friendly treatment on tail gas generated by gasifying fuel gas by combusting biomass in the Stirling power generation system.
Preferably, the brown gas catalytic biomass decoupling gasification furnace comprises a furnace body, a brown gas air mixing bellows, gasification medium nozzles, an interlayer sleeve air side connector, an interlayer sleeve brown gas side connector, a gasification medium annular main pipe, a gasification furnace throat, brown gas nozzles and a fuel gas eduction pipe, wherein the gasification furnace throat is arranged in the middle of the furnace body, a furnace cavity at the gasification furnace throat is a fusiform cavity, the gasification medium annular main pipe is arranged outside the furnace body and is close to the top end of the gasification furnace throat, a plurality of gasification medium nozzles are arranged in the furnace body and are close to the top end of the gasification furnace throat, each gasification medium nozzle is communicated with the gasification medium annular main pipe, and the gasification medium annular main pipe is connected with the brown gas air mixing bellows through a pipeline; the Brown gas nozzle is arranged in the furnace body and is positioned in a conical cavity between the throat diameter reducing section of the gasification furnace throat and the lower end of the gasification furnace throat, the Brown gas nozzle is connected with an air side interface of the interlayer sleeve and a Brown gas side interface of the interlayer sleeve through a pipeline and a three-way joint, and the Brown gas supply system supplies gas to the Brown gas catalytic biomass decoupling gasification furnace through the Brown gas side interface of the interlayer sleeve and the Brown gas air mixing bellows;
the gas eduction tube is connected to the gas input end of the furnace body and the burner, and the joint of the gas eduction tube and the furnace body is positioned below the gasification furnace throat.
Preferably, a motor is arranged at the top of the furnace body, the power end of the motor is connected with a stirring distributor, the stirring distributor penetrates through the furnace body and extends into the furnace body, and the motor drives the stirring distributor to rotate so as to prevent biomass bridging in the furnace body.
Preferably, a bucket-shaped fire grate device is arranged at the bottom of the furnace body, and a slag discharging device is arranged at the gathering end of the lower part of the fire grate device.
Preferably, the power generation system for the brown gas catalytic biomass decoupling gasification further comprises a biomass gasification combustion-supporting fan and a biomass gasification combustion-supporting air preheater, wherein the output end of the biomass gasification combustion-supporting fan is connected with the brown gas air mixing bellows through a pipeline, and the biomass gasification combustion-supporting air preheater is used for carrying out heat exchange on air entering the brown gas air mixing bellows and biomass gasification fuel gas discharged from the brown gas catalytic biomass decoupling gasification furnace so as to preheat the air entering the brown gas air mixing bellows.
Preferably, the power generation system for decoupling and gasifying the brown gas catalytic biomass further comprises a fuel preheating device, an exhaust port of the burner is communicated with an air inlet of the fuel preheating device, the exhaust port of the fuel preheating device is connected with the tail gas treatment system through a pipeline, and a feeding path of the feeding device passes through the inside of the fuel preheating device so as to heat and preheat biomass supplied to the brown gas catalytic biomass decoupling and gasifying furnace.
Preferably, the power generation system for decoupling and gasifying the biomass by using the brown gas is characterized by further comprising a burner combustion-supporting fan and a burner combustion-supporting air preheater, wherein the burner combustion-supporting fan is provided with two air output branches, one air output branch is connected with an air interface of the interlayer sleeve through a pipeline, the other air output branch is connected with the burner, and the burner combustion-supporting air preheater is used for exchanging heat between air entering the burner and tail gas discharged by the burner.
Preferably, the tail gas treatment system comprises a bag-type dust remover, a flue gas purification device, a smoke exhaust tube and an induced draft fan, wherein the Stirling power generation system is connected with the smoke exhaust tube through a pipeline, and the bag-type dust remover, the flue gas purification device and the induced draft fan are sequentially arranged on the pipeline between the Stirling power generation system and the smoke exhaust tube.
