A solid-liquid separation device for salt-containing wastewater

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a solid-liquid separation device for salt-containing wastewater, comprising a waste liquid tank, an evaporation tank and a solid-liquid separation tank; a filter assembly, comprising a filter element and a first cleaning element, the filter element being arranged in the waste liquid tank, external wastewater being transported to the waste liquid tank and filtered by the filter element, the first cleaning element being arranged on the filter element, and being configured to clean the filter element when the first cleaning element moves upward; an evaporation assembly, comprising two exhaust pipes and two collecting elements, the two exhaust pipes being arranged at both sides of the top of the evaporation tank, respectively, the two collecting elements being arranged in the two exhaust pipes, respectively, for collecting condensed water in the exhaust pipes; a separation assembly, comprising a centrifugal cylinder and a second cleaning element, the centrifugal cylinder being rotatably connected in the solid-liquid separation tank, the second cleaning element being arranged in the solid-liquid separation tank and in contact with the outer wall of the centrifugal cylinder, for cleaning the drainage holes on the centrifugal cylinder. The invention has a simple structure, is convenient to operate, and greatly improves the treatment efficiency of salt-containing wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a solid-liquid separation device for saline wastewater. Background Art

[0002] Chemical companies will inevitably produce salt-containing wastewater. If this type of wastewater is discharged directly, it will lead to an increase in the mineralization of river water, causing serious pollution to the soil, surface water, and groundwater, and damaging the ecological environment. Therefore, the salt-containing wastewater needs to be treated.

[0003] In the prior art, for the solid-liquid separation treatment of saline wastewater, the saline wastewater is usually crystallized and centrifuged for solid-liquid separation. However, the waste liquid usually contains a large amount of impurities. Direct crystallization and centrifugation treatment will cause the impurities to clog the equipment, affecting the overall separation efficiency, thereby resulting in low efficiency in the treatment of saline wastewater. In addition, due to the influence of a large amount of impurities, the treatment effect is not ideal.

[0004] Therefore, there is an urgent need for a solid-liquid separation device for salt-containing wastewater to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a solid-liquid separation device for salt-containing wastewater to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a solid-liquid separation device for salt-containing wastewater, comprising:

[0007] A waste liquid tank, an evaporation tank and a solid-liquid separation tank are arranged in sequence from left to right, wherein the waste liquid tank and the solid-liquid separation tank are respectively connected to the evaporation tank through pipelines;

[0008] A filter assembly, comprising a filter element and a first cleaning element, wherein the filter element is disposed in the waste liquid tank, waste water from the outside is transported to the waste liquid tank and filtered by the filter element, and the first cleaning element is disposed on the filter element and is configured to clean the filter element when the first cleaning element moves upward;

[0009] The evaporation assembly comprises two exhaust pipes and two collecting pieces, wherein the two exhaust pipes are respectively arranged at two sides of the top of the evaporation tank, and the two collecting pieces are respectively arranged in the two exhaust pipes for collecting condensed water in the exhaust pipes;

[0010] The separation assembly includes a centrifugal cylinder and a second cleaning piece. The centrifugal cylinder is rotatably connected to the solid-liquid separation tank. The second cleaning piece is arranged in the solid-liquid separation tank and contacts the outer wall of the centrifugal cylinder for cleaning the drainage holes on the centrifugal cylinder.

[0011] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, the filter element comprises:

[0012] A filter plate, the outer wall of which is fixedly connected with a collecting groove, the filter plate is fixedly connected to the inner wall of the waste liquid tank through the collecting groove, and the filter plate is provided with a plurality of first filter holes;

[0013] A plurality of filter covers are located in the first filter holes, and a plurality of second filter holes are formed on the top of the filter covers;

[0014] The aperture of the second filter hole is smaller than the aperture of the first filter hole.

