108results about "Fixed-bed gasification" patented technology

A fully modularized mid-feed pyrolysis reactor includes modularized upper, middle, and lower vessels. The middle vessel is equipped with at least two feeding units. Discharge pipes of the feeding units are placed into the core feeding and reaction zone of the reactor. The discharge outlets of the discharge pipes are equipped with heat-insulating valves that can automatically close under gravity. The lower vessel integrates an integrated grate, which can be rotatably arranged inside the lower vessel. The top of the integrated grate is equipped with a rotatable distributor including a support tray and a material distribution tower with a pointed top structure positioned at the center of the support tray. The bracket formed by water-cooling pipes on the distributor can act as an agitator. Under the premise of achieving precise control, this invention solves the technical problems of single feedstock and small reactor capacity in existing bottom-feed vertical pyrolysis reactors.

A fully modularized, bottom-feed type pyrolysis reactor includes a reactor vessel, a feeding unit, an integrated grate, and an ash / char discharge unit. The reactor vessel includes detachable upper and lower vessels. The integrated grate is rotatable and integrated to an air inlet unit, feeding unit, and discharge unit. A water-cooled cooling and stirring pipe is mounted on a top face of the integrated grate, and an ash / char discharge unit is located at the bottom of the integrated grate. Ash / char is discharged through discharge gate unit, addressing the problems of inconvenient transportation, installation of the pyrolysis reactor, and imprecise temperature control. Manufactured in a modular fashion, the electrical and monitoring systems are pre-assembled and comprehensively tested before transportation to the site, reducing installation time by 90% while ensuring installation quality and allowing for various orientation configurations to meet customers' on-site requirements without altering the overall design of the reactor.

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.

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.

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 low-temperature biomass gasifier and a dry charcoal and fuel gas coupling burning boiler technology, and belongs to the technical field of biomass gasifiers, the low-temperature biomass gasifier comprises a top plate, an upper barrel, a middle barrel, a lower barrel and a discharging barrel, the top plate, the upper barrel, the middle barrel, the lower barrel and the discharging barrel are sequentially arranged from top to bottom, every two of the five gasification furnace bodies are connected through assembly, the outer portion of the gasification furnace body is supported through a supporting unit, and a discharging unit connected through an auxiliary transition barrel is arranged at the bottom of the gasification furnace body and used for discharging. The auxiliary transition barrel has the beneficial effects that the auxiliary transition barrel is clamped with the outer part of the discharging barrel of the gasification furnace main body, so that a stable transition channel is provided for carbon residues, the carbon residues falling from the discharging barrel can smoothly enter an auger conveyor, the carbon residues are prevented from being accumulated, blocked or splashed outwards at a discharging opening, and the service life of the discharging opening is prolonged. By means of the design, the overall structure of the equipment is more compact and reasonable.

The present invention relates to a multistage process and to a system for producing synthesis gas from carbonaceous solids and slurries. The process comprises the pyrolysing of the carbonaceous solids and slurries with exclusion of air to form a solid carbon carrier carbonizate and a pyrolysis gas; the oxidizing of the separated pyrolysis gas with incoming oxygen, and the contacting of the carbon carrier carbonizate with the oxidized pyrolysis gas.

A rotary grate pyrolysis gasification furnace comprises a furnace body and a plurality of furnace body supporting frames for supporting the peripheral side walls of the furnace body, a smoke outlet is formed in one side of the furnace body, a feeding port is formed in the top of the furnace body, a grate supporting disc is fixedly supported in the furnace body supporting frames below the furnace body, and a rotary grate is rotatably supported on the grate supporting disc. The upper end and the lower end of the rotary fire grate are in rotary sealing connection with the fire grate supporting disc and the lower end of the furnace body through sealing structures correspondingly, the rotary fire grate is driven by a driving device to rotate, a vertical air inlet pipe is arranged in the center in the fire grate supporting disc, and the air inlet end of the air inlet pipe extends out of the fire grate supporting disc. Compared with a traditional fixed bed gasification furnace, the pyrolysis gasification furnace has the advantages that the pyrolysis efficiency is improved by more than 20%, meanwhile, the carbon content of residues is reduced to below 5%, resource waste is reduced, and the energy utilization rate is improved.