Preferably, the feeding device comprises a storage bin and a spiral feeding machine, wherein the storage bin is in butt joint with the input end of the spiral feeding machine, and the output end of the spiral feeding machine is in butt joint with the Brown gas catalytic biomass decoupling gasification furnace.
The beneficial effects of using the invention are as follows:
(1) The invention realizes biomass decoupling gasification by utilizing Brown gas step-by-step catalysis, reduces reaction conditions in a reduction zone, reduces air equivalence ratio, improves gas heat value and reduces CO 2 The content is as follows.
(2) According to the invention, the downdraft fixed bed gasifier is utilized, so that tar cracking is promoted under the catalytic action of Brown gas in the tar penetrating process, and the tar content of biomass gasification fuel gas is reduced.
(3) The biomass energy preheating device utilizes the waste heat of gas combustion in the Stirling power generation device to preheat biomass raw materials, and further improves the biomass energy utilization efficiency.
(4) The Brown gas catalytic biomass decoupling gasification technology provided by the invention can be combined with the Stirling power generation device to improve the biomass energy power generation efficiency and reduce the power generation cost, and can be used for building a biomass gasification distributed power generation system.
In the using process and result of the system, the brown gas reaction product is water, and no pollutant is generated in the reaction process. Brown gas is produced along with use, is not stored, improves the reliability, and has no problems of inactivation, sintering and the like. The brown gas is used as a catalyst, the mixing proportion is small, and the cost is low. Brown gas catalyzes biomass decoupling gasification fuel gas to obtain the quality, and the collocation Stirling power generation facility forms the generating system reliability improvement.
Drawings
Fig. 1 is a schematic structural diagram of a power generation system for brown gas catalytic biomass decoupling gasification according to the present invention.
Fig. 2 is a perspective view of a brown gas catalyzed biomass decoupling gasification furnace in a power generation system for brown gas catalyzed biomass decoupling gasification according to the present invention.
Fig. 3 shows whether the power generation system for the brown gas catalytic biomass decoupling gasification has the content of each component of the brown gas catalytic biomass decoupling gasification synthesis gas.
Fig. 4 shows whether the power generation system for the brown gas catalytic biomass decoupling gasification has the brown gas catalytic biomass decoupling gasification synthetic gas heating value.
The reference numerals include:
1. a storage bin; 2. a spiral feeder; 3. brown gas catalyzes the bionass decoupling gasification furnace; 4. a biomass gasification combustion-supporting fan; 5. a biomass gasification combustion-supporting air preheater; 6. a burner; 7. a Stirling power generation system; 8. a fuel preheating device; 9. brown gas generator; 10. a burner combustion fan; 11. a burner combustion-supporting air preheater; 12. a cloth bag type dust collector; 13. a flue gas purifying device; 14. a smoke exhaust tube; 15. an induced draft fan;
3-1, brown gas and air mixing bellows; 3-2, gasifying medium nozzle; 3-3, an air side interface of the interlayer sleeve; 3-4, an interlayer sleeve Brownian gas side interface; 3-5, gasifying medium annular main pipe; 3-6, gasification furnace throat; 3-7, brown gas nozzles; 3-8, a fuel gas eduction tube; 3-9, stirring a distributing device; 3-10, a motor; 3-11, a fire grate device; 3-12, slag discharging device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.
As shown in fig. 1, the power generation system for the brown gas catalytic biomass decoupling gasification comprises a feeding device, a brown gas catalytic biomass decoupling gasification furnace 3, a brown gas supply system, a stirling power generation system 7 and an exhaust gas treatment system, wherein the output end of the feeding device is communicated with the brown gas catalytic biomass decoupling gasification furnace 3 and conveys biomass to the brown gas catalytic biomass decoupling gasification furnace 3; the brown gas supply system is connected with the brown gas catalytic biomass decoupling gasification furnace 3 through a pipeline and is used for providing brown gas for the brown gas catalytic biomass decoupling gasification furnace 3 and conveying mixed gas of the brown gas and air for the brown gas catalytic biomass decoupling gasification furnace 3 through a gas mixing structure; the Stirling power generation system 7 is provided with a combustor 6, the Stirling power generation system 7 is connected with the Brown gas catalytic biomass decoupling gasification furnace 3 through a pipeline, and the Stirling power generation system 7 is used for receiving biomass gasification gas supplied by the Brown gas catalytic biomass decoupling gasification furnace 3 and igniting the biomass gasification gas to generate power; the tail gas treatment system is connected with the Stirling power generation system 7 through a pipeline and is used for carrying out environment-friendly treatment on tail gas generated by burning biomass gasification fuel gas in the Stirling power generation system 7.
