Coal bed gas desorption device for simulating low-ground-temperature abnormal reservoir conditions

Abstract

The invention discloses a coal bed gas desorption device for simulating low ground temperature abnormal reservoir conditions, which comprises an assembly base, a treatment bin, a placement seat, a gas collection shell, a placement assembly, a simulation control mechanism and a conveying assembly, and is characterized in that the outer walls of a plurality of guide columns are fixedly connected with the other ends of corresponding driving arms respectively; the bottoms of the guide columns are rotationally connected to the bottom of the inner side of the treatment bin, the multiple bearing plates are fixedly connected to the tops of the corresponding guide columns, the multiple containing shells are fixedly connected to the tops of the corresponding bearing plates, and the simulation control mechanism is installed on the top of the inner side of the treatment bin and connected with the containing shells. And a conveying assembly is arranged between the gas collection shell and the simulation control mechanism. Therefore, in the experiment process, coal bed gas generated through desorption passes through the conveying assembly, the coal bed gas is collected in the gas collecting shell, and therefore the device can achieve rapid switching and low-temperature simulation of a plurality of samples in the same experiment, and the experiment efficiency and the data obtaining accuracy are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of coalbed methane desorption, and in particular to a coalbed methane desorption device for simulating low geothermal abnormal reservoir conditions. Background Art

[0002] In coalbed methane mining and reservoir research, simulating low geothermal abnormal reservoir conditions is of great significance for understanding the desorption behavior and reservoir characteristics of coalbed methane. At present, existing coalbed methane desorption devices are generally used to simulate low geothermal abnormal reservoir conditions, and the design concept of most devices focuses on the desorption process of a single sample. Usually, these devices simulate the desorption process of coalbed methane by setting a low temperature environment. The operating steps include placing the coal sample in the desorption chamber, adjusting the temperature to a preset value, and collecting desorption data. However, these devices have certain limitations in actual use;

[0003] First, most of the existing desorption devices can only simulate a single sample, that is, each experiment can only test the desorption of one coal sample under a certain low temperature condition. If the same coal seam sample needs to be simulated at different low temperatures, researchers must conduct experiments separately under different temperature conditions and repeat the same operation. This not only increases the complexity of the operation, but also leads to a significant reduction in experimental efficiency. Secondly, since each experiment requires readjusting the temperature, placing the sample and waiting for a stable state to be reached, the experimental cycle of a single device is relatively long. In order to obtain comprehensive desorption data, researchers need to conduct the same test multiple times, which consumes a lot of time and human resources. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to propose a coalbed methane desorption device that simulates low geothermal abnormal reservoir conditions. By setting up multiple sample storage devices, multiple coalbed samples can be stored in the same device at the same time, avoiding the tedious operation of re-placing the samples for each experiment. When the same coalbed sample needs to be tested under different low-temperature environments, the simulated sample can be quickly replaced by switching the sample position, which greatly improves the efficiency of the experiment. This method significantly shortens the experimental cycle, reduces the time consumption of repeated operations, and improves the degree of experimental automation and throughput. Ultimately, it helps to more efficiently obtain desorption data under multiple temperature conditions and accelerate the progress of coalbed methane research.

[0006] To achieve the above-mentioned purpose, the present invention proposes a coalbed methane desorption device that simulates low geothermal abnormal reservoir conditions, comprising an assembly base, a processing chamber, a placement seat, a gas collecting shell, a placement component, a simulation control mechanism and a conveying component, wherein the processing chamber and the placement seat are respectively installed on both sides of the top of the assembly base, the gas collecting shell is installed on the top of the placement seat, and the placement component comprises a first driving device, a driving arm, a guide column, a supporting plate and a placement shell, wherein the first driving device is installed at the inner bottom of the processing chamber, one end of a plurality of the driving arms is fixedly connected to the output end of the first driving device in a circular array, the outer walls of the plurality of guide columns are respectively fixedly connected to the other end of the corresponding driving arm, and the bottom of the guide column is rotatably connected to the inner bottom of the processing chamber, a plurality of the supporting plates are fixedly connected to the top of the corresponding guide columns, and a plurality of the placement shells are fixedly connected to the top of the corresponding supporting plates, the simulation control mechanism is installed at the inner top of the processing chamber and connected to the placement shell, and the conveying component is arranged between the gas collecting shell and the simulation control mechanism and connected through the conveying component.

