CN112191026A

CN112191026A - PPS fiber filtering material with gradually-changed density, preparation process and filtering bag

Info

Publication number: CN112191026A
Application number: CN202011152847.3A
Authority: CN
Inventors: 李绍林; 孙淑娟; 李承润; 胡深; 黄燎辉
Original assignee: Anhui Zhongdian Environmental Protection Material Co ltd
Current assignee: Anhui Zhongdian Environmental Protection Material Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-01-08
Anticipated expiration: 2040-10-26

Abstract

The invention belongs to the technical field of PPS filter felt, in particular to a density gradient PPS fiber filter material, a preparation process and a filter bag, comprising a filter material layer, the filter material layer is composed of a first surface layer, a base cloth layer and a second surface layer through needle The thickness ratio of the first surface layer, the base fabric layer and the second surface layer is (3‑10): (1‑2): (5‑10), and the first surface layer is slightly Denier PPS fiber layer, fine denier PPS fiber layer, medium denier PPS fiber layer. The density gradient PPS fiber filter material, preparation process and filter bag, by setting the first suture line and the second suture line in the filter bag body to be one or more of PPS fiber line, PTFE fiber line, and 316L metal fiber line , to further increase the effect of high temperature resistance of the filter bag body, metal fibers have unique properties and wide uses like organic and inorganic fibers. The metal fiber has good electrical conductivity, thermal conductivity, magnetic conductivity and high temperature resistance, and the manufacturing method is relatively simple and the cost is cheap.

Description

PPS fiber filtering material with gradually-changed density, preparation process and filtering bag

Technical Field

The invention relates to the technical field of PPS filter felts, in particular to a PPS fiber filter material with gradually-changed density, a preparation process and a filter bag.

Background

The main targets of the industrial dust removal technology are to control the emission of the pollution source smoke particles and reduce the atmospheric pollution. At present, aiming at the treatment of industrial high-temperature flue gas, three methods of wet dust removal, electric dust removal and bag dust removal are mainly adopted, wherein the bag dust remover is superior to the wet dust removal and the electric dust removal in the aspects of dust removal efficiency, one-time investment cost, long-term investment cost, equipment requirement, performance and the like, and the two methods are gradually replaced to occupy the market of the mainstream industrial dust remover. The core of the bag type dust collector is a high-temperature-resistant filter material, and the performance of the high-temperature-resistant filter material is directly related to the high-efficiency, stable and reliable long-time operation of the dust collector.

The bag type dust collector is a main device for treating fine particles, the filter material is a core consumable product of the bag type dust collector, the filter cloth used by the existing filter bag is mainly vertically interwoven through PPS fibers and is limited by the performance of the PPS fibers, and the existing PPS filter bag still has the problem of low high temperature resistance, so that the filter material, the preparation process and the filter bag of the PPS fibers with gradually changed densities are needed.

Disclosure of Invention

Based on the technical problem that the existing filter bag is low in high-temperature resistance, the invention provides a PPS fiber filter material with gradually-changed density, a preparation process and the filter bag.

The invention provides a PPS fiber filtering material with gradually-changed density, which comprises a filtering material layer, wherein the filtering material layer is prepared by a first surface layer, a base cloth layer and a second surface layer through needling;

the thickness ratio of the first surface layer to the base fabric layer to the second surface layer is (3-10): (1-2): (5-10), the first surface layer is sequentially provided with a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside;

the fiber fineness of the micro-denier PPS fiber layer is (0.6-1.0D);

the fineness of the fine denier PPS fiber layer is (0.8-1.2D);

the fiber fineness of the middle-denier PPS fiber layer is (1.0-1.5D);

the mass ratio of the micro-denier PPS layer to the micro-denier PPS fiber layer to the medium-denier PPS fiber layer is (1-2): (2-4): (1-3);

the second facing comprises (1.5-2.0D) coarse denier PPS fibers.

