Underground separation device based on coal and heat co-production and using method thereof

Abstract

The invention relates to the technical field of coal and heat co-mining equipment, and discloses an underground separation device based on coal and heat co-mining and a using method thereof.The underground separation device comprises a first connecting pipe and a second connecting pipe, a filter screen plate is fixed in a flowing hole, and a plurality of electromagnetic blocks are fixed to the outer wall of an adjusting rotating ball; a first discharge outlet is formed in the outer wall of the first connecting pipe, a second discharge outlet is formed in the outer wall of the second connecting pipe, and a rubbing cushion block is fixed in the second connecting pipe. A filter screen plate and an electromagnetic block can be driven to rotate by adjusting rotation of a rotating ball, when coal hot water passes through a flowing hole, coal slag in the coal hot water can be filtered by the filter screen plate, some metal impurities in the coal hot water can be adsorbed by the electromagnetic block, and then the coal hot water is discharged from a first discharging opening and a second discharging opening. And meanwhile, impurities are prevented from being deposited in equipment such as a conveying pipeline, and therefore stable operation of the equipment can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of coal-thermal co-mining equipment technology, specifically to an underground separation device based on coal-thermal co-mining and its usage method. Background Technology

[0002] Coal, as an important basic energy source and industrial raw material in my country, occupies a key position in the energy structure. With the continuous increase in the depth of coal mining and the gradual decrease in the reserves of high-quality coal seams, traditional coal mining technologies face problems such as low resource recovery rate, low mining efficiency, and significant environmental impact. Coal-thermal co-mining technology, as a new type of integrated coal mining and thermal energy utilization technology, achieves efficient coal mining and recovers thermal energy from the coal seam by thermally processing the coal seam. It can not only improve the utilization efficiency of coal resources, but also effectively utilize geothermal resources, becoming an important development direction for the transformation and upgrading of the coal industry.

[0003] During coal-thermal co-mining, the coal seam is heated, causing the moisture within it to evaporate and condense, forming hot coal water. This hot coal water contains not only a large amount of solid particulate impurities such as coal powder and rock powder, but also dissolved minerals, heavy metal ions, and other pollutants from the coal seam. If this hot coal water is directly discharged or recycled during the mining process, it will easily cause solid particulate impurities to deposit and wear in underground pipelines, pumps, and other equipment, potentially leading to pipeline blockage and increased equipment failure rates. This will reduce the operational stability and service life of the underground mining system, increase equipment maintenance costs, and if the hot coal water is directly used in the underground heat circulation system, the impurities will affect the heat exchange efficiency, thereby reducing the overall energy utilization efficiency of coal-thermal co-mining. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an underground separation device and its usage method based on coal-thermal co-extraction, which solves the problems of filtering impurities in coal-thermal water, improving the subsequent utilization efficiency of coal-thermal water, preventing impurities from depositing in transportation pipelines and other equipment, and helping to ensure stable operation and extend the service life of the equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a downhole separation device based on coal-thermal co-extraction and its usage method, comprising a first connecting pipe and a second connecting pipe, wherein a fixing flange is fixed to one end of the first connecting pipe and the second connecting pipe respectively, an adjusting rotating ball is installed between the first connecting pipe and the second connecting pipe, the outer wall of the adjusting rotating ball is provided with multiple flow holes, a filter screen is fixed inside the flow holes, multiple electromagnetic blocks are fixed to the outer wall of the adjusting rotating ball, a first discharge port is provided on the outer wall of the first connecting pipe, a second discharge port is provided on the outer wall of the second connecting pipe, a scraping pad is fixed inside the second connecting pipe, an electromagnetic brake is fixed on the outer wall shaft of the adjusting rotating ball, an electric ring frame is detachably installed between the first connecting pipe and the second connecting pipe, an electric ring body is fixed inside the electric ring frame, and the electric ring body is electrically connected to the electromagnetic blocks.

