KR20020025447A - Porous dust/water collecting filter comprising thermoplastic resin and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A porous dust/water collecting filter that is manufactured by coating Teflon(PTFE) on the surface of a core filter is provided, which has no filter clogging and permeation of particulate contaminants through filtering material with improved physical and chemical properties. CONSTITUTION: The manufacturing method includes the steps of (i) pressure-forming a thermoplastic resin, followed by thermal treating at 80 to 90°C for 4-5 hours, cooling at ambient temperatures, and demoulding to form a core filter(2); (ii) spray coating Teflon powder, being mixed with a binder, on the surface of the core filter at a thickness of 5 to 20μm; and (iii) thermal treating the Teflon coated core filter at 40-5 0°C and then cooling so as to form a coating filter(3) on the surface of the core filter. The thermoplastic resin of the present invention is polyethylene having a porosity of 50 to 60%.

Description

POROUS DUST / WATER COLLECTING FILTER COMPRISING THERMOPLASTIC RESIN AND MANUFACTURING METHOD THEREOF}

The present invention relates to a porous dust collecting / collecting device filter using a thermoplastic synthetic resin and a method for manufacturing the same, which is obtained by coating Teflon (PTFE) on the surface of the core filter as a filter material, the dust collecting or filtration process Because it is made on the surface of Teflon coating, there is no permeation of dust or water filter material and no clogging of internal pores, and it improves the poor durability of conventional nonwoven filter and at the same time, it is excellent in wear resistance, chemical resistance and heat resistance. A dust collecting / collecting device filter and a method of manufacturing the same.

With the development of the industry, various types of dust and dust (weakly referred to as dust) are generated in various industrial sites, and the pollution of water is also increasing as much as this. A dust collector or a water collecting device equipped with a dust collecting filter will be representative.

For example, in the incinerator, steel, powder industry, cement processing, coke and casting manufacturing process, glass and refractory manufacturing process, synthetic resin manufacturing and processing, and thermal power plant, various dusts generated in the dust collector are included in the field. The air is forced into the dust collector and clean air is discharged through the exhaust port after suction filtration with a plurality of dust filters installed therein.

Generally, such a dust collecting / collecting device filter is a resin product obtained by blowing an emulsion of a water-soluble resin such as an acrylic resin, an acrylic thickener, a foaming agent, a bubble stabilizer, a surfactant, an inorganic filler, or a crosslinking agent on the surface of a nonwoven fabric with air. It is obtained by coating and drying, and the material of the core filter supporting the inside is mostly nonwoven fabric.

However, these non-woven fabric filters have low wear resistance, durability, and chemical resistance due to the characteristics of the material, and their pore size is limited to a certain standard. Therefore, these filters cannot be used in various ways. In case of dust that is difficult to form a layer, that is, dust having a size of 20 µm or less or low adhesiveness, dust is discharged at the beginning of operation and dust is often left on the surface of the filter cloth after exhaustion, which causes a decrease in efficiency. As a result, pores are frequently blocked, and consequently, even when pulsing, dedusting is incomplete and frequent exchange of filter cloth is inevitable.

The present invention has been made in view of this point, and by coating Teflon on the surface of the core filter as a filter material to form a Teflon coating film, while complementing the disadvantages of the conventional non-woven filter, heat resistance and chemical resistance and chemical resistance In addition to the excellent electrostatic properties, static electricity is generated during operation, and Teflon's unique characteristics with good dust collection and filtration effects are obtained even for extremely fine dusts or contaminants. The present invention provides a porous dust collecting / collecting device filter using a superior thermoplastic synthetic resin and a method of manufacturing the same.

In the porous dust collecting / collecting device filter using the thermoplastic synthetic resin of the present invention and a method for manufacturing the same, the Teflon coating film is formed on the surface of the core filter as a filter material.

1 is a partially cutaway perspective view of a porous dust collecting / collecting device filter using a thermoplastic synthetic resin of the present invention

Figure 2 is a schematic diagram showing the state of use of the porous dust collecting / collecting device filter using a thermoplastic synthetic resin of the present invention

Figure 3 is a graph of dust emission weight concentration according to the use time of the porous dust collector / collector filter using the thermoplastic synthetic resin of the present invention

※ Explanation of code for main part in drawing

1: Dust collecting / collecting device filter 2: Core filter 3: Coating filter

4 housing 5 clean air chamber 6 dust-containing air chamber

7: dust containing air inlet 8: dust outlet 9: clean air outlet

Hereinafter, the configuration of the present invention through the drawings in detail.

1 is a partially cutaway perspective view of a porous dust collecting / collecting device filter using the thermoplastic synthetic resin of the present invention.

