A filter device

Abstract

This utility model discloses a filtration device, comprising: a support mechanism; and a filtration mechanism including at least one microporous filter disposed on the support mechanism. The microporous filter includes a filter tank, a filter tank cover, a shelf, and a filter element assembly. The filter element assembly includes multiple stainless steel filter elements. The lower part of the filter tank is connected to a feed pipe, and the upper part of the filter tank is connected to a forward blow pipe. The inlet of the forward blow pipe is connected to the inlet of a backflush pipe. The filter tank cover is connected to at least one branch pipe. The outlet of the backflush pipe and at least one branch pipe are both connected to the middle of a collection pipe. The middle of the collection pipe is also connected to a backwash pipe, and one end of the collection pipe is connected to an outlet pipe. The stainless steel filter elements of this utility model do not swell with the electrolyte, chemical solution, or other liquids to be filtered, ensuring that the liquid to be filtered is not contaminated. They are reusable, reducing costs and being environmentally friendly. Frequent filter element replacement is not required, reducing labor costs and the likelihood of employees coming into contact with chemicals.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, and in particular to a filtration device. Background Technology

[0002] Electrolytes are the medium used in chemical batteries and electrolytic capacitors to provide ions, such as lithium hexafluorophosphate used in lithium-ion batteries. During the electrolyte production process, impurities from the original solution or other sources may become present. If these impurities are not filtered, they will severely affect the purity and performance of the electrolyte, leading to low-quality components made with it. In chemical production processes, filtration of chemical solutions, such as DMC (dimethyl carbonate) and DMAC (dimethylacetamide), is a crucial step. Filtration removes impurities from the solution, ensuring the smooth operation of the chemical process and guaranteeing the quality of the produced products.

[0003] Existing filters use plastic pleated filter cartridges in conjunction with the arrangement of filter pipelines, which require frequent replacement of the filter cartridges, affecting production efficiency. The replacement of plastic pleated filter cartridges requires hazardous waste treatment, which incurs disposal fees and increases production costs, making it environmentally unfriendly. Operators are frequently exposed to chemicals when replacing filter cartridges, affecting their health. In addition, the filter cartridges have a short lifespan and are prone to swelling reactions with the liquid being filtered, leading to contamination and low purity of the liquid. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a filtration device. To achieve the above objective, an embodiment of this utility model provides the following technical solution:

[0005] A filtration device, comprising:

[0006] Supporting institutions;

[0007] A filtration mechanism includes at least one microporous filter disposed on the support mechanism. The microporous filter includes a filter tank, a filter tank cover, a shelf disposed between the filter tank and the filter tank cover, and a filter element assembly connected to the shelf. The filter element assembly includes multiple stainless steel filter elements. The lower part of the filter tank is connected to a feed pipe, and the upper part of the filter tank is connected to a forward blow pipe. The inlet of the forward blow pipe is connected to the inlet of a backflush pipe. The filter tank cover is connected to at least one branch pipe. The outlet of the backflush pipe and the at least one branch pipe are both connected to the middle part of a collection pipe. The middle part of the collection pipe is also connected to a backwash pipe, and one end of the collection pipe is connected to an outlet pipe.

[0008] As a further improvement of this utility model, a connector is provided on the upper part of the stainless steel filter element, the connector is threadedly connected to the layer plate, and a sealing ring is provided between the outer peripheral wall of the connector and the layer plate.

[0009] As a further improvement of this utility model, the stainless steel filter element is inverted conical in shape, and the bottom of the stainless steel filter element is arc-shaped.

[0010] As a further improvement of this utility model, the stainless steel filter element includes a base layer and a membrane layer disposed on the outside of the base layer. The micropore diameter of the base layer is 5-10 μm, and the micropore diameter of the membrane layer is 0.2 μm.

[0011] As a further improvement of this utility model, a pressure gauge and a first pressure transmitter are provided on the upper side wall of the filter tank.

[0012] As a further improvement of this utility model, a pressure reducing valve and a safety valve are provided on the positive blowing pipe near its inlet.

[0013] As a further improvement of this utility model, a sampling tube and a second pressure transmitter are provided on the liquid collection tube, and a blind plate is provided at the other end of the liquid collection tube.

