High-strength, temperature-resistant and corrosion-resistant pollutant removal fiber and self-heating melting type manufacturing method

Abstract

The invention discloses a high-strength, temperature-resistant and corrosion-resistant pollutant removal fiber and a self-heating melting type manufacturing method, and belongs to the technical field of manufacturing of filter material fibers for bag type dust collectors. At present, a functional filter material is mainly formed by carrying out a post-treatment process on the filter material, the invention provides a manufacturing method of a fiber with a pollutant removal function, and the fiber is prepared by wrapping a molten glass fiber for wire drawing with a catalyst with a denitration catalysis function and / or a dioxin removal function. A device adopted by the self-heating melting type manufacturing method specifically comprises a glass kiln, a spinneret bushing, powder supply equipment, a high-voltage direct-current power supply, a concentric-square-shaped powder supply cavity, impregnating compound coating equipment and a wire drawing guide wheel. The fiber prepared by the invention is used for preparing a filter material for a bag type dust collector, and can be used for simultaneously removing particulate matters and harmful substances such as nitrogen oxides and dioxin in flue gas.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing filter materials for bag filters, and particularly relates to a high-strength, temperature-resistant, corrosion-resistant pollutant-removing fiber and a self-heating and melting manufacturing method therefor. Background Art

[0002] Dioxin is a chlorinated aromatic compound, which is a collective term for two types of substances composed of 75 homologues of polychlorinated dibenzo-p-dioxins (PCDDs) and 135 homologues of polychlorinated dibenzofurans (PCDFs). Dioxin is highly toxic and carcinogenic to the ecosystem, affects the secretion of endocrine disruptors in organisms, causes the interruption of cell development and growth, and affects neurodevelopment and the reproductive system. Due to its persistent toxicity and difficulty in biodegradation, the research on how to limit the emission of dioxin into the atmospheric environment is an important topic for current environmental protection researchers.

[0003] The research and application of using bag filters to simultaneously remove multiple pollutants from flue gas are underway, but currently, the production of functional filter materials is limited to post-treatment processes such as impregnation and coating. The filter materials manufactured by this process have poor stability, and the treatment of chemical waste and other links also increase the environmental protection costs of enterprises.

[0004] In addition to industrial dust, NO x is also one of the main air pollutants in China. Under the general trend of green development, the state and various provinces and cities have successively introduced more stringent emission standards. Taking the cement industry as an example, in many places, the emissions of dust and nitrogen oxides are required to be no higher than 10 mg / m 3 and 50 mg / m 3 . The organic combination of denitrification technology and bag filter technology is the most promising denitrification technology solution at present.

[0005] Glass fiber has extremely high tensile strength and heat resistance, and low cost. The filter materials for bag filters made of glass fiber have been continuously valued by the environmental protection industry for many years. However, its corrosion resistance is limited and its folding resistance is poor, resulting in limited application of glass fiber filter materials.

[0006] Polytetrafluoroethylene (PTFE for short) is a high-molecular organic material with excellent comprehensive performance such as mechanical toughness, chemical stability, corrosion resistance, and anti-aging property. However, it has a high cost and is prone to creep at high temperatures. The flexibility and high corrosion resistance of polytetrafluoroethylene can be fully utilized to coat a layer of polytetrafluoroethylene cortex on glass fiber, thereby improving the folding resistance and corrosion resistance strength of glass fiber, and at the same time having excellent high-temperature resistance. The consumption of this composite core-sheath fiber PTFE is also much lower than that of pure PTFE fiber, saving a large amount of cost compared with manufacturing pure PTFE fiber.

[0007] Currently, for the catalytic degradation of NO x or dioxin as the target pollutant, most methods use separate catalytic degradation. For NO x mainly titanium-based catalysts or manganese-based catalysts are used, and for dioxin, mainly cerium-based catalysts are used for removal. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology, the present invention provides a high-strength, temperature-resistant, and corrosion-resistant pollutant-removing fiber and a self-heating melting manufacturing method. This kind of fiber has the function of denitrification and / or dioxin removal. By wrapping the catalyst with the function of denitrification and / or dioxin removal on the outer surface of the fiber to form a functional cortex, this fiber can be applied to the preparation of bag-type dust removal environmental protection materials, and simultaneously achieve denitrification and dioxin removal during the particulate matter capture process of flue gas.