[0006] Preferably, the bottom of the first discharge port and the second discharge port are respectively fixed with mounting frames, a threaded ring is fixed on one side of the mounting frame, a rotating rod is threadedly connected inside the threaded ring, a baffle is slidably installed inside the mounting frame, and one end of the rotating rod is rotatably connected to the inside of the baffle.

[0007] Preferably, a collection box is fixedly connected to the bottom of the mounting frame by bolts, and the collection box corresponds to the discharge ports of the first discharge port and the second discharge port.

[0008] Preferably, an mounting plate is fixed between the two collection boxes, a suction fan is fixed to the top of the mounting plate, a connecting pipe is fixed to the suction port of the suction fan, and the two ends of the connecting pipe are respectively connected and fixed to one side of the two collection boxes.

[0009] Preferably, a sealing gasket is provided between the first connecting pipe and the second connecting pipe, and the sealing gasket is sleeved on the outer wall shaft of the adjusting rotating ball.

[0010] Preferably, a filter plate is detachably installed on one side of the inside of the collection box, and the filter plate corresponds to one end of the connecting pipe.

[0011] Preferably, the scraping pad is located at the top of the second discharge port, and the number of filter plates is the same as the number of electromagnetic blocks.

[0012] A method for using an underground separation device based on coal-thermal co-extraction includes the following steps: S1: The staff first installs and fixes the first connecting pipe, the second connecting pipe, and the adjusting rotating ball. Then, the sealing gasket is used to increase the sealing between the first connecting pipe, the second connecting pipe, and the adjusting rotating ball to prevent leakage of hot coal water. Next, the fixing flange is used to connect and fix the two conveying pipes. After fixing, the hot coal water is conveyed. When the hot coal water enters between the first connecting pipe and the second connecting pipe, the impact force of the hot coal water itself will drive the adjusting rotating ball to rotate. The rotation of the adjusting rotating ball will drive the filter screen and the electromagnetic block to rotate. When the hot coal water passes through the flow hole, the solid impurities in the hot coal water will be filtered by the filter screen. During filtration, due to the continuous rotation of the adjusting rotating ball, the solid impurities that are filtered and trapped will be discharged in time through the first discharge port under the combined action of gravity and centrifugal force. Some metallic impurities in the coal-fired hot water will be absorbed by the electromagnetic block. The electromagnetic block is powered by the electric ring body. When the electromagnetic block rotates to the scraping pad, the scraping pad will scrape the metallic impurities adsorbed on the electromagnetic block, causing the metallic impurities to fall into the second discharge port below. During the rotation of the regulating rotating ball, the speed of the regulating rotating ball is stabilized by the electromagnetic brake, so as to avoid it being too fast or too slow and to ensure the stable flow of coal-fired hot water. S2: After a period of separation, the staff rotates the rotating rod, which in turn moves the baffle, thereby opening the outlets of the first and second discharge ports, so that the separated impurities enter the corresponding collection boxes for storage. S3: During separation, the staff turns on the suction fan and then delivers the suction power through the connecting pipe, which in turn generates suction inside the collection box. This increases the flowability of impurities when they enter the first and second discharge ports after separation, reducing the possibility of sticking and clogging.

[0013] This invention provides an underground separation device based on coal-thermal co-extraction and its usage method, which has the following beneficial effects: 1. This invention utilizes a filter screen to efficiently trap solid particles such as coal slag and rock powder in coal-fired hot water, while an electromagnetic block precisely captures metallic impurities. This achieves targeted separation of different types of impurities in the coal-fired hot water, significantly improving the impurity removal rate. The impurity content of the treated coal-fired hot water is greatly reduced, enhancing the efficiency and safety of subsequent recycling, while also meeting the water quality requirements for compliant discharge of coal-fired hot water. It avoids the problems of impurity deposition, scaling, and wear inside underground pipelines, pumps, heat exchangers, and other equipment, reducing the probability of pipeline blockages, equipment jamming, and other malfunctions. This lowers the maintenance frequency and repair costs of underground equipment, improves the operational stability of the entire coal-fired hot water extraction system, effectively extends the service life of core equipment such as pipelines and pumps, and reduces labor costs through automated operation.

