JP2002011312A - Incinerator exhaust gas treatment filter and its production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incineration exhaust gas treatment filter which is heatresistant, chemical-resistant, antistatic, and excellent in efficiency in treating harmful gases contained in an exhaust gas. SOLUTION: This filter comprises a fabric-like or felt-like substrate material coated with a fluororesin layer containing at least 20 wt.% anatase titanium oxide in a coating weight of 10 g/m2 or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a filter for treating exhaust gas from an incinerator and a method for producing the same.

[0002]

2. Description of the Related Art Exhaust gas generated from municipal waste incinerators and the like contains various harmful gases in addition to general dust. Since the exhaust gas contains dioxins, which have recently become a problem, removal of harmful gases from the exhaust gas is required from the viewpoint of environmental improvement.

[0003] In response to the above demand, incinerator exhaust gas treatment filters are used. Since heat resistance, chemical resistance and the like are required for this filter, a heat-resistant base material such as a fluororesin is used. In addition, since the filter may react with the exhaust gas when charged, the filter has recently been required to have antistatic properties. However, fluororesins and the like were inferior in antistatic properties. Japanese Patent Publication No. 8-6236 discloses a bag filter in which a felt in which a fluorine resin fiber and a carbon fiber are mixed is formed in a bag shape as an incinerator exhaust gas treatment filter. In this bag filter, the carbon resin having both heat resistance and antistatic properties is used in combination with the fluororesin fiber to secure the above-mentioned properties. However, this bag filter has insufficient removability of the collected dust, and in order to reuse the bag filter, it was necessary to remove the collected dust by backwashing.

Japanese Patent Application Laid-Open No. 11-19431 discloses a filter for treating an exhaust gas from an incinerator made of a fluororesin fiber containing a metal compound having a photocatalytic function. Such an incinerator exhaust gas treatment filter has an antistatic property due to the effect of lowering the surface resistance of the fluororesin fiber by the metal compound, and also has good removability of collected dust. In addition, it also has a function of decomposing and removing organic substances such as harmful gases in exhaust gas by the photocatalytic function of the metal compound. However, such incinerator exhaust gas treatment filters
After stretching the laminate of the unstretched fluororesin sheet and the photocatalyst-containing fluororesin layer, firing to a porous sheet,
Further, it is manufactured by fiberizing the laminated stretched sheet. As a result, the ratio of the metal compound-containing layer to the surface area of the fiberized incinerator exhaust gas treatment filter is reduced, and the efficiency of treating harmful gases in the exhaust gas cannot be said to be sufficient. Is
There was room for improvement in these performances.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an incinerator exhaust gas treatment filter having heat resistance, chemical resistance and antistatic properties, and also having an excellent treatment efficiency for harmful gases in exhaust gas. It is.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and found that the filter for incinerator exhaust gas treatment having the following structure containing a predetermined amount of anatase type titanium oxide provided the above object. Have been achieved, and the present invention has been completed.

That is, the present invention relates to a woven fabric
Anatase-type titanium oxide on the surface of
A fluorine resin layer containing 20 wt% or more has an attached amount of 10 g.
/ M ^Two Incinerator exhaust gas treatment filter formed above
-

[0008] The incinerator exhaust gas treatment filter of the present invention uses a heat-resistant substrate, so that it has good heat resistance and chemical resistance. Since the heat-resistant substrate is woven or felt,
The fluororesin layer containing anatase type titanium oxide can be efficiently formed on the filter surface, and the exhaust gas treatment efficiency can be improved.

The anatase type titanium oxide contained in the fluororesin layer is a semiconductor, has a function of lowering the surface resistance of the filter, and can impart an antistatic property to the filter. Further, since anatase type titanium oxide has a photocatalytic function, it has a function of decomposing and removing organic substances such as harmful gases in exhaust gas. Furthermore, since anatase-type titanium oxide also has an adsorbing action, it has a good ability to adsorb harmful gases in exhaust gas, and has a high exhaust gas treatment efficiency.

