A coal chemical wastewater treatment device

Abstract

The present application provides a coal chemical wastewater treatment device, which belongs to the technical field of wastewater treatment, and comprises a shell component, wherein a plurality of filter cartridges are arranged in a linear array inside the shell component, a connecting cylinder is installed between two filter cartridges, a plurality of blocking blocks are annularly opened on the connecting cylinder, a concentrated liquid flow opening is retained between every two blocking blocks, a filtered liquid flow pipe is arranged on the connecting cylinder, the filtered liquid flow pipe is coaxially arranged with the connecting cylinder, and a concentrated liquid perfusion pipe and a filtered liquid perfusion pipe are connected between the two connecting cylinders; the present application can connect two adjacent filter cartridges together by setting a connecting piece, and in the process of repairing or replacing one of the filter cartridges, the sewage can be directly transmitted between the two adjacent connecting pieces, and the other filter cartridges can be used to treat the sewage to maintain work efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a coal chemical sewage treatment device. Background Art

[0002] Coal chemical wastewater refers to wastewater generated in the coal chemical production process. This type of wastewater has the characteristics of large discharge volume, multiple types of pollutants and high concentration. Coal chemical wastewater mainly includes gasification wastewater, chemical plant wastewater, ground washing water, initial rainwater and domestic sewage, etc. These wastewaters contain more than 300 pollutants such as phenol, ammonia, tar, phenol, cyanide, sulfide, etc., which have significant harm to the environment.

[0003] Existing equipment usually uses reverse osmosis membrane to treat sewage. The reverse osmosis membrane sewage treatment device is a device that uses reverse osmosis filtration membrane to purify sewage. It uses pressure difference as the driving force to separate the solvent from the solution. When it is working, it applies pressure to the liquid on one side of the membrane. When the pressure exceeds its osmotic pressure, the solvent will reversely permeate in the opposite direction of natural osmosis. The osmotic solution and the remaining concentrated liquid are discharged from different outlets respectively to complete the treatment of sewage.

[0004] Referring to the Chinese patent document with announcement number CN113321268B and titled A Continuous Water Treatment for Sewage Plants with Reverse Osmosis Function, the invention comprises a primary filter tube and a secondary filter tube, wherein a plurality of filter membrane groups are arranged inside the primary filter tube, and the plurality of filter membrane groups are connected end to end in sequence, and the filter membrane group is composed of a main spiral tube and a filter membrane tube connected together, and a filter membrane sheet is wrapped on the outside of the filter membrane tube. When in use, the sewage is passed through the primary filter tube and the secondary filter tube in sequence, and the sewage is double-filtered. The primary filter tube is provided with a segmented main spiral tube, a filter membrane tube and a filter membrane sheet, so that it is easy to disassemble and replace the filter membrane sheet of each segment, thereby improving the working efficiency within a limited time.

[0005] Referring to the above technical solution, during the inspection, maintenance or replacement of one of the filter membrane groups inside the filter tube, the filter tube needs to stop working and wait for the maintenance or replacement to be completed before it can start filtering sewage again. During the maintenance or replacement of the filter membrane group, the equipment needs to be shut down, which will reduce work efficiency. Summary of the invention

[0006] In view of this, the present application provides a coal chemical wastewater treatment device, which is mainly used to solve the problem of equipment shutdown during the maintenance or replacement of the filter membrane group.

[0007] To solve the above technical problems, the present application provides a coal chemical wastewater treatment device, including a shell component, wherein a plurality of filter cartridges are arranged in a linear array inside the shell component, a connecting cylinder is installed between two filter cartridges, a plurality of blocking blocks are provided in an annular manner on the connecting cylinder, a concentrated liquid flow port is retained between each two blocking blocks, a filtered liquid flow tube is provided on the connecting cylinder, the filtered liquid flow tube is coaxially arranged with the connecting cylinder, a concentrated liquid perfusion tube and a filtered liquid perfusion tube are connected between the two connecting cylinders, a first sleeve is coaxially arranged at both ends of the connecting cylinder in a rotationally connected manner, a baffle for blocking the concentrated liquid from flowing out of the connecting cylinder is installed on the first sleeve, a first connecting port is provided on the first sleeve, a second sleeve is slidably installed on the filtered liquid flow tube, a second connecting port is provided on the filtered liquid flow tube, a third connecting port is provided on the second sleeve, and a fourth connecting port coaxial with the second connecting port is provided on the blocking block.

