Coal chemical wastewater treatment device and working method thereof

Abstract

The invention discloses a coal chemical industry wastewater treatment device and a working method thereof in the technical field of coal chemical industry wastewater treatment. The coal chemical industry wastewater treatment device comprises a tank body, the side wall of the tank body communicates with a water inlet pipe and a water outlet pipe, a blow-off pipe is arranged at the bottom of the tank body, a screen and a mounting ring are arranged in the tank body, and the mounting ring and the screen are arranged in a sliding mode; the upper support is arranged at the top of the mounting ring, and the lower support is located below the screen; the cleaning spring is arranged between the lower support and the mounting ring; the upper limiting piece is used for limiting the lower support; the triggering piece is used for releasing the limiting of the upper limiting piece on the lower support; the movable plate is arranged at the bottom of the mounting ring and used for preventing the triggering piece from descending; the lifting structure is used for driving the mounting ring to lift; the upper support and the lower support are used for supporting the upper portion and the lower portion of the screen respectively, deformation or damage of the screen is avoided, meanwhile, meshes are cleaned through filtered water, the screen vibrates through impact of the lower support, and impurities adhering to the lower surface of the screen are cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of coal chemical wastewater treatment, and in particular to a coal chemical wastewater treatment device and a working method thereof. Background Art

[0002] Coal chemical wastewater mainly comes from the production processes of coking, coal gasification, coal liquefaction, etc., and has the characteristics of complex water quality, multiple types of pollutants, and high concentrations. The wastewater contains high concentrations of toxic and harmful substances such as ammonia nitrogen, phenols, cyanides, sulfides, benzene series, polycyclic aromatic hydrocarbons and heterocyclic compounds, as well as a large amount of suspended matter, oil substances and soluble solids.

[0003] The coal chemical wastewater treatment process usually includes four main stages: pretreatment, biochemical treatment, deep treatment and zero emission treatment. During the pretreatment process, large particles and solid particles in the wastewater need to be removed through a screen.

[0004] Existing wastewater treatment devices require regular cleaning of the mesh of the screen, and the process of cleaning the mesh is long, which reduces the efficiency of wastewater treatment. In addition, since the wastewater treatment device lacks protection for the screen and is only supported by the fastening ring of the outer ring, the excessive wastewater flow rate can easily cause the screen to bend or even be damaged, which will further reduce the efficiency of wastewater treatment. Summary of the invention

[0005] The technical problem of the present invention is to provide a coal chemical wastewater treatment device and a working method thereof, wherein the screen is supported up and down by upper and lower supports respectively to prevent the screen from being deformed or damaged. At the same time, the mesh is cleaned by filtered water, and the screen is vibrated by impact through the lower support to clean impurities adhered to its lower surface.

[0006] To achieve the above object, the present invention provides the following technical solution: a coal chemical wastewater treatment device, comprising a tank body, the side wall of the tank body is connected with an inlet pipe and an outlet pipe, the bottom of the tank body is provided with a sewage pipe, and a screen is provided in the tank body.

[0007] A mounting ring is slidably arranged with the screen and is slidably arranged in the tank body;

[0008] An upper support and a lower support, wherein the upper support is arranged on the top of the mounting ring, the lower support is slidably arranged in the mounting ring, and the lower support is located below the screen;

[0009] A cleaning spring is arranged between the lower support and the mounting ring;

[0010] An upper limit member is arranged in the mounting ring and is used to limit the lower support;

[0011] A triggering member, used to release the limit of the lower support by the upper limit member;

[0012] A movable plate, arranged at the bottom of the mounting ring, used to prevent the triggering member from descending;

[0013] The lifting structure is used to drive the mounting ring to rise and fall.

[0014] As a further solution of the present invention, the upper limit member includes:

[0015] A limiting rod is fixed at the bottom of the mounting ring;

[0016] The limit head is fixed on the top of the limit rod and is provided with a groove;

[0017] The connecting piece is fixedly arranged on the lower supporting side wall and is slidably arranged with the mounting ring;

[0018] A limit slider is slidably arranged in the connecting piece and has a rounded corner at the bottom;

[0019] The limit spring is installed between the connecting piece and the limit slider.

