Filtering device

Abstract

In order to solve the problem that an existing basket type filtering device is extremely prone to being blocked by large impurities such as demulsifying materials, the utility model provides a filtering device which comprises a plurality of filters, a filter support and a positioning assembly, and the positioning assembly comprises a first positioning mechanism and a second positioning mechanism. A first positioning mechanism is independently arranged outside each filter, a second positioning mechanism is arranged on one side, close to the filter, of the filter support, the filters are arranged on the inner side of the filter support, and the first positioning mechanisms and the second positioning mechanisms form a detachable connecting structure; by adopting the multi-layer filter, the filtering efficiency can be effectively improved, and the condition of filter screen blockage is avoided; besides, the first positioning mechanism and the second positioning mechanism form a detachable connecting structure, and a plurality of filters can be made into a detachable and assemblable form, so that not only can the use requirements under different working conditions be met, but also the cleaning work after use is facilitated; the filter pollution and the influence on the finished product quality are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of dispersed resin production, and particularly relates to a filtering device. Background Technique

[0002] Polytetrafluoroethylene (PTFE) is a high-performance perfluoropolymer with excellent high-temperature resistance and corrosion resistance, and is widely used in the fields of chemical industry, petroleum, environmental protection, etc. In the production of dispersed PTFE resin, paraffin wax is an important stabilizer, which has a crucial impact on polymerization stability and product quality. Since the production process of dispersed PTFE has very high requirements for cleanliness, a paraffin wax filtering device is needed to remove the paraffin wax in the PTFE emulsion, and the residual trace paraffin wax is one of the most common and intractable problems in the production of dispersed resin. There are three common discharging methods in industrial actual production, including: hot discharging, cold discharging, and paraffin wax recycling. Among them, the paraffin wax recycling has less paraffin wax residue, but due to uneven local temperature during the discharging process, there is still a small amount of paraffin wax mixed in, resulting in a significant decline in the quality of the finished product. At present, the main method for removing trace paraffin wax is to use a basket-type filtering device. This filtering device can only filter once, and the pore size is relatively large, and the removal ability cannot meet the requirements. Small particle paraffin wax cannot be effectively filtered. In actual production applications, the existing basket-type filtering device is extremely easy to be blocked by large impurities such as demulsified materials, causing emulsion overflow, affecting the production work efficiency, and may cause emulsion pollution and waste. Therefore, how to overcome the above existing technical problems and defects has become a key problem to be solved. Content of the Utility Model

[0003] Aiming at the problem that the existing basket-type filtering device is extremely easy to be blocked by large impurities such as demulsified materials, causing emulsion overflow, affecting the production work efficiency, and may cause emulsion pollution and waste, the utility model provides a filtering device.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] The utility model provides a filtering device, which includes a plurality of filters, a filter support and a positioning component. The positioning component includes a first positioning mechanism and a second positioning mechanism. The first positioning mechanism is independently arranged outside each of the plurality of filters, and the second positioning mechanism is arranged on the side of the filter support close to the filter. The plurality of filters are arranged inside the filter support, and the first positioning mechanism and the second positioning mechanism form a detachable connection structure.

[0006] Optionally, the plurality of filters include a grid filter and a small-hole filter, and the grid filter is arranged above the small-hole filter.

[0007] Optionally, a grille is provided inside the grille filter, and a small-hole screen is provided inside the small-hole filter, and the aperture of the grille is larger than the aperture of the small-hole screen.

[0008] Optionally, a plurality of the small-hole filters are provided, and the apertures of the small-hole screens of the plurality of small-hole filters are fixed on the filter base from bottom to top in ascending order.

[0009] Optionally, a filter base is further included, and the filter bracket is arranged above the filter base.

[0010] Optionally, the filter bracket is composed of a plurality of telescopic stainless steel pipes, and the filter bracket is vertically arranged with respect to the filter base.

[0011] Optionally, a plurality of the first positioning mechanisms are provided on the outside of each of the filters, and a plurality of the second positioning mechanisms are provided on the side of the filter bracket close to the filter, and the first positioning mechanism and the second positioning mechanism form a detachable connection structure.

[0012] Optionally, both the first positioning mechanism and the second positioning mechanism are positioning magnets, and the second positioning mechanism is arranged on the surface of at least one of the stainless steel pipes close to the filter.

[0013] Optionally, a collection device is embedded in the filter base, the collection device is in a conical shape, the larger opening end of the collection device is the feed inlet, the feed inlet is close to the small-hole screen of the small-hole filter, and the smaller opening end of the collection device is the discharge outlet.

