Coal water separation apparatus

Abstract

The application discloses a coal-water separation device, which comprises a base and a caterpillar belt for moving the base, wherein the base is provided with a coal-water separation tank and a water storage tank, and the coal-water separation tank and the water storage tank are communicated through a drain pipe; a filter plate capable of floating is arranged in the coal-water separation tank, a V-shaped receiving plate is arranged below the filter plate, a filter core for secondary separation is arranged below the receiving plate, water separated in the coal-water separation tank flows into the water storage tank through the drain pipe, a coal discharging baffle is arranged on one side of the coal-water separation tank, and the coal discharging baffle is locked through a limiting lock rod; the coal-water separation device can realize coal-water separation and slag-water separation, can separate water from coal to a larger extent, and can collect the separated coal, slag and water, and is suitable for promotion and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of separation equipment, in particular to a coal-water separation equipment. BACKGROUND

[0002] In the coal mine working shaft, the internal water is mainly generated in two ways: one is that in the mining process, it is often necessary to drill the underground gas and the underground water content, and water is usually injected at the drill bit during drilling to reduce the friction temperature; two is that in the drilling process, underground water will gush out; at this time, the drilling water injection and the underground gushing water will be directly discharged to the roadway, which will cause the coal blocks to be mixed with water to different degrees; and in order to separate the coal blocks and recycle the water, it is usually necessary to separate them.

[0003] The invention patent with publication number CN116425290A discloses a tracked multi-stage coal-water separation integrated device, which comprises: a support assembly, a tracked is installed below the support assembly; a gas-slag separation tank assembly is used to adsorb coal water at the drill bit of the drilling machine, and can absorb the gas phase generated by the coal water; a primary filter assembly is connected with the gas-slag separation tank assembly, can receive the liquid phase obtained by the gas-slag separation tank assembly, and separate the larger particles in the liquid phase; a secondary filter assembly is connected with the primary filter assembly, can receive the liquid phase filtered by the primary filter assembly, and separate the smaller particles in the received liquid phase.

[0004] However, although the above-mentioned device can realize multi-stage filtration, in actual use, the coal-water separation is not complete, and the coal-water also includes coal slag, which not only easily blocks the filter holes during the separation process, but also is not conducive to collection and cleaning; therefore, there is an urgent need for a separation equipment that can separate coal blocks and coal slag. SUMMARY

[0005] The purpose of the present application is to solve the above-mentioned problems and provide a coal-water separation equipment that can realize coal-water separation and slag-water separation, more greatly separate water from coal, and collect coal, slag and water after separation.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is: a coal-water separation equipment, comprising a base and a tracked belt for moving the base, a coal-water separation tank and a water storage tank are arranged on the base, and the coal-water separation tank and the water storage tank are connected through a drain pipe; a filter plate capable of floating is arranged in the coal-water separation tank, a V-shaped receiving plate is arranged below the filter plate, and a filter core for secondary separation is arranged below the receiving plate; the water separated in the coal-water separation tank flows into the water storage tank through the drain pipe; a coal discharge baffle is arranged on one side of the coal-water separation tank, and the coal discharge baffle is locked by a limiting lock rod.

[0007] Preferably, the filter plate comprises a plurality of hingedly connected movable plates, the movable plates are provided with drainage holes, the two outermost movable plates are each fixed with a through shaft, the end of the through shaft is provided with a fixed column, the circumference of the fixed column is provided with a flat surface, the flat surface is fixed with a tension spring, the other end of the tension spring is fixed to the side wall of the coal-water separation tank; the lower side of the filter plate is provided with a push column capable of pushing the movable plate, the push column can move along the length direction of the filter plate, and the corresponding movable plate is raised upward when the push column passes.

[0008] Preferably, the inner walls of the two sides of the coal-water separation tank are each provided with a groove, and the filter plate is arranged between the two grooves; the lower side of the groove is provided with a sliding groove, the sliding groove is provided with a reciprocating sliding block, and the two ends of the push column are each integrally provided with an extension column, and the end of the extension column is fixedly connected with the sliding block.

