KR101341444B1 - Coal bed methane residual quantity measurement system - Google Patents

Abstract

The present invention relates to a system for measuring residual coal bed methane which can exactly measures residual coal bed methane by analyzing a coal core obtained by test drilling to develop coal bed methane (CBM). In particular, the system for measuring residual coal bed methane according to the present invention can easily and accurately measure residual coal bed methane included in a coal bed at a test drilling site by easily moving the measuring system, and minimize and measure the amount of gas loss at the same time by measuring residual coal bed methane included in a coal core at a test drilling site easily and accurately by controlling a coal core crushing process according to characteristics of a coal bed at each site. As a result, accurate data can be provided which is required to determine the development and commercial availability of coal bed methane. Therefore, the reliability and competitiveness of underground resources development, especially coal bed methane development as well as related or similar fields, can be improved.

Description

Coal Bed Methane residual quantity measurement system

The present invention relates to a coal bed methane gas residual measurement system, and more specifically, to analyze the coal core to be tested for the development of coal bed methane (CBM: Coal Bed Methane) to analyze the methane gas content of the coal bed, in particular residual methane gas It is to be able to measure accurately.

In particular, the present invention to ensure the mobility to easily and accurately measure the residual amount of methane gas contained in the coal core at the test drilling site, and by controlling the crushing process of the coal core according to the characteristics of the coal bed by each site, coal bed methane The present invention relates to a coal bed methane gas residual measurement system that can quickly and accurately determine whether the gas is commercially available.

The gas produced during coal mining operations and released into the atmosphere is combustible gas, and about 95% of the coal gas is methane.

As such, methane gas released into the atmosphere during coal mining has become a huge problem in the global warming and environmental field in that it is about 21 times more powerful greenhouse gas than carbon dioxide.

Therefore, the technology of capturing and developing methane gas present in the coal seam and using it as a resource can not only minimize global warming and environmental problems but also solve the global resource depletion problem. Its importance continues to grow.

Coal Bed Methane (CBM) is produced during the transformation of plants into coal during the geological age and is present in the coal seam, attached to coal molecules or freed in voids.

Briefly looking at the development and use form of the coal seam methane gas, it is divided into a method of directly extracting and using methane gas from an undeveloped coal bed, and a method of collecting and using gas when coal coal mining.

In particular, in the case of coal beds located at a depth where coal mining is difficult, a method of directly extracting methane gas from the coal bed should be used. Since the development is determined, it is important to accurately measure the amount of coal seam methane gas before development.

The measurement of methane gas content in the coal seam is divided into indirect and direct methods.

Indirect methods can be used to measure adsorption and desorption isotherm curves in the laboratory, or related statistics, gas inferences from carbonization, density logging measurements and the relationship between coal density and gas content. It is a method of indirectly measuring the amount of gas remaining.

The direct method is to perform in-situ coal core sample by drilling in the field, and to measure the amount of gas desorbed from the coal sample and the rate of gas desorption, which is more reliable than the indirect method. high.

The methane gas content of the coal seam by the direct method includes the amount of lost gas generated during drilling and transportation of coal core samples, the amount of desorbed gas generated during desorption, and the amount of residual gas remaining in the coal core after desorption ( The total gas content is the sum of these three measurements.

Of these, the residual gas amount is measured by crushing the coal core to check the amount of methane gas remaining in the coal core. In other words, the residual gas amount is to measure the gas amount with respect to the crushed weight of the coal core.

At this time, when the crush rate of the coal core is lowered, since a considerable amount of residual gas present in the coal core is not discharged from the coal core, there is a problem that the reliability of the measured residual gas amount is very low.

Therefore, in order to ensure sufficient reliability with respect to the measured value of the residual gas amount, the coal core must be crushed to 60 mesh or less.

However, until now, methods for crushing coal cores below the required size for accurate measurement of residual gas amount have been problematic in transportation and use to the site due to inefficient time and crushing process and the bulk of the crushing device. .

In addition, even if the reference to the development and management of petroleum resources, such as the following conventional patent document does not solve this problem.

Republic of Korea Patent Publication No. 10-1047859 "Petroleum resource information management system and its information management method"

In order to solve the above problems, an object of the present invention is to provide a coal bed methane gas residual amount measuring system that can accurately measure the residual amount of methane gas in the coal bed by analyzing the coal core tested for the development of coal bed methane gas. There is this.

