Wastewater nanofiltration pretreatment device

Abstract

The utility model relates to the technical field of nanofiltration equipment, and discloses a wastewater nanofiltration pretreatment device, which structurally comprises nanofiltration equipment, a nanofiltration membrane group and a clamping mechanism, and has the beneficial effects that the clamping mechanism is additionally arranged on the nanofiltration equipment, and the nanofiltration membrane group can be fixed by virtue of movable clamping between a fixing ring and a back side plate; the nanofiltration membrane group can be quickly disassembled and assembled, the replacement efficiency of the nanofiltration membrane is improved, then the handle is rotated to drive the main shaft and the eccentric wheel to rotate, the spring is extruded by means of eccentric motion of the eccentric wheel, the push rod and the arc-shaped plate are ejected out, the nanofiltration membrane group is stably fixed, and the installation stability of the nanofiltration membrane group is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nanofiltration equipment, in particular to a wastewater nanofiltration pretreatment device. Background Art

[0002] When producing chemical products, a large amount of wastewater is usually generated. These wastewaters need to be discharged after biochemical pretreatment to reduce COD and ammonia nitrogen. However, the wastewater needs to be desalinated before entering the biochemical pool. The conventional method used to be desalination by distillation, which is not only time-consuming but also costly. The existing technology usually uses nanofiltration equipment and nanofiltration membranes to carry out desalination pretreatment of various wastewaters.

[0003] Based on the above, nanofiltration is a type of membrane with a lower molecular weight cutoff among separation membranes. It is a water filtration technology that has developed rapidly in recent years. The purpose of the early development of nanofiltration membranes was to replace the conventional softening membranes that use ion exchange to filter impurities in water. However, when existing nanofiltration equipment performs nanofiltration treatment on wastewater, the nanofiltration membrane needs to be replaced after long-term use. However, the installation of existing nanofiltration membranes is usually fixed by bolts, which is very inconvenient during disassembly, which is not only time-consuming and labor-intensive, but also reduces work efficiency. Utility Model Content

[0004] 1. Technical Problems to be Solved by the Utility Model

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a wastewater nanofiltration pretreatment device with the function of being able to quickly and conveniently replace the nanofiltration membrane.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A wastewater nanofiltration pretreatment device comprises a nanofiltration device, a nanofiltration membrane group, a clamping mechanism and a collection box. A plurality of clamping mechanisms are fixed on one side of the nanofiltration device, a plurality of nanofiltration membrane groups are clamped and installed on the clamping mechanisms, and a collection box is provided on one side of the nanofiltration device.

[0009] As an optimization, the nanofiltration device includes a water inlet pipe, a dosing pipe, a permeate pipe and a concentrate pipe. The water inlet pipe and the dosing pipe are connected to the upper end of the nanofiltration membrane group, and the permeate pipe and the concentrate pipe are connected to the bottom end of the nanofiltration membrane group.

[0010] As an optimization, the clamping mechanism includes a back plate, an ejection device, a fixing ring and a snap-in groove. The back plate is fixed to the nanofiltration device. The inside of the back plate is slidably fitted with an ejection device. One end of the back plate is rotatably fitted with a fixing ring. A snap-in groove is provided on one side of the fixing ring.

[0011] As an optimization, a placement groove is provided inside the back side plate, a through hole is provided at the top of the placement groove, clamping grooves are provided on both sides of the through hole, and a buckle is rotatably engaged at one end of the back side plate.

[0012] As an optimization, the buckle is movably engaged with the engaging groove, and the distance between the buckle and the back side plate is equal to the thickness of the engaging groove.

[0013] As an optimization, the ejection device includes an arc plate, a rubber block, a push rod, a spring, a fixed plate and an eccentric piece. The rubber blocks are arrayed on one side of the arc plate close to the nanofiltration membrane group, and the other side of the arc plate is connected to a push rod. A spring is installed on the push rod, and the other end of the spring is connected to the fixed plate. The other side of the push rod is in contact with the eccentric piece.

[0014] As an optimization, the eccentric member includes an eccentric wheel, a main shaft, a hexagonal column, a handle and a fixed block. The top of the eccentric wheel is connected to the main shaft, the top of the main shaft is fixed with a hexagonal column, the hexagonal column is slidably fitted with a handle, and a fixed block is installed at the bottom of the handle.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] (1) The utility model is a wastewater nanofiltration pretreatment device. By adding a clamping mechanism to the nanofiltration equipment, the nanofiltration membrane group can be fixed by means of the movable engagement between the fixing ring and the back plate, so that the nanofiltration membrane group can be quickly disassembled and installed, thereby improving the replacement efficiency of the nanofiltration membrane.

[0018] (2) The utility model is a wastewater nanofiltration pretreatment device, which drives the main shaft and the eccentric wheel to rotate by turning the handle. The eccentric movement of the eccentric wheel squeezes the spring and pushes out the push rod and the arc plate, thereby firmly fixing the nanofiltration membrane group and ensuring the stability of the nanofiltration membrane group installation.

