431results about "Gasification processes details" patented technology

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.

Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves pyrolyzing one or more waste plastics into various pyrolysis products, including a carbon solids-containing pyrolysis residue, and then subjecting the pyrolysis residue to partial oxidation gasification to thereby form a syngas composition.

A system comprising a gasifier comprising one or more burners configured to accept a carbonaceous fuel and an oxidant to produce a syngas and a molten slag; a throat configured to accept the syngas and molten slag from the gasifier; and a radiant syngas cooler positioned below the gasifier configured to accept the syngas and molten slag from the throat; wherein the throat comprises an outer wall and one or more fins extending radially inwards from the outer wall.

The invention relates to the technical field of catalyst sulfuration in a coal gasification process, and particularly discloses a method for sulfuration of a shift catalyst by adding sulfur into low-sulfur coal, and the method comprises the following steps: fully mixing byproduct sulfur with boiler slag by adopting an internal mixing process to prepare a slag-sulfur mixture; fully and uniformly mixing the slag-sulfur mixture with low-sulfur coal, and feeding the mixture into a coal mill for milling to obtain pulverized coal; the method comprises the following steps: in a coal gasifier, carrying out online vulcanization on a shift catalyst by using pulverized coal, setting slag sampling once every half an hour after adding a slag-sulfur mixture, and monitoring the H2S concentration, the ash water pH value and the sulfate radical concentration in the synthesis gas in real time. According to the method, the by-product sulfur and the boiler slag are subjected to banburying compounding to prepare the slag-sulfur mixture, the slag-sulfur mixture and the low-sulfur coal are uniformly mixed in proportion to prepare powder, and by controlling the outlet temperature of the coal mill, the circulating air volume and the pressurized conveying temperature, the stable combustion of the coal powder and the on-line vulcanization of the shift catalyst are realized.

The invention relates to the technical field of coal chemical industry, in particular to a method for evaluating the slag quantity of a dry pulverized coal gasifier in real time, which comprises the following steps: arranging a thermometer in a slag pool of the dry pulverized coal gasifier, arranging a thermometer and a flowmeter behind a quenching water heat exchanger, and arranging a regulating valve on a cooling water outlet pipeline of the quenching water heat exchanger; adjusting the outlet flow Q of the slag water circulating pump to be a constant value according to the reading of the flowmeter; the temperature t of the quenching water after the quenching water heat exchanger is controlled to be a constant value by using a regulating valve and a temperature controller of a cooling water outlet pipeline; based on the principle that the specific heat capacity of quenching water and molten slag and the temperature of the molten slag before quenching are constant, the real-time slag production amount of the gasifier is calculated through a preset formula, the method for evaluating the slag production amount of the dry pulverized coal gasifier in real time can evaluate the slag production amount of the dry pulverized coal gasifier in real time, guide personnel to carry out as-fired coal operation adjustment, and improve the slag production amount of the dry pulverized coal gasifier. Frequent fluctuation of the slag yield of the gasifier is avoided, and safe and stable operation of the burner cover and the slag conveyor is ensured.

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 relates to the technical field of biomass gasification furnaces, and discloses a biomass gasification furnace with a sealed drying system, the biomass gasification furnace comprises a biomass gasification furnace, the lower surface of the biomass gasification furnace is provided with a connecting pipe, and the top of the biomass gasification furnace is provided with a sealing part; the sealing component comprises a fixing plate, the end of the fixing plate is fixedly connected with the surface of the biomass gasifier, the top of the fixing plate is fixedly connected with a hydraulic rod, the telescopic end of the hydraulic rod is fixedly connected with a linkage plate, and the end, away from the hydraulic rod, of the linkage plate is fixedly connected with a lifting disc. When a hydraulic rod moves, a linkage plate is connected with a lifting disc to drive a sealing disc to move upwards, when the sealing disc moves, the sealing disc is separated from the inner wall of the biomass gasification furnace, and at the moment, biomass raw materials can be put into the biomass gasification furnace to be subjected to drying combustion treatment; and the hydraulic rod moves downwards to push the sealing disc to enter the biomass gasification furnace, and the sealing disc is used for sealing the top of the biomass gasification furnace.

