CN115126468B - Underground gasification experimental method and device for simulating high-temperature high-pressure coal in deep coal bed - Google Patents
Underground gasification experimental method and device for simulating high-temperature high-pressure coal in deep coal bed Download PDFInfo
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- CN115126468B CN115126468B CN202210409169.7A CN202210409169A CN115126468B CN 115126468 B CN115126468 B CN 115126468B CN 202210409169 A CN202210409169 A CN 202210409169A CN 115126468 B CN115126468 B CN 115126468B
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- 239000003245 coal Substances 0.000 title claims abstract description 79
- 238000002309 gasification Methods 0.000 title claims abstract description 71
- 238000002474 experimental method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000009970 fire resistant effect Effects 0.000 claims abstract 4
- 229910052580 B4C Inorganic materials 0.000 claims description 4
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920002312 polyamide-imide Polymers 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- -1 polybutylene Polymers 0.000 claims description 3
- 229920001748 polybutylene Polymers 0.000 claims description 3
- 239000002210 silicon-based material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000004962 Polyamide-imide Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000004088 simulation Methods 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229940103067 oxygen 60 % Drugs 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a method and a device for simulating underground gasification experiment of high-temperature high-pressure coal in a deep coal bed. The device comprises a furnace body and a base, wherein an ignition device is arranged in the furnace body, the furnace body is fixed on the base and is a hollow cuboid which is horizontally placed, one end of the furnace body is closed, the other end of the furnace body is provided with a sealing cabin cover, the closed end of the furnace body is provided with a gas production channel, the furnace body is sequentially provided with an outer frame, a pressure bearing layer, a pressurizing bag and a fire-resistant layer from outside to inside, the furnace body is provided with a plurality of gas injection channels, the gasification agent is conveyed into the furnace body by penetrating through the furnace body, the pressurizing bag is provided with three pairs, three independent pressurizing devices are respectively communicated with the three pairs of pressurizing bags, and a cuboid coal sample is placed inside the fire-resistant layer. By adjusting the water pressure of the pressurizing bag. The coal seam to be gasified can keep stable confining pressure all the time in the whole experimental process, can simulate the change condition of the coal seam under the underground gasification state of deep coal, realizes the underground coal gasification physical simulation experiment under the temperature-pressure coupling, and reduces the influence of temperature-pressure factors on underground coal gasification under the condition of a real stratum.
Description
Technical Field
The invention relates to the technical field of underground coal gasification simulation experiments, in particular to an underground coal gasification simulation experiment device and method.
Background
Underground coal gasification is an important method and direction for utilizing and developing coal resources, and the coal is ignited under the condition of underground in-situ, so that the coal is subjected to oxidation-reduction reaction, a large amount of combustible gas is generated and transported to the ground surface for utilization, and the method is an efficient development means, and particularly for coal resources which are buried deeply and coal seams which are complex in structure and difficult to mine. Therefore, many scholars have made a great deal of research on various problems related to the underground coal gasification process, wherein a very effective and intuitive method for the ground physical simulation experiment of underground coal gasification can explore various phenomena and causes in the underground coal gasification process.
The existing common physical simulation experiment method and device for underground coal gasification are mostly used for simulating the influence of different processes on underground coal gasification products, for example, the patent applied by the team, CN111852434A is an experimental device and method for underground coal gasification under any angle. However, due to the special geological background of high temperature and high pressure, the high temperature and high pressure also have great influence on the simulation result of underground coal gasification, and the traditional simulation device only considers the control function of temperature or only maintains the gasification pressure by using a steel plate pressurizing mode, which is far different from the actual situation, and is difficult to restore the actual underground situation. Therefore, the invention designs a method and a device for simulating underground gasification of high-temperature high-pressure coal in a deep coal bed, which are used for overcoming the defects.
Disclosure of Invention
The invention aims to overcome the defects and develops a method and a device for simulating underground gasification of high-temperature and high-pressure coal in a deep coal bed.