[0008] By adopting the above technical solution, the housing assembly can protect the filter cartridge. When sewage passes through the filter cartridge, the permeable sheet arranged inside the filter cartridge can separate the permeate and the concentrate inside the sewage. The connecting cartridge can splice two adjacent filter cartridges together. When replacing or repairing any one of the filter cartridges, it is only necessary to separate the connecting cartridge from the filter cartridge. The blocking block separates the space inside the connecting cartridge into equal-sized concentrate flow ports, and the filtrate flows from one filter cartridge into an adjacent connecting cartridge through the filtrate perfusion pipe. When the first sleeve rotates, it can drive the baffle to block the flow port on one side of the connecting cartridge, and at the same time, the first connecting port can be aligned with the filtrate perfusion pipe, so that the filtrate inside the connecting cartridge flows directly into the next connecting cartridge through the filtrate perfusion pipe. Similarly, when the second sleeve rotates, the third connecting port is aligned with the fourth connecting port and the second connecting port, so that the filtrate inside the filtrate flow pipe flows directly into the next connecting cartridge through the filtrate perfusion pipe. When one or two filter cartridges are repaired or replaced, the equipment can be kept in working condition through the connecting cartridge, thereby improving work efficiency.

[0009] Optionally, both the first sleeve and the second sleeve are driven by an externally connected driving member.

[0010] By adopting the above technical solution, when the driving source of the first sleeve is output, the second sleeve can be synchronously driven by hydraulic oil, thereby reducing the output of the driving source power and saving resources.

[0011] Optionally, the driving member includes a first telescopic cylinder fixedly mounted on a connecting tube, a connecting rod is hingedly mounted on the first telescopic cylinder, a gear is fixedly mounted on the first sleeve, a hole is penetrated through the connecting tube for the gear to pass through, a limit rod is vertically slidably mounted on the outer shell assembly, a tooth plate meshing with the gear is fixedly mounted on the limit rod, and the tooth plate and the connecting rod are hingedly mounted.

[0012] By adopting the above technical solution, the first telescopic cylinder can drive one end of the connecting rod to move horizontally, thereby making the other end of the connecting rod and the tooth plate move vertically. The gear meshing with the tooth plate can drive the first sleeve to rotate under the output of power, and the limit rod can limit the vertical movement of the tooth plate to prevent the tooth plate from shifting.

[0013] Optionally, a return spring is arranged around the limiting rod.

[0014] By adopting the above technical solution, the return spring can assist the tooth plate to drive the gear to return to its original position.

[0015] Optionally, the driving member also includes a second telescopic push rod arranged inside the blocking block, a hydraulic oil pipe is connected between the first hydraulic cylinder and the second telescopic push rod, and a connecting block for driving the second sleeve to slide is installed on the second telescopic push rod.

[0016] By adopting the above technical solution, the first hydraulic cylinder can drive the hydraulic oil inside the hydraulic oil pipe to move while being driven, thereby causing the second telescopic push rod to extend and retract. Under the connection of the connecting block, the second sleeve can be driven to extend and retract on the tube through which the filtered liquid flows.

[0017] Optionally, a sealing rubber ring is installed on the first sleeve through a threaded groove, and the sealing rubber ring is used to prevent the concentrated liquid from flowing out from the connection between the connecting cylinder and the filter cylinder, and the sealing rubber ring abuts against the inner side of the connecting cylinder.

[0018] By adopting the above technical solution, when the first sleeve rotates, the thread inside the thread groove rotates. Under the friction force of the sealing rubber ring abutting against the inner side of the connecting tube, the thread can push the sealing rubber ring to rotate, so that the sealing rubber ring and the filter tube are tightly connected or separated.

[0019] Optionally, the housing assembly comprises a lower membrane shell and an upper membrane shell, a plurality of upper membrane shells are arranged in an array on the lower membrane shell, and the upper membrane shell is clamped on the lower membrane shell by a snap fastener.