A system for processing solid waste including a segmented gasifier having a first segment detachably connected to a second segment, and a burner positioned downstream of the segmented gasifier and coupled to the segmented gasifier. A process for treating solid waste including introducing the solid waste into a first end of a segmented gasifier having a first segment detachably connected to a second segment. Gasifying the solid waste as it traverses from the first end of the gasifier to a second end of the segmented gasifier, and producing a gaseous output and a solid output at the second end of the segmented gasifier. Separating the gaseous output and the solid output, and introducing a portion of the gaseous output to a burner and recycling a portion of the gaseous output to the segmented gasifier as an energy source.

A method of processing a material comprising: receiving an input material to be processed within a reaction chamber, the input material comprising a biosolids material; energizing one or more sets of electrodes, each set of electrodes including an anode electrode and a cathode electrode, each anode electrode and cathode electrode having an electrode tip exposed to the reaction chamber; and creating an electrical arc between the anode electrode tip and the cathode electrode tip within the reaction chamber to subject at least some of the input material to electrical arcing, thereby reacting at least a portion of the biosolids material and forming a processed material comprising hydrogen (H2) and carbon monoxide (CO).

Gasification processes are disclosed, which can implement one or more strategies for heating and humidifying the gasifier effluent, as needed for effective hydrogen enrichment through the water-gas shift (WGS) reaction that converts H2O. Particular aspects, in carrying out these strategies, relate to the use of an evaporator upstream of a WGS reactor and operating at a comparable pressure (e.g., at least about 10 bar, at least about 20 bar, or at least about 30 bar, such as in a range from about 30 bar to about 100 bar). Such high-pressure evaporator may provide sufficient water vapor content, for effective generation of H2 via the WGS reaction, as needed for downstream uses. Advantageously, heat and / or material (e.g., condensate) sources may be available within the process itself, and integrated to meet at least some of the operational demands of the evaporator.

A method of producing a gas from a combustible material is provided. The method comprises the steps of loading the combustible material into a containment structure and sealing it therein. An oxidant is fed into the sealed containment structure with a controlled flow rate and a controlled rate of movement such that the combustible material is partly converted, thereby leaving behind thermally affected layers of combustible material after the injection point has passed through the material. At least some of the combustible material is converted into molten slag and or char that accumulates as the bottom-most thermally affected layer and subsequently cools and solidifies. The method is characterised in that it further includes the step of discharging solid slag and or char in the bottom-most thermally affected layer from under material that remains in the containment structure to remove solid slag and or char from the containment structure.

The invention relates to the technical field of pyrolysis gasification, in particular to a biomass directional gasification and synthesis gas quality improvement system which comprises a raw material intrinsic feature analysis module, a path decision and scheme generation module, a primary synthesis gas preparation module, a quality fingerprint acquisition module, a deviation feature extraction module and a gasification path deviation correction module. Analyzing intrinsic characteristic data of the biomass raw material; a gasification reaction path of the intrinsic characteristic data is decided, and a predictive gasification control scheme is obtained; directionally guiding thermal chemical conversion to obtain primary synthesis gas flow; analyzing the key component concentration and tar characteristic molecular marker content in the primary synthesis gas flow to obtain synthesis gas quality real-time fingerprint data; performing coupling degree analysis on the synthesis gas quality real-time fingerprint data and an expected orientation path to obtain an overall deviation characteristic; performing path deviation correction on the actual reaction path of the primary synthesis gas flow to obtain a high-quality synthesis gas product; the method can improve the quality of the synthesis gas.

Provided are a gasification furnace operating method, a gasification furnace, a two-stage gasification apparatus, a gasification method for an organic raw material, and a two-stage gasification method for organic waste that make it possible to stably operate a gasification furnace over a long period of time. The present invention provides a gasification furnace operating method including, in a gasification furnace into which an organic raw material is introduced and that produces gas and slag, directly or indirectly introducing an alkali metal-containing compound into the gasification furnace to reduce the viscosity of the slag.

