Underground coal gasification operation device and system

Abstract

The invention relates to the technical field of underground energy development intelligent equipment, in particular to an underground coal gasification operation device and system.The underground coal gasification operation device comprises a plurality of movable joints which are sequentially connected, and every two adjacent movable joints can move relatively; the multifunctional operation head is used for measuring temperature and igniting; the driving tendon is used for controlling the relative movement between the two adjacent movable joints; the multifunctional operation head is provided with a temperature measuring opening and an ignition opening, the three-dimensional coordinates of the multifunctional operation head are accurately positioned through the bending state of the movable joint, the multifunctional operation head is matched with complex coal seam geology, the ignition position is accurately controlled, and the ignition success rate is increased. When the operation head moves to operate, the temperature measuring port detects the temperature in real time, multi-source data association analysis is integrated, and the monitoring effect is greatly optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent equipment for underground energy development, and in particular to an underground coal gasification operation device and system. BACKGROUND

[0002] Underground coal gasification is an important technology for converting underground coal into combustible gas in situ, and its core process includes two key links: "start-up ignition" and "steady-state monitoring". Currently, these two links are usually completed by independent systems and equipment, and the specific status and existing problems are as follows: fixed or simple lifting type igniters are mostly used in the ignition link; and pre-embedded fixed thermocouples or distributed optical fibers are mainly relied on in the temperature monitoring link.

[0003] Currently, the traditional ignition link has problems such as inaccurate positioning, inability to adapt to complex coal seam geological structures, and low ignition success rate; and the temperature monitoring link has limitations such as fixed measurement position, inability to track the gasification front, and data lag; Ignition and temperature measurement are independently set, and there is no mutual correlation between the two, which leads to the following problems: multiple different equipment needs to be lowered during operation, resulting in low operation efficiency and high cost; in addition, ignition data and subsequent temperature monitoring data are difficult to correlate and analyze in a unified space-time coordinate, and real closed-loop intelligent control cannot be achieved; once the fixed equipment fails due to gasification cavity deviation, the entire monitoring system will be paralyzed.

[0004] Therefore, there is an urgent need for an operation device that integrates ignition, temperature measurement, and threading functions, and can actively adapt to complex underground environments to achieve full-process automation from ignition start-up to steady-state monitoring. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to solve the problems of separation of ignition and temperature measurement equipment in existing underground coal gasification operations and weak adaptability to complex coal seams, overcome the pain points of low operation efficiency, non-uniformity of data space-time, and poor equipment reliability, and provide an integrated device that integrates multiple functions and can freely bend to achieve full-process automation from precise ignition to dynamic temperature measurement and adapt to underground harsh environments.

[0006] The above technical problems are solved by the following technical solutions: the present application provides an underground coal gasification operation device, comprising, a plurality of movable joints are connected in sequence, a multifunctional operation head for temperature measurement and ignition, a driving tendon for controlling the relative movement between adjacent two movable joints, a temperature measurement port and an ignition port are provided on the multifunctional operation head.

[0007] In a preferred embodiment of the underground coal gasification operation device, the movable joint comprises a base and a ball head arranged on the base, and a ball groove arranged in the base; The size of the ball groove matches the size of the ball head; The adjacent two movable joints are connected through the ball head and the ball groove.

[0008] In a preferred embodiment of the underground coal gasification operation device, the base is provided with symmetrically arranged side grooves.

[0009] In a preferred embodiment of the underground coal gasification operation device, the side grooves on the adjacent two movable joints are arranged in a staggered manner.

[0010] In a preferred embodiment of the underground coal gasification operation device, the driving tendon is composed of a servo motor and an elastic alloy wire, and the movable joint is controlled to move by winding the elastic alloy wire through the servo motor.

[0011] In a preferred embodiment of the underground coal gasification operation device, a medium channel is arranged in the movable joint. A wire harness set is arranged in the medium channel. The medium channel is used for introducing a cooling medium.

[0012] In a preferred embodiment of the underground coal gasification operation device, the medium channel comprises a first expansion chamber, a connecting chamber and a second expansion chamber arranged in the movable joint in sequence.