[0014] As a further improvement of this utility model, the upper part of the side wall of the filter tank is connected to a vent pipe.

[0015] As a further improvement of this utility model, the bottom of the filter tank is connected to at least one waste discharge pipe.

[0016] As a further improvement of this utility model, the support mechanism includes two support frames, and the filtration mechanism includes two microporous filters, with the two microporous filters arranged side by side on the two support frames.

[0017] The beneficial effects of this utility model are:

[0018] (1) The stainless steel filter element of this utility model does not swell with the electrolyte, chemical solution and other liquids to be filtered, which can ensure that the liquid to be filtered is not contaminated and ensures purity.

[0019] (2) The stainless steel filter element of this utility model can be reused, reducing costs and being environmentally friendly.

[0020] (3) The stainless steel filter element of this utility model has a service life of about two years. It does not need to be replaced frequently, which reduces labor costs, reduces the chance of employees coming into contact with chemicals, reduces installation liability accidents, and does not require hazardous waste treatment, thus reducing treatment costs.

[0021] (4) By combining backflushing and backwashing, the filter element can be cleaned, further extending its service life. The micropores of the filter element are distributed in a gradient, with smaller pores on the outside and larger pores on the inside, making it easier for impurities on the surface of the filter element to fall off during backwashing.

[0022] (5) This utility model uses two microporous filters side by side to ensure uninterrupted filtration. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a front view of a preferred embodiment of the present invention;

[0025] Figure 2 This is a left view of a preferred embodiment of the present invention;

[0026] Figure 3 This is a top view of a preferred embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection between the shelf and the stainless steel filter element in a preferred embodiment of the present invention.

[0028] Figure 5 for Figure 4 Enlarged diagram of A in the middle;

[0029] In the diagram: 1. Support mechanism; 11. Support frame; 3. Microporous filter; 31. Filter tank; 32. Filter tank cover; 33. Sheet plate; 34. Stainless steel filter element; 341. Connector; 342. Sealing ring; 343. Base layer; 344. Membrane layer; 41. Feed pipe; 411. Feed valve; 42. Forward blow pipe; 421. Inlet; 422. Exhaust valve; 43. Backflush pipe; 431. Inlet; 432. Outlet; 433. Backflush valve; 4 4. Branch pipe, 441. Branch valve, 45. Liquid collection pipe, 451. Liquid collection valve, 46. Backwash pipe, 461. Backwash valve, 47. Discharge pipe, 471. Flow meter, 51. Pressure gauge, 52. First pressure transmitter, 53. Pressure reducing valve, 54. Safety valve, 55. Sampling pipe, 551. Sampling valve, 56. Second pressure transmitter, 57. Blind flange, 58. Vent pipe, 58. Vent valve, 59. Waste discharge pipe, 591. Waste discharge valve. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] Please see Figures 1-4 This application discloses a filtration device, including a support mechanism 1 and a filtration mechanism. The filtration mechanism includes at least one microporous filter 3 disposed on the support mechanism 1. The microporous filter 3 includes a filter tank 31, a filter tank cover 32, a shelf 33 disposed between the filter tank 31 and the filter tank cover 32, and a filter element assembly connected to the shelf 33. The filter element assembly includes multiple stainless steel filter elements 34. The lower part of the filter tank 31 is connected to a feed pipe 41, and the upper part of the filter tank 31 is connected to a forward blow pipe 42. The inlet 421 of the forward blow pipe 42 is connected to the inlet 431 of a backflush pipe 43. The filter tank cover 32 is connected to at least one branch pipe 44. The outlet 432 of the backflush pipe 43 and at least one branch pipe 44 are both connected to the middle part of a collection pipe 45. The middle part of the collection pipe 45 is also connected to a backwash pipe 46. One end of the collection pipe 45 is connected to an outlet pipe 47.

