280 results about "Biomass gasification" patented technology

The invention provides a PLC-based biomass gasification industrial steam full-automatic intelligent control system and method. The system comprises a data acquisition module, a modeling identification module, a multi-objective optimization module, a rolling prediction control module, a coordination execution module, a self-adaptive correction module and an abnormal fault tolerance and safety control module. The system collects operation data of a feeding system, a gasification furnace, a boiler, a steam-water system and an environmental protection system in real time through a PLC platform, a dynamic coupling model of a combustion side, a steam-water side and an environmental protection side is established, and a multi-target constraint optimization model with stable steam pressure, up-to-standard emission and minimum energy consumption as targets is constructed. According to the invention, unattended operation of the biomass gasification industrial steam system is realized, the system has the advantages of high control precision, low energy consumption, stable emission and strong fault-tolerant capability, and the intelligence and safety of the industrial steam system are obviously improved.

The invention discloses a biomass gasification experimental design and performance prediction method based on support vector and transfer learning, which comprises the following steps: establishing an Aspen plus simulation model, adjusting the gasification temperature to air equivalence ratio in the Aspen plus model, and obtaining a biomass gasification simulation data set covering wide boundary operation conditions; taking the simulation data set as a training sample, constructing a simulation agent model, and searching an optimal hyper-parameter; extracting a support vector sample through a support vector regression method, designing experimental working condition points, and collecting experimental data to obtain an experimental data set; taking the experimental data set as a model input sample, and outputting a predicted value by the model; performing linear migration on a model prediction result; and performing secondary correction on the difference between the migrated result and the experimental data to obtain a high-precision calibration model fusing linear migration and residual correction. According to the method, the problems of high acquisition cost of biomass gasification experiment data, limited simulation data precision and the like are effectively solved, a model with better generalization ability and higher interpretability is constructed under limited experiment samples, and accurate prediction of product distribution is realized.

The present invention provides a biomass gasification control system and a biomass gasification control method, and belongs to the field of biosynthesis, the biomass gasification control system comprises: a first-stage fluidized bed pyrolysis reactor for performing a preliminary pyrolysis reaction on a biomass raw material to obtain a pyrolysis reactant; the second-stage fluidized bed gasification reactor is used for carrying out gasification reaction on the pyrolysis reactant by utilizing various gasification agents to obtain target synthesis gas, including H2 and CO; wherein the multiple gasifying agents comprise oxygen, water vapor and carbon dioxide; the sensor monitoring module is used for monitoring real-time state data in the first-stage fluidized bed pyrolysis reactor and the second-stage fluidized bed gasification reactor; the central control module is used for sending out an adjusting instruction according to the real-time state data, and the adjusting instruction is used for adjusting and controlling the flow of the multiple gasifying agents, the rotating speed of the fan and the reaction temperature, so that the molar ratio of H2 to CO in the generated target synthesis gas is within a first threshold value range.

The present application belongs to the technical field of biomass energy power generation, and particularly relates to a decoupling type biomass gasification power generation system and a multi-parameter collaborative control method, which comprises the following steps: 1) biomass raw materials are fed into a vertical multi-stage decoupling gasification furnace for gasification, a gasification agent and water vapor are introduced into the decoupling gasification furnace, the amount of the gasification agent and water vapor introduced is adjusted, and the temperature in the reduction zone is controlled at 700-900 DEG C; 2) the gasification products of the decoupling gasification furnace are cooled by a heat exchanger, then filtered by a filter I for the first time, water is removed by a steam-water condenser separator, pressurized by a Roots blower, filtered by a filter II for the second time, and then fed into an internal combustion engine for power generation; and 3) the gas discharged from the internal combustion engine is pressurized by an exhaust gas turbocharger, then compressed by a compressed air generator, and then fed into the decoupling gasification furnace as a gasification agent. The present application has the advantages that the present application can realize in-situ high-temperature catalytic cracking of tar, efficient utilization of waste heat, and stable operation of the system, thereby improving the power generation efficiency and reducing the equipment cost.

