CN106811982B - Manufacturing process of medium-low temperature filter material - Google Patents
Manufacturing process of medium-low temperature filter material Download PDFInfo
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- CN106811982B CN106811982B CN201611224888.2A CN201611224888A CN106811982B CN 106811982 B CN106811982 B CN 106811982B CN 201611224888 A CN201611224888 A CN 201611224888A CN 106811982 B CN106811982 B CN 106811982B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
-
- 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
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/0047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by incorporating air, i.e. froth
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/042—Acrylic polymers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/30—Filters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to a process for preparing a medium-low temperature filter material, which comprises the following steps: preparing polyester needle-punched non-woven fabric; preparing coating slurry, wherein the coating slurry comprises the following components in percentage by weight: acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 90-95%, crosslinking agent: 0.5-1%, foaming agent: 1-2%, foam stabilizer: 4 to 6 percent; adding a cross-linking agent, a foaming agent and a stabilizing agent into the ternary copolymer emulsion, mixing and stirring, and completing foaming; and coating and baking the sizing agent on the surface of the polyester needle-punched non-woven fabric. The coating of the invention forms a layer of film with micropores on the surface of the filter material, thereby improving the temperature resistance, chemical resistance, oil-repellent, hydrophobic, surface effect and ash removal performance of the filter material, prolonging the ash removal period and service life of the filter material, and the coating does not use adhesive, completely depends on heating treatment, leads the high molecular material to be melted and adhered on the surface of the fiber, and effectively avoids the phenomena of falling off of the film of the filter material of the coating film and ash filling after the local film is damaged.
Description
Technical Field
The invention relates to the field of dust removal equipment, in particular to a manufacturing process of a medium-low temperature filter material.
Background
With the rapid development of national economy, a great amount of smoke dust is released in industrial processes including electric power, metallurgy, cement, petrochemical, solid waste disposal and the like, and air pollution (especially PM2.5 pollution) becomes an increasingly serious global problem. The electrostatic precipitator is the main dust removing equipment of coal-fired power plants and cement plants in China, but the outlet dust concentration of the electrostatic precipitator is higher, the requirement on working conditions is high, and the removal rate of fine particles is lower. The bag type dust collector has the characteristics of simple structure, less investment, simple and reliable operation, wide range of dust collecting particle size, high filtering efficiency, no influence of working conditions and the like, and gradually replaces other low-efficiency dust collection modes.
A considerable part of the bag-type dust collector adopts a needle felt material, belongs to deep filtration, and is separated by depending on a dust particle layer intercepted on a filter material, so that the problems of short service life, poor filtration precision, difficult dust removal and the like generally exist. In order to overcome the defects, a membrane filter material is adopted in the latest mode, belongs to surface filtration, has high filtration precision, and has the principle that dust is intercepted by a film adhered to the surface, and the defects of high processing and manufacturing cost, high transportation and installation requirements, large resistance, high energy consumption, easy failure of a surface layer film and the like in the using process. The traditional film covering technology is divided into two types, wherein firstly, the PTFE film is attached, but the air permeability is about 50mm/s generally, the fastness of the film is relatively poor, secondly, the foaming coating of the PTFE dispersion liquid is realized, the high-temperature sintering temperature is 300-350 ℃, the energy consumption is large, the generated micropores are not uniform, certain pollution is caused to air, and the cost is higher.
In the development aspect of novel filter materials, some high-efficiency filter materials such as gradient filter materials, composite filter materials and the like are developed at home and abroad, and the functions of oil resistance, water resistance and the like can be realized after surface treatment; or through surface coating treatment, finer particles can be filtered, but the filter material of the surface coating is expensive, and if the filter material is not well compounded with the film, adverse effects such as filter material failure and the like can be brought. Although some domestic enterprises research and develop surface treatment technology, filter material film covering technology, spunlace filtration technology and the like of filter materials, and make certain progress on economy and applicability, further research is needed on efficiently controlling PM2.5 fine particles.
Disclosure of Invention
The invention aims to provide a manufacturing process of a medium-low temperature filter material, wherein the filtering temperature of the medium-low temperature filter material is normal temperature to 120 ℃.