In addition, the content of anatase type titanium oxide which contributes to the decomposition of the exhaust gas and the surface resistance is adjusted to be at least 20 wt%, preferably at least 30 wt% in the fluororesin layer. If the content is less than 20% by weight, the surface resistance increases, and the exhaust gas has insufficient decomposition performance, which is not preferable. The upper limit of the content of the anatase type titanium oxide in the fluororesin layer is not particularly limited,
Usually, from the viewpoint of the strength of the coating film, it is preferably 80 wt% or less.

The amount of the fluororesin layer containing anatase type titanium oxide also contributes to the decomposition of the exhaust gas and the surface resistance. The amount of the adhesion is 10 g / m ² or more, preferably 20 g / m ² or more. is there. Adhesion amount is 10 g / m ²
If it is less than 1, the surface resistance increases, and the decomposition performance of exhaust gas is not sufficient, which is not preferable. The upper limit of the adhesion amount is not particularly limited.
g / m ² or less.

Further, the present invention provides an anatase-type titanium oxide on a surface of a woven or felt-like heat-resistant substrate.
a fluorine resin layer containing at least 10% by weight of 10 g / m ²
The present invention relates to a method for manufacturing an incinerator exhaust gas treatment filter formed as described above. According to such a manufacturing method, the incinerator exhaust gas treatment filter can be manufactured.

[0013] The incinerator exhaust gas treatment filter is preferably further laminated with a polytetrafluoroethylene porous body.

By laminating a porous polytetrafluoroethylene material on an incinerator exhaust gas treatment filter, the efficiency of exhaust gas treatment can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The heat-resistant substrate used in the present invention is glass fiber, polytetrafluoroethylene (PT).
FE) and the like. The heat-resistant substrate is in the form of a woven fabric or a felt. Specific examples of such a heat-resistant substrate include, for example,
As the glass fiber woven fabric, Kanebo KS4155TR,
KS4200TR, Unitika Glass Fiber # 8
00 and the like. Further, as PTFE felt, Toyoflon Felt BF700S manufactured by Toray Industries, Inc.,
Commercial products such as BF800S can be used.

The formation of the fluororesin layer on the surface (one or both surfaces) of the heat-resistant base material is performed, for example, by applying a dispersion of a fluororesin powder and anatase-type titanium oxide to the surface of the heat-resistant base material and firing. Thereby, it can be suitably formed. The content of the anatase type titanium oxide in the fluororesin layer and the amount of the fluororesin layer adhered are adjusted so as to be within the above ranges.

As the fluorine resin, polytetrafluoroethylene (PTFE) powder, polytetrafluoroethylene / perfluoroalkylvinyl ether copolymer (P
FA) powder, polytetrafluoroethylene / hexafluoropropylene copolymer (FEP) powder and the like are preferable.
Among them, PTFE having excellent chemical stability is preferable as the fluororesin. The above dispersion can be prepared by dispersing anatase type titanium oxide in a fluororesin dispersion. As the polytetrafluoroethylene powder dispersion, commercially available products such as XAD936 and XAD639 manufactured by Asahi Glass Fluoropolymers can be used. As a dispersion of polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer powder, AD2CR manufactured by Daikin Industries, Ltd. is used.
And other commercially available products can be used. As the polytetrafluoroethylene / hexapropylene copolymer powder dispersion, commercially available products such as ND-1 manufactured by Daikin Industries, Ltd. can be used.

The anatase type titanium oxide is preferably a powder having an average particle size of 0.2 to 5 μm from the viewpoint of adsorption characteristics and catalytic characteristics. Examples of the anatase-type titanium oxide powder include ST-01 manufactured by Ishihara Sangyo, aqueous dispersion NTI-4 of anatase-type titanium oxide powder manufactured by Resino Color Industries, and AC-10 aqueous dispersion of anatase-type titanium oxide powder manufactured by Dainichi Seika. Can be used.

The incinerator exhaust gas treatment filter of the present invention comprises:
Although not particularly limited, the pressure loss is usually 50
mmH is a ₂ O or less, the collection efficiency is, usually, from 50 to 99
%.