[0009] Preferably, the coal-water separation tank is provided with two groups of first stepping motors that operate synchronously on the side close to the water storage tank, the output end of the first stepping motor extends into the coal-water separation tank and is in transmission connection with a lead screw, and the lead screw is in rotary connection with the inner wall of the coal-water separation tank through the extension column; the push column reciprocates along the sliding groove when the two groups of first stepping motors operate, and the raised position of the movable plate changes as the push column moves.

[0010] Preferably, the middle of the receiving plate is provided with a plurality of drainage holes, and the lower side of the drainage hole is correspondingly provided with a filter core, wherein the inner diameter of the filter core is greater than the outer diameter of the drainage hole, the bottom of the filter core is fixedly connected with the air injection pipe and is provided with a first filter hole on the outer wall, one end of the air injection pipe is in rotary connection with the inner wall of the coal-water separation tank, the other end extends outward and is provided with a rotary joint, the air injection pipe is connected with the air pump through the rotary joint, the outer circumference of the air injection pipe is fixedly provided with a gear disc, the gear disc is matched with a transmission gear, the outer side of the transmission gear is provided with a second stepping motor, the second stepping motor drives the air injection pipe to rotate in the coal-water separation tank after operation, and the filter core tilts and turns to one side when the air injection pipe rotates.

[0011] Preferably, the inner bottom surface of the coal-water separation tank is further provided with a partition plate, the partition plate is provided with a plurality of arc-shaped grooves, one-to-one corresponding to the partition plate, the filter core tilts and turns to one side of the partition plate to discharge slag after the second stepping motor operates, and the outer side of the coal-water separation tank is provided with a slag discharge plate.

[0012] Preferably, the bottom of the filter core is provided with a limiting step, and the outside is provided with a backflush filter cartridge, the two ends of the backflush filter cartridge are each provided with an inward turning plate, one of the inward turning plates is overlapped on the top of the filter core, and the other end is sleeved on the limiting step, and the backflush filter cartridge can move up and down outside the filter core.

[0013] Preferably, the backflush filter cartridge is provided with a backflush cavity, and a plurality of filter tubes are arranged in the backflush cavity; the filter core is in a vertical state, and the filter tubes correspond to the first filter holes one by one; the inner wall of the backflush filter cartridge is provided with a backflush hole, and the backflush hole is communicated with the backflush cavity.

[0014] Preferably, the backflush filter cartridge is provided with a backflush cavity, and a plurality of filter tubes are arranged in the backflush cavity; the filter core is in a vertical state, and the filter tubes correspond to the first filter holes one by one; the inner wall of the backflush filter cartridge is provided with a backflush hole, and the backflush hole is communicated with the backflush cavity.

[0015] Preferably, the bottom of the backflush filter cartridge is provided with a plurality of communication pipes.

[0016] Compared with the prior art, the coal-water separation device has the following beneficial effects:

[0017] 1. The primary separation can realize the preliminary separation of coal and water; in addition, through the reciprocating movement of the pushing column, the raised part of the filter plate will change with the movement of the pushing column, so that the coal blocks above the filter plate are gradually disturbed, and the accumulated water can also be separated from the coal body after the disturbance;

[0018] 2. The secondary separation is realized through the filter core, the slag-water mixture after the primary filtration can be further separated, so that the coal slag and water are separated, and the separated water and coal slag can be collected;

[0019] 3. The backflush filter cartridge which can slide is arranged outside the filter core, and the two kinds of cooperation states of the backflush filter cartridge and the filter core are used to realize the discharge of the separated water and the interception of the coal slag; when the filter core is vertical, the slag-water separation in the filter core is realized, so that the separated water flows out along the filter tube; when the filter core is inclined, air is blown into the inside from the backflush hole and the first filter hole, so as to clean the coal slag in the first filter hole, avoid the blockage of the separated water flow, and facilitate the pouring of the coal slag after the cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the coal-water separation device of the present application Figure 1 .