The invention discloses a solar-driven biomass pyrolysis-gasification energy utilization system running day and night. The system comprises a biomass pyrolysis-gasification subsystem and a solar spectral photovoltaic water electrolysis subsystem. According to the system, solar frequency division heat collection, high-temperature synthesis gas sensible heat and ash residue waste heat are absorbed and stored in a gradient mode through molten salt and are used for providing heat needed by biomass pyrolysis reaction; in the daytime, the system provides heat required by high-temperature gasification reaction through solar full-spectrum light condensation, and the heat is provided by combustion of part of pyrolysis products when no light exists at night. According to the system, by integrating various energy utilization technologies such as solar full spectrum and spectral utilization, biomass gasification, photovoltaic power generation and waste heat utilization, coupling utilization of two renewable energy sources of solar energy and biomass energy and gradient utilization of energy are achieved, and the energy utilization efficiency of an energy system and the quality of synthesis gas are effectively improved.

The present application provides a kind of green low-carbon biomass coupling molten salt energy storage system for preparing methanol, belongs to the field of methanol preparation system.The problem of methanol release gas and surplus biomass gas produced in the process of biomass gasification for preparing methanol needs to be treated is solved.New energy electricity is partly used for electrolysis of water, and partly as abandoned electricity into molten salt electric heater.Hydrogen produced by electrolysis of water enters catalytic synthesis tower, and oxygen is used for biomass gasification.Carbon monoxide, hydrogen and carbon dioxide produced enter catalytic synthesis tower, and methanol is synthesized in catalytic synthesis tower.Biomass, surplus biomass gas and formaldehyde release gas enter high-temperature high-pressure biomass fluidized bed boiler, and then superheated steam produced by high-temperature high-pressure biomass fluidized bed is used as a catalytic temperature heat source for producing methanol, and the remaining steam enters a power generation system for power generation to ensure stable power supply of the entire system.The high-temperature high-pressure steam produced for power generation can improve the unit efficiency.

The invention belongs to the technical field of biomass energy, and discloses an energy system based on biomass gasification, which is characterized in that biomass is converted into high-temperature synthesis gas flow by a gasification furnace, the high-temperature synthesis gas flow enters a carbon dioxide supercritical device to heat carbon dioxide fluid into supercritical fluid so as to drive power generation, and medium-high-temperature synthesis gas flow is formed; the medium-high-temperature synthesis gas flow enters the organic Rankine cycle device to heat and evaporate the organic fluid into high-enthalpy fluid to drive power generation and form medium-low-temperature synthesis gas flow, and the medium-low-temperature synthesis gas flow enters the seawater desalination device to evaporate and separate seawater into fresh water and saline water and form low-temperature synthesis gas flow; the methanol synthesis device captures hydrogen and carbon dioxide in the low-temperature synthesis gas flow and synthesizes methanol; electric energy and fresh water are obtained through stepped utilization of heat energy of synthesis gas flow, the energy utilization rate is greatly improved, hydrogen energy is obtained by capturing hydrogen in the synthesis gas flow, and carbon dioxide in the synthesis gas flow is further captured to synthesize methanol with the hydrogen.

The invention relates to the technical field of biomass treatment, in particular to a biomass gasification system and a biomass gasification method. The biomass gasification system comprises a gasification furnace which is provided with a furnace body, a biomass inlet communicated with the furnace body, a gasification agent inlet and a crude synthesis gas outlet; an inlet of the waste heat boiler is communicated with the crude synthesis gas outlet, and an outlet of the waste heat boiler is connected with a negative pressure device; an inlet of the dust remover is communicated with the negative pressure device, and an outlet of the dust remover is connected with a cooling device. The biomass and the gasifying agent are gasified and reacted in the gasifier to generate crude synthesis gas, the crude synthesis gas is discharged after being dedusted by the deduster and cooled by the cooling device in sequence under the negative pressure environment provided by the negative pressure device, and due to the arrangement of the negative pressure device, the atmospheric pressure in the system is always lower than the atmospheric pressure outside the system; therefore, the synthesis gas generated in the system cannot be leaked, but is discharged from a unified outlet after being treated, so that the normal operation of equipment is ensured, and the potential safety hazard is reduced.