[0007] The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions of the present invention, during operation, the first driving device drives the multiple driving arms to rotate, so that the multiple placement shells can be sequentially moved to different positions. A coalbed sample is placed on each placement shell. When it is necessary to simulate the desorption of coal samples under different low temperature conditions, the operator can quickly send different coalbed samples into the processing chamber for experiments by switching samples. At the same time, the simulation control mechanism controls the temperature in the separate placement shells, and simulates the desorption process of coalbed methane by accurately adjusting the low temperature environment. During the experiment, the coalbed methane generated by desorption is collected in the gas collection shell through the conveying component. Therefore, the device can realize the rapid switching and low temperature simulation of multiple samples in the same experiment, which significantly improves the experimental efficiency and the accuracy of data acquisition.

[0008] In addition, the coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to the present invention may also have the following additional technical features:

[0009] Specifically, the analog control mechanism includes a mounting seat, a second driving device, a connecting arm, a reinforcement sleeve, a sealing sleeve and a temperature control component, wherein the mounting seat is fixedly connected to the eccentric inner top of the processing chamber, the second driving device is installed at the bottom of the mounting seat, one end of the connecting arm is fixedly connected to the output end of the second driving device, the outer wall of the reinforcement sleeve is fixedly connected to the other end of the connecting arm, the sealing sleeve is fixedly connected to the inner wall of the reinforcement sleeve, and the temperature control component is installed on the top of the processing chamber and connected to the sealing sleeve.

[0010] Specifically, the temperature control component includes a refrigerator, a heater and a connecting pipe, wherein the refrigerator and the heater are both installed on the top of the processing chamber, and the connecting pipe is provided between the refrigerator and the heater and the outer wall of the sealing sleeve, and they are connected through the connecting pipe.

[0011] Specifically, the conveying assembly includes a connector, a solenoid valve, a connecting hose and a connecting pipe, wherein one end of the connector is threadedly connected to the top of the gas collecting shell, the solenoid valve is installed on the connector, one end of the connecting pipe is fixedly connected to the top of the sealing sleeve, and the other end of the connecting pipe passes through the inner bottom of the processing chamber, and the connecting hose is arranged between the other end of the connector and the other end of the connecting pipe, and they are connected through the connecting hose.

[0012] Specifically, a temperature sensor is installed on the inner wall of the placement shell, a sealing strip is sleeved on the outer wall of the placement shell, and the diameter of the outer wall of the placement shell is the same as the diameter of the inner wall of the sealing sleeve.

[0013] Specifically, a controller is installed on the top of the assembly base, the refrigerator, the heater, the temperature sensor and the solenoid valve are all electrically connected to the controller, and the controller is electrically connected to an external power supply.

[0014] Specifically, one end of a support sleeve is fixedly connected to the center of the inner top of the processing chamber, the other end of the support sleeve is slidably sleeved with one end of a support rod, the other end of the support rod is fixedly connected to a limiting sleeve, and the limiting sleeve is fixedly sleeved on the outer wall of the connecting arm.

[0015] Specifically, a guide groove is provided at the inner bottom of the processing chamber, and the bottom of the guide column is slidably engaged in the guide groove.

[0016] Specifically, a positioning sleeve is symmetrically fixedly connected to the top of the processing chamber, and the positioning sleeve is fixedly sleeved on the connecting pipe.

[0017] Specifically, the communicating pipe is a soft pipe.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1A schematic diagram of a coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure inside a processing chamber according to an embodiment of the present invention;

[0022] Figure 3 A schematic structural diagram of a sealing sleeve plate according to an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a placement component according to an embodiment of the present invention;

[0024] Figure 5 For one embodiment of the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0025] Figure 6 For an embodiment of the present invention Figure 1 Schematic diagram of the enlarged structure at point B.

[0026] As shown in the figure:

[0027] 1. Assembly base; 11. Controller; 2. Processing chamber; 21. Support sleeve; 22. Support rod; 23. Limit sleeve; 3. Placement seat; 4. Gas collecting shell;

[0028] 5. Placement assembly; 51. First drive device; 52. Drive arm; 53. Guide column; 54. Support plate; 55. Placement housing; 551. Temperature sensor; 552. Sealing strip;

[0029] 6. Analog control mechanism; 61. Mounting seat; 62. Second driving device; 63. Connecting arm; 64. Reinforcement sleeve; 65. Sealing sleeve; 66. Temperature control assembly; 661. Refrigeration machine; 662. Heating machine; 663. Connecting pipe;

[0030] 7. Conveying assembly; 71. Connecting head; 72. Solenoid valve; 73. Connecting hose; 74. Connecting pipe. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0032] The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0033] like Figure 1-Figure 6 As shown, the coalbed methane desorption device for simulating low geothermal abnormal reservoir conditions according to an embodiment of the present invention may include an assembly base 1, a processing chamber 2, a placement seat 3, a gas collecting shell 4, a placement component 5, a simulation control mechanism 6 and a conveying component 7.

