Coal gasification gas water purification treatment system

Abstract

The present application relates to coal gas water treatment technical field, and disclose a kind of coal gasification coal gas water purification treatment system, including pretreatment pool, the side of the pretreatment pool is provided with biochemical treatment pool, the side of the biochemical treatment pool is provided with depth treatment pool, the inside of the biochemical treatment pool is equipped with pipe support, the inside of the pipe support is equipped with membrane filament.The present application can realize two-stage plugging of pipeline when membrane filament breaks during the process of treating coal gas water, so that the coal gas water that is not filtered and is sucked into the membrane filament due to membrane filament breakage will not enter the cross pipe, and thus will not enter the pipe support and contaminate the pipe support and cross pipe. By two-stage plugging of pipeline, the plugging effect is good, the anti-pollution effect of the pipe support and cross pipe is improved, and the circular end can be ensured to be free of impurities accumulation before plugging. With the plugging ball free of impurities accumulation, the plugging of pipeline can be better performed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal gas water treatment, and particularly relates to a purification treatment system for coal gas water after coal gasification. BACKGROUND

[0002] Coal gas water produced after coal gasification is a kind of wastewater with complex components, and needs to be purified before being discharged.

[0003] The existing coal gas water treatment system generally consists of a pretreatment system, a biochemical treatment system and a deep treatment system, the coal gas water is subjected to oil removal and phenol removal through the pretreatment system, the coal gas water is subjected to organic matter degradation through the biochemical treatment system, and the coal gas water is subjected to coagulation sedimentation, filtration and membrane separation treatment through the deep treatment system, so as to further remove fine particles and organic matter, soluble organic matter, heavy metal ions, ammonia nitrogen and other pollutants.

[0004] In the above treatment process, when the coal gas water is subjected to biochemical treatment, an MBR biological membrane reactor needs to be used, and when the membrane wire of the existing MBR biological membrane reactor breaks during use, a large amount of untreated coal gas water will directly enter the membrane wire without filtration, polluting various pipeline systems connected with the membrane wire.

[0005] Therefore, it is necessary to invent a purification treatment system for coal gas water after coal gasification to solve the above problems. SUMMARY

[0006] In view of the above problems, the present application provides a purification treatment system for coal gas water after coal gasification to solve the problems proposed in the background art.

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] A purification treatment system for coal gas water after coal gasification, comprising a pretreatment tank, a biochemical treatment tank is arranged on one side of the pretreatment tank, a deep treatment tank is arranged on one side of the biochemical treatment tank, a pipe support is arranged in the biochemical treatment tank, a membrane wire is arranged in the pipe support, and an anti-pollution assembly for preventing sewage from entering the inside of the pipe support after the membrane wire breaks is arranged in the pipe support.

[0009] The anti-pollution assembly comprises a horizontal pipe, a rectangular shell, a pipe, a rectangular block, a sealing ring, a pushing assembly for pushing the rectangular block to move vertically, and a plugging assembly for plugging the pipe.

[0010] The transverse pipe is fixedly installed equidistantly in the interior of the pipe frame, the rectangular shell is fixedly installed equidistantly on the transverse pipe, the pipeline communicates the rectangular shell and the transverse pipe, the rectangular block is slidably arranged in the interior of the rectangular shell, the sealing ring is fixedly sleeved on the exterior of the rectangular block, and the rectangular block is fixedly sleeved on the end of the membrane wire.

[0011] Further, the pushing assembly comprises a baffle and a first spring.

[0012] The baffle is fixedly installed at one end of the rectangular shell away from the transverse pipe, the first spring fixedly connects the baffle and the rectangular block, and the first spring is in a compressed state when the membrane wire is not broken.

[0013] Further, the plugging assembly comprises a mounting seat, a plugging ball, a driving assembly for driving the plugging ball to move towards the pipeline, and a fixing assembly for fixing the mounting seat.

[0014] The mounting seat is arranged in the interior of the rectangular shell, the plugging ball is symmetrically arranged in the interior of the mounting seat, and the mounting seat is provided with openings on both sides for the plugging ball to move outwards.