[0014] Optionally, along the direction from the outside to the inside of the filter base, an inclined surface is provided on the upper surface of the filter base, one end of the inclined surface close to the outside of the filter base is higher than one end of the inclined surface close to the inside of the filter base, and one end of the inclined surface close to the inside of the filter base is in contact with the upper end opening of the collection device.

[0015] According to the filtering device provided by the present utility model, by changing the traditional single-time filtering basket filtration to multi-layer filtration, the filtering efficiency can be effectively improved, and the situation of the filter screen being blocked can be effectively avoided; in addition, a plurality of the first positioning mechanisms are provided on the outside of the filters, and a plurality of the second positioning mechanisms are provided on the side of the filter bracket close to the filter, and the first positioning mechanism and the second positioning mechanism form a detachable connection structure; making the plurality of filters into an independent detachable and assembled form, this improvement can not only meet the use requirements under different working conditions, but also facilitate the cleaning work after use. After the filtration is completed, it is convenient to disassemble the filter and thoroughly clean it, avoiding the pollution of the filter and affecting the quality of the finished product. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a filter provided by an embodiment of the present utility model;

[0017] Figure 2 is a schematic structural diagram of a single filter provided by an embodiment of the present utility model;

[0018] Figure 3 is a schematic structural diagram of a filter bracket and a filter base provided by an embodiment of the present utility model;

[0019] The reference numerals in the accompanying drawings of the specification are as follows:

[0020] 1 - grille; 2 - grille filter; 3 - small hole filter; 4 - small hole screen; 5 - filter bracket; 6 - filter base; 61 - inclined surface; 7 - collection device; 71 - feed port; 72 - discharge port; 81 - first positioning mechanism; 82 - second positioning mechanism. Detailed Description of the Embodiment

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "side", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific situations.

[0024] Such as Figures 1 - 3As shown, in one embodiment, a filtering device includes a plurality of filters, a filter bracket 5, and a positioning component. The positioning component includes a first positioning mechanism 81 and a second positioning mechanism 82. The first positioning mechanism 81 is independently disposed outside each of the plurality of filters, and the second positioning mechanism 82 is disposed on a side of the filter bracket 5 close to the filter. The plurality of filters are disposed inside the filter bracket 5, and the first positioning mechanism 81 and the second positioning mechanism 82 form a detachable connection structure.

[0025] Currently, the post-treatment process of dispersed PTFE production mainly includes the following steps: (1) After the polymerization reaction is completed, the emulsion is discharged into the intermediate tank for the dispersion liquid after natural cooling. At this time, most of the massive paraffin remains in the polymerization kettle, but there are still many small particles of paraffin remaining in the emulsion; (2) After the emulsion is cooled by cold water at 5°C in the intermediate tank, it is then filtered through a basket filter from the intermediate tank for the dispersion liquid and discharged into the collection tank; (3) After standing in the collection tank for a period of time, it is filtered through a basket filter from the collection tank and discharged into the coagulator; (4) After coagulation and washing in the coagulator, the wet material is fished out and dried to obtain the finished product of dispersed PTFE.

[0026] The current basket filter is non-detachable and for single-time filtration, with low use efficiency, troublesome cleaning, incomplete cleaning, easy to cause filter contamination, and affecting the quality of the PTFE finished product.

[0027] This application changes the traditional non-detachable basket filter into a form composed of a filter and a filter bracket 5. This application includes a plurality of filters, changing the traditional single-time filtration basket filter into multi-layer filtration, which can effectively improve the filtration efficiency and effectively avoid the situation of filter mesh blockage.

[0028] This application can independently select the number of filters according to production requirements to achieve an efficient paraffin removal effect.

[0029] In addition, the first positioning mechanism 81 is disposed outside the plurality of filters, and the second positioning mechanism 82 is disposed on a side of the filter bracket 5 close to the filter. The first positioning mechanism 81 and the second positioning mechanism 82 form a detachable connection structure; the plurality of filters are made into an independently detachable and assemblable form. This improvement not only meets the usage requirements under different working conditions, but also facilitates the cleaning work after use. After filtration is completed, it is convenient to disassemble the filter for thorough cleaning, avoiding filter contamination and affecting the quality of the finished product.

[0030] The filter is improved from single-layer filtration to multi-layer filtration, and filters with different pore sizes are made into an independently detachable and assemblable form. This improvement not only meets the usage requirements under different working conditions, but also facilitates the cleaning work after use.

[0031] Such asFigure 1 As shown, in one embodiment, a plurality of the filters include a grille filter 2 and a small-hole filter 3, and the grille filter 2 is disposed above the small-hole filter 3.