[0013] In a preferred embodiment of the underground coal gasification operation device, the multifunctional operation head is further provided with a blowing port.

[0014] In a preferred embodiment of the underground coal gasification operation device, the multifunctional operation head is provided with a first chamber, a second chamber and a third chamber. The first chamber, the second chamber and the third chamber are respectively arranged corresponding to the temperature measuring port, the ignition port and the blowing port.

[0015] The application further provides an underground coal gasification operation system comprising the underground coal gasification operation device, and further comprising, a comprehensive control unit located on the ground and used for controlling the underground coal gasification operation device; The comprehensive control unit comprises, a motion control subsystem used for controlling the driving tendon to control the motion of the underground coal gasification operation device; The energy management subsystem provides energy for both the ignition and temperature measurement functions. The data fusion processing subsystem is used to synchronously process multi-source data from the multi-functional operation head and construct a dynamic temperature model of the underground gasification chamber. The multi-source data includes temperature data, location data, and ignition time data; A human-computer interaction interface is used to display all information and allow operators to issue instructions.

[0016] The beneficial effects of this invention are as follows: By combining the morphological features of the device with the current bending state of each movable joint, the operator can accurately understand the three-dimensional coordinates of the current multi-functional working head, facilitating its positioning. It can be applied to complex coal seam geological structures. Since the multi-functional working head can move in any direction, the ignition position can be precisely controlled, effectively avoiding ignition failure and improving the ignition success rate. During the movement and operation of the multi-functional working head, the temperature measuring port can monitor the temperature of the ignition position or the surrounding coal in real time. It can integrate and correlate multi-source data by combining ignition data, real-time temperature monitoring, and the current coordinates of the multi-functional working head, thereby improving the monitoring effect of the monitoring system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] Figure 1 A schematic diagram of the overall structure of the underground coal gasification operation unit is shown.

[0019] Figure 2 A schematic diagram of the front-end structure of an underground coal gasification operation device is shown.

[0020] Figure 3 A schematic diagram of the movable joint structure of the underground coal gasification operation device is shown.

[0021] Figure 4 A cross-sectional view of the movable joint of the underground coal gasification operation unit is shown.

[0022] Figure 5 A schematic diagram of the operation process of the underground coal gasification unit is shown. Figure 1 .

[0023] Figure 6 A schematic diagram of the operation process of the underground coal gasification unit is shown. Figure 2 .

[0024] Figure 7A schematic diagram of the operation process of the underground coal gasification unit is shown. Figure 3 .

[0025] Figure 8 A schematic diagram of the connection structure of the wiring harness and medium channel of the underground coal gasification operation device is shown.

[0026] In the diagram: 1. Movable joint; 11. Base; 12. Ball head; 13. Ball groove; 14. Side groove; 2. Multifunctional working head; 21. Temperature measuring port; 211. First chamber; 22. Ignition port; 221. Second chamber; 23. Purge port; 231. Third chamber; 3. Driving tendon; 4. Medium channel; 41. First expansion chamber; 42. Connecting chamber; 43. Second expansion chamber; 5. Wiring harness. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0029] Reference Figures 1-8 This embodiment provides an underground coal gasification operation device, including, Movable joint 1, which is provided with several connected in sequence, allows relative movement between two adjacent movable joints 1; specifically, refer to Figure 1 and Figure 2 The movable joints 1 are connected end to end, and two adjacent movable joints 1 can move freely to achieve bending. During operation, the shape of the unit can be adjusted to move to any position for operation.

[0030] The multi-functional working head 2 is used for temperature measurement and ignition. Specifically, the multi-functional working head 2 is equipped with a temperature measuring port 21 and an ignition port 22. The temperature measuring port 21 is equipped with a temperature sensor, which is a high-temperature thermocouple, used to directly measure the temperature of the ignition point and the surrounding coal and rock. The ignition port 22 is equipped with a high-voltage electric arc igniter, used to ignite the coal pile.

[0031] Preferably, the multi-functional working head 2 is also equipped with an environmental sensor, which is used to monitor changes in gas composition and determine whether the reactants have been successfully ignited and entered a stable state.

[0032] The driving tendon 3 is used to control the relative movement between two adjacent movable joints 1, enabling arbitrary rotation between the movable joints 1.