The invention belongs to the technical field of biomass gasification, and particularly relates to a preparation method of high-calorific-value biomass gas. The preparation method comprises the following steps: (1) performing pyrolysis reaction on a modified biomass raw material in a pyrolysis reactor to obtain pyrolysis gas and solid biochar; (2) enabling the pyrolysis gas and water vapor to flow into a fixed bed reactor filled with a catalyst layer in parallel from bottom to top, carrying out methanation reaction to obtain product gas, enabling the product gas to flow out from the top of the fixed bed reactor, dividing the product gas into three streams, namely product gas A, product gas B and product gas C, cooling the product gas A to 40-50 DEG C, returning the product gas A to the fixed bed reactor, and enabling the product gas B to flow into the fixed bed reactor; the product gas B directly returns to the fixed bed reactor, and the reaction gas C is cooled and then is collected as biomass fuel gas. According to the preparation method, the content of methane in the fuel gas and the calorific value of the fuel gas can be remarkably increased.

The present application provides a kind of biomass gasification coupling SOEC co-electrolysis system and process of green fuel, the present application is coupled with biomass gasification and solid oxide electrolytic cell (SOEC) co-electrolysis synthesis gas path, with forestry waste biomass as raw material, adopt oxygen-carrying-CO2 adsorption functional material, construct gasification-adsorption integrated and SOEC co-electrolysis deep coupling system;System includes gasification unit, first heat exchange unit, gas purification unit, regeneration oxidation unit, SOEC electrolysis unit and fuel synthesis unit;With wind power, photovoltaic and other green electricity as SOEC electrolysis unit driving energy, integration biomass directional conversion, CO2 in situ capture-function material regeneration cycle, SOEC high temperature co-electrolysis is integrated, rely on heat cascade utilization, achieve system material closed loop reuse;By adjusting the amount of water vapor in the system, obtain specific hydrogen carbon ratio synthesis gas, so as to realize the production of green fuel, whole process saves traditional water gas shift process, improve system energy efficiency, avoid carbon loss, reduce high temperature energy consumption.

The utility model discloses a system for preparing renewable natural gas by utilizing biomass, which comprises a biomass degradation system, a biomass combustion system, a biomass gasification system and a wind and light energy storage electrolysis system, the biomass degradation system comprises an anaerobic fermentation device, a purification device and a biogas storage tank I which are communicated in sequence, the biomass combustion system comprises a biomass boiler, a carbon dioxide trapping device, a methanation device I and a synthetic natural gas storage tank which are sequentially communicated, and the biomass gasification system comprises a gasification furnace, a methanation device II and a biogas storage tank II which are sequentially communicated. The wind and light energy storage electrolysis system comprises a wind power and photovoltaic power generation system and an electrolytic cell which are sequentially communicated. The biomass recycling system has the advantages that recycling treatment of different types of biomass is realized, and meanwhile, efficient development and utilization of biomass energy are also realized.

The invention relates to the technical field of energy scheduling, in particular to a scheduling method and system for an off-grid wind-solar hydrogen production and biomass gasification methanol production system, and the method comprises the steps: obtaining system prediction data; judging whether an extreme weather event occurs or not based on the environment temperature predicted value; dynamically calculating the thermal power for maintaining the lowest safe activity of the synthetic tower catalyst; taking the maximum methanol output value as a scheduling target, constructing a target function, and generating an optimal scheduling plan of a specific period in the future; executing the optimal scheduling plan; according to the method, a prediction-based dynamic guaranteed threshold model is introduced; according to the method, the future environment temperature is analyzed in real time, a catalyst activity attenuation kinetic model is combined, and the thermal power required for maintaining the lowest safe activity of the synthetic tower catalyst is dynamically calculated; according to the method, the energy scheduling decision is improved from passive response to active defense, absolute safety of chemical production core equipment under extreme conditions is ensured, and huge loss caused by non-planned shutdown is effectively avoided.

The invention provides a traditional Chinese medicine residue resource utilization process which comprises the following steps: collecting traditional Chinese medicine residues, classifying and storing the traditional Chinese medicine residues, chopping and drying the traditional Chinese medicine residues, and evaporating water to complete pretreatment of the traditional Chinese medicine residues; the pretreated traditional Chinese medicine residues are subjected to biomass gasification treatment in a biomass gasification treatment mode; combustible gas generated in the biomass treatment process is completely combusted by a gas generator to generate heat and electric energy; the residues obtained after biomass gasification treatment are subjected to carbonization treatment, and the residues achieve the effect of biomass carbon. The traditional Chinese medicine residues are subjected to chopping and drying pretreatment and then subjected to biomass treatment, so that combustible mixed gas containing hydrogen, carbon monoxide, methane and the like is generated from the traditional Chinese medicine residues, the gas can form new energy to serve as boiler production power, zero emission of production waste is achieved, pollution to the environment is reduced, the residues are subjected to carbonization treatment, and the production cost is reduced. And the residue reaches the effect of biomass carbon, so that resource recycling is realized, and the method is economical and practical.