[0020] As a further solution of the present invention, the triggering member includes:

[0021] The trigger rod is slidably arranged with the limit rod, and the bottom thereof passes through the mounting ring; the trigger spring is arranged between the trigger rod and the limit rod;

[0022] The trigger head is fixed on the top of the trigger rod, and chamfers are arranged on both sides.

[0023] As a further solution of the present invention, a quick-release structure is installed between the lifting structure and the upper support, the side wall of the tank body is provided with an inspection port, and the inspection port is provided with a side plate; the quick-release structure includes:

[0024] A quick-release ring is fixedly mounted on the top of the upper support, and a mounting groove is provided on the side wall of the mounting ring;

[0025] A card plate is slidably disposed in the quick-release ring and installed at the bottom of the lifting structure;

[0026] Spring plate, installed in the quick release ring.

[0027] As a further solution of the present invention, a fixed guide rail is provided in the tank body and is slidably arranged with the mounting ring, a movable guide rail is installed in the side plate, a limit ring is slidably arranged in the tank body, a lifting spring is fixed between the limit ring and the tank body, a limit protrusion is fixed at the bottom of the limit ring, and the limit protrusion limits the outward movement of the side plate through the movable guide rail.

[0028] As a further solution of the present invention, a protective ring is slidingly provided on the outer wall of the tank body, positioning rings are provided on the upper and lower sides of the protective ring, and a bayonet pin cooperating with the positioning ring is fixed on the side wall of the tank body. There are at least two bayonet pins which are respectively located on the upper and lower sides of the protective ring.

[0029] As a further solution of the present invention, a buckle that can be engaged with a mounting ring is installed on the upper surface of the movable plate, the movable plate is provided with a sewage outlet, a baffle is slidably provided on the sewage outlet, a return spring is installed between the movable plate and the baffle, and a slope is provided on the upper surface of the movable plate.

[0030] A working method of a coal chemical wastewater treatment device, the specific steps are as follows:

[0031] Step 1: Inject wastewater into the tank through the water inlet pipe. Large impurities in the wastewater fall to the bottom of the tank. The screen filters the wastewater. The upper support supports the top of the screen. The filtered water is discharged from the outlet pipe.

[0032] Step 2: When cleaning the screen, the drive mounting ring rises, the blocked screen squeezes the lower support, the upper limit piece limits the lower support, the screen rises, the lower support supports the bottom of the screen, the water on the top of the tank is squeezed through the mesh of the screen, and the impurities in the mesh are squeezed out, completing the cleaning of the mesh;

[0033] Step 3: The drive mounting ring is lowered, and the movable plate releases the limit of the upper limit part on the lower support through the trigger part. The cleaning spring quickly bounces the lower support, and the lower support hits the screen and supports the bottom of the screen. The screen rises rapidly under the impact, and the impurities adhered to the bottom of the screen are separated from the screen, completing the cleaning of the impurities at the bottom of the screen;

[0034] Step 4: At the same time, the lower support presses the baffle down to block the sewage outlet, the buckle is connected to the installation ring, the water outlet pipe is opened, the installation ring is driven to rise, the movable plate lifts the water in the tank upward, and the water is discharged from the water outlet pipe;

[0035] Step 5: Close the outlet pipe, the movable plate continues to rise, and the pressure on the top of the tank increases until the buckle is squeezed off the mounting ring. The return spring pushes the baffle away from the movable plate, and the sewage outlet is opened;