[0014] 2. After the suction fan of this invention is started, the negative pressure air force generated is continuously delivered to the inside of the collection box through the connecting pipe, so that a negative pressure environment is formed in the collection box and a directional suction force is generated. For solid impurities such as coal slag that need to be discharged through the first discharge port after being filtered by the filter screen, the negative pressure suction force can provide additional power to accelerate the solid impurities from the surface of the filter screen and move towards the first discharge port. For metal impurities that have been scraped off by the scraping pad, the negative pressure suction force can effectively guide them to fall quickly to the second discharge port, avoiding the metal impurities from being stuck near the discharge port due to their light weight or the disturbance of the coal hot water flow. This improves the overall fluidity of the impurities when they enter the first and second discharge ports after separation, effectively reducing the situation where impurities adhere to the inner wall or channel of the first and second discharge ports due to stickiness, reducing the possibility of impurities accumulating and sticking in the discharge channel and causing blockage, ensuring the continuous smooth flow of impurities discharge, and further improving the stable operation efficiency of the entire separation device. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side-view perspective view of the present invention; Figure 3 This is a schematic diagram of the structure of the adjusting rotating ball of the present invention; Figure 4 This is a schematic diagram of the structure of the sealing gasket of the present invention; Figure 5 This is a schematic diagram of the structure of the connecting pipe in this invention; Figure 6 This is a schematic diagram of the mounting frame of the present invention.

[0016] Among them, 1. First connecting pipe; 2. Second connecting pipe; 3. Fixed flange; 4. Adjusting rotating ball; 401. Flow hole; 402. Filter screen plate; 403. Electromagnetic block; 404. First discharge port; 405. Second discharge port; 406. Scratching pad; 407. Electromagnetic brake; 408. Electric ring frame; 409. Electric ring body; 5. Mounting frame; 501. Threaded ring; 502. Rotating rod; 503. Baffle; 6. Collection box; 7. Mounting plate; 8. Fan; 9. Connecting pipe; 10. Sealing gasket; 11. Barrier filter plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example: Please refer to the appendix. Figure 1 -Appendix Figure 6 This invention provides an underground separation device based on coal-thermal co-extraction and its usage method, including a first connecting pipe 1 and a second connecting pipe 2. A fixing flange 3 is fixed to one end of the first connecting pipe 1 and the second connecting pipe 2 respectively. An adjusting rotating ball 4 is installed between the first connecting pipe 1 and the second connecting pipe 2. The outer wall of the adjusting rotating ball 4 has multiple flow holes 401. A filter screen plate 402 is fixed inside the flow holes 401. Multiple electromagnetic blocks 403 are fixed to the outer wall of the adjusting rotating ball 4. The outer wall of the first connecting pipe 1 has a first discharge port 404. The outer wall of the second connecting pipe 2 has a second discharge port 405. A scraping pad 406 is fixed inside the second connecting pipe 2. An electromagnetic brake 407 is fixed on the shaft of the outer wall of the adjusting rotating ball 4. An electric ring frame 408 is detachably installed between the first connecting pipe 1 and the second connecting pipe 2. An electric ring body 409 is fixed inside the electric ring frame 408. The wires of the electric ring body 409 are laid inside the shaft of the outer wall of the adjusting rotating ball 4 and electrically connected to the electromagnetic blocks 403. The bottom of the first discharge port 404 and the second discharge port 405 are respectively fixed with mounting frames 5. A threaded ring 501 is fixed on one side of the mounting frame 5. A rotating rod 502 is threadedly connected inside the threaded ring 501. A baffle 503 is slidably installed inside the mounting frame 5. One end of the rotating rod 502 is rotatably connected to the inside of the baffle 503. The bottom of the mounting frame 5 is fixedly connected to the collection box 6 by bolts. The collection box 6 corresponds to the discharge port of the first discharge port 404 and the second discharge port 405.

