94 results about "Fluidized bed gasifier" patented technology

The invention discloses a preparation method and application of a wind cap of a circulating fluidized bed gasifier, the wind cap is arranged at the bottom of a gasifier body, the wind cap mainly comprises a wind cap gas inlet, a wind cap gas outlet and a wind cap gas flow channel, and the wind cap gas flow channel is composed of a Tesla valve fluid channel. The air cap is prepared from modified fly ash through a combined method of freezing ball-milling nano modification, 3D printing coupling microwave-assisted sintering and salt bath chromizing strengthening. According to the method, a large amount of solid waste of fly ash can be consumed to realize carbon emission reduction, the efficiency of the circulating fluidized bed can be improved through structural optimization, meanwhile, the preparation cost of the hood can be reduced, and the method has relatively high application and popularization values.

The invention provides a biomass gasification system and a fluidized bed gasification process, the system comprises a fluidized bed gasification furnace, a cyclone separator and a material returning leg, the fluidized bed gasification furnace is provided with a gasification cavity and a gas chamber, and a fluidized bed formed by bed materials is arranged in the gasification cavity. Bed materials are added into the gasification furnace in a spiral feeding and pneumatic conveying combined mode, a fluidized bed is established, biomass particles are added after temperature rise, the pressure in the gasification furnace is kept to be certain, and an auxiliary gasification agent enables the biomass particles to be in a fluidized state. According to the invention, the melting characteristic of biomass ash can be effectively improved, the problem of easy slag bonding during biomass gasification is solved, the gasification temperature is effectively increased, and the methane content in the synthesis gas is reduced. The bed material can catalytically crack tar generated in the biomass gasification process, the quality of synthesis gas is optimized, the synthesis gas is prevented from being bonded and attached to the metal wall of a downstream device, the yield of the synthesis gas and the stability of the device are improved, and the heat exchange efficiency of a downstream waste heat recovery unit is enhanced.

The invention discloses a coal and biomass material co-gasification device, and relates to the technical field of fuel gasification devices, the coal and biomass material co-gasification device comprises a fixed bed gasification furnace and a fluidized bed gasification furnace, the bottom of the fixed bed gasification furnace is in through connection with the top of the fluidized bed gasification furnace; a vibrating feeder, a vibrating sorting machine, a funnel, a material crusher, a stirrer and a preheater which are used for raw material treatment are arranged at the upper end of the fixed bed gasification furnace, the interior of the fluidized bed gasification furnace is divided into a circulating fluidized bed gasification part and a fixed bed gasification part, and the circulating fluidized bed gasification part is located at the top of the fluidized bed gasification furnace; the fluidized bed gasification furnace has the advantages of high efficiency, low pollution, stable operation and stable raw material supply, and solves the problems of screen mesh blockage, material adhesion and low carbon conversion rate when the traditional fixed bed and fluidized bed gasification furnace are used for treating coal and biomass mixed raw materials.

The utility model relates to a biomass gasification system which comprises a pressurized feeding unit, a fluidized bed gasification unit, a deslagging unit, an entrained-flow bed high-temperature cracking unit, a synthesis gas washing unit, a slag water unit and a gasifying agent conveying unit, the fluidized bed gasification unit comprises a fluidized bed gasification furnace and a high-temperature cyclone separator; the fluidized bed gasification furnace is connected with the pressurized feeding unit, the gasifying agent conveying unit, the high-temperature cyclone separator and the deslagging unit; the entrained-flow bed high-temperature cracking unit comprises an entrained-flow bed high-temperature cracking furnace, and the entrained-flow bed high-temperature cracking furnace is connected with a high-temperature cyclone separator, a gasifying agent conveying unit, a synthesis gas washing unit and a slag water unit. Compared with the prior art, the fluidized bed entrained-flow bed has the advantages of a fluidized bed and an entrained-flow bed, and has the characteristics of wide raw material applicability, high effective gas content, no tar, low energy consumption and the like.