[0020] A porous polytetrafluoroethylene can be laminated on the incinerator exhaust gas treatment filter of the present invention.
The lamination method is not particularly limited, and may be any of a lamination method and an adhesion method using an adhesive. As the adhesive, a fluororesin-based adhesive is preferable. The average pore diameter of the polytetrafluoroethylene porous body is about 0.1 to 2 μm, preferably 0.1 to 2 μm.
1 to 1 μm. Its thickness is about 1 to 50 μm.

The incinerator exhaust gas treatment filter of the present invention comprises:
After being subjected to incinerator exhaust gas treatment, exhaust gas adsorbed by light irradiation or heating can be decomposed and removed for reuse. Specifically, the light irradiation is performed by irradiating sunlight or a UV lamp, and the heating is performed at 200 to 300 ° C. to decompose and remove the adsorbed components, regenerate, and reuse the light.

Examples of the harmful gases of the exhaust gas from the incinerator to be treated include acidic gases such as acetaldehyde and formaldehyde, neutral gases such as toluene and xylene, and basic gases such as ammonia.

[0023]

Next, an embodiment will be described.

Example 1 First, KS4155TR manufactured by Kanebo Co., Ltd. was used as a glass woven fabric.
Was cut into 300 mm x 450 mm. Next, as a coating solution, a composition ratio (weight ratio), PTFE / titanium oxide (8/2), PTFE dispersion solution, AD936 (Asahi Glass Fluoropolymers Co., Ltd.) (base concentration 60 wt% product) and titanium oxide aqueous dispersion , stirred blended Rejinokara industry Co., Ltd. NTI-4 (average particle diameter _0. 3 [mu] m) and distilled water to obtain a coating solution of the base concentration 35 wt%. This coating solution was spray-coated on the glass woven fabric at a spray gun discharge rate of about 10 g / min for 1 minute (corresponding to an adhesion amount of 25 g / m ² ). After that, in a drying furnace, preliminary drying (drying of water) is performed at 120 ° C. for 2 minutes, and then baking is performed at 390 ° C. for 2 minutes, and then heat treatment is performed at 300 ° C. for 20 hours to obtain a PTFE dispersion solution. The surfactant contained therein and the surfactant contained in the aqueous titanium oxide dispersion were decomposed and removed to obtain a filter sheet. The filter sheet was evaluated for ventilation, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics (adsorption, UV decomposition) as described below.
Table 1 shows the results.

[Evaluation method of ventilation amount] JIS L109
6 (8.27.1A method).

[Evaluation Method of Collection Efficiency] JIS K09
01 (6.2). Dust gas is JIS Z
8901 (13 types) were used.

[Evaluation method of pressure loss] JIS K09
01 (Section 6.3).

[Evaluation method of surface resistance] JIS K 69
11 compliant.

[Evaluation Method of Hazardous Gas Treatment Characteristics] The obtained mesh filter sheet was 110 mm × 165 mm.
And left for 1 hour in sunlight to initialize an evaluation sample. Next, as shown in FIG. 2, the evaluation sample is wrapped around the cold cathode tube 15 of the evaluation unit 10 once and fixed with a stapler,
SUS case 14 (40mmφ × 170m)
m). As shown in FIG. 1, this evaluation unit 10 is connected to a DC cable in the vacuum desiccator 3 and
It was inserted into the vacuum desiccator 3 of L. The vacuum pump 2 was connected to the vacuum desiccator 3 and decompression was continued for 5 minutes, and the pressure was reduced to 750 mmHg by cage pressure.

A vacuum desiccator 3 was filled with a standard gas from a cylinder 1 of nitrogen gas-based acetaldehyde standard gas (160 ppm) manufactured by Nippon Sanso Corporation to normal pressure. By driving only the blower fan 13 and monitoring the decrease in the concentration of acetaldehyde with the photoacoustic gas monitor 4, the concentration of acetaldehyde when the amount of adsorption reaches equilibrium and the initial concentration of 160 pp
The difference from m was determined and used as the physical adsorption amount (see FIG. 3). When the amount of acetaldehyde adsorbed reached equilibrium, the UV lamp 11 of the evaluation unit 10 was turned on, and the photocatalytic effect was observed by the amount of carbon dioxide generated 30 minutes after UV irradiation (FIG. 3).
reference). The measurement result at that time was output by the notebook computer 5 (the result shown in FIG. 3 is the result of Example 4). still,
At this time, the blower fan 13 was driven.