[0009] A self-heating melting processing device for high-strength, temperature-resistant, and corrosion-resistant pollutant-removing fiber specifically includes a glass furnace, a spinneret plate, a powder supply device, a high-voltage DC power supply, a loop powder supply chamber, a sizing agent coating device, and a wire drawing guide wheel;

[0010] A spinneret plate is arranged at the discharge port of the glass furnace, and a loop powder supply chamber is arranged below the spinneret plate. The glass furnace, the loop powder supply chamber, the sizing agent coating device, and the wire drawing guide wheel are sequentially distributed in the height direction, and the wire drawing guide wheel is arranged obliquely below the sizing agent coating device; one side of the loop powder supply chamber is communicated with the powder supply device, and a high-voltage DC power supply is arranged on the other side of the loop powder supply chamber;

[0011] The spinneret plate is electrically connected to the positive pole of the high-voltage DC power supply, the loop powder supply chamber is electrically connected to the negative pole of the high-voltage DC power supply, and the high-voltage DC power supply is grounded;

[0012] The glass furnace is a tank furnace or a crucible furnace.

[0013] The loop powder supply chamber is a hollow structure, and a powder outlet slit is arranged on its inner side for spraying and attaching mixed dust.

[0014] A self-heating melting manufacturing method for high-strength, temperature-resistant, and corrosion-resistant pollutant-removing fibers, realized by using the above device, specifically includes the following steps:

[0015] (1) Continuously feed the fully dispersed PTFE mixed dust in the powder supply equipment into the loop-shaped powder supply chamber. Connect the spinneret and the loop-shaped powder supply chamber to the positive and negative electrodes of a high-voltage DC power supply respectively. Under the action of static electricity, the negatively charged mixed dust adheres to the glass fiber pulled out from the spinneret of the glass furnace to form a glass fiber bundle.

[0016] The PTFE mixed dust is prepared by mixing catalyst particles into the PTFE powder. The catalyst particles are selected from one or two of V2O5 / TiO2 and CeO2 / TiO2.

[0017] (2) After the glass fiber bundle passing through the loop-shaped powder supply chamber is cooled, it is infiltrated on the coating wheel of the sizing agent coating equipment. The PTFE in the mixed dust solidifies on the glass fiber to form a cladding, and the catalyst particles in the mixed dust adhere to the glass fiber to form a high-temperature-resistant skin-core fiber with denitrification function and / or dioxin removal function, which is the pollutant-removing fiber.

[0018] Among them:

[0019] In the step (1), when the PTFE mixed dust is V2O5 / TiO2 catalyst particles mixed into the PTFE powder, the prepared pollutant-removing fiber has denitrification function; when the PTFE mixed dust is CeO2 / TiO2 catalyst particles mixed into the PTFE powder, the prepared pollutant-removing fiber has dioxin removal function; when the PTFE mixed dust is V2O5 / TiO2 and CeO2 / TiO2 two types of catalyst particles mixed into the PTFE powder, the prepared pollutant-removing fiber has both denitrification and dioxin removal functions.

[0020] The preparation method of the PTFE mixed dust for the high-temperature-resistant skin-core fiber with denitrification function is as follows:

[0021] Add titanium dioxide and vanadium pentoxide into the mixing container at a mass ratio of 10:1 to obtain a mixed powder. Then add metal oxides with a mass fraction of 5% - 20% of the mixed powder to prepare a mixed catalyst powder. Adjust the temperature to 80°C - 120°C and mix thoroughly until the materials are homogenized. The mixed materials are vacuum dried at 120°C - 150°C for 6h - 12h, and then calcined at a high temperature of 1200°C - 1400°C for 240min - 300min to obtain V2O5-MnO2 / TiO2 catalyst particles. After tableting, crushing, and sieving, take the particles of 40 - 50 meshes and mix them evenly with the PTFE powder at a mass ratio of 1:(6 - 10) to obtain the PTFE mixed dust.

[0022] The preparation method of the PTFE mixed dust used in the high-temperature resistant skin-core fiber with dioxin removal function is as follows:

[0023] Mix anatase TiO2 and cerium nitrate hexahydrate in a mass ratio of 1:20, and uniformly mix them to form a mixed powder; Immerse the activated carbon powder with a particle size of more than 200 meshes in a 95% triethylamine solution, and the mass ratio of activated carbon to triethylamine solution is 1:9. After mixing the mixed powder, activated carbon, and the solution prepared with triethylamine in a mass ratio of 1:10, add purified water and extremely fine silica powder with a particle size of 50nm - 150nm to adjust to a paste state, place it in a vacuum drying oven, and dry it at 0.9 Mpa and 150 °C to obtain a mixed dried product;

[0024] Calcine the mixed dried product at 400 °C for 4 hours to obtain a CeO2 / TiO2 catalyst. After tabletting, crushing, and sieving, take the catalyst particles with a mesh size of 40 - 50 meshes, and uniformly mix them with PTFE powder in a mass ratio of 1:8 to obtain PTFE mixed dust.