[0021] Figure 2 It is an overall schematic diagram of the coal-water separation device of the present application Figure 2 .

[0022] Figure 3 It is a structural schematic diagram of the coal-water separation box in the coal-water separation device of the present application.

[0023] Figure 4 It is a structural schematic diagram of the filter plate in the coal-water separation device of the present application.

[0024] Figure 5 It is an enlarged structural schematic diagram of the position A in the present application Figure 4 .

[0025] Figure 6Variation diagram of the raised part of the filter plate in the coal-water separation device of the present application.

[0026] Figure 7 Internal structure diagram of the coal-water separation tank in the coal-water separation device of the present application Figure 1 .

[0027] Figure 8 Internal structure diagram of the coal-water separation tank in the coal-water separation device of the present application Figure 2 .

[0028] Figure 9 Enlarged structure diagram of B in the present application Figure 8 .

[0029] Figure 10 Internal structure diagram of the coal-water separation tank in the coal-water separation device of the present application Figure 3 .

[0030] Figure 11 Enlarged structure diagram of C in the present application Figure 10 .

[0031] Figure 12 Structure diagram of the filter core overturning slag discharge in the present application

[0032] Figure 13 Cooperation diagram of the filter core and the backflush filter cylinder in the coal-water separation device of the present application Figure 1 .

[0033] Figure 14 Cooperation diagram of the filter core and the backflush filter cylinder in the coal-water separation device of the present application Figure 2 .

[0034] Figure 15 Separation diagram of the filter core and the backflush filter cylinder in the coal-water separation device of the present application

[0035] Figure 16 Internal structure diagram of the backflush filter cylinder in the present application

[0036] Figure 17 Enlarged structure diagram of D in the present application Figure 16 .

[0037] Figure 18 Flow direction diagram of the separated water in the present application

[0038] Figure 19 Air flow direction and slag discharge diagram in the present application

[0039] In the figure: 1, track; 2, base; 3, coal-water separation tank; 31, drain pipe; 32, first stepper motor; 33, receiving plate; 34, drainage hole; 35, filter element; 351, first filter hole; 352, limiting step; 353, backflushing filter cartridge; 3531, inner turning plate; 3532, backflushing cavity; 3533, communication pipe; 3534, backflushing hole; 3535, filter pipe; 36, gas injection pipe; 361, rotary joint; 362, air pump; 363, second stepper motor; 37, partition plate; 38, arc-shaped groove; 39, groove; 310, sliding groove; 4, filter plate; 41, movable plate; 42, draining hole; 43, through shaft; 44, fixed column; 45, plane; 46, tension spring; 47, push column; 471, extension column; 472, sliding block; 473, lead screw; 5, coal discharging baffle; 6, slag discharging plate; 7, limiting lock rod; 8, water storage tank. DETAILED DESCRIPTION

[0040] The application will now be described in further detail with reference to the drawings. The drawings are simplified schematic views which only schematically illustrate the basic structure of the application, and thus only show the components relevant to the application.

[0041] Please refer to Figures 1-3 , the coal-water separation device includes a base 2 and a track 1 for moving the base 2, which can move the whole device through the track 1 whether in the well or outside the well, the base 2 is provided with a coal-water separation tank 3 and a water storage tank 8, the coal-water separation tank 3 is used for separating coal and water, and the water storage tank 8 is used for collecting separated water, wherein the coal-water separation tank 3 and the water storage tank 8 are communicated through a drain pipe 31; the coal-water separation tank 3 is provided with a filter plate 4 capable of floating, the lower part of the filter plate 4 is provided with a V-shaped receiving plate 33, the lower part of the receiving plate 33 is provided with a filter element 35 for secondary separation, the separated water in the coal-water separation tank 3 flows into the water storage tank 8 through the drain pipe 31, one side of the coal-water separation tank 3 is provided with a coal discharging baffle 5, and the coal discharging baffle 5 is locked by a limiting lock rod 7.