[0036] Step 6: The movable plate falls naturally, open the drain pipe, and discharge the impurities in the tank. During the impurity discharge process, there is some water in the tank. When the water is discharged from the drain pipe, it can bring out the impurities gathered at the bottom of the tank, thereby reducing the difficulty of cleaning the impurities.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. In the present invention, during the lifting process of the screen, the upper support and the lower support respectively support it up and down to prevent the screen from being deformed or damaged by the water pressure; in addition, when the screen rises, the filtered water is pressurized to pass through the mesh holes of the screen in the reverse direction to clean the mesh holes of the screen; when the screen descends, the impurities in the wastewater can be concentrated to the bottom of the tank body, and when the trigger part contacts the movable plate, the upper limit part releases the limit on the lower support, and the cleaning spring quickly lifts the lower support, and the lower support hits the screen and supports the bottom of the screen. The screen rises rapidly due to the impact, and the impurities adhered to the bottom of the screen are separated from the screen, completing the cleaning of the impurities at the bottom of the screen, and finally resetting the screen to filter again, which not only protects the screen, but also can clean the impurities adhered to the mesh holes and the bottom of the screen, can reduce the time consumed in replacing or cleaning the screen, and speed up the efficiency of wastewater treatment.

[0039] 2. Move the installation ring to be flush with the inspection port, remove the side plate, the spring plate can push the card plate, the spring plate is subjected to the reverse force to drive the quick release ring to move, the quick release ring will partially pop out of the tank body through the upper support, it is convenient to take the installation ring, and it is convenient to replace and repair the screen. When assembling the installation ring, insert the installation ring into the movable guide rail, insert the installation ring into the tank body from the inspection port through the side plate, the installation ring will push the limit protrusion upward, when the installation ring drops, the lifting spring pushes the limit protrusion to the inspection port through the limit ring, the limit protrusion limits the side plate through the movable guide rail, so that the side plate can be removed only when the installation ring is flush with the inspection port, avoiding the side plate from being accidentally removed when the wastewater treatment device is in operation, resulting in wastewater leakage and pollution;

[0040] 3. In the present invention, when the trigger rod contacts the movable plate, the lower support presses the baffle plate downward to block the sewage outlet, and the impurities introduced into the bottom of the tank body by the screen and the slope of the movable plate are isolated, and the buckle is clamped on the mounting ring. At this time, the water outlet pipe is opened, and the lifting structure drives the mounting ring to rise, and the movable plate rises accordingly. The movable plate lifts the water in the tank body upward, and the water is discharged from the water outlet pipe. When the mounting ring is about to move to the top, the water outlet pipe is closed, and the movable plate continues to rise. The space at the top of the tank body is compressed, and the pressure increases accordingly until the buckle is squeezed off the mounting ring, and the return spring pushes the baffle plate away from the movable plate, the sewage outlet is opened, and the movable plate falls naturally, and then the sewage pipe is opened to discharge the impurities in the tank body. During the impurity discharge process, some water exists in the tank body. When the water is discharged from the sewage pipe, it can bring out the impurities gathered at the bottom of the tank body, thereby reducing the difficulty of cleaning the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0044] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0045] Figure 4 For the present invention Figure 2 The enlarged structural diagram at B in the middle;

[0046] Figure 5 This is an exploded structural diagram of the mounting ring and its connection relationship of the present invention;

[0047] Figure 6 It is a schematic diagram of the exploded structure of the side panels and their connection relationship of the present invention;

[0048] Figure 7 It is a schematic diagram of the cross-sectional structure of the protection ring and its connection relationship of the present invention;

[0049] Figure 8 It is a schematic diagram of the exploded structure of the movable plate and its connection relationship of the present invention;

[0050] Fig. 9 It is a schematic diagram of the planar structure of the movable guide rail and its connection relationship of the present invention;

[0051] Fig.10 It is a schematic diagram of the process of the present invention;

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 1. Tank body; 11. Water inlet pipe; 12. Water outlet pipe; 13. Drain pipe; 14. Screen; 21. Mounting ring; 22. Upper support; 23. Lower support; 24. Cleaning spring; 31. Limit rod; 32. Limit head; 33. Groove; 34. Connector; 35. Limit slider; 36. Limit spring; 41. Trigger rod; 42. Trigger spring; 43. Trigger head; 51. Quick release ring; 52. Mounting groove; 53. Card plate; 54. Spring plate; 61. Inspection port; 62. Side plate; 63. Fixed guide rail; 64. Movable guide rail; 65. Limit ring; 66. Lifting spring; 67. Limit bump; 71. Movable plate; 72. Buckle; 73. Drain port; 74. Baffle; 75. Reset spring; 81. Protective ring; 82. Positioning ring; 83. Bayonet; 9. Lifting structure. DETAILED DESCRIPTION

[0054] 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.