[0015] Further, the driving assembly comprises a push plate and a second spring.

[0016] The push plate is slidably arranged in the interior of the mounting seat, the second spring fixedly connects one side of the push plate away from the pipeline with the inner wall of the mounting seat, and the side of the mounting seat provided with the openings is attached to the inner wall of the rectangular shell.

[0017] Further, the fixing assembly comprises a pair of first magnets, one of which is fixed on the mounting seat and the other of which is fixed on the inner side of the rectangular shell, and the magnetic pole directions of the opposite sides of the two first magnets are oppositely arranged.

[0018] Further, the end of the pipeline connected with the rectangular shell is fixedly connected with a circular ring through an extension pipe, and the circular ring is externally provided with a protection assembly capable of preventing impurities from adhering to the end thereof.

[0019] The protection assembly comprises a rubber sheath, a first magnetic ring and a second magnetic ring.

[0020] The rubber sheath is sleeved on the outside of the circular ring, the rubber sheath is fixedly connected to the inner side of the first magnetic ring, the second magnetic ring is embedded on the inner wall of the rectangular shell, the magnetic pole directions of the opposite sides of the first magnetic ring and the second magnetic ring are opposite, the side of the mounting seat close to the first magnetic ring is made of stainless steel, and the mounting seat can be fixedly adsorbed with the first magnetic ring.

[0021] Further, the inner side of the circular ring is provided with a curved surface, and the rubber sheath does not completely enclose the circular ring.

[0022] Further, the outer side of the circular ring is attached to the inner wall of the rectangular shell, and the blocking ball can block the end of the circular ring.

[0023] Technical effects and advantages of the present application:

[0024] 1、The present application can realize two-stage blocking of the pipeline when the membrane wire breaks during the treatment of coal gas water, so that the coal gas water that is not filtered and is sucked into the membrane wire due to the breaking of the membrane wire will not enter the horizontal pipe and then the pipe rack and the horizontal pipe, thereby improving the anti-pollution effect of the pipe rack and the horizontal pipe.

[0025] 2、The present application can ensure that the end of the circular ring is free of impurities before blocking, and cooperates with the impurity-free blocking ball to better block the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structure schematic diagram of a coal gasification coal gas water purification treatment system according to an embodiment of the present application is shown;

[0027] Figure 2 A structure schematic diagram of a pipe rack and a membrane wire combination according to an embodiment of the present application is shown Figure 1 ;

[0028] Figure 3 A structure schematic diagram of a pipe rack and a membrane wire combination according to an embodiment of the present application is shown Figure 2 ;

[0029] Figure 4 An enlarged structure schematic diagram of position A in the Figure 3 according to an embodiment of the present application is shown;

[0030] Figure 5 A cross-sectional structure schematic diagram of a pipe rack and a membrane wire combination according to an embodiment of the present application is shown;

[0031] Figure 6 An enlarged structure schematic diagram of position B in the Figure 5 according to an embodiment of the present application is shown;

[0032] Figure 7 An enlarged structure schematic diagram of position C in the Figure 6 according to an embodiment of the present application is shown;

[0033] Figure 8 A structure schematic diagram of a mounting seat according to an embodiment of the present application is shown;

[0034] In the figure: 1, pretreatment pool; 2, biochemical treatment pool; 3, advanced treatment pool; 4, pipe frame; 5, cross pipe; 6, rectangular shell; 7, pipe; 8, membrane filament; 9, rectangular block; 10, sealing ring; 11, baffle; 12, first spring; 13, mounting seat; 14, plugging ball; 15, push plate; 16, second spring; 17, first magnet; 18, telescopic pipe; 19, circular ring; 20, rubber sheath; 21, first magnetic ring; 22, second magnetic ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in conjunction with the embodiments.

