50 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 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 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 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 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.

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.

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.

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.

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.

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.

The invention relates to a pulverized coal fluidized bed gasifier and an operation method, in particular to a pulverized coal fluidized bed gasifier capable of improving circulation ratio and an operation method. The invention aims to solve the problems of high specific coal consumption and low carbon conversion rate caused by the fact that gas in the gasification furnace flows back into a blanking pipe and the circulating ratio of fly ash is too low. The material return unit is installed in the material return pipe, the pressure is reduced and the speed is increased after a water vapor laval nozzle is sprayed, and circulating ash at the inlet of the gradually-shrinking inlet section is injected into the second throat pipe. Mixed working media are violently mixed in the second throat pipe, and the speed is reduced after energy and momentum exchange, so that the pressure in the material return pipe is increased, and airflow in the furnace is prevented from reversely flowing to the cyclone separator; meanwhile, more fly ash particles are introduced into the gasification furnace, so that the carbon content of fly ash is reduced, the amount of ash circulating back to the gasification furnace is increased, and the carbon conversion rate is improved. The method is applied to the fields of production of chemical synthesis or fuel oil synthesis feed gas, industrial fuel gas, civil gas, metallurgical reducing gas, combined cycle power generation fuel gas and the like.

The present application provides a high-temperature fuel gas dust removal and fuel gas delivery system, method and related products, the system comprising: a circulating fluidized bed gasifier obtaining first attribute information of target biomass, obtaining a target operating mode of the gas boiler, determining a first operating parameter corresponding to the first attribute information and the target operating mode, controlling the circulating fluidized bed gasifier to operate with the first operating parameter, and converting the target biomass into a first high-temperature fuel gas; a dust collector obtaining second attribute information of the first high-temperature fuel gas, determining a second preset temperature range corresponding to the second attribute information; determining a second operating parameter corresponding to the second attribute information; controlling the temperature of the dust removal environment within the second preset temperature range, and controlling the dust collector to remove dust from the first high-temperature fuel gas with the second operating parameter to obtain a second high-temperature fuel gas; and a delivery pipeline delivering the second high-temperature fuel gas to the gas boiler so that the second high-temperature fuel gas is burned by the gas boiler.

The utility model discloses a high-temperature spiral conveyer for a biomass pressurized fluidized bed gasifier, which comprises a shell, a spiral blade arranged in the shell, a motor fixed at one end of the shell and connected with the spiral blade, and a self-balancing component, and the self-balancing component comprises a multi-connecting-rod component and a configuration block, one end of the multi-connecting-rod component is fixedly hinged to the shell, the other end of the multi-connecting-rod component is hinged to the shell and can move in the axial direction of the shell, and the configuration block is connected to the movable end of the multi-connecting-rod component. The self-balancing assembly is connected to the shell and comprises the multi-connecting-rod component and the balancing weight, when one end of the shell is likely to expand and deform, deformation force is transmitted to the multi-connecting-rod component, and therefore the other end of the multi-connecting-rod component ascends or descends synchronously. The force acting on the inlet end and the outlet end is also uniformly distributed, so that the situation that the high-temperature spiral conveyor for the biomass pressurized fluidized bed gasification furnace is torn due to overlarge stress at the pipe orifice, and further leakage is caused is avoided.

Systems and methods are provided for solid gasification that incorporates at least two reactors. The first reactor may include a fluidized bed gasifier for solids conversion into synthesis gas (i.e., syngas), methane (CH4), tar, and char. The gasified products are passed through at least one cyclone filter. Dipleg effluent including at least a portion of the char is passed into a first zone of the second reactor, which comprises a multi-zone thermal reformer.

The application relates to the technical field of SAF preparation, in particular to a biomass gasification SAF preparation process and device, which comprises a gasification furnace, a condensing device, an SAF synthesizing device, a hydrogenation isomerization device, an SAF separating device, an electrolytic water device and a waste heat power generation device. The method produces synthesis gas by gasifying biomass particles through a double-flow fluidized bed gasification furnace, produces hydrogen and oxygen by driving an electrolytic water hydrogen production device through renewable energy, provides oxygen to the gasification furnace, generates crude SAF by one-step F-T reaction of the synthesis gas and the hydrogen, and generates qualified SAF and biodiesel by hydrogenation isomerization and separation. The hydrogen produced by electrolytic water can be liquefied and stored through a liquid hydrogen device, hydrogen is supplemented according to the renewable energy condition, and the stability of hydrogen supply is adjusted. The method has the characteristics of simple process flow, low device operation energy consumption, good economy and the like, and has the advantages of liquid hydrogen energy storage and renewable energy fluctuation adaptation.