[0015] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, the cleaning component comprises:

[0016] A support rod is slidably connected in the waste liquid tank, the bottom end of the support rod passes through the middle of the filter plate and is fixedly connected to a support frame, the top end of the support frame is fixedly connected to a plurality of cleaning heads, and the cleaning heads extend into the filter cover;

[0017] A cam is fixedly connected to the output shaft of the first motor, the first motor is fixedly connected to the top of the waste liquid tank, the top of the support rod extends out of the waste liquid tank and is fixedly connected to a top plate, and the cam is arranged in contact with the top plate;

[0018] When the support rod moves upward, it drives the cleaning head to extend into the filter cover to clean the second filter holes, and the filter cover moves upward to clean the first filter holes.

[0019] A solid-liquid separation device for salt-containing wastewater provided by the present invention also includes: a sleeve, which is rotatably connected to the top of the waste liquid tank and sleeved on the support rod, the top of the sleeve is fixedly connected to a first gear, the top of the waste liquid tank is fixedly connected to a second motor, the output shaft of the second motor extends into the waste liquid tank and is fixedly connected to a second gear, the first gear is meshed with the second gear, and a cleaning plate is fixedly connected to the sleeve, and the cleaning plate is in sliding contact with the top of the filter plate.

[0020] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, the collecting element comprises:

[0021] The support frame has collecting plates fixedly connected to the top and bottom ends thereof, respectively, and the outer ring of the collecting plates is in sliding contact with the inner wall of the exhaust pipe;

[0022] A water collecting tank, fixedly connected to the top of the evaporation tank and located below the exhaust pipe, for collecting condensed water collected by the collecting plate;

[0023] An electric telescopic rod is fixedly connected to the top end of the exhaust pipe, and the telescopic end of the electric telescopic rod extends into the exhaust pipe and is fixedly connected to the support frame.

[0024] A solid-liquid separation device for salt-containing wastewater provided in the present invention also includes: a top block fixedly connected to the bottom of the inner wall of the exhaust pipe, a drainage channel is opened on the collecting plate located below, a sealing plate is hinged in the drainage channel, and the top block is used to lift the sealing plate.

[0025] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, the second cleaning component comprises:

[0026] A plurality of rotating rods are distributed along the circumferential direction and are rotatably connected in the solid-liquid separation tank, and a cleaning roller is fixedly connected to the rotating rod, and the cleaning roller is in contact with the outer wall of the centrifugal cylinder;

[0027] A third gear is fixedly connected to the outer wall of the centrifugal cylinder, a fourth gear is fixedly connected to the rotating rod, and a plurality of the fourth gears are respectively meshed with the third gears.

[0028] According to a solid-liquid separation device for salt-containing wastewater provided by the present invention, a plurality of grooves are opened at the bottom end of the filter plate, one end of a first spring is fixedly connected in the groove, a plurality of sliding rods are fixedly connected on the filter cover, and the top end of the sliding rod extends into the groove and is fixedly connected to the other end of the first spring.

[0029] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, a slide groove is opened on the inner wall of the filter cover, a slider is fixedly connected to the outer wall of the cleaning head, and the slider is slidably connected to the slide groove.

[0030] According to a salt-containing wastewater solid-liquid separation device provided by the present invention, a second spring is sleeved on the support rod, and two ends of the second spring are respectively fixedly connected to the top end of the waste liquid tank and the bottom end of the top plate.

[0031] Compared with the prior art, the present invention has the following advantages and technical effects:

[0032] The present invention provides a solid-liquid separation device for salt-containing wastewater, wherein waste liquid is transported to a waste liquid tank, and impurities are filtered by a filter element during transport. During the filtering process, the filter element is cleaned by a first cleaning element to avoid clogging of the filter element, thereby ensuring filtering efficiency and filtering effect. The filtered waste liquid is transported to an evaporation tank, evaporated by the evaporation tank, thereby increasing the internal salt concentration, and the evaporated water vapor is discharged through an exhaust pipe, and condensed water in the exhaust pipe is collected by a collecting element to avoid dripping into the waste liquid below, thereby ensuring evaporation efficiency. The evaporated waste liquid is transported to a solid-liquid separation tank, heated and crystallized by adding auxiliary materials, and its salt crystals and waste liquid are separated by a centrifugal cylinder, and the centrifugal cylinder is cleaned by a second cleaning element during the separation process, thereby ensuring solid-liquid separation efficiency. The present application has a simple structure and is easy to operate, and greatly improves the treatment efficiency of salt-containing wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the waste liquid tank of the present invention;