[0036] The present application provides a kind of coal gasification coal gas water purification treatment system, as shown in Figures 1 to 8 It includes pretreatment pool 1, one side of pretreatment pool 1 is provided with biochemical treatment pool 2, one side of biochemical treatment pool 2 is provided with advanced treatment pool 3, the inside of biochemical treatment pool 2 is equipped with pipe frame 4, the inside of pipe frame 4 is equipped with membrane filament 8, the inside of pipe frame 4 is equipped with anti-pollution component for preventing sewage from entering the inside of pipe frame 4 after the rupture of membrane filament 8;

[0037] Pretreatment pool 1 is the same as the pretreatment pool in the coal gas water treatment system of prior art, can carry out oil removal, phenol removal to coal gas water, specific principle is prior art, which will not be described here, advanced treatment pool 3 is the advanced treatment pool in the coal gas water treatment system of prior art, can carry out coagulation sedimentation, filtration and membrane separation treatment to coal gas water, further remove small particles and organic matter, soluble organic matter, heavy metal ions, ammonia nitrogen and other pollutants, specific principle is prior art, which will not be described here.

[0038] Anti-pollution component includes: cross pipe 5, rectangular shell 6, pipe 7, rectangular block 9, sealing ring 10, push component for pushing the vertical movement of rectangular block 9, plugging component for plugging pipe 7;

[0039] Cross pipe 5 is equidistantly fixedly installed in the inside of pipe frame 4, rectangular shell 6 is equidistantly fixedly installed on cross pipe 5, pipe 7 communicates rectangular shell 6 and cross pipe 5, pipe 7 is stainless steel pipe, pipe 7 is symmetrically arranged at the outside of rectangular shell 6, the end of two pipe 7 communicating with rectangular shell 6 is at the same height, rectangular block 9 is slidably arranged in the inside of rectangular shell 6, sealing ring 10 is fixedly sleeved at the outside of rectangular block 9, rectangular block 9 is fixedly sleeved at the end of membrane filament 8, the membrane hole of membrane filament 8 is located at the outside of rectangular shell 6, the width of sealing ring 10 is greater than the outer diameter of pipe 7, membrane filament 8 is the membrane filament on MBR biological membrane reactor, can carry out degradation treatment to organic matter in coal gas water.

[0040] In use, the coal gas water is deoiled and dephenolated by the pretreatment tank 1, and then enters the biochemical treatment tank 2, and is filtered through the membrane holes on the membrane filaments 8 and then is sucked into the membrane filaments 8, and then enters the horizontal pipe 5 through the rectangular shell 6 and the pipe 7, and then enters the pipe frame 4, and then enters the deep treatment tank 3 for deep treatment, and the organic matter in the coal gas water is degraded by the microorganisms on the membrane filaments 8, and the treated coal gas water is further treated in the deep treatment tank 3, and finally the coal gas water is purified.

[0041] The biochemical treatment tank 2 is provided with a pump body, the suction end of the pump body is communicated with the inside of the pipe frame 4, and the discharge end extends into the deep treatment tank 3, the coal gas water is sucked through the pump body, and then enters the rectangular shell 6 after being filtered by the membrane filaments 8, and then is sucked out through the pipe 7, the horizontal pipe 5 and the pipe frame 4, so that the coal gas water is guided to contact the membrane filaments 8 for organic matter treatment, and then the treated coal gas water is discharged into the deep treatment tank 3, the way of introducing the coal gas water from the pretreatment tank 1 into the biochemical treatment tank 2 is prior art, which will not be described here, and the pipe 7 continuously generates suction force during treatment.

[0042] If the membrane filaments 8 are broken during use, the pushing assembly pushes the rectangular block 9 with the sealing ring 10 and the broken membrane filaments 8 to move towards the horizontal pipe 5, so that the fitting plugging assembly first plugs the end of the pipe 7 for primary plugging, and finally the sealing ring 10 moves to the position where the pipe 7 is communicated with the rectangular shell 6 for secondary plugging of the end of the pipe 7, so that the coal gas water that is not filtered due to the breakage of the membrane filaments 8 and is sucked into the membrane filaments 8 cannot enter the horizontal pipe 5 and then the pipe frame 4, thereby preventing the pipe frame 4 and the horizontal pipe 5 from being polluted, and the two-stage plugging of the pipe 7 has good plugging effect and improves the anti-pollution effect of the pipe frame 4 and the horizontal pipe 5.