The invention relates to the field of energy conservation and emission reduction, and discloses an inductive fluidized bed gasifier, an inductive fluidized bed gasification reaction system and an inductive fluidized bed gasification reaction method. The inductance fluidized bed gasification furnace comprises an inductance fluidized bed gasification furnace body, and an inductance heating section 2 is arranged in the inductance fluidized bed gasification furnace body 1; the inductive heating section 2 comprises an induction coil 4 and a conducting medium 10, and the induction coil 4 is wound outside the conducting medium 10; and the inductance heating section 2 provides heat required in the gasification process. According to the inductance fluidized bed gasification furnace, the inductance heating section is arranged in the inductance fluidized bed gasification furnace body, the inductance heating technology and the fluidized bed gasification technology are coupled, heat needed by gasification reaction is provided through the inductance heating conducting medium, the process is simple, instant switching is achieved, compared with a traditional heating mode, the heating speed is higher, the carbon conversion rate is high, and energy consumption is reduced; and the method has great potential for energy conservation and emission reduction.

The application discloses a sludge flash drying system integrated with a fluidized bed gasification furnace, which comprises a wet sludge conveying subsystem, an outlet of the wet sludge conveying subsystem is communicated with an inlet of a sludge flash drying subsystem, an outlet of the sludge flash drying subsystem is connected with an inlet of a gas-solid separator, an outlet of the gas-solid separator is communicated with an inlet of a dry sludge conveying subsystem, an outlet of the dry sludge conveying subsystem is communicated with an inlet of a fluidized bed gasification furnace subsystem, an outlet of the fluidized bed gasification furnace subsystem is communicated with a gas-gas heat exchanger, an outlet of the gas-gas heat exchanger is communicated with an inlet of an external combustion chamber, and an outlet of the external combustion chamber is communicated with a drying gas inlet of the sludge flash drying subsystem. The application recycles the heat value generated in the sludge gasification process for sludge flash drying, so that the energy consumption is low, and the economic cost of system operation is reduced. Due to the high sludge drying efficiency and the strong sludge disposal capacity, the resourceization, reduction and efficient clean utilization of sludge can be realized.

This invention relates to a method and apparatus for the gasification, deoiling, and roasting of oil-containing waste catalysts in the field of hazardous waste disposal and utilization technology. The apparatus includes a fluidized bed gasifier, a secondary combustion chamber, a rotary kiln, an ignition burner, a supplementary combustion burner, a deoiled material conveying device, a mixing and feeding device, a waste heat boiler, an air preheating device, a blower, a quench tower, a dust collector, a deacidification tower, a flue gas reheater, an induced draft fan, a chimney, and a flue gas recirculation fan. This invention belongs to a pyrometallurgical process for the disposal and utilization of oil-containing waste catalysts. Through the method described in this invention, oil-containing waste catalysts are deoiled in a fluidized bed gasifier to produce combustible gas and deoiled material. The heat generated after the combustible gas is fully combusted in the secondary combustion chamber enters the rotary kiln to roast the mixture of the deoiled material and alkaline materials, generating sodium-based material. The subsequent treatment process of the sodium-based material discharged from the rotary kiln is not within the scope of this invention. The flue gas discharged from the rotary kiln undergoes purification treatment such as dust removal and acid removal in subsequent flue gas treatment processes, thereby achieving ultra-low emission standards. This invention achieves efficient recovery and utilization of precious metals from waste catalysts using a low-cost, low-energy pyrometallurgical process.

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 utility model discloses a Zhundong coal fluidized bed-entrained-flow bed two-section type grading gasification system. Relates to the technical field of coal chemical industry. A fluidized bed gasifier is provided with a fluidized bed coal feeding port, and the bottom of the fluidized bed gasifier is provided with a slag discharging pipe; the first-stage cyclone separator is communicated with the fluidized bed gasification furnace, and the first-stage cyclone separator is communicated with the second-stage cyclone separator; the fly ash storage tank is communicated with the secondary cyclone separator; a nitrogen inlet and a nitrogen outlet are formed in the fly ash storage tank; a high-temperature coal gas chiller is arranged at the top of the entrained-flow bed gasification furnace, an entrained-flow bed high-temperature nozzle is arranged on the entrained-flow bed gasification furnace, and the entrained-flow bed high-temperature nozzle is communicated with a fly ash storage tank; a gasification fan is arranged on the treatment assembly, the treatment assembly is communicated with the fluidized bed gasification furnace, the treatment assembly is sequentially communicated with a bag-type dust collector, a coal gas cooler and a chilling fan, and the chilling fan is communicated with a high-temperature coal gas chiller. The coal grading conversion device can realize coal grading conversion, save system energy consumption, eliminate fly ash and improve system carbon conversion rate.