[0032] The utility model improves the traditional basket filter device, transforms the single-layer fixed filter device into a multi-layer self-assembled filter device, and uses the grille filter 2 to filter at the top of the filter device, which can remove the demulsifying agent and large paraffin in the emulsion in advance, prevent the demulsifying agent and large paraffin from blocking the filter screen during the filtering process, and effectively improve the filtering efficiency.

[0033] The small-hole filter 3 further filters the emulsion.

[0034] In the actual production process, the small-hole filter 3 and the grille filter 2 can be assembled according to actual needs to achieve different filtering effects. This device can effectively remove the residual fine paraffin particles in the PTFE emulsion, improve the post-treatment efficiency of PTFE production, and enhance the product quality.

[0035] As Figure 1 shown, in one embodiment, a grille 1 is disposed inside the grille filter 2, a small-hole screen 4 is disposed inside the small-hole filter 3, and the aperture of the grille 1 is larger than the aperture of the small-hole screen 4.

[0036] The grille filter 2 is fixed on the topmost layer. After the filter device is assembled, the emulsion is fed from the feeding port, passes through the grille filter 2 to filter out the demulsifying agent or paraffin particles with larger particles. If too much solid accumulates on the grille 1, the solid can be manually collected and temporarily stored in the storage tank of the grille filter 2, and then cleaned up uniformly after the filtering is completed; after being filtered by the grille 1, it then flows into the lower small-hole filter 3 for further filtering, and the emulsion after being filtered by the upper layer is further filtered by the finer small-hole filter 3; after the filtering is completed, each stage of the filter can be disassembled and cleaned.

[0037] As Figure 1 shown, in one embodiment, a plurality of the small-hole filters 3 are provided, and the apertures of the small-hole screens 4 of the plurality of the small-hole filters 3 are fixed on the filter base 6 in ascending order from bottom to top.

[0038] This application changes the traditional single-time filtering basket filter to a multi-layer small-hole filter 3 filtering device, assembles the filters according to the order that the aperture gradually becomes smaller from top to bottom, and can completely remove the trace paraffin in the emulsion through one filtering operation, which not only reduces the number of filtering operations, but also greatly improves the filtering effect.

[0039] As Figure 3 shown, in one embodiment, it further includes a filter base 6, and the filter bracket 5 is disposed above the filter base 6.

[0040] Specifically, the apertures of the small-hole sieves 4 of the multiple small-hole filters 3 in this application are fixed on the filter base 6 from bottom to top in ascending order, and finally the grid filter 2 is fixed at the topmost of the filter base 6, completing the assembly of the filter.

[0041] As Figure 3 shown, in one embodiment, the filter bracket 5 is composed of multiple telescopic stainless steel pipes, and the filter bracket 5 is vertically arranged with the filter base 6.

[0042] Specifically, the filter bracket 5 is composed of three telescopic stainless steel pipes, and the projection of the filter bracket 5 on the upper surface of the filter base 6 is an isosceles triangle;

[0043] Further, the filter bracket 5 is composed of four telescopic stainless steel pipes, and the projection of the filter bracket 5 on the upper surface of the filter base 6 is a square.

[0044] The filter bracket 5 is composed of multiple telescopic stainless steel pipes. When fewer filters are needed, the filter bracket 5 is in a contracted state, which is convenient to use and occupies a small area.

[0045] When more filters are needed, the filter bracket 5 is in a stretched state to fix multiple filters.

[0046] As Figures 2 - 3 shown, in one embodiment, multiple first positioning mechanisms 81 are arranged outside each filter, and multiple second positioning mechanisms 82 are arranged on one side of the filter bracket 5 close to the filter. The first positioning mechanism 81 and the second positioning mechanism 82 form a detachable connection structure.

[0047] Specifically, there are multiple second positioning mechanisms 82 and multiple first positioning mechanisms 81. One of the second positioning mechanism 82 and the first positioning mechanism 81 is selected from a snap block structure, and the other of the second positioning mechanism 82 and the first positioning mechanism 81 is selected from a slot structure. The second positioning mechanism 82 and the first positioning mechanism 81 are fixedly connected through a snap connection structure, which can help position multiple filters. After positioning, they can be fixed through the snap connection structure, ensuring that filters with different apertures do not slide relative to each other on the filter bracket 5.

[0048] Further, the first positioning mechanism 81 and the second positioning mechanism 82 can also achieve a fixed effect through other detachable structures.

[0049] As Figures 2 - 3As shown, in one embodiment, both the first positioning mechanism 81 and the second positioning mechanism 82 are positioning magnets, and the second positioning mechanism 82 is disposed on the surface of at least one of the stainless steel pipes close to the filter.