In order to achieve the purpose, the invention adopts the technical scheme that:
a manufacturing process of a medium-low temperature filter material comprises the following steps:
(1) preparing a polyester needle-punched non-woven fabric;
(2) preparing coating slurry, wherein the coating slurry comprises the following components in percentage by weight:
acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 90-95 percent of the total weight of the mixture,
a crosslinking agent: 0.5 to 1 percent of the total weight of the mixture,
foaming agent: 1 to 2 percent of the total weight of the mixture,
foam stabilizer: 4 to 6 percent;
(3) adding a cross-linking agent, a foaming agent and a stabilizing agent into the ternary polymerization emulsion, mixing and stirring, and completing foaming; and coating and baking the sizing agent on the surface of the polyester needle-punched non-woven fabric.
Preferably, in (3): and (2) sequentially adding the cross-linking agent, the foaming agent and the stabilizing agent into the ternary copolymer emulsion for stirring, wherein the stirring speed is gradually increased and is 100-1000 r/min, and the stirring time is 10-20 min.
Preferably, in (3): and conveying the slurry to foaming equipment for foaming in a vacuum negative pressure mode, wherein the foaming ratio is 1.5-3.
Further preferably, the foaming ratio is 2 to 2.5.
Preferably, in (3): the coating speed is 15-20 m/min.
Preferably, in (3): the baking temperature is 135-160 ℃, and the baking time is 1-1.5 min.
Preferably, after (3): and carrying out foam pressing treatment on the baked filter material at the pressure of 4-8kg and at the speed of 10-15 m/min.
Preferably, the gram weight of the terylene acupuncture filter material is 500-600g/m2。
Because the copolymerization emulsion contains organic silicon components, the microporous membrane formed on the surface of the filter material by the coating has extremely smooth surface and excellent ash removal effect in the using process;
the copolymerization emulsion is coated on the filter material by foaming, part of emulsion colloid is embedded into fiber after baking and foam pressing, the glass separation strength of the membrane is enhanced, and meanwhile, the self strength of the membrane formed in the high-temperature baking process is greatly increased due to the action of an additional cross-linking agent;
unlike dispersion, terpolymer has even distribution of micropores and smaller pores, and the stability of foam is better in the production process, so that the stability of the filter material product is improved.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:
the coating agent does not use an adhesive, completely depends on heating treatment, enables a high polymer material to be melted and adhered to the surface of the fiber, and effectively avoids the phenomena of falling off of a membrane-coated filter material film and ash filling after a local membrane is damaged.
Detailed Description
The invention is further described below with reference to the examples:
the first embodiment is as follows:
a manufacturing process of a medium-low temperature filter material comprises the following steps:
(1) the prepared g weight was 550g/m2The polyester needle punched non-woven fabric;
(2) preparing coating slurry, wherein the coating slurry comprises the following components:
acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 91%, crosslinking agent: 1%, foaming agent: 2%, foam stabilizer: 6 percent;
(3) sequentially adding a cross-linking agent, a foaming agent and a stabilizing agent into the ternary polymerization emulsion for stirring, wherein the stirring speed is gradually increased and can be 1000 revolutions per minute from 100 and the stirring time is 15 minutes, and uniformly stirring for later use; conveying the slurry to mechanical foaming equipment for foaming in a vacuum negative pressure mode, wherein the foaming ratio is 2.5;
delivering the slurry with stable foaming to a one-stage sizing coating device, coating the filter material, and keeping the speed at 15-20 m/min;
delivering the coated filter material into a baking box for baking, wherein the baking temperature is 135-160 ℃, and baking is carried out in five sections;
(4) carrying out foam pressing treatment on the baked coating filter material;
(5) and finally, coiling the filter material subjected to pressing and soaking.
Example two:
the coating slurry comprises the following components: acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 93%, crosslinking agent: 1%, foaming agent: 2%, foam stabilizer: 4 percent.
Example three:
the coating slurry comprises the following components: acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 94%, cross-linking agent: 0.5%, foaming agent: 1% and foam stabilizer: 4.5 percent.
And (3) small experiment test:
(a) the coating filter material has great improvement and improvement on indexes such as strength, air permeability, filtering performance, emission and the like, and experimental data show that the emission and the strength are equivalent to those of the membrane-coated filter material, the initial air permeability is superior to that of a membrane, the residual resistance is higher than that of the membrane, and dust emission is not detected in the experiment.
(b) The latitudinal strength of the coated filter material is equal to that before the coating, and the longitudinal strength is improved from 1336N to 2059N, which is equivalent to that of the membrane-coated filter material.
(c) The air permeability of the coating filter material is equivalent to that of the non-coated needled felt and is more than 200 mm/s.
(d) The filtering performance of the coating filter material is good, but the residual resistance value is still higher than that of the membrane-coated filter material, the average of the membrane-coated filter material is 330Pa, and the average of the coating filter material is 400 Pa.