Preferably, the microdenier PPS fiber layer comprises microdenier PPS fibers, PTFE fibers, stainless steel metal fibers; the mass ratio of the micro-denier PPS fibers to the PTFE fibers to the stainless steel metal fibers is (75-90): (1-8): (1-2);

the fine-denier PPS fiber layer comprises fine-denier PPS fibers and stainless steel metal fibers; the mass ratio of the fine denier PPS fiber to the stainless steel metal fiber is (80-90): (2-5);

the medium-denier PPS fiber layer comprises fine-denier PPS fibers and stainless steel metal fibers; the mass ratio of the medium-denier PPS fibers to the stainless steel metal fibers is (70-90): (5-10).

Preferably, the coating further comprises an impregnation layer, wherein the thickness of the impregnation layer is 120-550 microns; the dipping layer is formed by curing dipping liquid, and the dipping liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil.

Preferably, the coating layer is positioned on the outer side of the impregnation layer close to the first surface layer, the thickness of the coating layer is 30-60 microns, and the coating layer is composed of a PTFE (polytetrafluoroethylene) film.

Preferably, the base cloth layer consists of warp yarns and weft yarns; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns are formed by stranding and twisting fine denier PPS fibers and fine denier stainless steel metal fibers; the weight ratio of the fine denier PPS fiber to the fine denier stainless steel metal fiber in the weft yarn is (7-15): 1.

preferably, the base fabric layer is composed of warp yarns and weft yarns; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns comprise PPS weft yarns formed by stranding and twisting fine denier PPS fibers and metal weft yarns formed by cabling fine denier stainless steel metal fibers; the number ratio of the PPS weft yarns to the fine metal weft yarns in the weft yarns is (5-15): 1.

preferably, the preparation process of the PPS fiber filter material with gradually changed density comprises the following steps;

s1, preparing a base cloth layer, namely stranding fine denier PPS fibers and fine denier stainless steel metal fibers to form warps and wefts, and spinning to prepare the base cloth;

s2: the mass ratio of the micro-denier PPS layer, the fine-denier PPS fiber layer and the medium-denier PPS fiber layer from outside to inside is (1-2): (2-4): (1-3) air-laying a prefabricated first surface layer; air-laying the coarse denier PPS fibers of (1.5-2.0D) to prepare a second surface layer;

s3: respectively placing a prefabricated first surface layer and a prefabricated second surface layer on the upper surface and the lower surface of the base cloth layer, and manufacturing a filtering fabric by needling;

s4: after the filtration fabric is subjected to calendaring and singeing, the filtration fabric is put into a steeping liquor for steeping;

s5: and (4) carrying out high-temperature setting treatment on the impregnated filter fabric to prepare the filter material.

Preferably, the impregnation liquid in S4 comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, the ratio of the polytetrafluoroethylene emulsion to the ethanol to the methyl silicone oil is (12-16): (10-20): (20-40), and the retention time of the impregnation liquid is 0.5-2S.

The setting treatment in the S5 is sequentially carried out according to three temperature ranges of 150 ℃ at 100-: (2-3): (0.5-1).

Preferably, in S3, the needling process includes needling density of 100-.

Preferably, the filter bag made of the PPS fiber filter material with gradually-changed density comprises a filter bag body, wherein the filter bag body comprises a barrel body and a bag bottom, the barrel body is formed by sewing the filter material through a first sewing line, and the first sewing line is one or more of PPS fiber lines, PTFE fiber lines and 316L metal fiber lines;

the bag bottom and the barrel body are sewn through a second sewing line, and the second sewing line is one or more of PPS fiber line, PTFE fiber line and 316L metal fiber line;

the surface of first stylolite with the second stylolite still is equipped with the protective layer, the protective layer is any one of silica gel, hot melt adhesive.

The beneficial effects of the invention are as follows:

1. by arranging the PPS filtering material with gradient gradual change, the risk that the conventional PPS filtering bag cannot withstand electrostatic occasions is solved;

2. through setting up first surface course, base cloth layer, second surface course and first surface course by outer to interior be fine denier PPS fibrous layer, well denier PPS fibrous layer in proper order, reached and carried out gradual change formula improvement to the density of filtering material layer, increase three-dimensional filterable effect, can filter according to the dust granule of equidimension not, avoid appearing blocking problem.