[0050] Specifically, when the filter bracket 5 is composed of three retractable stainless steel pipes, the projection of the filter bracket 5 on the upper surface of the filter base 6 is an isosceles triangle. The second positioning mechanism 82 is disposed on the middle stainless steel pipe. The second positioning mechanism 82 can assist in positioning the filter. Multiple pairs of positioning magnets are provided on the filter bracket 5, corresponding to the positioning magnets on the filter. After positioning, they can be fixed by magnetic adsorption, which can ensure that filters with different apertures do not slide relative to each other on the filter bracket 5.

[0051] As Figure 3 shown, in one embodiment, a collection device 7 is embedded in the filter base 6. The collection device 7 is in a conical shape. The larger opening end of the collection device 7 is the feed inlet 71, and the feed inlet 71 is close to the small hole screen 4 of the small hole filter 3. The smaller opening end of the collection device 7 is the discharge outlet 72.

[0052] Specifically, the emulsion is discharged from the discharge port, passes through the grid filter 2 to filter out larger demulsifying materials or paraffin particles, passes through the grid 1, and then passes through the lower small hole filter 3 to filter paraffin particles with different particle sizes step by step. The filtered emulsion enters the collection device 7 through the feed inlet 71 and flows out through the discharge outlet 72 to collect the filtered emulsion.

[0053] As Figure 3 shown, in one embodiment, along the direction from the outside to the inside of the filter base 6, an inclined surface 61 is provided on the upper surface of the filter base 6. One end of the inclined surface 61 close to the outside of the filter base 6 is higher than one end of the inclined surface 61 close to the inside of the filter base 6. One end of the inclined surface 61 close to the inside of the filter base 6 is in contact with the upper end opening of the collection device 7.

[0054] A collection device 7 is provided on the filter base 6, and an inclined surface 61 is provided on the upper surface of the base to ensure that the filtrate enters the collection device 7 without overflowing.

[0055] For the multiple small-hole filters 3 of the present application, the apertures of the small-hole sieves 4 are fixed on the filter base 6 from bottom to top in ascending order, and finally the grid filter 2 is fixed at the uppermost part of the filter base 6. After the filter assembly is completed, the emulsion is fed from the feeding port, passes through the grid filter 2 to filter out larger demulsifying materials or paraffin particles. If too much solid accumulates on the grid 1, the solid can be manually collected and temporarily stored in the storage tank of the grid filter 2. After passing through the grid 1, it then passes through the lower small-hole filters 3 to gradually filter paraffin particles of different particle sizes. Finally, the filtered emulsion is collected through the conical base and enters the next process section through a pipeline. After the filtration is completed, each stage of the filter can be disassembled and cleaned.

[0056] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filtering device, characterized in that: It includes multiple filters, a filter bracket and a positioning component. The positioning component includes a first positioning mechanism and a second positioning mechanism. The first positioning mechanism is independently arranged on the outside of each of the multiple filters, and the second positioning mechanism is arranged on the side of the filter bracket close to the filter. The multiple filters are arranged inside the filter bracket. Both the first positioning mechanism and the second positioning mechanism are positioning magnets, and the first positioning mechanism and the second positioning mechanism form a detachable connection structure; The multiple filters include a grille filter and a small-hole filter, and the grille filter is arranged above the small-hole filter; A grille is arranged inside the grille filter, and a small-hole screen is arranged inside the small-hole filter. The aperture of the grille is larger than the aperture of the small-hole screen; It further includes a filter base, and the filter bracket is arranged above the filter base; There are multiple small-hole filters, and the apertures of the small-hole screens of the multiple small-hole filters are fixed on the filter base from bottom to top in ascending order.

2. The filtering device according to claim 1, wherein: The filter bracket is composed of multiple telescopic stainless-steel steel pipes, and the filter bracket is vertically arranged with respect to the filter base.

3. The filtering device according to claim 2, characterized in that: Multiple first positioning mechanisms are arranged on the outside of each filter, and multiple second positioning mechanisms are arranged on the side of the filter bracket close to the filter. The first positioning mechanism and the second positioning mechanism form a detachable connection structure.

4. The filtering device according to claim 3, characterized in that: The second positioning mechanism is arranged on the surface of at least one of the stainless-steel steel pipes close to the filter.

5. The filtering device according to claim 1, wherein: A collection device is embedded in the filter base. The collection device is conical. The larger opening end of the collection device is the feed inlet, and the feed inlet is close to the small-hole screen of the small-hole filter. The smaller opening end of the collection device is the discharge outlet.

6. The filtering device according to claim 5, characterized in that: Along the direction from the outside to the inside of the filter base, an inclined surface is arranged on the upper surface of the filter base. One end of the inclined surface close to the outside of the filter base is higher than one end of the inclined surface close to the inside of the filter base, and one end of the inclined surface close to the inside of the filter base is in contact with the upper-end opening of the collection device.

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