Sewage cleaning device based on chemical wastewater discharge treatment

By using a rotating filter cartridge design and gas backflushing technology, the problems of low filtration efficiency and inconvenient cleaning in chemical wastewater filtration devices have been solved, achieving efficient and automated solid sludge cleaning and improving the operational stability and convenience of the equipment.

CN223592428UActive Publication Date: 2025-11-25周生龙
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Patent Information

Application Number
CN202422970269.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2025-11-25
Estimated Expiration
2034-12-03

AI Technical Summary

Technical Problem

Existing chemical wastewater filtration devices suffer from low filtration efficiency, easy clogging of filter holes, and inconvenient cleaning. In particular, the solid residue blockage inside the filter tank is severe, affecting the filtration effect and equipment operation.

Method used

The filter cartridge adopts a rotary filter design, combined with a rotary drive component, a single/dual switching air supply and unblocking component, and a rotary support slag discharge component, to achieve rotary fast filtration and automatic unblocking of the filter cartridge. It uses gas backflushing to clean the filter holes and automatically discharges solid slag through the rotary support slag discharge component.

Benefits of technology

It improves filtration efficiency and flow, simplifies the solid residue cleaning process, achieves automated and rapid cleaning, and reduces the tedium of manual operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a sewage cleaning device based on chemical wastewater discharge treatment, which comprises a treatment box and a filter cartridge hermetically and rotatably embedded on the inner wall of the left side of the treatment box, the side wall of the filter cartridge is provided with a plurality of filter holes positioned in the treatment box, and the left side of the outer side of the filter cartridge is fixedly sleeved with a rotary driving component for driving the filter cartridge to rotate; a dredging solid slag blowing and discharging mechanism is mounted on the filter cartridge, and a sewage inlet valve is fixedly arranged in the dredging solid slag blowing and discharging mechanism in a sleeving manner. According to the utility model, a series of structures are arranged, so that the filter cartridge can be conveniently driven to rotate to swing sewage for rotary quick filtration, the filtration efficiency is improved, filter holes of the filter cartridge can be integrally, automatically and effectively subjected to back flushing, cleaning and dredging during filtration, the filtration smoothness is improved, and personnel can be assisted in automatically and quickly cleaning and discharging filtered impurities after use; and the operation is simple and convenient, and the slag removal and discharge convenience is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical wastewater, specifically to a sewage cleaning device based on chemical wastewater discharge treatment. BACKGROUND

[0002] Coal chemical wastewater refers to wastewater generated in the coal chemical production process. Since the coal chemical wastewater contains a large amount of suspended particles and other solid residues, direct discharge will cause serious pollution to the environment. The solid residues in part of the wastewater may cause wear or blockage to subsequent treatment equipment, affecting the normal operation of the equipment. High concentration of pollutants will greatly increase the treatment pressure of the wastewater treatment plant, resulting in a decrease in treatment efficiency, and even unable to meet the discharge standard. In order to alleviate this problem, the prior art will first perform a pre-interception treatment. Through pre-interception and cleaning, most of the suspended solids and part of the solid residue organic matter can be removed, reducing the treatment pressure of the subsequent treatment plant. In the current pre-interception process, the commonly used interception equipment usually uses a filter screen. The working principle of the filter screen is to intercept solid particles, suspended solids, etc. in the wastewater by using its pore size. However, the filter screen often has the phenomenon of easy blockage.

[0003] In this regard, the publication number CN212700784U discloses a chemical wastewater filtration device convenient to clean, which includes a box body, an inlet, and an outlet. The top end of the box body is installed with an inlet pipe on one side. The bottom end of the box body is installed with an outlet pipe. It also includes a filter mechanism fixedly installed in the inner cavity of the box body and a detachable mechanism installed at the bottom end of the filter mechanism. The chemical wastewater filtration device convenient to clean can filter the wastewater through the filter barrel and the filter screen. The motor can rotate to drive the stirring rod to rotate, which can stir the wastewater. The brush can clean the inner wall of the filter barrel. Moving the handle inward can drive the clamping block to move out of the inner cavity of the clamping groove. Moving downward can detach the bottom plate from the filter barrel. The device can conveniently clean the filter barrel, which is relatively simple. It avoids affecting the filtration effect due to the blockage of the filter barrel and the filter screen, and ensures the normal use of the device.