Processes are disclosed that utilize beneficial reactions downstream of carbonaceous feed (e.g., biomass) oxidative conversion technologies, and advantageously under conditions (e.g., high temperatures) and / or with the syngas effluent quality (e.g., having particulates and / or other impurities) characteristic of raw syngas exiting such technologies (e.g., prior to, or upstream of, certain syngas purification operations). Such conversion technologies utilize an oxygen-containing feed or, more broadly, an oxidant-containing feed. The beneficial reactions may be carried out by the introduction of hydrogen for performing the reverse water-gas shift (RWGS) reaction and / or by the introduction of one or more hydrocarbons (e.g., methane, ethane, and / or propane) for performing the dry reforming reaction. These and other reactions can advantageously adjust the composition of the syngas obtained (e.g., as the raw syngas from an oxidative conversion technology) in a manner benefitting its subsequent use in providing value-added products such as liquid hydrocarbons.

The invention relates to the technical field of gasification furnaces, in particular to a UGI gasification furnace control method. Comprising the following steps: S1, slag discharge resistance adjustment: referring to flow-proof plate parameters of fixed bed gasifiers in the same industry; s2, air blowing strategy matching: determining initial air blowing intensity based on the increased total slag discharge resistance in the step S1 according to raw material coal characteristics of the target gasification furnace, and matching corresponding circulation time and in-furnace steam pressure based on the initial air blowing intensity to form an initial air blowing process parameter group; s3, working condition evaluation and collaborative optimization are carried out, economic indexes of operation of the gasification furnace are obtained, and a staged progressive optimization strategy is adopted based on the economic indexes. Through working condition evaluation and collaborative optimization, a staged progressive optimization strategy is adopted to dynamically adjust geometric parameters and blowing strength of the flow prevention structure, and the comprehensive targets of stable furnace conditions, gas production rate improvement and energy consumption reduction can be achieved at the same time. The method is mainly applied to UGI gasifier control.

Processes are disclosed for the gasification of carbonaceous feeds and preferably biomass, which can implement one or more strategies for removing contaminants, particularly chlorides and ammonia, with reduced negative impacts on overall processing objectives. These objectives can include obtaining a syngas product, with sufficient purity and hydrogen content or H2:CO molar ratio, that favor downstream conversion and / or separation operations as needed to generate value-added products (e.g., hydrocarbons, alcohols such as methanol, RNG, or renewable, purified hydrogen). According to certain aspects, heat and / or material integration of (i) contaminant removal with (ii) other operations of the gasification process can lead to further efficiencies. Metallurgical requirements over conventional processes may be reduced.

A method, system, and apparatus for decomposing a biomass feedstock include providing a layer of inert particulate matter, such as sand, to line and insulate the bottom surface of a main chamber of a reactor where pyrolysis and oxidation are conducted to produce char and producer gases as primary products. In an embodiment, feedstock positioned in a side region of the reaction chamber insulates side walls of the main chamber from heat in the center region of the main chamber. In an embodiment of the method, a rate of removal of solid products such as char from the reactor is controlled in response to a temperature detected at a position of an extraction tube inlet of the reactor. Activated charcoal may be obtained as a primary product using the system and method, by feeding oxygen into the reactor at an inlet positioned adjacent to an inlet to the extraction chamber.

To provide a pyrolysis type treatment system capable of recovering high-quality oil from a processing object containing oxygen atoms, such as biomass.SOLUTION: A pyrolysis type treatment system comprises: a fluidized bed furnace 40 having a pyrolysis furnace 1 that generates pyrolysis gas by pyrolyzing a processing object, and a medium regeneration furnace 44 that combusts residue of the pyrolyzed processing object; a condensation apparatus 7 that condenses oil components and moisture in the pyrolysis gas to separately recover an oil-water mixture and light gas; a gas separation apparatus 15 that recovers reducing gas from the light gas; a reducing gas transfer line 17 that transfers the reducing gas recovered by the gas separation apparatus 15 to the pyrolysis furnace; and a fuel line 21 that transfers the light gas from which the reducing gas has been separated to the medium regeneration furnace 44.SELECTED DRAWING: Figure 1