The technical scheme adopted by the invention is as follows: the utility model provides a simulation deep coal seam high temperature high pressure coal underground gasification experimental apparatus, the device includes furnace body, base, there is ignition in the furnace body, the furnace body is fixed on the base, for the cavity cuboid that the level was placed, the one end of furnace body is sealed, and the other end has sealed hatch cover, and the furnace body blind end has the gas production passageway, the furnace body is outer frame, confined layer, pressurized bag, flame retardant coating from outside to inside in proper order, there are a plurality of gas injection passageways on the furnace body, pierces through the gasification agent is carried to the furnace body in the pressurized bag has three pairs, be respectively a pair of pressurized bag of horizontal main direction in the furnace body both sides, a pair of pressurized bag around the horizontal secondary direction furnace body to and a pair of pressurized bag of vertical main direction, three independent pressure device communicate three pairs of pressurized bags respectively, the cuboid sample is placed to the flame retardant coating inside.
Preferably, the gas injection channel is externally fixed on the gasifying agent pipeline frame.
Preferably, a temperature thermocouple is arranged on the furnace body to test the temperature in the furnace.
Preferably, a sample tray is arranged in the furnace body,
preferably, the sample placing tray is a flat plate and made of refractory silicon material, and a pulley is arranged at the bottom.
Preferably, the gas injection channels are uniformly arranged at the top of the furnace body in the length direction.
Preferably, the pressurizing bag and the fireproof layer are made of high-temperature-resistant high-elasticity polymer materials.
Preferably, the high-temperature-resistant high-elasticity polymer material is selected from a polyamide-imide film, a boron carbide film and a polybutylene adipate-co-terephthalate film.
The invention also provides an experimental method for simulating underground gasification of high-temperature and high-pressure coal in a deep coal seam, which uses the experimental device and comprises the following steps:
(1) Preparing a sample, cutting coal to be gasified into a plurality of cubes, horizontally drilling a central hole from the center to form a central channel, and communicating with the central channel from the upper part to a half position to form a gasification channel;
(2) Horizontally placing a plurality of samples along the length direction of the furnace body, tightly attaching the samples to align the gasification channels, and closing the hatch cover;
(3) The adjusting and pressurizing device is respectively a horizontal main direction pressurizing device, a horizontal secondary direction pressurizing device and a vertical main direction pressurizing device, and is used for adjusting the pressure of the pressurizing bag to a set pressure value and keeping constant;
(4) Introducing gasifying agent from the gas injection channel, igniting, controlling the gas inlet position and rate through the gas injection channel, and simulating the gasification process;
(5) The pressurizing bag is set with maximum deformation, the pressurizing device does not supply pressure to the pressurizing bag after the maximum deformation is exceeded, the pressurizing bag is not extruded in the direction of the coal seam, the maximum inward deformation in the horizontal secondary direction and the vertical main direction is 20cm, and the maximum inward deformation in the horizontal main direction is 30cm, so that the state of forming a cavity in the later stage of coal seam gasification is simulated;
(6) And discharging the gas with high heat value from the gas producing channel in the gasification process.
Preferably, the pressurized bag is filled with a gas or a liquid.
Compared with the prior art, the invention has the beneficial effects that:
the constant pressure of each point in each direction in the whole experimental process can be realized through the pressurizing water bags in three directions, compared with the prior art that the whole plane pressurizing mode is performed by utilizing the steel plate, the constant pressure of each point can be realized through water in the pressurizing water bags along with the change of the coal sample, and the ground stress actual condition in the actual underground coal gasification process is simulated;
by the design of the high-elasticity film bag, the rapid response of the pressure change of each point of the coal sample can be realized, and the pressure response lag condition after the cavity appears after the coal is combusted is avoided;
compared with stacking of small samples in the prior art, the design experiment of the large coal seam sample has no contact error of the sample contact surface, so that gas void interference errors caused by people are eliminated;
the frame-shaped peripheral thermocouple arrangement method with uniformly distributed periphery can obtain temperature change conditions in all directions in the coal gasification process under the condition of not disturbing raw coal.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial schematic view of the present invention;
FIG. 3 is a block diagram of a coal sample;
wherein 1 is a base, 2 is a pressurizing device in a horizontal main direction, 3 is a pressurizing device in a horizontal secondary direction, 4 is a bearing seat, 5 is an outer frame, 6 is a pressure bearing layer, 7 is a pressurizing bag, 8 is a refractory layer, 9 is a gasified coal sample, 10 is a gas producing channel, 11 is a thermocouple, 12 is a data line of the thermocouple, 13 is a gas injection channel, 14 is a gasifying agent pipeline frame, 15 is a sealing cabin cover, 16 is a sample placing tray, 17 is a pressurizing bag in the horizontal secondary direction, 18 is a pressurizing device in a vertical main direction, 19 is a pressurizing air bag in the vertical main direction, 20 is a gasified sample,
alpha is the horizontal main direction of the device, beta is the horizontal secondary direction of the device, and gamma is the vertical main direction of the device.
