269results about "Coal gasification" patented technology

The invention relates to the technical field of underground gas production, and discloses a metal sealing gas production wellhead device which comprises a body. A housing; the filtering assembly is used for circularly filtering gas in the wellhead; the self-discharging assembly is used for automatically discharging impurity particles attached to the filtering assembly; the filtering assembly comprises a screening device and an indexing rotating device; and the screening device is used for filtering gas impurities in the well. According to the metal sealing gas production wellhead device, drum-type double-layer filtering can be achieved through the arranged filtering assembly, so that it can be guaranteed that impurity particles in mined gas can be greatly filtered out, and the purity of the extracted gas is guaranteed. And the indexing rotation of the circular filter cartridge can be controlled by utilizing the indexing rotation device, so that the gradually blocked circular filter cartridge can be rotated, and clean filter holes face the underground again, and therefore, circulating automatic anti-blocking screening is carried out, and the operation stability of the gas production wellhead device is ensured.

The invention relates to a deep coal underground gasification method which comprises the following steps: drilling a plurality of gasification wells in a land parcel, sequentially arranging the plurality of gasification wells into three rows from the edge of the land parcel, and fracturing a bottommost coal seam; the first row of gasification wells are injection wells, the second row of gasification wells are production wells, and the bottommost coal seam between the first row of gasification wells and the second row of gasification wells is gasified; when the gasification high-temperature area of the gasified coal seam is expanded to the front edge of the gas cooling area, the second gas gasification well is closed, the third gas gasification well serves as a production well, and the coal seam continues to be gasified; meanwhile, a fourth row of gasification wells are drilled; after the coal bed is gasified, the bottommost coal bed between the second row of gasification wells and the third row of gasification wells is gasified, and so on, the bottommost coal bed between all the rows of gasification wells is gasified; meanwhile, cement paste is injected into the first exhaust gasification well to fill the gasified goaf; and so on, filling the goaf between each row of gasification wells; sequentially gasifying and refilling each coal seam from bottom to top according to the method.

The invention relates to the technical field of underground coal gasification, in particular to a coal underground gasification process stability monitoring and evaluating method which comprises the following steps: determining a space mapping relation between a gasifier temperature field and an acoustic emission event according to the temperature gradient and the acoustic emission event of a gasifier; carrying out three-dimensional inversion on a combustion cavity of the gasification furnace, and determining attenuation trends of the coal seam under different temperature gradients; according to the attenuation trend of the coal seam under different temperature gradients, the propelling direction of the boundary of the combustion cavity is determined by utilizing the spatial distribution density and the relative position of each acoustic emission event; according to the propelling direction of the fuel cavity boundary, boundary moving paths are formed, and the propelling area proportion of each position in the propelling direction is calculated according to the distance difference of the boundary moving paths; and according to the propulsion area proportion of each position in the propulsion direction and the expansion rate of the combustion cavity, determining the space stability classification of each part of the combustion cavity. The accuracy and the efficiency of monitoring underground gasification of the coal seam are realized.

The invention relates to the technical field of coal underground gasification control, in particular to a stable control method for the gasification process of deep coal passing through dirt band. The gas pressure distribution data and the pore change characteristic data of the deep coal gasification area are collected in real time through the distributed sensor array, the gas dynamic correction permeability is generated, the gas injection pressure is adjusted and dynamically corrected according to the gas dynamic correction permeability, and the gas pressure is kept stable; screening a potential risk area through a main stress direction deviation angle and a stress concentration coefficient in the dirt band layer, analyzing a shear stress threshold value of the potential risk area based on a stress-strain coupling model, and judging a stability evaluation index of the potential risk area; and when the stability evaluation index is lower than a threshold value, a multi-stage emergency regulation and control mechanism is triggered, and a dirt band layer reinforcement intervention scheme is generated. By means of multi-source data fusion and a dynamic feedback mechanism, the limitation of a traditional method for lagging response of the instability risk of the dirt band layer is broken through, and full-closed-loop intelligent stable control over the gasification process is achieved.