The invention is used to thermochemically produce syngas using a fixed-bed shaft reactor (1) that is operated in a co-current mode and has a reaction chamber through which carbon-containing synthetic substances (2) and / or solid biomass particles (3) flow from top to bottom. By continuously adding an oxygen-containing gas (7) in an autothermal gassing process, a raw syngas is produced in the shaft reactor (1) as the gas flows through a fuel pre-heating zone (4), a pyrolysis zone (5), and an oxidation zone (6) arranged downstream thereof, and the syngas is drawn at the lower end of the fixed-bed shaft reactor (9) together with fly ash after additionally flowing through a reduction zone (8). After exiting the reduction zone (8), the raw syngas flows through an entrained-flow zone (12) which is located below the reduction zone (8) in the reactor. In order to improve the efficiency by using the sensible excess heat of the produced syngas, the invention proposes providing an inlet for the oxygen-containing gas (7) below the reduction zone (8), and the walling of the reactor in the entrained-flow zone (12) is designed to be double-walled at least in some regions in the form of a heat exchanger with at least one heat exchanger surface (18), wherein the oxygen-containing gas is conducted through a gas pre-heating zone (17) formed in the heat exchanger such that the outflowing raw syngas is cooled, and the oxygen-containing gas is heated.

A gasification process utilizing carbonaceous feed and, preferably, biomass is disclosed, and the gasification process can implement one or more strategies for generating an aqueous ammonia product having a purity suitable for use in a number of applications, including applications within the overall process, in addition to alkalinity. An exemplary application involves neutralization of a sump and interfaced slag water system. Recovery of this aqueous ammonia product by condensation from the overhead vapor product of the first scrubbing device contact step can be carried out in combination with a scrubbing operation utilizing this scrubbing device contact step, and optionally, a scrubbing device container housing one, two or more additional scrubbing device contact steps, vertically separated by individual aqueous scrubbing device feeds introduced at varying axial heights.

The torrefaction gas treatment device 400 makes it possible to chemically recycle torrefaction gas 202 produced from solid recovered fuel (SRF) pellets 117, etc. by torrefaction, without the need to combust the torrefaction gas 202.

The invention provides a method for continuously preparing green hydrogen through polyethylene waste gasification-catalytic reforming, which comprises the following steps: a gasification process and a catalytic reforming process are included, the temperature of the gasification process is 450-650 DEG C, and the temperature of the catalytic reforming process is 750-850 DEG C. According to the method disclosed by the invention, the efficient catalyst is selected and prepared, and the adaptability to plastic wastes with different components is high; the continuous reaction can be realized.

Methods for gasifying a carbon-containing material, including: i) Reacting the carbon-containing material with steam in the presence of a catalyst containing a hydroxide, oxide or salt of an alkali metal, an alkaline earth metal or a mixture thereof, to produce a gas composition containing CO, CO2, CH4, H2O and H2, wherein the steam-to-carbon ratio is 1 to 2; ii) thermal decomposition of CH4 produced in gasification step i) into elemental carbon (C) and H2, wherein at least a part of the elemental carbon (C) produced in step ii) is recirculated into gasification step i); and iii) Converting CO2 produced in step i) into (a) CO using a process selected from reverse water-gas shift reaction and CO2 reforming reaction, wherein the product from step i) or ii) is used; and wherein 30 to 70 vol% of the total amount of H2 and CO contained in the gas product of step i) is recirculated into the gasification step i).

The present invention relates to a system for extracting hydrogen from chemical organic feedstocks, comprising: a thermal gasifier supplied with a chemical-organic feedstock, the thermal gasifier configured to heat the feedstock to a temperature of at least 800°C while conveying the feedstock through the thermal gasifier by an auger and to collect hot gases; a duct line configured to convey the hot gas to a high temperature reformer that subjects the hot gas to a temperature of 1200°C to 1400°C and releases a high temperature reformed gas; a duct line for conveying the hot reformed gas to a heating chamber of the thermal gasifier, the heating chamber including a chamber outlet for discharging the reformed gas after circulating within the heating chamber; a duct line conveying the reformed gas from the chamber outlet to a device configured to separate hydrogen from the reformed gas; and A hydrogen reservoir for the hydrogen produced by the device.