3. The first suture line and the second suture line in the filter bag body are one or more of PPS fiber line, PTFE fiber line and 316L metal fiber line, so that the high-temperature resistance effect of the filter bag body is further increased, and the metal fiber has unique performance and wide application as organic and inorganic fibers. The metal fiber has good electric conduction, heat conduction, magnetic conduction and high temperature resistance, and the manufacturing method is simple and the cost price is low.

Drawings

FIG. 1 is a side cross-sectional view of a filter material layer structure of the present invention;

FIG. 2 is a front elevation view of a filter felt construction of the present invention;

FIG. 3 is a front view of a PPS fiber and ceramic fiber structure of the present invention;

FIG. 4 is a perspective view of the filter bag body construction of the present invention;

FIG. 5 is a perspective view of a retaining ring configuration of the filter bag of the present invention;

FIG. 6 is a cross-sectional view of a locking ring construction of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 5 at C in accordance with the present invention;

fig. 8 is a perspective view of the cartridge structure of the present invention.

In the figure: 1. filtering felt cloth; 2. a filter bag cartridge; 3. a filter bag body; 301. a fixing ring; 302. a connecting ring; 303. a connecting pipe; 304. locking a ring; 305. a chute; 306. a slip ring; 307. a limiting pipe; 308. sealing the air bag; 309. an inflation tube; 310. a support ring; 311. a seal ring; 312. a spring; 313. a sealing ball; 314. a sealing cover; 4. a first facing; 5. a base cloth layer; 6. a second facing; 7. an impregnation layer; 8. a film coating layer; 9. a barrel; 10. a bag bottom; 11. PPS fiber; 12. ceramic fibers.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1, a density-graded PPS fiber filter material: the filter material layer is made of a first surface layer 4, a base fabric layer 5 and a second surface layer 6 through needle punching; the thickness ratio of the first surface layer 4, the base fabric layer 5 and the second surface layer 6 is 3: 1: 5, the first surface layer 4 is a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside in sequence;

the first surface layer 4, the base cloth layer 5, the second surface layer 6 and the first surface layer (4) are sequentially a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside, so that the density of the filter material layer is gradually improved, the three-dimensional filtering effect is increased, the filter material can be filtered according to dust particles with different sizes, and the blockage problem is avoided;

the fiber fineness of the micro-denier PPS fiber layer is (0.6-1.0D);

the fineness of the fine denier PPS fiber layer is (0.8-1.2D);

the fiber fineness of the middle-denier PPS fiber layer is (1.0-1.5D);

the mass ratio of the micro-denier PPS layer to the fine-denier PPS fiber layer to the medium-denier PPS fiber layer is 1: 2: 1;

the second facing comprised (1.5-2.0D) coarse denier PPS fiber.

The micro-denier PPS fiber layer comprises micro-denier PPS fibers, PTFE fibers and stainless steel metal fibers; the mass ratio of the micro-denier PPS fibers to the PTFE fibers to the stainless steel metal fibers is 75: 1: 1;

the fine-denier PPS fiber layer comprises fine-denier PPS fibers and stainless steel metal fibers; the mass ratio of the fine denier PPS fiber to the stainless steel metal fiber is 80: 2;

the medium-denier PPS fiber layer is composed of medium-denier PPS fibers and stainless steel metal fibers; the mass ratio of the medium-denier PPS fibers to the stainless steel metal fibers is 70: 5.

through setting up first surface course 4 and being little denier PPS fibrous layer, fine denier PPS fibrous layer, well denier PPS fibrous layer by outside to inside in proper order, stainless steel metal fiber accounts for than from outside to inside fibrous layer and progressively increases, the static elimination of static occasion of being convenient for.

The thickness of the impregnation layer 7 is 120 microns; the impregnation layer 7 is formed by curing impregnation liquid, wherein the impregnation liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, and certainly the impregnation liquid also comprises deionized water, and the deionized water accounts for 80% of the total mass of the impregnation liquid.

