TWI734659B - Fluororesin filter device, unit and its manufacturing method - Google Patents

Abstract

The present invention provides a fluororesin filter device, unit and its manufacturing method, comprising a plurality of fluororesin fibers and two fixing elements. Each fluororesin fibers is a hollow tube which having a plurality of pores on the tube wall. Two fixing elements, made from a fluororesin material, are respectively sleeved at two sides of each fluororesin fibers. Using a high-temperature bath to fix the plurality of fluororesin fibers into a bundle by fused with two fixing elements.

Description

Fluororesin filtering device, component and manufacturing method thereof

A filtering device, in particular a fluororesin filtering device, a component and a manufacturing method thereof.

The conventional Teflon has anti-sticking properties, chemical resistance, heat resistance, excellent surface smoothness with a low friction coefficient, and UV resistance. This Teflon is widely used in various semiconductor and medical industries and even It is products such as non-stick pans among the people's livelihood products.

In addition to the above-mentioned characteristics of the Teflon (polytetrafluoroethene, PTFE) as the main body, a PTFE fiber tube made of it has a porous structure, which makes the PTFE Vinyl fiber tube is commonly used as a filter element in the chemical industry that requires high cleanliness and filtration technology.

In the past technology, the welding melting point of the Teflon is very different from other rigid materials, which makes it difficult for the Teflon to be welded and formed with other materials. In order to fix the two ends of the PTFE fiber tube into a bundle, Nowadays, a resin material such as an epoxy resin, a vinyl resin, and a polyurethane is used as a fixing material, and a grouting method is used to inject the above-mentioned substances into a mold arranged with a plurality of the PTFE fiber tubes And solidify to form the filter element.

However, the above-mentioned resin materials do not have the excellent adhesion resistance, chemical resistance and heat resistance as the Teflon, so that the filter element cannot be used for high acid, alkali and high temperature substances, and as the number of uses increases, the The filter element is also prone to the risk of sticking and contamination due to the use of the non-fluororesin fixing material, and the service life is reduced.

In order to enable a filter element made of a plurality of PTFE fiber tubes to be better applied to high acid, alkali and high temperature substances and to avoid the risk of sticking and pollution, the present invention provides a fluororesin filter device and assembly And a manufacturing method thereof. The fluororesin filter assembly includes a plurality of PTFE fiber tubes and two fixing elements, the plurality of PTFE fiber tubes are a hollow tubular fiber, and each tube wall of the PTFE fiber tube The upper contains a plurality of holes, each of the fixing elements is made of a fluororesin material, two of the fixing elements are respectively sleeved on the opposite ends of the PTFE fiber tube, and a plurality of the PTFE The fiber tubes are fixed into bundles.

Wherein, each of the fixing elements is penetrated with a plurality of perforations, and the two ends of each of the PTFE fiber tubes are correspondingly penetrated at the plurality of perforation positions on the two fixing elements.

The fluororesin filtering device includes a housing and a filter element. The housing can be defined as a filtering space. The housing includes a first flow path and a second flow path, the first flow path and the second flow path part Overlapping the filter space, the first circulation path includes a first inlet and a first outlet, the second circulation path includes a second inlet and a second outlet, and the filter element includes a plurality of polytetrafluoroethylene fiber tubes And two fixing elements, a plurality of the polytetrafluoroethylene fiber tubes are a hollow tubular fiber, the tube wall of each polytetrafluoroethylene fiber tube contains a plurality of pores, and each of the fixing elements is made of a fluororesin material, The two fixing elements are respectively sleeved on opposite ends of each PTFE fiber tube, and a plurality of the PTFE fiber tubes are fixed into a bundle, wherein a plurality of bundles of the PTFE fiber The inside of the tube communicates with the first circulation path or the second circulation path.

Further, the two open ends in the tube of the plurality of bundles of the polytetrafluoroethylene fiber tube are respectively communicated with the second inlet and the second outlet.

Further, the housing is made of a fluororesin material, and the material of the housing can be selected from polytetrafluoroethylene, polyperfluoroethylene propylene, perfluoroalkylate, ethylene-tetrafluoroethylene copolymer or polyvinylidene The group of fluoroethylene combinations; the material of the fixing element can be selected from the group consisting of polytetrafluoroethylene, polyperfluoroethylene propylene, perfluoroalkylate, ethylene-tetrafluoroethylene copolymer or polyvinylidene fluoride Group.

