Polytetrafluoroethylene composite filter membrane for sewage treatment

Abstract

The utility model discloses a polytetrafluoroethylene composite filter membrane for sewage treatment, which comprises a positioning frame and a filter element, the filter element comprises a support layer, a graphene filter layer, a polytetrafluoroethylene filter layer and an activated carbon filter layer are sequentially arranged above the support layer, and a gradient microporous structure is formed in the polytetrafluoroethylene filter layer; the inner side surface of the positioning frame is provided with a mounting groove into which the edge of the filter element extends, a movable plate with filter holes is arranged above the positioning frame, one end of the movable plate is connected with one side of the positioning frame through a pin shaft, and the other end of the movable plate is detachably connected with the other side of the positioning frame. The device has the characteristics that the sewage filtering and adsorbing effects are enhanced, and the device is convenient to mount and replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sewage treatment filter membrane, especially a polytetrafluoroethylene composite filter membrane for sewage treatment. BACKGROUND

[0002] The polytetrafluoroethylene membrane has very small pore size, can efficiently capture and filter out tiny particles in sewage, has high filtering efficiency, and the PTFE surface is smooth and not easy to adhere to impurities, reduces the loss of filtered substances, and can maintain a high flow rate and low pressure of the filtered substances.

[0003] However, the filtering effect of the single polytetrafluoroethylene membrane is limited, and it cannot adsorb substances such as different colors and odors in the sewage. At present, the adsorber commonly used in sewage is an activated carbon adsorber, which can remove most of the organic matter, residual chlorine, heavy metals and other substances in the sewage through physical and chemical adsorption.

[0004] However, activated carbon is only suitable for pretreatment of medium pollution, and it is difficult to perform high-precision treatment and sewage treatment of complex components, and has low mechanical strength, short service life and poor durability, and needs to be frequently replaced.

[0005] Therefore, the current filtering membrane for sewage has a single function, and even if an activated carbon adsorption layer is added, it is difficult to perform high-precision and complex treatment, and frequent replacement is required, which is inconvenient. SUMMARY

[0006] The utility model discloses a polytetrafluoroethylene composite filter membrane for sewage treatment, which has the characteristics of enhanced sewage filtration and adsorption effect and convenient installation and replacement.

[0007] The technical scheme of the utility model discloses a polytetrafluoroethylene composite filter membrane for sewage treatment, which comprises a positioning frame and a filter core, the filter core comprises a supporting layer, a graphene filter layer, a polytetrafluoroethylene filter layer and an activated carbon filter layer are sequentially arranged above the supporting layer, and a gradient micropore structure is formed in the polytetrafluoroethylene filter layer; an installation groove for the edge of the filter core to extend into is arranged on the inner side of the positioning frame, a movable plate with filter holes is arranged above the positioning frame, one end of the movable plate is connected to one side of the positioning frame through a pin shaft, and the other end of the movable plate is detachably connected to the other side of the positioning frame.

[0008] In the foregoing polytetrafluoroethylene composite filter membrane for sewage treatment, a clamping block is arranged on one side of the top of the positioning frame, an insertion slot for the movable plate to insert into is arranged on the side surface of the clamping block, a connecting hole communicating with the insertion slot is arranged on the upper surface of the clamping block, and an elastic bolt matched with the connecting hole is arranged on the surface of the movable plate.

[0009] The outer surface of the movable plate is wrapped with a non-woven fabric layer.

[0010] The bottom of the mounting groove is provided with a positioning hole, and the inner bottom surface of the positioning hole is provided with a compression spring.

[0011] The polytetrafluoroethylene filter layer and the activated carbon filter layer are provided with a rubber ring.

[0012] The mounting groove is provided with a protective layer on the side facing the filter core.

[0013] The support layer is a metal fiber layer.

[0014] The pore size of the upper surface of the polytetrafluoroethylene filter layer is 20-30 nm, and the pore size of the lower surface of the polytetrafluoroethylene filter layer is 60-70 nm.