Examples 2 to 4 Filter sheets were obtained in the same manner as in Example 1 except that the composition ratio (weight ratio) of the coating solution was changed as shown in Table 1. In the same manner as in Example 1, the evaluation of the ventilation rate, the collection efficiency, the pressure loss, the surface resistance, and the harmful gas treatment characteristics was performed. Table 1 shows the results.

Examples 5 to 7 Filter sheets were obtained in the same manner as in Example 1 except that the amount of coating solution (spray coating time) was changed as shown in Table 1. In the same manner as in Example 1, the evaluation of the ventilation rate, the collection efficiency, the pressure loss, the surface resistance, and the harmful gas treatment characteristics was performed. Table 1 shows the results.

Example 8 First, Toyoflon Felt BF700S manufactured by Toray was cut into 300 mm × 450 mm as PTFE felt. Next, as a coating solution, the composition ratio (weight ratio) was adjusted so that PTFE / titanium oxide (8/2) was obtained.
FE dispersion solution, Asahi Glass Fluoropolymers AD936 (base concentration 60 wt% product), titanium oxide aqueous dispersion, NTI-4 (average particle size: 0.3 μm) manufactured by Resino Color Industrial Co., Ltd., and distilled water are mixed and stirred to form a base concentration. 35w
A coating solution of t% was obtained. This coating solution was spray-coated on the above-mentioned PTFE felt at a spray gun discharge rate of about 10 g / min for 1 minute (equivalent to an adhesion amount of 25 g / m ² ). Thereafter, in a drying furnace, preliminary drying (drying of water) was performed at 120 ° C. × 2 minutes, and then a heat treatment at 300 ° C. × 20 hr was performed, so that the surfactant in the PTFE dispersion solution and the titanium oxide aqueous dispersion were dispersed. The surfactant was decomposed and removed to obtain a filter sheet. In the same manner as in Example 1, the filter sheet was evaluated for air permeability, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics. Table 1 shows the results.

Example 9 First, KS4155TR manufactured by Kanebo Co., Ltd. was used as a glass woven fabric.
Was cut into 300 mm x 450 mm. Next, as a coating solution, a composition ratio (weight ratio), PTFE / titanium oxide (8/2), PTFE dispersion solution, AD936 (Asahi Glass Fluoropolymers Co., Ltd.) (base concentration 60 wt% product) and titanium oxide aqueous dispersion , stirred blended Rejinokara industry Co., Ltd. NTI-4 (average particle diameter _0. 3 [mu] m) and distilled water to obtain a coating solution of the base concentration 35 wt%. This coating solution was spray-coated on the glass woven fabric at a spray gun discharge rate of about 10 g / min for 1 minute (corresponding to an adhesion amount of 25 g / m ² ). After that, in a drying furnace, preliminary drying (drying of water) is performed at 120 ° C. for 2 minutes, and then baking is performed at 390 ° C. for 2 minutes, and then heat treatment is performed at 300 ° C. for 20 hours to obtain a PTFE dispersion solution. The surfactant contained therein and the surfactant contained in the aqueous titanium oxide dispersion were decomposed and removed to obtain a filter sheet. The PTFE dispersion solution (Polyflon D2 undiluted solution manufactured by Daikin Industries, Ltd.) as an adhesive binder was spray-coated on the back surface of the filter sheet for about 1 minute at a spray gun discharge rate of about 10 g / min. A PTFE porous film (NTF5110, manufactured by Nitto Denko Corporation) was bonded to the adhesive binder-coated surface at a temperature of 390 ° C., a pressure of 10 kgf / cm ² and a pressure time of 1 minute by a hot press to obtain a filter sheet. In the same manner as in Example 1, the air permeability of the filter sheet,
The collection efficiency, pressure loss, surface resistance and harmful gas treatment characteristics were evaluated. Table 1 shows the results.