The invention discloses a process method and device for co-production of carbon through positive pressure biomass gasification. The process method comprises the following steps: transporting the biomass fuel to a stokehole stock bin; biomass fuel is fed into the fluidized bed gasification furnace through the stokehole positive pressure feeding system, and bed materials are supplemented to the fluidized bed gasification furnace at any time through the bed material supply system according to needs; biomass fuel is gasified under the action of a centrifugal fan at the bottom of the fluidized bed gasification furnace, the supply quantity of fluidizing air and an air gasifying agent is adjusted through a variable-frequency centrifugal fan, the temperature of the fluidized bed gasification furnace is adjusted, and therefore the proportion of generated gasified fuel gas to biomass charcoal is adjusted; blocky biomass charcoal falls into the bottom end of the fluidized bed gasification furnace and is collected and utilized; and the ash-shaped biomass charcoal sinks through a cyclone separator at the upper end of the fluidized bed gasification furnace and enters an ash discharging system to be collected and utilized. The device is operated under positive pressure, and better adapts to the change of downstream fuel gas and biomass charcoal requirements and the change of upstream biomass fuel.

The invention relates to a device for preparing high-calorific-value low-carbon fuel from biomass, and belongs to the technical field of chemical equipment. The device comprises a stock bin, a fluidized bed pyrolyzing furnace, an overflow channel, a fluidized bed gasification furnace and a cyclone separator which are sequentially connected, the cyclone separator is communicated with the fluidized bed pyrolyzing furnace, and the fluidized bed gasification furnace is connected with a microwave generator; the bottom of the fluidized bed pyrolyzing furnace is communicated with an oxygen-poor gas input pipeline, and the bottom of the fluidized bed gasifying furnace is communicated with an oxidizing gas input channel. The biomass gasification reaction is divided into a pyrolysis process and a gasification process by the double fluidized beds, the two processes are decoupled, and a plurality of functional groups related to hydrogen production are generated by low-temperature pyrolysis in the fluidized bed pyrolyzing furnace, so that the yield of hydrogen is increased; microwave heating is introduced into the fluidized bed gasification furnace, so that the gasification furnace can reach the required temperature more quickly, meanwhile, pyrolysis products are converted through microwave targeting energy, generation of tar and methane is remarkably reduced, and generation of hydrogen production reaction is facilitated, so that high-calorific-value low-carbon fuel is generated.

The invention discloses a system and a method for producing synthesis gas by coupling biomass double-fluidized-bed chemical looping gasification and oxygen-enriched combustion, and belongs to the technical field of energy, environmental protection and chemical engineering. The system comprises a stock bin, a feeder, a fluidized bed gasifier, a return feeder, a fluidized bed oxygen-enriched combustion furnace, a cyclone separator, a heat exchanger and a purifier. Biomass and an oxygen carrier are subjected to a chemical chain gasification reaction in the fluidized bed gasification furnace to generate high-quality synthesis gas, residual carbon and the oxygen carrier after the reaction enter the fluidized bed oxygen-enriched combustion furnace to be subjected to an oxygen-enriched combustion reaction to generate high-concentration carbon dioxide, and the oxygen carrier returns to the fluidized bed gasification furnace after being regenerated. By coupling the double-fluidized-bed chemical-looping gasification and oxygen-enriched combustion technologies, the problems of low carbon conversion rate and the like of the existing biomass chemical-looping gasification are solved, the co-production of high-quality synthesis gas and high-concentration carbon dioxide is realized, the flexibility of a process organization for producing green liquid fuel by taking biomass as a raw material is improved, and the production cost is reduced. The requirements on follow-up synthesis process parameters are reduced, and the material and energy utilization efficiency of the whole system is effectively improved.

The utility model discloses a biomass fluidized bed gasification furnace heat supply coupling internal combustion engine power generation system. A biomass gasification furnace utilizes biomass raw materials to produce combustible gas; the internal combustion generator set generates power by taking combustible gas as a gas source, the working time of the internal combustion generator set is concentrated on the peak-flat section of the power grid electricity price, and the electric energy generated by the internal combustion generator set is supplied to the power grid; the biomass gas steam boiler receives combustible gas and burns the combustible gas to generate heat, steam heat energy generated by the biomass gas steam boiler is supplied to the user side, and the working time period of the biomass gas steam boiler is concentrated in the valley period of the power grid electricity price. Both the biomass gas steam boiler and the internal combustion generator set receive combustible gas produced by the biomass gasification furnace through gas pipelines, and the gas pipelines are provided with electric control valves for controlling the gas supply states of the internal combustion generator set and the biomass gas steam boiler. The comprehensive energy consumption cost can be reduced, the energy utilization efficiency is improved, and meanwhile, remarkable environmental benefits are achieved.

