A sewage treatment device with hollow fiber biofilm

Abstract

The invention discloses a sewage treatment device with a hollow fiber biofilm, which belongs to the technical field of sewage treatment and comprises a primary filter box, a first hydraulic rod is fixedly installed on the inner cavity side wall of the primary filter box, a first push plate is fixedly installed on the end of the first hydraulic rod that is not connected to the primary filter box, a primary filter screen is arranged in the bottom wall opening of the primary filter box, angle irons are welded to the four corners of the bottom surface of the primary filter box, the four angle irons are commonly connected to a collecting box, a water suction pipe is welded to the bottom end of the side wall of the collecting box, the water suction pipe is fixedly connected to a secondary filter box, a second hydraulic rod is fixedly installed on the inner cavity side wall of the secondary filter box away from the water suction pipe, a second push plate is fixedly installed on the end of the second hydraulic rod that is not connected to the secondary filter box, a filter frame with a hollow fiber biofilm is plugged into one end of the secondary filter box connected to the water suction pipe, and the sewage treatment device with the hollow fiber biofilm is provided with a hollow fiber biofilm that is easy to replace, thereby ensuring the water quality after sewage treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, in particular to a sewage treatment device with a hollow fiber biofilm. Background Art

[0002] Sewage generated in the process of human life is one of the main sources of water pollution, which mainly includes feces and washing sewage. The amount of domestic sewage discharged per person per day in cities is 150L~400L, and its amount is closely related to the living standard. Domestic sewage contains a large amount of organic matter, such as cellulose, starch, sugar, fat protein, etc.; it also often contains pathogens, viruses and parasite eggs; inorganic salts such as chlorides, sulfates, phosphates, bicarbonates and sodium, potassium, calcium, magnesium, and a small amount of heavy metals.

[0003] With the development of membrane separation technology, membranes are more and more widely used in the field of water treatment, and membrane bioreactors are increasingly used in the fields of urban sewage treatment, small-scale decentralized sewage treatment, industrial wastewater treatment, etc. At present, hollow fiber biofilms are widely used. With the increase of operating time, part of the membrane cortex on the surface of the hollow fiber biofilm is easy to fall off under the combined action of flushing and backwashing, resulting in a decrease in the filtration performance of the hollow fiber biofilm, which in turn causes the suspended matter in the produced water to exceed the standard. For example, a method for the comprehensive utilization of an abandoned reinforced hollow fiber membrane with a lining (Application Publication No. CN114588784A) also mentions similar problems. Therefore, a new type of sewage treatment device with a hollow fiber biofilm is needed. Summary of the invention

[0004] The object of the present invention is to provide a sewage treatment device with a hollow fiber biomembrane to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sewage treatment device with a hollow fiber biofilm, comprising a primary filter box, a first hydraulic rod is fixedly installed on the inner cavity side wall of the primary filter box, a first push plate is fixedly installed on the end of the first hydraulic rod that is not connected to the primary filter box, a primary filter screen is arranged in the bottom wall opening of the primary filter box, angle irons for support are welded at the four corners of the bottom surface of the primary filter box, and the four angle irons are commonly connected to a collection box for temporarily collecting wastewater;

[0006] A suction pipe is welded to the bottom end of the side wall of the collecting box, and the suction pipe is fixedly connected to a re-filter box. A second hydraulic rod is fixedly installed on the inner cavity side wall of the re-filter box away from the suction pipe, and a second push plate is fixedly installed on the end of the second hydraulic rod that is not connected to the re-filter box. A filter frame with a hollow fiber biomembrane is inserted into the end of the re-filter box connected to the suction pipe, and the side of the hollow fiber biomembrane close to the suction pipe is a chamber to be filtered, and the other side of the hollow fiber biomembrane is a clean water chamber. The bottom end of the chamber to be filtered is connected to a sewage pipe, and the bottom end of the clean water chamber is connected to a clean water pipe.

