WO2021107701A1 - Filtre de sac résistant à la chaleur comprenant des particules électrostatiques de ptfe, et procédé de fabrication de filtre de sac résistant à la chaleur - Google Patents

Filtre de sac résistant à la chaleur comprenant des particules électrostatiques de ptfe, et procédé de fabrication de filtre de sac résistant à la chaleur Download PDF

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Publication number
WO2021107701A1
WO2021107701A1 PCT/KR2020/017137 KR2020017137W WO2021107701A1 WO 2021107701 A1 WO2021107701 A1 WO 2021107701A1 KR 2020017137 W KR2020017137 W KR 2020017137W WO 2021107701 A1 WO2021107701 A1 WO 2021107701A1
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Prior art keywords
ptfe
bag filter
heat
coating layer
pva
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PCT/KR2020/017137
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English (en)
Korean (ko)
Inventor
김연상
엄현진
허기준
권기범
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한국생산기술연구원
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Publication of WO2021107701A1 publication Critical patent/WO2021107701A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0241—Types of fibres, filaments or particles, self-supporting or supported materials comprising electrically conductive fibres or particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0478—Surface coating material on a layer of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material

Definitions

  • the present invention relates to a heat-resistant bag filter, and more particularly, to a heat-resistant bag filter containing PTFE electrostatic particles and excellent thermal stability as well as high-performance fine dust collection performance, and a method for manufacturing the heat-resistant bag filter.
  • Fine dust emitted from industrial sites such as steel industry, cement manufacturing, petroleum manufacturing, and incinerators designated as workplaces that emit large amounts of fine dust is emitted together with exhaust gas at a high temperature of 260 °C to 280 °C.
  • exhaust gas at a high temperature of 260 °C to 280 °C.
  • Korean Patent Registration No. 10-0690573, etc. discloses a method of manufacturing a ceramic filter having thermal stability.
  • the method of manufacturing the ceramic filter has a disadvantage in that it requires a high temperature of 900° C. or more in the sintering process, and thus energy consumption is high.
  • Korean Patent Registration No. 10-0673141 has developed a high-temperature filter using foam coating to secure thermal stability and excellent air permeability performance, but the dust collection performance for small-sized fine dust is insufficient to satisfy the increasingly strict emission standards.
  • due to the large and non-uniform pore size of the surface filter body manufactured through foam coating there is a disadvantage in that it is inefficient in preventing the penetration of dust particles into the filter body.
  • one technical object of the present invention is to provide a heat-resistant bag filter having excellent filter performance against fine dust while maintaining thermal stability in a high-temperature environment.
  • Another technical object of the present invention is to provide a method of manufacturing a heat-resistant bag filter having excellent filter performance against fine dust while maintaining thermal stability in a high-temperature environment.
  • one aspect of the present invention is a fabric support layer; a PTFE foam coating layer laminated on the fabric support layer; And it provides a heat-resistant bag filter comprising PTFE electrostatic particles dispersed and fixed on the PTFE foam coating layer.
  • the thickness of the PTFE foam coating layer may be 5 ⁇ m to 200 ⁇ m.
  • the size of the PTFE electrostatic particles may be 100 nm to 200 nm.
  • the average pore size of the heat-resistant bag filter may be 5.0 ⁇ m to 20.0 ⁇ m.
  • One aspect of the present invention is a fabric support layer; PTFE foam coating layer located on the fabric support layer; and a PVA/PTFE composite coating layer positioned on the PTFE foam coating layer, wherein the PVA/PTFE composite coating layer is in a form in which PTFE electrostatic particles are dispersed and fixed on the PVA nanofiber layer.
  • a heat-resistant bag filter Provides a heat-resistant bag filter. .
  • the thickness of the PTFE foam coating layer may be 5 ⁇ m to 200 ⁇ m.
  • the thickness of the PVA / PTFE composite coating layer may be 0.1 ⁇ m to 10.0 ⁇ m.
  • the PVA nanofiber layer may have a porous web structure.
  • the diameter of the PVA nanofiber may be about 200 nm to 300 nm.