In particular, the present invention by controlling the crushing process of the coal core to crush the coal core to a sufficient size (less than 60 mesh) according to the characteristics of the coal seam at each site, the residual amount of methane gas contained in the coal core in the test drilling site It is an object of the present invention to provide a coal seam methane gas residual amount measurement system that can be easily and accurately measured.

In addition, by simplifying the configuration of the measuring device (canister) and the system including the same, the mobility is improved, and the crushing of the drilled coal core and the measurement of residual gas amount can be performed directly on site, thereby allowing the commercial utilization of coal bed methane gas resources. The aim is to provide a coal seam methane gas residual measurement system that can be quickly and accurately determined on-site.

In order to achieve the above object, the coal bed methane gas residual amount measurement system according to the present invention, the frame forming an outer shape; Two support rollers fixedly installed on the frame so as to be spaced apart from each other; A cylindrical canister placed between the two support rollers and sealed with a coal core and a rod mill inserted therein; A drive motor fixedly installed in the frame and generating power for rotating the canister; A power transmission device for rotating at least one of the two support rollers with the power generated by the drive motor; And a control device fixed to the inside of the frame to control the rotational speed of the drive motor.

In addition, the canister, the cylindrical body of the hollow portion; And a cover coupled to the body to seal the inside of the body and having at least one of a thermometer, a pressure gauge, a discharge valve, and a gas flow meter.

The canister may further include a control module for checking a measurement result of the pressure gauge and opening the discharge valve when the measured internal pressure exceeds a threshold pressure.

The canister may further include a control module configured to further include a notification device on the cover, to check a measurement result of the pressure gauge, and to operate a warning operation of the notification device when the pressure exceeds the limit pressure.

The rod mill may include at least one of a cylindrical rod mill and a protrusion rod mill having at least one grinding protrusion formed on an outer circumferential surface thereof.

In addition, the support rollers, the roller body is formed in the longitudinal direction along the rotation axis, the canister is placed; It may include a pivoting support coupled to both sides of the roller body rotatably fixed to the upper portion of the frame.

In addition, a friction coating layer may be formed on an outer circumferential surface of the roller body.

In addition, at both ends of the roller body may be separated from the escape to protrude from the outer circumferential surface.

In addition, the power transmission device, the first pulley is fixed to the motor shaft of the drive motor; A second pulley fixed to the rotation shaft of the support roller; And a belt connected to the first pulley and the second pulley to circulate and move.

In addition, the control device may control the operation, the rotation direction and the rotational speed of the drive motor according to the set operating time and rotational speed, and detect and display the result.

By means of the above solution, the present invention can be easily used in the drilling site of the coal core because of its simple structure, as well as crushing (less than 60 mesh) of the coal core for desorption of methane gas (residual gas). By doing so, there is an advantage that can accurately measure the residual amount of methane gas in the coal seam by the development of coal seam methane gas.

In addition, by controlling the rotation speed of the canister, in addition to the shape, number and combination of rod mills inserted into the canister together with the coal core, the sample (in accordance with the size, shape, physical and chemical properties of the coal core) By crushing the coal core), there is an effect that can be performed to optimize the methane gas sedimentation process.

In particular, by making it easy to measure the amount of residual gas of the coal core at the test site of the coal core, there is an advantage that can accurately measure the amount of the coal seam methane gas.

In addition, by controlling the crushing process of the coal core according to the characteristics of the coal seam for each drilling site, there is an effect that it is possible to accurately measure the residual amount of methane gas according to the characteristics of the coal core.

Through this, there is an effect that can provide accurate evidence required for the development of coal bed methane gas and the determination of commercial availability.

Therefore, it is possible to improve the reliability and competitiveness in the underground resource development field, particularly coal seam methane gas resource development field, as well as related or similar fields.

1 is a perspective view illustrating a coal seam methane gas residual amount measuring system according to the present invention.
2 is an exploded perspective view of FIG.
3 is an exploded perspective view illustrating the canister of FIG. 1.
4 is a perspective view illustrating that a gas flowmeter is further configured in the cover of FIG. 3.
5 is a perspective view illustrating that a control module and a notification device are further configured in the cover of FIG. 4.
6 is a view for explaining the operation of the canister according to the present invention.
FIG. 7 is a perspective view illustrating another example of the rod mill shown in FIG. 3.
8 is a perspective view illustrating the support roller shown in FIG. 1.
9 is a perspective view for explaining the operation of the main configuration to rotate the canister in FIG.