[0033] Reference Figure 5 The underground coal gasification operation device is inserted into the coal seam through the wellhead. The bending of the movable joints 1 is controlled by the drive tendon 3. As the insertion depth of the underground coal gasification operation device increases, it eventually reaches the target combustion zone. (Refer to...) Figure 6 Then, ignition is performed through ignition port 22, causing the coal in the target combustion zone to burn and creating a combustion air zone, as shown in the figure. Figure 7 By programming and controlling the drive tendon 3, the position of the multi-functional working head 2 can be changed. The multi-functional working head 2 can move to ignition position 1 and ignition position 2 respectively for secondary ignition, so that the target combustion zone can be accelerated to burn. In addition, during the ignition process, the temperature can be measured in real time through the temperature measuring port 21. As the position of the multi-functional working head 2 changes, the position of the temperature measuring port 21 can also change in real time, so that the staff can have a comprehensive understanding of the coal seam conditions.

[0034] In summary, by combining the morphological characteristics of the underground coal gasification operation device with the current bending state of each movable joint 1, the operator can accurately understand the three-dimensional coordinates of the current multi-functional operation head 2, facilitating its positioning. This method is applicable to complex coal seam geological structures. Since the multi-functional operation head 2 can move in any direction, the ignition position can be precisely controlled, effectively avoiding ignition failure and improving the ignition success rate. During the movement and operation of the multi-functional operation head 2, the temperature measuring port 21 can monitor the temperature of the coal at or around the ignition position in real time. It can integrate and correlate multi-source data by combining ignition data, real-time temperature monitoring, and the current coordinates of the multi-functional operation head 2, thereby improving the monitoring effect of the monitoring system.

[0035] Furthermore, the movable joints 1 of the present invention are in a movable state. The geological structure of underground coal seams is complex and may contain fissures, faults or undulations. Rigid or semi-rigid ignition devices are difficult to effectively fit or reach the preset ignition position, resulting in ignition failure or low efficiency. However, the underground coal gasification operation device of the present invention is a flexible and movable structure, which is more conducive to underground ignition operation. It has a certain degree of flexibility underground, making it easier to find weak points in the coal seam when entering, and the equipment is not easily damaged by coal seam falling and crashing.

[0036] Reference Figures 1-8As an optional embodiment: the movable joint 1 includes a base 11 and a ball head 12 disposed on the base 11, and also includes a ball groove 13 disposed in the base 11. The base 11 and the ball head 12 are integral structures, and the size of the ball groove 13 matches the size of the ball head 12. Two adjacent movable joints 1 are connected by the ball head 12 and the ball groove 13.

[0037] The base 11 is provided with symmetrically opened side grooves 14. The side grooves 14 can increase the maximum deflection angle between two adjacent movable joints 1, thereby improving the deflection angle between two adjacent movable joints 1.

[0038] The side grooves 14 on two adjacent movable joints 1 are staggered. The staggered side grooves 14 can improve the deflection angle of multiple combined movable joints 1 in various directions.

[0039] Reference Figures 1-8 As an optional embodiment, the driving tendon 3 is composed of a servo motor and an elastic alloy wire. The servo motor winds the elastic alloy wire to control the movement of the movable joint 1. Specifically, the elastic alloy wire is a superelastic nickel-titanium alloy wire. At least two driving tendons 3 are provided between each pair of adjacent movable joints 1 to achieve deflection in at least one degree of freedom. Preferably, at least four driving tendons 3 are provided between each pair of adjacent movable joints 1, respectively located at the four corners of the base 11. The servo motor winds the elastic alloy wire at the corresponding positions to change its length, thereby controlling the rotation between the movable joints 1. This enables continuous, multi-degree-of-freedom serpentine movement in three-dimensional space during operation, allowing autonomous movement through complex coal seam fractures. To adapt to the high-temperature particulate matter and hydrogen sulfide corrosion environment during underground ignition, the movable joint 1 is made of a nickel-based high-temperature alloy, which has good wear resistance at high temperatures and excellent anti-sulfurization properties.