[0055] See also Figure 1-10 The present invention provides a technical solution: a coal chemical wastewater treatment device, comprising a tank body 1, the side wall of the tank body 1 is connected with an inlet pipe 11 and an outlet pipe 12, the bottom of the tank body 1 is provided with a sewage pipe 13, and a screen 14 is provided inside the tank body 1.

[0056] The mounting ring 21 is slidably arranged with the screen 14 and is slidably arranged in the tank body 1;

[0057] An upper support 22 and a lower support 23, wherein the upper support 22 is disposed on the top of the mounting ring 21, and the lower support 23 is slidably disposed in the mounting ring 21, and the lower support 23 is located below the screen 14;

[0058] A cleaning spring 24 is provided between the lower support 23 and the mounting ring 21;

[0059] An upper limit member, disposed in the mounting ring 21, for limiting the lower support 23;

[0060] A trigger member, used to release the upper limit member from limiting the lower support 23;

[0061] A movable plate 71 is disposed at the bottom of the mounting ring 21 and is used to prevent the trigger member from descending;

[0062] The lifting structure 9 is used to drive the mounting ring 21 to rise and fall;

[0063] Specifically, the wastewater to be treated is injected into the tank body 1 through the water inlet pipe 11, and the water level in the tank body 1 gradually rises, and the screen 14 rises to the top of the mounting ring 21 and contacts the upper support 22. The upper support 22 contacts the screen 14 to support the top of the screen 14, reducing the impact of the water pressure on the screen 14. Large particles of waste residue in the wastewater fall to the bottom of the tank body 1 under the action of gravity. As the suspended matter rises with the water level, the screen 14 intercepts the suspended matter and small particles of waste in the water. The filtered water is discharged from the tank body 1 through the outlet pipe 12. As time goes by, the number of blocked meshes of the screen 14 gradually increases.

[0064] When it is necessary to clean the screen 14, the water inlet pipe 11 and the water outlet pipe 12 are closed, and the lifting structure 9 drives the mounting ring 21 to rise. The mounting ring 21 rises, and because the screen 14 is blocked, the screen 14 pushes the lower support 23 to descend relative to the mounting ring 21. The screen 14 compresses the cleaning spring 24 through the lower support 23, and pushes the lower support 23 to the upper limit member. The upper limit member limits the lower support 23, and the lower support 23 and the screen 14 stop moving relative to the mounting ring 21. The screen 14 begins to rise with the mounting ring 21, and the lower support 23 supports the bottom of the screen 14. The space above the screen 14 is compressed, and the water above the screen 14 passes through the mesh of the screen 14 in the reverse direction under the action of pressure. The mesh of the screen 14 is flushed with pressurized water, and the impurities blocked in the mesh can be pushed out and separated from the screen 14, completing the cleaning of the impurities blocked in the mesh of the screen 14.

[0065] The lifting structure 9 drives the mounting ring 21 to descend, and the mounting ring 21 drives the upper support 22 to descend. The screen 14 is separated from the lower support 23 and fits with the upper support 22 under the action of water pressure. The screen 14 contacts the upper support 22 and then descends. The screen 14 presses down the impurities in the wastewater, and the impurities under the screen 14 are compressed to the bottom of the tank body 1, and the lower support 23 also descends accordingly. Before the trigger member contacts the movable plate 71, the lifting structure 9 slows down the descending speed of the mounting ring 21, and the screen 14 descends under the action of gravity. When the trigger member contacts the movable plate 71, the upper limit member releases the limit on the lower support 23, and the cleaning spring 24 quickly lifts the lower support 23, and the lower support 23 hits the screen 14 and supports the bottom of the screen 14. The screen 14 rises rapidly under the impact, and the impurities adhered to the bottom of the screen 14 are separated from the screen 14, completing the cleaning of the impurities at the bottom of the screen 14; the lifting structure 9 resets the screen 14 through the mounting ring 21, and filtering can be carried out again;