[0020] By adopting the above technical solution, when repairing or replacing a single filter cartridge, it is only necessary to remove the corresponding upper membrane shell. The upper membrane shell adopts the arrangement of snap fasteners to facilitate disassembly.

[0021] Optionally, a sewage discharge pipe is provided on the lower membrane shell.

[0022] By adopting the above technical solution, when the filter cartridge and the connecting cartridge are separated, the sewage inside the filter cartridge can be discharged through the sewage pipe, thereby preventing the sewage from falling on the ground and causing environmental pollution.

[0023] In summary, compared with the prior art, the present application has at least one of the following beneficial technical effects: 1. During the replacement or maintenance of one of the filter cartridges, the sewage inside the connecting cartridge can flow directly into the adjacent connecting cartridge, so that the other filter cartridges remain in working condition, thus ensuring working efficiency.

[0024] 2. Installing a sealing rubber ring at the joint of the filter cartridge and the connecting cartridge can make the two more tightly connected and prevent sewage from leaking during the flow.

[0025] 3. By setting a single upper membrane shell corresponding to a single filter cartridge, it is convenient to disassemble a single filter cartridge during the maintenance of the filter cartridge. A sewage pipe is set on the lower membrane shell. After one of the filter cartridges is disassembled, it is convenient for sewage to flow out from the sewage pipe, preventing sewage from flowing to the ground and causing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a coal chemical wastewater treatment device for this application; Figure 2 An exploded view of the housing assembly of this application; Figure 3 This is a schematic diagram of the structure of the filter cartridge of this application; Figure 4 This is a schematic diagram of the structure of the connecting tube of this application; Figure 5 The state of the drive member and the connecting cylinder for this application Figure 1 ; Figure 6 The state of the drive member and the connecting tube for this application Figure 2 ; Figure 7 This is a schematic diagram of the structure of the first sleeve of this application; Figure 8 This is a cross-sectional view of the first sleeve and the connecting sleeve of the present application; Fig. 9 A top view of the second sleeve and the driving member of the present application; Fig.10 A bottom view of the second sleeve and the driving member of the present application; Fig.11 This is a schematic diagram of the structure of the fastener of this application.

[0027] Description of reference numerals: 100, housing assembly; 101, lower membrane shell; 102, upper membrane shell; 103, snap-fit ​​member; 104, drain pipe; 200, filter cartridge; 300, connector; 301, connecting cartridge; 302, blocking block; 303, concentrate flow port; 304, filtered liquid flow tube; 305, concentrate perfusion tube; 306, filtered liquid perfusion tube; 307, first sleeve; 308, baffle; 30 9. First connecting port; 310. Sealing rubber ring; 311. Second sleeve; 312. Second connecting port; 313. Third connecting port; 314. Fourth connecting port; 400. Driving member; 401. First telescopic oil cylinder; 402. Connecting rod; 403. Gear; 404. Limiting rod; 405. Tooth plate; 406. Return spring; 407. Second telescopic push rod; 408. Hydraulic oil pipe; 409. Connecting block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 11 , the technical scheme of the embodiment of the present application is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The present embodiment provides a coal chemical wastewater treatment device, including a housing assembly 100, a filter cartridge 200, a connector 300 and a drive member 400. A plurality of filter cartridges 200 are arranged in the housing assembly 100, and the filter cartridges 200 are distributed in a linear array. The filter cartridges 200 at both ends are respectively connected to the inlet and outlet of the sewage and the outlet. Two adjacent filter cartridges 200 are assembled and installed through the connector 300. The drive member 400 is used to connect the concentrate and the filtered liquid inside the two adjacent connectors 300. The drive member 400 can also isolate the filter cartridge 200 from the liquid inside the connector 300, so that the liquid can flow directly between the two adjacent connectors 300, which is convenient for repairing or replacing one of the filter cartridges 200.

[0030] Reference Figure 2 , Figure 3 and Fig.11The housing assembly 100 includes a lower membrane shell 101, an upper membrane shell 102, a fastener 103 and a drain pipe 104. A plurality of upper membrane shells 102 are linearly mounted on the lower membrane shell 101 through the fastener 103, and an upper membrane shell 102 is correspondingly mounted on each filter cartridge 200. The cylinder composed of the lower membrane shell 101 and the plurality of array-distributed upper membrane shells 102 is used to protect the array-distributed filter cartridges 200. When the corresponding filter cartridge 200 is replaced after maintenance, the corresponding upper membrane shell 102 can be removed.

