Deep in-situ coal gas scientific experiment device

Abstract

The utility model discloses a deep in-situ coal gas scientific experiment device, which comprises a coal gas experiment mechanism, the coal gas experiment mechanism comprises a test cabin, the bottom end of the inner wall of the test cabin is filled with a simulated coal seam, the upper end of the inner wall of the test cabin is filled with a simulated rock stratum, the top end of the test cabin is in threaded connection with an upper cover, and the upper cover is in threaded connection with a lower cover. Connecting openings are formed in the center of the upper cover at equal intervals in a penetrating mode, and simulated stress loading rods are arranged in the connecting openings and abut against the top end of the simulated rock stratum. By means of the added simulation stress loading rods, after different pressures are applied through the hydraulic cylinder, different stresses required by experiments can be provided, so that the scheme can be used for simultaneously researching the influence of the stress on gasification in the deep in-situ coal gasification process; and the influence of different stresses on the hydrogen content in the coal gas component under various gasification conditions is researched, the multidirectionality of the experiment and the accuracy of data are improved, the use is convenient, and the experiment requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal gas simulation experiment technical field, concretely is a kind of deep in-situ coal gas scientific experimental device. BACKGROUND

[0002] The utilization of hydrogen energy is an important development direction of clean energy. At present, there are many methods to obtain hydrogen, among which coal in-situ gasification has the characteristics of high hydrogen content, safety and environmental protection, and low hydrogen production cost. Therefore, it is of great significance to study how to further increase the hydrogen content in the produced gas in deep in-situ gasification for the realization of the large-scale application of hydrogen energy. In order to achieve the above purpose, simulation experiments are needed to explore the influence of various parameters (temperature, pressure, gasifying agent composition, etc.) on the hydrogen content during coal gasification, especially the influence of ground stress on coal gasification. The existing coal gasification simulation experiment device mainly focuses on how to realize high temperature, high pressure, transportation of various gasifying agents, and collection of gas parameters at each part during the simulation experiment. These simulation devices cannot realize the simulation research of ground stress on in-situ coal gasification, and in actual in-situ coal gasification, ground stress has important influence on the collapse of coal seam in gasification area, the distribution of "three zones" of gasification, the high and low of effective components of coal gas, and the change of gas injection point position. Therefore, it is necessary to establish a deep in-situ coal gasification simulation device with stress loading system to study the influence of ground stress in deep in-situ coal gasification process. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a kind of deep in-situ coal gas scientific experimental device to solve the problem that the existing coal gasification simulation experiment device mainly focuses on how to realize high temperature, high pressure, transportation of various gasifying agents, and collection of gas parameters at each part during the simulation experiment in the above background technology.

[0004] To solve the above technical problem, the utility model is realized by the following technical scheme:

[0005] The utility model is a kind of deep in-situ coal gas scientific experimental device, comprising:

[0006] The coal gas experiment mechanism includes a test cabin, the bottom end of the inner wall of the test cabin is filled with simulated coal seam, and the upper end of the inner wall of the test cabin is filled with simulated rock stratum, the top end of the test cabin is threadedly connected with an upper cover, and a connecting port is equidistantly provided through the central position of the upper cover, a simulated stress loading rod is arranged in the connecting port and abuts against the top end of the simulated rock stratum.

[0007] Further, the simulated rock stratum is provided with a plurality of simulated stress loading rods.

[0008] Further, equidistantly arranged on the inner wall of the connecting port is a counterport, and a ring-shaped groove is formed in the central position of the inner wall of the counterport, and a longitudinal groove is formed in the opposite sides of the upper end of the counterport and communicated with the ring-shaped groove, and a counter-convex is fixed on the opposite sides of the outer surface of the simulated stress loading rod, and the counter-convex extends into the longitudinal groove and is in damping contact with the inner wall of the ring-shaped groove.

[0009] Further, a fixing bolt is equidistantly arranged through the edge of the upper end of the upper cover and extends into the top end of the test cabin, a roller is fixed at the bottom corner of the test cabin, and sealing filler is filled at the joint between the test cabin and the upper cover.