[0004] The above-mentioned technical disclosure of a chemical wastewater filtration device convenient to clean can filter and intercept the suspended solids and other solid residues in the wastewater through the filter barrel. The rotating brush inside can brush and clean the inside of the filter barrel, which can reduce the phenomenon of blockage of the filter barrel by stationary solid residues during use, and improve the filtration efficiency. However, the following deficiencies still exist during use:

[0005] 1. The filtering bucket is in a static filtering mode, the filtering efficiency is low, and only the inside surface of the filtering bucket can be brushed and cleaned, but the impurities stuck in the filtering holes of the filtering bucket cannot be effectively cleaned and dredged, and the phenomenon of solid residue stuck in the filtering holes of the filtering bucket leading to poor filtering still exists; 2. After use, personnel need to disassemble the front side and disassemble the structure at the bottom of the filtering bucket to clean and remove impurities, which is complicated to operate, lacks a structure for automatically and quickly cleaning and discharging the filtered impurities after use, and the convenience of discharging residue is not ideal; In view of this, the sewage cleaning device based on chemical wastewater discharge treatment is proposed to solve the above problems. Utility model content

[0006] The utility model discloses a sewage cleaning device based on chemical wastewater discharge treatment to solve the problems in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical scheme: a sewage cleaning device based on chemical wastewater discharge treatment, including the treatment box and the filter cartridge of sealing rotation embedding on the left side inner wall of the treatment box, a plurality of filter holes that are all located in the treatment box are formed on the lateral wall of the filter cartridge, and the left side of the outer side of the filter cartridge is fixedly sleeved with a rotary drive assembly for driving the filter cartridge to rotate;

[0008] The filter cartridge is provided with a dredging solid residue blowing and discharging mechanism, a sewage inlet valve is fixedly sleeved in the dredging solid residue blowing and discharging mechanism, the dredging solid residue blowing and discharging mechanism comprises an annular pipe that is sealingly rotatably sleeved in the filter cartridge, the annular pipe is fixedly sleeved on the outer side of the water outlet of the sewage inlet valve, a plurality of horizontal blowholes are annularly formed on the right side of the annular pipe, and a single-double switching air supply dredging assembly for dredging the filter holes and supplying air into the annular pipe is installed on the treatment box; the single-double switching air supply dredging assembly is used for back blowing and dredging the plurality of filter holes when the filter cartridge rotates, and is used for supplying air into the annular pipe to perform bidirectional aeration work after use, so that the supplied air is blown to the right through the plurality of horizontal blowholes, and the effect of blowing and discharging the solid residue in the filter cartridge to the right is achieved.

[0009] The right side inner wall of the treatment box is fixedly embedded with a rotary support residue discharging assembly for supporting the right end of the filter cartridge and discharging the solid residue; the rotary support residue discharging assembly is used for supporting the rotation of the filter cartridge and discharging the solid residue when blowing and discharging after use.

[0010] Preferably, the rotary drive assembly comprises an outer gear ring fixedly sleeved on the left side of the outer side of the filter cartridge, the bottom of the outer gear ring is engaged with a gear, and a drive motor with an output shaft is fixedly installed on the left side of the treatment box and is fixedly connected with the left side of the gear.

[0011] Preferably, the single-double switching air supply dredging assembly comprises a horizontal pipe fixedly connected to the right inner wall of the treatment box, a plurality of blow cleaning heads located above the filter cartridge are fixedly communicated to the bottom of the horizontal pipe, an air outlet is fixedly installed at the top left of the treatment box, an air pump is fixedly communicated to the top of the horizontal pipe, the left end of the horizontal pipe extends to the outside of the treatment box and is fixedly communicated with a first valve, and one end of the first valve is fixedly communicated with the left top of the annular pipe.