Detailed Description
The technical scheme of the invention is further explained below with reference to the attached drawings.
An experimental method and a device for simulating underground gasification of high-temperature and high-pressure coal in a deep coal bed:
the method utilizes a physical simulation device for coal gasification of the hydraulic ram pressurized bag. The constant high-pressure load in the underground coal gasification process is realized by using the pressurizing bag arranged on the inner wall of the gasification chamber, and the pressure at each point on the outer surface of the sample in the whole gasification process is consistent due to the fact that the high-elasticity film is used as the pressurizing bag material, so that the physical simulation experiment of underground coal gasification under the condition of high-temperature high-pressure coupling is realized, and a theoretical basis is provided for the actual production of underground coal gasification.
And tightly placing the coal bed sample to be gasified in the gasification device, sealing the whole device, and connecting a gas pipeline. And setting triaxial pressure of the sample by combining experimental requirements and actual geological conditions, pressurizing three directions of the sample by adjusting a pressurizing device, pressurizing three main directions of the coal sample, and simulating high temperature and high pressure under the actual stratum condition.
The pressurized water bag is made of high-molecular high-temperature-resistant high-elasticity material, and the high-molecular high-temperature-resistant high-elasticity material can be made of polyamide-imide (PAI) film or boron carbide film, because the cracks of coal are developed, the strength is low, and if the sample is longer, the sample is not easy to obtain and difficult to manufacture successfully, so that the design of the pressurized water bag is cube stacked. Throughout the experiment, combustion required a movement in the long axis direction, starting from the ignition, and gradually moving in the alpha direction, the beta and gamma directions may be the same, but the alpha direction must be longer than the other two directions. The experimental setup can be put down 8 blocks if it is full, but can be put down a few if the sample is insufficient.
The horizontal main direction pressurizing device 2, the horizontal secondary direction pressurizing device 3 and the vertical main direction pressurizing device 18 are independently controlled in order to simulate the actual situation.
The gasifying agent is mainly combustion-supporting gas or mixed gas, and common methods are as follows: combustion-supporting gas such as air, pure oxygen, air+steam, oxygen 60% +nitrogen 40%
The refractory layer may be made of a nonflammable, high mechanical strength film, such as polyamide-imide (PAI) or boron carbide, or polybutylene adipate-co-terephthalate (PBAT).
The control of the pressure bearing layer of the gasifier is that when the experiment starts, a pressurized water bag is arranged between the sample and the pressure bearing layer to provide pressure, the middle part of the sample burns and disappears along with the experiment, the pressurized water bag expands towards the direction of the sample due to the constant pressure of the pressurized water bag, the pressurized water bag becomes large, when the deformation amount of the pressurized water bag in the direction is larger than a set value, liquid is not added into the pressurized water bag any more, pressure relief is started, and the direction is considered to be in a free state without constraint and pressure.
The device structure is as follows: as shown in fig. 1 and 2: the pressure-bearing base 1 of the whole device is used for ensuring that the whole device is in a horizontal state; the horizontal main direction alpha pressurizer 2 provides a constant pressure constraint for the horizontal main direction of the whole device; a horizontal sub-direction gamma pressurizing device 3 for providing constant pressure constraint for the horizontal sub-direction of the whole device; the bearing seat 4 of the whole gasification furnace body is used for supporting the stability of the whole gasification furnace body; the pressure bearing layer 6 of the gasifier is arranged in the outer frame 5 of the gasifier, so that sufficient mechanical strength is provided to ensure that the gasifier can be pressurized; the pressurizing bag 7 of the gasification furnace is used for providing stratum pressure in the gasification simulation process in real time, the refractory layer 8 of the gasification furnace is used for ensuring that flames and slag in the gasification process cannot damage the pressurizing bag 7 of the gasification furnace, and gasification coal samples 9 are gasified and then gasified to produce gas from the gas production channel 10; the temperature thermocouple 11 is used for monitoring the temperature of the gasification furnace in the underground coal gasification simulation process in real time; a data line 12 of the temperature thermocouple 11 for feeding back gasification temperature data to the outside; the gas injection channel 13 is used for simulating gasification processes of different gas injection points and continuous gas injection points; a gasifying agent pipe frame 14 for supporting layout of gasifying agent pipes; the sealed cabin cover 15 of the whole device is closed after the simulated gasification sample 20 is processed and placed in the gasification furnace, and the gasification furnace is sealed; the sample placing tray 16 for the test sample was 3.2m long as a whole. A flat plate type device with the width of 1m and the thickness of about 5cm is made of refractory silicon materials, and a pulley is arranged at the bottom of a sample placing tray so as to facilitate the sample to be placed and then moved into an gasification furnace. A pressurizing bag 17 in the horizontal direction for providing a constant pressure in the horizontal direction; a vertical main direction pressurizing means 18; a pressurized bladder 19 in a vertical main direction β.