[0031] Reference Figure 2 , Figure 4 and Figure 5 The connecting member 300 includes a connecting cylinder 301, a blocking block 302, a filtrate flow tube 304, a concentrate perfusion tube 305, and a filtrate perfusion tube 306. The connecting cylinder 301 is provided in multiple numbers and is respectively located between two filter cylinders 200. The blocking blocks 302 are provided in four numbers and are arranged in an annular array on the inner wall of the connecting cylinder 301. A concentrate flow port 303 is reserved between two adjacent blocking blocks 302. The filtrate flow tube 304 is fixedly installed in the connecting cylinder 301 and is coaxially arranged with the connecting cylinder 301. The blocking blocks 302 are respectively fixedly connected to the filtrate flow tube 304 and the connecting cylinder 301. A concentrate perfusion tube 305 and a filtrate perfusion tube 306 that penetrate the lower membrane shell 101 are installed between two adjacent connecting cylinders 301. The concentrate perfusion tube 305 and the filtrate perfusion tube 306 are both arranged in a U shape.

[0032] Reference Figure 5 , Figure 6 and Figure 7 The connector 300 further includes a first sleeve 307, a baffle 308, a first communication port 309 and a sealing rubber ring 310. The first sleeve 307 is provided in two pieces, which are rotatably connected to the two ends of the opening of the connecting cylinder 301 respectively. The first sleeve 307 and the connecting cylinder 301 are coaxially arranged. The first sleeve 307 is provided with a baffle 308 for blocking the sewage in the connecting cylinder 301 from flowing out. The baffle 308 is provided with a hole coaxial with the filtrate flow-through pipe 304. The baffle 308 can correspond to the blocking block 302 when rotating to open, so as to ensure that the concentrate flows out from the concentrate flow-through port 303. The baffle 308 can correspond to the concentrate flow-through port 303 when rotating to close, so as to prevent the concentrate from flowing out from the concentrate flow-through port 303.

[0033] When in use, when the first sleeve 307 rotates clockwise by a certain angle, the baffle 308 can be driven to open, so that the baffle 308 overlaps with the blocking block 302, and the first communication port 309 is misaligned with the concentrate perfusion tube 305. At the same time, under the action of the threaded connection, the sealing rubber ring 310 abutting against the inner wall of the connecting cylinder 301 is hindered from rotating under the action of friction. The rotation of the thread drives the sealing rubber ring 310 to abut against the filter cartridge 200, so that the connecting piece 300 and the filter cartridge 200 are tightly connected, and the pre-filter 300 is pre-filtered. Prevent sewage from leaking when it flows through; on the contrary, when one of the filter cartridges 200 needs to be repaired or replaced, the first sleeve 307 is rotated clockwise to overlap the baffle 308 with the concentrated liquid flow port 303, thereby blocking sewage from flowing from the connecting cylinder 301 into the filter cartridge 200. At the same time, the sealing rubber ring 310 is spirally retracted to facilitate the removal of the filter cartridge 200. At this time, the first connecting port 309 overlaps with the concentrated liquid perfusion tube 305, and the concentrated liquid can directly flow into the next adjacent connecting cylinder 301 through the concentrated liquid perfusion tube 305.

[0034] Reference Figure 8 The connecting member 300 further includes a second sleeve 311, a second communication port 312, a third communication port 313 and a fourth communication port 314. A slide groove is provided on the inner wall of the filtrate flow-through pipe 304, on which the second sleeve 311 is horizontally slidably mounted, the second communication port 312 is provided on the filtrate flow-through pipe 304, the third communication port 313 is provided on the second sleeve 311, and the fourth communication port 314 is provided on the blocking block 302 located below, the fourth communication port 314 is coaxially arranged with the second communication port 312, the third communication port 313 follows the second sleeve 311 to slide horizontally in the slide groove, and is respectively misaligned or overlapped with the fourth communication port 314 and the second communication port 312.