[0010] Further, a reserved passage is formed through the lower part of the test cabin, a gasification agent inlet is threadedly arranged at one end of the reserved passage, and a coal gas outlet is threadedly arranged at the other end of the reserved passage, a pressure sensor is arranged on the inner wall of the gasification agent inlet, and a pressure gauge is connected to the pressure sensor

[0011] Further, a base is further included, a reaction force frame is fixed on one side of the base, a hydraulic cylinder is equidistantly arranged through the top end of the reaction force frame, symmetrical slide rails are fixed on one side of the upper end of the base, the inner wall of the slide rail is in rolling contact with the outer surface of the roller, a hydraulic piston is fixed between a group of the slide rails on one side of the upper end of the base, and one end of the hydraulic piston is fixed to one end of the test cabin.

[0012] Further, a counter-joint is fixed to the upper end of the simulated stress loading rod and the lower end of the hydraulic cylinder, a convex one is fixed to the opposite sides of the lower end of the inner wall of one of the counter-joints, a convex two is fixed to the opposite sides of the middle part of the inner wall of the other counter-joint, and the convex two and the convex one are arranged in contact.

[0013] The utility model has the following beneficial effects:

[0014] The utility model provides different stresses required by experiments by adding a plurality of simulated stress loading rods and applying different pressures through the hydraulic cylinder, measures the three-dimensional temperature in the test cabin by a plurality of thermocouples, monitors the pressure change at the outlet by connecting the pressure gauge and the pressure sensor to the coal gas outlet, and studies the influence of stress on gasification in the deep in-situ coal gasification process and the influence of different stresses on the hydrogen content in the coal gas component under various gasification conditions, improves the multidirectionality of experiments and the accuracy of data, is convenient to use, and meets the requirements of experiments.

[0015] Based on the above beneficial effects, different multiple simulated rock layers are provided, multiple regions and different stress loading can be realized, and multiple docking interfaces are matched in one connecting port, so that multiple simulated stress loading rods in one connecting port can be laid out at one time to provide different stress loading, which helps to improve the accuracy and necessity of the test, and the rotating resistance mode is adopted, so that the simulated stress loading rod can be docked and installed, which saves time and labor and is convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical schemes of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 is a sectional view of the present application;

[0018] Figure 2 is a test cabin experimental state diagram of the present application;

[0019] Figure 3 is a top view of the upper cover of the present application;

[0020] Figure 4 is an assembly drawing of the simulated stress loading rod of the present application;

[0021] Figure 5 is a docking diagram of the simulated stress loading rod and the hydraulic cylinder of the present application.

[0022] In the drawings, the component list represented by each reference numeral is as follows:

[0023] 1, test cabin; 2, simulated coal seam; 3, simulated rock layer; 4, upper cover; 5, connecting port; 51, docking port; 52, annular groove; 53, longitudinal groove; 54, docking protrusion; 6, simulated stress loading rod; 61, docking head; 62, protrusion one; 63, protrusion two; 7, base; 8, reaction force frame; 9, hydraulic cylinder; 10, slide rail; 11, hydraulic piston; 12, fixing bolt; 13, reserved passage; 14, gasification agent inlet; 15, coal gas outlet. DETAILED DESCRIPTION

[0024] The technical schemes in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the embodiments of the utility model will be described in further detail below with reference to the drawings.

[0026] Please refer to Figures 1-5 The utility model discloses a kind of deep in-situ coal gasification scientific experimental devices, comprising:

[0027] Coal gasification experimental mechanism, the coal gasification experimental mechanism includes test cabin 1, the bottom end of the inner wall of test cabin 1 is filled with simulated coal seam 2, and the upper end of the inner wall of test cabin 1 is filled with simulated rock stratum 3, the top of test cabin 1 is threadedly connected with upper cover 4, and the central position of upper cover 4 is equidistantly penetrated with connecting port 5, simulated stress loading rod 6 is arranged in connecting port 5, and the top of simulated rock stratum 3 is in contact with it;

[0028] Test cabin 1 provides installation environment, metal, is the reaction device of in-situ coal gasification, simulated coal seam 2 selects lump coal, briquette and the like and is arranged from bottom to top, and thermocouple and the like for temperature measurement are arranged therein during arrangement process, simulated rock stratum 3 realizes multiple regions, different stress loading, connecting port 5 is installed to simulated stress loading rod 6, and the loading of different stress is realized by cooperating hydraulic cylinder 9 of simulated stress loading rod 6 to realize the influence of different stress on gasification.

[0029] Simulated rock stratum 3 is provided with multiple, and relative to the multiple simulated stress loading rods 6 corresponding to it.