[0036] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle part;

[0037] Figure 4 This is a schematic diagram of the internal structure of the evaporator of the present invention;

[0038] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0039] Figure 6 For the present invention Figure 4 A partial enlarged view of point C in the middle;

[0040] Figure 7 This is a schematic diagram of the internal structure of the solid-liquid separation tank of the present invention;

[0041] Among them, 1. waste liquid tank; 2. evaporation tank; 3. solid-liquid separation tank; 4. exhaust pipe; 5. centrifugal cylinder; 6. filter plate; 7. collecting tank; 8. first filter hole; 9. filter cover; 10. second filter hole; 11. support rod; 12. support frame; 13. cleaning head; 14. cam; 15. first motor; 16. top plate; 17. sleeve; 18. first gear; 19. second motor; 20. second gear; 21. cleaning plate; 22. support frame; 23. collecting plate; 24. sump; 25. electric telescopic rod; 26. top block; 27. drainage channel; 28. sealing plate; 29. ​​rotating rod; 30. cleaning roller; 31. third gear; 32. fourth gear; 33. groove; 34. first spring; 35. slide rod; 36. slide groove; 37. slider; 38. second spring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In the relevant patent, a solid-liquid separation device for treating saline wastewater is disclosed, including a separation chamber with an open top, the separation chamber is funnel-shaped, a feed port is provided on one side of the separation chamber, a discharge port is provided at the bottom of the separation chamber, and a sealing end cover that can be opened and closed is installed at the top opening of the separation chamber, a support frame is detachably connected to the bottom of the sealing end cover, a filter bag made of PTFE material is sheathed on the support frame, and a drainage port is connected to the sealing end cover, and the drainage port is located above the bag opening of the filter bag. The above patent has a simple structure and a reasonable design. It can effectively separate solid salt from hydrochloric acid for saline wastewater treated by the common ion effect, and can realize continuous operation, effectively improving production efficiency.

[0045] In the relevant patent, a liquid-solid separation device for treating saline wastewater is disclosed, including a vertically arranged separation tank, a connecting flange is installed on the top of the separation tank, a feed port is connected to the connecting flange, a discharge port is connected to the bottom of the separation tank, a top fixing collar is provided on the top of the separation tank, a bottom fixing collar is connected to the bottom, a filter bag is externally mounted between the top fixing collar and the bottom fixing collar, the two ends of the filter bag are respectively supported and fixed by the top fixing collar and the bottom fixing collar, and the two ends of the filter bag are respectively covered at the feed port and the discharge port, and the upper and lower parts of one side of the separation tank are also respectively connected to the discharge port. The above patent has a simple structure and a reasonable design. It can effectively separate solid salt from hydrochloric acid for saline wastewater treated by the common ion effect, and can realize continuous operation, effectively improving the production efficiency.

[0046] In the above-mentioned related patents, when the salt-containing wastewater is directly treated, the impurities contained in it are likely to reduce the overall treatment efficiency and treatment effect. Therefore, this application proposes the following solutions to address the above problems:

[0047] Reference Figure 1-Figure 7 The present invention provides a solid-liquid separation device for salt-containing wastewater, comprising:

[0048] From left to right, a waste liquid tank 1, an evaporation tank 2 and a solid-liquid separation tank 3 are arranged in sequence, and the waste liquid tank 1 and the solid-liquid separation tank 3 are respectively connected to the evaporation tank 2 through pipelines;

[0049] The filter assembly includes a filter element and a first cleaning element. The filter element is disposed in the waste liquid tank 1. External waste water is transported to the waste liquid tank 1 and filtered through the filter element. The first cleaning element is disposed on the filter element and is configured to clean the filter element when the first cleaning element moves upward.