The present invention relates to the technical field of biomass power generation, and specifically discloses a high-efficiency and high-adaptability dual-fluidized-bed gasification and baking device, which includes a base. Above the base, there are a fluidized-bed baking furnace and a fluidized-bed gasification furnace. The fluidized-bed baking furnace is on the left side of the fluidized-bed gasification furnace. A cyclone dust collector is fixedly installed at the outlet of the fluidized-bed gasification furnace. A processing component is arranged on the right side of the cyclone dust collector. The processing component includes a bottom pipe arranged on the right side of the cyclone dust collector. A processing pipe is fixedly inserted at the top of the bottom pipe. A top pipe is fixedly inserted at the top of the processing pipe. A gas discharge pipe is fixedly inserted at the middle position of the top of the top pipe. Through the cooperation of the above structures, the biomass gas introduced into the processing pipe can be cooled, so as to produce liquid tar impurities, and the sawdust in the processing frame is used to adsorb the tar impurities, so as to treat the tar impurities in the biomass gas and ensure that the amount of impurities contained in the produced biomass gas is less.

The invention belongs to the technical field of gasification, and particularly relates to a biomass fluidized bed gasification coupling reforming synthesis gas preparation device and method.The biomass fluidized bed gasification coupling reforming synthesis gas preparation device comprises a fluidized bed gasification furnace, and a gas outlet in the upper end of the fluidized bed gasification furnace is connected with a gas inlet of a high-temperature reforming reactor through a pipeline; a gas outlet of the high-temperature reforming reactor is connected with a gas inlet of the waste heat boiler through a pipeline, a gas outlet of the waste heat boiler is connected with a gas inlet in the lower portion of the filter through a pipeline, and a gas outlet in the upper end of the filter is connected with a gas inlet in the lower portion of the deoxidized water preheater through a pipeline. According to the present invention, with the method for producing the synthesis gas by coupling the fluidized bed gasification furnace with the reforming reactor, the overall cold coal gas efficiency and the carbon conversion rate of the gasification system are improved, the tar and the methane in the synthesis gas are substantially reduced, and the quality of the synthesis gas is improved.

The invention discloses an anti-coking system for a material returning device of a biomass circulating fluidized bed gasifier. The system comprises a circulating fluidized bed gasification furnace used for biomass gasification, the upper portion of the circulating fluidized bed gasification furnace is communicated with a cyclone separator, the bottom end of the cyclone separator is communicated with a return feeder, an outlet of the return feeder is communicated with the circulating fluidized bed gasification furnace, and the side edge of the cyclone separator is communicated with an inclined chute. An inlet of the inclined chute is communicated with a quantitative feeder, the upper end of the quantitative feeder is communicated with a gate valve, an inlet of the gate valve is communicated with a hopper, an inlet of the hopper is communicated with a conveyor, an inlet of the conveyor is communicated with an elevator, and a high-melting-point ash feeding port is formed in the lower portion of the elevator. The biomass ash melting point at the coking position is changed, the coking problem is fundamentally solved, steam can be sprayed into the coking position for rapid cooling, and therefore the coking phenomenon is avoided.

The utility model discloses a biomass fluidized bed gasification system suitable for a downstream conversion device. The biomass fluidized bed gasification system comprises a fluidized bed gasification furnace, a cyclone separator, an oxidation cracking furnace, a venturi scrubber, a cyclone hydraulic separator and a water scrubber, the fluidized bed gasification furnace, the cyclone separator, the oxidation cracking furnace, the venturi scrubber, the hydrocyclone and the water scrubber are sequentially connected along the flow direction of synthesis gas to form a synthesis gas flow route; the system disclosed by the utility model adopts a chilling process, the water-vapor ratio can be about 0.8, a downstream conversion device does not need to be supplemented with water vapor, the consumption and the investment are saved, and the fluidized bed gasification furnace has a high-temperature oxidation area, so that tar can be fully cracked, and the energy consumption is reduced. The tar content at the outlet of the fluidized bed gasifier is effectively reduced or no tar exists at the outlet of the fluidized bed gasifier.