[0015] Compared with the prior art, the polytetrafluoroethylene composite filter membrane for sewage treatment has the beneficial effects that:

[0016] The support layer is used as the bottom layer of the filter core to support and position the filter core, so that deformation of the filter core is less likely to occur; the activated carbon filter layer is arranged at the outermost layer, preliminary sewage adsorption is performed through the activated carbon filter layer, and then high-precision treatment is performed through the graphene filter layer, so that the treatment effect is improved; the polytetrafluoroethylene filter layer is arranged at the middle layer, the polytetrafluoroethylene filter layer is effectively protected, the polytetrafluoroethylene filter layer has a gradient micropore structure formed inside, and is less likely to be blocked, so that the filtration efficiency is improved; the activated carbon filter layer, the polytetrafluoroethylene filter layer and the graphene filter layer are combined, so that the sewage filtration and adsorption effect is significantly enhanced, and the sewage treatment efficiency is improved.

[0017] The movable plate can prevent the filter core from being damaged due to external impact, and prolong the service life of the filter core; and the filter core can be quickly disassembled, cleaned and replaced, so that the purification effect on sewage is prevented from being affected by long-term use of the filter core.

[0018] Therefore, the polytetrafluoroethylene composite filter membrane for sewage treatment has the characteristics of enhanced sewage filtration and adsorption effect and convenient installation and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structural schematic view of the utility model.

[0020] Fig. 2is a structural schematic diagram of a polytetrafluoroethylene filter layer.

[0021] In the drawings, the signs are: 1, positioning frame; 11, mounting groove; 111, positioning hole; 112, compression spring; 113, protective layer; 12, movable plate; 121, filter hole; 122, pin shaft; 123, elastic bolt; 13, non-woven fabric layer; 2, filter core; 21, support layer; 211, clamping block; 22, graphene filter layer; 23, polytetrafluoroethylene filter layer; 231, micropore; 24, activated carbon filter layer; 25, rubber ring; 3, clamping block; 31, insertion slot. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and examples, but not as the basis for limiting the utility model.

[0023] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Example:

[0025] As Figs. 1-2 As shown in the polytetrafluoroethylene composite filter membrane for sewage treatment, including positioning frame 1 and filter core 2, the filter core 2 includes support layer 21, the support layer 21 top is sequentially provided with graphene filter layer 22, polytetrafluoroethylene filter layer 23 and activated carbon filter layer 24, the inside of polytetrafluoroethylene filter layer 23 forms gradient micropore structure;The inner side of positioning frame 1 is provided with the mounting groove 11 for the edge of filter core 2 to extend into, the upper side of positioning frame 1 is provided with movable plate 12 with filter hole 121, one end of movable plate 12 is connected with the side of positioning frame 1 through pin shaft 122, the other end of movable plate 12 is detachably connected with the other side of positioning frame 1.

[0026] The utility model discloses a support layer 21 as the bottom layer of filter core 2 supports and positions, stabilizes the installation position and the form of filter core 2, makes it not easy to deform, places active carbon filter layer 24 in the outermost layer, carries out preliminary sewage adsorption through active carbon filter layer 24, then again through the nanometer channel structure and high specific surface area of graphene filter layer 22 carries out the high accuracy processing of physical screening and adsorption, improves the processing effect, places polytetrafluoroethylene filter layer 23 in the middle layer, carries out up and down protection to polytetrafluoroethylene filter layer 23 through active carbon filter layer 24 and graphene filter layer 22, and polytetrafluoroethylene filter layer 23 forms gradient micropore structure inside, is not easy to jam, improves the filtering efficiency, the utility model discloses active carbon filter layer 24, polytetrafluoroethylene filter layer 23 and graphene filter layer 22 are combined, and the sewage filtration, adsorption effect is enhanced significantly, and the processing efficiency of sewage is improved.

[0027] The utility model discloses still through positioning frame 1 to fixedly install filter core 2, and through movable flap 12 protection filter core 2, prevent filter core 2 from being damaged by the collision of outside, prolong the service life of filter core 2, and the quick dismounting, cleaning and replacement of filter core 2 are convenient, thereby preventing the purification effect of sewage from being influenced by long time use of filter core 2.

[0028] The top side of positioning frame 1 is equipped with the clamping block 3, the side surface of clamping block 3 is equipped with the slot 31 that flap 12 inserts, the upper surface of clamping block 3 is equipped with the connecting hole that communicates with slot 31, and the surface of flap 12 is equipped with the elastic bolt 123 that cooperates and connects with connecting hole. When installing filter core 2, flap 12 is rotated to the slot 31 of clamping block 3, then is connected through elastic bolt 123 and connecting hole, so that flap 12 stably covers the top of filter core 2, prevents filter core 2 from being damaged by the destruction of outside, when needing to dismount filter core 2, press elastic bolt 123, make it separate with connecting hole, then flap 12 is rotated and moves out the slot 31 of clamping block 3, so that filter core 2 is conveniently replaced, cleaned.