[0050] The evaporation assembly includes two exhaust pipes 4 and two collecting pieces. The two exhaust pipes 4 are respectively arranged at both sides of the top of the evaporation tank 2. The two collecting pieces are respectively arranged in the two exhaust pipes 4 to collect condensed water in the exhaust pipes 4.

[0051] The separation assembly includes a centrifugal cylinder 5 and a second cleaning piece. The centrifugal cylinder 5 is rotatably connected to the solid-liquid separation tank 3. The second cleaning piece is arranged in the solid-liquid separation tank 3 and contacts the outer wall of the centrifugal cylinder 5 for cleaning the drainage holes on the centrifugal cylinder 5.

[0052] In one embodiment of the present invention, waste liquid is transported to a waste liquid tank 1, and impurities are filtered by a filter element during transportation. During the filtering process, the filter element is cleaned by a first cleaning element to avoid clogging of the filter element, thereby ensuring filtering efficiency and filtering effect. The filtered waste liquid is transported to an evaporator 2, and evaporated by the evaporator 2 to increase the internal salt concentration. The evaporated water vapor is discharged through an exhaust pipe 4, and condensed water in the exhaust pipe 4 is collected by a collecting element to avoid dripping into the waste liquid below, thereby ensuring evaporation efficiency. The evaporated waste liquid is transported to a solid-liquid separation tank 3, and is heated and crystallized by adding auxiliary materials. The salt crystals and waste liquid are separated by a centrifugal cylinder 5, and the centrifugal cylinder 5 is cleaned by a second cleaning element during the separation process to ensure solid-liquid separation efficiency.

[0053] As an optional embodiment, the filter element includes:

[0054] The filter plate 6 has a collecting groove 7 fixedly connected to the outer wall thereof. The filter plate 6 is fixedly connected to the inner wall of the waste liquid tank 1 through the collecting groove 7. The filter plate 6 is provided with a plurality of first filtering holes 8;

[0055] A plurality of filter covers 9 are located in the first filter holes 8, and a plurality of second filter holes 10 are formed on the top of the filter covers 9;

[0056] The aperture of the second filter hole 10 is smaller than the aperture of the first filter hole 8 .

[0057] In one embodiment of the present invention, the aperture of the first filter hole 8 on the filter plate 6 is different from the aperture of the second filter hole 10, so as to achieve graded filtration and ensure the filtering effect.

[0058] As an optional embodiment, the cleaning member includes:

[0059] A support rod 11 is slidably connected in the waste liquid tank 1, the bottom end of the support rod 11 passes through the middle of the filter plate 6 and is fixedly connected to a support frame 12, and a plurality of cleaning heads 13 are fixedly connected to the top of the support frame 12, and the cleaning heads 13 extend into the filter cover 9;

[0060] The cam 14 is fixedly connected to the output shaft of the first motor 15, the first motor 15 is fixedly connected to the top of the waste liquid tank 1, the top of the support rod 11 extends out of the waste liquid tank 1 and is fixedly connected to a top plate 16, and the cam 14 is arranged in contact with the top plate 16;

[0061] When the support rod 11 moves upward, it drives the cleaning head 13 to extend into the filter cover 9 to clean the second filter hole 10, and the filter cover 9 moves upward to clean the first filter hole 8.

[0062] In one embodiment of the present invention, the support rod 11 moves vertically under the action of the cam 14. When it moves upward, it drives the cleaning head 13 to extend into the filter cover 9 to clean the second filter hole 10, and drives the entire filter cover 9 to extend into the first filter hole 8 to clean the first filter hole 8. Otherwise, the two are reset to continue filtering the waste liquid, thereby realizing the cleaning of the card-connected filter material and ensuring the overall filtering efficiency.