[0032] Please see Figure 4 , Figure 5 The upper part of the stainless steel filter element 34 is provided with a connector 341, which is threaded to the shelf 33. A sealing ring 342 is provided between the outer peripheral wall of the connector 341 and the shelf 33. The connector 341 is made of stainless steel. The connector 341 has external threads, and the shelf 33 has internal threads. The threaded connection between the connector 341 and the shelf 33 enables quick installation between the connector 341 and the shelf 33, thereby facilitating the installation of the stainless steel filter element 34 and improving work efficiency. The sealing ring 342 prevents liquid leakage through the shelf 33, isolates the filtered liquid from the liquid to be filtered, and ensures the purity of the filtered liquid.

[0033] Preferably, the stainless steel filter element 34 is inverted conical in shape, with a rounded bottom to facilitate the discharge of the liquid to be filtered and reduce the adhesion of impurities and liquid to the stainless steel filter element 34. Preferably, the diameter D1 of the top end of the stainless steel filter element 34 is 60 mm, and the diameter D2 of the bottom end of the stainless steel filter element 34 is 50 mm.

[0034] In this embodiment, the stainless steel filter element 34 includes a base layer 343 and a membrane layer 344 disposed on the outer side of the base layer 343. The micropore diameter of the base layer 343 is 5-10 μm, and the micropore diameter of the membrane layer 344 is 0.2 μm. By setting the micropores used for filtration in the stainless steel filter element 34 to a gradient distribution of smaller outer pores and larger inner pores, a larger flow rate and lower pressure resistance can be achieved while ensuring filtration accuracy. Furthermore, during backwashing, impurities on the surface of the stainless steel filter element 34 are more easily removed.

[0035] A pressure gauge 51 and a first pressure transmitter 52 are preferably installed on the upper side wall of the filter tank 31. The pressure gauge 51 displays the pressure inside the filter tank 31 in real time, and the first pressure transmitter 52 converts the pressure value inside the filter tank 31 into an electrical signal and transmits it to the PLC.

[0036] Preferably, a pressure reducing valve 53 and a safety valve 54 are installed on the positive blow pipe 42 near its inlet 421. The inlet 421 of the positive blow pipe 42 is connected to the on-site gas source pipeline, so that compressed gas enters the filter tank 31 to empty the liquid in the filter tank 31, facilitating re-filtration. The pressure reducing valve 53 ensures that the pressure inside the positive blow pipe 42 reaches a set value and maintains a stable pressure entering the filter tank 31, while the safety valve 54 allows compressed gas to be discharged to the outside to prevent the pressure inside the positive blow pipe 42 from rising.

[0037] In this embodiment, a sampling tube 55 and a second pressure transmitter 56 are provided on the liquid collection pipe 45, and a blind plate 57 is provided at the other end of the liquid collection pipe 45. The filtered liquid delivered into the liquid collection pipe 45 is sampled through the sampling tube 55 to check whether the liquid has reached the filtration quality. The second pressure transmitter 56 can convert the pressure value in the liquid collection pipe 45 into an electrical signal and transmit it to the PLC. The blind plate 57 can seal the other end of the liquid collection pipe 45 for backup.

[0038] To facilitate the balancing of the pressure inside the filter tank 31, it is preferable that the upper part of the side wall of the filter tank 31 is connected to a vent pipe 58, through which the gas inside the filter tank 31 is discharged.

[0039] To facilitate the discharge of waste liquid from the filter tank 31, it is preferable that at least one waste discharge pipe 59 is connected to the bottom of the filter tank 31.

[0040] Please see Figure 1 The support mechanism 1 includes two support frames 11, and the filtration mechanism includes two microporous filters 3. The two microporous filters 3 are arranged side by side on the two support frames 11. The two microporous filters 3 are used together to ensure uninterrupted filtration.

[0041] To facilitate the opening and closing of each pipe, it is preferable that the feed pipe 41 is connected to a feed valve 411, the forward blow pipe 42 is connected to a drain valve 422, the backflush pipe 43 is connected to a backflush valve 433, the branch pipe 44 is connected to a branch valve 441, the collection pipe 45 is connected to a collection valve 451, the backwash pipe 46 is connected to a backwash valve 461, the vent pipe 58 is connected to a vent valve 581, and the waste discharge pipe 59 is connected to a waste discharge valve 591. The feed valve 411, drain valve 421, backflush valve 431, branch valve 441, collection valve 451, backwash valve 461, vent valve 581, and waste discharge valve 591 are all pneumatic valves for easy automatic control. The sampling pipe 55 is connected to a sampling valve 551, which is a manual valve. The outlet pipe 47 is connected to a flow meter 471 for real-time monitoring of the outlet flow rate.