  • the size of the PTFE electrostatic particles may be 100 nm to 200 nm.
  • the average pore size of the heat-resistant bag filter may be 1.0 ⁇ m to 20.0 ⁇ m.
  • One aspect of the present invention comprises the steps of preparing a bag filter base; preparing a PTFE solution and electrostatically spraying the PTFE solution to fix the PTFE electrostatic particles on the base of the bag filter; and heat-treating the base of the bag filter to which the PTFE electrostatic particles are fixed. It provides a method of manufacturing a heat-resistant bag filter, characterized in that the fixing of the PTFE electrostatic particles is performed by electrostatically spraying the PTFE solution and simultaneously spraying air into the sprayed PTFE solution.
  • the base of the bag filter includes a fabric support layer; and a PTFE foam coating layer positioned on the fabric support layer.
  • the fixing of the PTFE electrostatic particles may be performed by spraying air at a pressure of 7 psi to 15 psi.
  • the size of the fixed PTFE electrostatic particles may be 100 nm to 200 nm.
  • the heat treatment may be performed at 280 °C to 340 °C.
  • the average pore size of the heat-resistant bag filter may be 5.0 ⁇ m to 20.0 ⁇ m.
  • One aspect of the present invention comprises the steps of preparing a bag filter base; forming a PVA nanofiber layer by electrospinning a PVA polymer solution on the base of the bag filter; Preparing a PTFE solution in which PTFE particles are dispersed, and electrostatically spraying the PTFE solution to fix the PTFE electrostatic particles on the PVA nanofiber layer to form a PVA/PTFE composite coating layer; and heat-treating the base of the bag filter on which the PVA/PTFE composite coating layer is formed. and forming the PVA/PTFE composite coating layer provides a method of manufacturing a heat-resistant bag filter, characterized in that the PTFE solution is electrostatically sprayed and air is sprayed into the sprayed PTFE solution.
  • the base of the bag filter includes a fabric support layer; and a PTFE foam coating layer positioned on the fabric support layer.
  • the formed PVA nanofiber layer in the step of forming the PVA nanofiber layer, may have a porous web structure.
  • the diameter of the formed PVA nanofiber in the step of forming the PVA nanofiber layer, may be about 200 nm to 300 nm.
  • the forming of the PVA/PTFE composite coating layer may be performed by spraying air at a pressure of 7 psi to 15 psi.
  • the size of the fixed PTFE electrostatic particles may be 100 nm to 200 nm.
  • the heat treatment may be performed at 280 °C to 340 °C.
  • the average pore size of the heat-resistant bag filter may be 1.0 ⁇ m to 20.0 ⁇ m.
  • nano-sized PTFE electrostatic particles are formed on the surface to form a heat-resistant pore structure on the surface of the bag filter, so that the fine dust collection performance of the bag filter can be improved.
  • the PTFE electrostatic particles are effective in preventing the infiltration of fine dust into the bag filter.
  • due to the characteristics of the PTFE it is excellent in heat resistance, acid resistance, alkali resistance, abrasion resistance, and the like.
  • the heat-resistant bag filter of the present invention has the advantage that it can be applied to various industrial field conditions since the dust collection performance is constantly maintained even when the flow rate is increased or decreased.
  • FIG 1 and 2 are schematic views of a front view (a) and a plan view (b) of a heat-resistant bag filter according to an embodiment of the present invention.
  • FIG. 3 and 4 are flowcharts of a method of manufacturing a heat-resistant bag filter according to an embodiment of the present invention.
  • FIG. 5 is an SEM image of a heat-resistant bag filter according to an embodiment of the present invention.
  • FIG. 1 is a front view (a) viewed from the side and a plan view (b) viewed from the top of the heat-resistant bag filter of the present invention.
  • the heat-resistant bag filter of the present invention includes a fabric support layer 100; PTFE foam coating layer 200 laminated on the fabric support layer 100; and PTFE electrostatic particles 310 dispersed and fixed on the PTFE foam coating layer 200 .