The invention belongs to the field of fluidized bed gasification processes, and particularly discloses a gasification process method for coupling a fluidized bed with a moving filter bed, which comprises the following steps: S1, adding a carbon-containing raw material into the moving filter bed; s2, the fluidized bed gasification furnace generates high-temperature crude synthesis gas; s3, introducing the high-temperature crude synthesis gas into a moving filter bed; s4, the moving filter bed adsorbs and filters fly ash in the high-temperature crude synthesis gas through a carbon-containing raw material, and purified synthesis gas is generated; s5, moving the carbon-containing raw material in the filter bed to generate pyrolysis gas and a carbonized material; s6, leading out the purified synthesis gas and the pyrolysis gas from the moving filter bed; and S7, leading out the carbonized material from the moving filter bed or returning the carbonized material to the fluidized bed gasifier. Through the coupling design of the fluidized bed and the moving filter bed, the carbon-containing raw material of the moving bed is driven to be pyrolyzed by using the waste heat of the synthesis gas, and the dust removal of the synthesis gas, the adsorption of harmful impurities and the pyrolysis recycling of the carbon-containing raw material are synchronously realized in a'one-bed dual-purpose 'mode; carbon resources in the fly ash can also be returned to the furnace for re-gasification, so that the effective gas yield is further improved.

The utility model relates to a jet bubbling fluidized bed gasifier with double gas chambers. The jet bubbling fluidized bed gasifier comprises a hearth, an upper gas chamber, a lower gas chamber and a grading deslagging ring pipe, the hearth comprises a pressure-bearing furnace shell and a fluidization distribution plate, a plurality of fluidization air holes are formed in the conical fluidization distribution plate, and the small-caliber end of the fluidization distribution plate is connected with the grading deslagging ring pipe; the hearth below the fluidization distribution plate is divided into the upper gas chamber and the lower gas chamber by a spacer, the top end of the spacer is connected to the fluidization distribution plate, and the bottom end of the spacer is connected to the side wall of the hearth; and the upper gas chamber and the lower gas chamber are respectively provided with a gasifying agent inlet and an ash discharge port. According to the fluidized bed gasifier provided by the invention, the lower part of the hearth is divided into the upper gas chamber and the lower gas chamber through the spacer, and other gases are introduced into one of the gas chambers, so that partial steam fluidization can be replaced, the use amount of steam and the discharge amount of wastewater are greatly reduced, the energy consumption is reduced, and the economic benefit is improved.

A method and a process arrangement for producing hydrocarbons from plastic-based raw material by a gasification in an integrated process The integrated process includes a gasification unit for forming a gasification product, a steam cracking unit for forming a cracking product and a recovery unit for recovering hydrocarbons. The plastic-based raw material is gasified with steam in the gasification unit having at least one fluidized bed gasifier and the gasification product is formed, the gasification product is cooled at least partly for slowing and / or stopping the chemical reactions after the gasification, The gasification product is supplied to a quench tower of the gasification unit in which the gasification product is treated and condensable components are removed from the gasification product forming a treated gasification product, and the treated gasification product and the cracking product of the steam cracking unit are supplied to the recovery unit for separating and recovering hydrocarbons.

The invention relates to a device and method for producing synthesis gas by gasifying fluidized bed gasification slag or CFB gasification fly ash, and belongs to the field of chemical synthesis gas. A circulating fluidized bed combustion chamber (1) is connected to a high-efficiency cyclone separator (3), the lower part of the high-efficiency cyclone separator (3) is connected to a fluidized bed gasification furnace (2), and the lower part of the fluidized bed gasification furnace (2) is connected to the circulating fluidized bed combustion chamber (1); the top of the high-efficiency cyclone separator (3) is connected to a superheater (4), an evaporator (5), an economizer (6), an air preheater (7) and an exhaust gas treatment device (8) in sequence; the synthesis gas outlet of the fluidized bed gasification furnace (2) is connected to a high-efficiency cyclone separator (9), the lower part of the high-efficiency cyclone separator (9) is connected to the fluidized bed gasification furnace (2), and the top of the high-efficiency cyclone separator (9) is connected to a evaporator (10), an air preheater (12) and a synthesis gas purification device (15) in sequence, and then hydrogen-rich synthesis gas is transported outward. The present invention can realize the preparation of hydrogen-rich synthesis gas by gasifying slag from an entrained flow bed or gasifying fly ash from a CFB gasification bed, thereby achieving high-value utilization.