The invention relates to the technical field of biomass resource utilization, in particular to a three-waste treatment method for a synthesis gas production process and a biomass conversion process. According to the method, the waste residues generated by a biomass conversion process are used as gasification raw materials of the synthesis gas, so that the content of effective synthesis gas in the synthesis gas is increased, the content of impurity gas in the synthesis gas is reduced, the waste residues can be effectively utilized, and effective utilization of resources is realized.

An apparatus includes at least one container with at least one carbonaceous material inlet, at an upper end of the container, for providing carbonaceous material into an internal chamber of the container; at least one first carbonaceous material outlet, at a lower end of the container, for removing carbonaceous material from the internal chamber; and at least one gas outlet for removing gas from the internal chamber. The internal chamber includes a first carbonaceous material communication pathway between the carbonaceous material inlet and the first carbonaceous material outlet, and carbonaceous material which travels along the first carbonaceous material communication pathway in use at least passes consecutively through a first reduction zone, a first oxidation zone, and a second reduction zone.

To provide a vertical carbonization furnace capable of controlling a carbonization rate and being efficient.SOLUTION: A carbonization furnace which is a carbonization furnace 20 that produces carbide from an organic material by supplying the organic material includes: an organic material combustion region A1 where oxygen is supplied to an upper part of the organic material heaped up inside, part of the organic material is combusted, and a temperature of the carbonization furnace is maintained at a high temperature; a carbonization region A2 provided below the organic material combustion region and where the organic material is carbonized; and a steam supply section that causes high temperature steam to pass around an outer periphery of the organic material combustion region and / or causes, using a steam supply pipe, high temperature steam to pass from an upper part of the organic material combustion region throughout the organic material combustion region, further heats up by thermal energy of the organic material combustion region, produces superheated steam having a high temperature equal to or higher than a temperature enough to exert a high temperature carbonization facilitating effect with respect to an organic material, and supplies the superheated steam to the organic material in the organic material combustion region.SELECTED DRAWING: Figure 1

A pressurized gasification device adopting heat storage and supply comprises a pure oxygen pipe, a pulverized coal pipe, a cyclone combustion cylinder, a heat storage device I, a heat storage device II, a gasification agent pipe, a temperature detector, a high-pressure fan, a gasification agent nozzle, a gasification furnace, a gasification furnace grate, a coal bunker, a coal lock, a coal lock upper valve, a coal lock lower valve, a chilling chamber and a slag pool. High-temperature flue gas generated by pure oxygen combustion of pulverized coal enters the heat storage device for heat storage, heat is transmitted to a gasifying agent and then is fed into the gasification furnace, the situation that conventional air combustion influences the efficiency of the gasification furnace and direct combustion of lump coal in the gasification furnace is avoided, the operation cost of the gasification furnace is reduced, meanwhile, heat is provided for the gasification furnace in an external heat supply mode, and energy is saved. The operation flexibility of the gasifier is improved.

A gasification device capable of improving a gasification efficiency by causing impalpable particles in a produced gas to remain in a furnace without taking those out from the furnace, and of reducing a time necessary for the maintenance of a filter, etc., by preventing carbon compositions not gasified from flowing out. A gasification device includes a rotary kiln type horizontal gasification furnace 1, a vertical gasification furnace 2 that includes a vertical gasification furnace supplying port to supply, from the horizontal gasification furnace 1, carbon compositions not gasified, and a vertical gasification furnace ejecting port that ejects the carbon compositions not gasified, a gasification furnace discharging port 29 for discharging the gas, horizontal gasification furnace water vapor supplying means 13 and vertical gasification furnace water vapor supply means 23 for supplying water vapor in the horizontal gasification furnace 1 and in the vertical gasification furnace 2, respectively, water vapor and oxygen mixing means for mixing oxygen with the water vapor supplied to the gasification furnace, and gasification furnace heating means for heating the horizontal gasification furnace and the vertical gasification furnace, respectively.