  • the heat-resistant bag filter of the present invention includes a PTFE foam coating layer 200 laminated on the fabric support layer 100 .
  • the fabric support layer 100 corresponds to a portion on which the coating layer of the heat-resistant bag filter of the present invention is formed, and the material of the fabric support layer 100 may be composed of cloth, synthetic fiber, non-woven fabric, inorganic fiber support, etc. and may have a thickness of about 400 ⁇ m to 1,000 ⁇ m, but is not limited thereto.
  • polytetrafluoroethylene refers to a fluorine-based resin including a fluorine compound represented by the following Chemical Formula 1 in which all hydrogens of polyethylene are replaced with fluorine:
  • n 100 to 10,000.
  • the PTFE is known under the trade name of Teflon, is chemically resistant to almost all chemicals, and has a smooth surface.
  • the PTFE foam coating layer 200 is formed by performing a foam coating process using the PTFE, and the foam coating process is, for example, by treating a coating solution containing PTFE, a foam stabilizer, a foaming agent and a thickener with a foam generator to form a foam. After making, it can be carried out by applying it on the fabric support layer 100, but if it is a method known in the art, it is not limited thereto.
  • the PTFE foam coating layer 200 has an average pores of about 20.0 ⁇ m to 40.0 ⁇ m, and the thickness may be 5 ⁇ m to 200 ⁇ m.
  • the heat-resistant bag filter of the present invention includes PTFE electrostatic particles 320 dispersed and fixed on the PTFE foam coating layer 200 .
  • the PTFE electrostatic particles 320 may be dispersed and positioned in the form of particles on the PTFE foam coating layer 200, and the PTFE foam by performing the electrostatic spraying method described in the following aspects. It may be coated and fixed on the coating layer 200 .
  • the size of the PTFE electrostatic particles 320 may be 100 nm to 200 nm, and the nano-sized PTFE electrostatic particles 320 are fixed to the surface of the PTFE foam coating layer 200 . , It may have a size smaller than the average pores of the PTFE foam coating layer 200, for example, the average pores of 5.0 ⁇ m to 20.0 ⁇ m.
  • the heat-resistant bag filter of the present invention has an average pore of 5.0 ⁇ m to 20.0 ⁇ m, so that the dust collection performance for ultra-fine particulate matter (PM2.5) with a diameter of 2.5 ⁇ m or less can be improved.
  • PM2.5 ultra-fine particulate matter
  • FIG. 2 is a front view viewed from the side (a) and a plan view viewed from the top (b) of the heat-resistant bag filter of the present invention.
  • the heat-resistant bag filter of the present invention includes a fabric support layer 100; PTFE foam coating layer 200 positioned on the fabric support layer 100; and a PVA/PTFE composite coating layer 300 positioned on the PTFE foam coating layer 200, wherein the PVA/PTFE composite coating layer 300 is a PVA nanofiber layer 310 on which PTFE electrostatic particles 320 are dispersed. and may be in a fixed form.
  • the heat-resistant bag filter of the present invention includes a PTFE foam coating layer 200 laminated on the fabric support layer 100 .
  • the heat-resistant bag filter of the present invention includes a PVA/PTFE composite coating layer 300 positioned on the PTFE foam coating layer 200, and the PVA/PTFE composite coating layer 300 is a PVA nanofiber layer 310 on The PTFE electrostatic particles 320 may be dispersed and fixed thereto.
  • the PVA nanofiber layer 310 may be formed in a porous web structure on the PTFE foam coating layer 200, and the PTFE foam coating layer by performing the electrospinning method described in the following aspects. It may be coated on (200).
  • the diameter of the PVA nanofibers may be about 200 nm to 300 nm, and is formed in a porous web structure, and the PTFE foam coating layer 200 on which the PVA nanofiber layer is formed is the PTFE foam coating layer ( 200) may have an average pore size smaller than the average pore size, for example, 1.0 ⁇ m to 20.0 ⁇ m.
  • the PTFE electrostatic particles 320 may be dispersed and positioned in the form of particles on the PVA nanofiber layer 310, and the PVA nanofiber layer 310 by performing the electrostatic spraying method described in the following aspects. It may be coated and fixed on the fiber layer 310 .