A device and method for co-producing H2 by coupling biomass gasification with large-scale coal-fired power generation belongs to the fields of chemical industry and power generation. A biomass circulating fluidized bed gasifier is connected to a high-efficiency cyclone separator 1, which is connected to a differential fluidized bed gasifier, which is connected to the biomass circulating fluidized bed gasifier. The high-efficiency cyclone separator 1 is connected to a large-scale coal-fired power generation boiler via a second superheater and a high-temperature gas blower. The differential fluidized bed gasifier is connected to a second high-efficiency cyclone separator, which is connected to the differential fluidized bed gasifier. The high-efficiency cyclone separator 2 is connected to an air preheater 3, a first superheater, a dust collector, a high-temperature steam shift reactor, a second air preheater, a low-temperature steam shift reactor, a first air preheater, a condenser, an organic amine scrubber, a compressor, a pressure swing adsorption system, and a large-scale coal-fired power generation boiler. This invention can achieve high-value utilization of biomass gasification hydrogen production.

The invention provides a biomass circulating fluidized bed gasification furnace ash discharge device, which belongs to the technical field of biomass gasification, and comprises a gasification furnace lifting pipe, a slag cooler and a dust removal device, the slag cooler is arranged at the bottom of the gasification furnace lifting pipe, and a slag discharging pipe used for being communicated with the gasification furnace lifting pipe is arranged on the slag cooler; the dust removal device is arranged on the gasification furnace lifting pipe and used for separating fly ash, a fly ash pipeline is arranged on the dust removal device, and the fly ash pipeline is communicated with the slag discharging pipe. Ash slag in a lifting pipe of the gasification furnace is conveyed into the slag cooler through the slag discharging pipe, fly ash separated by the dust removal device is conveyed into the slag discharging pipe through the fly ash pipeline, the fly ash and the ash slag of the gasification furnace are combined and are cooled and discharged through the slag cooler, so that an ash slag discharging system of the gasification furnace is simplified, the operation is safe, and the equipment cost is reduced. The ash discharging device of the biomass circulating fluidized bed gasification furnace solves the problems that in the prior art, an ash discharging device of a gasification furnace is complex in structure and high in failure rate.

The invention provides a system and method for coupling garbage grading pyrolysis gasification with a pulverized coal boiler. A solid substance inlet of a drying kiln is used for introducing household garbage for drying; a solid substance outlet of the drying kiln communicates with a solid substance inlet of the pyrolysis kiln and is used for performing pyrolysis treatment on the dried household garbage to obtain pyrolysis oil gas and garbage carbon; a pyrolysis substance outlet of the pyrolysis kiln is communicated with a gasified substance inlet of the fluidized bed gasification furnace and is used for carrying out gasification treatment on pyrolysis oil gas and garbage carbon to obtain combustible gas, a combustible gas outlet of the fluidized bed gasification furnace is communicated with a hearth of the coal-fired boiler for combustion power generation, and a flue gas outlet of the coal-fired boiler is communicated with an inlet of the flue gas treatment system. The garbage grading pyrolysis gasification system and the coal-fired power generation unit are deeply coupled, efficient garbage cleaning treatment and resource utilization are achieved, the energy utilization rate is increased, and pollutant emission is reduced.

The present invention relates to a pulverized coal circulating fluidized bed catalytic gasification device and method, and discloses a device for increasing methane production by pulverized coal circulating fluidized bed catalytic gasification, comprising: a feeder; a fluidized bed pyrolysis furnace connected to the feeder through a feed inclined pipe; a fluidized bed gasification furnace connected to the fluidized bed pyrolysis furnace through a pyrolysis inclined pipe; a fast bed gasification furnace, the lower inlet of which is connected to the upper outlet of the fluidized bed gasification furnace; a fluidized bed combustion chamber, the upper inlet of which is connected to the lower outlet of the fluidized bed gasification furnace; a fine powder settling / stripper connected to the fluidized bed pyrolysis furnace through a gasification inclined pipe. The present invention also discloses a method for increasing methane production by pulverized coal circulating fluidized bed catalytic gasification. The present invention has the characteristics of high carbon conversion rate, high gasification intensity, high pulverized coal utilization rate, wide adaptability of gasified coal types, reasonable energy utilization, and stable and efficient operation of the device.

A double fluidized bed reactor system including a staircase-type helical blade is proposed. The system includes a bubbling fluidized bed gasification furnace for receiving fuel (for example, combustible waste and biomass) and steam, forming a bubbling fluidized bed through a flow of flow medium therein, and gasifying the fuel, thereby generating a resultant gas, and a high-speed fluidized bed combustion furnace for receiving char of the resultant gas and the flow medium from the bubbling fluidized bed gasification furnace, additionally receiving air, combusting the char so as to heat the flow medium, and transferring the heated flow medium back to the bubbling fluidized bed gasification furnace.