Processes and systems are disclosed for converting animal manure into useful energy and materials. Some variations provide a process for converting animal manure into a purified thermal gas, comprising: drying a starting animal manure in a manure dryer; pelletizing the dried animal manure to generate manure pellets; thermally reacting the manure pellets in a thermal reactor to generate an intermediate thermal gas and a solid biochar; separating out the solid biochar; condensing the intermediate thermal gas to generate a cooled thermal gas; compressing the cooled thermal gas to generate a compressed thermal gas; catalytically reacting the compressed thermal gas in a water-gas shift reactor to generate a shifted thermal gas having an adjusted H2 / CO ratio; treating the shifted thermal gas using an acid-gas removal unit to generate a purified thermal gas; removing water and / or light gases from the purified thermal gas; and recovering or further processing the purified thermal gas.

The invention discloses a reaction device for producing hydrogen through coal supercritical water gasification. The reaction device comprises an inner-layer vertical tank body, an outer-layer vertical tank body, a jacket layer of the inner-layer vertical tank body, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe is arranged at the lower part of the slag collecting chamber and extends out of the outer-layer vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the pipe wall; the inlet diffuser is mounted at a bottom sealing head of the inner-layer vertical tank body and directly faces the outlet end of the supercritical water inlet pipe, a gas outlet extending out of the outer-layer vertical tank body is formed in a top sealing head of the inner-layer vertical tank body, and the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity can be realized.

The present disclosure provides a method and apparatus for producing hydrogen. The method includes: (a) contacting a plastic with a catalyst and a gas feed; and (b) applying microwaves at a first temperature. The apparatus includes a reactor for mixing the plastic with the catalyst to form a mixture; an inlet for introducing the gas feed; a microwave generator; an optional temperature sensor; and an outlet configured to vent product hydrogen formed in the reactor.

The invention discloses a device for producing fuel gas from biomass materials, and relates to the technical field of production of fuel gas from biomass materials. The heat trap catalysis box comprises a plurality of laminated plates which are stacked together in a staggered mode, the surfaces of the laminated plates are coated with catalysts, and holes are formed in the laminated plates. According to the invention, the concentric pretreatment gasification bed, the annular secondary air curtain, the heat trap catalysis box, the pulsating jet heat integrator and the liquid seal deslagging structure are integrated and synergistically designed; a plurality of key technological processes such as pretreatment, pyrolysis, gasification, catalytic reforming, heat recovery and continuous deslagging of biomass raw materials are efficiently and smoothly joined and completed in a single reactor, so that the fuel gas yield and quality are remarkably improved, and the energy consumption and complexity of the system are effectively reduced; and efficient, compact and stable operation of the biomass gas production device is realized.

The invention discloses a biomass raw material deep processing system which comprises a water-cooled chain grate, a sealed blanking device, a water-cooled spiral feeder and a gasification furnace body, the sealed blanking device conveys biomass raw materials to the water-cooled spiral feeder, the water-cooled spiral feeder distributes the biomass raw materials on the upper surface of the water-cooled chain grate, and the gasification furnace body is arranged on the upper surface of the water-cooled chain grate. The water-cooled chain grate is used for conveying biomass raw materials, and the gasification furnace body is used for heating and combusting the biomass raw materials to generate biomass gas; the tail end of the water-cooled chain grate stoker is provided with a scraper, a water-cooled crusher, a drum-type slag cooler, a sealed belt conveyor, a collecting hopper, a U-shaped spiral feeder, a pulverizer, a cyclone collector and a rotary vibration sieve, and carbon residues generated after biomass raw materials are combusted and gasified are sequentially processed into carbon powder through the devices. According to the biomass raw material deep processing system, carbon residues are processed into valuable carbon powder, automatic biomass gas and carbon powder co-production is achieved, and the purposes of saving energy, reducing emission and improving environmental protection benefits and economic benefits are achieved.

A waste conversion apparatus and a method of implementing the apparatus are provided. The apparatus includes a control system, and a feedstock analysis system or output analysis system. A plasma forming device within a reactor of the waste conversion apparatus is controlled by the control system to apply a plasma arc to a supply of waste feedstock supplied to the system. Integrated feedback control is provided to the plasma forming device based on an analysis by the feedback analysis system to characterize of the supply of waste feedstock, and / or an analysis by the output analysis system to characterize a gas product from the reactor.