[0007] Preferably, a drain pipe for discharging solid waste is welded at the bottom of the side wall of the primary filter box away from the first hydraulic rod, and a fourth solenoid valve is provided on the drain pipe. A water inlet pipe with a connecting flange is welded at the top of the primary filter box away from the first hydraulic rod, and a third solenoid valve is provided on the water inlet pipe.

[0008] Preferably, a first rubber plug is bonded to a side of the first push plate away from the first hydraulic rod, a funnel for collecting sewage is fixedly connected to an opening on the bottom wall of the primary filter box, and a second rubber plug is bonded to a side of the second push plate away from the second hydraulic rod.

[0009] Preferably, two limiting rings for limiting the position of the filter frame are welded to the inner cavity of the re-filter box, and a handle for facilitating lifting the filter frame is fixedly installed on the top of the filter frame.

[0010] Preferably, rubber pads are bonded to both sides of the filter frame, and the two rubber pads are used to seal the gap between the filter frame and the limiting ring.

[0011] Preferably, the top wall of the re-filter box is provided with a through slot for inserting the filter frame, and rotating seats are provided at both ends of the through slot, and the rotating seats are welded to the upper surface of the re-filter box, and the two rotating seats are rotatably connected to the rotating frames.

[0012] Preferably, the two rotating frames are both threadedly connected with screws, the bottom ends of the two screws are fixedly connected with a pressing block for pressing the filter frame, and the top ends of the two screws are coaxially fixedly connected with a turntable for facilitating the rotation of the screws.

[0013] Preferably, a first one-way valve is provided on the water suction pipe, a first solenoid valve is provided on the sewage pipe, and a second solenoid valve and a second one-way valve are provided on the clean water pipe.

[0014] Compared with the prior art, the technical effects and advantages of the present invention are as follows:

[0015] The sewage treatment device with hollow fiber biofilm, when in use, the fourth solenoid valve is closed, the water inlet pipe is connected to the sewer pipe, and the sewage to be treated is added to the primary filter box, then the third solenoid valve is closed, the first hydraulic rod pushes the first push plate to squeeze the sewage in the primary filter box, the sewage is filtered through the primary filter net and then flows into the collection box through the funnel, and the solid waste remains in the primary filter box. At this time, the first push plate only moves above the primary filter net. When there is a lot of solid waste in the primary filter box, the fourth solenoid valve is opened, and the first hydraulic rod pushes the first push plate to squeeze the solid waste in the primary filter box. At this time, the first rubber plug on the first push plate moves to the side wall of the primary filter box connected to the sewage pipe, and the solid waste is squeezed out from the sewage pipe, and the solid waste is initially filtered out, thereby reducing the probability of blockage of the hollow fiber biofilm in subsequent use;

[0016] When the sewage treatment device with the hollow fiber biofilm is used, the first solenoid valve is closed, the second solenoid valve is opened, the second hydraulic rod is contracted, and the second push plate moves toward the second hydraulic rod, so that the first one-way valve is opened and the second one-way valve is closed, and then the filter box draws the sewage after the initial filtration from the collection box through the suction pipe. At this time, the sewage after the initial filtration enters the chamber to be filtered, and then enters the clean water chamber after being filtered through the hollow fiber biofilm. Then the second hydraulic rod is extended to push the second push plate to squeeze the clean water chamber, so that the first one-way valve is closed and the second one-way valve is opened, and the clean water after filtration is discharged from the clean water pipe. When too much impurities accumulate in the chamber to be filtered, the first solenoid valve is opened and the second solenoid valve is closed when the second push plate squeezes the clean water chamber, so that the sewage mixed with impurities can be discharged through the sewage pipe, and the hollow fiber biofilm is backwashed at the same time, thereby extending the service life of the hollow fiber biofilm;