[0066] In summary, during the lifting and lowering process of the screen 14, the upper support 22 and the lower support 23 respectively support it up and down to prevent the screen 14 from being deformed or damaged by the water pressure; in addition, when the screen 14 rises, the filtered water is pressurized to pass through the mesh of the screen 14 in the reverse direction to clean the mesh of the screen 14; when the screen 14 descends, the impurities in the wastewater can be concentrated to the bottom of the tank body 1, and when the trigger member contacts the movable plate 71, the upper limit member releases the limit on the lower support 23, and the cleaning spring 24 quickly lifts the lower support 23, and the lower support 23 hits the screen 14 and supports the bottom of the screen 14. The screen 14 rises rapidly due to the impact, and the impurities adhered to the bottom of the screen 14 are separated from the screen 14, and the impurities at the bottom of the screen 14 are cleaned. Finally, the screen 14 can be reset to filter again, which not only protects the screen 14, but also can clean the impurities adhered to the mesh and the bottom of the screen 14, which can reduce the time consumed in replacing or cleaning the screen 14 and speed up the efficiency of wastewater treatment.

[0067] The upper limit member comprises:

[0068] The limiting rod 31 is fixed to the bottom of the mounting ring 21;

[0069] The limiting head 32 is fixedly mounted on the top of the limiting rod 31 and is provided with a groove 33;

[0070] The connecting member 34 is fixed to the side wall of the lower support 23 and is slidably arranged with the mounting ring 21;

[0071] The limiting slider 35 is slidably disposed in the connecting member 34 and has a rounded corner at the bottom;

[0072] A limit spring 36 is installed between the connecting member 34 and the limit slider 35;

[0073] For details, see the attached manual. Figure 2 and Figure 3 The connecting piece 34 rises and falls with the lower support 23. When the screen 14 rises, the mounting ring 21 rises, and the screen 14 first descends relative to the mounting ring 21. The screen 14 drives the connecting piece 34 to descend through the lower support 23. When the limit slider 35 in the connecting piece 34 contacts the limit head 32, the limit head 32 compresses the limit spring 36. When the limit slider 35 passes over the limit head 32, the limit spring 36 pops out the limit slider 35. The limit head 32 limits the connecting piece 34 through the limit slider 35, thereby completing the limitation of the lower support 23.

[0074] The triggering member comprises:

[0075] The trigger rod 41 is slidably arranged with the limiting rod 31, and the bottom thereof passes through the mounting ring 21, and the trigger spring 42 is arranged between the trigger rod 41 and the limiting rod 31;

[0076] The trigger head 43 is fixedly mounted on the top of the trigger rod 41 and has chamfers on both sides;

[0077] For details, see the attached manual. Figure 2 and Figure 3 When the trigger rod 41 contacts the movable plate 71, the trigger rod 41 stops descending, while the limit rod 31 continues to descend, the trigger head 43 moves into the groove 33 and squeezes the limit slider 35 into the connecting piece 34, releasing the compressed cleaning spring 24, thereby realizing the rapid rebound of the lower support 23, and cleaning the impurities adhered to the bottom of the screen 14.

[0078] A quick-release structure is installed between the lifting structure 9 and the upper support 22. The side wall of the tank body 1 is provided with an inspection port 61, and the inspection port 61 is provided with a side plate 62. The quick-release structure includes:

[0079] A quick-release ring 51 is fixedly mounted on the top of the upper support 22, and a mounting groove 52 is formed on the side wall of the mounting ring 21;

[0080] The clamping plate 53 is slidably disposed in the quick-release ring 51 and installed at the bottom of the lifting structure 9;

[0081] The spring plate 54 is installed in the quick release ring 51;

[0082] For details, see the attached manual. Figure 2 and Figure 4 , move the mounting ring 21 to be flush with the inspection port 61, remove the side plate 62, the spring plate 54 can push the clamping plate 53, and the spring plate 54 is subjected to the reverse force to drive the quick-release ring 51 to move, and the quick-release ring 51 partially pops out of the tank body 1 through the upper support 22, making it convenient to take the mounting ring 21 and to replace and repair the screen 14. Conversely, after compressing the spring plate 54, install the side plate 62 back on the tank body 1.