[0043] As shown in Figure 6 The pushing assembly comprises a baffle 11 and a first spring 12.

[0044] The baffle 11 is fixedly installed at one end of the rectangular shell 6 away from the horizontal pipe 5, specifically, the baffle 11 is fixedly connected with the rectangular shell 6 through bolts, and the first spring 12 fixedly connects the baffle 11 and the rectangular block 9, when the membrane filaments 8 are not broken, the first spring 12 is in a compressed state, and the membrane filaments 8, the rectangular block 9, the sealing ring 10, the first spring 12 and the baffle 11 form an integral whole, when the broken membrane filaments 8 need to be replaced, the baffle 11 can be disassembled and replaced as a whole.

[0045] When the membrane wire 8 is not broken, the membrane wire 8 is in a straightened state, and the two first springs 12 are in a compressed state; when the membrane wire 8 is broken, the compressed first spring 12 releases the acting force to move the rectangular block 9 and the sealing ring 10 towards the horizontal pipe 5, thereby pushing the rectangular block 9.

[0046] As shown in Figure 6 , the plugging assembly comprises a mounting seat 13, a plugging ball 14, a driving assembly for pushing the plugging ball 14 to move towards the pipeline 7, and a fixing assembly for fixing the mounting seat 13.

[0047] The mounting seat 13 is arranged inside the rectangular shell 6, the plugging ball 14 is symmetrically arranged inside the mounting seat 13, and the two sides of the mounting seat 13 are provided with openings for the plugging ball 14 to move outwards.

[0048] The mounting seat 13 is fixed in the rectangular shell 6 by the fixing assembly; when the rectangular block 9 moves towards the horizontal pipe 5, the mounting seat 13 moves along with it, so that the fixing of the mounting seat 13 is cancelled; when the mounting seat 13 moves to the position aligned with the pipe opening of the pipeline 7 with the plugging ball 14, the driving assembly pushes the plugging ball 14 to move towards the pipeline 7, so that the plugging ball 14 abuts against the end of the pipeline 7, and the plugging ball 14 is adsorbed on the end of the pipeline 7 due to the suction force generated in the pipeline 7, thereby completing the plugging of the pipeline 7.

[0049] As shown in Figure 6 , the driving assembly comprises a push plate 15 and a second spring 16.

[0050] The push plate 15 is slidingly arranged inside the mounting seat 13, the second spring 16 is fixedly connected to the inner wall of the mounting seat 13 on the side away from the pipeline 7, and the side of the mounting seat 13 provided with the opening is attached to the inner wall of the rectangular shell 6.

[0051] When the mounting seat 13 is fixed in the rectangular shell 6, the opening of the mounting seat 13 is attached to the inner wall of the rectangular shell 6, so that the plugging ball 14 is sealed in the mounting seat 13, and the plugging ball 14 can be in a clean state without impurities adhering to the surface of the plugging ball 14; when the opening of the mounting seat 13 is aligned with the port of the pipeline 7, the compressed second spring 16 releases the acting force to move the push plate 15 towards the pipeline 7, thereby pushing the plugging ball 14 to move, and finally the plugging ball 14 abuts against the end of the pipeline 7; since the plugging ball 14 is clean, there is no impurity on the surface of the plugging ball 14 to affect the close combination of the plugging ball 14 and the end of the pipeline 7, thereby ensuring the plugging effect.

[0052] As shown in Figure 6As shown, the fixing assembly is composed of a pair of first magnets 17, one of which is fixed on the mounting seat 13, and the other of which is fixed on the inner side of the rectangular shell 6, and the magnetic pole directions of the two first magnets 17 on the opposite side are arranged in opposite directions.