The invention discloses a coal seam group occurrence three-area linkage gas extraction method. Firstly, a coal seam is divided into an underground coal gasification area, a pressure relief permeability increasing area and an original extraction area; in the initial stage of underground coal gasification, in the process that high-temperature combustible gas generated by underground coal gasification is injected into a ground drilling well, the high-temperature combustible gas and a coal body are subjected to heat transfer, so that the temperature of the coal body is increased, and gas desorption is enhanced; under the continuous coupling action of high temperature and high pressure of the high-temperature combustible gas, the permeability of the coal body is improved; in the process that high-temperature combustible gas is injected into the ground drilling well, gas extraction is continuously conducted on other adjacent drilling holes; under the condition that gas injection and gas extraction are sequentially and circularly performed in ground drilling, the coal body is circularly impacted by positive pressure-negative pressure alternating aerodynamic force, and further fracturing of the coal body is facilitated; under the triple effects of high-temperature coal body gas desorption strengthening, coal body permeability increasing and gas displacement, large-flow and high-quality extraction of deep coal seam gas is finally achieved.

The invention belongs to the technical field of coal bed gas exploitation, and particularly relates to a method for achieving multiple purposes of a coal bed gas horizontal well. Firstly, a horizontal well is constructed in a coal seam, staged fracturing is conducted to increase permeability, coal bed gas ground extraction is achieved, when the coal bed gas yield cannot reach the economic recoverable condition, coal underground gasification is conducted through the horizontal well, and finally carbon dioxide obtained after gasification separation or other output is injected for storage through underground residual coal and coal cinder gaps. Multiple purposes of the coal bed gas horizontal well are achieved; through one-well multi-stage utilization, the functions of coal bed gas extraction, coal underground gasification, carbon dioxide storage and the like are achieved step by step, and the comprehensive cost is reduced by 40% or above.

The invention discloses a coal underground gasification mining front and rear furnace common well continuous coordination propulsion method which comprises the following steps: S1, constructing a gas inlet well and a gas outlet well of a first furnace, and performing gas injection fracturing on a gasification to-be-mined area of the first furnace by using the gas outlet well; s2, coal seam combustion gasification operation is conducted on the gasification to-be-mined area of the first furnace, and synthesis gas is collected through a gas outlet well of the first furnace; meanwhile, a gas outlet well of the second furnace is used for conducting gas injection fracturing on the gasification to-be-mined area of the second furnace; s3, the combustion space area of the first furnace is made to be idle for cooling, meanwhile, the second furnace conducts combustion gasification operation, and the third furnace conducts gas injection fracturing operation; each furnace is subjected to a flow process of gas injection fracturing, combustion gasification, idle cooling and CO2 storage well closing treatment; and S4, completing each flow process in sequence. The upper furnace and the lower furnace carry out difference node follow-up according to the flow process by one flow node, the upper furnace and the lower furnace carry out well sharing, the number of drilled wells is reduced, geological damage is relieved, and the mining efficiency is improved.

The invention discloses a system and a method for supercritical CO2 in-situ pyrolysis of wide-depth-range oil-rich coal, an injection well, a first horizontal well, a second horizontal well and a production well are respectively arranged in shallow-layer oil-rich coal and deep-layer oil-rich coal, a temperature monitor is supplemented, supercritical CO2 is injected to realize in-situ pyrolysis of the oil-rich coal, and the in-situ pyrolysis of the oil-rich coal is realized. The pyrolysis products are subjected to grading treatment, meanwhile, different land parcels are operated in a combined mode, waste heat of the previous land parcel is used for the pyrolysis reaction of the next land parcel, CO2 is a heat carrying medium, and then part of CO2 is sealed in the previous land parcel. In the whole process, in-situ pyrolysis of the oil-rich coal seam in different burial depths and thickness ranges is achieved, heat in the pyrolysis process is fully utilized, heat waste is avoided, and the mining utilization rate of the oil-rich coal is increased through the promoting effect of supercritical CO2 on heat and mass transfer; and meanwhile, the strategic goals of CO2 emission reduction and carbon neutralization promotion are achieved.

Disclosed herein are methods and related systems for stimulating hydrogen gas (H2) generation from Earth's subsurface, and extraction thereof. The methods include forming at least one well in contact with a source rock formation, wherein the at least one well is configured to allow the introduction of a fluid composition into the source rock formation, then introducing the fluid composition into the source rock formation. Thereafter, hydrogen gas production is stimulated from the source rock formation through a serpentinization process, and is subsequently extracted.