[0017] The sewage treatment device with hollow fiber biomembrane, when the hollow fiber biomembrane needs to be replaced, the turntable is rotated to make the screw move upward as much as possible, and then the rotating frame is rotated away from the handle, and then the filter frame with the hollow fiber biomembrane is pulled out by the handle, and after the new filter frame with the hollow fiber biomembrane is inserted, the rotating frame is rotated back to the original position, and the screw of the rotating turntable is moved downward, so that the pressing block presses the filter frame to complete the replacement of the hollow fiber biomembrane. The hollow fiber biomembrane that is easy to replace is provided, the filtration performance of the hollow fiber biomembrane is kept stable, and the water quality after sewage treatment is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1It is a schematic diagram of the overall structure of one side of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the other side of an embodiment of the present invention;

[0021] Figure 3 It is a top view of the primary filter box according to an embodiment of the present invention;

[0022] Figure 4 For the present invention Figure 3 A cross-sectional view of the embodiment along the AA direction;

[0023] Figure 5 A top view of the re-filter box according to an embodiment of the present invention;

[0024] Figure 6 For the present invention Figure 5 A cross-sectional view of the embodiment along the BB direction;

[0025] Figure 7 This is a schematic diagram of the structure of a limit ring according to an embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the hollow fiber biofilm, rubber pad, handle, rotating seat, rotating frame, screw, rotating disk and pressing block in an embodiment of the present invention;

[0027] Fig. 9 It is a schematic structural diagram of a rotating frame according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] In the figure: 1. primary filter box; 2. water inlet pipe; 3. first hydraulic rod; 4. first push plate; 5. first rubber plug; 6. primary filter screen; 7. funnel; 8. angle iron; 9. collection box; 10. suction pipe; 11. first non-return valve; 12. secondary filter box; 13. second hydraulic rod; 14. second push plate; 15. second rubber plug; 16. limit ring; 17. filter frame; 18. hollow fiber biofilm; 19. rubber pad; 20. handle; 21. rotating seat; 22. rotating frame; 23. screw; 24. turntable; 25. pressing block; 26. sewage pipe; 27. first solenoid valve; 28. clean water pipe; 29. ​​second solenoid valve; 30. second non-return valve; 31. chamber to be filtered; 32. clean water chamber; 33. third solenoid valve; 34. sewage pipe; 35. fourth solenoid valve. DETAILED DESCRIPTION

[0030] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0031] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0032] In order to ensure the water quality after sewage treatment, Figures 1 to 9 The sewage treatment device with a hollow fiber biomembrane shown in the figure is provided with a hollow fiber biomembrane that is easy to replace, and the filtration performance of the hollow fiber biomembrane is kept stable. The hydraulic rod, solenoid valve and one-way valve are existing technologies and have nothing to do with the innovation of this case. They are not elaborated here. It includes a primary filter box 1, a first hydraulic rod 3 is fixedly installed on the inner cavity side wall of the primary filter box 1, a first push plate 4 is fixedly installed on the end of the first hydraulic rod 3 that is not connected to the primary filter box 1, and a first rubber plug 5 is bonded to the side of the first push plate 4 away from the first hydraulic rod 3. A sewage pipe 34 for discharging solid waste is welded to the bottom of the side wall of the primary filter box 1 away from the first hydraulic rod 3, and a fourth solenoid valve 35 is arranged on the sewage pipe 34, an inlet pipe 2 with a connecting flange is welded to the top of the primary filter box 1 away from the first hydraulic rod 3, and a third solenoid valve 33 is arranged on the water inlet pipe 2, a primary filter screen 6 is arranged in the bottom wall opening of the primary filter box 1, and the bottom wall opening of the primary filter box 1 A funnel 7 for collecting sewage is fixedly connected to the primary filter box 1. Angle irons 8 for support are welded at the four corners of the bottom surface of the primary filter box 1. The four angle irons 8 are commonly connected to a collection box 9 for temporarily collecting wastewater. When in use, the fourth solenoid valve 35 is closed, the water inlet pipe 2 is connected to the sewer pipe, and the sewage to be treated is added to the primary filter box 1. Then the third solenoid valve 33 is closed, and the first hydraulic rod 3 pushes the first push plate 4 to squeeze the sewage in the primary filter box 1. The sewage is filtered through the primary filter screen 6 and then flows into the collection box 9 through the funnel 7. The solid waste remains in the primary filter box 1. At this time, the first push plate 4 only moves above the primary filter screen 6. When there is a lot of solid waste in the primary filter box 1, the fourth solenoid valve 35 is opened, and the first hydraulic rod 3 pushes the first push plate 4 to squeeze the solid waste in the primary filter box 1. At this time, the first rubber plug 5 on the first push plate 4 moves to the last contact with the side wall of the primary filter box 1 connected to the sewage pipe 34, and the solid waste is squeezed out of the sewage pipe 34.