  • the size of the PTFE electrostatic particles 320 may be 100 nm to 200 nm, and the nano-sized PTFE electrostatic particles 320 are fixed to the surface of the PVA nanofiber layer 310 by , may have an average pore of 1.0 ⁇ m to 20.0 ⁇ m.
  • the heat-resistant bag filter of the present invention has an average pore of 1.0 ⁇ m to 20.0 ⁇ m, so that the dust collection performance of ultra-fine particulate matter (PM2.5) with a diameter of 2.5 ⁇ m or less can be improved.
  • PM2.5 ultra-fine particulate matter
  • FIG. 3 is a flowchart of a method of manufacturing a heat-resistant bag filter according to an embodiment of the present invention.
  • the method for manufacturing a heat-resistant bag filter includes the steps of preparing a bag filter base (S110); preparing a PTFE solution in which PTFE particles are dispersed, and electrostatically spraying the PTFE solution to fix the PTFE electrostatic particles on the base of the bag filter (S120); and heat-treating the base of the bag filter to which the PTFE electrostatic particles are fixed (S130); Including, the step of fixing the PTFE electrostatic particles (S120) may be characterized in that the PTFE solution is electrostatically sprayed and air is sprayed into the sprayed PTFE solution at the same time.
  • the method of manufacturing the heat-resistant bag filter of the present invention includes the step of preparing the bag filter base (S110).
  • the bag filter base may include a fabric support layer and a PTFE foam coating layer positioned on the fabric support layer, and the step of preparing the bag filter base (S110) is applied to the fabric support layer.
  • the method for forming the PTFE foam coating layer may be performed, or it may be performed by purchasing a bag filter base including a commercially available PTFE foam coating layer.
  • the fabric support layer and the PTFE foam coating layer are substituted for those described in the above embodiment.
  • the method for manufacturing a heat-resistant bag filter of the present invention includes preparing a PTFE solution in which PTFE particles are dispersed, and electrostatically spraying the PTFE solution to fix the PTFE electrostatic particles on the base of the bag filter (S120). .
  • the electrostatic spraying process is a technology capable of atomizing a liquid using electrostatic force, and is a technology capable of continuously producing droplets of several tens of micrometers or less.
  • the step of fixing the PTFE electrostatic particles (S120) may be performed using an air-assisted electrostatic spraying method, wherein the air-assisted electrostatic spraying method sprays air while performing the electrostatic spraying process.
  • the air-assisted electrostatic spraying method sprays air while performing the electrostatic spraying process.
  • it may be carried out by electrostatically spraying the PTFE solution and spraying air into the sprayed PTFE solution at the same time.
  • the air-assisted electrostatic spraying method may be performed using a PTFE electrostatic spraying particle coating device, wherein the PTFE electrostatic spraying particle coating device includes a power supply, a syringe pump, a vacuum pump, It may be configured to include a dual nozzle and a collector.
  • a voltage is applied between the nozzle and the collector by, for example, a high voltage generator, and fine particles are generated by the electrostatic force formed at this time. may be formed, and at this time, the PTFE solution and air may be simultaneously supplied through the dual nozzle.
  • the PTFE solution may include PTFE particles and water that can act as a working fluid in the electrostatic spraying process.
  • the PTFE solution and air When simultaneously supplied through the dual nozzles, the size of the PTFE electrostatic particles can be further reduced by accelerating the drying of the water acting as the working fluid through the supplied air.
  • the supply of the PTFE solution may be controlled through a syringe pump, and the supply of the air may be controlled through a vacuum pump.
  • the concentration of the PTFE solution may be 6 wt% to 60 wt%
  • the applied voltage may be 15 kV to 25 kV
  • the application distance is 10 cm to 20 cm
  • the pressure of the supplied air may be 7 psi to 15 psi.
  • the size of the PTFE electrostatic particles may be 100 nm to 200 nm, and by fixing the nano-sized PTFE electrostatic particles to the surface of the PTFE foam coating layer, the average pores of the PTFE foam coating layer It may have a small size, for example, an average pore of 5.0 ⁇ m to 20.0 ⁇ m.