[0019] (3) The utility model is a wastewater nanofiltration pretreatment device, which can increase the friction force in contact with the nanofiltration membrane group through the rubber block, so that the ejection device can fix the nanofiltration membrane group more stably, and the nanofiltration membrane group can be protected by the rubber material to prevent the arc plate from causing damage to the nanofiltration membrane group when clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a wastewater nanofiltration pretreatment device of the utility model;

[0021] Figure 2 This is a schematic diagram of the connection structure of the nanofiltration membrane group of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the clamping mechanism of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the back and side panels of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the ejection device of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the eccentric member of the utility model;

[0026] Figure 7 It is a schematic diagram of the connection structure between the nanofiltration membrane group and the clamping mechanism of the utility model.

[0027] The reference numerals in the figure are: nanofiltration device-1, nanofiltration membrane group-2, clamping mechanism-3, collecting box-4, water inlet pipe-11, dosing pipe-12, permeate pipe-13, concentrate pipe-14, back plate-31, ejection device-32, fixing ring-33, snap-fit ​​groove-34, placement groove-311, through hole-312, slot-313, buckle-314, arc plate-21, rubber block-22, push rod-23, spring-24, fixing plate-25, eccentric piece-26, eccentric wheel-41, main shaft-42, hexagonal column-43, handle-44, fixing block-45. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example:

[0030] See also Figure 1-Figure 7 A wastewater nanofiltration pretreatment device, whose structure includes a nanofiltration device 1, a nanofiltration membrane group 2, a clamping mechanism 3 and a collecting box 4. A plurality of clamping mechanisms 3 are fixed on one side of the nanofiltration device 1, and a plurality of nanofiltration membrane groups 2 capable of performing nanofiltration desalination pretreatment on wastewater are clamped and installed on the clamping mechanisms 3. A collecting box 4 is provided on one side of the nanofiltration device 1.

[0031] In this embodiment, the nanofiltration device 1 includes a water inlet pipe 11, a dosing pipe 12, a permeate pipe 13 and a concentrated liquid pipe 14. The water inlet pipe 11 and the dosing pipe 12 are both connected to the upper end of the nanofiltration membrane group 2, the permeate pipe 13 and the concentrated liquid pipe 14 are connected to the bottom end of the nanofiltration membrane group 2, and can discharge the wastewater concentrate and permeate that have completed the nanofiltration treatment. The other end of the permeate pipe 14 is connected to the collecting box 4, and can discharge the permeate into the collecting box 4 for collection, and after sedimentation, it can be recycled for secondary use.

[0032] In this embodiment, the clamping mechanism 3 includes a back plate 31, an ejection device 32, a fixing ring 33 and a snap-in groove 34. The back plate 31 is fixed to the nanofiltration device 1. The inside of the back plate 31 is slidably fitted with the ejection device 32. One end of the back plate 31 is rotatably fitted with a fixing ring 33 that can fix the nanofiltration membrane group 2 through a rotating shaft. A snap-in groove 34 is provided on one side of the fixing ring 33.

[0033] In this embodiment, a placement groove 311 is opened inside the back plate 31, and the ejection device 32 is located in the placement groove 311. A through hole 312 penetrating the back plate 31 is opened at the top of the placement groove 311, and slots 313 located on the back plate 31 are provided on both sides of the through hole 312. One end of the back plate 31 is rotatably engaged with a buckle 314.

[0034] In this embodiment, the buckle 314 is movably engaged with the engaging groove 34, and the distance between the buckle 314 and the back plate 31 is equal to the thickness of the engaging groove 34. Therefore, when the fixing ring 33 needs to be fixed to the back plate 31, the buckle 314 is rotated to pass through the engaging groove 34 to fix the fixing ring 33.

[0035] In this embodiment, the ejection device 32 includes an arc plate 21, a rubber block 22, a push rod 23, a spring 24, a fixed plate 25 and an eccentric piece 26. The rubber block 22 is arrayed on one side of the arc plate 21 close to the nanofiltration membrane group 2, and the other side of the arc plate 21 is connected to the push rod 23. The spring 24 is installed on the push rod 23. The other end of the spring 24 is connected to the fixed plate 25, and the fixed plate 25 is fixed to the placement groove 311. The other side of the push rod 23 is in contact with the eccentric piece 26.

[0036] In this embodiment, the rubber block 22 can increase the friction force in contact with the nanofiltration membrane group 2, so that the ejection device 32 can fix the nanofiltration membrane group 2 more stably, and the nanofiltration membrane group 2 can be protected by the rubber material to prevent the arc plate 21 from causing damage to the nanofiltration membrane group 2 when clamping.

[0037] In this embodiment, the eccentric member 26 includes an eccentric wheel 41, a main shaft 42, a hexagonal column 43, a handle 44 and a fixed block 45. The top of the eccentric wheel 41 is connected to the main shaft 42 that passes through the through hole 312. The top of the main shaft 42 is fixed with a hexagonal column 43. The hexagonal column 43 is slidably fitted with a handle 44. The bottom of the handle 44 is installed with a fixed block 45. The fixed block 45 can be movably engaged with the slot 313 to fix the eccentric wheel 41, and the rotation fixed angle between the fixed block 45 and the slot 313 is the same as the distance of the push rod 23. Therefore, when the push rod 23 is pushed out to contact with the nanofiltration membrane group 1, the fixed block 42 can always maintain the same position as the slot 313.