Examples of the coal bed methane gas residual amount measurement system according to the present invention can be applied in various ways, hereinafter with reference to the accompanying drawings will be described the most preferred embodiment.

1 is a perspective view illustrating a coal bed methane gas residual amount measurement system according to the present invention, Figure 2 is an exploded perspective view of FIG.

Referring to FIG. 1, the coal seam methane gas residual amount measuring system A includes a canister 100, a frame 200, a support roller 300, a drive motor 400, a power transmission device 500, and a control. Device 9600).

As shown in FIG. 1, the canister 100 is disposed between two support rollers 300, a coal core for measuring the amount of methane gas present therein, and a rod mill for crushing the coal core. It is inserted and sealed. Such a configuration of the canister 100 will be described in more detail below.

The frame 200 forms an external shape of the coal seam methane gas residual amount measuring system A, and wheels may be installed to be fixed to the lower side in order to improve mobility. In addition, the frame 200 may be formed in the form of a flutter (skeleton) in which each component can be fixed to a minimum area.

Two support rollers 300 are installed on the upper portion of the frame 200 so as to be rotatable and spaced apart from each other, and include a roller body 310 and a rotation support 320.

The roller body 310 is formed along the rotation shaft 311 in the longitudinal direction, and the canister 100 is placed between the two roller bodies 310 spaced apart from each other. Therefore, the separation distance of the support roller 300 is preferably set to be shorter than the diameter of the canister (100).

Rotating support 320 is rotatably coupled to both sides of the roller body 310, is fixed to the upper portion of the frame 200. For example, the rotation support 320 may be coupled to the rotation shaft 311 by a bearing, and may be coupled to the frame 200 by bolts.

The drive motor 400 is fixedly installed in the inside of the frame 200 (for example, the bottom surface) and generates power for rotating the canister 100. For example, the driving motor 400 may be operated to rotate the motor shaft (unsigned) by receiving electrical energy from an external power source.

The power transmission device 500 transmits the power generated by the driving motor 400 to at least one of the two support rollers 300, and rotates the support rollers 300, thereby rotating the driving motor 400. By transmitting to the support roller 300, the canister 100 can be rotated.

The control device 600 is fixedly installed in the inside of the frame 200 (for example, the bottom surface) and controls the rotation speed of the driving motor 400.

In addition, the control device 600 may control the operation (On-Off), the rotation direction and the rotation speed of the drive motor 400 according to the operation time and rotation speed set by the user, and detect and display the result. have.

To this end, the control device 600 is configured with a 'Power on-off' switch, a 'Timer on-off' switch, a 'Timer control' switch, a 'RPM meter' switch, a 'RPM control' switch and a display panel on one side. Can be.

3 is an exploded perspective view illustrating the canister of FIG. 1.

Referring to FIG. 3, the methane gas measuring canister 100 included in the coal core includes a body 110, a cover 120, a thermometer 130, a pressure gauge 140, and a rod mill 150.

The body 110 is for inserting and crushing the drilled coal core, the hollow portion 111 for crushing the coal core therein is formed to open to one side.

The cover 120 is coupled to the body 110 to seal the inside (hollow portion) of the body 110, and may be coupled to the body 110 to be separated.

In addition, the cover 120 may be directly screwed to the body 110, it may be coupled by a separate coupling means (for example, bolts). For example, when the cover 120 is coupled to the body 110 by bolts, the cover 120 and the body 110 have coupling holes (not shown) and coupling holes (not shown) in which the bolts are inserted and screwed. May be formed separately).

In addition, the cover 120 may include a sealing member (not shown), such as an O-ring, in a portion coupled with the body 110 to improve the sealing property inside the body 110.

The thermometer 130 is for measuring the temperature inside the body 110 and is installed to be exposed to the cover 120.

Thermometer 130 shown in Figure 3 is an electronic thermometer, the temperature inside the body 110 is output through a separate display device. Here, the display device for outputting the temperature may be configured to be fixed to one side of the cover 120. Of course, the thermometer 130 may be of a type that the user can visually check directly, such as the pressure gauge 140 shown in FIG.