[0030] The inner wall of connecting port 5 is equidistantly arranged with docking port 51, and the central position of the inner wall of docking port 51 is provided with annular groove 52, the opposite sides of the upper end of docking port 51 are communicated with annular groove 52 and are provided with longitudinal groove 53, the opposite sides of the outer surface of simulated stress loading rod 6 are fixed with docking protrusion 54, and docking protrusion 54 extends to longitudinal groove 53 and is in damping contact with the inner wall of annular groove 52.

[0031] Longitudinal groove 53 satisfies the extension of docking protrusion 54 to annular groove 52, and docking protrusion 54 extends to the inner wall of annular groove 52 by rotating, and the contact between the two can conveniently and quickly fix simulated stress loading rod 6, so that the installation of multiple simulated stress loading rods 6 in one connecting port 5 is realized to provide different simulated stress.

[0032] The edge of the upper end of upper cover 4 is equidistantly penetrated with fixing bolt 12 and extends to the top end of test cabin 1, the bottom corner of test cabin 1 is fixed with roller, and the connecting place of test cabin 1 and upper cover 4 is filled with sealing filler;

[0033] The fixed bolt 12 meets the locking of the upper cover 4 structure, the threaded connection mode, easy to disassemble, the roller meets the rolling position movement of the test cabin 1, and the sealing filler guarantees the sealing of the upper cover 4 and the test cabin 1.

[0034] The lower part of the test cabin 1 is provided with a reserved channel 13, one end of the reserved channel 13 is provided with a gasification agent inlet 14 in a threaded manner, and the other end is provided with a coal gas outlet 15 in a threaded manner.

[0035] The gasification agent inlet 14 is used for conveying the gasification agent to the combustion zone, the coal gas outlet 15 is used for discharging the coal gas generated in the gasification process out of the test cabin 1, the reserved channel 13 is used for conveying and guiding the gasification agent, and the coal gas outlet 15 is provided with a pressure monitoring interface at the position, which is connected with a pressure gauge and a pressure sensor, and is used for monitoring the pressure change at the outlet.

[0036] The base 7 is further provided with a reaction force frame 8 fixed on one side of the base 7, a plurality of hydraulic cylinders 9 are arranged at equal intervals on the top end of the reaction force frame 8, a plurality of slide rails 10 are symmetrically fixed on one side of the upper end of the base 7, the inner wall of the slide rail 10 is in rolling contact with the outer surface of the roller, a hydraulic piston 11 is fixed on one side of the upper end of the base 7 between a group of slide rails 10, and one end of the hydraulic piston 11 is fixed with one end of the test cabin 1.

[0037] The base 7 provides an installation environment and provides a device structure stability force through contact with the ground, the reaction force frame 8 is provided with a plurality of hydraulic cylinders 9, the stress loading rod 6 is simulated through the controlled hydraulic cylinder 9, the test of the influence of different stresses on coal gasification is realized, the slide rail 10 is in rolling contact with the roller, and the test cabin 1 is pushed to the front of the reaction force frame 8 through the controlled hydraulic piston 11.

[0038] The upper end of the simulated stress loading rod 6 and the lower end of the hydraulic cylinder 9 are both fixed with a butt joint 61, the lower end of the inner wall of one of the butt joints 61 is fixed with a protrusion one 62 on the opposite sides, the middle part of the inner wall of the other butt joint 61 is fixed with a protrusion two 63 on the opposite sides, and the protrusion two 63 and the protrusion one 62 are arranged in abutment.

[0039] The abutment between the protrusion one 62 and the protrusion two 63 can connect and fix a group of butt joints 61, so as to realize the quick butt joint installation between the simulated stress loading rod 6 and the hydraulic cylinder 9.

[0040] Working principle:

[0041] 1. Place the base 7 on the horizontal ground, connect the base 7 and the reaction force frame 8;

[0042] 2. Hoist the test cabin 1 to the equipment base 7, and the roller is located on the slide rail 10;

[0043] 3, reaction force frame 8 install hydraulic cylinder 9, after connecting hydraulic cylinder 9 and test chamber 1, base 7 of hydraulic cylinder 9 in base 7, connect the pipeline of hydraulic cylinder 9 and power system;

[0044] 4, fill the simulated coal seam 2 in the test chamber 1, set the reserved channel 13, install the thermocouple at different layers, and fill the simulated rock layer 3 after filling the simulated coal seam 2;

[0045] 5, the upper cover 4 with the simulated stress loading rod 6 is placed on the upper part of the test chamber 1, and the test chamber 1 is sealed;

[0046] 6, the test chamber 1 is pushed into the reaction force frame 8 through the hydraulic piston 11 on the base 7, and each simulated stress loading rod 6 corresponds to a hydraulic cylinder 9;