As described in connection with fig. 2, the power generation system for the brown gas catalytic biomass decoupling gasification further includes a biomass gasification combustion-supporting fan 4 and a biomass gasification combustion-supporting air preheater 5, wherein the output end of the biomass gasification combustion-supporting fan 4 is connected with the brown gas air mixing bellows 3-1 through a pipeline, and the biomass gasification combustion-supporting air preheater 5 is used for performing heat exchange between air entering the brown gas air mixing bellows 3-1 and biomass gasification fuel gas exiting the brown gas catalytic biomass decoupling gasification furnace 3 so as to preheat air entering the brown gas air mixing bellows 3-1.
The power generation system for the Brown gas catalytic biomass decoupling gasification further comprises a fuel preheating device 8, an exhaust port of the combustor 6 is communicated with an air inlet of the fuel preheating device 8, the exhaust port of the fuel preheating device 8 is connected with the tail gas treatment system through a pipeline, and a feeding path of the feeding device passes through the inside of the fuel preheating device 8 so as to heat and preheat biomass supplied to the Brown gas catalytic biomass decoupling gasification furnace 3.
The power generation system for the Brown gas catalytic biomass decoupling gasification further comprises a burner combustion-supporting fan 10 and a burner combustion-supporting air preheater 11, wherein the burner combustion-supporting fan 10 is provided with two air output branches, one air output branch is connected with the interlayer sleeve air side port 3-3 through a pipeline, the other air output branch is connected with the burner 6, and the burner combustion-supporting air preheater 11 is used for exchanging heat between air entering the burner 6 and tail gas discharged by the burner 6.
The tail gas treatment system comprises a bag-type dust remover 12, a flue gas purifying device 13, a smoke exhaust tube 14 and an induced draft fan 15, wherein the Stirling power generation system 7 is connected with the smoke exhaust tube 14 through a pipeline, and the bag-type dust remover 12, the flue gas purifying device 13 and the induced draft fan 15 are sequentially arranged on the pipeline between the Stirling power generation system 7 and the smoke exhaust tube 14.
The feeding device comprises a storage bin 1 and a spiral feeding machine 2, wherein the storage bin 1 is in butt joint with the input end of the spiral feeding machine 2, and the output end of the spiral feeding machine 2 is in butt joint with a Brown gas catalytic biomass decoupling gasification furnace 3.
Specifically, the storage bin 1 is connected with the spiral feeder 2, the spiral feeder 2 is connected with the Brown gas catalytic biomass decoupling gasifier 3, the slag discharging port of the Brown gas catalytic biomass decoupling gasifier 3 is connected with the spiral slag discharging device 3-12, the gasification gas outlet of the Brown gas catalytic biomass decoupling gasifier 3 is connected with the hot working medium end of the biomass gasification combustion-supporting air preheater 5, the hot working medium outlet of the biomass gasification combustion-supporting air preheater 5 is connected with the combustor 6 of the Stirling power generation system 7, the outlet of the combustor 6 is connected with the inlet of the fuel preheating device 8, the outlet of the fuel preheating device 8 is connected with the inlet of the combustor combustion-supporting air preheater 11, the outlet of the combustor combustion-supporting air preheater 11 is connected with the inlet of the bag-type dust remover 12, the outlet of the bag-type dust remover 12 is connected with the flue gas cleaning device 13, the outlet of the flue gas cleaning device 13 is connected with the inlet of the induced draft fan 15, and the outlet of the induced draft fan 15 is connected with the smoke discharging drum 14.