[0033] A water suction pipe 10 is welded to the bottom end of the side wall of the collecting box 9, and the water suction pipe 10 is fixedly connected to the re-filter box 12. A second hydraulic rod 13 is fixedly installed on the inner cavity side wall of the re-filter box 12 away from the water suction pipe 10, and a second push plate 14 is fixedly installed on the end of the second hydraulic rod 13 that is not connected to the re-filter box 12. A second rubber plug 15 is bonded to the side of the second push plate 14 away from the second hydraulic rod 13. A filter frame 17 with a hollow fiber biofilm 18 is inserted into the end of the re-filter box 12 connected to the water suction pipe 10. The side of the hollow fiber biofilm 18 close to the water suction pipe 10 is a chamber to be filtered 31, and the other side of the hollow fiber biofilm 18 is a clean water chamber 32. The bottom end of the chamber to be filtered 31 is connected to a sewage pipe 26, and the bottom end of the clean water chamber 32 is connected to a clean water pipe 28, and the clean water pipe 28 is arranged close to the filter frame 17. , the inner cavity of the filter box 12 is welded with two limiting rings 16 for limiting the filter frame 17, and the top of the filter frame 17 is fixedly installed with a handle 20 for lifting the filter frame 17, and rubber pads 19 are bonded on both sides of the filter frame 17. The two rubber pads 19 are used to seal the gap between the filter frame 17 and the limiting ring 16, and the top wall of the filter box 12 is provided with a through groove for plugging the filter frame 17, and a rotating seat 21 is provided at both ends of the through groove, and the rotating seat 21 is welded to the upper surface of the filter box 12, and the two rotating seats 21 are rotatably connected to the rotating frame 22, and the two rotating frames 22 are threadedly connected with screws 23, and the bottom ends of the two screws 23 are fixedly connected with a pressing block 25 for pressing the filter frame 17, and the top ends of the two screws 23 are coaxially fixedly connected with a screw 23 for rotating. The rotating disk 24 moves, the first one-way valve 11 is arranged on the suction pipe 10, and the flow direction of the first one-way valve 11 is shown by the arrow in the figure. The sewage pipe 26 is provided with a first solenoid valve 27, and the clean water pipe 28 is provided with a second solenoid valve 29 and a second one-way valve 30. The flow direction of the second one-way valve 30 is shown by the arrow in the figure. When in use, the first solenoid valve 27 is closed, the second solenoid valve 29 is opened, the second hydraulic rod 13 is contracted, and the second push plate 14 moves toward the second hydraulic rod 13, so that the first one-way valve 11 is opened, and the second one-way valve 30 is closed. Then the filter box 12 draws the sewage after the primary filtration from the collection box 9 through the suction pipe 10. At this time, the sewage after the primary filtration enters the filter chamber 31, and then enters the clean water chamber 32 after being filtered by the hollow fiber biofilm 18, and then the second hydraulic The rod 13 is extended, pushing the second push plate 14 to squeeze the clean water chamber 32, so that the first one-way valve 11 is closed and the second one-way valve 30 is opened, and the clean water after filtration is discharged from the clean water pipe 28. When too much impurities accumulate in the filter chamber 31, the first solenoid valve 27 is opened and the second solenoid valve 29 is closed when the second push plate 14 squeezes the clean water chamber 32, and the sewage mixed with impurities can be discharged through the sewage pipe 26, and the hollow fiber biofilm 18 is backwashed at the same time. When the hollow fiber biofilm 18 needs to be replaced, the turntable 24 is rotated to make the screw 23 move upward as much as possible, and then the rotating frame 22 is rotated away from the handle 20, and then the filter frame 17 with the hollow fiber biofilm 18 is pulled out through the handle 20, and a new filter frame 17 with the hollow fiber biofilm 18 is inserted.The rotating frame 22 rotates back to the original position, and the rotating turntable 24 and the screw 23 move downward, so that the pressing block 25 presses the filter frame 17, and the hollow fiber biofilm 18 is replaced.