[0042] In use, the coal-water solid-liquid mixture is injected into the coal-water separation tank 3 together, and first separated by the filter plate 4 after entering; the filtered coal blocks stay on the filter plate 4, and finally the coal blocks are discharged after the coal discharging baffle 5 is opened; wherein the coal discharging mode can be manual or using tools.

[0043] After the first separation, the separated water and part of the coal residue fall onto the receiving plate 33 below; since the receiving plate 33 is V-shaped, it can better collect the residue water (coal residue and separated water), and after collection, it enters the corresponding filter element 35 to realize secondary separation, after the residue water enters the filter element 35, the separated water passes through the filter element 35 to the bottom of the coal-water separation tank 3, and the coal residue stays in the filter element 35; the separated water after two times of filtration finally enters the water storage tank 8 through the drain pipe 31.

[0044] It can be understood that, in order to facilitate the separation of water into the water storage tank 8, a pump can also be arranged in the water storage tank 8 for pumping the separated water; after the separated water is stored in the water storage tank 8, it can be used for dust reduction, cleaning, etc., which can save water source and is more convenient.

[0045] Please refer to Figures 4-6 In the embodiment, the filter plate 4 comprises a plurality of hingedly connected movable plates 41, the movable plates 41 are provided with drain holes 42, the outermost two movable plates 41 are fixedly provided with penetrating shafts 43, the end portions of the penetrating shafts 43 are provided with fixed columns 44, the circumferences of the fixed columns 44 are provided with planes 45, the planes 45 are fixedly provided with tension springs 46, and the other ends of the tension springs 46 are fixed to the side walls of the coal-water separation tank 3.

[0046] That is to say, the filter plate 4 in the static state can realize one-time separation, at this time, the coal blocks stay on the filter plate 4, and the slag water penetrates through the drain holes 42 into the receiving plate 33.

[0047] Since the coal blocks are irregular in shape, the water liquid is prone to be accumulated in the pits and depressions on the surface in the static state; in order to realize the coal-water separation to a greater extent, the coal blocks on the filter plate 4 are vibrated to rise, which can effectively make the accumulated water liquid drain out.

[0048] Specifically, the lower portion of the filter plate 4 is provided with a pushing column 47 capable of pushing the movable plates 41, the pushing column 47 is capable of reciprocating along the length direction of the filter plate 4, and the corresponding movable plates 41 rise upward when the pushing column 47 passes.

[0049] Please refer to Figure 6 In the normal state, the pushing column 47 is static, and the corresponding movable plates 41 rise when static; when the pushing column 47 reciprocates, the rising position will change with the movement of the pushing column 47; at this time, the coal blocks above the filter plate 4 will be gradually disturbed, and the accumulated water liquid is also separated through the drain holes 42 after the disturbance.

[0050] After the movable plates 41 rise, the movable plates 41 on the two sides will pull the corresponding tension springs to supplement the overall length, so as to avoid the force interference.

[0051] Please refer to Figures 7-11 In order to realize the placement of the filter plate 4 and the movement of the pushing column 47, the inner walls of the two sides of the coal-water separation tank 3 are provided with grooves 39, the filter plate 4 is wholly arranged between the two grooves 39; the lower portion of the groove 39 is provided with a sliding groove 310, the sliding groove 310 is provided with a sliding block 472 capable of reciprocating, the two ends of the pushing column 47 are integrally provided with extension columns 471, and the end portions of the extension columns 471 are fixedly connected with the sliding block 472.

[0052] In addition, the coal water separation tank 3 is provided with two groups of first stepping motors 32 on the side close to the water storage tank 8, the output end of the first stepping motor 32 extends into the coal water separation tank 3 and is in transmission connection with the lead screw 473, the lead screw 473 is in rotation connection with the other opposite inner wall of the coal water separation tank 3 through the extension column 471; when the two groups of first stepping motors 32 operate, the push column 47 moves back and forth along the sliding groove 310, and when the push column 47 moves, the raised part of the movable plate 41 changes.