[0012] Preferably, the rotating branch slag discharging assembly comprises a support pipe fixedly embedded to the right inner wall of the treatment box, the right end inner wall of the support pipe is provided as an inclined surface, a support box with an opening provided at the left side is fixedly sleeved to the outer side of the support pipe, the support box is sealingly rotatably sleeved to the filter cartridge, the left end of the support pipe is in movable contact with the right side of the filter cartridge, a discharging valve is fixedly communicated to the bottom of the support pipe, and a slag receiving box is placed below the discharging valve at the right side of the treatment box.

[0013] Preferably, an activated carbon filter plate is fixedly installed below the filter cartridge in the treatment box, the bottom inside of the treatment box is provided as an inclined surface, and a drain valve is fixedly communicated to the left bottom of the treatment box.

[0014] Preferably, a circular perforation is formed in the left inner wall of the treatment box, a first sealing bearing is fixedly sleeved in the circular perforation, and the inner ring of the first sealing bearing is fixedly sleeved to the outer side of the filter cartridge.

[0015] Preferably, two second sealing bearings are fixedly sleeved in the filter cartridge, and the inner rings of the second sealing bearings are fixedly sleeved to the outer side of the annular pipe.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The filter cartridge, filter hole, rotating drive assembly, activated carbon filter plate, treatment box and drain valve are cooperated, the filter cartridge is driven to rotate to rotate and filter the sewage, the filtering efficiency is improved compared with static filtering.

[0018] 2. The single-double switching air supply dredging assembly, filter cartridge and filter hole are cooperated, the filter hole of the filter cartridge is automatically and effectively back-flushed to dredge, the phenomenon that the filter hole is blocked by solid slag and floating objects is reduced, and the filtering smoothness is improved.

[0019] 3. The single-double switching air supply dredging assembly, filter cartridge, rotating branch slag discharging assembly, annular pipe and horizontal blow hole are cooperated, the filter hole is back-flushed to dredge, the solid slag is blown to the right, the solid slag is directly discharged and collected, the impurities filtered are automatically and quickly cleaned and discharged by the auxiliary personnel after use, the impurities are not manually removed, the operation is simple, and the convenience of slag cleaning and discharging is improved.

[0020] The utility model discloses a series of structure are set up, and the filter drum is rotated conveniently to the sewage swing and is rotated fast filter, improves the filtering efficiency, and can be integrated automatic effective to the filter hole of filter drum back blow cleaning dredging when filtering, improves the filtering smoothness, and can be after use auxiliary personnel automatic fast to the impurity of filtering cleaning discharge, need not personnel manual disassembly and clean and remove the impurity, simple operation improves the convenience of slag discharge. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a kind of based on chemical wastewater discharge treatment's sewage cleaning device structure schematic view;

[0022] Figure 2 For Figure 1 Right view structure schematic view;

[0023] Figure 3 A kind of based on chemical wastewater discharge treatment's sewage cleaning device main view cross-sectional structure schematic view is proposed in the utility model;

[0024] Figure 4 A kind of based on chemical wastewater discharge treatment's sewage cleaning device annular tube three-dimensional structure schematic view is proposed in the utility model.

[0025] In the drawing: 1, processing box;101, activated carbon filter plate;2, filter drum;201, filter hole;3, support tube;301, support box;302, discharge valve;4, drive motor;401, gear;402, outer gear ring;5, annular tube;501, transverse blowhole;502, first valve;503, cross pipe;504, blow head;505, air pump;6, sewage inlet valve. DETAILED DESCRIPTION

[0026] The technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of the utility model protection.

[0027] As Figures 1 to 4As shown, the sewage cleaning device based on chemical wastewater discharge treatment provided by the embodiment comprises a treatment box 1 and a filter cartridge 2 sealingly and rotatably embedded in the left inner wall of the treatment box 1, wherein a circular perforation is formed in the left inner wall of the treatment box 1, a first sealing bearing is fixedly sleeved in the circular perforation, and the inner ring of the first sealing bearing is fixedly sleeved with the outer side of the filter cartridge 2, thereby achieving the effect of sealingly and rotatably mounting the filter cartridge 2; a plurality of filter holes 201 located in the treatment box 1 are formed in the side wall of the filter cartridge 2, and a rotary driving assembly for driving the filter cartridge 2 to rotate is fixedly sleeved with the outer left side of the filter cartridge 2.