[0034] The processing chamber 2 and the placement seat 3 are respectively installed on two sides of the top of the assembly base 1 , and the gas collecting shell 4 is installed on the top of the placement seat 3 .

[0035] It should be noted that the outer wall of the processing chamber 2 described in this embodiment is equipped with an opening and closing door, and sealing strips are installed at the inner wall corners of the opening and closing door. A placement groove is opened on the top of the placement seat 3, and the gas collecting shell 4 is clamped in the placement groove. A limiter is installed on the inner wall of the placement groove.

[0036] The placement assembly 5 includes a first driving device 51 , a driving arm 52 , a guide column 53 , a supporting plate 54 and a placement shell 55 .

[0037] Among them, the first driving device 51 is installed at the inner bottom of the processing chamber 2, one end of a plurality of driving arms 52 is fixedly connected to the output end of the first driving device 51 in a circular array, the outer walls of a plurality of guide columns 53 are respectively fixedly connected to the other end of the corresponding driving arm 52, and the bottom of the guide column 53 is rotatably connected to the inner bottom of the processing chamber 2.

[0038] Furthermore, if Figure 2 As shown, a guide groove is provided at the inner bottom of the processing chamber 2, and the bottom of the guide column 53 is slidably engaged in the guide groove.

[0039] It should be noted that the first driving device 51 described in this embodiment is a driving motor, and the angles between one ends of the plurality of driving arms 52 are the same.

[0040] A plurality of supporting plates 54 are fixedly connected to the tops of corresponding guide pillars 53 , and a plurality of placement shells 55 are fixedly connected to the tops of corresponding supporting plates 54 .

[0041] It should be noted that the diameter of the supporting plate 54 described in this embodiment is larger than the diameter of the placement shell 55 .

[0042] The simulation control mechanism 6 is installed on the inner top of the processing chamber 2 and is connected to the placement shell 55. A conveying component 7 is provided between the gas collecting shell 4 and the simulation control mechanism 6, and they are connected through the conveying component 7.

[0043] Specifically, in order to enable efficient simulation of multiple samples of the same coal seam, the first driving device 51 is installed on the inner bottom of the processing chamber 2, one end of the multiple driving arms 52 is fixedly connected to the output end of the first driving device 51 in a circular array, the outer walls of the multiple guide columns 53 are respectively fixedly connected to the other end of the corresponding driving arm 52, and the bottom of the guide column 53 is rotatably connected to the inner bottom of the processing chamber 2, multiple supporting plates 54 are fixedly connected to the top of the corresponding guide column 53, and multiple placement shells 55 are fixedly connected to the top of the corresponding support plate 54. The simulation control mechanism 6 is installed on the inner top of the processing chamber 2 and is connected to the placement shell 55. A conveying assembly 7 is provided between the gas collecting shell 4 and the simulation control mechanism 6, and is connected through the conveying assembly 7. Then, during the working process, the first driving device 51 drives the multiple driving arms 52 to rotate, so that the multiple placement shells 55 can be moved to different positions sequentially. A coal seam sample is placed on each placement shell 55. When it is necessary to perform desorption simulation on the coal samples under different low-temperature conditions, the operator can switch the samples to quickly send different coal seam samples into the processing chamber 2 for experiments. At the same time, the simulation control mechanism 6 controls the temperature inside the individual placement shells 55, and simulates the desorption process of coal seam gas by precisely adjusting the low-temperature environment. During the experiment, the coal seam gas generated by desorption is collected in the gas collection shell 4 through the conveying assembly 7. Therefore, the device can realize rapid switching and low-temperature simulation of multiple samples in the same experiment, which significantly improves the experimental efficiency and the accuracy of data acquisition.