[0053] That is, the push column 47 can move back and forth along the sliding groove 310 through the sliding blocks 472 at both ends; at the same time, the lead screw 473 passes through the extension column 471 through thread cooperation, and when the external first stepping motor 32 operates, the push column 47 pushes the movable plate 41 and can move at the same time, so that the whole movable plate 41 gradually rises and disturbs the coal blocks above.

[0054] Further, the middle of the receiving plate 33 is provided with a plurality of drainage holes 34, and the lower side of the drainage hole 34 is provided with a filter core 35 in correspondence, wherein the inner diameter of the filter core 35 is greater than the outer diameter of the drainage hole 34, the bottom of the filter core 35 is in communication and fixed with the gas injection pipe 36, and the outer wall is provided with a first filter hole 351, one end of the gas injection pipe 36 is in rotation connection with the inner wall of the coal water separation tank 3, the other end extends outward and is provided with a rotary joint 361, the gas injection pipe 36 is connected with the air pump 362 through the rotary joint 361; the outer side of the gas injection pipe 36 is fixed with a gear disc, the gear disc is matched with a transmission gear, and the outer side of the transmission gear is provided with a second stepping motor 363; as shown in the figure, the second stepping motor 363 drives the gas injection pipe 36 to rotate in the coal water separation tank 3 after operation, and the filter core 35 tilts and turns to one side when the gas injection pipe 36 rotates, so that the coal residue in the filter core 35 is poured out. Figure 12

[0055] In this embodiment, the purpose of secondary separation is to remove the coal residue carried in the separated water, so as to avoid the coal residue from blocking the first filter hole and affecting the discharge of the separated water, therefore the inner diameter of the first filter hole 351 on the filter core 35 is smaller than the water draining hole 42 on the movable plate 41.

[0056] In order to distinguish the coal residue from the separated water in the coal water separation tank 3, a partition plate 37 is further arranged on the inner bottom surface of the coal water separation tank 3, a plurality of arc-shaped grooves 38 are arranged on the partition plate 37, the arc-shaped groove 38 corresponds to the partition plate 37 one by one, the filter core 35 is turned to one side of the partition plate 37 to discharge the residue after the second stepping motor 363 operates, so that the internal coal residue enters the other side of the partition plate 37, avoiding mixing with the separated water, and the outer side of the coal water separation tank 3 is provided with a residue discharging plate 6; after a period of residue discharging, the residue discharging plate 6 is opened, and the residue is cleaned by an external scraping plate tool.

[0057] ​Although the filter core 35 can be turned over to discharge the slag, part of the coal slag will adhere to the inner wall, and simple turning cannot completely discharge the slag; in order to improve the slag discharge efficiency, the external air pump 362 is started, at this time air enters the corresponding filter core 35 through the air injection pipe 36, and the coal slag on the inner wall is blown to improve the slag discharge efficiency.

[0058] However, in actual use, the air injected by the air injection pipe 36 will be discharged in large quantities from the end port, and the air loss will seriously affect the cleaning of the coal slag.

[0059] In order to efficiently clean the coal slag in the first filter hole 351, a backflush filter cylinder 353 is arranged outside the filter core 35; for details, refer to Figures 13-17 .

[0060] A limiting step 352 is arranged at the bottom of the filter core 35, and a backflush filter cylinder 353 is arranged outside; both ends of the backflush filter cylinder 353 are provided with an inner turning plate 3531 for limiting, one of which is overlapped on the top of the filter core 35, and the other end is sleeved on the limiting step 352, and the backflush filter cylinder 353 can move up and down outside the filter core 35.