[0040] Reference Figures 1-8 As an optional embodiment, it also includes a medium channel 4 disposed within the movable joint 1; and a wire harness 5 disposed within the medium channel 4; the wire harness 5 includes signal cables and dedicated ignition energy circuits, and the external wrapping material is silicone rubber modified polyimide to improve its temperature resistance.

[0041] Medium channel 4 is used to introduce cooling medium.

[0042] Medium channel 4 not only serves as a channel for the wire harness, containing and protecting it, but also as a channel for transporting cooling medium. By injecting cooling gas into medium channel 4, the wire harness can be cooled down, and the underground coal gasification operation device can be cooled down to prevent the equipment from being damaged due to high temperature, thus extending the service life of the equipment.

[0043] Reference Figure 4The medium channel 4 includes a first expansion chamber 41, a connecting chamber 42, and a second expansion chamber 43 sequentially disposed within the movable joint 1. The expansion of the first expansion chamber 41 and the second expansion chamber 43 can protect the wire harness and prevent the wire harness from being cut and damaged when the movable joint 1 moves.

[0044] The multi-functional working head 2 is also equipped with a blow-out port 23, which is used to spray out cooling gas to clean the dust in front of the path. In addition, it cleans and cools the front end of the multi-functional working head 2. The blow-out port 23 is composed of a nozzle. When blowing is required, the cooling gas reaches a certain pressure and is sprayed out through the nozzle to complete the blowing task. At the same time, the cooling gas will always fill and protect the various circuits in the medium channel from the effects of high temperature.

[0045] The multi-functional working head 2 is provided with a first chamber 211, a second chamber 221, and a third chamber 231. The first chamber 211, the second chamber 221, and the third chamber 231 are respectively set to the temperature measuring port 21, the ignition port 22, and the purge port 23. The cooling medium is delivered to the corresponding temperature measuring port 21, ignition port 22, and purge port 23 through the first chamber 211, the second chamber 221, and the third chamber 231, respectively. It can not only cool the ignition port 22 and the temperature measuring port 21, but also perform purging operations using the purge port 23.

[0046] As an optional embodiment: the present invention also proposes an underground coal gasification operation system, including an underground coal gasification operation device, and further comprising, The integrated control unit, located on the ground, is used to control the underground coal gasification operation equipment.

[0047] The integrated control unit includes, The motion control subsystem is used to control the drive tendon 3 to control the movement of the underground coal gasification operation device; The energy management subsystem provides energy for both ignition and temperature measurement functions; it includes a high-voltage power supply for ignition and a low-voltage power supply for temperature measurement.

[0048] The data fusion processing subsystem is used to synchronously process multi-source data such as temperature and location from the multi-functional working head 2, and to construct a dynamic temperature model of the underground gasification chamber. Multi-source data also includes ignition time data, gas composition, injection rate, and injection composition.

[0049] A human-computer interaction interface, which is used to display all information and allow operators to issue instructions; It should be noted that the position information of the multi-functional working head 2 is obtained from the attitude of the underground coal gasification working device.

[0050] The workflow of this invention is as follows: 1. Exploration and navigation phase: The device is lowered downhole, and the operator uses the location data to control the device to navigate through complex paths to the predetermined ignition target area.

[0051] 2. Precision ignition stage: After positioning, start ignition port 22; simultaneously record the precise time and position of ignition start.

[0052] 3. In-situ real-time monitoring stage: After successful ignition, the ignition port 22 can be partially or completely de-energized, and the device does not need to be evacuated, immediately switching to online monitoring mode. Subsequently, the temperature measuring port 21 continuously monitors the temperature changes in the ignition core area and generates a temperature change curve; the environmental sensor monitors the changes in gas composition to determine whether the reactants have been successfully ignited and entered a stable state.

[0053] 4. Dynamic tracking and scanning stage: As the gasification reaction proceeds, the operator can remotely control the device and move it slightly to track the expansion of the gasification front and map the temperature field inside the gasification chamber.

[0054] 5. Decision and Control Stage: The collected real-time temperature is compared with the model preset value to provide accurate reference data, which facilitates the operator to make adjustments, such as adjusting the gas injection rate and gas composition.