[0019] During use, the impact force of the hot coal water itself will drive the adjusting rotating ball 4 to rotate. The rotation of the adjusting rotating ball 4 will drive the filter screen plate 402 and the electromagnetic block 403 to rotate. When the hot coal water passes through the flow hole 401, solid impurities such as coal slag in the hot coal water will be filtered by the filter screen plate 402. During filtration, due to the continuous rotation of the adjusting rotating ball 4, the solid impurities trapped by the filter will be discharged in time through the first discharge port 404 under the combined action of gravity and centrifugal force. Some metallic impurities in the hot coal water will be filtered by the electromagnetic block 403. The electromagnetic block 403 is powered by the electric ring body 409. When the electromagnetic block 403 rotates to the scraping pad 406, the scraping pad 406 will scrape the metal impurities adsorbed on the electromagnetic block 403, so that the metal impurities fall into the second discharge port 405 below. Therefore, the impurities in the coal-heat water generated during coal-thermal co-mining can be separated in the whole process, thereby improving the subsequent utilization efficiency of coal-heat water and avoiding the deposition of impurities in the conveying pipeline and other equipment. This helps to ensure the stable operation of the equipment and extend its service life. During the separation process, the speed of the regulating rotating ball 4 can be stabilized by the electromagnetic brake 407, thereby preventing the regulating rotating ball 4 from rotating too fast due to excessive water flow impact or too slow due to insufficient water flow power. This ensures that the regulating rotating ball 4 always maintains a stable rotation speed, which in turn helps the coal-fired hot water to achieve a smooth and continuous flow in the pipeline. Staff can manually rotate the rotating rod 502 to drive the connected baffle 503 to move linearly along the preset track. When the baffle 503 moves to one side, the outlet channels of the first discharge port 404 and the second discharge port 405 will gradually unfold and fully open. At this time, solid impurities such as coal slag filtered by the filter screen plate 402, as well as metal impurities scraped off by the scraping pad 406, will enter the corresponding collection box 6 for classification and storage under the combined action of gravity and negative pressure suction along their respective discharge channels, thus facilitating subsequent retrieval and transportation by staff.

[0020] A mounting plate 7 is fixed between the two collection boxes 6. A suction fan 8 is fixed to the top of the mounting plate 7. A connecting pipe 9 is fixed to the suction port of the suction fan 8. The two ends of the connecting pipe 9 are respectively connected and fixed to one side of the two collection boxes 6. A sealing gasket 10 is provided between the first connecting pipe 1 and the second connecting pipe 2. The sealing gasket 10 is sleeved on the outer wall shaft of the adjusting rotating ball 4. A blocking filter plate 11 is detachably installed on one side of the inside of the collection box 6. The blocking filter plate 11 corresponds to one end of the connecting pipe 9. The scraping pad 406 is located at the top of the second discharge port 405. The number of filter screen plates 402 and electromagnetic blocks 403 are the same. The sealing gasket 10 between the first connecting pipe 1 and the second connecting pipe 2 is fitted onto the outer wall shaft of the adjusting rotating ball 4, forming a precisely fitting sealing structure. This not only fills the gaps at the connection points but also adapts to the rotational conditions of the adjusting rotating ball 4, preventing seal failure due to rotation. It blocks the leakage path of hot coal water, effectively preventing leakage of high-temperature, high-pressure hot coal water during transportation and separation, ensuring the safety of the underground working environment, and avoiding water waste and heat loss. The suction fan 8 is simultaneously connected to both collection boxes 6 via the connecting pipe 9, providing a stable negative pressure to both collection boxes 6 synchronously. This ensures balanced impurity discharge power at the first discharge port 404 and the second discharge port 405, avoiding blockage caused by insufficient suction at a single discharge port. A detachable filter plate 11 installed on one side inside the collection box 6 corresponds to one end of the connecting pipe 9, effectively intercepting pollutants stirred up inside the collection box 6. The filter plate 11 is designed to remove fine impurities, preventing them from being sucked into the blower 8 and causing impeller wear and pipe blockage, thus extending the service life of the blower 8 and reducing the maintenance cost of the negative pressure system. At the same time, the filter plate 11 is designed to be detachable, which is convenient for staff to clean or replace regularly, ensuring the continuity of the filtration and protection effect and ensuring the long-term stable operation of the negative pressure system. By having the same number of filter screens 402 and electromagnetic blocks 403, when the coal-fired hot water flows through the flow hole 401 of the regulating rotating ball 4, each flow can be filtered by the corresponding filter screen 402 and adsorbed by the electromagnetic block 403 at the same time, realizing the synchronous and balanced separation of solid particulate impurities and metal impurities. At the same time, the staggered arrangement of the filter screens 402 and electromagnetic blocks 403 can block the first discharge port 404 at the electromagnetic block 403 when the filter screen 402 is filtering, thereby preventing coal-fired hot water leakage.