[0061] Since the backflush filter cylinder 353 can move up and down outside the filter core 35, the backflush filter cylinder 353 and the filter core 35 have two cooperation states:

[0062] One is that the filter core 35 is vertical, at this time the upper inner turning plate 3531 is overlapped on the top of the filter core 35, and the lower inner turning plate 3531 is arranged around the limiting step 352;

[0063] The second is that the filter core 35 is turned over and inclined through the air injection pipe 36, after being inclined, the backflush filter cylinder 353 slides due to its own gravity, at this time the upper inner turning plate 3531 does not contact the top of the filter core 35, and the lower inner turning plate 3531 contacts the limiting step 352;

[0064] The two states meet different use scenarios; the vertical state is used for separating coal slag, and the inclined state is used for backflushing and cleaning coal slag.

[0065] It can be understood that, due to the arrangement of the inner turning plates 3531 at both ends, the backflush filter cylinder 353 can be prevented from separating from the filter core 35.

[0066] Specifically, the backflush filter cylinder 353 is provided with a backflush cavity 3532, a plurality of filter pipes 3535 are arranged in the backflush cavity 3532, the filter pipes 3535 correspond to the first filter holes 351 one by one in the vertical state of the filter core 35, at this time the separated water flows out through the first filter holes 351 and the filter pipes 3535; the inner wall of the backflush filter cylinder 353 is provided with a backflush hole 3534, and the backflush hole 3534 communicates with the backflush cavity 3532.

[0067] In addition, the bottom of the backflush filter cylinder 353 is provided with a plurality of communication pipes 3533, which are in communication with the air injection pipe 36 below and are used to inject air into the backflush cavity 3532, wherein the communication pipes 3533 are flexible expansion pipes.

[0068] That is, during secondary separation, the filter core 35 is vertical, the filter pipes 3535 correspond to the first filter holes 351 one by one, at this time, the separated water flows out through the first filter holes 351 and the filter pipes 3535;

[0069] When backflushing the coal residue, the filter core 35 is turned over, after turning over, the backflush filter cylinder 353 moves downward by its own gravity, after moving, the filter pipes 3535 are misaligned with the first filter holes 351, at this time, due to the movement of the backflush filter cylinder 353, the backflush holes 3534 correspond to the first filter holes 351 one by one;

[0070] After starting the external air pump 362, air enters the corresponding communication pipes 3533 through the air injection pipe 36, and finally the air enters the backflush cavity 3532 through the communication pipes 3533, at this time, due to the correspondence between the internal backflush holes 3534 and the first filter holes 351, the blowing flow of the air will blow out the coal residue in the first filter holes 351, so that it falls into the filter core 35, so as to prevent the coal residue from blocking the first filter holes 351 and affecting the outflow of the separated water; and the blown-out coal residue is also convenient for being turned over and poured into the other side of the partition plate 37.

[0071] When the filter core 35 is vertical, the outflow of the separated water is as shown in Figure 18 , which satisfies the separation of the residue and water in the filter core 35, so that the separated water flows out along the filter pipes 3535; when the filter core is inclined, as shown in Figure 19 , air will be blown into the inside from the backflush holes 3534 and the first filter holes 351, so as to clean the coal residue in the first filter holes 351, avoid blocking the outflow of the separated water, and facilitate pouring out of the coal residue after cleaning.

[0072] In order to ensure the linear sliding of the backflush filter cylinder 353 and avoid the rotation of the backflush filter cylinder 353 itself, a strip-shaped limiting groove is arranged on the inner wall of the backflush filter cylinder 353, and a limiting sliding block matched with the strip-shaped limiting groove is arranged outside the filter core 35; at this time, when the filter core 35 is turned over, the backflush filter cylinder 353 can slide linearly along the strip-shaped limiting groove, so as to ensure the correspondence between the backflush holes 3534 and the first filter holes 351, so as to accurately clean the coal residue in the first filter holes.