[0083] The tank body 1 is provided with a fixed guide rail 63 which is slidably arranged with the mounting ring 21, the side plate 62 is provided with a movable guide rail 64, a limit ring 65 is slidably arranged in the tank body 1, a lifting spring 66 is fixedly arranged between the limit ring 65 and the tank body 1, and a limit protrusion 67 is fixedly arranged at the bottom of the limit ring 65, and the limit protrusion 67 limits the outward movement of the side plate 62 through the movable guide rail 64;

[0084] For details, see the instructions Figure 2 , Figure 7 and Fig. 9 When assembling the mounting ring 21, insert the mounting ring 21 onto the movable guide rail 64, insert the mounting ring 21 into the tank body 1 from the inspection port 61 through the side plate 62, and the mounting ring 21 pushes the limiting protrusion 67 upward. When the mounting ring 21 descends, the lifting spring 66 pushes the limiting protrusion 67 to the inspection port 61 through the limiting ring 65, and the limiting protrusion 67 limits the side plate 62 through the movable guide rail 64, so that the side plate 62 can be removed only when the mounting ring 21 is flush with the inspection port 61, so as to avoid the side plate 62 being removed by mistake when the wastewater treatment device is in operation, resulting in wastewater leakage and pollution; the fixed guide rail 63 guides the mounting ring 21, and at the same time, the mounting ring 21 can be introduced into the movable guide rail 64.

[0085] The outer wall of the tank body 1 is slidably provided with a protective ring 81, and the protective ring 81 is provided with positioning rings 82 on both sides thereof. The side wall of the tank body 1 is fixedly provided with a bayonet 83 cooperating with the positioning ring 82, and the bayonet 83 has at least two portions and is respectively located on both sides thereof.

[0086] Specifically, the protective ring 81 can be fixed to the tank body 1 by means of a positioning ring 82 and a bayonet 83. When the protective ring 81 is flush with the inspection port 61, the side panel 62 can be further protected to prevent wastewater leakage at the inspection port 61. When the protective ring 81 is fixed to the tank body 1 when the inspection port 61 is exposed, the installation ring 21 and the screen 14 can be easily loaded and unloaded.

[0087] The upper surface of the movable plate 71 is provided with a buckle 72 that can be engaged with the mounting ring 21. The movable plate 71 is provided with a sewage outlet 73. The sewage outlet 73 is slidably provided with a baffle 74. A return spring 75 is installed between the movable plate 71 and the baffle 74. The upper surface of the movable plate 71 is provided with a slope.

[0088] Specifically, when the trigger rod 41 contacts the movable plate 71, the lower support 23 presses the baffle plate 74 downward to block the sewage outlet 73, and the impurities introduced into the bottom of the tank body 1 by the screen 14 and the movable plate 71 are isolated. The buckle 72 is clamped on the mounting ring 21. At this time, the water outlet pipe 12 is opened, and the lifting structure 9 drives the mounting ring 21 to rise, and the movable plate 71 rises accordingly. The movable plate 71 lifts the water in the tank body 1 upward, and the water is discharged from the water outlet pipe 12. When the mounting ring 21 is about to move to the top, the water outlet pipe is closed. 12. The movable plate 71 continues to rise, the space at the top of the tank body 1 is compressed, and the pressure increases accordingly, until the buckle 72 is squeezed off the mounting ring 21, and the return spring 75 pushes the baffle 74 away from the movable plate 71, the drain port 73 is opened, and the movable plate 71 falls naturally, and then the drain pipe 13 is opened to discharge the impurities in the tank body 1. During the impurity discharge process, there is some water in the tank body 1. When the water is discharged from the drain pipe 13, it can bring out the impurities gathered at the bottom of the tank body 1, thereby reducing the difficulty of cleaning the impurities.