[0053] Through the mutual adsorption of the two first magnets 17, the mounting seat 13 is fixed in the rectangular shell 6. After the first spring 12 pushes the rectangular block 9 to abut against the mounting seat 13, the pushing force generated by the first spring 12 is enough to overcome the adsorption force between the two first magnets 17, so as to push the mounting seat 13 towards the horizontal pipe 5, at this time, the two first magnets 17 are staggered, so that the fixing of the mounting seat 13 is cancelled.

[0054] With long-term use, fine impurities will adhere to the port of the pipe 7, resulting in accumulation, which causes the subsequent plugging ball 14 to fail to abut tightly against the port of the pipe 7, affecting the plugging effect.

[0055] Therefore, as shown, Figures 6 to 7 The end of the pipe 7 connected with the rectangular shell 6 is fixedly connected with a circular ring 19 through an extension pipe 18, and the circular ring 19 is externally provided with a protection assembly capable of preventing impurities from adhering to the end thereof.

[0056] The protection assembly comprises a rubber sheath 20, a first magnetic ring 21 and a second magnetic ring 22.

[0057] The rubber sheath 20 is sleeved on the outside of the circular ring 19, the rubber sheath 20 is fixedly connected to the inner side of the first magnetic ring 21, the second magnetic ring 22 is embedded on the inner wall of the rectangular shell 6, the magnetic pole directions of the first magnetic ring 21 and the second magnetic ring 22 on the opposite side are opposite, the side of the mounting seat 13 close to the first magnetic ring 21 is made of stainless steel, and the mounting seat 13 can be adsorbed and fixed with the first magnetic ring 21.

[0058] By coating the circular ring 19 with the rubber sheath 20, impurities in the external environment cannot accumulate on the surface of the circular ring 19. When the mounting seat 13 moves towards the horizontal pipe 5, the mounting seat 13 abuts against the first magnetic ring 21 and moves with the rubber sheath 20, thereby stripping the rubber sheath 20 from the circular ring 19, so that the clean circular ring 19 is exposed. When the plugging ball 14 moves towards the pipe 7, the plugging ball 14 abuts against the circular ring 19, and then pushes the circular ring 19 to move towards the pipe 7, so that the extension pipe 18 is shortened, and then the suction force generated in the pipe 7 causes the plugging ball 14 to be adsorbed on the surface of the circular ring 19, so that the plugging ball 14 abuts tightly against the circular ring 19, thereby completing the plugging of the pipe 7, so that the above problem does not occur, affecting the plugging effect of the pipe 7, and ensuring the plugging effect of the pipe 7.

[0059] The pushing force generated by the first spring 12 can overcome the attraction force between the two first magnets 17 and the attraction force between the first magnetic ring 21 and the second magnetic ring 22, and move the mounting base 13, the first magnetic ring 21 and the second magnetic ring 22 towards the horizontal pipe 5. When the mounting base 13 moves towards the horizontal pipe 5, the mounting base 13 pushes the first magnetic ring 21 away from the second magnetic ring 22. At this time, the first magnetic ring 21 is adsorbed on the surface of the mounting base 13, so that the first magnetic ring 21 in the upper rectangular shell 6 can be located above the mounting base 13, avoiding the first magnetic ring 21 from falling through the mounting base 13 to the space between the mounting base 13 and the rectangular block 9, affecting the rectangular block 9 to reach the required position.

[0060] As shown in Figure 7 , the inner side of the circular ring 19 is provided with an arc surface, and the rubber sheath 20 does not completely enclose the circular ring 19.

[0061] As shown in Figure 7 , the outer side of the circular ring 19 is in close contact with the inner wall of the rectangular shell 6, and the blocking ball 14 can block the end of the circular ring 19.

[0062] The blocking ball 14 is a hollow stainless steel ball.