As shown in FIG. 2, the Brown gas catalytic biomass decoupling gasifier 3 comprises a furnace body, a Brown gas air mixing bellows 3-1, a gasification medium nozzle 3-2, an interlayer sleeve air side connector 3-3, an interlayer sleeve Brown gas side connector 3-4, a gasification medium annular main pipe 3-5, a gasification furnace throat 3-6, a Brown gas nozzle 3-7 and a gas eduction pipe 3-8, wherein a heat insulation material and a refractory layer are attached to the inner wall of the furnace body, the gasification furnace throat 3-6 is arranged in the middle of the furnace body, a cavity in the gasification furnace throat 3-6 is a spindle-shaped cavity, the gasification medium annular main pipe 3-5 is arranged outside the furnace body and near the top end of the gasification furnace throat 3-6, a plurality of gasification medium nozzles 3-2 are arranged near the top end of the gasification furnace throat 3-6 in the furnace body, each gasification medium nozzle 3-2 is communicated with the gasification medium annular main pipe 3-5, and the gasification medium annular main pipe 3-5 is connected with the Brown gas air mixing bellows 3-1 through a pipeline; the Brown gas nozzle 3-7 is arranged in the furnace body and is positioned in a conical cavity between the reducing section of the gasification furnace throat 3-6 and the lower end of the gasification furnace throat 3-6, the Brown gas nozzle 3-7 is connected with the air side interface 3-3 of the interlayer sleeve and the Brown gas side interface 3-4 of the interlayer sleeve through pipelines and three-way connectors, and the Brown gas supply system supplies gas to the Brown gas catalytic biomass decoupling gasification furnace 3 through the Brown gas side interface 3-4 of the interlayer sleeve and the Brown gas air mixing bellows 3-1; the gas eduction tube 3-8 is connected with the gas input ends of the furnace body and the burner 6, and the joint of the gas eduction tube 3-8 and the furnace body is positioned below the gasification furnace throat 3-6.
The top of the furnace body is provided with a motor 3-10, the power end of the motor 3-10 is connected with a stirring distributor 3-9, the stirring distributor 3-9 penetrates through the furnace body to extend into the furnace body, and the motor 3-10 drives the stirring distributor 3-9 to rotate so as to prevent biomass bridging in the furnace body.
The bottom of the furnace body is provided with a bucket-shaped fire grate device 3-11, and the lower gathering end of the fire grate device 3-11 is provided with a slag discharging device 3-12.
The gasification furnace throat 3-6 is of a convergent-divergent shape, the upper part of the gasification furnace throat is provided with a gasification medium nozzle 3-2, the gasification medium is mixed gas of brown gas and air, and the lower part of the gasification furnace throat is provided with a brown gas nozzle 3-7; the stirring distributor 3-9 comprises a material homogenizing plate, a stirrer and a motor 3-10, wherein the material homogenizing plate and the stirrer are coaxially arranged, and the stirrer blade adopts a torsion blade; the Brown gas and air mixing bellows 3-1 premix the Brown gas and the outside of the air furnace, the Brown gas and the air furnace are sent into the Brown gas catalytic biomass decoupling gasification furnace 3 through the gasification medium nozzle 3-2 by the arranged gasification medium annular main pipe 3-5, and the number of the gasification medium nozzles 3-2 is an odd number; the brown gas supply system comprises a brown gas generator 9, an interlayer sleeve and a gasification medium nozzle 3-2. The Brown gas generator 9 is connected with the inner tube of the interlayer sleeve, the protective carrier gas (air) is connected with the outer tube of the interlayer sleeve, the gasification medium nozzle 3-2 mixes the protective carrier gas with the Brown gas, and the protective carrier gas is sprayed into the Brown gas catalytic biomass decoupling gasification furnace 3. The slag discharging device 3-12 at the lower part of the furnace body comprises a spiral slag conveyer and a motor. The biomass gasification gas eduction tubes 3-8 are connected with annular exhaust pipes which are symmetrically arranged below the fire grate.