[0025] The preparation method of the PTFE mixed dust used in the high-temperature resistant skin-core fiber with denitrification and dioxin removal functions is as follows:

[0026] Adopt the method of equal-volume impregnation. Under the condition of water bath heating at 65 °C, take ammonium metavanadate and cerium nitrate hexahydrate with a mass ratio of 1:1, add deionized water and stir; After the two solutions are fully mixed, dilute them to 0.5 mol / L - 1 mol / L, place the TiO2 carrier into the solution and fully impregnate it. After vacuum drying at 120 °C - 180 °C for 6h - 12h and high-temperature calcination at 1000 °C - 1200 °C for 240 min, prepare a V2O5-CeO2 / TiO2 catalyst;

[0027] The obtained catalyst is tableted, crushed, and sieved. Take the particles with a mesh size of 50 - 200 meshes and mix them evenly into the PTFE powder at a proportion of 10% - 12% by mass fraction to obtain PTFE mixed dust. [[ID=??]]

[0028] A high-strength, temperature-resistant, corrosion-resistant pollutant-removing fiber is prepared by the above method.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The present invention utilizes the heat generated in the glass fiber drawing process to manufacture a functional skin layer in a self-heating and melting manner, which is economical, energy-saving, carbon-reducing, and environmentally friendly. The prepared fiber has the characteristics of high temperature resistance, high strength, corrosion resistance, and the function of removing pollutants. Brief Description of the Drawings

[0031] Figure 1 Schematic structural diagram of a pollutant-removing fiber processing device of the present invention (the glass furnace uses a crucible furnace); It should be noted that there seems to be an error in the original text where the "??" is in ID=17. It is likely a placeholder that should have a proper ID number. This translation is based on the provided text as accurately as possible.

[0032] Wherein: 1 - glass melting furnace, 2 - spinneret plate, 3 - powder feeding device, 4 - high-voltage DC power supply, 5 - loop-shaped powder feeding cavity, 6 - sizing coating device, 7 - wire drawing guide pulley;

[0033] Figure 2 Schematic structural diagram of a fiber processing device for removing pollutants of the present invention (the glass melting furnace adopts a tank furnace);

[0034] Wherein: 1 - glass melting furnace, 2 - spinneret plate, 3 - powder feeding device, 4 - high-voltage DC power supply, 5 - loop-shaped powder feeding cavity, 6 - sizing coating device, 7 - wire drawing guide pulley;

[0035] Figure 3 Axonometric view of the loop-shaped powder feeding cavity of the present invention;

[0036] Figure 4 Front view of the loop-shaped powder feeding cavity of the present invention;

[0037] Figure 5 Side view of the loop-shaped powder feeding cavity of the present invention;

[0038] Figure 6 Top view of the loop-shaped powder feeding cavity of the present invention. Detailed implementation mode

[0039] Example 1

[0040] A self-heating melting type processing device for high-strength, temperature-resistant and corrosion-resistant pollutant-removing fibers, specifically including a glass melting furnace 1, a spinneret plate 2, a powder feeding device 3, a high-voltage DC power supply 4, a loop-shaped powder feeding cavity 5, a sizing coating device 6 and a wire drawing guide pulley 7; when the glass melting furnace 1 adopts a crucible furnace, the schematic structural diagram of the device is as Figure 1 shown; when the glass melting furnace 1 adopts a tank furnace, the schematic structural diagram of the device is as Figure 2 shown, wherein two sets of spinneret plates 2, powder feeding devices 3, loop-shaped powder feeding cavities 5, sizing coating devices 6 and wire drawing guide pulleys 7 are provided.

[0041] A spinneret plate 2 is arranged at the discharge port of the glass melting furnace 1, and a loop-shaped powder feeding cavity 5 is arranged below the spinneret plate 2. The glass melting furnace 1, the loop-shaped powder feeding cavity 5, the sizing coating device 6 and the wire drawing guide pulley 7 are sequentially distributed in the height direction, and the wire drawing guide pulley 7 is arranged obliquely below the sizing coating device 6.