[0029] The outer surface of flap 12 is wrapped with non-woven fabric layer 13. The non-woven fabric layer 13 that is provided plays the primary filtering effect of blocking macroparticles, and the non-woven fabric layer 13 on flap 12 is also convenient to install and replace.

[0030] The bottom of mounting groove 11 is equipped with the positioning hole 111, and the inner bottom surface of positioning hole 111 is equipped with compression spring 112; the bottom of support layer 21 is equipped with the clamping block 211 that cooperates and connects with positioning hole 111. Filter core 2 is connected with positioning hole 111 through clamping block 211 on support layer 21, so as to improve the accuracy of the position of filter core 2 and the installation convenience, and through the elastic action of compression spring 112, filter core 2 is tightly attached in positioning frame 1, so as to improve the installation stability and sealing property of filter core 2.

[0031] The rubber ring 25 is arranged between the polytetrafluoroethylene filter layer 23 and the activated carbon filter layer 24. The rubber ring 25 improves the sealing performance of the filter core 2 and facilitates the replacement of the activated carbon filter layer 24.

[0032] The installation groove 11 is provided with a protective layer 113 on the side facing the filter core 2. The protective layer 113 can be a flexible layer or an anti-adhesion coating, which prevents the edge of the filter core 2 from being abraded and facilitates the replacement of the filter core 2.

[0033] The support layer 21 is a metal fiber layer, which plays a certain bearing and stabilizing role and prevents the filter core 2 from being deformed under the impact of sewage for a long time and affecting the purification effect.

[0034] The pore diameter of the micropores 231 on the upper surface of the polytetrafluoroethylene filter layer 23 is 20-30 nm, and the pore diameter of the micropores 231 on the lower surface of the polytetrafluoroethylene filter layer 23 is 60-70 nm. The micropores 231 inside the polytetrafluoroethylene filter layer 23 are formed in a large-small-large state, which reduces the membrane hole blockage and improves the filtered water flow and the purification effect.

[0035] The parts not described in detail in the utility model are prior art, and therefore will not be specifically described herein.

Claims

1. A polytetrafluoroethylene composite filter membrane for sewage treatment, characterized by: The application relates to a filter device, which comprises a positioning frame (1) and a filter core (2), wherein the filter core (2) comprises a support layer (21), and the support layer (21) is sequentially provided with a graphene filter layer (22), a polytetrafluoroethylene filter layer (23) and an activated carbon filter layer (24) from top to bottom, and the polytetrafluoroethylene filter layer (23) is internally provided with a gradient micropore structure; the inner side of the positioning frame (1) is provided with a mounting groove (11) for the edge of the filter core (2) to extend into, the upper side of the positioning frame (1) is provided with a movable plate (12) with filter holes (121), one end of the movable plate (12) is connected with one side of the positioning frame (1) through a pin shaft (122), and the other end of the movable plate (12) is detachably connected with the other side of the positioning frame (1).

2. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: One side of the top of the positioning frame (1) is provided with a clamping block (3), the side of the clamping block (3) is provided with a slot (31) for the movable plate (12) to be inserted into, the upper surface of the clamping block (3) is provided with a connecting hole in communication with the slot (31), and the surface of the movable plate (12) is provided with an elastic bolt (123) matched with the connecting hole.

3. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: The outer surface of the movable plate (12) is wrapped with a non-woven fabric layer (13).

4. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: The bottom of the mounting groove (11) is provided with a positioning hole (111), the inner bottom surface of the positioning hole (111) is provided with a compression spring (112), and the bottom of the support layer (21) is provided with a clamping block (211) matched with the positioning hole (111).

5. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: A rubber ring (25) is arranged between the polytetrafluoroethylene filter layer (23) and the activated carbon filter layer (24).

6. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: One side of the mounting groove (11) is provided with a protective layer (113) facing the filter core (2).

7. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: The support layer (21) is a metal fiber layer.

8. The polytetrafluoroethylene composite filter membrane for sewage treatment according to claim 1, characterized by: The pore diameter of the micropores (231) on the upper surface of the polytetrafluoroethylene filter layer (23) is 20-30 nm, and the pore diameter of the micropores (231) on the lower surface of the polytetrafluoroethylene filter layer (23) is 60-70 nm.

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