The present invention provides a method for manufacturing a fluororesin filter device, the steps of which include: One end of a plurality of PTFE fiber tubes penetrates at least one fixing element, and at least one of the fixing elements is sleeved outside the plurality of PTFE fiber tubes, so that the PTFE fiber tubes are bundled; A plurality of the PTFE fiber tubes in a bundle are immersed in a high temperature bath with one end sheathed with the fixing element, and a plurality of the PTFE fiber tubes and the fixing element partially immersed in the high temperature bath are melted and softened, so that each The outer wall of the PTFE fiber tube is welded to a plurality of inner walls of the perforations; After cooling, a plurality of the polytetrafluoroethylene fiber tubes are bonded with at least one of the fixing elements.

Further, a support ring is used to sleeve the fixing element and the plurality of PTFE fiber tubes, and immerse them in the high temperature bath together to prevent the fixing element from shifting relative to the plurality of PTFE fiber tubes.

Further, the high temperature bath contains a salt, and the salt material can be selected from potassium nitrate, sodium nitrite, sodium nitrate, sodium chloride, calcium chloride, lithium carbonate, potassium carbonate, sodium carbonate, chlorinated Group of barium combinations.

Further, the proportion of each material selected for the salt to the whole is between 20 and 80%, and the temperature of the high temperature bath is between 150 and 500 Celsius.

The fluororesin filter device, component and manufacturing method provided by the present invention can achieve the following advantages: 1. The high temperature bath equipment and steps are simple, and the price is low. 2. A plurality of the PTFE fiber tubes and a plurality of the perforations can be completely immersed in the high temperature bath for heating, so that the welding efficiency is good. 3. Compared to heating with a heating tool or a welding method, heating by immersion in the high-temperature bath can not only achieve a uniform heating effect, but also prevent pollution from a plurality of the PTFE fiber tubes and a plurality of the perforations. risks of.

Please refer to FIG. 1, which is a fluororesin filter device, a component and a manufacturing method and joining method thereof provided by the present invention. The fluororesin filter device includes a housing 10 and a filter element 20. The housing 10 is a hollow rod-shaped The inside of the housing 10 can be defined as a filter space 15, the filter element 20 penetrates the filter space, two liquids can penetrate the filter element 20 in the filter space, using a liquid saturation principle and a vapor pressure difference The principle is that a part of the substance in a first liquid is filtered by the filter element 20 into a second liquid.

The housing 10 includes a first circulation path and a second circulation path, the first circulation path and the second circulation path are partially overlapped in the filtering space, and the first circulation path includes a first inlet 11 and a first outlet 12. The second circulation path includes a second inlet 13 and a second outlet 14. The housing 10 passes through the first circulation path and the second circulation path so that the first liquid and the second liquid can respectively reach the first The inlet 11 and the second inlet 13 enter; and they are discharged from the first outlet 12 and the second outlet 14.

The housing 10 is made of a fluororesin material, and the material of the housing 10 can be selected from polytetrafluoroethylene (PTFE), polyperfluoroethylene propylene (FEP), perfluoroalkylate (PFA), ethylene-tetrafluoroethylene (PTFE), A group of combinations of ethylene fluoride copolymer (ETFE) or polyvinylidene fluoride (PVDF). In this embodiment, the housing 10 is made of a perfluoroalkyl compound.

Please refer to FIG. 2, opposite ends of the filter element 20 include two open ends 21, and two of the open ends 21 can communicate with the first circulation path or the second circulation path. In this embodiment, two The open end 21 is communicated with the second inlet 13 and the second outlet 14 respectively.

The filter element 20 includes a plurality of polytetrafluoroethylene fiber tubes 22 and two fixing elements 23. The plurality of polytetrafluoroethylene fiber tubes 22 are hollow tubular fibers, and each of the polytetrafluoroethylene fiber tubes 22 includes There are multiple pores. Each of the fixing elements 23 has a plurality of perforations 231 penetrating, and two ends of each of the PTFE fiber tubes 22 are correspondingly penetrated at the positions of the plurality of perforations 231 on the two fixing elements 23, so that two of the fixing elements 23 can fix a plurality of the PTFE fiber tubes 22 into a bundle to form the filter element 20.