[0042] The spinneret plate 2 is electrically connected to the positive pole of the high-voltage DC power supply 4, the loop-shaped powder feeding cavity 5 is electrically connected to the negative pole of the high-voltage DC power supply 4, and the high-voltage DC power supply 4 is grounded.

[0043] The loop-shaped powder feeding cavity 5 is a hollow structure, and its axonometric view is as Figure 3 shown, and its front view is as Figure 4As shown in the side view in Figure 5 As shown in the top view in Figure 6 As shown. An outlet powder slit is provided inside the loop-shaped powder supply chamber 5, and mixed dust is sprayed onto the glass fiber drawn out by the spinneret plate 2 through the outlet powder slit. One side of the loop-shaped powder supply chamber 5 is communicated with the powder supply device 3, and a high-voltage DC power supply 4 is provided on the other side of the loop-shaped powder supply chamber 5.

[0044] Example 2

[0045] In this example, the glass furnace 1 is a crucible furnace.

[0046] A self-heating melting manufacturing method of high-strength, temperature-resistant and corrosion-resistant pollutant-removing fibers is realized by using the device described in Example 1, and specifically includes the following steps:

[0047] (1) Titanium dioxide, vanadium pentoxide, tungsten trioxide and manganese oxide are added into a mixing container according to a mass ratio of 10:1:1:1, the temperature is adjusted to 80 °C, and they are fully mixed until the materials are homogenized. The mixed materials are vacuum dried at 120 °C for 6 h, and then calcined at a high temperature of 1200 °C for 240 min to obtain V2O5-MnO2 / TiO2 catalyst particles. After being tableted, crushed and sieved, 40-mesh to 50-mesh particles are taken and mixed evenly with PTFE powder in a mass ratio of 1:8 to obtain PTFE mixed dust, which is placed in the powder supply device 3.

[0048] The fully dispersed PTFE mixed dust in the powder supply device 3 is continuously fed into the loop-shaped powder supply chamber 5. The spinneret plate 2 and the loop-shaped powder supply chamber 5 are respectively connected to the positive and negative electrodes of the high-voltage DC power supply 4. The negatively charged mixed dust adheres to the glass fiber drawn out by the spinneret plate 2 of the glass furnace 1 under the action of static electricity to form a glass fiber bundle;

[0049] (2) After being cooled, the glass fiber bundle passing through the loop-shaped powder supply chamber 5 is infiltrated on the coating wheel of the sizing agent coating device 6. The PTFE in the mixed dust solidifies on the glass fiber to form a cladding, and the catalyst particles in the mixed dust adhere to the glass fiber to form a high-temperature skin-core fiber with denitrification function, which is the pollutant-removing fiber.

[0050] Example 3

[0051] In this example, the glass furnace 1 is a crucible furnace.

[0052] A self-heating melting manufacturing method of high-strength, temperature-resistant and corrosion-resistant pollutant-removing fibers is realized by using the device described in Example 1, and specifically includes the following steps:

[0053] (1) Mix anatase TiO₂ and cerium nitrate hexahydrate in a mass ratio of 1:20 to form a mixed powder after uniform mixing. Immerse activated carbon powder with a mesh size above 200 in a 95% triethylamine solution with a mass ratio of activated carbon to triethylamine solution of 1:9. After mixing the mixed powder, activated carbon, and the solution prepared with triethylamine in a mass ratio of 1:10, add purified water and extremely fine silica powder with a particle size of 50 nm - 150 nm to adjust to a paste state, place it in a vacuum drying oven, and dry it at 0.9 Mpa and 150 °C to obtain a mixed dried product;

[0054] Calcinate the mixed dried product at 400 °C for 4 h to obtain a CeO₂ / TiO₂ catalyst. After tabletting, crushing, and sieving, take catalyst particles with a mesh size of 40 - 50, mix them evenly with PTFE powder in a mass ratio of 1:8 to obtain PTFE mixed dust, and place it in the powder supply device 3.

[0055] Continuously feed the fully dispersed PTFE mixed dust in the powder supply device 3 into the loop-shaped powder supply chamber 5. Connect the spinneret 2 and the loop-shaped powder supply chamber 5 to the positive and negative electrodes of the high-voltage DC power supply 4 respectively. Under the action of static electricity, the negatively charged mixed dust adheres to the glass fiber pulled out from the spinneret 2 of the glass furnace 1 to form a glass fiber bundle;

[0056] (2) After the glass fiber bundle passing through the loop-shaped powder supply chamber 5 is cooled, it is infiltrated on the coating wheel of the sizing agent coating device 6. The PTFE in the mixed dust solidifies on the glass fiber to form a cladding, and the catalyst particles in the mixed dust adhere to the glass fiber to form a high-temperature resistant skin-core fiber with the function of removing dioxins, which is the pollutant-removing fiber.