[0089] A working method of a coal chemical wastewater treatment device, the specific steps are as follows:

[0090] Step 1: Inject wastewater into the tank 1 through the water inlet pipe 11, and large impurities in the wastewater fall to the bottom of the tank 1. The screen 14 filters the wastewater, and the upper support 22 supports the top of the screen 14. The filtered water is discharged from the outlet pipe 12;

[0091] Step 2: When cleaning the screen 14, the driving mounting ring 21 rises, the blocked screen 14 squeezes the lower support 23, the upper limit piece limits the lower support 23, the screen 14 rises, the lower support 23 supports the bottom of the screen 14, the water on the top of the tank body 1 is squeezed through the mesh of the screen 14, and the impurities in the mesh are squeezed out, and the mesh is cleaned;

[0092] Step 3: Drive the mounting ring 21 downward, the movable plate 71 releases the limit of the upper limit member on the lower support 23 through the trigger member, and the cleaning spring 24 quickly bounces the lower support 23, the lower support 23 hits the screen 14 and supports the bottom of the screen 14, the screen 14 rises rapidly under the impact, and the impurities adhered to the bottom of the screen 14 are separated from the screen 14, and the impurities at the bottom of the screen 14 are cleaned;

[0093] Step 4: At the same time, the lower support 23 presses the baffle 74 downward to block the sewage outlet 73, the buckle 72 is clamped on the mounting ring 21, the water outlet pipe 12 is opened, the mounting ring 21 is driven to rise, and the movable plate 71 lifts the water in the tank body 1 upward, and the water is discharged from the water outlet pipe 12;

[0094] Step 5: Close the water outlet pipe 12, the movable plate 71 continues to rise, and the pressure on the top of the tank body 1 increases until the buckle 72 is squeezed off the mounting ring 21, and the return spring 75 pushes the baffle 74 away from the movable plate 71, and the sewage outlet 73 is opened;

[0095] Step 6: The movable plate 71 falls naturally, and the drain pipe 13 is opened to discharge the impurities in the tank body 1. During the impurity discharge process, there is some water in the tank body 1. When the water is discharged from the drain pipe 13, it can bring out the impurities gathered at the bottom of the tank body 1, thereby reducing the difficulty of cleaning the impurities.

Claims

1. A coal chemical wastewater treatment device, comprising a tank body (1), the side wall of the tank body (1) is connected with a water inlet pipe (11) and a water outlet pipe (12), the bottom of the tank body (1) is provided with a sewage pipe (13), and a screen (14) is provided inside the tank body (1), characterized in that: A mounting ring (21) is slidably arranged with the screen (14) and is slidably arranged in the tank body (1); an upper support (22) and a lower support (23), wherein the upper support (22) is arranged on the top of the mounting ring (21), and the lower support (23) is slidably arranged in the mounting ring (21), and the lower support (23) is located below the screen (14); A cleaning spring (24) is arranged between the lower support (23) and the mounting ring (21); An upper limit member, arranged in the mounting ring (21) and used for limiting the lower support (23); A triggering member, used for releasing the limit of the lower support (23) by the upper limit member; A movable plate (71) is arranged at the bottom of the mounting ring (21) and is used to prevent the trigger member from descending; The lifting structure (9) is used to drive the mounting ring (21) to lift.

2. A coal chemical wastewater treatment device according to claim 1, characterized in that: The upper limit member comprises: A limiting rod (31) is fixedly arranged at the bottom of the mounting ring (21); A limiting head (32) is fixedly mounted on the top of the limiting rod (31) and is provided with a groove (33); A connecting member (34) is fixed to the side wall of the lower support (23) and is slidably arranged with the mounting ring (21); A limit slider (35) is slidably disposed in the connecting member (34) and has a rounded corner at the bottom; The limiting spring (36) is installed between the connecting member (34) and the limiting slide block (35).

3. A coal chemical wastewater treatment device according to claim 1, characterized in that: The triggering member comprises: The trigger rod (41) is slidably arranged with the limiting rod (31), and the bottom thereof passes through the mounting ring (21); the trigger spring (42) is arranged between the trigger rod (41) and the limiting rod (31); The trigger head (43) is fixed to the top of the trigger rod (41) and has chamfers on both sides.