The coating layer 8 is located on the outer side of the impregnation layer close to the first surface layer 4, the thickness of the coating layer 8 is 30 micrometers, and the coating layer 8 is composed of a PTFE (polytetrafluoroethylene) film.

The base cloth layer 5 consists of warp and weft; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns are formed by stranding and twisting fine denier PPS fibers and fine denier stainless steel metal fibers; the weight ratio of the fine denier PPS fiber to the fine denier stainless steel metal fiber in the weft yarn is 7: 1;

or the base cloth layer 5 consists of warp and weft; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns comprise PPS weft yarns formed by stranding and twisting fine denier PPS fibers and metal weft yarns formed by cabling fine denier stainless steel metal fibers; the number ratio of the PPS weft yarns to the fine metal weft yarns in the weft yarns is 5: 1.

example two

Referring to fig. 1, a density-graded PPS fiber filter material: the fabric comprises a filter material layer, a dipping layer 7 and a film coating layer 8, wherein the filter material layer is made of a first surface layer 4, a base fabric layer and a second surface layer 6 through needle punching; the thickness ratio of the first surface layer 4, the base fabric layer 5 and the second surface layer 6 is 10: 2:10, the first surface layer is a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside in sequence;

the fiber fineness of the micro-denier PPS fiber layer is (0.6-1.0D);

the fineness of the fine denier PPS fiber layer is (0.8-1.2D);

the fiber fineness of the middle-denier PPS fiber layer is (1.0-1.5D);

the mass ratio of the micro-denier PPS layer to the fine-denier PPS fiber layer to the medium-denier PPS fiber layer is 2: 4: 3;

the second facing comprised (1.5-2.0D) coarse denier PPS fiber.

The micro-denier PPS fiber layer comprises micro-denier PPS fibers, PTFE fibers and stainless steel metal fibers; the mass ratio of the micro-denier PPS fibers to the PTFE fibers to the stainless steel metal fibers is 90: 8: 2;

the fine-denier PPS fiber layer comprises fine-denier PPS fibers and stainless steel metal fibers; the mass ratio of the fine denier PPS fiber to the stainless steel metal fiber is 90: 5;

the medium-denier PPS fiber layer comprises medium-denier PPS fibers and stainless steel metal fibers; the mass ratio of the medium-denier PPS fibers to the stainless steel metal fibers is 90: 10.

through setting up first surface course 4 and being little denier PPS fibrous layer, fine denier PPS fibrous layer, well denier PPS fibrous layer by outside to interior in proper order, from outside to interior fibrous layer increase gradually, the static elimination of static occasion of being convenient for.

The thickness of the impregnation layer 7 is 550 microns; the dipping layer 7 is formed by curing dipping liquid, wherein the dipping liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, and certainly the dipping liquid also comprises deionized water, and the deionized water accounts for 85% of the total mass of the dipping liquid.

Of course, in this example, the thickness was increased as compared with the first example, and therefore, the coating layer 8 was not required to satisfy the filtration accuracy requirement.

The base cloth layer 5 consists of warp and weft; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns are formed by stranding and twisting fine denier PPS fibers and fine denier stainless steel metal fibers; the weight ratio of the fine denier PPS fiber to the fine denier stainless steel metal fiber in the weft yarn is 15: 1;

or the base cloth layer 5 consists of warp and weft; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns comprise PPS weft yarns formed by stranding and twisting fine denier PPS fibers and metal weft yarns formed by cabling fine denier stainless steel metal fibers; the number ratio of the PPS weft yarns to the fine metal weft yarns in the weft yarns is 15: 1.

EXAMPLE III

Referring to fig. 1, a density-graded PPS fiber filter material: the filter material layer is made of a first surface layer 4, a base fabric layer 5 and a second surface layer 6 through needle punching; the thickness ratio of the first surface layer 4, the base fabric layer 5 and the second surface layer 6 is 7: 1.5: 8, the first surface layer 4 is a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside in sequence;

the fiber fineness of the micro-denier PPS fiber layer is (0.6-1.0D);

the fineness of the fine denier PPS fiber layer is (0.8-1.2D);

the fiber fineness of the middle-denier PPS fiber layer is (1.0-1.5D);

the mass ratio of the micro-denier PPS layer to the fine-denier PPS fiber layer to the medium-denier PPS fiber layer is 1.5: 3: 2;

the second facing comprised (1.5-2.0D) coarse denier PPS fiber.