[0057] Example 4

[0058] In this example, the glass furnace 1 is a tank furnace.

[0059] A self-heating melting manufacturing method for high-strength, temperature-resistant, and corrosion-resistant pollutant-removing fibers is realized by using the device described in Example 1, and specifically includes the following steps:

[0060] (1) Using the equal-volume impregnation method, under the condition of water bath heating at 65 °C, take ammonium metavanadate and cerium nitrate hexahydrate with a mass ratio of 1:1, add deionized water and stir. After the two solutions are fully mixed, dilute to 0.5 mol / L. Place the TiO₂ carrier into the solution and fully impregnate it. After vacuum drying at 120 °C for 6 h and high-temperature calcination at 1000 °C for 240 min, prepare a V₂O₅-CeO₂ / TiO₂ catalyst;

[0061] The obtained catalyst is tableted, crushed, and sieved. Take particles with a mesh size of 50 - 200 and mix them evenly with PTFE powder at a mass concentration ratio of 10% to obtain PTFE mixed dust, and place it in the powder supply device 3.

[0062] Continuously feed the fully dispersed PTFE mixed dust in the powder supply device 3 into the loop-shaped powder supply chamber 5. Connect the spinneret 2 and the loop-shaped powder supply chamber 5 to the positive and negative electrodes of the high-voltage DC power supply 4 respectively. Under the action of static electricity, the negatively charged mixed dust adheres to the glass fiber pulled out from the spinneret 2 of the glass melting furnace 1 to form a glass fiber bundle;

[0063] (2) After cooling, the glass fiber bundle passing through the loop-shaped powder supply chamber 5 is infiltrated on the coating wheel of the sizing agent coating device 6. The PTFE in the mixed dust solidifies on the glass fiber to form a cladding, and the catalyst particles in the mixed dust adhere to the glass fiber to form a high-temperature resistant skin-core fiber with denitrification function and dioxin removal function, which is the pollutant removal fiber.

Claims

1. A high-strength, temperature-resistant and corrosion-resistant pollutant removal fiber self-heating and melting processing device, characterized in that, Specifically including glass kiln, spinneret, powder supply equipment, high voltage DC power supply, return powder supply chamber, impregnation agent coating equipment and drawing guide wheel; The glass kiln is provided with a spinneret at the discharge port, and a return-shaped powder supply chamber is provided below the spinneret. The glass kiln, the return-shaped powder supply chamber, the wetting agent coating device and the wire drawing guide wheel are sequentially distributed in the height direction, and the wire drawing guide wheel is provided obliquely below the wetting agent coating device; one side of the return-shaped powder supply chamber is connected to the powder supply device, and a high-voltage DC power supply is provided on the other side of the return-shaped powder supply chamber; The spinneret is electrically connected to the positive electrode of a high-voltage DC power supply, the return-shaped powder supply cavity is electrically connected to the negative electrode of the high-voltage DC power supply, and the high-voltage DC power supply is grounded.

2. The high-strength, temperature-resistant and corrosion-resistant pollutant removal fiber self-heating and melting processing device according to claim 1, characterized in that, The glass furnace is a tank furnace or a crucible furnace.

3. A high-strength, temperature-resistant, and corrosion-resistant pollutant removal fiber self-heating and melting processing device according to claim 1, characterized in that, The return-shaped powder supply cavity is a hollow structure, and a powder outlet slit is provided inside the cavity for spraying mixed dust.

4. A self-heating melting manufacturing method for high-strength, temperature-resistant and corrosion-resistant pollutant-removing fibers, realized by using the device described in claim 1, characterized in that, The specific steps include: (1) The PTFE mixed dust fully dispersed in the powder feeding equipment is continuously fed into the return type powder feeding chamber, and the spinneret and the return type powder feeding chamber are connected to the positive and negative electrodes of a high voltage DC power supply respectively. Under the action of static electricity, the negatively charged mixed dust adheres to the glass fiber drawn from the spinneret of the glass kiln to form a glass fiber bundle; The PTFE mixed dust is prepared by adding catalyst particles into PTFE powder, and the catalyst particles are selected from one or two of V2O5 / TiO2 and CeO2 / TiO2; (2) After cooling, the glass fiber bundle passing through the return powder supply cavity is impregnated on the coating wheel of the impregnant coating equipment. The PTFE in the mixed dust solidifies on the glass fiber to form a cladding, and the catalyst particles in the mixed dust adhere to the glass fiber to form a high-temperature resistant sheath-core fiber with denitrification and / or dioxin removal function, which is the pollutant removal fiber.