Example 10 First, as PTFE felt, Toyoflon Felt BF700S manufactured by Toray was cut into 300 mm × 450 mm. Next, as a coating solution, the composition ratio (weight ratio) was adjusted so that PTFE / titanium oxide (8/2) was obtained.
FE dispersion solution, Asahi Glass Fluoropolymers AD936 (base concentration 60 wt% product), titanium oxide aqueous dispersion, NTI-4 (average particle size: 0.3 μm) manufactured by Resino Color Industrial Co., Ltd., and distilled water are mixed and stirred to form a base concentration. 35w
A coating solution of t% was obtained. This coating solution was spray-coated on the above-mentioned PTFE felt at a spray gun discharge rate of about 10 g / min for 1 minute (equivalent to an adhesion amount of 25 g / m ² ). Thereafter, in a drying furnace, preliminary drying (drying of water) was performed at 120 ° C. × 2 minutes, and then a heat treatment at 300 ° C. × 20 hr was performed, so that the surfactant in the PTFE dispersion solution and the titanium oxide aqueous dispersion were dispersed. The surfactant was decomposed and removed to obtain a filter sheet. The PTFE dispersion solution (Polyflon D2 undiluted solution manufactured by Daikin Industries, Ltd.) as an adhesive binder was spray-coated on the back surface of the filter sheet for about 1 minute at a spray gun discharge rate of about 10 g / min. A PTFE porous film (NTF5110 manufactured by Nitto Denko Corporation) is heated and pressed to a temperature of 390 ° C.
A laminated filter sheet was obtained under the conditions of a pressure of 10 kgf / cm ² and a pressure time of 1 minute. In the same manner as in Example 1, the filter sheet was evaluated for air permeability, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics. Table 1 shows the results.

Comparative Example 1 KS4155TR manufactured by Kanebo Co., Ltd.
It cut out to 0 mm x 450 mm. In the untreated state, evaluation of the ventilation rate, the collection efficiency, the pressure loss, the surface resistance, and the harmful gas treatment characteristics was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 2 Toyoflon Felt BF700S manufactured by Toray Co., Ltd. was cut into 300 mm × 450 mm as PTFE felt. In the untreated state, evaluation of the ventilation rate, the collection efficiency, the pressure loss, the surface resistance, and the harmful gas treatment characteristics was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 3 First, KS4155TR manufactured by Kanebo Co., Ltd. was used as a glass woven fabric.
Was cut into 300 mm x 450 mm. Next, as a coating solution, a composition ratio (weight ratio), a PTFE dispersion solution such as PTFE / titanium oxide (85/15), AD936 (manufactured by Asahi Glass Fluoropolymers Mori, a base concentration of 60 wt% product) and a titanium oxide aqueous dispersion were used. And NTI-4 (average particle size: 0.3 μm) manufactured by Resino Color Industrial Co., Ltd. and distilled water were mixed and stirred to obtain a coating solution having a base concentration of 35% by weight. This coating solution was applied to the above-mentioned glass woven fabric, and the spray gun discharge rate was adjusted to about 10 g / min.
Min was spray coated (coating weight 25 g / m ² or equivalent). After that, in a drying furnace, preliminary drying (drying of water) is performed at 120 ° C. for 2 minutes, and then baking is performed at 390 ° C. for 2 minutes, and then heat treatment is performed at 300 ° C. for 20 hours to obtain a PTFE dispersion solution. The surfactant contained therein and the surfactant contained in the aqueous titanium oxide dispersion were decomposed and removed to obtain a filter sheet. In the same manner as in Example 1, the filter sheet was evaluated for air permeability, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics. Table 1 shows the results.

Comparative Example 4 First, as PTFE felt, Toyoflon Felt BF700S manufactured by Toray Co., Ltd. was cut into a piece of 300 mm × 450 mm. Next, as a coating solution, a PTFE dispersion solution having a composition ratio (weight ratio) of PTFE / titanium oxide (85/15), XAD936 (manufactured by Asahi Glass Fluoropolymers Co., Ltd.) (base concentration: 60 wt%) and titanium oxide water dispersion. Liquid, NTI-4 manufactured by Resino Color Industry Co., Ltd.
(Average particle size: 0.3 μm) and distilled water were mixed and stirred to obtain a coating solution having a base concentration of 35 wt%. This coating solution was spray-coated on the above-mentioned PTFE felt at a spray gun discharge rate of about 10 g / min for 1 minute (equivalent to an adhesion amount of 25 g / m ² ). Thereafter, in a drying furnace, preliminary drying (drying of water) was performed at 120 ° C. × 2 minutes, and then heat treatment at 300 ° C. × 20 hr was performed.
The surfactant in the PTFE dispersion solution and the surfactant in the aqueous titanium oxide dispersion were decomposed and removed to obtain a filter sheet. In the same manner as in Example 1, the filter sheet was evaluated for air permeability, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics. Table 1 shows the results.