[0063] Working principle: when in use, the coal gas water is deoiled and dephenolated through the pretreatment tank 1, and then enters the biochemical treatment tank 2. After being filtered through the membrane holes on the membrane filaments 8, the coal gas water is sucked into the membrane filaments 8, and then enters the horizontal pipe 5 through the rectangular shell 6 and the pipeline 7. The horizontal pipe 5 is in communication with the channel inside the pipe support 4, and then the coal gas water enters the pipe support 4 and is introduced into the deep treatment tank 3 for deep treatment. The organic matter in the coal gas water is degraded by microorganisms on the membrane filaments 8, and the treated coal gas water is further treated in the deep treatment tank 3, and finally the coal gas water is purified.

[0064] A pump body is arranged on the biochemical treatment tank 2, the suction end of the pump body is in communication with the inside of the pipe support 4, and the discharge end extends into the deep treatment tank 3. The coal gas water is pumped through the pump body, so that the coal gas water is filtered through the membrane filaments 8 and then enters the rectangular shell 6. Then, the coal gas water is pumped out through the pipeline 7, the horizontal pipe 5 and the pipe support 4, so that the coal gas water is guided to contact the membrane filaments 8 for organic matter treatment, and then the treated coal gas water is discharged into the deep treatment tank 3. The way of introducing the coal gas water from the pretreatment tank 1 to the biochemical treatment tank 2 is a prior art, which will not be described here. During the treatment, the pipeline 7 continuously generates suction force.

[0065] When the mounting seat 13 is fixed in the rectangular shell 6, the opening of the mounting seat 13 is matched with the inner wall of the rectangular shell 6, so that the blocking ball 14 is sealed in the mounting seat 13, and the blocking ball 14 can be kept clean without impurities adhering to the surface of the blocking ball 14. If the membrane silk 8 is broken during use, the compressed first spring 12 releases the force to drive the rectangular block 9 and the sealing ring 10 to move towards the horizontal pipe 5. When the rectangular block 9 moves towards the horizontal pipe 5, the mounting seat 13 moves, so that the fixing of the mounting seat 13 is cancelled. When the mounting seat 13 moves to the position aligned with the pipe 7, the compressed second spring 16 releases the force to drive the push plate 15 to move towards the pipe 7, so that the push plate 15 drives the blocking ball 14 to move. Finally, the blocking ball 14 is in contact with the end of the pipe 7, and the suction force generated in the pipe 7 causes the blocking ball 14 to be adsorbed on the end of the pipe 7, thereby completing the first sealing of the pipe 7. Since the blocking ball 14 is clean, no impurities are on the surface of the blocking ball 14 to affect the close combination of the blocking ball 14 and the end of the pipe 7, thereby ensuring the sealing effect. Finally, the sealing ring 10 moves to the position where the pipe 7 is communicated with the rectangular shell 6, and the end of the pipe 7 is sealed by the sealing ring 10, so that the gas water that is not filtered and is sucked into the membrane silk 8 due to the breakage of the membrane silk 8 cannot enter the horizontal pipe 5, thereby preventing the pollution of the pipe rack 4 and the horizontal pipe 5. Through the two-stage sealing of the pipe 7, the sealing effect is good, and the anti-pollution effect of the pipe rack 4 and the horizontal pipe 5 is improved.

[0066] After a long time of use, small impurities may adhere to the port of the pipe 7 and accumulate, so that the subsequent blocking ball 14 cannot be in close contact with the port of the pipe 7, thereby affecting the sealing effect.

[0067] Therefore, the rubber sheath 20 is used to cover the circular ring 19, so that the impurities outside cannot accumulate on the surface of the circular ring 19. When the mounting seat 13 moves towards the horizontal pipe 5, the mounting seat 13 drives the rubber sheath 20 to move away from the circular ring 19, so that the clean circular ring 19 is exposed. When the blocking ball 14 moves towards the pipe 7, the blocking ball 14 is in contact with the circular ring 19, and then drives the circular ring 19 to move towards the pipe 7, so that the telescopic pipe 18 is shortened. Then, the suction force generated in the pipe 7 causes the blocking ball 14 to be adsorbed on the surface of the circular ring 19, so that the blocking ball 14 is in close contact with the circular ring 19, thereby completing the sealing of the pipe 7, and preventing the above problems from affecting the sealing effect of the pipe 7, thereby ensuring the sealing effect of the pipe 7.