This utility model discloses a fluidized bed gasification system, which includes a fluidized bed gasifier and a cooling device, a first dust removal device, and a cooling and scrubbing device connected in series at the syngas outlet of the fluidized bed gasifier. The cooling device is used to cool the syngas flowing out of the syngas outlet of the fluidized bed gasifier. The first dust removal device is used to collect fly ash from the syngas flowing out of the cooling device. The cooling and scrubbing device is used to wash the fly ash from the syngas flowing out of the first dust removal device. Based on the fluidized bed gasification system of this utility model, the resulting net syngas has a high CO content, low H2 and CO2 content, small wastewater and circulating water volume, low syngas dew point, and low heat loss from the gasifier.

The present application discloses a fluidized bed gasification furnace ash cooling tank, which is used to cool the high-temperature ash discharged from the fluidized bed gasification furnace. It includes a main tank body, a cooling chamber is formed in the main tank body, and an ash inlet channel and an ash outlet channel are formed at the upper and lower ends of the cooling chamber respectively. The ash enters the cooling chamber from the ash inlet channel to be cooled and is finally discharged from the ash outlet channel. A partition is fixedly installed inside the main tank body, the partition includes a gathering member and a guide member, the gathering member is arranged to gradually reduce in diameter from top to bottom to tend to form a cone, and the ash is cooled on the side wall of the gathering member by the cooling liquid output from at least one first cooling liquid spraying member, and the generated ash vapor will escape along the side wall of the cooling chamber, gather at the top of the cooling chamber, and finally be discharged through at least one exhaust pipe installed on the periphery of the ash inlet channel, so as to prevent the ash vapor from entering the ash inlet channel and affecting the slag discharge of the fluidized bed gasification furnace.

The utility model discloses a coal gasification treatment system for coupling a circulating fluidized bed gasification furnace with a carbon residue furnace, which is used for carrying out coal gasification treatment on pulverized coal and comprises a circulating fluidized bed gasification furnace coal gas production system and a circulating fluidized bed carbon residue furnace waste heat recovery system coupled with the circulating fluidized bed gasification furnace coal gas production system, the circulating fluidized bed gasification furnace coal gas production system comprises a gasification furnace system, a waste heat recovery system and a first dust removal and purification system, and the circulating fluidized bed carbon residue furnace waste heat recovery system comprises a carbon residue furnace system, a waste heat recovery and denitration system and a second dust removal and purification system. According to the utility model, the circulating fluidized bed gasification furnace system is coupled with the carbon residue furnace system, so that the heat value of fly ash is fully utilized, and the carbon utilization rate and economic benefit of raw coal are greatly improved.

This utility model discloses a circulating fluidized bed gasifier, a CO2-captured cement production line, and a gypsum decomposition system. The cement production line, by modifying the decomposition furnace structure and adding a circulating feed pipe, a jacketed circulating fluidized bed gasifier, and a green hydrogen system, achieves high-concentration carbon dioxide capture and alternative fuel recycling. The industrial by-product gypsum decomposition system uses an electromagnetically heated decomposition furnace, gasification coupling, and a green hydrogen system for power supply, achieving co-production of sulfuric acid and lime with low carbon emissions. Both the cement production line and the industrial by-product gypsum decomposition system convert carbon dioxide into combustible gas for their own combustion through a jacketed circulating fluidized bed gasifier, combined with green electricity-to-hydrogen technology, completely solving the problems of fuel cost and carbon emissions. This system features high capture efficiency, low energy consumption, and compact equipment, making it suitable for large-scale industrial applications.

The utility model discloses a cooling device for a biomass pressurized fluidized bed gasifier inlet, which comprises a clamping flange forge piece, a jacket outer pipe, a jacket core pipe and a jacket inner pipe, the jacket outer pipe and the jacket inner pipe are coaxially arranged, the jacket inner pipe is positioned in the jacket outer pipe, the jacket core pipe is arranged between the jacket outer pipe and the jacket inner pipe, and the jacket inner pipe is positioned in the jacket outer pipe. A first cooling liquid flow channel is formed between the jacket outer pipe and the jacket core pipe, a second cooling liquid flow channel is formed between the jacket inner pipe and the jacket core pipe, the same ends of the jacket outer pipe, the jacket core pipe and the jacket inner pipe are fixedly connected with the clamping flange forge piece, and the other ends of the jacket outer pipe and the jacket inner pipe are fixed on the sealing plate. The cooling device disclosed by the utility model can be used as an extension part of the screw rod cooling jacket of the screw conveyer towards the inside of the gasification furnace, so that the temperature at the inlet of the biomass gasification furnace can be effectively reduced, the material selection range is favorably increased, and the total cost is reduced.