The invention relates to the field of clean energy development and utilization, in particular to an underground coal gasification method with high-temperature steam as a gasifying agent and an experimental device. The method comprises the steps of exploration, well building, permeability increasing, gasification, coal gas utilization and waste treatment, the experimental device comprises a steam generator and a gasification furnace, the steam generator injects high-temperature steam into the gasification furnace, the high-temperature steam is used for coal gasification, in the gasification step, the high-temperature steam is injected into a coal seam, and the high-temperature steam is used for coal gasification. The high-temperature steam serving as a gasifying agent is subjected to a series of reactions with the coal, the high-temperature steam is gasified to generate coal gas through chemical reaction with the coal, and the high-temperature steam is also used for heating the coal to pyrolyze the coal to generate coal gas; according to the method, oxygen is not directly injected into the coal seam, the coal seam is not ignited, and combustion of coal is not involved, but high-temperature steam is injected into the coal seam, the underground coal gasification process is completed through the oxidation-reduction reaction and the distillation pyrolysis action of the high-temperature steam and the coal, and the raw gas is generated.

A method of generating hydrogen in a subsurface formation, the method comprising injecting oxidizable metal particles into a subsurface formation comprising subsurface water and a geologic trap, wherein the subsurface water has a temperature of from 18° C. to 400° C. and a pressure of from 500 psi to 10,000 psi, the geologic trap comprises one or both of a structural trap or a stratigraphic trap, the geologic trap substantially prevents vertical migration of the subsurface water out of the subsurface formation, and the oxidizable metal particles react with the subsurface water to form hydrogen, metal oxides, metal hydroxides, or combinations thereof.

The invention belongs to but not limited to the technical field of underground coal gasification, and discloses an underground coal gasification method and gas injection equipment. Constructing a directional drill hole and a gasification channel penetrating through the underground coal seam; a gas injection pipe with a plasma torch is put into the gasification channel, a gasification agent is injected, and in-situ gasification of the underground coal seam is implemented; and the generated gas is conveyed to the ground for collection through the drill hole. According to the underground coal gasification method and the gas injection equipment provided by the invention, the gasification agent is activated by the plurality of plasma torches arranged in the directional channel at the tail end of the gas injection pipe and then is directionally jetted to the coal seam, so that the gasification agent is in contact with the coal seam in a short time and is gasified, the directional conveying of the plasma gasification agent is realized, and the effective utilization rate of the plasma gasification agent is improved; meanwhile, a combustion space area of the coal seam after gasification can be expanded in a fan shape in the longitudinal direction with the gasification agent outlets of the plasma torches as the center, the expansion equivalent radius of the combustion space area is relatively large, and a large amount of coal can be gasified through one gasification channel.

The invention discloses a coal underground efficient gasification method based on calcium-based catalyst injection and a carbon dioxide geological storage method. The calcium-based powder material adopts high-purity limestone, wherein the content of calcium oxide is greater than 50%. The method comprises the following steps: crushing a limestone raw material into micron-scale to nano-scale powder, putting the powder into a stirring device, mixing the powder with a coal underground gasification injection agent to obtain a suspension fluid, and injecting the suspension fluid into a coal underground gasification furnace which is in production; calcite minerals in limestone are decomposed into calcium oxide under the coal underground gasification high-temperature effect, and the calcium oxide adsorbs water and carbon dioxide to the surface of coal coke to generate a synergistic gasification reaction at the same time. Wherein the injectant and the calcium-based powder suspension fluid are prepared by adopting a foam suspension device provided with an ultrasonic generator, so that the suspension stability of the calcium-based powder in the suspension fluid is improved. According to the invention, the calcium-based material is injected into the coal underground gasification furnace as the catalyst, so that the moisture, carbon dioxide and carbon in the coal are subjected to co-gasification reaction, the coal underground gasification reaction rate and gasification efficiency can be obviously improved, the environmental pollution is reduced, and the maximum utilization of resources is realized.

The invention discloses a hot CO2-assisted electromagnetic heating in-situ carbon storage and hydrogen production synergistic method, belongs to the technical field of oil and gas reservoir in-situ carbon storage and hydrogen production, and solves the problem that CO2 and other gases can be generated during oxygen injection combustion reservoir in-situ hydrogen production at present. The method comprises the following steps: selecting a target reservoir, digging a well and distributing hydrogen production collaborative equipment, transforming and developing the target reservoir based on the type of the target reservoir, injecting high-temperature CO2, starting a microwave emission device of an electromagnetic heating hydrogen production and hydrogen production well to continuously heat the reservoir to a hydrogen production temperature, and keeping the current reservoir temperature and pressure condition to produce hydrogen. Starting an electromagnetic heating hydrogen production and hydrogen production well for production; closing the well to stop production when the hydrogen yield is rapidly reduced; according to the invention, the production of CO2 gas in the hydrogen production process is avoided, and multiple injection processes of oxygen-containing gas, water vapor and the like are simplified at the same time; the electromagnetic heating cost is reduced by injecting high-temperature CO2 to preheat the reservoir, and meanwhile, the utilization and geological storage of CO2 can be realized, so that the synergistic effect of geological storage of CO2 and in-situ hydrogen production is ensured.