The micro-denier PPS fiber layer comprises micro-denier PPS fibers, PTFE fibers and stainless steel metal fibers; the mass ratio of the micro-denier PPS fibers to the PTFE fibers to the stainless steel metal fibers is 83: 5: 1.5;

the fine-denier PPS fiber layer comprises fine-denier PPS fibers and stainless steel metal fibers; the mass ratio of the fine denier PPS fiber to the stainless steel metal fiber is 85: 3;

the medium-denier PPS fiber layer comprises medium-denier PPS fibers and stainless steel metal fibers; the mass ratio of the medium-denier PPS fibers to the stainless steel metal fibers is 80: 7.

The thickness of the impregnation layer 7 is 250 microns; the dipping layer 7 is formed by curing dipping liquid, wherein the dipping liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, and certainly the dipping liquid also comprises deionized water, and the deionized water accounts for 75% of the total mass of the dipping liquid. .

The coating layer 8 is located on the outer side of the dipping layer close to the first surface layer, the thickness of the coating layer 8 is 45 micrometers, and the coating layer 8 is composed of a PTFE (polytetrafluoroethylene) film.

or the base cloth layer 5 consists of warp and weft; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns comprise PPS weft yarns formed by stranding and twisting fine denier PPS fibers and metal weft yarns formed by cabling fine denier stainless steel metal fibers; the number ratio of the PPS weft yarns to the fine metal weft yarns in the weft yarns is 10: 1.

example four

Referring to fig. 1, a preparation process of a PPS fiber filter material with gradually-changed density comprises the following steps;

s1, preparing a base cloth layer 5, namely stranding fine denier PPS fibers and fine denier stainless steel metal fibers to form warps and wefts, and spinning to prepare the base cloth;

s2: the mass ratio of the micro-denier PPS layer, the micro-denier PPS fiber layer and the medium-denier PPS fiber layer from outside to inside is 1: 2:1 air-laying to prefabricate a first surface layer; air-laying the coarse denier PPS fibers of (1.5-2.0D) to prepare a second surface layer;

S3, the pre-needling stage in the needling process is 100 needles/, and the main needling stage is 150 needles/;

in S4, the impregnation liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, wherein the ratio of the polytetrafluoroethylene emulsion to the ethanol to the methyl silicone oil is 12:10:20, and the impregnation liquid also comprises deionized water, wherein the deionized water accounts for 75% of the total mass of the impregnation liquid. The residence time of the impregnation solution was 0.5 s.

The setting treatment in the S5 is sequentially carried out according to three temperature ranges of 150 ℃ at 100-: 2: 0.5.

EXAMPLE five

Referring to fig. 7, the preparation process of the PPS fiber filtering material with gradually changed density comprises the following steps;

s2: the mass ratio of the micro-denier PPS layer, the micro-denier PPS fiber layer and the medium-denier PPS fiber layer from outside to inside is 2: 4: 3 air-laying to prefabricate a first surface layer 4; air-laying the coarse denier PPS fibers of (1.5-2.0D) to prepare a second facing layer 6;

s3: respectively placing a prefabricated first surface layer 4 and a prefabricated second surface layer 6 on the upper surface and the lower surface of the base fabric layer 5, and manufacturing a filtering fabric by needling;

S3, the pre-needling stage in the needling process is 150 needles/, and the main needling stage is 300 needles/;

in S4, the impregnation liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, wherein the ratio of the polytetrafluoroethylene emulsion to the ethanol to the methyl silicone oil is 16:20:40, and the impregnation liquid also comprises deionized water, wherein the deionized water accounts for 85% of the total mass of the impregnation liquid. The residence time of the impregnation solution was 2 s.