5. The self-heating melting manufacturing method of a high-strength, temperature-resistant, and corrosion-resistant pollutant-removing fiber according to claim 4, characterized in that, In the step (1), when the PTFE mixed dust is V2O5 / TiO2 catalyst particles mixed with PTFE powder, the obtained pollutant removal fiber has a denitrification function; when the PTFE mixed dust is CeO2 / TiO2 catalyst particles mixed with PTFE powder, the obtained pollutant removal fiber has a dioxin removal function; when the PTFE mixed dust is V2O5 / TiO2 and CeO2 / TiO2 catalyst particles mixed with PTFE powder, the obtained pollutant removal fiber has both denitrification and dioxin removal functions.

6. The self-heating melting manufacturing method of a high-strength, temperature-resistant and corrosion-resistant pollutant-removing fiber according to claim 5, characterized in that, The preparation method of the PTFE mixed dust used in the high-temperature resistant sheath-core fiber with denitrification function is as follows: Add titanium dioxide and vanadium pentoxide into a mixing container at a mass ratio of 10:1 to obtain a mixed powder. Then, add metal oxides with a mass fraction of 5% - 20% of the mixed powder to prepare a mixed catalyst powder. Adjust the temperature to 80°C - 120°C and mix thoroughly until the materials are homogenized. The mixed materials are vacuum dried at 120°C - 150°C for 6h - 12h, and then calcined at a high temperature of 1200°C - 1400°C for 240min - 300min to obtain V2O5-MnO2 / TiO2 catalyst particles. After tabletting, crushing, and sieving, take particles with a mesh size of 40 - 50, and mix them evenly with PTFE powder at a mass ratio of 1:(6 - 10) to obtain PTFE mixed dust.

7. The self-heating melting manufacturing method of a high-strength, temperature-resistant, corrosion-resistant pollutant-removing fiber according to claim 5, characterized in that The preparation method of the PTFE mixed dust used in the high-temperature resistant skin-core fiber with dioxin removal function is as follows: Mix anatase TiO2 and cerium nitrate hexahydrate at a mass ratio of 1:20 to form a mixed powder; impregnate activated carbon in powder form with a mesh size above 200 in a 95% triethylamine solution at a mass ratio of activated carbon to triethylamine solution of 1:

9. After mixing the mixed powder, the activated carbon, and the solution prepared with triethylamine at a mass ratio of 1:10, add purified water and very fine silica powder with a particle size of 50nm - 150nm to adjust to a paste state, and place it in a vacuum drying oven to dry at 0.9Mpa and 150°C to obtain a mixed dried product; Calcine the mixed dried product at 400°C for 4h to obtain a CeO2 / TiO2 catalyst. After tabletting, crushing, and sieving, take catalyst particles with a mesh size of 40 - 50, and mix them evenly with PTFE powder at a mass ratio of 1:8 to obtain PTFE mixed dust.

8. The self-heating melting manufacturing method of a high-strength, temperature-resistant and corrosion-resistant pollutant-removing fiber according to claim 5, characterized in that, The preparation method of the PTFE mixed dust used in the high-temperature resistant skin-core fiber with denitrification and dioxin removal functions is as follows: Adopt the method of equal-volume impregnation. Under the condition of water bath heating at 65°C, take ammonium metavanadate and cerium nitrate hexahydrate with a mass ratio of 1:1, add deionized water and stir; after the two solutions are fully mixed, dilute to 0.5mol / L - 1mol / L, place the TiO2 carrier into the solution and fully impregnate it, and prepare a V2O5-CeO2 / TiO2 catalyst after vacuum drying at 120°C - 180°C for 6h - 12h and high-temperature calcination at 1000°C - 1200°C for 240min; The obtained catalyst is tableted, crushed, and sieved. Take particles with a mesh size of 50 - 200 and mix them evenly with PTFE powder at a ratio of 10% - 12% by mass fraction to obtain PTFE mixed dust.

9. A high-strength, temperature- and corrosion-resistant pollutant-removing fiber, characterized in that, Prepared by using the method described in any one of claims 4 - 8.

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