[0063] As an optional embodiment, it also includes: a sleeve 17, which is rotatably connected to the top of the waste liquid tank 1 and is sleeved on the support rod 11, the top of the sleeve 17 is fixedly connected to a first gear 18, the top of the waste liquid tank 1 is fixedly connected to a second motor 19, the output shaft of the second motor 19 extends into the waste liquid tank 1 and is fixedly connected to a second gear 20, the first gear 18 is meshed with the second gear 20, and a cleaning plate 21 is fixedly connected to the sleeve 17, and the cleaning plate 21 is in sliding contact with the top of the filter plate 6.

[0064] In one embodiment of the present invention, the second motor 19 is provided to drive the sleeve 17 to rotate, thereby driving the cleaning plate 21 to rotate, so as to clean the filtered matter at the top of the filter plate 6 and the filter cover 9, thereby ensuring the subsequent filtering efficiency.

[0065] As an optional implementation, the collecting member includes:

[0066] The support frame 22 has a collecting plate 23 fixedly connected to the top and bottom ends thereof, and the outer ring of the collecting plate 23 is in sliding contact with the inner wall of the exhaust pipe 4;

[0067] The water collecting tank 24 is fixedly connected to the top of the evaporation tank 2 and is located below the exhaust pipe 4, and is used to collect the condensed water collected by the collecting plate 23;

[0068] The electric telescopic rod 25 is fixedly connected to the top of the exhaust pipe 4 , and the telescopic end of the electric telescopic rod 25 extends into the exhaust pipe 4 and is fixedly connected to the support frame 22 .

[0069] In one embodiment of the present invention, the collecting plate 23 is tilted and driven by an electric telescopic rod 25 to move the collecting plate 23 vertically, so as to clean and collect the condensed water on the inner wall of the exhaust pipe 4 to prevent it from dripping into the waste liquid below again, thereby improving the overall evaporation efficiency.

[0070] Specifically, a through hole is opened in the middle of the water collecting tank 24 for water vapor to pass into the exhaust pipe 4, and an inclined tank body is provided so that the aperture of the through hole is smaller than the inner diameter of the exhaust pipe 4, so that the cleaned condensed water is collected in the water collecting tank 24 and discharged.

[0071] As an optional embodiment, it also includes: a top block 26, which is fixedly connected to the bottom of the inner wall of the exhaust pipe 4, and a drainage channel 27 is opened on the collecting plate 23 below. A sealing plate 28 is hinged in the drainage channel 27, and the top block 26 is used to lift the sealing plate 28.

[0072] In one embodiment of the present invention, the top block 26 is fixed in the exhaust pipe 4. When the collecting plate 23 moves downward, it contacts the top block 26, and the sealing plate 28 is lifted up by the top block 26, so that the condensed water between the two collecting plates 23 is discharged into the water collecting tank 24 below.

[0073] Specifically, a torsion spring (not shown) is provided at the hinge of the sealing plate 28 to ensure the opening and closing of the sealing plate 28 .

[0074] As an optional embodiment, the second cleaning member includes:

[0075] A plurality of rotating rods 29 are distributed along the circumferential direction and are rotatably connected in the solid-liquid separation tank 3. Cleaning rollers 30 are fixedly connected to the rotating rods 29. The cleaning rollers 30 are in contact with the outer wall of the centrifugal cylinder 5.

[0076] A third gear 31 is fixedly connected to the outer wall of the centrifugal cylinder 5 , a fourth gear 32 is fixedly connected to the rotating rod 29 , and a plurality of fourth gears 32 are respectively meshed with the third gears 31 .