In S5, the setting treatment in S5 is performed sequentially according to three temperature ranges of 130-: 3: 1.

EXAMPLE six

s2: the mass ratio of the micro-denier PPS layer, the micro-denier PPS fiber layer and the medium-denier PPS fiber layer from outside to inside is 1.5: 3: 2 air-laying to prefabricate a first surface layer 4; air-laying the coarse denier PPS fibers of (1.5-2.0D) to prepare a second facing layer 6;

S3, the pre-needling stage in the needling process is 125 needles/, and the main needling stage is 230 needles/;

in S4, the impregnation liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, wherein the ratio of the polytetrafluoroethylene emulsion to the ethanol to the methyl silicone oil is 14:15:32, and the impregnation liquid also comprises deionized water, wherein the deionized water accounts for 78% of the total mass of the impregnation liquid. The residence time of the impregnation solution was 0.8 s.

In S5, the setting treatment is sequentially carried out at three temperature intervals of 150 ℃ at 130-: 2.4: 0.8.

EXAMPLE seven

Referring to fig. 1 and 8, a filter bag made of PPS fiber filter material with gradually-changed density comprises a filter bag body;

the filter bag body comprises a barrel body 9 and a bag bottom 10, the barrel body is formed by sewing the filter material through a first sewing line, and the first sewing line is one or more of PPS fiber line, PTFE fiber line and 316L metal fiber line;

the bag bottom 10 and the barrel body 9 are sewn through a second sewing line, and the second sewing line is one or more of PPS fiber line, PTFE fiber line and 316L metal fiber line;

Example eight

Referring to fig. 2-7, the filter bag made of the PPS fiber filter material with gradually-changed density comprises a filter felt cloth 1, a filter bag barrel 2 and a filter bag body 3, wherein the filter felt cloth 1 is made of PPS fibers 11, ceramic fibers 12, super-adsorption fibers and chitin fibers;

the filter bag cylinder 2 is made of filter felt cloth 1 by sewing;

the filter bag cylinder 2 is made by sewing the filter felt cloth 1 into a cylindrical shape with a bottom by a sewing machine;

the filter bag body 3 consists of a filter bag cylinder 2 and a connecting mechanism;

the preparation process of the filter felt cloth 1 comprises the following steps:

step one, mutually interweaving two PPS fibers 11 and two ceramic fibers 12 in a shape like a Chinese character 'mi' to prepare a base framework;

step two, the ceramic fiber 12, the super-adsorption fiber and the PPS fiber 11 are sequentially woven on the base framework in a staggered mode to manufacture base cloth;

step three, uniformly mixing the PPS fibers 11 and the chitin fibers, and then manufacturing a mixed filtering fiber layer by using an air-laid machine;

step four, lapping and stacking the mixed fiber layers on the upper surface and the lower surface of the base cloth, and carrying out needle punching bonding on the mixed fiber layers and the upper surface and the lower surface of the base cloth through a needle punching machine to prepare a filtering felt cloth 1;

tensioning, namely stretching the filtering felt cloth 1 prepared in the step four by a tensioning machine;

tensioning the filter felt cloth 1 along the warp direction, wherein the width of the tensioned filter felt cloth 1 is increased by 15-20%;

step six, putting the tensioned filter felt cloth 1 into the mixed emulsion for dipping;

in the sixth step, the mixed emulsion is 12-16% of polytetrafluoroethylene emulsion, 1-2% of coupling agent, 2-4% of methyl silicone oil and the balance of water, and the coupling agent is silane coupling agent;

step seven, drying and high-temperature shaping the impregnated filter felt cloth 1;

in the seventh step, the drying temperature is 100-160 ℃, the drying time is 0.5-1 hour, the high-temperature setting temperature is 190-240 ℃, and the setting time is 8-20 minutes;