[0044] In one embodiment of the present invention, Figure 1-Figure 6 As shown, the analog control mechanism 6 includes a mounting seat 61, a second driving device 62, a connecting arm 63, a reinforcement sleeve 64, a sealing sleeve 65 and a temperature control component 66, wherein the mounting seat 61 is fixedly connected to the eccentric position of the inner top of the processing chamber 2, the second driving device 62 is installed at the bottom of the mounting seat 61, one end of the connecting arm 63 is fixedly connected to the output end of the second driving device 62, the outer wall of the reinforcement sleeve 64 is fixedly connected to the other end of the connecting arm 63, the sealing sleeve 65 is fixedly connected to the inner wall of the reinforcement sleeve 64, and the temperature control component 66 is installed on the top of the processing chamber 2 and connected to the sealing sleeve 65.

[0045] It should be noted that the second driving device 62 described in this embodiment is a cylinder. By starting the second driving device 62, the sealing sleeve 65 can be sleeved on a separate placement shell 55 under the action of the connecting arm 63 and the reinforcement sleeve 64, and then the temperature inside the placement shell 55 can be controlled by the temperature control component 66.

[0046] It should be understood that an exhaust hole is provided on the outer wall of the housing 55 .

[0047] Specifically, first, the second driving device 62 is a cylinder, and the connecting arm 63 is driven to move by starting the cylinder, thereby driving the movement of the reinforcement sleeve 64 and the sealing sleeve 65. The operation of the cylinder enables the sealing sleeve 65 to be accurately sleeved on the top of the placement shell 55, thereby forming a sealed space. This sealing operation ensures that all gases can be effectively collected during the coalbed methane desorption process and prevents external air from interfering with the experimental results. After the sealing operation is completed, the temperature control component 66 starts to work, and simulates the environmental conditions of the low geothermal abnormal reservoir by accurately adjusting the temperature in the placement shell 55. The temperature control component 66 can be adjusted to different low-temperature environments according to experimental requirements, so that the coal seam sample can be desorbed at a specific temperature. In this process, the coal sample in the placement shell 55 will desorb coalbed methane under the set low-temperature conditions, and the outer wall of the placement shell 55 is provided with an exhaust hole for releasing the gas generated during the desorption process to ensure that the gas can be discharged smoothly without affecting the experimental environment. By accurately controlling the temperature and the flow of gas, the experimental device can efficiently simulate the desorption process of coalbed methane under different low-temperature conditions.

[0048] In one embodiment of the present invention, Figure 1-Figure 6 As shown, the temperature control component 66 includes a refrigerator 661, a heater 662 and a connecting pipe 663, wherein the refrigerator 661 and the heater 662 are both installed on the top of the processing chamber 2, and connecting pipes 663 are provided between the refrigerator 661 and the heater 662 and the outer wall of the sealing sleeve 65, and are connected through the connecting pipes 663.

[0049] Furthermore, if Figure 1 As shown, a positioning sleeve is symmetrically fixedly connected to the top of the processing chamber 2, and the positioning sleeve is fixedly sleeved on the connecting pipe 663.

[0050] It should be noted that the inner wall of the sealing sleeve 65 described in this embodiment is provided with an exhaust port.

[0051] Specifically, first, the temperature control component 66 is composed of a refrigerator 661 and a heater 662, which are respectively located at the top of the processing chamber 2 and connected to the outer wall of the sealing sleeve 65 through a connecting pipe 663. The refrigerator 661 is used to reduce the temperature in the placement shell 55, and the heater 662 is used to heat the ambient temperature in the placement shell 55. In this way, different low-temperature or high-temperature reservoir environments can be simulated according to experimental needs. In specific operations, the refrigerator 661 and the heater 662 are connected to the sealing sleeve 65 through a connecting pipe 663, so as to transmit the temperature regulation effect to the inside of the placement shell 55. When the temperature needs to be lowered, the refrigerator 661 starts to work, and the temperature is adjusted by the connecting pipe 663. Channel 663 guides the low-temperature gas to the placement shell 55, thereby reducing the temperature of the coal sample. On the contrary, if the temperature needs to be increased, the heater 662 supplies heat to the placement shell 55 through the same pipeline to simulate high-temperature reservoir conditions. At the same time, the positioning sleeve on the top of the processing chamber 2 fixes the connecting pipeline 663 to ensure that the connection between the pipeline and the temperature control system is stable and reliable. This design helps to accurately position the pipeline and prevent air leakage or unstable temperature control during the temperature adjustment process. A valve body is installed on the top of the outer wall of the sealing sleeve 65, and a pressure sensor is installed on the inner wall of the sealing sleeve 65. The pressure in the sealing sleeve 65 can be adjusted to further make the simulation more accurate.