The thermometer 130 measures the internal temperature of the body 110 during the crushing of the coal core, as well as the internal environment of the body 110 before crushing the coal core according to the depth of the corresponding coal layer (coal layer buried depth It can be used to correct to the same). For example, when the temperature inside the body 110 before crushing the coal core is higher or lower than the underground temperature of the actual coal bed, the body 110 may be cooled or heated while checking the thermometer 130. Here, the method of cooling or heating the body 110 may be variously applied according to the needs of those skilled in the art, and therefore it is not limited thereto.

The pressure gauge 140 is installed on the cover 120 in the same or similar manner as the thermometer 130, and is used to measure the pressure inside the body 110.

In addition, the pressure gauge 140, similar to the thermometer 130, measures the internal pressure of the body 110 during the crushing of the coal core, as well as the internal environment of the body layer before crushing the coal core to the underground pressure of the coal bed. Can be used to match.

In addition, when the internal pressure of the body 110 measured in the process of crushing the coal core exceeds the allowable pressure, the pressure gauge 140 stops the crushing operation of the coal core, thereby preventing accidents due to excessive pressure. It can be used to make it possible.

The rod mill 150 is inserted into the body 110 to crush the coal core, and is independently configured to move freely in the body 110.

In addition, as shown in FIG. 3, the rod mill 150 has a cylindrical basic rod mill 150 having an outer surface formed with a smooth curved surface, and a protrusion having a plurality of grinding protrusions 151 ′ as shown in FIG. 7. And a mold rod mill 150 '.

In the case of the protruding rod mill 150 ', it may be used to easily crush a coal core of a relatively large size at the beginning of the crushing process of the coal core.

In the case of the basic rod mill 150, a relatively small sized coal core crushed to some extent by the protrusion rod mill 150 'may be used to crush it to a sufficient size (60 mesh).

In addition, the canister 100 of the present invention is further installed in the cover 120, the discharge valve 160 for discharging the methane gas flowing from the coal core by the crushing of the coal core from the inside of the body 110 to the outside. Can be.

The thermometer 130, the pressure gauge 140, and the discharge valve 160 described above are components installed through the cover 120, and the body 110 in a state in which the cover 120 is coupled to the body 110. Naturally, it is necessary to ensure the internal sealing. Therefore, the thermometer 130, the pressure gauge 140, and the discharge valve 160 may be fixed to the cover 120 further includes a configuration such as a sealing member. Here, the sealing member may be variously modified depending on the configuration of the thermometer 130, the pressure gauge 140 and the discharge valve 160 and the coupling method with the cover 120.

4 is a perspective view illustrating that a gas flowmeter is further configured in the cover of FIG. 3.

Referring to FIG. 4, a gas flow meter 170 may be further installed at an end of the discharge valve 160 to measure the amount of methane gas (residual gas included in the coal core).

After the crushing of the coal core is completed by the canister 100 according to the present invention, the gas flow meter 170 may be coupled to the discharge valve 160 to measure the amount of methane gas inside the body 110. Of course, the gas flow meter 170 may be subjected to the crushing process of the coal core in a fixed state coupled to the discharge valve (160).

5 is a perspective view illustrating that a control module and a notification device are further configured in the cover of FIG. 4.

Referring to FIG. 5, the control module 180 may be further configured on the outer surface of the cover 120. Here, the control module 180 may be electrically connected to at least one of the thermometer 130, the pressure gauge 140, the discharge valve 160 and the gas flow meter 170, the electrical connection of each configuration is in accordance with the needs of those skilled in the art Since it may be changed in various ways, it is omitted in FIG.

For example, the control module 180 checks the measurement result of the pressure gauge 140, and when the measured internal pressure exceeds the threshold pressure, the discharge valve 160 is opened so that the internal pressure of the body 110 continues. The rise can be prevented. In this case, the control module 180 may receive and store the amount of methane gas discharged to the discharge valve 160 from the gas flow meter 170 and include the total amount of methane gas to be measured after the crushing process.

As another example, the control module 180 may check the measurement result of the pressure gauge 140, and when the measured internal pressure exceeds the threshold pressure, the crushing process of the coal core by the canister 100 may be stopped.