The simulation comprises the following specific steps:
1: first, a sample was prepared, coal to be gasified was cut into a cube shape in which the sample was prepared first by 1m, and a gasification port was formed from a center hole, and an intake passage was formed from an upper hole to half. Sample preparation is shown in fig. 3.
2: the treated samples were placed on a sample tray 16, and 8 cubic samples were placed in parallel and closely arranged. The hatch 15 sealing the sample experiment furnace body is closed.
3: the three main directions of the adjusting device, namely the horizontal main direction pressurizing device 2, the horizontal secondary direction pressurizing device 3 and the vertical main direction pressurizing device 18, are that the water pressure in the pressurizing water bags in the three directions of the pressurizing bags 7, 17 and 19 is adjusted to a set pressure value by the pressurizing pumps in the three main directions, and the pressure values in the three directions are constant in the whole experimental process so as to simulate the ground stress development condition in the actual stratum.
4: gasifying agents are introduced from the air inlet pipeline 13, and in the whole experimental process, air inlets at the upper part of the furnace body are sequentially opened to control the gasification process of air inlet and the position and the speed of a gasified oxidation zone, so that different air inlet modes such as a backward gasification process, different stage air injection points and the like are simulated.
5: as the gasification process proceeds, a large amount of high heating value gas is discharged along with the produced gas pipeline 10 and enters the subsequent gas treatment device: desulfurizing, deslagging, cooling and the like.
The main body of the device comprises a furnace body and a base. Wherein, the furnace body is a cuboid-shaped device which is horizontally arranged.
The material of the pressurized water bag is a high-molecular high-temperature-resistant high-elasticity material, has very good elasticity, can quickly respond to the change condition of the pressure difference of the pressurized water bag, is deformed, can be repeatedly stretched for many times, and is not easy to fatigue.
The fireproof layer is made of a nonflammable film with high mechanical strength, is not easy to tear, crack and the like, and has very good elastic performance and quick response to pressure change.
The pressurizing bags in the three directions are symmetrically distributed, the horizontal main direction is symmetrically two, the horizontal secondary direction is symmetrically two, the vertical main direction is symmetrically two, and the pressures in the two pressurizing bags in one direction are in a communicated state in the whole process.
The maximum deformation of the pressurizing bag is limited, the pressurizing device can not supply pressure to the pressurizing bag any more when the pressurizing bag is formed by the default coal layer exceeding the limit, the pressurizing device can not be pressed any more when the pressurizing bag is used for pressurizing, the maximum deformation is 20cm when the maximum deformation is in the horizontal secondary direction and the vertical main direction, and the average deformation amount in the directions exceeds 20cm, so that the sample can not be pressed any more. The maximum deformation in the horizontal main direction was 30cm, and an average deformation in this direction exceeding 30cm considered that the sample was no longer pressed, the coal layer formed a cavity, and the pressurizing device was no longer continuously pressurizing.
Sample preparation: the collected sample was cut into a 1m×1m×1m cubic sample, and a through hole having a diameter of 10mm was drilled in the sample in the laminar direction, as shown in fig. 3.
The above embodiments are intended to be illustrative of the invention, and the scope of the invention is defined by the claims.