The invention discloses a carbon emission reduction accounting method for a biomass gasification carbon sequestration poly-generation system. The carbon emission reduction of the system is finally calculated by sequentially calculating the power generation reference line carbon emission reduction, the heat reference line carbon emission reduction, the activated carbon product reference line carbon emission reduction, the carbon-based fertilizer product reference line carbon emission reduction, the emission amount which is not generated due to products in the system operation process and the external energy emission amount. Complex parameters are avoided, data certainty is high, collecting and measuring are easy and convenient, meanwhile, the unified accounting standard and method system are adopted, the carbon emission reduction amount can be accurately calculated according to regional characteristics, the calculation result certainty and accuracy are high, and the good practical value is achieved. Technical support is provided for carbon accounting and carbon emission reduction evaluation of a biomass gasification carbon sequestration co-production electric heating carbon fertilizer system, and the application prospect is wide.

The utility model provides a device for co-producing synthesis gas through biomass fermentation. The device comprises a biomass enzymolysis tank and a solid-liquid separation device which are connected, a solid phase outlet of the solid-liquid separation device is connected with the raw material pretreatment device; a liquid phase outlet of the solid-liquid separation device is connected with the co-production fermentation device; an outlet of the raw material pretreatment device is connected with the co-production gasification device; the co-production gasification device is used for entrained-flow bed reaction, washing and cooling; the co-production fermentation device comprises a fermentation tank and a rectification device; according to the device disclosed by the utility model, a liquid-phase product of biomass enzymolysis is used for fermentation, and a solid-phase residue is used for biomass gasification and co-production of synthesis gas after being subjected to related pretreatment, so that the tedious operation of drying, briquetting or granulating, carbonizing and grinding the traditional biomass raw material is omitted, the gasification process cost is reduced, and the production efficiency is improved. The resource utilization of the enzymolysis residues is realized.

The invention relates to the technical field of biomass energy conversion, in particular to a method and system for preparing sustainable aviation kerosene through methanol based on biomass gasification. The method sequentially comprises the steps of biomass gasification, purification and proportion adjustment, methanol synthesis, methanol-to-olefin conversion, oligomerization reaction and hydrofining. The selectivity of a target component is effectively improved by regulating and controlling the H2 / CO molar ratio to 2.0-2.2 and realizing multi-section conversion and heat energy gradient recovery under middle and high pressure. The condensation point of the finished product can reach-48 DEG C, the aromatic hydrocarbon mass fraction is as low as 0.22%, and the aviation fuel standard requirements are met. The method has the advantages of being high in carbon utilization rate, excellent in product quality, low in energy consumption, suitable for large-scale operation and the like, and is suitable for green manufacturing of sustainable aviation fuel.

The invention discloses a gasification furnace for biomass gasification processing, and relates to the technical field of biomass hydrogen production equipment.The gasification furnace comprises a working barrel, a pyrolysis barrel is arranged below the working barrel, a discharging barrel is arranged in the working barrel, and a driving mechanism for discharging is arranged in the working barrel; a material distributing mechanism used for distributing materials is arranged below the driving mechanism, through rotation of a scraping rod and a kneading roller, leaves can be kneaded and mixed at the same time, after the leaves are fully mixed with straw in a clustered state, the leaves are distributed through a material distributing plate and a material guiding plate and then evenly fall into a pyrolysis cylinder, and the pyrolysis efficiency is improved. The situation that the leaves are located on the upper layer in the pyrolysis cylinder and the straw is located on the middle lower layer is avoided, the situation that the leaves are fully pyrolyzed, and heat cannot be effectively transferred downwards can be effectively avoided, and the pyrolysis and gasification effect on the leaves and the straw can be effectively improved.