The invention discloses a coal underground gasification injection-production well pattern determination method, device and equipment and a medium. The method comprises the steps that an injection well site is determined according to a gasification control area of a target reservoir development body, and an injection well bore structure is determined according to injection conditions and coal seam parameters corresponding to the gasification control area; determining a migration path concentration area and an enrichment area of preset generated gas, and determining a production well site according to the migration path concentration area and the enrichment area of the preset generated gas; and according to the injection well site, the injection well body structure and the production well site, coal underground gasification injection-production well pattern distribution of the target reservoir development body is determined. According to the technical scheme, by selecting the proper injection well site, the injection well body structure and the production well site, coal underground gasification injection-production well pattern distribution is determined, coal underground gasification injection-production well pattern deployment is achieved, and the coal seam combustion rate and the preset generated gas recovery rate are increased.

The invention discloses a coal underground combustion gasification and carbon dioxide sequestration mining treatment method. The method comprises the steps that S1, gas injection fracturing is conducted, specifically, fracturing gas is introduced through a gas outlet well to enable a coal seam corresponding to a gasification to-be-mined area to form a fracturing seam net; s2, combustion gasification: taking the bottom end of a gas inlet shaft of the furnace to mountain gas and the bottom end as a mining direction, discharging gas from the furnace, and discharging synthesis gas; and S3, sealing and closing the well: injecting carbon dioxide serving as displacement gas into the space to be sealed through the gas inlet well, collecting mixed gas through the gas outlet well, and then injecting high-pressure CO2 gas into the space to be sealed for sealing treatment. According to gas injection fracturing of a single furnace, a horizontal fracturing gas injection channel is adopted for carrying out gas injection fracturing treatment on the gasification to-be-mined area of the furnace located above to form a fracturing crack net, the upper furnace well and the lower furnace well can be jointly subjected to difference node follow-up according to the flow process and the difference of one flow node, and the sealing difficulty of the well and a combustion space area is reduced; and the mining efficiency is improved.

The invention belongs to the technical field of strip mine residual coal resource recovery, and particularly relates to a strip mine end slope residual coal underground gasification re-mining process and system.The strip mine end slope residual coal underground gasification re-mining process comprises the following construction steps that S1, a directional drilling system is constructed at a strip mine end slope coal seam outcrop and comprises a gas injection drilling hole, an exhaust drilling hole and a drainage drilling hole, forming a gasifier type I suitable for a thick coal seam or a gasifier type II suitable for a thin-medium thick coal seam; s2, injecting a gasification agent into the gasification furnace to perform coal bed gasification to generate coal gas and capture CO2 in gasified tail gas; s3, pressurizing and liquefying the captured CO2, injecting the liquefied CO2 into a combustion space area, and performing mineralization and storage in combination with alkaline ash; wherein the gas injection drill hole and the exhaust drill hole are arranged at the bottom or the top of a coal seam according to the thickness difference of the coal seam, and part of accumulated water is reserved in the whole drainage drill hole to prevent gas leakage. Therefore, efficient recovery of residual coal and full-process low-carbon emission are realized through differential gasification furnace structural design, dynamic sealing of the drainage drill hole and collaborative filling technology of the combustion space area.

The invention discloses a coal mine gas collaborative anti-reflection extraction method, which belongs to the field of coal mine gas extraction, and comprises the following steps: S1, drilling a plurality of vertical drilling wells and a plurality of horizontal drilling wells in a coal seam area to form a three-dimensional drilling network; s2, composite electric field fracturing is conducted, specifically, transient impact is conducted through a high-voltage pulse electric field, and then low-frequency electromagnetic waves are introduced for continuous action; s3, geothermal water in the underground abandoned mine is pumped through a high-pressure pump, the geothermal water is heated to the set temperature through a heat pump and then mixed with high-pressure nitrogen, the mixture is introduced into a wellhead of the three-dimensional well drilling network in a pulse mode, and water is pumped out after the set time and returned and conveyed into the underground abandoned mine; and S4, gas is extracted from the wellhead position through negative pressure adsorption equipment. By the adoption of the coal mine gas collaborative anti-reflection extraction method, advanced technologies such as a three-dimensional well drilling network, composite electric field fracturing and pulse type geothermal water and nitrogen mixed injection are combined, and the extraction rate is greatly increased.