[0028] A solid residue dredging and blowing mechanism is mounted on the filter cartridge 2, a sewage inlet valve 6 is fixedly sleeved in the solid residue dredging and blowing mechanism, the solid residue dredging and blowing mechanism comprises an annular pipe 5 sealingly and rotatably sleeved in the filter cartridge 2, two second sealing bearings are fixedly sleeved in the filter cartridge 2, the inner ring of the second sealing bearing is fixedly sleeved with the outer side of the annular pipe 5, thereby achieving the effect of sealingly and rotatably mounting the filter cartridge 2 on the inner side, and the rotary connection mode is used, so that the rotary torque is not transmitted to the annular pipe 5 when the filter cartridge 2 rotates, thereby facilitating the maintenance of the annular pipe 5, the annular pipe 5 is fixedly sleeved on the outer side of the water outlet of the sewage inlet valve 6, a plurality of horizontal blowing holes 501 are annularly formed in the right side of the annular pipe 5, a single-double switching air supply dredging assembly for dredging the filter holes 201 and supplying air into the annular pipe 5 is mounted on the treatment box 1, an activated carbon filter plate 101 located below the filter cartridge 2 is fixedly installed in the treatment box 1, the bottom of the treatment box 1 is internally provided as an inclined surface, and a drainage valve is fixedly communicated with the left bottom of the treatment box 1; the single-double switching air supply dredging assembly is used for back blowing and dredging the plurality of filter holes 201 when the filter cartridge 2 rotates, and is used for supplying air into the annular pipe 5 for bidirectional aeration work after use, the air supplied into the annular pipe 5 is blown to the right through the plurality of horizontal blowing holes 501, thereby achieving the effect of blowing and discharging the solid residue in the filter cartridge 2 to the right, and the activated carbon filter plate 101 is used for further adsorbing and purifying the sewage after filtering the solid residue, and the drainage valve is used for connecting with the external sewage discharge pipeline to discharge the filtered and purified sewage;

[0029] A rotary support and residue discharging assembly for supporting and discharging the solid residue is fixedly embedded on the right inner wall of the treatment box 1; the rotary support and residue discharging assembly is used for supporting the filter cartridge 2 to rotate, and is used for discharging the solid residue when blowing and discharging after use.

[0030] Specifically, the rotating drive assembly comprises an outer gear ring 402 fixedly sleeved on the left side of the filter cartridge 2, the bottom of the outer gear ring 402 is engaged with a gear 401, and a driving motor 4 is fixedly installed on the left side of the treatment box 1 and fixedly connected with the left side of the gear 401; the outer gear ring 402, the gear 401 and the driving motor 4 are cooperated, the driving motor 4 is used to drive the gear 401 to rotate, the gear 401 drives the outer gear ring 402 to rotate, the rotation of the outer gear ring 402 is used to drive the filter cartridge 2 to rotate, the rotation of the filter cartridge 2 is used to realize the rotating and fast filtering work of sewage swinging, and the filter cartridge 2 filters and intercepts the solid residue on the inner side, compared with the static filtering, the filtering efficiency is improved.

[0031] Further, the single-double switching air supply and dredging assembly comprises a cross pipe 503 fixedly connected to the inner wall on the right side of the treatment box 1, a plurality of blow cleaning heads 504 located above the filter cartridge 2 are fixedly communicated at the bottom of the cross pipe 503, an air outlet is fixedly installed on the top left side of the treatment box 1 and fixedly communicated with the top of the cross pipe 503, and a gas pump 505 is fixedly communicated with the cross pipe 503; one end of a first valve 502 is fixedly communicated with the left top of the annular pipe 5; the cross pipe 503, the blow cleaning head 504, the gas pump 505 and the first valve 502 are cooperated, the gas pump 505 is used to supply air into the cross pipe 503, the gas is blown downward through the plurality of blow cleaning heads 504 to gradually blow and clean the plurality of filter holes 201 on the rotating filter cartridge 2, the phenomenon that the solid residue floating objects are blocked in the filter holes 201 to cause the unsmooth phenomenon is reduced, in addition, the personnel opens the first valve 502 after the filtering is used, at this time, part of the gas in the cross pipe 503 is shunted to the annular pipe 5 through the first valve 502, and then is blown right through the plurality of horizontal blow holes 501, under the integrated action of the horizontal blowing and the blow dredging, the solid residue is moved right under the action of the gas blown right, and the effect that the solid residue filtered in the filter cartridge 2 is blown and discharged right is realized.