the filter bag is characterized in that two PPS fibers 11 and two ceramic fibers 12 are mutually interwoven in a shape like a Chinese character 'mi' to form a base framework, then the ceramic fibers 12, the super-adsorption fibers and the PPS fibers 11 are sequentially interwoven on the base framework in a staggered mode to form base cloth, when the filter bag is used, the ceramic fibers 12 have the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical shock resistance, the super-adsorption fibers can better adsorb particulate matters in smoke and water vapor generated in the cooling process of high-temperature smoke, and better high temperature resistance and filtering effect are achieved, so that the problem that the existing filter bag is lower in high temperature resistance is solved;

the filter bag body 3 comprises a fixing ring 301;

further, the fixing ring 301 is fixedly connected with the surface of the mounting hole of the bag type dust collector through a sealant when in use, so that a better sealing connection effect is achieved;

the lower surface of the fixed ring 301 is fixedly connected with a connecting ring 302, the surface of the connecting ring 302 is fixedly connected with a connecting pipe 303, the surface of the connecting pipe 303 is conical, the connecting mechanism comprises a locking ring 304, the inner wall of the locking ring 304 is in threaded connection with the surface of the connecting ring 302, the inner wall of the filter bag barrel 2 is in sliding connection with the surface of the connecting pipe 303, the surface of the locking ring 304 is fixedly provided with a sliding groove 305, the inner wall of the sliding groove 305 is T-shaped, the inner wall of the sliding groove 305 is in sliding connection with a sliding ring 306, the surface of the sliding ring 306 extends to the lower surface of the locking ring 304, the surface of the sliding ring 306 is fixedly connected with a limiting pipe 307, the surface inner wall of the limiting pipe 307 is conical;

the inner wall of the limiting pipe 307 is fixedly connected with a sealing air bag 308, the surface of the sealing air bag 308 is inserted with the surface of the filter bag barrel 2, the inner wall of the sealing air bag 308 is fixedly communicated with an inflation pipe 309, one end of the inflation pipe 309 penetrates through and extends to the surface of the limiting pipe 307, the inner wall of the inflation pipe 309 is respectively and fixedly connected with a support ring 310 and a sealing ring 311, the surface of the support ring 310 is fixedly connected with a spring 312, one end of the spring 312 is fixedly connected with a sealing ball 313, the surface of the sealing ball 313 is inserted with the inner wall of the sealing ring 311, the inner wall of one end of the inflation pipe 309 is in threaded connection with a;

by arranging the filter bag body 3 consisting of the filter bag barrel 2 and the connecting mechanism, when in use, the filter bag body 3 is separately installed with the filter bag barrel 2 by adopting the installation connecting mechanism, when in installation, the surface of the fixing ring 301 is inserted with the surface of the installation hole of the bag type dust collector, then the inner wall of the filter bag barrel 2 is inserted with the surface of the connecting pipe 303, then the inner wall of the limit pipe 307 is inserted with the surface of the filter bag barrel 2, the filter bag barrel 2 is fixedly connected with the connecting pipe 303 by the threaded connection of the locking ring 304 and the surface of the connecting ring 302, finally the sealing cover 314 is opened, the sealing ball 313 is pressed down to separate the surface of the sealing ball 313 from the inner wall of the sealing ring 311, the sealing air bag 308 is inflated by the inflating pipe 309, the sealing air bag 308 is inflated and expanded, the surface of the sealing air bag 308 is inserted with the surface of the filter bag barrel 2 and the inner wall of the, carry out further sealed to spacing pipe 307 and filter bag section of thick bamboo 2, after aerifing the completion, loosen ball seal 313, under the effort of spring 312, ball seal 313 is automatic to be sealed with the inner wall grafting of sealing ring 311, then carry out threaded connection with gas tube 309 with sealed lid 314 and sealed, reached the installation of being convenient for and better will cross the filter bag and carry out the sealed effect of installation with the dust remover, thereby it is low to have solved current filter bag installation skeleton reuse rate, cause the wasting of resources and the inconvenient problem of installation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The PPS fiber filtering material with the gradually-changed density comprises a filtering material layer, wherein the filtering material layer is made of a first surface layer (4), a base fabric layer (5) and a second surface layer (6) through needle punching; the method is characterized in that:

the thickness ratio of the first surface layer (4), the base fabric layer (5) and the second surface layer (6) is (3-10): (1-2): (5-10), the first surface layer (4) is a micro-denier PPS fiber layer, a fine-denier PPS fiber layer and a medium-denier PPS fiber layer from outside to inside in sequence;

the fiber fineness of the micro-denier PPS fiber layer is (0.6-1.0D);

the fineness of the fine denier PPS fiber layer is (0.8-1.2D);

the fiber fineness of the middle-denier PPS fiber layer is (1.0-1.5D);

the second facing comprises (1.5-2.0D) coarse denier PPS fibers.