The outlet of the Brown gas-air mixing bellows 3-1 is connected with a gasification medium annular main pipe 3-5, the annular main pipe is connected with the Brown gas catalytic biomass decoupling gasification furnace 3 through a plurality of gasification medium nozzles 3-2, and the gasification medium nozzles 3-2 are uniformly arranged on the same section of the gasification furnace. The Brown gas generator 9 is connected with the Brown gas side interface 3-4 of the interlayer sleeve, the biomass gasification combustion-supporting air preheater 5 is connected with the air side interface 3-3 of the interlayer sleeve, and air and Brown gas are mixed at the outlet of the interlayer sleeve and are introduced into the gasification furnace through the Brown gas nozzle 3-7. The upper end of the gasification furnace throat 3-6 is connected with a gasification medium nozzle 3-2, and a biomass gasification gas eduction tube 3-8 is communicated with a body of the Brown gas catalytic biomass decoupling gasification furnace 3. The fire grate device 3-11 is connected with a slag discharging device 3-12 arranged at the lower end of the fire grate device. The motor 3-10 can drive the stirring distributor 3-9 to rotate, evenly distribute materials in the rotating process and prevent biomass fuel from bridging.
The use process of the power generation system is as follows, broken corncobs are sent into the Brown gas catalytic biomass decoupling gasification furnace 3 from the storage bin 1 through the spiral feeder 2, and the corncobs promote the thermal cracking and oxidation reaction of the corncobs under the action of the Brown gas and air mixture, so that a large amount of combustible gas and biomass coke are produced. Biomass coke and CO under the catalytic action of Brown gas 2 、H 2 O (g) further undergoes a reduction reaction to produce CO and H 2 The biomass gasification combustible gas is introduced into the combustor 6 of the Stirling power generation system 7 through the eduction tube, so that the heat energy of the biomass gasification combustible gas is converted into electric energy. After the fuel gas is combusted by the burner 6, the generated flue gas is discharged into the atmosphere after passing through the burner combustion-supporting air preheater 11, the bag-type dust remover 12, the flue gas purifying system, the induced draft fan 15 and the smoke exhaust tube 14.
As shown in fig. 3 and 4, the content of combustible component CO in gasification gas generated by the brown gas catalytic biomass decoupling gasification furnace 3 can be increased to 24.37%, and H 2 The content can be increased to 13.48%, and the greenhouse gas CO 2 The content is reduced from 11.53 percent to 6.14 percent, and the heat value of the fuel gas can reach 5060.72KJ/Nm 3 。
The foregoing is merely exemplary of the present invention, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present invention, as long as the variations do not depart from the spirit of the invention.
Claims (7)
1. The utility model provides a power generation system of brown gas catalytic biomass decoupling gasification which characterized in that: comprises a feeding device, a Brown gas catalytic biomass decoupling gasification furnace, a Brown gas supply system, a Stirling power generation system and a tail gas treatment system, wherein
The output end of the feeding device is communicated with the Brown gas catalytic biomass decoupling gasifier and conveys biomass to the Brown gas catalytic biomass decoupling gasifier;
the brown gas supply system is connected with the brown gas catalytic biomass decoupling gasification furnace through a pipeline and is used for providing brown gas for the brown gas catalytic biomass decoupling gasification furnace and conveying mixed gas of the brown gas and air for the brown gas catalytic biomass decoupling gasification furnace through a gas mixing structure;
the Stirling power generation system is provided with a combustor, is connected with the Brown gas catalytic biomass decoupling gasification furnace through a pipeline, and is used for receiving biomass gasification gas supplied by the Brown gas catalytic biomass decoupling gasification furnace and igniting to generate power;
the tail gas treatment system is connected with the Stirling power generation system through a pipeline and is used for carrying out environment-friendly treatment on tail gas generated by gasifying fuel gas by combusting biomass in the Stirling power generation system;