When the second liquid enters through the second inlet 13, the second liquid directly enters the plurality of PTFE fiber tubes 22, and is discharged through the second outlet 14, completing the second circulation path, In contrast, when the first liquid enters through the first inlet 11, the first liquid flows in the filter space between a housing 10 and the filter element 20, and the first liquid does not directly contact the second liquid. The first liquid passes through a plurality of pores on the wall of the polytetrafluoroethylene fiber tube 22 to exchange the part of the substance with the second liquid.

Please refer to FIG. 3, which is a manufacturing method of a fluororesin filter device provided by the present invention. The steps include: inserting one end of a plurality of the PTFE fiber tubes 22 into one of the plurality of perforations 231, One of the fixing elements 23 is sheathed outside the plurality of PTFE fiber tubes 22 and bundled; the bundled plurality of PTFE fiber tubes 22 are sheathed with one end of the fixing element 23 Immersed in a high temperature bath 30, so that the plurality of the PTFE fiber tubes 22 and the fixing elements 23 partially immersed in the high temperature bath melt and soften. At this time, the outer wall of each PTFE fiber tube 22 and the plurality of The inner wall of the perforation 231 is welded; a plurality of the PTFE fiber tubes 22 and one of the fixing elements 23 are cooled; then, the other fixing element 23 is sleeved on the other end of the plurality of PTFE fiber tubes 22 And repeat the step of immersing in the high temperature bath 30, so that a plurality of the PTFE fiber tubes 22 are fixed into a bundle via the two fixing elements 23.

The fixing element 23 is made of a fluororesin material, and the material of the fixing element 23 can be selected from polytetrafluoroethylene (PTFE), polyperfluoroethylene propylene (FEP), perfluoroalkylate (PFA), ethylene -Tetrafluoroethylene copolymer (ETFE) or polyvinylidene fluoride (PVDF) combination group. In this embodiment, the housing 10 is made of a perfluoroalkyl compound.

Preferably, a support ring is sleeved on the outside of the fixing element 23 and the bundled plurality of PTFE fiber tubes 22, and immersed in the high temperature bath 30 together, so that the fixing element 23 can be prevented from opposing The plurality of polytetrafluoroethylene fiber tubes 22 are displaced, so that the fixing element 23 and the plurality of polytetrafluoroethylene fiber tubes 22 are welded at an accurate relative position.

The high temperature bath 30 contains a salt, and the salt material can be selected from a combination of potassium nitrate, sodium nitrite, sodium nitrate, sodium chloride, calcium chloride, lithium carbonate, potassium carbonate, sodium carbonate, and barium chloride. In the group, the proportion of each material selected by the salt to the whole is between 20 and 80%, and the temperature of the high temperature bath 30 is between 150 and 500 Celsius.

The fluororesin filter device, component and manufacturing method provided by the present invention can achieve the following advantages: 1. The high temperature bath 30 has simple equipment and steps, and low cost. 2. A plurality of the PTFE fiber tubes 21 and a plurality of the perforations 231 can be completely immersed in the high temperature bath for heating, so that the welding efficiency is good. 3. Compared with heating by a heating tool or a welding method, heating by immersion in the high temperature bath 30 can not only achieve a uniform heating effect, but also prevent a plurality of the PTFE fiber tubes 21 and a plurality of the perforations 231 There is a risk of pollution.

10: Shell 11: First entrance 12: The first exit 13: Second entrance 14: Second exit 15: filter space 20: filter element 21: open end 22: PTFE fiber tube 23: fixed element 231: Piercing 30: High temperature bath

Figure 1 is a side view of a preferred embodiment of the present invention Figure 2 is an exploded view of a preferred embodiment of the present invention Figure 3 is a schematic diagram of a preferred embodiment of the present invention

10: Shell

15: filter space

20: filter element

22: PTFE fiber tube

23: fixed element

Claims (10)