(e) The air permeability of the coating filter material is more than or equal to 200mm/s, and the PTFE membrane filter material is about 50 mm/s.
Pilot test experimental testing:
the experiment is mainly based on 6 meters of dust removal units of an ultra-long bag experiment table (without a bypass valve), and the length specification of 6000mm is selected as the filtering device.
List of experimental parameters:
the dust emission concentration can be stably maintained at 5mg/m under the high-filtering-speed condition of 1.1m/min by means of on-line monitoring and manual comparison3About, the maximum value appearing in the ash removal process under individual working conditions is only 6.7mg/m3The ash removal performance index is excellent, and the environment-friendly requirement of ultralow emission can be completely met.
Compared with the traditional PTFE dispersion solution laminating process, the process is simple and environment-friendly in the process of producing the laminating filter material, and the energy consumption is greatly reduced; the traditional PTFE coating adopts a baking mode at 300-400 ℃, PTFE which is foamed and coated on a filter material is dispersed, melted and coated on the filter material, and the color fastness is relatively poor, and the coating filter material of the application adopts the organic silicon terpolymer, so that the film forming temperature is low, the process for preparing the foaming stabilizer is stable, the energy is saved, and the consumption is reduced; the filter material has good film forming fastness (part of terpolymer resin is embedded into the fiber, and the fastness of the film is improved to a great extent due to the addition of a cross-linking agent).
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. A manufacturing process of a medium-low temperature filter material comprises the following steps:
(1) the prepared gram weight is 550g/m2The polyester needle punched non-woven fabric;
(2) preparing coating slurry, wherein the coating slurry comprises the following components:
acrylate, organic silicon and temperature-resistant resin ternary copolymer emulsion: 91%, crosslinking agent: 1%, foaming agent: 2%, stabilizer: 6 percent;
(3) sequentially adding a cross-linking agent, a foaming agent and a stabilizing agent into the ternary polymerization emulsion for stirring, wherein the stirring speed is gradually increased from 100-; conveying the slurry to mechanical foaming equipment for foaming in a vacuum negative pressure mode, wherein the foaming ratio is 2.5;
delivering the slurry with stable foaming to a one-stage sizing coating device, coating the filter material, and keeping the speed at 15-20 m/min;
delivering the coated filter material into a baking box for baking, wherein the baking temperature is 135-160 ℃, and baking is carried out in five sections;
(4) carrying out foam pressing treatment on the baked coating filter material;
(5) and finally, coiling the filter material subjected to pressing and soaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611224888.2A CN106811982B (en) | 2016-12-27 | 2016-12-27 | Manufacturing process of medium-low temperature filter material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611224888.2A CN106811982B (en) | 2016-12-27 | 2016-12-27 | Manufacturing process of medium-low temperature filter material |
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| Publication Number | Publication Date |
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| CN106811982A CN106811982A (en) | 2017-06-09 |
| CN106811982B true CN106811982B (en) | 2020-05-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179106A (en) * | 2011-01-27 | 2011-09-14 | 南京际华三五二一特种装备有限公司 | Finishing agent for aftertreatment of glass fiber filter material |
| CN102888753A (en) * | 2012-10-22 | 2013-01-23 | 浙江理工大学 | Method for surface refinement of nonwoven filter material |
| CN103820999A (en) * | 2014-02-27 | 2014-05-28 | 江苏东方滤袋有限公司 | Finishing method for bag type dedusting material and prepared dedusting material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07114906B2 (en) * | 1987-09-22 | 1995-12-13 | 東レ株式会社 | Filter cloth running type filter cloth for solid-liquid separation |
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- 2016-12-27 CN CN201611224888.2A patent/CN106811982B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179106A (en) * | 2011-01-27 | 2011-09-14 | 南京际华三五二一特种装备有限公司 | Finishing agent for aftertreatment of glass fiber filter material |
| CN102888753A (en) * | 2012-10-22 | 2013-01-23 | 浙江理工大学 | Method for surface refinement of nonwoven filter material |
| CN103820999A (en) * | 2014-02-27 | 2014-05-28 | 江苏东方滤袋有限公司 | Finishing method for bag type dedusting material and prepared dedusting material |
Non-Patent Citations (1)
| Title |
|---|
| 针刺过滤材料的表面精细化处理;黄学亮 等;《浙江理工大学学报》;20120930;第29卷(第5期);第646-649、667页 * |
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