[0077] In one embodiment of the present invention, a plurality of cleaning rollers 30 are distributed circumferentially on the outer wall of the centrifugal drum 5. Specifically, a plurality of protrusions (not shown in the figure) are provided on the cleaning rollers 30. When the cleaning rollers 30 rotate, the protrusions correspond one-to-one with the drainage holes on the centrifugal drum 5, and the salt crystals and the liquid are separated by centrifugation. During separation, the drainage holes are cleaned by the provided protrusions to prevent the salt crystals from being stuck in the drainage holes and affecting the drainage efficiency.

[0078] As an optional embodiment, a plurality of grooves 33 are opened at the bottom end of the filter plate 6, one end of the first spring 34 is fixedly connected in the groove 33, and a plurality of slide rods 35 are fixedly connected to the filter cover 9, and the top end of the slide rod 35 extends into the groove 33 and is fixedly connected to the other end of the first spring 34.

[0079] In one embodiment of the present invention, the slide rod 35 is slidably connected in the groove 33 and fixedly connected to the first spring 34, so as to ensure stable docking of the filter cover 9 and the first filter hole 8, as well as stable sliding and resetting.

[0080] As an optional implementation, a slide groove 36 is opened on the inner wall of the filter cover 9, and a slider 37 is fixedly connected to the outer wall of the cleaning head 13, and the slider 37 is slidably connected to the slide groove 36.

[0081] In one embodiment of the present invention, a slider 37 is provided in a slide groove 36. In the initial state, as the support rod 11 moves upward, the cleaning head 13 is driven to move. The slider 37 on the cleaning head 13 moves in the slide groove 36. When it moves to the top end, the second filter hole 10 is cleaned. The entire filter cover 9 is simultaneously driven upward by the slider 37 to extend into the first filter hole 8, thereby cleaning the filter material caught in the first filter hole 8.

[0082] As an optional implementation, a second spring 38 is sleeved on the support rod 11 , and two ends of the second spring 38 are fixedly connected to the top end of the waste liquid tank 1 and the bottom end of the top plate 16 respectively.

[0083] In one embodiment of the present invention, a second spring 38 is provided to ensure stable contact between the top plate 16 and the cam 14 .

[0084] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0085] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A solid-liquid separation device for salt-containing wastewater, characterized in that: include: A waste liquid tank (1), an evaporation tank (2) and a solid-liquid separation tank (3) are arranged in sequence from left to right, the waste liquid tank (1) and the solid-liquid separation tank (3) being respectively connected to the evaporation tank (2) through pipelines; a filter assembly comprising a filter element and a first cleaning element, the filter element being arranged in the waste liquid tank (1), external waste water being transported into the waste liquid tank (1) and filtered by the filter element, the first cleaning element being arranged on the filter element and being configured to clean the filter element when the first cleaning element moves upward; an evaporation assembly comprising two exhaust pipes (4) and two The collecting member is provided at two sides of the top of the evaporating tank (2), and the two collecting members are provided in the two exhaust pipes (4) for collecting condensed water in the exhaust pipes (4); the separation component comprises a centrifugal cylinder (5) and a second cleaning member, the centrifugal cylinder (5) is rotatably connected to the solid-liquid separation tank (3), the second cleaning member is provided in the solid-liquid separation tank (3) and contacts the outer wall of the centrifugal cylinder (5), and is used to clean the drainage holes on the centrifugal cylinder (5); the filter member comprises: a filter plate (6), the outer wall of which is fixedly connected to a collecting groove (7 ), the filter plate (6) is fixedly connected to the inner wall of the waste liquid tank (1) through the collecting groove (7), and a plurality of first filter holes (8) are formed on the filter plate (6); a plurality of filter covers (9) are located in the first filter holes (8), and a plurality of second filter holes (10) are formed on the top of the filter cover (9); the aperture of the second filter holes (10) is smaller than the aperture of the first filter holes (8); the cleaning part comprises: a support rod (11) slidably connected in the waste liquid tank (1), the bottom end of the support rod (11) passes through the middle of the filter plate (6) and is fixedly connected to a support frame (12), and the top of the support frame (12) is fixedly connected to A plurality of cleaning heads (13) are provided, wherein the cleaning heads (13) extend into the filter cover (9); a cam (14) is fixedly connected to the output shaft of a first motor (15); the first motor (15) is fixedly connected to the top of the waste liquid tank (1); the top of the support rod (11) extends out of the waste liquid tank (1) and is fixedly connected to a top plate (16); the cam (14) is arranged in contact with the top plate (16); wherein when the support rod (11) moves upward, the cleaning head (13) is driven to extend into the filter cover (9) to clean the second filter hole (10); and the filter cover (9) moves upward to clean the first filter hole (8).