[0073] Obviously, the above embodiments are only examples for clearly illustrating, but not limit the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. Coal water separation apparatus, characterized in that, The utility model provides a coal water separation tank and water storage tank are communicated through the drain pipe, the filter plate of floating is equipped in the coal water separation tank, the lower side of filter plate is equipped with the V type of receiving plate, the lower side of receiving plate is equipped with the filter core for secondary separation, and the water of separation in the coal water separation tank flows into the water storage tank through the drain pipe, one side of the coal water separation tank is equipped with the coal discharging baffle, and the coal discharging baffle is locked through the limiting lock bar, The filter plate includes a plurality of hingedly connected movable plates, the movable plates are provided with drain holes, the outermost two movable plates are each fixedly provided with a penetrating shaft, the end of the penetrating shaft is provided with a fixed column, the circumference of the fixed column is provided with a flat surface, a tension spring is fixed to the flat surface, and the other end of the tension spring is fixed to the side wall of the coal water separation tank, the lower side of the filter plate is provided with a push column capable of pushing the movable plates, the push column is movable along the length direction of the filter plate, and the corresponding movable plate is raised upward when the push column passes. The bottom of the filter core is provided with a limiting step, and the outside is provided with a backflushing filter cylinder, the outer wall of the filter core is provided with a first filter hole, both ends of the backflushing filter cylinder are provided with an inner turning plate, one of the inner turning plates is overlapped on the top of the filter core, and the other end is overlapped on the limiting step, and the backflushing filter cylinder is movable up and down outside the filter core. The backflushing filter cylinder is provided with a backflushing cavity, a plurality of filter tubes are arranged in the backflushing cavity, and the filter tubes correspond to the first filter holes one by one in the vertical state of the filter core, the inner wall of the backflushing filter cylinder is provided with a backflushing hole, and the backflushing hole is communicated with the backflushing cavity. After the filter core is turned over, the backflushing filter cylinder is moved downward by gravity, the filter tubes are misaligned with the first filter holes after the movement, and the backflushing hole corresponds to the first filter hole one by one.

2. The coal water separation apparatus according to claim 1, characterized by, The inner walls of both sides of the coal water separation tank are each provided with a groove, the filter plate is arranged between the two grooves, the lower side of the groove is provided with a sliding groove, the sliding groove is provided with a sliding block movable back and forth, both ends of the push column are integrally provided with an extension column, and the end of the extension column is fixedly connected with the sliding block.

3. The coal water separation apparatus according to claim 2, characterized by, The coal water separation tank is provided with two groups of first stepping motors operating synchronously on the side close to the water storage tank, the output end of the first stepping motor extends into the coal water separation tank and is in transmission connection with a lead screw, the lead screw is in rotary connection with the inner wall of the coal water separation tank through the extension column, the push column moves back and forth along the sliding groove when the two groups of first stepping motors operate, and the raised position of the movable plate changes with the movement of the push column.

4. The coal water separation apparatus according to claim 1, characterized by, The middle of the receiving plate is provided with a plurality of drainage holes, the lower side of the drainage hole is provided with a filter core in correspondence, the inner diameter of the filter core is greater than the outer diameter of the drainage hole, the bottom of the filter core is fixedly connected with an air injection pipe, one end of the air injection pipe is in rotary connection with the inner wall of the coal water separation tank, the other end extends outward and is provided with a rotary joint, the air injection pipe is connected with an air pump through the rotary joint, the outer circumference of the air injection pipe is fixedly provided with a toothed disc, the toothed disc is matched with a transmission gear, the outer side of the transmission gear is provided with a second stepping motor, the air injection pipe rotates in the coal water separation tank after the second stepping motor operates, and the filter core tilts and turns to one side when the air injection pipe rotates.

5. The coal water separation apparatus according to claim 4, characterized by The inner bottom surface of the coal-water separation tank is further provided with a partition plate, a plurality of arc-shaped grooves are arranged on the partition plate, the arc-shaped grooves correspond to the filter elements one by one, the filter elements are turned to one side of the partition plate to discharge the slag after the second stepping motor operates, and the coal-water separation tank is provided with a slag discharge plate on the outside.

6. The coal water separation apparatus according to claim 1, characterized by, The bottom of the backflushing filter cylinder is provided with a plurality of communication pipes.

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