the Brown gas catalytic biomass decoupling gasification furnace comprises a furnace body, a Brown gas air mixing bellows, gasification medium nozzles, an interlayer sleeve air side interface, an interlayer sleeve Brown gas side interface, a gasification medium annular main pipe, a gasification furnace throat, the Brown gas nozzles and a fuel gas eduction pipe, wherein the gasification furnace throat is arranged in the middle of the furnace body, a furnace cavity at the gasification furnace throat is a spindle-shaped cavity, the gasification medium annular main pipe is arranged at the position, outside the furnace body, close to the top end of the gasification furnace throat, a plurality of gasification medium nozzles are arranged in the furnace body, close to the top end of the gasification furnace throat, each gasification medium nozzle is communicated with the gasification medium annular main pipe, and the gasification medium annular main pipe is connected with the Brown gas air mixing bellows through a pipeline; the Brown gas nozzle is arranged in the furnace body and is positioned in a conical cavity between the throat diameter-reducing section of the gasification furnace throat and the lower end of the gasification furnace throat, the Brown gas nozzle is arranged downwards, the Brown gas nozzle is connected with an air side interface of the interlayer sleeve and an Brown gas side interface of the interlayer sleeve through a pipeline and a three-way joint, and the Brown gas supply system supplies gas to the Brown gas catalytic biomass decoupling gasification furnace through the Brown gas side interface of the interlayer sleeve and the Brown gas air mixing bellows;
the gas outlet pipe is connected to the gas input ends of the furnace body and the burner, and the joint of the gas outlet pipe and the furnace body is positioned below the gasification furnace throat;
the top of the furnace body is provided with a motor, the power end of the motor is connected with a stirring distributor, the stirring distributor penetrates through the furnace body and extends into the furnace body, and the motor drives the stirring distributor to rotate so as to prevent biomass bridging in the furnace body.
2. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the bottom of the furnace body is provided with a bucket-shaped fire grate device, and the lower gathering end of the fire grate device is provided with a slag discharging device.
3. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the power generation system for the Brown gas catalytic biomass decoupling gasification further comprises a biomass gasification combustion-supporting fan and a biomass gasification combustion-supporting air preheater, wherein the output end of the biomass gasification combustion-supporting fan is connected with the Brown gas air mixing bellows through a pipeline, and the biomass gasification combustion-supporting air preheater is used for carrying out heat exchange on air entering the Brown gas air mixing bellows and biomass gasification fuel gas discharged from the Brown gas catalytic biomass decoupling gasification furnace so as to preheat the air entering the Brown gas air mixing bellows.
4. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the power generation system for the decoupling gasification of the biomass catalyzed by the brown gas further comprises a fuel preheating device, an exhaust port of the burner is communicated with an air inlet of the fuel preheating device, the exhaust port of the fuel preheating device is connected with the tail gas treatment system through a pipeline, and a feeding path of the feeding device passes through the inside of the fuel preheating device so as to heat and preheat biomass supplied to the biomass decoupling gasification furnace of the biomass catalyzed by the brown gas.
5. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the power generation system for the biomass decoupling gasification by the aid of the Lang gas further comprises a burner combustion-supporting fan and a burner combustion-supporting air preheater, wherein the burner combustion-supporting fan is provided with two air output branches, one air output branch is connected with an air interface of the interlayer sleeve through a pipeline, the other air output branch is connected with the burner, and the burner combustion-supporting air preheater is used for exchanging heat between air entering the burner and tail gas discharged by the burner.
6. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the tail gas treatment system comprises a bag-type dust remover, a flue gas purification device, a smoke exhaust tube and an induced draft fan, wherein the Stirling power generation system is connected with the smoke exhaust tube through a pipeline, and the bag-type dust remover, the flue gas purification device and the induced draft fan are sequentially arranged on the pipeline between the Stirling power generation system and the smoke exhaust tube.
7. The brown gas catalyzed biomass decoupling gasification power generation system of claim 1, wherein: the feeding device comprises a storage bin and a spiral feeding machine, wherein the storage bin is in butt joint with the input end of the spiral feeding machine, and the output end of the spiral feeding machine is in butt joint with the Brown gas catalytic biomass decoupling gasification furnace.
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| DE3636024C2 (en) * | 1986-10-23 | 1991-03-28 | Rheinische Braunkohlenwerke Ag, 5000 Koeln, De | |
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