[0052] In one embodiment of the present invention, Figure 1-Figure 6 As shown, the conveying assembly 7 includes a connector 71, a solenoid valve 72, a connecting hose 73 and a connecting pipe 74, wherein one end of the connector 71 is threadedly connected to the top of the gas collecting shell 4, the solenoid valve 72 is installed on the connector 71, one end of the connecting pipe 74 is fixedly connected to the top of the sealing sleeve 65, and the other end of the connecting pipe 74 passes through the inner bottom of the processing chamber 2, and a connecting hose 73 is arranged between the other end of the connector 71 and the other end of the connecting pipe 74, and they are connected through the connecting hose 73.

[0053] Furthermore, if Figure 1 As shown, a temperature sensor 551 is installed on the inner wall of the housing 55, a sealing strip 552 is sleeved on the outer wall of the housing 55, the outer wall diameter of the housing 55 is the same as the inner wall diameter of the sealing sleeve 65, a controller 11 is installed on the top of the assembly base 1, the refrigerator 661, the heater 662, the temperature sensor 551 and the solenoid valve 72 are all electrically connected to the controller 11, and the controller 11 is electrically connected to an external power supply.

[0054] Specifically, first, the connector 71 of the conveying assembly 7 is threadedly connected to the top of the gas collecting shell 4 to form an inlet for coalbed methane collection. When the coalbed methane is desorbed from the coal sample under low temperature conditions, the gas first enters the gas collecting shell 4, and then the switch of the gas flow is controlled by the solenoid valve 72. During the whole process, the temperature control and airflow management of the system are intelligently adjusted by the controller 11. The controller 11 is connected to multiple key components such as the refrigerator 661, the heater 662, the temperature sensor 551 and the solenoid valve 72, and is electrically connected to an external power supply to ensure that each component can work synchronously according to the set requirements. The refrigerator 661 and the heater 662 are controlled by The device 11 is adjusted according to the temperature requirements to keep the ambient temperature in the shell 55 within the precise range under the simulated reservoir conditions. The solenoid valve 72 is controlled by the controller 11. When it is necessary to collect coalbed methane, the solenoid valve 72 is opened. When gas flow is not required, the solenoid valve 72 is closed to prevent gas leakage. The temperature sensor 551 monitors the temperature changes in the shell 55 in real time and feeds the data back to the controller 11 to ensure that the system remains within the set temperature range. The controller 11 not only accurately controls the working status of each component through electrical connection, but also adjusts the temperature, airflow and other parameters according to experimental requirements to ensure the stability and efficiency of the coalbed methane desorption process.

[0055] It should be understood that one end of a support sleeve 21 is fixedly connected to the center of the inner top of the processing chamber 2, the other end of the support sleeve 21 is slidably sleeved with one end of a support rod 22, the other end of the support rod 22 is fixedly connected to a limiting sleeve 23, the limiting sleeve 23 is fixedly sleeved on the outer wall of the connecting arm 63, and the connecting pipe 74 is a soft pipe.

[0056] In summary, in the coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions of the embodiment of the present invention, during operation, the first driving device 51 drives the multiple driving arms 52 to rotate, so that the multiple placement shells 55 can be moved to different positions in sequence. A coalbed sample is placed on each placement shell 55. When it is necessary to simulate the desorption of coal samples under different low temperature conditions, the operator can quickly send different coalbed samples into the processing chamber 2 for experiment by switching samples. At the same time, the simulation control mechanism 6 controls the temperature in the separate placement shell 55, and simulates the desorption process of coalbed methane by accurately adjusting the low temperature environment. During the experiment, the coalbed methane generated by desorption is collected in the gas collection shell 4 through the conveying component 7. Therefore, the device can realize the rapid switching and low temperature simulation of multiple samples in the same experiment, which significantly improves the experimental efficiency and the accuracy of data acquisition.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A coalbed methane desorption device simulating low geothermal abnormal reservoir conditions, characterized in that: It comprises an assembly base (1), a processing chamber (2), a placement seat (3), a gas collecting shell (4), a placement component (5), a simulation control mechanism (6) and a conveying component (7), wherein: The processing chamber (2) and the placement seat (3) are respectively installed on both sides of the top of the assembly base (1), and the gas collecting shell (4) is installed on the top of the placement seat (3); The placement assembly (5) comprises a first driving device (51), a driving arm (52), a guide column (53), a supporting plate (54) and a placement shell (55), wherein: The first driving device (51) is installed at the inner bottom of the processing chamber (2), one end of a plurality of driving arms (52) is fixedly connected to the output end of the first driving device (51) in a circumferential array, the outer walls of the plurality of guide columns (53) are respectively fixedly connected to the other end of the corresponding driving arm (52), and the bottom of the guide column (53) is rotatably connected to the inner bottom of the processing chamber (2); A plurality of the supporting plates (54) are fixedly connected to the tops of the corresponding guide pillars (53), and a plurality of the placement shells (55) are fixedly connected to the tops of the corresponding supporting plates (54); The simulation control mechanism (6) is installed on the inner top of the processing chamber (2) and is connected to the placement shell (55); The conveying component (7) is arranged between the gas collecting housing (4) and the simulation control mechanism (6), and the two are connected via the conveying component (7).

2. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 1, characterized in that: The analog control mechanism (6) comprises a mounting seat (61), a second driving device (62), a connecting arm (63), a reinforcement sleeve (64), a sealing sleeve (65) and a temperature control component (66), wherein: The mounting seat (61) is fixedly connected to an eccentric position of the inner top of the processing chamber (2); the second driving device (62) is installed at the bottom of the mounting seat (61); and one end of the connecting arm (63) is fixedly connected to an output end of the second driving device (62); The outer wall of the reinforcing sleeve (64) is fixedly connected to the other end of the connecting arm (63), and the sealing sleeve (65) is fixedly connected to the inner wall of the reinforcing sleeve (64); The temperature control component (66) is installed on the top of the processing chamber (2) and is connected to the sealing sleeve (65).

3. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 2, characterized in that: The temperature control assembly (66) includes a refrigerator (661), a heater (662) and a connecting pipe (663), wherein: The refrigerator (661) and the heater (662) are both installed on the top of the processing chamber (2); The connecting pipe (663) is provided between the refrigerator (661) and the heater (662) and the outer wall of the sealing sleeve (65), and the refrigerator (661) and the heater (662) are connected to each other via the connecting pipe (663).

4. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 2, characterized in that: The delivery assembly (7) comprises a connector (71), a solenoid valve (72), a connecting hose (73) and a connecting pipe (74), wherein: One end of the connector (71) is threadedly connected to the top of the gas collecting housing (4), and the solenoid valve (72) is mounted on the connector (71); One end of the communicating pipe (74) is fixedly connected to the top of the sealing sleeve (65), and the other end of the communicating pipe (74) passes through the inner bottom of the processing chamber (2). The connecting hose (73) is arranged between the other end of the connecting head (71) and the other end of the communicating pipe (74), and they are connected via the connecting hose (73).

5. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 2, characterized in that: A temperature sensor (551) is installed on the inner wall of the placement shell (55), a sealing strip (552) is sleeved on the outer wall of the placement shell (55), and the diameter of the outer wall of the placement shell (55) is the same as the diameter of the inner wall of the sealing sleeve (65).

6. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claims 1-5, characterized in that: A controller (11) is installed on the top of the assembly base (1); the refrigerator (661), the heater (662), the temperature sensor (551) and the solenoid valve (72) are all electrically connected to the controller (11); and the controller (11) is electrically connected to an external power supply.

7. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 2, characterized in that: One end of a support sleeve (21) is fixedly connected to the center of the inner top of the processing chamber (2), and the other end of the support sleeve (21) is slidably sleeved with one end of a support rod (22), and the other end of the support rod (22) is fixedly connected to a limiting sleeve plate (23), and the limiting sleeve plate (23) is fixedly sleeved on the outer wall of the connecting arm (63).

8. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 1, characterized in that: A guide groove is provided at the inner bottom of the processing chamber (2), and the bottom of the guide column (53) is slidably engaged in the guide groove.

9. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 3, characterized in that: A positioning sleeve is symmetrically fixedly connected to the top of the processing chamber (2), and the positioning sleeve is fixedly sleeved on the connecting pipe (663).

10. The coalbed methane desorption device for simulating abnormal low geothermal reservoir conditions according to claim 4, characterized in that: The communicating pipe (74) is a soft pipe.

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