[0055] Specific workflow: In actual operation, this device first descends to the underground coal seam through pre-drilled holes, typically 100m-1000m deep, and enters the initial ignition position for ignition. Figures 5-7 During underground coal gasification, after the first ignition, a complex cavity is formed in the nearby underground coal gasification. The conventional approach is to re-drill holes and ignite again. However, this device can move flexibly within the complex cavity formed by underground coal gasification to reach a new ignition position and perform the ignition action again, while acquiring the latest temperature data. This eliminates the need for the complex work of drilling holes again, which can significantly reduce labor costs.

[0056] In summary, by integrating the two major functions of "ignition" and "monitoring" into one, "one-click" operation is achieved, significantly improving operational efficiency and equipment utilization, reducing costs, and enabling a seamless switch from "ignition" to "monitoring." A complete dataset with a unified spatiotemporal reference is obtained, covering the entire process from reaction initiation to steady state. This provides unprecedented data support for scientific research and process optimization. Based on multi-sensor fusion data, operators gain a more comprehensive understanding of underground data, facilitating production process control and avoiding multiple trips up and down the well required by using single-function equipment, thus reducing the risk of equipment damage. Simultaneously, the flexible movable joint 1 ensures that the sensor can always effectively align with the target, avoiding the problem of easy failure of fixed sensors. The medium channel 4 not only provides a path for the wiring but also provides heat dissipation protection for the device, preventing damage.

[0057] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An underground coal gasification operation device, characterized in that: include, The movable joint (1) is provided with several connected in sequence, and relative movement can be generated between two adjacent movable joints (1); Multifunctional working head (2), which is used for temperature measurement and ignition; Driven tendon (3) for controlling the relative movement between two adjacent active joints (1); The multi-functional working head (2) is equipped with a temperature measuring port (21) and an ignition port (22).

2. The underground coal gasification operation device according to claim 1, characterized in that: The movable joint (1) includes a base (11), a ball head (12) disposed on the base (11), and a ball groove (13) disposed in the base (11). The dimensions of the ball groove (13) and the ball head (12) are matched; The two adjacent movable joints (1) are connected by a ball head (12) and a ball groove (13).

3. The underground coal gasification operation device according to claim 2, characterized in that: The base (11) is provided with symmetrically opened side grooves (14).

4. The underground coal gasification operation device according to claim 3, characterized in that: The side grooves (14) on two adjacent movable joints (1) are staggered.

5. The underground coal gasification operation device according to any one of claims 1 to 4, characterized in that: The driving tendon (3) is composed of a servo motor and an elastic alloy wire. The servo motor winds up the elastic alloy wire to control the movement of the movable joint (1).

6. The underground coal gasification operation device according to claim 1, characterized in that: It also includes a medium channel (4) located within the movable joint (1); And the wire harness assembly (5) disposed within the medium channel (4); The medium channel (4) is used to introduce cooling medium.

7. The underground coal gasification operation device according to claim 6, characterized in that: The medium channel (4) includes a first expansion chamber (41), a connecting chamber (42), and a second expansion chamber (43) sequentially disposed within the movable joint (1).

8. The underground coal gasification operation device according to claim 6 or 7, characterized in that: The multi-functional working head (2) is also equipped with a purge port (23).

9. The underground coal gasification operation device according to claim 8, characterized in that: The multi-functional working head (2) is provided with a first chamber (211), a second chamber (221), and a third chamber (231); The first chamber (211), the second chamber (221), and the third chamber (231) are respectively provided for the temperature measuring port (21), the ignition port (22), and the purge port (23).

10. An underground coal gasification operation system, characterized in that: The underground coal gasification operation apparatus, including any one of claims 1 to 9, further includes, The integrated control unit, located on the ground, is used to control the underground coal gasification operation unit; The integrated control unit includes, The motion control subsystem is used to control the drive tendon (3) to control the movement of the underground coal gasification operation device; The energy management subsystem provides energy for both the ignition and temperature measurement functions. The data fusion processing subsystem is used to synchronously process multi-source data from the multi-functional work head (2) and construct a dynamic temperature model of the underground gasification chamber; The multi-source data includes temperature data, location data, and ignition time data; A human-computer interaction interface is used to display all information and allow operators to issue instructions.

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