The utility model relates to the field of gasification furnaces, and discloses a dry-type deslagging biomass gasification furnace which comprises a gasification furnace main body, a dismounting assembly is mounted on the lower side of the gasification furnace main body, a vibration assembly is mounted at the bottom of the gasification furnace main body, and the dismounting assembly comprises a side door and a frame. The exterior of the side door is rotatably connected to the exterior of the gasification furnace main body, the exterior of the frame is fixedly connected to the exterior of the gasification furnace main body, an insertion rod is slidably connected to the interior of the frame, an insertion hole is formed in the middle of the insertion rod, a sliding plate is fixedly connected to the right side of the insertion rod, and a first spring is fixedly connected to the right side of the sliding plate; and the top of the frame is slidably connected with a stop lever. According to the side door opening device, the inserting rod is pulled to drive the sliding plate to compress the spring I, so that the inserting rod is separated from the side door, and meanwhile, the stop lever automatically falls down and is inserted into the inserting hole, so that the side door can be quickly opened, tailings in the gasification furnace main body can be conveniently cleaned, and the operation is convenient and labor-saving.

A horizontal gasifier features a closed body (3) with thermal insulation containing a helical feed screw (4) for the feedstock (2), a vertical feed inlet (1) for the feedstock (2) located at one end of the body (3), an inlet (7) for the oxidizing gas (6), and an ash collector (5) at the other end of the body (3), and an outlet (9) for volatile products (8). The gasifier is characterized by a gasification zone (21) in the final section of the body (3), with the shaft (4b) of the helical feeder (4) being completely hollow along its length and equipped with inlet openings (18) for introducing a supplementary portion of oxidizing gas (6) located in a segment extending beyond the body (3) on the side where the feed inlet (1) is located, and outlet openings (20) for this portion of oxidizing gas located in the gasification zone (21).

The present application relates to the technical fields of gasification furnace, and disclose a reciprocating grate gasification furnace, including furnace body, the furnace body is internally provided with gasification cavity, the bottom of the furnace body is provided with air inlet hole in both ends, the both ends of the gasification cavity inner wall is provided with rotation hole and reciprocating groove, the rotation hole is movably sleeved with center roller I, the reciprocating groove is movably sleeved with center roller II.The present application is through the process of shaking of the relative reciprocating motion of grate I and grate II, the transmission rod in sliding cavity can be extruded to move up and compress spring I, make transmission rod through the stretching pull impact column, and make spring II compression energy storage, when the grate I and grate II are separated in the process of shaking, spring I can push transmission rod down, make pull rope relaxation, so that spring II push impact column and hit the blocking material in the air inlet hole, so that the material is broken loose under the impact, so as to complete the cleaning of the air inlet hole.

Waste treatment plant 60 characterized by the fact that it includes: - a first reactor 1 inside which said waste 60 is reacted at a temperature above 500°C in order to obtain a first product 17, and fluidly connected to a first cavitator 4 in which said first product 17 is transformed into at least one first hydrocarbon 64, a second reactor 2 inside which at least a portion of said at least one first hydrocarbon 64 is reacted at a temperature above 500°C in order to obtain a second product 63, and fluidly connected with a second cavitator 9 in which said second product is transformed into a second hydrocarbon 66.

Gasification processes utilizing carbonaceous feeds and preferably biomass are disclosed, which can implement one or more strategies for integration of products, such as CO2-enriched products, that are generated from syngas purification, and into which CO2 and possibly other acid gases are preferentially rejected. Such products, which necessarily result as a consequence of obtaining a purified syngas product that is desirably substantially free of components other than H2 and CO, are often provided at different pressures and with corresponding, different compositions. Advantageously, these products can be effectively "matched" or "tailored" to the process and utility needs in the overall production of renewable products (e.g., liquid hydrocarbons or purified hydrogen). Important advantages relate to the discovery of economically attractive solutions for reducing potential CO emissions in CO2 that is vented to the atmosphere.

