Fluoroplastic wire mesh corrugated structured packing for chemical industry

Abstract

The utility model belongs to the technical field of structured packing, and discloses fluoroplastic silk screen corrugated structured packing for chemical engineering. The packing is mainly and technically characterized by comprising a packing body formed by a plurality of corrugated meshes with crest lines and trough lines, the corrugated lines and the trough lines of the adjacent corrugated meshes intersect to form a certain angle, the corrugated meshes comprise vertical weft yarns and horizontal warp yarns, the warp yarns and the weft yarns comprise metal inner cores, and the metal inner cores are arranged in the packing body. The outer side of the metal inner core is wrapped with a fluoroplastic layer, and the fluoroplastic layer is fixed at the cross joint of the warp and the weft. After the woven mesh is heated, the fluoroplastic layers at the joints of the warp yarns and the weft yarns are melted and bonded together, so that the mesh is good in stability, the thickness at the joints of the warp yarns and the weft yarns is reduced, and the mesh is good in flatness; the metal inner core at the joint of the warp and the weft is not easy to separate from the fluoroplastic layer, so that the corrosion resistance of the whole fluoroplastic silk screen corrugated structured packing for the chemical industry is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of structured packing, especially relates to a fluoroplastic wire mesh corrugated structured packing for chemical industry. BACKGROUND

[0002] In the fields of petrochemical industry, air separation, food processing, pharmacy, sewage treatment, etc., structured packing is needed for separation. The fluoroplastic wire mesh corrugated structured packing for chemical industry currently in use mainly has the following types: first, metal plates or metal wire meshes are used, which have poor corrosion resistance, short service life, and can pollute the medium. In order to improve the corrosion resistance, titanium alloy or other corrosion-resistant materials are used for the metal plates, but the price is high and it is difficult to promote. Second, non-metal plates or non-metal wire meshes are used, which have poor support strength and are prone to deformation under high temperature, affecting the performance of the product. Third, non-metal corrosion-resistant materials with certain strength such as ceramics are used. Due to the influence of the performance and processing technology of ceramics, the corrugated structured packing made of ceramic materials has the problems of large weight, large volume, high cost, low specific surface area, and poor effect, and is prone to damage during production, storage, transportation, and installation. Fourth, a layer of corrosion-resistant material such as polytetrafluoroethylene material is attached to the outer side of the metal plates or metal wire meshes by methods such as spraying or slurry impregnation. In the utility model patent application with the application publication number "CN112973616A" and the patent application number "202110351557.X", the patent name is "High-strength polytetrafluoroethylene wire mesh fluoroplastic wire mesh corrugated structured packing for chemical industry and its preparation method and application", which discloses that a layer of polytetrafluoroethylene material is attached to the outer side of the metal wire mesh by methods such as spraying or slurry impregnation. Although this fluoroplastic wire mesh corrugated structured packing for chemical industry solves the problems of corrosion resistance and support strength, it still has the following defects: first, the spraying or slurry impregnation is carried out after the mesh is welded, and the fluoroplastic layer can be wrapped around the outer surface of the combination of the weft wire and the warp wire, but there is no fluoroplastic material at the combination of the weft wire and the warp wire, and due to the tension of the fluoroplastic layer, there are gaps around the combination of the weft wire and the warp wire. However, during transportation, installation, and use, the combination of the weft wire and the warp wire is prone to sliding, and the polytetrafluoroethylene layer at the combination of the weft wire and the warp wire is prone to falling off, so that the metal wire is directly exposed to the outside, greatly reducing the corrosion resistance. Second, during heating after spraying, the end of the warp wire and the weft wire is exposed to the outside, which is prone to corrosion, and the corroded metal wire is prone to polluting the medium. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a fluoroplastic wire mesh corrugated structured packing for chemical industry, which has good corrosion resistance, long service life, does not pollute the medium, has a large specific surface area, good treatment effect, small volume, and light weight.

[0004] The utility model discloses fluoroplastic wire mesh corrugated regular packing for chemical industry solves the above -mentioned problem, and the technical scheme that the utility model discloses fluoroplastic wire mesh corrugated regular packing for chemical industry adopts is: including the packing body that a plurality of corrugated sheets with wave crest line and wave trough line constitute, the corrugated line and wave trough line of adjacent corrugated sheet intersect into a certain angle, its characterized in that: the corrugated sheet is including the weft in vertical direction and warp, the warp and weft include metal inner core, and the fluoroplastic layer is wrapped outside the metal inner core, and is fixed at the warp and weft intersection joint.

[0005] Its additional technical features are:

[0006] The weft of each corrugated sheet is reciprocally woven with a plurality of warps;

[0007] The end of the cut-off warp is provided with a corrosion-resistant warp sleeve;

[0008] The packing body includes at least two packing parts, which form a cylindrical packing body. Each packing part includes a plurality of corrugated sheets. The corrugated sheets of each packing part are connected together by transverse connecting lines.