Comparative Example 5 First, KS4155TR manufactured by Kanebo Co., Ltd. was used as a glass woven fabric.
Was cut into 300 mm x 450 mm. Next, as a coating solution, a composition ratio (weight ratio), PTFE / titanium oxide (8/2) PTFE dispersion solution, AD936 (manufactured by Asahi Glass Fluoropolymers Mori, base concentration 60 wt% product) and titanium oxide water dispersion And NTI-4 (average particle size: 0.3 μm) manufactured by Resino Color Industrial Co., Ltd. and distilled water were mixed and stirred to obtain a coating solution having a base concentration of 35% by weight. This coating solution was spray-coated onto the above-mentioned glass woven fabric at a spray gun discharge rate of about 10 g / min and spray-coated for 10 seconds (adhesion amount: 25 g).
/ M ² or equivalent). After that, in a drying furnace, preliminary drying (drying of water) is performed at 120 ° C. for 2 minutes, and then baking is performed at 390 ° C. for 2 minutes, and then heat treatment is performed at 300 ° C. for 20 hours to obtain a PTFE dispersion solution. Decomposes and removes the surfactant in the surfactant and the surfactant in the titanium oxide aqueous dispersion,
Obtain a filter sheet. In the same manner as in Example 1, the filter sheet was evaluated for air permeability, collection efficiency, pressure loss, surface resistance, and harmful gas treatment characteristics. Table 1 shows the results.

[0041]

[Table 1] The asterisk mark indicates that the air permeability was large, so that the measurement was performed on two sheets.

[0042]

The incinerator exhaust gas filter of the present invention is
A fluorinated resin layer containing anatase-type titanium oxide is formed on the surface of a woven or felt-like heat-resistant base material, and has good air permeability and is used for exhaust gas from incinerators as shown in Examples (Table 1). It is suitable for filters and has excellent antistatic properties and harmful gas treatment properties. In addition, the incinerator exhaust gas filters of these examples have good heat resistance and chemical resistance, and also have excellent dust releasability. As a result, the incinerator exhaust gas filter of the present invention can efficiently and safely remove harmful gases from exhaust gas in, for example, municipal waste incinerators and the like, and can contribute to improvement of environmental problems.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an apparatus used for evaluating adsorption performance in Examples and the like.

FIG. 2 is a sectional view showing an evaluation unit of the device shown in FIG.

FIG. 3 is a graph showing results of adsorption characteristics and photocatalytic characteristics in Example 4.

[Explanation of symbols]

 Reference Signs List 1 Acetaldehyde standard gas cylinder 4 Photoacoustic gas monitor 10 Evaluation unit 11 UV lamp 12 Evaluation sample

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3K070 DA01 DA07 DA24 DA25 DA27 DA32 4D019 AA01 BA04 BA06 BA13 BB02 BB03 BB10 BC11 BC12 CB04 CB06

Claims (3)

[Claims] An incinerator exhaust gas wherein a fluororesin layer containing anatase-type titanium oxide in an amount of 10 g / m ² or more is formed on a surface of a woven or felt-like heat-resistant base material. Processing filter. 2. An incinerator in which a fluororesin layer containing 20 wt% or more of anatase type titanium oxide is formed on the surface of a woven or felt-like heat-resistant base material so as to have an adhesion amount of 10 g / m ² or more. A method for producing an exhaust gas treatment filter. 3. The incinerator exhaust gas treatment filter according to claim 1, further comprising a polytetrafluoroethylene porous material laminated thereon.