According to the coal in-situ fluidized mining method based on the radio frequency heating technology, after coal seam parameters are determined through geological exploration, an L-shaped heating well is arranged in the middle of a coal seam, an L-shaped production well is arranged on the top of the coal seam, and a high-permeability fracture network is constructed by adopting a liquid CO2 high-pressure fracturing technology. And then deploying a radio frequency heating device in the heating well, and promoting in-situ pyrolysis and gasification of the coal seam to generate raw gas such as CH4 and CO by accurately regulating and controlling power and frequency. According to the coal in-situ fluidization mining method, through the synergistic effect of'fracturing-supporting-radio frequency excitation ', continuous conversion of coal solid-state energy to flow-state energy and direct extraction of gas-state products by the production well are achieved, the functions of efficient mining and CO2 geological storage are achieved, environmental damage and safety risks generated by traditional mining are remarkably reduced, and the coal in-situ fluidization mining method is suitable for industrial production. And an innovative path is provided for green development of coal resources.

A heat extraction system for extracting heat from a reservoir, the system including a co-axial tool configured to be placed underground, the co-axial tool having an outer pipe and an inner pipe located within the outer pipe, each of the outer pipe and the inner pipe being connected to a shoe so that a fluid flows through an annulus defined by the inner and outer pipes, reaches the shoe, and flows through a bore of the inner pipe; and a power generator fluidly connected to a chemical processing unit to receive a fluid, and also fluidly connected with a first port to the inner pipe and with a second port to the outer pipe of the co-axial tool. A temperature difference of the fluid at the power generator and at the co-axial tool drives the power generator to generate energy.

The invention relates to the technical field of underground coal gasification, and provides an active cooling method and an active cooling device for underground coal gasification, and the method comprises the following steps: capturing carbon dioxide generated in a gasification process; the captured carbon dioxide is cooled and stored; after gasification is finished, a sealing material is injected into the production well and an annular gap generated in the gasification process, so that the gasification cavity is kept airtight; and the stored carbon dioxide is pressurized and injected into the gas injection well. A carbon dioxide gas injection active cooling mode is adopted, and it is ensured that the inner wall of a combustion space area cannot generate cracks due to drastic temperature change; moreover, carbon dioxide in the gasification process is used as a coolant, so that the collaborative operation of gasification and carbon sealing can be realized, and the target of zero emission is achieved.

The invention discloses a deep coal supercritical water advancing type gasification method, which comprises the following steps that fracturing fluid is injected from an injection well, and negative pressure is formed in a production well, so that under the guidance of the negative pressure of the production well, the fracturing fluid is fractured in a coal seam to form a communication seam network between an output section of the injection well and an input section of the production well; supercritical water is injected into the coal seam from the injection well, so that part of the coal body of the coal seam is heated; oxygen is injected into the coal seam from the injection well, part of the coal body of the coal seam and the oxygen are subjected to an oxidation reaction to be heated, then part of the coal body of the coal seam, the supercritical water and the oxygen are subjected to an oxidation-reduction reaction to form a reaction area of the coal seam, and gas is generated; gas enters the production well through the communication seam net and is extracted through the production well; and the supercritical water and the oxygen are injected alternately and repeatedly until the reaction area of the coal seam is gradually propelled from the output section of the injection well to the input section of the production well through the communication seam net. According to the invention, the gas trapping efficiency, the total produced gas quantity and the resource utilization rate of the coal seam can be improved.

The invention discloses a deep in-situ resource composite fluidization mining method. The method comprises deep in-situ resource liquefaction mining, deep in-situ resource gasification mining and deep in-situ resource reinforcement and degradation. Wherein deep in-situ resource liquefaction exploitation is realized through combination of well group hydraulic fracturing and organic solvent dissolution; in the deep in-situ resource gasification mining, the residual solid coal resources after liquefaction are gasified and combusted, and heat extraction is achieved through heat exchange; in the deep in-situ resource reinforcement and degradation process, during filling reinforcement, residual coal resources are continuously utilized through the degradation effect of microorganisms; integrated mining is formed through mutual cooperation of liquefaction, gasification and microbial degradation of deep in-situ resources, the utilization efficiency of deep in-situ resource conversion is greatly improved, the resource recovery rate is remarkably improved, underground residual chemical reagents are treated, the problem of environmental pollution is effectively relieved, and the method is suitable for industrial production. And a technical support is provided for the development of a deep in-situ resource fluidization mining theory.