[0009] The chemical fluoroplastic wire mesh corrugated regular filler has the following advantages compared with the prior art: firstly, the filler body is composed of multiple corrugated meshes with wave crest lines and wave trough lines, the wave crest lines and the wave trough lines of the adjacent corrugated meshes intersect at a certain angle, the corrugated mesh is composed of weft wires in the vertical direction and warp wires in the horizontal direction, the warp wires and the weft wires comprise metal inner cores, fluoroplastic layers are wrapped outside the metal inner cores, the fluoroplastic layers are fixed at the intersection joint of the warp wires and the weft wires, and the composite wires with the fluoroplastic layers wrapped outside the metal inner cores are woven into a plane mesh; the processed mesh is heated in a heating tunnel, the heating temperature is controlled at 260-300 DEG C, the mesh advancing speed is 0.08-0.16 m / s, the plane mesh is punched according to needs, and the corrugation is formed on the surface of the mesh; the punched corrugated mesh is cut into single pieces to form the regular filler according to needs; the cut single pieces are assembled into the chemical fluoroplastic wire mesh corrugated regular filler, the fluoroplastic layers at the joint of the warp wires and the weft wires are melted and bonded together after the woven mesh is heated, the mesh has good stability, the thickness of the joint of the warp wires and the weft wires is thinned, the mesh has good flatness, the fluoroplastic layers outside the warp wires and the weft wires are more firmly combined with the metal inner cores, the metal wires and the fluoroplastic layers at the joint of the warp wires and the weft wires do not have gaps, therefore, the metal inner cores and the fluoroplastic layers at the joint of the warp wires and the weft wires are not easy to separate, and the chemical fluoroplastic wire mesh corrugated regular filler has stronger corrosion resistance; secondly, the weft wire of each corrugated mesh is reciprocally woven with multiple warp wires, the thickness of the chemical fluoroplastic wire mesh corrugated regular filler is obtained according to design requirements, the width of the mesh is designed according to the thickness of the chemical fluoroplastic wire mesh corrugated regular filler, the ratio of the mesh width to the thickness of the chemical fluoroplastic wire mesh corrugated regular filler is 1.1:1-1.3:1, a weaving device for reciprocally weaving a weft wire is selected, the composite wires with the fluoroplastic layers wrapped outside the metal inner cores are woven into a plane mesh, the transverse weft wire of the mesh is reciprocally woven with a weft wire, and there is no end at both sides of the mesh in the transverse direction, the processed mesh is heated in a heating tunnel, the heating temperature is controlled at 260-300 DEG C, and the mesh advancing speed is 0.08-0.16m / s; according to need, the plane mesh is punched to form corrugations on the surface of the mesh; according to need, the punched corrugated mesh is cut into single pieces that constitute the regular filler; the cut single pieces are assembled into the fluoroplastic wire mesh corrugated regular filler for chemical industry, the width of the mesh matches the thickness of the fluoroplastic wire mesh corrugated regular filler for chemical industry, there is no end of the metal inner core on the upper and lower sides of the fluoroplastic wire mesh corrugated regular filler for chemical industry, the corrosion resistance of the whole fluoroplastic wire mesh corrugated regular filler for chemical industry is greatly improved, and further pollution of the medium is avoided; thirdly, since the warp seal sleeve with corrosion resistance is arranged at the cut warp end, after the punched corrugated mesh is cut into single pieces that constitute the regular filler, the two cut sections of the cut single piece are close to the heating plate for baking, the baking temperature is controlled at 260-300 DEG C; after the two cut sections of the heated single piece, the outer wrapped fluoroplastic layer shrinks, and a section of the metal inner core is exposed at the warp end, the single piece with the metal inner core at the heated end is inserted into the material box with the seal sleeve material, the seal sleeve material in the material box is attached to the surface of the high-temperature metal inner core and the fluoroplastic layer; the two cut sections of the single piece with the seal sleeve material are close to the heating plate again for baking, so that the warp seal sleeve and the metal inner core are more firmly bonded, and then assembled, so that the metal inner core on the upper and lower sides of the fluoroplastic wire mesh corrugated regular filler for chemical industry is wrapped in the seal sleeve material with high corrosion resistance, and there is no metal inner core exposed on the whole fluoroplastic wire mesh corrugated regular filler for chemical industry, further improving the corrosion resistance of the fluoroplastic wire mesh corrugated regular filler for chemical industry; fourthly, since the filler body includes at least two filler parts, the filler parts constitute a cylindrical filler body, each filler part includes a plurality of corrugated meshes, and the corrugated meshes of each filler part are connected together through transverse connecting lines; when weaving the mesh, at least one warp in the weaving equipment near the middle is removed to form at least one row of wide mesh holes on the mesh; when assembling the mesh, the wide mesh holes without warp in the mesh are on the same horizontal plane, the connecting lines pass through the wide mesh holes, and then the ends of the connecting lines are tied or fixed; finally, the plurality of filler parts are arranged together to form a complete filler body, so that assembly and fixation are facilitated; if the mesh does not have the wide mesh hole, in order to fix the mesh, the needle thread needs to pass through the ordinary mesh hole, so that the fluoroplastic layer outside the metal inner core is easily damaged, and the corrosion resistance of the whole fluoroplastic wire mesh corrugated regular filler for chemical industry is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure diagram of the cross section of the fluoroplastic wire mesh corrugated regular filler for chemical industry.