[0034] How it works

[0035] When the sewage treatment device with hollow fiber biofilm is in use, the fourth solenoid valve 35 is closed, the water inlet pipe 2 is connected to the sewer pipe, and the sewage to be treated is added to the primary filter box 1, then the third solenoid valve 33 is closed, and the first hydraulic rod 3 pushes the first push plate 4 to squeeze the sewage in the primary filter box 1, and the sewage is filtered through the primary filter screen 6 and then flows into the collection box 9 through the funnel 7, and the solid waste remains in the primary filter box 1. At this time, the first push plate 4 only moves above the primary filter screen 6. When there is a lot of solid waste in the primary filter box 1, the fourth solenoid valve 35 is opened, and the third solenoid valve 33 is closed. A hydraulic rod 3 pushes the first push plate 4 to squeeze the solid waste in the primary filter box 1. At this time, the first rubber plug 5 on the first push plate 4 moves to the side wall of the primary filter box 1 connected to the sewage pipe 34, and the solid waste is squeezed out from the sewage pipe 34. When the filter box 12 is used, the first solenoid valve 27 is closed, the second solenoid valve 29 is opened, the second hydraulic rod 13 is contracted, and the second push plate 14 moves toward the second hydraulic rod 13, so that the first check valve 11 is opened, the second check valve 30 is closed, and the filter box 12 is sucked from the collection box 9 through the suction pipe 10. The initially filtered sewage is pumped in. At this time, the initially filtered sewage enters the filter chamber 31, and then enters the clean water chamber 32 after being filtered through the hollow fiber biofilm 18. Then, the second hydraulic rod 13 extends to push the second push plate 14 to squeeze the clean water chamber 32, so that the first one-way valve 11 is closed and the second one-way valve 30 is opened. The filtered clean water is discharged from the clean water pipe 28. When too much impurities accumulate in the filter chamber 31, the first solenoid valve 27 is opened and the second solenoid valve 29 is closed when the second push plate 14 squeezes the clean water chamber 32, and the impurities mixed in the sewage can be discharged through the sewage pipe 26. The hollow fiber biofilm 18 is backwashed while the turntable 24 is rotated. When the hollow fiber biofilm 18 needs to be replaced, the turntable 24 is rotated to make the screw 23 move upward as much as possible, and then the rotating frame 22 is rotated away from the handle 20. Then, the filter frame 17 with the hollow fiber biofilm 18 is pulled out through the handle 20, and a new filter frame 17 with the hollow fiber biofilm 18 is inserted. The rotating frame 22 is rotated back to the original position, and the turntable 24 is rotated. The screw 23 moves downward, so that the pressing block 25 presses the filter frame 17, and the hollow fiber biofilm 18 is replaced.