The control module 180 may be linked with the control device 600, it is preferable that the control module 180 is linked to a short-range wireless communication network to transmit and receive data even when the canister 100 is rotated.

In addition, the notification device 190 may be further configured on the outer surface of the cover 120.

The notification device 190 is for informing the user that the pressure in the body 110 exceeds the limit pressure, and the operation may be controlled by the control module 180. Here, the notification device 190 may include a lamp for emitting red light, a display for outputting text, and the like.

The control module 180 checks the measurement result of the pressure in the body 110 through the pressure gauge 140, and when the pressure in the body 110 exceeds the limit pressure, the alarm operation of the alarm device 190 Can be operated.

For example, when the notification device 190 includes a lamp, the control module 180 may perform a warning operation by the notification device 190 by turning on the lamp. As another example, when the notification device 190 is a display, the control module 180 may perform a warning operation by the notification device 190 by outputting a warning message.

6 is a view for explaining the operation of the canister according to the present invention.

Referring to FIG. 6, the protruding rod mill 150 ′ inserted into the body 110 moves in the rotation direction along the inner surface of the body 110 when the body 110 is rotated. Thereafter, when the protrusion rod mill 150 'is moved to a certain height, the protrusion rod mill 150' falls downward by its own load.

As a result, the coal core (not shown) inside the body 110 may be crushed by the protrusion-type rod mill 150 ′ that moves upward and falls by the rotation of the body 110. This process is the same in the case of the basic rod mill 150.

On the other hand, the height of the protrusion rod mill 150 ′ to move in the upper direction in the rotation of the body 110 will vary depending on the rotational speed of the body (110). In other words, the protruding rod mill 150 'moves as shown in FIG. 6 when the rotational speed of the body 110 is a high speed, and when the rotational speed of the body is a low speed, a predetermined portion of the lower portion of the body 110 is formed. It moves in a reciprocating manner.

Therefore, at the beginning of the crushing process of the coal core, by increasing the rotational speed of the body 110, it is possible to easily crush the coal core of a relatively large size, and then gradually reduce the rotational speed of the body 110 relatively It can be crushed into small coal cores.

In addition, the crushing of the coal core is more effective in the case of using both rod mills 150 and 150 'than in the case of using only one of the basic rod mill 150 and the protrusion rod mill 150'. It can be done more easily.

For example, in the case of the protruding rod mill 150 ', the coal core having a relatively large size can be easily crushed at the initial stage of the coal core crushing process, and in the case of the basic rod mill 150, the primary rod It can be used to crush crushed coal cores.

FIG. 7 is a perspective view illustrating another example of the rod mill shown in FIG. 3.

Referring to FIG. 7, the protruding rod mill 150 ′ may be formed in a form in which at least one grinding protrusion 151 ′ is formed on a surface of the basic rod mill 150.

At this time, the crushing protrusion 151 ′ formed on the surface of the protruding rod mill 150 ′ may be easier to crush the coal core as the compact structure is formed, but in the process of crushing the coal core, crushed coal flakes The case may be sandwiched between the grinding protrusions 151 ′, in which case the coal core may not be crushed smoothly.

Therefore, as shown in the enlarged portion of FIG. 7, the crushing protrusion 151 ′ of the protruding rod mill 150 ′ of the present invention is inclined to form a side portion 151 a ′, whereby the crushed coal pieces are crushed protrusion 151. Even if it is sandwiched between '), it can be easily removed.

On the other hand, since the canister 100 is rotated in a state of being placed on top of the support roller 300, in the process of being rotated to crush the coal core, the canister 100 is separated from the support roller 300 or exactly the rotation speed of the support roller 300 May not be matched and rotated (eg, in vain). Hereinafter, referring to FIG. 8, a method of preventing such an occurrence from occurring will be described.

8 is a perspective view illustrating the support roller shown in FIG. 1.

Referring to FIG. 8, a friction coating layer 312 may be formed on the outer circumferential surface of the roller body 310.

The friction coating layer 312 allows the canister 100 to be rotated by the correct rotational speed during rotation, and is prevented from moving away from the support roller 300 by being moved in the longitudinal direction of the support roller 300 during the rotation process. To do so, it may be formed of a synthetic resin material such as rubber.

In other words, by providing sufficient frictional force with respect to the contact portion between the canister 100 and the support roller 300, the canister 100 can be stably rotated by an accurate rotation speed.