The invention discloses a system and a method for preparing green natural gas by coupling renewable resources with green hydrogen, and particularly relates to the field of preparation of green natural gas. Comprising a wind-light-green electricity supply and green hydrogen preparation module, a biomass gasification synthesis gas preparation module, a synthesis gas desulfurization purification module, a green hydrogen supplement and hydrogen-carbon ratio adjustment module and a high-temperature methanation synthesis green natural gas module. The wind, light and green power supply and green hydrogen preparation module is used for producing green hydrogen through wind, light and green power supply; the biomass gasification synthesis gas preparation module is used for treating agriculture and forestry waste biomass in a liquid deslagging fixed bed gasification mode to obtain synthesis gas; the synthesis gas desulfurization and purification module is used for performing desulfurization and purification on the synthesis gas. Full-chain zero-carbon circulation of green electricity-green hydrogen-green natural gas is achieved, the dual-carbon target requirement is met, the device investment and operation cost are reduced, and the resource utilization rate is remarkably increased.

The application discloses a cold-heat-electricity-alcohol poly-generation system integrating solar biomass gasification and CO2 capture and resource utilization, which comprises a solar biomass gasification unit, a CO preferential oxidation and purification unit, a CO2 hydrogenation methanol synthesis unit, a fuel cell power generation unit and a waste heat utilization unit; a synthesis gas outlet of the solar biomass gasification unit is connected with an inlet of the CO preferential oxidation and purification unit; a hydrogen-rich gas outlet of the CO preferential oxidation and purification unit is connected with an anode inlet of the fuel cell power generation unit; a CO2 enrichment flow outlet of the CO preferential oxidation and purification unit is connected with a CO2 inlet of the CO2 hydrogenation methanol synthesis unit; and a heat output interface of the fuel cell power generation unit is connected with a heat source inlet of the waste heat utilization unit. The application can realize the collaborative consumption of solar energy and biomass energy, the resource utilization of CO2 capture and the energy cascade recovery, and can simultaneously produce electric energy, cold energy, heat energy and methanol products, and has high comprehensive efficiency and low carbon emission.

The utility model relates to the technical field of biomass gasification furnace, concretely is denitration catalyst modularization drawer type quick -mounting structure, including reaction bin, the front of reaction bin is equipped with a plurality of drawer grooves, the inside of reaction bin is provided with a plurality of reaction cavities, and the drawer groove is located in the reaction cavity, the top of drawer groove is provided with the opening, and the reaction cavity sprays ammonia gas through ammonia gas spraying pipeline, and a row of reaction cavities are connected in series through the connecting channel. In the denitration catalyst modularization drawer type quick -mounting structure, adopt drawer type structure design, and the catalyst module can be directly pulled through the handle, and quick locking and unlocking are realized in combination with magnetic attraction piece, and it is not necessary to need complex tool and large -area to dismantle reactor, and the maintenance time and manpower cost are significantly shortened. For example, the catalyst replacement needs several hours and many people cooperation in the comparative file, and a single person can complete the replacement of single module in a few minutes.

According to the method for preparing the green fuel with the biomass as the raw material and the green fuel preparation system, biomass utilization, hydrogen production through water electrolysis and methanol synthesis are coupled, the overall material and energy utilization efficiency can be improved, and the emission of carbon dioxide is reduced. The method comprises the following steps: (1) feeding biomass into a biomass gasification unit for gasification reaction to obtain crude synthesis gas; (2) feeding the crude synthesis gas into a gas purification unit for treatment; (3) feeding the purified synthesis gas into a decarburization unit for treatment to obtain carbon dioxide and decarburized synthesis gas; feeding carbon dioxide and hydrogen into a methanol synthesis unit to react to generate methanol; (4) mixing the decarbonized synthesis gas with hydrogen to adjust the hydrogen-carbon ratio of the synthesis gas, and feeding the adjusted synthesis gas into a Fischer-Tropsch synthesis unit to obtain a Fischer-Tropsch synthesis product; and (5) feeding hydrocarbons with more than C5 into a cracking isomerization unit to be in contact with hydrogen for hydro-conversion, and fractionating to obtain a gasoline component and an aviation kerosene component.