[0038] Working principle: The wastewater that needs to be pre-treated by nanofiltration desalination is subjected to nanofiltration desalination through the nanofiltration device 1, and then the wastewater that has completed the desalination treatment is discharged from the concentrate pipe 14 and the permeate pipe 13 at the bottom of the nanofiltration membrane group 2 for collection. The other end of the permeate pipe 13 is connected to the collection box 4, and the permeate can be discharged into the collection box 4 for collection, and after precipitation, it is recycled for secondary use, and the wastewater discharged from the concentrate pipe 14 after desalination pretreatment will be discharged and collected separately;

[0039] When the nanofiltration membrane group 2 needs to be replaced after long-term use, the handle 44 is pulled upward to disengage the fixing block 45 from the slot 313. At this time, the arc plate 21 is driven to retract and reset under the reset action of the spring 24 to lose the fixation to the nanofiltration membrane group 2, and then the buckle 314 is rotated to disengage the fixation between it and the fixing ring 33, and then the fixing ring 33 is rotated to break apart to lose the fixation to the nanofiltration membrane group 2, so that the nanofiltration membrane group 2 can be disassembled and replaced;

[0040] Place the replaced nanofiltration membrane group 2 on the back plate 31, and then rotate the fixing ring 33 to fix the nanofiltration membrane group 2. At this time, rotate the buckle 314 to make it pass through the locking groove 34 on the fixing ring 33 to fix the fixing ring 33, so that the nanofiltration membrane group 2 is installed and fixed. Then rotate the handle 44 to drive the main shaft 42 and the eccentric wheel 41 to rotate through the hexagonal column 43. The eccentric movement of the eccentric wheel 41 can be used to squeeze the spring 24 and push the push rod 23 and the arc plate 21 out to firmly fix the nanofiltration membrane group 2. Then, slide the handle 44 downward to embed the handle 44 into the locking groove 313 with the help of the fixing block 45 to fix the handle 44, so that the eccentric wheel 41 and the arc plate 21 will not be pushed out and reset by the spring 24.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] 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 wastewater nanofiltration pretreatment device, comprising a nanofiltration device (1), a plurality of clamping mechanisms (3) located on one side of the nanofiltration device (1), a nanofiltration membrane group (2) mounted on the clamping mechanisms (3), and a collection box (4) located on one side of the nanofiltration device (1); Features: The clamping mechanism (3) comprises a back plate (31), an ejection device (32) for slidingly cooperating with the inside of the back plate (31), a fixing ring (33) for rotationally cooperating with one end of the back plate (31), and a clamping groove (34) located on one side of the fixing ring (33); The ejection device (32) comprises an arc-shaped plate (21), rubber blocks (22) arranged on one side of the arc-shaped plate (21), a push rod (23) located on the other side of the arc-shaped plate (21), a spring (24) arranged on the push rod (23), a fixing plate (25) located at the other end of the spring (24), and an eccentric member (26) arranged on the other side of the push rod (23).

2. A wastewater nanofiltration pretreatment device according to claim 1, characterized in that: The nanofiltration device (1) comprises a water inlet pipe (11), a dosing pipe (12), a permeate pipe (13) and a concentrated liquid pipe (14); the water inlet pipe (11) and the dosing pipe (12) are both connected to the upper end of the nanofiltration membrane group (2); and the permeate pipe (13) and the concentrated liquid pipe (14) are connected to the bottom end of the nanofiltration membrane group (2).

3. A wastewater nanofiltration pretreatment device according to claim 1, characterized in that: A placement groove (311) is provided inside the back side plate (31), a through hole (312) is provided at the top of the placement groove (311), clamping grooves (313) are provided on both sides of the through hole (312), and a buckle (314) is rotatably engaged at one end of the back side plate (31).

4. A wastewater nanofiltration pretreatment device according to claim 3, characterized in that: The buckle (314) is movably engaged with the engaging groove (34), and the distance between the buckle (314) and the back side plate (31) is equal to the thickness of the engaging groove (34).

5. A wastewater nanofiltration pretreatment device according to claim 1, characterized in that: The eccentric member (26) comprises an eccentric wheel (41), a main shaft (42) located at the top of the eccentric wheel (41), a hexagonal column (43) arranged at the top of the main shaft (42), a handle (44) for slidingly cooperating with the hexagonal column (43), and a fixed block (45) located at the bottom of the handle (44), wherein the fixed block (45) can be movably engaged with the slot (313).

6. A wastewater nanofiltration pretreatment device according to claim 1, characterized in that: The back side plate (31) is fixed to the nanofiltration device (1).

7. A wastewater nanofiltration pretreatment device according to claim 1, characterized in that: The fixing plate (25) is fixed to the placement groove (311).

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