[0021] Working principle: First, the operator installs and fixes the first connecting pipe 1, the second connecting pipe 2, and the adjusting rotating ball 4. Then, a sealing gasket 10 is used to increase the seal between these components to prevent leakage of the hot coal water. Next, the fixing flange 3 is used to connect and fix the two conveying pipes. After fixing, the hot coal water is conveyed. When the hot coal water enters between the first connecting pipe 1 and the second connecting pipe 2, the impact force of the hot coal water itself will drive the adjusting rotating ball 4 to rotate. The rotation of the adjusting rotating ball 4 will drive the filter screen 402 and the electromagnetic block 403 to rotate. When the hot coal water passes through the flow hole 401, solid impurities such as coal slag in the hot coal water will be filtered by the filter screen 402. During filtration, due to the adjusting... As the throttling ball 4 rotates continuously, the solid impurities filtered and trapped are discharged in time through the first discharge port 404 under the combined action of gravity and centrifugal force. Some metallic impurities in the coal-fired hot water are absorbed by the electromagnetic block 403, which is powered by the electric ring body 409. When the electromagnetic block 403 rotates to the scraping pad 406, the scraping pad 406 scrapes the metallic impurities adsorbed on the electromagnetic block 403, causing the metallic impurities to fall into the second discharge port 405 below. Therefore, the impurities in the coal-fired hot water generated during coal-fired co-mining can be separated in the entire process, thereby improving the subsequent utilization efficiency of the coal-fired hot water and preventing impurities from depositing in the conveying pipelines and other equipment. This helps to ensure the stable operation of the equipment and extend its service life.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal and heat co-mining based underground separation device, comprising a first connecting pipe (1) and a second connecting pipe (2), one end of each of the first connecting pipe (1) and the second connecting pipe (2) is fixed with a fixed flange (3), characterized in that, The first connecting pipe (1) and the second connecting pipe (2) are rotatably connected with the adjusting rotating ball (4), the outer wall of the adjusting rotating ball (4) is provided with a plurality of flow holes (401), the inside of the flow hole (401) is fixedly connected with a filter screen plate (402), the outer wall of the adjusting rotating ball (4) is fixedly connected with a plurality of electromagnetic blocks (403), the outer wall of the first connecting pipe (1) is provided with a first discharge port (404), the outer wall of the second connecting pipe (2) is provided with a second discharge port (405), the inside of the second connecting pipe (2) is fixedly connected with a scraping pad (406), the outer wall shaft of the adjusting rotating ball (4) is fixedly connected with an electromagnetic brake (407), the first connecting pipe (1) and the second connecting pipe (2) are detachably connected with an electric ring frame (408), the inside of the electric ring frame (408) is fixedly connected with an electric ring body (409), and the electric ring body (409) is electrically connected with the electromagnetic block (403).