[0011] Figure 2 It is a structure diagram of the corrugated mesh.

[0012] Figure 3is a cross-sectional view of the intersection of the warp and weft threads;

[0013] Figure 4 is a cross-sectional view of the warp thread;

[0014] Figure 5 is a cross-sectional view of the weft thread;

[0015] Figure 6 is a cross-sectional view of the upper edge of the mesh;

[0016] Figure 7 is a structural schematic view of the mesh with a warp thread envelope;

[0017] Figure 8 is a structural schematic view of the mesh with a missing warp thread;

[0018] Figure 9 is a structural schematic view of the assembled fluoroplastic wire mesh corrugated structured packing for chemical use. DETAILED DESCRIPTION

[0019] The structure and use principle of the fluoroplastic wire mesh corrugated structured packing for chemical use of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the structural schematic view of the fluoroplastic wire mesh corrugated structured packing for chemical use of the present application, the fluoroplastic wire mesh corrugated structured packing for chemical use of the present application comprises a plurality of corrugated meshes 3 with a wave crest line 1 and a wave trough line 2 to form a packing body 4, the wave crest line 1 and the wave trough line 2 of adjacent corrugated meshes 3 intersect at a certain angle, the corrugated mesh 3 comprises weft threads 5 in the vertical direction and warp threads 6 in the horizontal direction, the warp thread 6 comprises a metal inner core 61, and a fluoroplastic layer 62 is wrapped outside the metal inner core 61, the weft thread 5 comprises a metal inner core 51, and a fluoroplastic layer 52 is wrapped outside the metal inner core 51, and the weft thread 5 and the warp thread 6 are fixed at the intersection joint. The fluoroplastic layer 51 and the fluoroplastic layer 61 can be polytetrafluoroethylene (FEP for short, full name: fluorinated ethylene propylene copolymer), or other fluoroplastic materials.

[0021] The composite wire with fluoroplastic layer 52 and fluoroplastic layer 62 wrapped outside the metal inner core 51 and metal inner core 61 is woven into a planar mesh; the processed mesh is heated in a heating tunnel, the heating temperature is controlled at 260-300, and the mesh advancing speed is 0.08-0.16 m / s. According to the requirement, the planar mesh is punched to form corrugations on the surface of the mesh; according to the requirement, the punched corrugated mesh 3 is cut into single pieces to form regular packings; the cut single pieces are assembled into the fluoroplastic wire mesh corrugated regular packing for chemical industry. After the woven mesh is heated, the fluoroplastic layer at the junction of the warp wire 6 and weft wire 5 is melted and bonded together, the mesh stability is good, the thickness at the junction of the warp wire 6 and weft wire 5 is thinned, the mesh flatness is good; and the fluoroplastic layer 52 and fluoroplastic layer 62 outside the warp wire 6 and weft wire 5 are more firmly combined with the metal inner core 51 and metal inner core 61 inside, avoiding the separation of the metal inner core 51 and metal inner core 61 from the fluoroplastic layer 52 and fluoroplastic layer 62 under external force, and there is no gap between the metal wire and the fluoroplastic layer at the junction of the warp wire and weft wire, so the metal inner core 51 and metal inner core 61 at the junction of the warp wire 6 and weft wire 5 and the fluoroplastic layer 52 and fluoroplastic layer 62 are not easy to separate, and the corrosion resistance of the entire fluoroplastic wire mesh corrugated regular packing for chemical industry is stronger.