  • the heat-resistant bag filter manufactured by the manufacturing method of the present invention has an average pore of 5.0 ⁇ m to 20.0 ⁇ m, so that the dust collection performance for ultra-fine particulate matter (PM2.5) with a diameter of 2.5 ⁇ m or less can be improved.
  • PM2.5 ultra-fine particulate matter
  • the method of manufacturing a heat-resistant bag filter of the present invention may include heat-treating the base of the bag filter to which the PTFE electrostatic particles are fixed ( S130 ).
  • the heat treatment step (S130) is a step of stabilizing the base of the bag filter in which the PTFE electrostatic particles formed in the step (S120) of fixing the PTFE electrostatic particles are dispersed and fixed, 280 ° C. to 340 ° C. It can be carried out at °C.
  • FIG. 4 is a flowchart of a method for manufacturing a heat-resistant bag filter according to an embodiment of the present invention.
  • the method of manufacturing a heat-resistant bag filter includes the steps of preparing a bag filter base (S210); forming a PVA nanofiber layer by electrospinning a PVA polymer solution on the base of the bag filter (S220); Preparing a PTFE solution in which PTFE particles are dispersed, and electrostatically spraying the PTFE solution to fix the PTFE electrostatic particles on the PVA nanofiber layer to form a PVA/PTFE composite coating layer (S230); and heat-treating the base of the bag filter on which the PVA/PTFE composite coating layer is formed (S240); Including, the step (S230) of forming the PVA / PTFE composite coating layer may be characterized in that the PTFE solution is electrostatically sprayed and air is sprayed to the sprayed PTFE solution at the same time.
  • the method for manufacturing a heat-resistant bag filter according to the present invention includes the step of preparing the bag filter base (S210).
  • the bag filter base may include a fabric support layer and a PTFE foam coating layer positioned on the fabric support layer, and the step of preparing the bag filter base (S210) is applied to the fabric support layer.
  • the method for forming the PTFE foam coating layer may be performed, or it may be performed by purchasing a bag filter base including a commercially available PTFE foam coating layer.
  • the fabric support layer and the PTFE foam coating layer are replaced with those described in the above embodiment.
  • the method for manufacturing a heat-resistant bag filter of the present invention includes the step (S220) of forming a PVA nanofiber layer by electrospinning a PVA polymer solution on the base of the bag filter.
  • the electrospinning method is a process capable of manufacturing nanofibers through a jet of an electrically charged polymer solution and melt, and the electrospinning technique is used for all polymer materials that can be melted and mixed in a solvent.
  • nanofibers can be easily manufactured and the shape and size of nanofibers can be easily controlled.
  • Forming the PVA nanofiber layer of the present invention may be performed using the electrospinning method, and the electrospinning method is not limited as long as it is a method known in the art to which the present invention pertains.
  • the electrospinning voltage may be 10 kV to 15 kV
  • the nozzle diameter may be 0.2 mm to 0.3 mm
  • the polymer solution is 100 wt% of the polymer solution. It may be composed of PVA included in an amount of 10 wt% to 15 wt% and Boric Acid included in an amount of 2 wt% to 4 wt%.
  • the diameter of the PVA nanofibers may be about 200 nm to 300 nm, and is formed in a porous web structure, and the PTFE foam coating layer 200 on which the PVA nanofiber layer is formed is the PTFE foam coating layer ( 200) may have an average pore size smaller than the average pore size, for example, 1.0 ⁇ m to 20.0 ⁇ m.
  • a PTFE solution in which PTFE particles are dispersed is prepared, and the PTFE solution is electrostatically sprayed to fix the PTFE electrostatic particles on the PVA nanofiber layer to form a PVA/PTFE composite coating layer. It includes a step (S230) of doing.
  • the step (S230) of forming the PVA/PTFE composite coating layer may be performed using an air-assisted electrostatic spraying method, and the air-assisted electrostatic spraying method is replaced with that described in the above aspect.