This invention discloses a coal catalytic gasification system, comprising a fluidized bed gasification system, a slag tank, and an underground gasifier. The slag discharge port of the fluidized bed gasifier and the discharge port of the dust removal device of the fluidized bed gasification system are both connected to the inlet of the slag tank. The discharge port of the slag tank is connected to the air inlet of the underground gasifier. The air outlet of the underground gasifier is connected to the air inlet of the dust removal device via a pipeline. The advantages are: combining the fluidized bed gasifier and the underground gasifier allows the solids in the crude coal gas products obtained from both gasifiers to be returned to the slag tank, and combined with the ash and slag discharged from the bottom of the fluidized bed gasifier, which is then transported to the underground gasifier, reducing ash and slag emissions from the fluidized bed gasifier and minimizing environmental pollution; simultaneously, the low-cost catalyst in the ash and slag of the catalytic gasifier plays a further catalytic role in the underground gasifier, increasing the reaction intensity and maximizing the utilization of the low-cost catalyst.

The invention relates to a biomass gasification system and a gasification method. The gasification system 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 gasification 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 invention couples the advantages of the fluidized bed and the 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 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.

The invention relates to a system and a method for preparing methanol by coupling biomass gasification direct combustion with green hydrogen, in particular to the crossing field of renewable energy sources and chemical engineering technologies. The system comprises a biomass gasification unit, a direct-combustion power generation unit, a green hydrogen preparation unit and a methanol synthesis unit, wherein a fluidized bed gasification furnace of the biomass gasification unit is connected with a combustion chamber of the direct-combustion power generation unit and a mixer of the methanol synthesis unit in a shunting manner through a high-temperature synthesis gas pipeline; a hydrogen outlet of the green hydrogen preparation unit is connected with the mixer. The method comprises the following steps: carrying out oxygen-enriched gasification on biomass at 750-900 DEG C to generate synthesis gas; 40-60% of synthesis gas is directly combusted to generate power for the system; mixing the residual synthesis gas with electrolyzed water green hydrogen; and pressurizing the mixed gas, and catalytically synthesizing methanol at 220-280 DEG C. All components of the biomass are efficiently utilized, the energy efficiency exceeds 60%, the methanol yield reaches 0.5 ton per ton of biomass, the carbon emission is reduced to 0.1 ton per ton of methanol or below, and the method is obviously superior to a traditional process.

This disclosure relates to the field of coal chemical technology, and provides a raw material pretreatment method and system for a fluidized bed gasifier. The raw material pretreatment method for the fluidized bed gasifier involves pre-crushing the raw coal and / or solid waste to obtain pulverized coal, thereby increasing the contact area; the pulverized coal is then fed into a pretreatment unit for further crushing, water removal, and reduction of oxygen-containing functional groups to obtain pulverized coal, improving its hydrophobicity and giving it good slurry-forming properties; the pulverized coal is then fed into a washing unit for washing to remove water-soluble cations, obtaining wet pulverized coal, thus preventing cations from affecting the flowability of the coal-water slurry produced from the pulverized coal; the wet pulverized coal is then fed into a slurry preparation unit to obtain coal-water slurry. This multi-step treatment process allows for the production of coal-water slurry that meets technical parameters from inexpensive but low-quality raw coal and / or inexpensive solid waste, broadening the range of raw material selection for coal-water slurry gasification and reducing the cost of the coal-water slurry gasification process.

The invention relates to a fluidized bed gasification system and a control method. The fluidized bed gasification system comprises a conveying tank, a conveying pipeline, a gasification furnace and a control assembly, the conveying tank is provided with an ash outlet, the gasification furnace is provided with an ash return opening, and the ash outlet and the ash return opening are connected through the conveying pipeline; the conveying tank is used for conveying fly ash to the gasification furnace; an accelerator and a control valve are arranged on the conveying pipeline; the accelerator is sequentially and coaxially provided with a pressure-bearing pipeline layer, a ventilation layer and a supporting framework layer from outside to inside, and the pressure-bearing pipeline layer is connected with a gas conveying pipeline. A stop valve is arranged on the gas pipeline; and the control valve is arranged at the downstream of the accelerator. According to the circulating control system of the fluidized bed gasifier, gas and solid phases are fully mixed by utilizing the accelerator, and then parameters such as downstream speed and density are measured, so that the flow of powder returning gas is greatly reduced, gasification reaction is facilitated, and the conversion rate of gasified carbon is greatly improved.