[0042] In use, the liquid to be filtered is injected into the filter tank 31 through the feed pipe 41. The liquid flows from the micropores of the membrane layer on the outside of multiple stainless steel filter elements 34 through the micropores of the base layer to the inside. Solid impurities in the liquid are trapped on the outside of the stainless steel filter elements 34. The filtered liquid flows through the inside of the stainless steel filter elements 34 into the cavity formed by the shelf 33 and the filter tank cover 32, and is discharged through the branch pipe 44, the liquid collection pipe 45, and the liquid outlet pipe 47, thus achieving solid-liquid separation and obtaining the filtered liquid. As the amount of solid impurities on the outside of the stainless steel filter elements 34 increases, backflushing is performed. Nitrogen gas is injected through the inlet 431 of the backflushing pipe 43, and then enters the inside of multiple stainless steel filter elements 34 along the liquid collection pipe 45 and the branch pipe 44. Nitrogen gas is blown from the inside of the stainless steel filter elements 34 to the outside, removing particulate matter from the outer surface of the stainless steel filter elements 34. The filtered clean electrolyte is injected into the inside of multiple stainless steel filter elements 34 along the backwash pipe 46, collection pipe 45, and branch pipe 44, cleaning the stainless steel filter elements 34 from the inside out. The vent valve 422 and waste discharge valve 591 are opened, and nitrogen gas is injected into the filter tank 31 along the forward blow pipe 42. The contaminated liquid is discharged along the waste discharge pipe 59, emptying the contaminated liquid in the filter tank 31. The microporous filter 3 can then be used for filtration again. Throughout the filtration process, the solenoid valves can be controlled by a PLC, which controls the opening and closing of each valve.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A filtration device, characterized in that, include: Supporting institutions; A filtration mechanism includes at least one microporous filter disposed on the support mechanism. The microporous filter includes a filter tank, a filter tank cover, a shelf disposed between the filter tank and the filter tank cover, and a filter element assembly connected to the shelf. The filter element assembly includes multiple stainless steel filter elements. The lower part of the filter tank is connected to a feed pipe, and the upper part of the filter tank is connected to a forward blow pipe. The inlet of the forward blow pipe is connected to the inlet of a backflush pipe. The filter tank cover is connected to at least one branch pipe. The outlet of the backflush pipe and the at least one branch pipe are both connected to the middle part of a collection pipe. The middle part of the collection pipe is also connected to a backwash pipe, and one end of the collection pipe is connected to an outlet pipe.

2. The filtration device according to claim 1, characterized in that, The upper part of the stainless steel filter element is provided with a connector, which is threadedly connected to the layer plate, and a sealing ring is provided between the outer peripheral wall of the connector and the layer plate.

3. The filtration device according to claim 1, characterized in that, The stainless steel filter element is inverted conical in shape, and the bottom of the stainless steel filter element is arc-shaped.

4. A filtration device according to claim 3, characterized in that, The stainless steel filter element includes a base layer and a membrane layer disposed on the outside of the base layer. The micropore diameter of the base layer is 5-10 μm, and the micropore diameter of the membrane layer is 0.2 μm.

5. A filtration device according to claim 1, characterized in that, A pressure gauge and a first pressure transmitter are installed on the upper side wall of the filter tank.

6. A filtration device according to claim 1, characterized in that, A pressure reducing valve and a safety valve are installed on the positive blowing pipe near its inlet.

7. A filtration device according to claim 1, characterized in that, The liquid collection pipe is equipped with a sampling tube and a second pressure transmitter, and a blind plate is installed at the other end of the liquid collection pipe.

8. A filtration device according to claim 1, characterized in that, The upper side wall of the filter tank is connected to a vent pipe.

9. A filtration device according to claim 1, characterized in that, The bottom of the filter tank is connected to at least one waste discharge pipe.

10. A filtration device according to claim 1, characterized in that, The support mechanism includes two support frames, and the filtration mechanism includes two microporous filters, which are respectively arranged side by side on the two support frames.

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