  • the size of the PTFE electrostatic particles 320 may be 100 nm to 200 nm, and the nano-sized PTFE electrostatic particles 320 are fixed to the surface of the PVA nanofiber layer 310 by , for example, may have an average pore of 1.0 ⁇ m to 20.0 ⁇ m.
  • the heat-resistant bag filter manufactured by the manufacturing method of the present invention has an average pore of 1.0 ⁇ m to 20.0 ⁇ m, so that the dust collection performance for ultrafine particulate matter (PM2.5) with a diameter of 2.5 ⁇ m or less can be improved.
  • PM2.5 ultrafine particulate matter
  • the method of manufacturing the heat-resistant bag filter of the present invention may include a step (S240) of heat-treating the base of the bag filter on which the PVA/PTFE composite coating layer is formed.
  • the heat treatment step (S240) is a step of stabilizing the base of the bag filter formed with the PVA/PTFE composite coating layer formed in the step (S230) of forming the PVA/PTFE composite coating layer, 280 to 340 It can be carried out at °C.
  • a PVA nanofiber layer is formed by performing an electrospinning method on a PTFE foam-coated filter body (Changmyung Industrial Co., Ltd.) A filter was prepared.
  • the PVA nanofiber layer was formed in a porous web structure on the foam coating layer, and the PTFE electrostatic particles were dispersed and fixed on the PVA nanofiber layer.
  • Example 1 Compared to the control group, the dust collection performance was remarkably improved even with very small particles (0.26 ⁇ m NaCl particles) at a concentration of 12 mg/m 3 to 20 mg/m 3 without a large increase in differential pressure. increase was confirmed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

Dans un filtre de sac résistant à la chaleur, la présente invention comprend : une couche de support de tissu ; une couche de revêtement en mousse de PTFE stratifiée sur la couche de support de tissu ; et des particules électrostatiques de PTFE dispersées sur la couche de revêtement en mousse de PTFE et fixées à celle-ci, des particules électrostatiques de PTFE de taille nanométrique sont formées sur la surface de celle-ci de façon à former une structure de pore résistante à la chaleur sur la surface du filtre de sac, de sorte que la performance de collecte de poussière fine du filtre de sac puisse être améliorée. De plus, les particules électrostatiques de PTFE sont efficaces pour empêcher la pénétration de poussière fine dans le filtre de sac. En outre, les caractéristiques du PTFE confèrent une excellente résistance à la chaleur, résistance à l'acide, résistance aux alcalis, résistance à l'abrasion et analogues et permettent de maintenir constamment les performances de collecte de poussière même si un débit augmente ou diminue, et ainsi l'application à diverses conditions de site industriel est possible.
PCT/KR2020/017137 2019-11-29 2020-11-27 Filtre de sac résistant à la chaleur comprenant des particules électrostatiques de ptfe, et procédé de fabrication de filtre de sac résistant à la chaleur WO2021107701A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190157715A KR102268994B1 (ko) 2019-11-29 2019-11-29 Ptfe 정전입자를 포함하는 내열 백 필터 및 내열 백 필터의 제조방법
KR10-2019-0157715 2019-11-29

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CN115445325A (zh) * 2022-08-31 2022-12-09 安徽世倾环保科技有限公司 具有抗静电涂层的聚四氟乙烯滤料、滤料的制备方法及除尘滤袋

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KR102376501B1 (ko) * 2021-06-22 2022-03-18 유니온필텍 주식회사 미세먼지집진용 복합막 여과체 및 그의 제조방법
KR20230012841A (ko) 2021-07-16 2023-01-26 한국생산기술연구원 마이크로 나노 형상의 ptfe 섬유 여과체 및 그의 제조방법
CN113908633B (zh) * 2021-10-25 2022-12-27 安徽欣创节能环保科技股份有限公司 基于高强度滤袋的低阻高效袋式除尘器
KR102551154B1 (ko) * 2022-06-16 2023-07-04 주식회사 씨에이랩 하이브리드 다층필터 및 그 제작방법

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