2. The filter material of PPS fiber of claim 1, wherein:

the micro-denier PPS fiber layer comprises micro-denier PPS fibers, PTFE fibers and stainless steel metal fibers; the mass ratio of the micro-denier PPS fibers to the PTFE fibers to the stainless steel metal fibers is (75-90): (1-8): (1-2);

the medium-denier PPS fiber layer comprises medium-denier PPS fibers and stainless steel metal fibers; the mass ratio of the medium-denier PPS fibers to the stainless steel metal fibers is (70-90): (5-10).

3. The filter material of PPS fiber of claim 1, wherein:

the coating further comprises an impregnation layer (7), wherein the thickness of the impregnation layer (7) is 120-550 microns; the impregnation layer (7) is formed by solidifying impregnation liquid, and the impregnation liquid comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil.

4. The filter material of PPS fiber of claim 1, wherein: the coating is characterized by further comprising a coating layer (8), wherein the coating layer (8) is located on the outer side of the dipping layer close to the first surface layer (4), the thickness of the coating layer (8) is 30-60 micrometers, and the coating layer (8) is composed of a PTFE (polytetrafluoroethylene) film.

5. The filter material of PPS fiber of claim 1, wherein: the base cloth layer (5) consists of warp yarns and weft yarns; the warp yarns are formed by stranding and twisting fine denier PPS fibers; the weft yarns are formed by stranding and twisting fine denier PPS fibers and fine denier stainless steel metal fibers; the weight ratio of the fine denier PPS fiber to the fine denier stainless steel metal fiber in the weft yarn is (7-15): 1.

6. the process for preparing a density-graded PPS fiber filtering material as claimed in claims 1-5, wherein: comprises the following steps;

s1, preparing a base cloth layer (5), namely stranding fine denier PPS fibers and fine denier stainless steel metal fibers to form warps and wefts, and spinning to prepare the base cloth;

s3: respectively placing a prefabricated first surface layer (4) and a prefabricated second surface layer (6) on the upper surface and the lower surface of the base fabric layer (5), and manufacturing a filtering fabric by needling;

7. The process for preparing the density-graded PPS fiber filtering material as claimed in claim 6, wherein: the impregnating solution in the S4 comprises polytetrafluoroethylene emulsion, ethanol and methyl silicone oil, the proportion of the polytetrafluoroethylene emulsion to the ethanol to the methyl silicone oil is (12-16) to (10-20) to (20-40), and the retention time of the impregnating solution is 0.5-2S.

8. The process for preparing the density-graded PPS fiber filtering material as claimed in claim 6, wherein: the setting treatment in the S5 is sequentially carried out according to three temperature ranges of 150 ℃ at 100-: (2-3): (0.5-1).

9. The process for preparing the density-graded PPS fiber filtering material as claimed in claim 7, wherein: in the S3, the needling process includes needling density of 100-.

10. A filter bag made of PPS fiber filter material with gradually-changed density, which is prepared according to the preparation process of any one of claims 6 to 8, and is characterized in that: comprises a filter bag body;

the filter bag body comprises a barrel body (9) and a bag bottom (10), the barrel body is formed by sewing the filter material through first sewing threads, and the first sewing threads are one or more of PPS fiber threads, PTFE fiber threads and 316L metal fiber threads;

the bag bottom (10) and the barrel body (9) are sewn through a second sewing line, and the second sewing line is one or more of PPS fiber line, PTFE fiber line and 316L metal fiber line;