4. A coal chemical wastewater treatment device according to claim 1, characterized in that: A quick-release structure is installed between the lifting structure (9) and the upper support (22); a side wall of the tank body (1) is provided with an inspection opening (61), and a side plate (62) is installed on the inspection opening (61); the quick-release structure comprises: A quick-release ring (51) is fixedly mounted on the top of the upper support (22), and a mounting groove (52) is formed on the side wall of the mounting ring (21); A clamping plate (53) is slidably disposed in the quick-release ring (51) and is installed at the bottom of the lifting structure (9); The spring plate (54) is installed in the quick-release ring (51).

5. A coal chemical wastewater treatment device according to claim 4, characterized in that: A fixed guide rail (63) is provided in the tank body (1) and is slidably arranged with the mounting ring (21); a movable guide rail (64) is installed in the side plate (62); a limit ring (65) is slidably arranged in the tank body (1); a lifting spring (66) is fixedly arranged between the limit ring (65) and the tank body (1); a limit protrusion (67) is fixedly arranged at the bottom of the limit ring (65); and the limit protrusion (67) limits the outward movement of the side plate (62) through the movable guide rail (64).

6. A coal chemical wastewater treatment device according to claim 5, characterized in that: The outer wall of the tank body (1) is slidably provided with a protective ring (81), and positioning rings (82) are provided on the upper and lower sides of the protective ring (81). The side wall of the tank body (1) is fixedly provided with a bayonet (83) that cooperates with the positioning ring (82), and there are at least two bayonet pins (83) that are respectively located on the upper and lower sides of the protective ring (81).

7. A coal chemical wastewater treatment device according to claim 1, characterized in that: The upper surface of the movable plate (71) is provided with a buckle (72) capable of being engaged with the mounting ring (21); the movable plate (71) is provided with a sewage outlet (73); the sewage outlet (73) is slidably provided with a baffle (74); a return spring (75) is installed between the movable plate (71) and the baffle (74); and the upper surface of the movable plate (71) is provided with a slope.

8. A working method of a coal chemical wastewater treatment device according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: Step 1: Inject wastewater into the tank body (1) through the water inlet pipe (11), large particles of impurities in the wastewater fall to the bottom of the tank body (1), the screen (14) filters the wastewater, the upper support (22) supports the top of the screen (14), and the filtered water is discharged from the water outlet pipe (12); Step 2: When cleaning the screen (14), the mounting ring (21) is driven to rise, the blocked screen (14) squeezes the lower support (23), and the upper limit member limits the lower support (23). The screen (14) rises, and the lower support (23) supports the bottom of the screen (14). The water on the top of the tank body (1) is squeezed to pass through the mesh of the screen (14), and the impurities in the mesh are squeezed out, and the mesh is cleaned; Step 3: The mounting ring (21) is driven to descend, and the movable plate (71) releases the limit of the upper limit member on the lower support (23) through the trigger member, and the cleaning spring (24) quickly bounces the lower support (23), and the lower support (23) hits the screen (14) and supports the bottom of the screen (14). The screen (14) rises rapidly due to the impact, and the impurities adhered to the bottom of the screen (14) are separated from the screen (14), and the impurities at the bottom of the screen (14) are cleaned; Step 4: At the same time, the lower support (23) presses the baffle (74) downward to block the sewage outlet (73), the buckle (72) is clamped on the mounting ring (21), the water outlet pipe (12) is opened, the mounting ring (21) is driven to rise, and the movable plate (71) lifts the water in the tank body (1) upward, and the water is discharged from the water outlet pipe (12); Step 5: The water outlet pipe (12) is closed, the movable plate (71) continues to rise, and the pressure on the top of the tank body (1) increases until the buckle (72) is squeezed off the mounting ring (21), and the return spring (75) pushes the baffle (74) away from the movable plate (71), and the sewage outlet (73) is opened; Step 6: The movable plate (71) falls naturally, and the drain pipe (13) is opened to discharge the impurities in the tank body (1). During the process of discharging impurities, some water exists in the tank body (1). When the water is discharged from the drain pipe (13), it can bring out the impurities accumulated at the bottom of the tank body (1), thereby reducing the difficulty of cleaning the impurities.

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