Despite the friction coating layer 312 as described above, in order to prevent the canister 100 from being separated from the support roller 300, both ends of the roller body 310 protrude from the outer circumferential surface of the friction coating layer 312. It is possible to form a departure prevention tool (313).

9 is a perspective view for explaining the operation of the main configuration to rotate the canister in FIG.

Referring to FIG. 9, the power transmission device 500 includes a first pulley 510 fixed to the motor shaft of the drive motor 400 and a second pulley fixed to the rotation shaft 311 of the support roller 300. 520, and a belt 530 that circulates by connecting the first pulley 510 and the second pulley 520.

Accordingly, when the motor shaft is rotated by the driving motor 400, the first pulley 510 is rotated to circulate the belt 530, and when the second pulley 520 is rotated by the circulation of the belt 530. The support roller 300 may rotate to rotate the canister 100.

In addition, the first pulley 510, the second pulley 520, and the belt 530 of the power transmission device 500 may be configured to operate in engagement with a gear.

The coal bed methane gas residual amount measuring system according to the present invention has been described above. It will be understood by those skilled in the art that the technical features of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and therefore the meaning of the claims. And all changes or modifications derived from the scope and equivalent concept thereof should be construed as being included in the scope of the present invention.

A: Coal Bed Methane Residue Measurement System
100: canister 110: body
120: cover 130: thermometer
140: pressure gauge 150: rod mill
160: discharge valve 170: gas flow meter
180: control module 190: notification device
200: frame
300: support roller 310: roller body
311: pivot shaft 320: pivot support
400: drive motor
500: power train 510: first pulley
520: second pulley 530: belt
600: control device

Claims (10)

A frame forming an outer shape;
Two support rollers fixedly installed on the frame so as to be spaced apart from each other;
A cylindrical canister placed between the two support rollers and sealed with a coal core and a rod mill inserted therein;
A drive motor fixedly installed in the frame and generating power for rotating the canister;
A power transmission device for rotating at least one of the two support rollers with the power generated by the drive motor; And
Coal bed methane gas residual amount measurement system fixed to the inside of the frame comprising a control device for controlling the rotational speed of the drive motor.
The method of claim 1,
The canister is,
Cylindrical body of the hollow part; And
Coal bed methane gas residual amount measurement system is coupled to the body to seal the interior of the body and comprises at least one of a thermometer, a pressure gauge, a discharge valve and a gas flow meter.
3. The method of claim 2,
The canister is,
Checking the measurement results of the pressure gauge, and if the measured internal pressure exceeds the threshold pressure, further comprising a control module for opening the discharge valve, characterized in that the coal bed methane gas residual amount measurement system.
3. The method of claim 2,
The canister is,
Further configuring a notification device on the cover,
Checking the measurement results of the pressure gauge, if exceeding the threshold pressure, coal bed methane gas residual amount measurement system, characterized in that it further comprises a control module for operating a warning operation of the notification device.
The method according to any one of claims 1 to 4,
The rod mill,
A coal bed methane gas residual amount measurement system comprising at least one of a cylindrical basic rod mill and a projection rod mill having at least one grinding protrusion formed on an outer circumferential surface thereof.
The method of claim 1,
The support roller,
A roller main body formed in a longitudinal direction along a rotational shaft to which the canister is placed; And
Coal bed methane gas residual amount measurement system comprising a rotational support coupled to both sides of the roller body rotatably fixed to the upper portion of the frame.
The method according to claim 6,
Coal layer methane gas residual amount measurement system, characterized in that the friction coating layer is formed on the outer peripheral surface of the roller body.
8. The method of claim 7,
Coal bed methane gas residual amount measurement system, characterized in that the departure prevention port is formed to protrude from the outer peripheral surface at both ends of the roller body.
9. The method according to any one of claims 6 to 8,
The power transmission device includes:
A first pulley fixed to the motor shaft of the drive motor;
A second pulley fixed to the rotation shaft of the support roller; And
Coal bed methane gas residual amount measurement system comprising a belt for connecting the first pulley and the second pulley circulating movement.
The method of claim 1,
The control device includes:
Coal bed methane gas residual amount measurement system, characterized in that for controlling the operation, rotation direction and rotation speed of the drive motor according to the set operating time and rotation speed, and detect and display the result.

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