[0035] During use, when the sewage inside the connecting cylinder 301 flows directly into the filter cylinder 200, the second sleeve 311 slides on the filtered liquid flow tube 304, so that the third communication port 313 is misaligned with the fourth communication port 314 and the second communication port 312, and the permeate can directly flow from the filtered liquid flow tube 304 into the corresponding filtered liquid tube in the filter cylinder 200; when the filter cylinder 200 is replaced after maintenance, the second sleeve 311 slides to make the third communication port 313 coincide with the fourth communication port 314 and the second communication port 312, and the permeate can directly flow into the next adjacent connecting cylinder 301 through the permeate perfusion tube.

[0036] Reference Figure 5 and Figure 6The driving member 400 includes a first telescopic cylinder 401 , a connecting rod 402 , a gear 403 , a limiting rod 404 , a toothed plate 405 and a return spring 406 . The first telescopic oil cylinder 401 is fixedly mounted on the outer side wall of the connecting cylinder 301. There are two first telescopic oil cylinders 401. The telescopic ends of the two first telescopic oil cylinders 401 are respectively facing the horizontal planes at both ends of the connecting cylinder 301. The piston rods of the first telescopic oil cylinders 401 are hinged with connecting rods 402. The side walls of the connecting cylinder 301 are symmetrically provided with through holes. The gear 403 is fixedly mounted on the first sleeve 307. The gear 403 passes through the through holes. A limit rod 404 is vertically slidably mounted on the lower membrane shell 101. The limit rod 404 limits the tooth plate 405 to slide vertically. A tooth plate 405 is fixedly mounted on the top of the limit rod 404. The tooth plate 405 is meshed with the gear 403. A reset spring 406 is arranged around the limit rod 404. The reset spring 406 is used to drive the limit rod 404 to reset.

[0037] When in use, the piston rod of the first telescopic cylinder 401 can drive the limit rod 404 to move downward through the connecting rod 402 while contracting, thereby driving the tooth plate 405 to move downward, and the tooth plate 405 engages with the thread on the gear 403, thereby driving the gear 403 to rotate clockwise; when the piston rod of the first telescopic cylinder 401 is extended, the tooth plate 405 moves upward, and the return spring 406 can further assist the tooth plate 405 to move upward, driving the gear 403 to rotate counterclockwise.

[0038] Reference Fig. 9 and Fig.10 The driving member 400 further includes a second telescopic push rod 407, a hydraulic oil pipe 408 and a connecting block 409. A placement slot is provided inside the blocking block 302, and the second telescopic push rod 407 is provided inside the placement slot. A hydraulic oil pipe 408 is connected between the first hydraulic oil cylinder and the second telescopic push rod 407. The hydraulic oil inside the hydraulic oil pipe 408 can drive the second telescopic push rod 407 during the movement. A connecting block 409 is fixedly installed on the sliding rod of the second telescopic push rod 407, and the connecting block 409 is fixedly connected to the side wall of the second sleeve 311.

[0039] When in use, the piston rod of the first telescopic cylinder 401 can drive the hydraulic oil inside the hydraulic oil pipe 408 to move while contracting, and then the hydraulic oil pushes the telescopic rod on the second telescopic push rod 407 to slide, and under the connection of the connecting block 409, the second sleeve 311 slides, and the third connecting port 313 is misaligned with the fourth connecting port 314 and the second connecting port 312; on the contrary, when the piston rod of the first telescopic cylinder 401 is extended, the hydraulic oil inside the hydraulic oil pipe 408 moves, causing the second sleeve 311 to slide, and the third connecting port 313 coincides with the fourth connecting port 314 and the second connecting port 312.