[0068] The above examples are only used to illustrate the technical solutions of the present application, but not limit them.

Claims

1. A purification system for coal gas and water after coal gasification, comprising a pretreatment tank (1), characterized in that: A biochemical treatment tank (2) is provided on one side of the pretreatment tank (1), and a deep treatment tank (3) is provided on one side of the biochemical treatment tank (2). A pipe rack (4) is provided inside the biochemical treatment tank (2), and a membrane fiber (8) is provided inside the pipe rack (4). An anti-pollution component is provided inside the pipe rack (4) to prevent sewage from entering the pipe rack (4) after the membrane fiber (8) breaks. The anti-pollution component includes: a horizontal pipe (5), a rectangular shell (6), a pipe (7), a rectangular block (9), and a sealing ring (10). A pushing component for vertically moving the rectangular block (9), and a sealing component for sealing the pipe (7); the horizontal pipe (5) is fixedly installed at equal intervals inside the pipe rack (4), the rectangular shell (6) is fixedly installed at equal intervals on the horizontal pipe (5), the pipe (7) connects the rectangular shell (6) and the horizontal pipe (5), the rectangular block (9) is slidably disposed inside the rectangular shell (6), the sealing ring (10) is fixedly sleeved on the outside of the rectangular block (9), and the rectangular block (9) is fixedly sleeved on the end of the membrane filament (8); The pushing component includes: a baffle (11) and a first spring (12); The baffle (11) is fixedly installed at one end of the rectangular shell (6) away from the horizontal tube (5). The first spring (12) fixes the baffle (11) and the rectangular block (9) together. When the membrane filament (8) is not broken, the first spring (12) is in a compressed state. The plugging assembly includes: a mounting base (13), a plugging ball (14), a driving assembly for pushing the plugging ball (14) to move closer to the pipe (7), and a fixing assembly for fixing the mounting base (13); the mounting base (13) is disposed inside a rectangular shell (6), the plugging ball (14) is symmetrically disposed inside the mounting base (13), and the mounting base (13) has openings on both sides for the plugging ball (14) to move out of the mounting base (13); The drive assembly includes: a push plate (15) and a second spring (16); the push plate (15) is slidably disposed inside the mounting base (13), and the second spring (16) fixes the side of the push plate (15) away from the pipe (7) to the inner wall of the mounting base (13), and the side of the mounting base (13) with an opening is in contact with the inner wall of the rectangular shell (6); The fixing assembly consists of a pair of first magnets (17), one of which is fixed on the mounting base (13) and the other is fixed on the inside of the rectangular shell (6). The magnetic poles of the two first magnets (17) are arranged in opposite directions on opposite sides. One end of the pipe (7) connected to the rectangular shell (6) is fixedly connected to a ring (19) via a telescopic tube (18). The ring (19) is provided with a protective component to prevent impurities from adhering to its end. The protective component includes: a rubber sleeve (20), a first magnetic ring (21), and a second magnetic ring (22). The rubber sleeve (20) is fitted over the ring (19) and is fixedly connected to the inner side of the first magnetic ring (21). The second magnetic ring (22) is embedded in the inner wall of the rectangular shell (6). The magnetic poles of the first magnetic ring (21) and the second magnetic ring (22) are opposite in direction. The mounting base (13) is made of stainless steel on the side near the first magnetic ring (21). The mounting base (13) can be attracted and fixed to the first magnetic ring (21).

2. The coal gas-water purification system according to claim 1, characterized in that: The inner side of the ring (19) is provided with an arc surface, and the rubber sleeve (20) does not completely enclose the ring (19).

3. The coal gas-water purification system according to claim 2, characterized in that: The outer side of the ring (19) fits against the inner wall of the rectangular shell (6), and the sealing ball (14) can seal the end of the ring (19).

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