The present invention relates to a system and method for controlling the biogenic carbon content in a combined syngas stream made from a first syngas stream and a second syngas stream obtained by gasification of a first feedstock. The first feedstock has an undefined biogenic carbon content, and the second syngas stream has a defined biogenic carbon content. The biogenic carbon content of the combined syngas stream is controlled by measuring the biogenic carbon content of the syngas and then adjusting the flow of the first feedstock and / or the second syngas stream into the gasifier until a target biogenic carbon content in the syngas is reached. The systems and methods according to the present invention may further be used to produce chemical products, such as methane, methanol, and Fischer-Tropsch hydrocarbons, having a target biogenic carbon content from the combined syngas stream.

It is provided a system and process for producing a recycled cracked naphtha product slate comprising gasifying in a gasifier waste material to obtain a crude syngas, the waste material comprising carbon and hydrogen in a molar ratio H:C; cleaning the crude syngas in a cleaning unit to obtain a clean syngas comprising H2 and CO in a molar ratio H2:CO of between 0.5:1 and 5:1; and reacting the clean syngas in a reactor in the presence of a catalyst comprising a mixture of transition metal oxides to obtain the recycled cracked naphtha product slate, wherein the molar ratio H:C is less than 2.5.

The utility model discloses a biomass gasification furnace grate device, which comprises a fire grate, an ash basin, a base, a bracket, a three-way air guide pipe, a fan and a driving mechanism, the fire grate is rotatably arranged in a gasification furnace and is positioned at the bottom of the gasification furnace, a blanking gap is arranged between the fire grate and the furnace wall of the gasification furnace, a plurality of first ash knives are arranged on the inner wall of the furnace wall of the gasification furnace, and a plurality of second ash knives are arranged on the base. The plurality of first ash knives are annularly arranged along the axis of the gasification furnace in sequence; the base is arranged at the bottom of the fire grate and rotationally arranged on the support, and the driving mechanism is in transmission connection with the base and used for driving the base and the fire grate to rotate. The device has the technical effects that the air inlet amount can be accurately controlled, and corresponding gasification air amounts can be conveniently provided for different gasification raw materials, so that the yield and the quality of fuel gas and activated carbon can meet the requirements; the fire grate is in a tower shape and is matched with a second ash knife on the ash basin and a first ash knife on the inner wall of the gasification furnace, so that sufficient combustion of biomass fuel is guaranteed, and generated charcoal ash can be automatically and timely discharged.

The present invention relates to a method and apparatus for removing impurities from a gasification gas. A gasification gas (1) containing at least tar and / or undesired hydrocarbons is fed to a catalytic reformer (2) containing at least one catalyst bed, an oxygen-containing gas (4) is injected onto the surface of the catalyst bed, the gasification gas (1) is arranged to flow through the catalyst bed (3) and contact the oxygen-containing gas (4) in the catalyst bed, and a purified gas (5) is discharged from the catalytic reformer (2). The present invention also relates to the use of this method.

This invention discloses a coal-fired boiler system and process for co-firing biomass gas, belonging to the field of energy conservation and emission reduction technology for coal-fired boilers. Applied to the air inlet side of the main combustion zone of a coal-fired boiler, it includes a gasification device, a sampling device, and a flow control device. Biomass solid fuel and a gasifying agent generate biomass gas in the gasification device. The biomass gas is connected to the flow control device via a pipeline. The flow control device outputs the biomass gas to the perimeter air outlet of the main combustion zone for co-firing. The sampling device is installed on the pipeline between the gasification device and the flow control device to sample and detect the biomass gas. This invention's coal-fired boiler system for co-firing biomass gas ensures efficient utilization of biomass energy while precisely controlling and reducing NO pollutants without altering existing coal-fired boiler technology. x Emissions.

A thermal decomposition-type treatment system is provided with: a fluidized bed furnace (40) having a thermal decomposition furnace (1) for generating a thermal decomposition gas by thermally decomposing an object to be treated, and a medium regeneration furnace (44) for combusting a residue of the thermally decomposed object to be treated; a condensation device (7) that condenses an oil component and moisture in the thermally decomposed gas and recovers an oil-water mixture and a light gas, respectively; a gas separation device (15) for recovering the reducing gas from the light gas; a reducing gas transfer line (17) for transferring the reducing gas recovered by the gas separation device (15) to the thermal decomposition furnace; and a fuel line (21) for transferring the light gas from which the reducing gas has been separated to the medium regeneration furnace (44).