Claims (8)
1. The method is characterized in that the method uses a device, the device comprises a furnace body and a base, an ignition device is arranged in the furnace body, the furnace body is fixed on the base and is a hollow cuboid which is horizontally arranged, one end of the furnace body is closed, the other end of the furnace body is provided with a sealed cabin cover, the closed end of the furnace body is provided with a gas production channel, the furnace body is sequentially provided with an outer frame, a pressure bearing layer, a flexible pressurizing bag and a fire-resistant layer from outside to inside, the furnace body is provided with a plurality of gas injection channels, the gasification agent is conveyed into the furnace body through the furnace body, the flexible pressurizing bags are provided with three pairs, namely a pair of pressurizing bags which are respectively arranged at two sides of the furnace body in a horizontal main direction, a pair of flexible pressurizing bags which are respectively arranged at the front and back of the furnace body in a horizontal main direction, the three independent pressurizing devices are respectively communicated with the three pairs of flexible pressurizing bags, and the cuboid coal sample is arranged inside the fire-resistant layer; the pressurizing bag and the fireproof layer are made of high-temperature-resistant high-elasticity polymer materials;
the experimental method comprises the following steps:
(1) Preparing a sample, cutting coal to be gasified into a plurality of cubes, horizontally drilling a central hole from the center to form a central channel, and communicating with the central channel from the upper part to a half position to form a gasification channel;
(2) Horizontally placing a plurality of samples along the length direction of the furnace body, tightly attaching the samples to align the gasification channels, and closing the hatch cover;
(3) The adjusting and pressurizing device is respectively a horizontal main direction pressurizing device, a horizontal secondary direction pressurizing device and a vertical main direction pressurizing device, and is used for adjusting the pressure of the pressurizing bag to a set pressure value and keeping constant;
(4) Introducing gasifying agent from the gas injection channel, igniting, controlling the gas inlet position and rate through the gas injection channel, and simulating the gasification process;
(5) The pressurizing bag is set with maximum deformation, the pressurizing device does not supply pressure to the pressurizing bag after the maximum deformation is exceeded, the pressurizing bag is not extruded in the direction of the coal seam, the maximum inward deformation in the horizontal secondary direction and the vertical main direction is 20cm, and the maximum inward deformation in the horizontal main direction is 30cm, so that the state of forming a cavity in the later stage of coal seam gasification is simulated;
(6) And discharging the gas with high heat value from the gas producing channel in the gasification process.
2. The experimental method for simulating underground gasification of high-temperature and high-pressure coal in deep coal seam according to claim 1, wherein the pressurized bag is filled with gas or liquid.
3. The experimental method for simulating underground gasification of high-temperature and high-pressure coal in deep coal seam according to claim 1, wherein the gas injection channel is externally fixed on a gasifying agent pipeline frame.
4. The experimental method for simulating underground gasification of high-temperature and high-pressure coal in deep coal seam according to claim 1, wherein a temperature thermocouple is installed on the furnace body to test the temperature in the furnace.
5. The experimental method for simulating underground gasification of high-temperature and high-pressure coal in deep coal seam according to claim 1, wherein a sample tray is arranged in the furnace body.
6. The experimental method for simulating high-temperature and high-pressure underground coal gasification in deep coal seam according to claim 5, wherein the sample tray is a flat plate made of refractory silicon material, and a pulley is arranged at the bottom.
7. The experimental method for simulating underground gasification of high-temperature and high-pressure coal in a deep coal seam according to claim 1, wherein the gas injection channels are uniformly arranged at the top of the furnace body in the length direction.
8. The method for simulating underground gasification of coal under high temperature and high pressure in deep coal seam according to claim 1, wherein the high temperature and high elasticity resistant polymer material is selected from polyamide-imide film, boron carbide film and polybutylene adipate-co-terephthalate film.
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| CN111594099A (en) * | 2020-05-30 | 2020-08-28 | 河南理工大学 | Device and method for simulating and testing productivity of coal bed gas staged fracturing horizontal well |
| CN111852434A (en) * | 2020-07-31 | 2020-10-30 | 中国矿业大学 | Physical simulation experiment device and method for underground coal gasification at any angle |
| CN112647923A (en) * | 2020-12-24 | 2021-04-13 | 山东科技大学 | Simulation test device and method for large-scale coal underground gasification similar material |
| CN114000872A (en) * | 2021-10-29 | 2022-02-01 | 中国矿业大学 | Natural gas hydrate horizontal well stratified mining process soil layer deformation testing device |
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