2. A salt-containing wastewater solid-liquid separation device according to claim 1, characterized in that: Also includes: A sleeve (17) is rotatably connected to the top of the waste liquid tank (1) and sleeved on the support rod (11); a first gear (18) is fixedly connected to the top of the sleeve (17); a second motor (19) is fixedly connected to the top of the waste liquid tank (1); an output shaft of the second motor (19) extends into the waste liquid tank (1) and is fixedly connected to a second gear (20); the first gear (18) is meshed with the second gear (20); a cleaning plate (21) is fixedly connected to the sleeve (17); the cleaning plate (21) is in sliding contact with the top of the filter plate (6).

3. The solid-liquid separation device for salt-containing wastewater according to claim 1, characterized in that: The collection piece includes: The support frame (22) has a collecting plate (23) fixedly connected to the top and bottom ends thereof, respectively, and the outer ring of the collecting plate (23) is in sliding contact with the inner wall of the exhaust pipe (4); A water collecting tank (24), fixedly connected to the top of the interior of the evaporation tank (2) and located below the exhaust pipe (4), and used for collecting condensed water collected by the collecting plate (23); An electric telescopic rod (25) is fixedly connected to the top end of the exhaust pipe (4); the telescopic end of the electric telescopic rod (25) extends into the exhaust pipe (4) and is fixedly connected to the support frame (22).

4. A salt-containing wastewater solid-liquid separation device according to claim 3, characterized in that: Also includes: A top block (26) is fixedly connected to the bottom of the inner wall of the exhaust pipe (4), and a drainage channel (27) is provided on the collecting plate (23) located below. A sealing plate (28) is hinged in the drainage channel (27), and the top block (26) is used to lift up the sealing plate (28).

5. The solid-liquid separation device for salt-containing wastewater according to claim 1, characterized in that: The second cleaning member comprises: a plurality of rotating rods (29) distributed along the circumferential direction and rotatably connected in the solid-liquid separation tank (3); a cleaning roller (30) is fixedly connected to the rotating rod (29); the cleaning roller (30) is in contact with the outer wall of the centrifugal cylinder (5); A third gear (31) is fixedly connected to the outer wall of the centrifugal cylinder (5), a fourth gear (32) is fixedly connected to the rotating rod (29), and a plurality of the fourth gears (32) are respectively meshed with the third gears (31).

6. The solid-liquid separation device for salt-containing wastewater according to claim 1, characterized in that: A plurality of grooves (33) are formed at the bottom end of the filter plate (6), one end of a first spring (34) is fixedly connected in the groove (33), a plurality of slide bars (35) are fixedly connected to the filter cover (9), and the top end of the slide bar (35) extends into the groove (33) and is fixedly connected to the other end of the first spring (34).

7. The solid-liquid separation device for salt-containing wastewater according to claim 1, characterized in that: A slide groove (36) is provided on the inner wall of the filter cover (9), and a sliding block (37) is fixedly connected to the outer wall of the cleaning head (13), wherein the sliding block (37) is slidably connected to the slide groove (36).

8. The solid-liquid separation device for salt-containing wastewater according to claim 2, characterized in that: A second spring (38) is sleeved on the support rod (11), and two ends of the second spring (38) are respectively fixedly connected to the top end of the waste liquid tank (1) and the bottom end of the top plate (16).

Images