[0047] 7, connect the inlet and outlet pipelines, and have the inlet and outlet gas conditions;

[0048] 8, first apply a simulated stress to the simulated coal seam 2, ignite the test chamber 1, and carry out the simulated underground gasification experiment, start the water injection pipe at different positions to start gas injection through temperature monitoring data;

[0049] 9, test the change of hydrogen in the coal gas component under different stresses and temperatures, adjust the process parameters, and obtain the optimal process control parameters;

[0050] 10, after the experiment is completed, remove the inlet and outlet gas pipelines, remove the test chamber 1 from the reaction force frame 8, open the upper cover 4, clean the internal residues, and prepare for the next test.

[0051] The scheme, with the help of the added plurality of simulated stress loading rods 6, can provide different stresses required by the experiment after applying different pressures through the hydraulic cylinder 9, so that the scheme can study the influence of stress on gasification in deep in-situ coal gasification process, and study the influence of different stresses on hydrogen content in coal gas component under various gasification conditions, improve the multidirectionality of the experiment and the accuracy of the data, facilitate use, and meet the needs of the experiment.

[0052] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation described. Obviously, according to the content of the specification, many modifications and changes can be made. The embodiments are selected and described in detail in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. A deep in-situ coal gasification scientific experiment device, characterized in that, Include: Coal gas experimental mechanism, the coal gas experimental mechanism includes test cabin (1), the bottom end of the inner wall of test cabin (1) is filled with simulated coal seam (2), and the upper end of the inner wall of test cabin (1) is filled with simulated rock stratum (3), the top of test cabin (1) is threadedly connected with upper cover (4), and the central position of upper cover (4) is equidistantly penetrated with connecting port (5), the connecting port (5) is provided with simulated stress loading rod (6) inside, and is in contact with the top of simulated rock stratum (3).

2. The scientific experimental device for deep in-situ coal gasification according to claim 1, characterized in that: The simulated rock stratum (3) is provided with a plurality of and corresponding to a plurality of simulated stress loading rod (6).

3. The scientific experimental device for deep in-situ coal gasification according to claim 1, characterized in that: The inner wall of connecting port (5) is equidistantly provided with docking port (51), and the central position of the inner wall of docking port (51) is provided with annular groove (52), the opposite sides of the upper end of the inside of docking port (51) are provided with longitudinal groove (53) communicated with annular groove (52), the opposite sides of the outer surface of simulated stress loading rod (6) are fixed with docking protrusion (54), and docking protrusion (54) extends into longitudinal groove (53) and is in damping contact with the inner wall of annular groove (52).

4. The scientific experimental device for deep in-situ coal gasification according to claim 1, characterized in that: The edge of the upper end of upper cover (4) is equidistantly penetrated with fixing bolt (12), and extends into the top end of test cabin (1), the bottom corner of test cabin (1) is fixed with roller, and the connection between test cabin (1) and upper cover (4) is filled with sealing filler.

5. The scientific experimental device for deep in-situ coal gasification according to claim 1, characterized in that: The lower part of test cabin (1) is penetrated with reserved channel (13), one end of reserved channel (13) is threadedly provided with gasification agent inlet (14), the other end is threadedly provided with coal gas outlet (15), the inner wall of gasification agent inlet (14) is provided with pressure sensor, and the pressure sensor is externally connected with pressure gauge.

6. The scientific experimental device for deep in-situ coal gasification according to claim 1, characterized in that: It also includes base (7), one side of base (7) is fixed with reaction force frame (8), and the top of reaction force frame (8) is equidistantly penetrated with hydraulic cylinder (9), one side of the upper end of base (7) is symmetrically fixed with slide rail (10), the inner wall of slide rail (10) is in rolling contact with the outer surface of roller, one side of the upper end of base (7) is fixed with hydraulic piston (11) between a group of slide rails (10), and one end of hydraulic piston (11) is fixed with one end of test cabin (1).

7. The scientific experimental device for deep in-situ coal gasification according to claim 6, characterized in that: The upper end of simulated stress loading rod (6) and the lower end of hydraulic cylinder (9) are fixed with docking head (61), the lower end of the inner wall of one docking head (61) is fixed with protrusion one (62) on the opposite sides, the middle of the inner wall of the other docking head (61) is fixed with protrusion two (63) on the opposite sides, and protrusion two (63) and protrusion one (62) are in contact.

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