[0036] It should be noted that, in this document, relational terms such as one and two are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device with a hollow fiber biofilm, comprising a primary filter box (1), characterized in that: A first hydraulic rod (3) is fixedly mounted on the inner cavity side wall of the primary filter box (1); a first push plate (4) is fixedly mounted on the end of the first hydraulic rod (3) that is not connected to the primary filter box (1); a primary filter screen (6) is arranged in the bottom wall opening of the primary filter box (1); angle irons (8) for support are welded at the four corners of the bottom surface of the primary filter box (1); the four angle irons (8) are commonly connected to a collection box (9) for temporarily collecting wastewater; A water suction pipe (10) is welded to the bottom end of the side wall of the collecting box (9), and the water suction pipe (10) is fixedly connected to a re-filter box (12). A second hydraulic rod (13) is fixedly installed on the inner cavity side wall of the re-filter box (12) away from the water suction pipe (10), and a second push plate (14) is fixedly installed on the end of the second hydraulic rod (13) that is not connected to the re-filter box (12). A filter frame (17) with a hollow fiber biofilm (18) is inserted into the end of the re-filter box (12) connected to the water suction pipe (10), and the side of the hollow fiber biofilm (18) close to the water suction pipe (10) is a chamber to be filtered (31), and the other side of the hollow fiber biofilm (18) is a clean water chamber (32). The bottom end of the chamber to be filtered (31) is connected to a sewage pipe (26), and the bottom end of the clean water chamber (32) is connected to a clean water pipe (28).

2. A sewage treatment device with hollow fiber biofilm according to claim 1, characterized in that: A sewage pipe (34) for discharging solid waste is welded to the bottom of the side wall of the primary filter box (1) at one end away from the first hydraulic rod (3), and a fourth solenoid valve (35) is provided on the sewage pipe (34). A water inlet pipe (2) with a connecting flange is welded to the top of the primary filter box (1) at one end away from the first hydraulic rod (3), and a third solenoid valve (33) is provided on the water inlet pipe (2).

3. A sewage treatment device with hollow fiber biofilm according to claim 1, characterized in that: A first rubber plug (5) is bonded to a side of the first push plate (4) away from the first hydraulic rod (3), a funnel (7) for collecting sewage is fixedly connected to the bottom wall opening of the primary filter box (1), and a second rubber plug (15) is bonded to a side of the second push plate (14) away from the second hydraulic rod (13).

4. A sewage treatment device with hollow fiber biofilm according to claim 1, characterized in that: Two limiting rings (16) for limiting the position of the filter frame (17) are welded to the inner cavity of the re-filter box (12), and a handle (20) for facilitating lifting the filter frame (17) is fixedly installed on the top of the filter frame (17).

5. A sewage treatment device with hollow fiber biofilm according to claim 4, characterized in that: Rubber pads (19) are bonded to both sides of the filter frame (17), and the two rubber pads (19) are used to seal the gap between the filter frame (17) and the limiting ring (16).

6. A sewage treatment device with hollow fiber biofilm according to claim 1, characterized in that: The top wall of the re-filter box (12) is provided with a through slot for inserting the filter frame (17), and rotating seats (21) are provided at both ends of the through slot. The rotating seats (21) are welded to the upper surface of the re-filter box (12), and the two rotating seats (21) are both rotatably connected to a rotating frame (22).

7. A sewage treatment device with hollow fiber biofilm according to claim 6, characterized in that: The two rotating frames (22) are both threadedly connected with a screw rod (23), the bottom ends of the two screw rods (23) are both fixedly connected with a pressing block (25) for pressing the filter frame (17), and the top ends of the two screw rods (23) are both coaxially fixedly connected with a rotating disk (24) for facilitating the rotation of the screw rods (23).

8. A sewage treatment device with hollow fiber biofilm according to claim 1, characterized in that: The water suction pipe (10) is provided with a first one-way valve (11), the sewage pipe (26) is provided with a first electromagnetic valve (27), and the clean water pipe (28) is provided with a second electromagnetic valve (29) and a second one-way valve (30).

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