As shown in the figure, the dust collecting / collecting device filter 1 of the present invention is composed of a core filter 2 supporting the inside and a coating filter 3 coated with Teflon.

The internal core filter 2 as the filter medium has fine pores and polyethylene is usually preferred as the thermoplastic synthetic resin having a porosity of 50 to 60%.

In addition, the coating thickness of the Teflon to be the coating filter 3 is related to the size (pore size) of the pores, so that various modifications are possible depending on the application, but the range of 5 to 20 μm is most preferred.

As described above, the dust / collecting filter 1 of the present invention, in which Teflon is coated with a predetermined thickness on the core filter 2 inside, imparts a porosity of 2 μm or less and a porosity of 85% or less. Explain how.

<Production method>

First, the mold housing itself is press-molded to form a basic polyethylene tube, and then heat-treated at 80 to 90 ° C. for 4 to 5 hours in a kiln, cooled at room temperature for 2 to 3 hours, and then demolded to have fine pores and a porosity of 50 to 60. The core filter 2 which is% is molded.

Subsequently, the Teflon powder is mixed with a binder and spray coated on the surface of the core filter 2, then heat treated at 40 to 50 ° C., fused, and cooled, so that the Teflon coated filter 3 is surrounded on the surface of the core filter 2. Jean A porous dust collecting / collecting device filter using the thermoplastic synthetic resin of the present invention is obtained.

On the other hand, Figure 2 discloses a schematic diagram showing the use state when the porous dust collector / collector filter using the thermoplastic synthetic resin of the present invention in the dust collection process, the dust collector / collector filter 1 is built into the housing (4) It is equipped with a clean air chamber (5) and a dust-containing air chamber (6), which is composed of a dust-containing air inlet (7), a dust outlet (8) and a clean air outlet (9) as a path for the air and dust to enter and exit. have.

Looking at the dust collection process of such a configuration, the dust-containing air containing the dust or dust is forced into the dust collector through the dust-containing air inlet (7) from the outside so that the dust-containing air sequentially dust-containing air chamber (6 ), Through the dust collecting / collecting device filter (1) and the clean air chamber (5), may be discharged back to the atmosphere through the clean air outlet (9), and dust-containing air is collected in the dust collecting / collecting device filter (1). During the passage, dust and contaminants are filtered by the filter, collected near the lower dust outlet 8 while descending by gravity, and discharged through the dust outlet 8.

Therefore, dust or pollutants in the dust-containing air can be separated from the air and collected separately, and through the process of inflow, filtration and dust collection, the air containing the dust is released into the atmosphere as clean air to prevent air pollution. Will improve.

The results of measuring the amount of dust collected at the time of dust collection for the porous dust collecting / collecting device filter using the thermoplastic synthetic resin of the present invention as shown in FIG. 3.

As can be seen in the figure, when using the dust collector / collector filter of the present invention showed a slight uniformity over time but a relatively uniform dust collection capacity as a whole.

On the other hand, in the above description mainly described the dust collection process, the dust / collecting device filter of the present invention was confirmed that the excellent performance as a collecting device filter in the water purification process.

As described above, according to the porous dust collecting / collecting device filter using the thermoplastic synthetic resin of the present invention and a method for manufacturing the same, the porous dust collecting / collecting device filter obtained by coating Teflon on the surface of the core filter serving as a filter medium is collected and collected by water filtration. Since the process is performed on the surface of Teflon coating, there is no permeation of dust or water, no clogging of internal pores, and it improves the poor durability of the conventional nonwoven filter and also has excellent wear resistance, chemical resistance and heat resistance. And application is expected.

Claims (4)

The thermoplastic synthetic resin was press-molded, heat-treated at 80-90 ° C. for 4 to 5 hours in a kiln, cooled at room temperature for 2 to 3 hours, and then demolded to form a core filter 2, and then mixed with a teflon powder in a binder. Spray coating of 5 ~ 20㎛ thickness on the surface of the filter (2), then heat treated at 40 ~ 50 ℃, fusion and cooling, so that the coating filter (3) of Teflon is coated on the surface of the core filter (2) Method for producing a porous dust collecting / collecting device filter using a thermoplastic synthetic resin. The method of claim 1, The thermoplastic synthetic resin has a fine pores and a porous dust collecting / collecting device filter using a thermoplastic synthetic resin, characterized in that the polyethylene having a porosity of 50 ~ 60%. Porous dust collecting / collecting device filter using a thermoplastic synthetic resin obtained by the method of claim 1. Porous dust collecting / collecting device filter using a thermoplastic synthetic resin obtained by the method of claim 2.