The present application belongs to the technical field of biomass conversion and synthetic fuel, and relates to a method and system for preparing aviation kerosene by coupling green hydrogen and biomass gasification. The method comprises: preparing green hydrogen by electrolyzing water, and byproduct oxygen is used for biomass oxygen-enriched gasification; biomass is gasified in a fluidized bed at an oxygen partial pressure of 0.5-1 MPa and a temperature of 800-1000 DEG C to prepare syngas; the syngas is mixed with electrolytic hydrogen after pressure swing adsorption, methanol solution contact, low-temperature filtration and pressure reduction purification; the volume fraction of the feed hydrogen is stabilized at 70%-80% through online analysis and closed-loop control; crude oil is synthesized in a Fischer-Tropsch system taking methanol as a medium and carrier and oxalic acid as an adjusting agent; aviation kerosene fraction is obtained through rectification, and the heavy component is subjected to hydrocracking / isomerization by using a Pt-based catalyst. The present application effectively improves the stability of the feed hydrogen partial pressure and the product yield, and ensures the consistent quality of the aviation kerosene.

This invention discloses a method for preparing a biomass gasification adsorption-enhanced reforming hydrogen production catalyst, belonging to the fields of catalyst preparation and biomass thermal conversion technology. The catalyst of this invention uses CeO2 as a high-content support and Ni and Fe as active components. The method employs a co-impregnation method to simultaneously load a nickel active phase precursor and an iron co-catalytic precursor onto the support surface; after drying, the precursor powder is placed under an inert atmosphere and processed according to the following relationship... T ×0.01+ t By calcining at a temperature T of 10°C with a time t in a complementary correlation, a composite catalytic system with strong interactions is constructed. This invention also provides the application of the above catalyst in combination with a calcium-based adsorbent in biomass adsorption-enhanced reforming for hydrogen production. This invention enhances the catalyst's resistance to carbon deposition by regulating the bimetallic electronic structure and the oxygen storage and release capacity of the support. Simultaneously, by combining a segmented temperature control process, it achieves kinetic synergy between in-situ CO2 capture and catalytic reforming, significantly increasing the green hydrogen content in the syngas.

The invention provides a biomass gasification reaction device, and belongs to the field of biosynthesis, the biomass gasification reaction device comprises: a pyrolysis reactor for performing a pyrolysis reaction on a biomass raw material to obtain a pyrolysis reactant, the pyrolysis reactant comprising bio-oil and initial synthesis gas; the gasification reactor is used for carrying out gasification reaction on the pyrolysis reactant by utilizing various gasification agents to obtain target synthesis gas, and the target synthesis gas comprises H2 and CO; wherein the gasification reactor comprises a multi-stage gasification agent nozzle module; the multi-stage gasification nozzle module comprises a plurality of gasification agent nozzles and a plurality of gasification nozzles, wherein each gasification agent nozzle is used for injecting a gasification agent into the gasification reactor; the plurality of gasifying agent nozzles are axially arranged along the central axis direction of the gasification reactor; and moreover, the gasifying agent nozzles for injecting the same type of gasifying agent are positioned at the same height of the gasification reactor.

The invention relates to the technical field of battery negative electrode material processing, in particular to a biomass gasification system and method for battery negative electrode material coating granulation heating, and the biomass gasification system comprises a biomass gasification subsystem, a petroleum coke coating granulation heating subsystem, a waste gas combustion treatment subsystem and a waste heat utilization subsystem, the biomass gasification subsystem comprises a biomass raw material drying device, a biomass feeding system, a biomass gasification furnace, a biomass gas purification device, a water-cooling charcoal discharging device and a fuel gas booster fan which are connected in sequence. According to the biomass gasification system and method for coating, granulating and heating the battery negative electrode material, the heating cost can be saved by 20% or above, meanwhile, the quality of petroleum coke products is not affected, petroleum coke waste gas is recycled, the dust conveying capacity is improved, the problem of ash and tar deposition caused by too low waste gas flow speed is solved, and the energy consumption is reduced. And a nitrogen constant pressure system is upgraded and reformed, so that the risk of burning explosion of waste gas can be further reduced.