[0032] Furthermore, the slag discharge assembly includes a support tube 3 embedded and fixed on the inner wall of the right side of the treatment box 1. The inner wall of the right end of the support tube 3 is set as an inclined surface. A support box 301 with an opening on the left side is fixedly sleeved on the outer side of the support tube 3. The support box 301 is rotatably and sealed on the filter cartridge 2. A third sealing bearing is fixedly sleeved inside the support box 301. The inner ring of the third sealing bearing is fixedly sleeved with the outer side of the filter cartridge 2, which achieves the effect of sealing and rotating the right end of the filter cartridge 2. The left end of the support tube 3 is in movable contact with the right side of the filter cartridge 2. The bottom of the support tube 3... The part is connected and fixed with a discharge valve 302. A slag receiving box is placed on the right side of the treatment box 1 below the discharge valve 302. The set support pipe 3, support box 301, discharge valve 302 and slag receiving box cooperate. When the slag is blown out after use, the personnel open the discharge valve 302. At this time, when the solid slag is blown to the right into the support pipe 3, it slides down along the inclined surface of the inner wall of its right end and is discharged downward from the discharge valve 302 along with the gas. After being discharged, it falls and is collected in the slag receiving box, realizing the effect of discharging and collecting solid slag during the blown out after use.

[0033] The usage method of this embodiment is as follows: When in use, connect the sewage inlet valve 6 to the external chemical wastewater discharge pipe to allow the sewage to flow into the filter cartridge 2. The sewage is then filtered out through the filter holes 201 and discharged into the treatment tank 1. After being further adsorbed and purified by the activated carbon filter plate 101, it is discharged through the drain valve. The filter cartridge 2 filters and intercepts solid residue on its inner side, achieving the effect of pre-filtration treatment of solid residue in the sewage. The designated sewage discharge work can be carried out by connecting the drain valve to the external sewage discharge pipe or other treatment equipment supply pipe.

[0034] During filtration, the air pump 505 and drive motor 4 are activated. The output shaft of drive motor 4 drives gear 401 to rotate, and gear 401 drives external gear ring 402 to rotate. The rotation of external gear ring 402 drives filter cartridge 2 to rotate. The rotation of filter cartridge 2 enables the wastewater to be spun around for rapid filtration, which improves filtration efficiency compared to static filtration. When the air pump 505 is started, it supplies air into the horizontal pipe 503. The air is blown downward through multiple cleaning heads 504 to gradually back-blow and clean the multiple filter holes 201 on the rotating filter cartridge 2. This achieves an integrated, automatic and effective cleaning and unblocking effect on the filter holes 201 of filter cartridge 2 during filtration, reducing the blockage caused by solid sludge and floating matter in the filter holes 201 and improving filtration smoothness.

[0035] When the residue needs to be discharged after filtration, the personnel opens the first valve 502 and the discharge valve 302, at this time, while continuing to supply gas to the inside of the horizontal pipe 503, part of the gas in the horizontal pipe 503 is shunted to the annular pipe 5 through the first valve 502, and then is blown to the right through the plurality of horizontal blow holes 501, under the integrated action of horizontal blowing and reverse blowing dredging, the solid residue is moved to the right under the action of the right horizontal blowing of the gas, the solid residue is blown to the right to the supporting pipe 3, slides down along the inclined surface of the right end inner wall, and is discharged downward from the discharge valve 302 following the discharge of the gas, and after being discharged, falls and is collected into the residue receiving box, achieving the effect of automatically and quickly cleaning and discharging the filtered impurities by the auxiliary personnel after use, without manually disassembling to clean and remove the impurities, the operation is simple, and the convenience of cleaning and discharging residue is improved.