A fluororesin filter device includes a housing and a filter element, the interior of the housing can be defined as a filter space, the housing includes a first circulation path and a second circulation path, the first circulation path and the second circulation path The path partially overlaps the filter space, the first circulation path includes a first inlet and a first outlet, and the second circulation path includes a second inlet and a second outlet; the filter element includes a plurality of polytetrafluoroethylene A fiber tube and two fixing elements, a plurality of the polytetrafluoroethylene fiber tubes are a hollow tubular fiber, the tube wall of each of the polytetrafluoroethylene fiber tubes contains a plurality of pores, and each of the fixing elements is made of a fluororesin material The two fixing elements are respectively sleeved on the opposite ends of each PTFE fiber tube, and a plurality of the PTFE fiber tubes are fixed into a bundle, wherein: the plurality of PTFE fiber tubes are bundled by the fixing element One of the PTFE fiber tubes is immersed in a high temperature bath, so that the outer wall of each PTFE fiber tube is welded to a plurality of the inner walls of the perforation; and the inner wall of the plurality of bundles of the PTFE fiber tube The first circulation path or the second circulation path is connected. According to the fluororesin filtering device according to claim 1, two open ends of a plurality of bundles of the polytetrafluoroethylene fiber tube are respectively connected to the second inlet and the second outlet. According to the fluororesin filter device according to claim 1 or 2, the housing is made of a fluororesin material, and the material of the housing can be selected from polytetrafluoroethylene, polyperfluoroethylene propylene, perfluoroalkyl, The group of ethylene-tetrafluoroethylene copolymer or polyvinylidene fluoride combination; the material of the fixing element can be selected from polytetrafluoroethylene, polyperfluoroethylene propylene, perfluoroalkylate, ethylene-tetrafluoroethylene Group of copolymers or combinations of polyvinylidene fluoride. A fluororesin filter assembly comprising a plurality of polytetrafluoroethylene fiber tubes and two fixing elements, the plurality of polytetrafluoroethylene fiber tubes are a hollow tubular fiber, and the tube wall of each polytetrafluoroethylene fiber tube contains A plurality of holes, each of the fixing elements is made of a fluororesin material, and two of the The fixing elements are respectively sleeved on the opposite ends of the PTFE fiber tubes, and a plurality of the PTFE fiber tubes are fixed into a bundle, wherein the plurality of the PTFE fiber tubes bundled by the fixing element The ethylene fiber tube is immersed in a high temperature bath, so that the outer wall of each polytetrafluoroethylene fiber tube is welded to a plurality of inner walls of the perforation. According to the fluororesin filter assembly of claim 4, each of the fixing elements is penetrated with a plurality of perforations, and the two ends of each of the PTFE fiber tubes are correspondingly penetrated at the plurality of perforation positions on the two fixing elements . A method for manufacturing a fluororesin filter device, the steps comprising: inserting one end of a plurality of polytetrafluoroethylene fiber tubes through at least one fixing element, and at least one of the fixing elements is sleeved outside the plurality of polytetrafluoroethylene fiber tubes , Make the PTFE fiber tube into a bundle; immerse the bundle of a plurality of the PTFE fiber tubes into a high temperature bath with one end sheathed with the fixing element, and partly immerse the plurality of the PTFE fiber tubes in the high temperature bath The ethylene fiber tube and the fixing element are melted and softened, so that the outer wall of each PTFE fiber tube is welded with a plurality of the perforated inner walls; and the plurality of the PTFE fiber tubes after cooling are bonded to at least one of the fixing elements . The method for manufacturing a fluororesin filter device as described in claim 6, using a support ring sleeved on the outside of the fixing element and a plurality of the polytetrafluoroethylene fiber tubes, and immersed in the high temperature bath to prevent the fixing element Displacement relative to a plurality of the PTFE fiber tubes. According to the method for manufacturing a fluororesin filter device according to claim 6 or 7, the high temperature bath contains a salt, and the material of the salt can be selected from potassium nitrate, sodium nitrite, sodium nitrate, sodium chloride, chlorine The group of combinations of calcium chloride, lithium carbonate, potassium carbonate, sodium carbonate, and barium chloride. According to the manufacturing method of the fluororesin filter device according to claim 8, the temperature of the high-temperature bath is between 150 and 500 Celsius. According to the method for manufacturing a fluororesin filter device described in claim 9, the proportion of each material selected for the salt in the whole is between 20 and 80%.

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