[0040] The implementation principle of a coal chemical wastewater treatment device in the embodiment of the present application is: During the maintenance or replacement of one of the filter cartridges 200, the baffles 308 corresponding to the two ends of the filter cartridge 200 are first closed, and the first telescopic oil cylinder 401 is started to extend the piston rod, driving the tooth plate 405 to move vertically upward, and the gear 403 meshing with the tooth plate 405 rotates counterclockwise by a certain angle. At this time, the sealing rubber ring 310 is separated from the filter cartridge 200, and the first connecting port 309 coincides with the inlet of the concentrate perfusion tube 305. The baffle 308 blocks the concentrate and permeate in the connecting cylinder 301 from flowing into the filter cartridge. 200; synchronously, the first telescopic oil cylinder 401 drives the hydraulic oil inside the hydraulic oil pipe 408 to move while extending and retracting, and the hydraulic oil pushes the sliding rod on the second telescopic push rod 407 to slide, so that the third connecting port 313 coincides with the fourth connecting port 314 and the second connecting port 312, and the filtered liquid flowing through the tube 304 directly flows into the next adjacent connecting tube 301 through the filtered liquid perfusion tube 306, so that the other filter cylinders 200 can still infiltrate and filter the sewage to ensure work efficiency.

[0041] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A coal chemical wastewater treatment device, comprising a housing assembly (100), wherein a plurality of filter cartridges (200) are arranged in a linear array within the housing assembly (100), characterized in that: A connecting cylinder (301) is installed between the two filter cylinders (200); a plurality of blocking blocks (302) are provided in an annular shape on the connecting cylinder (301); a concentrated liquid flow-through port (303) is retained between every two blocking blocks (302); a filtered liquid flow-through tube (304) is provided on the connecting cylinder (301); the filtered liquid flow-through tube (304) is coaxially arranged with the connecting cylinder (301); and a concentrated liquid perfusion tube (305) and a filtered liquid perfusion tube (306) are connected between the two connecting cylinders (301); Both ends of the connecting cylinder (301) are coaxially provided with a first sleeve (307) in a rotatably connected manner; a baffle (308) for blocking the concentrated liquid inside the connecting cylinder (301) from flowing out is installed on the first sleeve (307); a first communication port (309) is provided on the first sleeve (307); a second sleeve (311) is slidably installed on the filtrate flow-through tube (304); a second communication port (312) is provided on the filtrate flow-through tube (304); a third communication port (313) is provided on the second sleeve (311); and a fourth communication port (314) coaxial with the second communication port (312) is provided on the blocking block (302).

2. A coal chemical wastewater treatment device according to claim 1, characterized in that: The first sleeve (307) and the second sleeve (311) are both driven by an externally connected driving member (400).

3. A coal chemical wastewater treatment device according to claim 2, characterized in that: The driving member (400) comprises a first telescopic oil cylinder (401) fixedly mounted on a connecting cylinder (301); a connecting rod (402) is hingedly mounted on the first telescopic oil cylinder (401); a gear (403) is fixedly mounted on the first sleeve (307); a hole is penetrated through the connecting cylinder (301) for the gear (403) to pass through; a limit rod (404) is vertically slidably mounted on the housing assembly (100); a toothed plate (405) meshing with the gear (403) is fixedly mounted on the limit rod (404); and the toothed plate (405) and the connecting rod (402) are hingedly mounted.

4. A coal chemical wastewater treatment device according to claim 3, characterized in that: A return spring (406) is disposed around the limiting rod (404).

5. A coal chemical wastewater treatment device according to claim 2, characterized in that: The driving member (400) further comprises a second telescopic push rod (407) arranged inside the blocking block (302); a hydraulic oil pipe (408) is connected between the first hydraulic cylinder and the second telescopic push rod (407); and a connecting block (409) is mounted on the second telescopic push rod (407) for driving the second sleeve (311) to slide.

6. A coal chemical wastewater treatment device according to claim 1, characterized in that: A sealing rubber ring (310) is installed on the first sleeve (307) via a threaded groove. The sealing rubber ring (310) is used to prevent the concentrated liquid from flowing out from the connection between the connecting cylinder (301) and the filter cylinder (200). The sealing rubber ring (310) abuts against the inner side of the connecting cylinder (301).

7. A coal chemical wastewater treatment device according to claim 1, characterized in that: The housing assembly (100) comprises a lower membrane shell (101) and an upper membrane shell (102); a plurality of upper membrane shells (102) are arranged in an array on the lower membrane shell (101); and the upper membrane shell (102) is clamped onto the lower membrane shell (101) via a clamping member (103).

8. A coal chemical wastewater treatment device according to claim 7, characterized in that: The lower membrane shell (101) is provided with a sewage discharge pipe (104).

Images