[0036] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sewage cleaning device based on chemical wastewater discharge treatment, comprising a treatment box (1) and a filter cartridge (2) sealingly and rotatably embedded in the left side inner wall of the treatment box (1), characterized in that: The side wall of the filter cartridge (2) is provided with a plurality of filter holes (201) located in the treatment box (1), and the outer left side of the filter cartridge (2) is fixedly sleeved with a rotating driving assembly for driving the filter cartridge (2) to rotate; A solid residue blowing mechanism is mounted on the filter cartridge (2), a sewage inlet valve (6) is fixedly sleeved in the solid residue blowing mechanism, the solid residue blowing mechanism comprises an annular pipe (5) which is sealingly sleeved in the filter cartridge (2), the annular pipe (5) is fixedly sleeved outside the water outlet of the sewage inlet valve (6), a plurality of transverse blowing holes (501) are formed in the right side of the annular pipe (5) in an annular shape, and a single-double switching air supply and blowing assembly is mounted on the treatment box (1) and used for supplying air to the annular pipe (5) and blowing the filter holes (201). A rotating support and residue discharging assembly is embedded and fixed on the right inner wall of the treatment box (1) and used for rotatingly supporting the right end of the filter cartridge (2) and discharging solid residues.

2. The sewage cleaning device based on chemical wastewater discharge treatment according to claim 1, characterized in that: The rotating driving assembly comprises an outer gear ring (402) fixedly sleeved outside the left side of the filter cartridge (2), the bottom of the outer gear ring (402) is engaged with a gear (401), and a driving motor (4) is fixedly installed on the left side of the treatment box (1) and fixedly connected with the left side of the gear (401).

3. The device for cleaning sewage based on the treatment of chemical wastewater discharge according to claim 1, characterized by the fact that it comprises: The single-double switching air supply and blowing assembly comprises a transverse pipe (503) fixedly connected to the right inner wall of the treatment box (1), a plurality of blowing heads (504) located above the filter cartridge (2) are fixedly communicated at the bottom of the transverse pipe (503), an air pump (505) is fixedly installed at the top left side of the treatment box (1) and fixedly communicated with the top of the transverse pipe (503), the left end of the transverse pipe (503) extends to the outside of the treatment box (1) and is fixedly communicated with a first valve (502), and one end of the first valve (502) is fixedly communicated with the left top of the annular pipe (5).

4. The device for cleaning sewage based on the treatment of chemical wastewater discharge according to claim 1, characterized by the fact that it comprises: The rotating support and residue discharging assembly comprises a support pipe (3) embedded and fixed on the right inner wall of the treatment box (1), the right end inner wall of the support pipe (3) is provided as an inclined surface, a support box (301) with an opening provided on the left side is fixedly sleeved outside the support pipe (3), the support box (301) is sealingly sleeved on the filter cartridge (2), the left end of the support pipe (3) is movably contacted with the right side of the filter cartridge (2), a discharging valve (302) is fixedly communicated at the bottom of the support pipe (3), and a residue receiving box is placed on the right side of the treatment box (1) and located below the discharging valve (302).

5. The device for cleaning sewage based on the treatment of chemical wastewater discharge according to claim 1, characterized by the fact that it comprises: An activated carbon filter plate (101) is fixedly installed in the treatment box (1) and located below the filter cartridge (2), the bottom of the treatment box (1) is provided as an inclined surface, and a drainage valve is fixedly communicated at the left bottom of the treatment box (1).

6. The device for cleaning sewage based on the treatment of chemical wastewater discharge according to claim 1, characterized by the fact that it comprises: A circular perforation is formed in the left inner wall of the treatment box (1), a first sealing bearing is fixedly sleeved in the circular perforation, and the inner ring of the first sealing bearing is fixedly sleeved with the outer side of the filter cartridge (2).

7. A sewage cleaning device based on chemical wastewater discharge treatment according to claim 1, characterized in that: Two second sealing bearings are fixedly sleeved in the filter cartridge (2), and the inner rings of the second sealing bearings are fixedly sleeved with the outer side of the annular pipe (5).

Citation Information

Patent Citations

  • Chemical sewage filtering device convenient to clean

    CN212700784U