2. A coal and heat co-mining based underground separation apparatus according to claim 1, characterized in that, The bottom of the first discharge port (404) and the second discharge port (405) is fixedly connected with a mounting frame (5), one side of the mounting frame (5) is fixedly connected with a threaded ring (501), the inside of the threaded ring (501) is screw-connected with a rotating rod (502), the inside of the mounting frame (5) is slidably connected with a baffle (503), and one end of the rotating rod (502) is rotatably connected with the inside of the baffle (503).

3. A coal and heat co-mining based in-mine separation apparatus according to claim 2, characterized in that, The bottom of the mounting frame (5) is fixedly connected with a collecting box (6) through bolts, and the collecting box (6) corresponds to the discharge port of the first discharge port (404) and the second discharge port (405).

4. A coal and heat co-mining based underground separation apparatus according to claim 3, characterized in that, The two collecting boxes (6) are fixedly connected with a mounting plate (7), the top of the mounting plate (7) is fixedly connected with a suction fan (8), the suction port of the suction fan (8) is fixedly connected with a communication pipe (9), and the two ends of the communication pipe (9) are fixedly connected with one side of the two collecting boxes (6).

5. A coal and heat co-mining based in-mine separation apparatus according to claim 1, characterized in that, The first connecting pipe (1) and the second connecting pipe (2) are provided with a sealing gasket (10), and the sealing gasket (10) is sleeved on the outer wall shaft of the adjusting rotating ball (4).

6. A coal and heat co-mining based in-mine separation apparatus according to claim 3, wherein, The inside of the collecting box (6) is detachably connected with a blocking filter plate (11), and the blocking filter plate (11) corresponds to one end of the communication pipe (9).

7. A coal and heat co-mining based in-mine separation apparatus according to claim 1, wherein, The scraping pad (406) is located at the top of the second discharge port (405), and the number of the filter screen plate (402) and the electromagnetic block (403) is the same.

8. A method of using a coal and heat co-mining based in-mine separation device according to any one of claims 1-7, wherein, The specific use method is as follows: S1: The staff first installs and fixes the first connecting pipe (1), the second connecting pipe (2) and the adjusting rotating ball (4). Then, the sealing gasket (10) is used to increase the sealing between the first connecting pipe (1), the second connecting pipe (2) and the adjusting rotating ball (4) to prevent leakage of hot coal. Then, the fixed flange (3) is used to connect and fix the two conveying pipes. After fixing, the hot coal is conveyed. At this time, the hot coal enters the connecting pipe between the first connecting pipe (1) and the second connecting pipe (2). The impact force of the hot coal will drive the adjusting rotating ball (4) to rotate. The rotation of the adjusting rotating ball (4) will drive the filter screen (402) and the electromagnetic block (403) to rotate. When the hot coal passes through the flow hole (401), the solid impurities in the hot coal will be filtered by the filter screen (402). During the filtration, due to the continuous rotation of the adjusting rotating ball, the solid impurities that are filtered and intercepted will be discharged in time through the first discharge port (404) under the combined action of gravity and centrifugal force. Some metallic impurities in the coal-fired hot water will be absorbed by the electromagnetic block (403). The electromagnetic block (403) is supplied with electricity through the electric ring body (409). When the electromagnetic block (403) rotates to the scraping pad (406), the scraping pad (406) will scrape the metallic impurities adsorbed on the electromagnetic block (403), so that the metallic impurities fall into the second discharge port (405) below. During the rotation of the regulating rotating ball (4), the speed of the regulating rotating ball (4) can be stabilized by the electromagnetic brake (407), so as to avoid being too fast or too slow and ensure the stable flow of coal-fired hot water. S2: After a period of separation, the staff rotates the rotating rod (502), which in turn moves the baffle (503) to open the outlets of the first discharge port (404) and the second discharge port (405), so that the separated impurities enter the corresponding collection box (6) for storage. S3: During separation, the staff turns on the suction fan (8) and then delivers the suction power through the connecting pipe (9), which in turn generates suction inside the collection box (6), thereby increasing the flow of impurities when they enter the first discharge port (404) and the second discharge port (405) after separation, and reducing the possibility of sticking and clogging.

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