Biomass drum carbonization poly-generation coupled steam gasification hydrogen production device and method, belonging to the fields of chemical engineering and power generation. The gas outlet of the drum carbonizer is connected to the gas burner through an air-tar cooler, a multi-stage indirect water-cooled wood vinegar liquid cooler, and a wood vinegar liquid spray tower. The high-temperature flue gas outlet of the furnace is connected to the circulating fluidized bed. The circulating fluidized bed is connected to a high-efficiency cyclone separator I. The ash discharge port of the high-efficiency cyclone separator I is connected to the ash inlet of the differential fluidized bed gasifier. The biomass carbon outlet of the drum carbonizer is connected to the feed inlet of the differential fluidized bed gasifier. The ash discharge port of the differential fluidized bed gasifier is connected to the lower part of the circulating fluidized bed. The differential fluidized bed gasifier is sequentially connected to a high-efficiency cyclone separator II, a superheater, an air preheater III, a dust collector, a high-temperature steam conversion reactor, an air preheater II, a low-temperature steam conversion reactor, an air preheater I, a condenser, an organic amine scrubber, a compressor, and a pressure swing adsorption system. The present invention is used for biomass gasification hydrogen production.

The utility model provides a gas distributor and a fluidized bed gasifier. The gas distributor comprises a gas distribution plate and an annular pipe, the gas distribution plate is a conical distribution plate, a narrow opening is formed in the bottom of the conical distribution plate, and a wide opening is formed in the top of the conical distribution plate; the conical distribution plate is provided with a plurality of rows of through holes arranged along the circumferential direction of the conical distribution plate; the central axis extension lines of at least part of the through holes intersect with the axis of the conical distribution plate; the central axis extension lines of at least part of the through holes deviate from the axis of the conical distribution plate to form a first preset angle; and the narrow opening is connected with the ring pipe through a first turning joint. The gas distributor disclosed by the utility model can optimize a gas flowing path and promote the mixing of gas and materials through the venturi tube. And the stress generated by thermal expansion, pressure change or mechanical vibration and the like can be effectively absorbed and dispersed, so that the gas distribution plate and the annular pipe are protected from being damaged by stress concentration.

The utility model discloses a fluidized bed gasification furnace capable of cleaning the inside, which relates to the technical field of fluidized bed gasification furnaces and comprises a main body furnace and a cleaning mechanism, and the cleaning mechanism for cleaning the inner wall is arranged in the middle of the inner side of the main body furnace. And the cleaning mechanism comprises a gear motor, a rotating shaft, connecting rods, mounting heads, scraping plates, brush plates and connecting springs, the output end of the gear motor is connected with the rotating shaft, the two sides of the rotating shaft are connected with the connecting rods, and the mounting heads are fixed to the front ends of the connecting rods. Compared with an existing device, according to the fluidized bed gasification furnace capable of cleaning the interior, through cooperation of all parts of the cleaning mechanism, after long-time work, residues on the inner wall can be scraped firstly, then cleaning treatment is conducted, and the cleanliness of the interior of the main body furnace is guaranteed through double automatic cleaning; and dust and slag are prevented from being accumulated in the main body furnace to influence the stable use of the subsequent furnace body, and meanwhile, the trouble of manual cleaning is also reduced.

The invention relates to the technical field of biomass energy utilization and metallurgical reduction, in particular to a system and a method for coupling multi-stage grading biomass gasification with iron ore powder reduction, which comprises a multi-stage grading fluidized bed gasifier connected with a waste heat boiler through a pipeline, the waste heat boiler is connected with the reduction reactor through a pipeline, the lower end of the reduction reactor is connected with the product tank through a pipeline, the upper end of the reduction reactor is connected with the external cyclone separator through a pipeline, and the external cyclone separator is connected with the water scrubbing tower through a pipeline. The lower end of the external cyclone separator is connected with a material returning device through a pipeline, the material returning device is connected with the reduction reactor through a pipeline, the equipment has high integration, the technological process is compact and efficient, the carbon emission is low, the efficient gasification technology and the fluidized bed reduction technology are organically coupled, the whole technological process does not need to depend on coke, and the energy consumption is low. And the external carbon emission is extremely low.