The application discloses a returning material unit, and a double-fluidized bed reaction device applying the unit. The returning material unit is arranged between a combustion chamber and a gasification chamber in the double-fluidized bed reaction device and is used in a hydrogen production process of biomass raw materials. The returning material unit comprises a returning material chamber which is communicated with the gasification chamber or the combustion chamber through a feeding pipe. A first air distribution cavity is arranged at the lower part of the returning material chamber. A loosening chamber is arranged to receive bed material particles from the combustion chamber or the gasification chamber and to block gas. The middle and upper parts of the loosening chamber are separated from the returning material chamber through a partition plate. The bottom plate of the loosening chamber is arranged to be inclined towards the partition plate. A second air distribution cavity is arranged at the lower part of the loosening chamber. The returning material unit can reduce the possibility of gas channeling between hydrogen-rich synthesis gas and flue gas and reduce the fluidized dead zone while ensuring the hydrogen production rate. The structure design of the gasification chamber of the double-fluidized bed reaction device can make the solid particles realize local core-annular flow circulation, and the heat transfer between the bed material particles and the biomass particles is enhanced.

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 invention relates to a catalytic method for increasing the content of synthesis gas in biomass carbon dioxide gasification products. The method comprises the following steps: independently dissolving transition metal salt, alkali metal salt or alkaline earth metal salt in water, or jointly dissolving the transition metal salt and at least one of the alkali metal salt or the alkaline earth metal salt in water to form a metal salt solution; biomass powder is added into the metal salt solution for first stirring, a mixed solution obtained after first stirring is subjected to first dipping, first standing and first drying, and a metal-doped autocatalytic biomass raw material is obtained; aluminum oxide powder is added into the metal salt solution for second stirring, the mixed solution subjected to second stirring is subjected to second dipping, second standing, second drying and roasting, and the metal-loaded aluminum oxide catalyst is obtained; and by taking carbon dioxide as a gasifying agent, enabling the autocatalytic biomass raw material and the metal-loaded aluminum oxide catalyst to exist at the same time under the condition of 700-1000 DEG C, and carrying out gasification reaction to obtain a product of which the integral number of synthetic gas is greater than 85%.

The invention discloses a coated SiC-coated ZnFe-MMO microwave catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation and plastic chemical recovery. The catalyst takes silicon carbide particles as an inner core, and the surface is coated with a zinc-iron composite metal oxide catalyst layer. The preparation method comprises the following steps: coating silicon carbide particles with ZnFe-gel through a sol-gel method to prepare a precursor, and roasting to obtain the ZnFe-based silicon carbide composite material. The catalyst can realize rapid conversion of polyolefin plastic in a CO2 atmosphere, synergistically fix CO2, eliminate carbon deposition and generate synthesis gas with high selectivity. Compared with the prior art, the method has the advantages of high reaction rate, high product selectivity, low energy consumption and the like, the catalyst synthesis method is simple, the wave-absorbing performance is excellent, the stability is good, a new way is provided for plastic green recovery and CO2 resource utilization, and the wide practical application value is shown.

A dual-mode process and system to produce sustainable syngas and downstream products thereof are provided.

The invention belongs to the technical field of chemical looping gasification devices, and particularly relates to a chemical looping gasification device and a gasification reaction method. The device comprises a combustion furnace and a gasification reactor, a first fuel feeding device and an oxygen carrier feeding device are arranged on the combustion furnace, the bottom of the combustion furnace is connected with an air system through a pipeline, the top of the combustion furnace is connected with a first cyclone separator through a pipeline, and the top of the first cyclone separator is connected with a flue gas treatment device through a pipeline. An oxidation state oxygen carrier pipeline is connected between the bottom of the first cyclone separator and the gasification reactor; a second fuel feeding device is arranged on the gasification reactor, the bottom of the gasification reactor is connected with a steam system through a pipeline, the top of the gasification reactor is connected with a second cyclone separator through a pipeline, and the top of the second cyclone separator is connected with a gasification synthesis gas treatment device through a pipeline; a coke pipeline is connected between the bottom of the second cyclone separator and the gasification reactor; and a reduction state oxygen carrier pipeline is connected between the lower part of the gasification reactor and the combustion furnace. The invention provides a chemical chain gasification device and a gasification reaction method suitable for fuels such as biomass and lignite.