A method for fracturing a subsurface rock formation for hydrogen production includes injecting a fluid comprising water into a subsurface rock formation under controlled conditions, generating fractures in the subsurface rock, and recovering hydrogen gas produced by subsurface rock after the generation of the fractures. The fluid is injected at a pressure below the breakdown pressure of the subsurface rock.

A heat extraction system for extracting heat from a reservoir, the system including a co-axial tool configured to be placed underground, the co-axial tool having an outer pipe and an inner pipe located within the outer pipe, each of the outer pipe and the inner pipe being connected to a shoe so that a fluid flows through an annulus defined by the inner and outer pipes, reaches the shoe, and flows through a bore of the inner pipe; and a power generator fluidly connected to a chemical processing unit to receive a fluid, and also fluidly connected with a first port to the inner pipe and with a second port to the outer pipe of the co-axial tool. A temperature difference of the fluid at the power generator and at the co-axial tool drives the power generator to generate energy.

An in-situ large-area drilling and furnace construction method for coal gasification and co-mining of kerosene and / or coalbed methane is provided, which includes: constructing an injection well to the target coal seam and then constructing a horizontal well to divide the target coal seam into sections of coal; extracting coalbed methane; transforming the horizontal wells on both sides of the coal in the first section of coal into coal gasification production wells, and dividing them into intake and exhaust channels; constructing ventilation boreholes to form a “honeycomb shaped” gasifier, which ignites and gasifies to promote the production of combined gases from combustion; after the combustion of first section of coal is completed, continuing to construct the next section of coal and drill holes between adjacent horizontal wells to achieve continuous coal seam combustion and gasification. The method of the present disclosure can improve combustion efficiency and increase kerosene extraction efficiency.

The invention discloses an in-situ low-pressure high-temperature coal hydrogen production method, and belongs to the technical field of coal gasification mining. According to the method, low-pressure superheated water vapor and oxygen are injected into a coal seam, heat is released through the oxidation reaction of the oxygen and coal, the coal seam is further heated to 800-1000 DEG C, and hydrogen and carbon dioxide are generated through the reaction of the oxygen and the water vapor; in-situ efficient hydrogen production is carried out in coal by combining cooperative injection of superheated water vapor and oxygen and adopting a distributed temperature and pressure monitoring and well pattern technology; according to the method, the technical bottleneck of traditional coal mining can be broken through, clean hydrogen energy can be provided while carbon dioxide emission is reduced, and a new technical path is provided for efficient and clean utilization of coal resources.

A method of generating biogas is disclosed, including delivering a feedstock downhole to a coal reservoir, generating biogas within the coal reservoir, and harvesting the biogas. The method comprises delivering a feedstock downhole to a coal reservoir via an injection well, generating biogas within the coal reservoir through microbial action, creating a biogas that is isotopically differentiable from a background gas that is native to the coal reservoir, harvesting the biogas at the injection well and one or more offset wells of the coal reservoir, analyzing the biogas and coal bed methane from the coal reservoir at the injection well and at one or more offset wells within the same coal reservoir, detecting the biogas at the offset wells using isotopic differentiation, and mapping the migration of the biogas from the injection well to the offset wells using the biogas as an isotopic tracer.

The invention relates to the technical field of coal underground gasification simulation, and discloses a controllable gas supply device for simulating a coal underground gasification experiment, which comprises a premixing tank, a neck bush is fixedly mounted in the premixing tank, a batching turntable is rotatably mounted in the neck bush, a driving motor is fixedly mounted at the top of the premixing tank, and a gas supply device is mounted at the bottom of the premixing tank. The driving motor drives the batching turntable to rotate through the transmission shaft, a plurality of storage cavities are formed in the outer circular surface of the batching turntable, movable blocks are slidably mounted in the storage cavities, and reset springs which abut against the movable blocks in the radial direction of the batching turntable are fixedly mounted in the storage cavities. According to the device, various gasification agents are mixed into a single-phase-state mixture through differential matching of the premixing tank, the mixture is directly guided into the gasification furnace to be subjected to a gasification test, the device has the advantages of being adjustable in matching and timely in response, the problems that the types and the matching of the gasification agents are inconvenient to adjust, and changes of experiment conditions cannot be timely responded are solved, and the experiment efficiency is greatly improved.