[0022] As shown in Figure 6 , the weft wire 5 of each corrugated mesh 3 is one reciprocally woven with multiple warp wires 6. According to the design requirement, the thickness of the fluoroplastic wire mesh corrugated regular packing for chemical industry is obtained; according to the thickness of the fluoroplastic wire mesh corrugated regular packing for chemical industry, the width of the mesh is designed, and the ratio of the mesh width to the thickness of the fluoroplastic wire mesh corrugated regular packing for chemical industry is 1.1:1-1.3:1; a reciprocally weaving equipment for one weft wire 5 is selected; the composite wire with fluoroplastic layer 52 and fluoroplastic layer 62 wrapped outside the metal inner core 51 and metal inner core 61 is woven into a planar mesh, the transverse weft wire of the mesh is reciprocally woven by one weft wire, and there is no end on both sides of the mesh in the transverse direction; the processed mesh is heated in a heating tunnel, the heating temperature is controlled at 260-300, and the mesh advancing speed is 0.08-0.16 m / s; according to the requirement, the planar mesh is punched to form corrugations on the surface of the mesh; according to the requirement, the punched corrugated mesh is cut into single pieces to form regular packings; the cut single pieces are assembled into the fluoroplastic wire mesh corrugated regular packing for chemical industry, the width of the mesh matches the thickness of the fluoroplastic wire mesh corrugated regular packing for chemical industry, and there is no end of the metal inner core 51 of the weft wire on the upper and lower sides of the fluoroplastic wire mesh corrugated regular packing for chemical industry, greatly improving the corrosion resistance of the entire fluoroplastic wire mesh corrugated regular packing for chemical industry and avoiding further pollution of the medium.

[0023] As shown in Figure 7As shown, the corrosion-resistant warp thread sleeve 9 is arranged at the end of the cut warp thread 6. After the punched corrugated mesh 3 is cut into single pieces to form a regular filler, the two cutting sections of the cut single piece are close to the heating plate for baking, and the baking temperature is controlled at 260-300 DEG C; after the two cutting sections of the heated single piece, the outer wrapped fluoroplastic layer 62 shrinks, and a section of the metal inner core 61 is exposed at the end of the warp thread 6; the single piece with the metal inner core 61 at the heated end is inserted into the material box with the sleeve material, and the sleeve material in the material box is attached to the surface of the metal inner core and the fluoroplastic layer at high temperature; the two cutting sections of the single piece dipped in the sleeve material are close to the heating plate again for baking, so that the warp thread sleeve 9 and the metal inner core 61 are more firmly bonded, and then assembled, so that the metal inner core on the upper and lower surfaces of the fluoroplastic wire mesh corrugated regular filler for chemical industry is wrapped in the sleeve material with high corrosion resistance, and there is no exposed metal inner core on the entire fluoroplastic wire mesh corrugated regular filler for chemical industry, further improving the corrosion resistance of the fluoroplastic wire mesh corrugated regular filler for chemical industry.

[0024] As Figure 8 and Figure 9 As shown, the filler body 4 includes at least two filler parts 10, and the filler parts 10 form a cylindrical filler body, each filler part 10 includes a plurality of corrugated meshes 3, and the corrugated meshes 3 of each filler part are connected together through transverse connecting lines 11. When weaving the mesh, at least one warp thread close to the middle part in the weaving equipment is removed to form at least one row of wide large mesh holes 12 on the mesh; when assembling the mesh, the large mesh holes 12 without warp threads in the mesh are on the same horizontal plane, the connecting lines 11 are passed through the large mesh holes 12, and then the ends of the connecting lines are tied or fixed to form the filler part 10, and finally a plurality of filler parts 10 are arranged together to form a complete filler body 3, so that assembly and fixation are facilitated, if the mesh does not have the wide large mesh hole, in order to fix the mesh, the needle thread needs to be passed through the ordinary mesh hole, so that the fluoroplastic layer outside the metal inner core is easily damaged, and the corrosion resistance of the entire fluoroplastic wire mesh corrugated regular filler for chemical industry is greatly reduced.

[0025] The protection scope of the utility model is not limited to the above-mentioned embodiments, as long as the structure is the same or similar to the utility model fluoroplastic wire mesh corrugated regular filler structure, it falls within the protection scope of the utility model.

Claims

1. A fluoroplastic wire mesh corrugated structured packing for chemical applications, comprising a packing body composed of multiple corrugated mesh sheets with crests and troughs, wherein the crests and troughs of adjacent corrugated mesh sheets intersect at a certain angle, characterized in that: The corrugated mesh comprises weft wires in the vertical direction and warp wires in the horizontal direction. The warp and weft wires include a metal core, and a fluoroplastic layer is wrapped around the outside of the metal core. The layers are fixed at the intersections of the warp and weft wires.

2. The chemical-grade fluoroplastic wire mesh corrugated structured packing according to claim 1, characterized in that: Each of the corrugated mesh sheets has a weft thread that is woven back and forth with multiple warp threads.

3. The chemical-grade fluoroplastic wire mesh corrugated structured packing according to claim 1 or 2, characterized in that: A corrosion-resistant warp sleeve is provided at the cut warp ends.

4. The fluoroplastic wire mesh corrugated structured packing for chemical use according to claim 3, characterized in that: The packing body includes at least two packing sections, which together form a cylindrical packing body. Each packing section includes multiple corrugated mesh sheets, which are connected together by transverse connecting lines.

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