The present application belongs to the technical field of biomass gasification, and particularly relates to a preparation method of high-calorific-value biomass gas. The preparation method comprises: (1) pyrolysis of modified biomass raw materials in a pyrolysis reactor to obtain pyrolysis gas and solid biochar; (2) co-currently passing the pyrolysis gas and water vapor into a fixed bed reactor filled with a catalyst layer from bottom to top to perform a methanation reaction to obtain product gas, the product gas flowing out from the top of the fixed bed reactor, the product gas being divided into three streams, denoted as product gas A, product gas B and product gas C, the product gas A being cooled to 40-50 DEG C and then returned to the fixed bed reactor, the product gas B being directly returned to the fixed bed reactor, and the reaction gas C being cooled and then collected as biomass gas. The preparation method can significantly increase the content of methane in the gas and the calorific value of the gas.

The application relates to a biomass gasification device and relates to the technical field of biomass gasification, which comprises a gasification hearth, a fluidized bed is arranged in the gasification hearth, a bubbling bed is arranged in the gasification hearth, a biomass gasification area is arranged between the bubbling bed and the fluidized bed, and the biomass gasification area is used for making biomass stack combustion; the bubbling bed is located at the upper end of the biomass gasification area, a feeding device is arranged on the gasification hearth, an air inlet pipe is arranged on the gasification hearth, the air inlet pipe is used for blowing air into the fluidized bed, the air inlet pipe is used for making fuel in the biomass gasification area tumble, the air inlet pipe is used for blowing the fuel which is not fully combusted on the fluidized bed to the bubbling bed, a cyclone separator is arranged on the upper portion of the gasification hearth, the cyclone separator outputs relatively clean combustible gas after carrying out gas-solid separation on dust-containing combustible gas, the cyclone separator is used for inputting the fuel which is not fully combusted into the bubbling bed, and an ignition device is arranged on the bubbling bed and the fluidized bed. The application has the effect of fully gasifying biomass fuel.

The application relates to the technical field of biomass gasification furnaces, and discloses a distributing device of a gasification furnace, which is mainly composed of a gasification furnace body, a working box body, a feeding cylinder, a feeding auger, a distributing auger, an extension cavity and an extension plate. The lower side of the gasification furnace body is provided with the working box body, the inner cavity of the gasification furnace body is communicated with the inner cavity of the working box body, the left side of the gasification furnace body is provided with the feeding cylinder, the feeding cylinder is provided with the feeding auger, the inner cavity of the gasification furnace body is provided with the distributing auger, the inside of the working box body is provided with the extension cavity, and the extension plate is sealingly and movably arranged in the inner cavity of the extension cavity. The distributing auger and the extension plate are arranged, so that the distributing auger contacts the biomass entering the middle position of the gasification furnace body during operation, and then drives the biomass to move to the two sides of the extension plate. Through the above action, the subsequent biomass is more evenly dropped onto the reciprocating grate, so that the probability that the gas production efficiency is affected is reduced.

The invention discloses a multifunctional biomass gasification furnace, and relates to the technical field of gasification furnaces, the multifunctional biomass gasification furnace comprises a connecting bottom plate, the top of the connecting bottom plate close to the edge of one side is provided with a combustion assembly used for gasifying various biomasses; two cleaning assemblies used for removing tar generated by biomass combustion are arranged at the position, close to the center, of the top of the connecting bottom plate. According to the multifunctional biomass gasification furnace, when the multifunctional biomass gasification furnace is used for combusting biomass fuel to generate combustible gas, quantitative limestone and biomass fuel are conveyed into the combustion chamber, the combustible gas is generated through combustion and conveyed into the cleaning chamber, tar in coal gas makes contact with the surface of a retention plate, and the tar in the coal gas makes contact with the surface of the retention plate; and tar particles are attached to the surface of the tar particles, so that the tar in the coal gas is purified, and the problem that in the prior art, the tar in most gasification furnaces is difficult to effectively remove and is easily attached to a gas conveying pipeline to damage the stable operation of the gasification furnaces is solved.

The invention relates to the biomass gasification equipment for households that applies biomass gasification technology and burns the generated biomass gas to generate heat for cooking and / or to produce biochar. The equipment according to the invention is a type of continuous volumetric biomass gasification equipment, operating in batches. This equipment is in the form of a vertical cylinder, including a fuel chamber, inside this chamber includes a primary air distribution unit located at its bottom to distribute the primary air, the secondary air box is located inside the space between the two shells of the equipment. In another option, there is also a gasification chamber inside the fuel compartment of the gasification equipment.