Dedusting filter bag, preparation method and application

Abstract

The invention discloses a dust removal filter bag, a preparation method and application, and relates to the technical field of bag type dust removal. The preparation method of the dust removal filter bag comprises the following steps: S1, yarn treatment: dipping yarns in a treatment solution A for yarn treatment; the treating fluid A is a mixture of tetrafluoro emulsion and / or vinylidene fluoride emulsion and water; s2, weaving into cloth: weaving the yarns treated in S1 into the cloth; s3, weaving treatment: treating the cloth prepared in S2 with a treating fluid B; the treating fluid B is a mixture of a polytetrafluoroethylene emulsion, a hydrolysis-resistant agent and water; s4, preparing a filter bag: preparing the cloth prepared in S3 into the dust removal filter bag. In conclusion, treatment is carried out through different treatment solutions in the two stages of yarn weaving and the two stages of yarn weaving, and the high temperature resistance and the acid and alkali corrosion resistance of the prepared dust removal filter bag are improved in the two stages of yarn weaving and the two stages of fabric weaving.

Description

Technical Field

[0001] The present application relates to the technical field of bag dust removal, and in particular to a dust removal filter bag, a preparation method and an application thereof. Background Art

[0002] Dust filter bags are important equipment for collecting dust and purifying gases in industrial production. They are widely used in cement, chemical, metallurgy, electric power and other industries, and play an important role in reducing environmental pollution and improving the working environment.

[0003] Since some dust removal environments are hot and corrosive, the environment in which the dust filter bag is located is relatively harsh, which has a great impact on the service life of the dust filter bag. Therefore, for different dust removal environments, the dust filter bag will be improved in structure, the material will be processed and modified, etc., to improve the performance of a certain aspect of the dust filter bag, so that it can better cope with the dust removal environment.

[0004] At present, the mainstream method is to immerse or spray the filter bag in a treatment liquid after it is made to improve the temperature resistance, hydrolysis resistance and corrosion resistance of the filter bag. However, due to continuous vibration and other reasons during the dust removal process, its performance decreases rapidly, so it cannot maintain its performance for a long time. It is necessary to develop a dust removal filter bag with long-lasting performance to increase its service life in harsh environments. Summary of the invention

[0005] In order to solve at least one of the above technical problems and develop a dust removal filter bag with long-lasting performance, the present application provides a dust removal filter bag, a preparation method and an application.

[0006] On the one hand, the present application provides a method for preparing a dust removal filter bag, comprising the following steps:

[0007] S1. Yarn processing

[0008] The yarn is immersed in a treatment liquid A to perform yarn treatment; the treatment liquid A is a mixture of a tetrafluoroethylene emulsion and / or a vinylidene fluoride emulsion and water;

[0009] S2, weaving into cloth

[0010] Weaving the yarn treated by S1 into cloth;

[0011] S3, weaving processing

[0012] The cloth prepared in S2 is treated with a treatment liquid B; the treatment liquid B is a mixture of a tetrafluoro emulsion, an anti-hydrolysis agent and water;

[0013] S4. Preparation of filter bags

[0014] The cloth prepared in S3 is prepared into a dust removal filter bag.

[0015] Optionally, in the treatment liquid A, tetrafluoro emulsion and / or vinylidene fluoride emulsion accounts for 10-15 wt%.

[0016] Optionally, in the treatment liquid B, the tetrafluoro emulsion accounts for 10-15wt% and the anti-hydrolysis agent accounts for 20wt%.

[0017] Optionally, the treatment liquid A is a mixture of vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 10-15wt%; the treatment liquid B is a mixture of tetrafluoro emulsion, anti-hydrolysis agent and water, wherein the tetrafluoro emulsion accounts for 10-15wt% and the anti-hydrolysis agent accounts for 20wt%.

[0018] Optionally, the anti-hydrolysis agent is silicone resin.

[0019] Optionally, in S3, the treatment method is dipping or spraying

[0020] In a second aspect, the present application provides a dust removal filter bag prepared by the above-mentioned preparation method.

[0021] On the third aspect, the present application provides the application of the above-mentioned dust filter bag in the field of high-temperature dust removal.

[0022] In summary, the present invention improves the high temperature resistance and acid and alkali corrosion resistance of the prepared dust filter bag at the yarn and fabric levels by treating the yarn and fabric with different treatment liquids respectively. DETAILED DESCRIPTION

[0023] The present application is further described in detail below with reference to the embodiments.

[0024] In the following preparation examples / embodiments of the present application, the main components involved, unless otherwise specified, were purchased from commercially available products.

[0025] The yarn is exemplarily polyester yarn, and the filter bag model prepared is exemplarily polyester woven fabric-500.

[0026] Preparation Example 1

[0027] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 10 wt%.

[0028] Preparation Example 2

[0029] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 11 wt%.

[0030] Preparation Example 3

[0031] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 12 wt%.

[0032] Preparation Example 4

[0033] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 13wt%.

[0034] Preparation Example 5

[0035] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 14 wt%.

[0036] Preparation Example 6

[0037] This preparation example is used to provide a treatment liquid A, which is obtained by mixing tetrafluoro emulsion and water, wherein the tetrafluoro emulsion accounts for 15wt%.

[0038] Preparation Example 7

[0039] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 10wt%.

[0040] Preparation Example 8

[0041] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 11 wt %.

[0042] Preparation Example 9

[0043] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 12wt%.

[0044] Preparation Example 10

[0045] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 13wt%.

[0046] Preparation Example 11

[0047] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 14 wt%.

[0048] Preparation Example 12

[0049] This preparation example is used to provide a treatment liquid A, which is obtained by mixing vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 15wt%.

[0050] Preparation Example 13

[0051] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 10wt% and the methyl silicone resin accounts for 20wt%.

[0052] Preparation Example 14

[0053] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 11wt% and the methyl silicone resin accounts for 20wt%.

[0054] Preparation Example 15

[0055] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 12wt% and the methyl silicone resin accounts for 20wt%.

[0056] Preparation Example 16

[0057] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 13wt% and the methyl silicone resin accounts for 20wt%.

[0058] Preparation Example 17

[0059] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 14wt% and the methyl silicone resin accounts for 20wt%.

[0060] Preparation Example 18

[0061] This preparation example is used to provide a treatment liquid B, which is obtained by mixing tetrafluoro emulsion, methyl silicone resin and water, wherein the tetrafluoro emulsion accounts for 15wt% and the methyl silicone resin accounts for 20wt%.

[0062] Table 1

[0063]

[0064] Specific embodiments

[0066] Example 1

[0067] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0068] The yarn is immersed in the treatment liquid A prepared in Preparation Example 1 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 13; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0069] Example 2

[0070] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0071] The yarn is immersed in the treatment liquid A prepared in Preparation Example 2 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 14; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0072] Example 3

[0073] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0074] The yarn is immersed in the treatment liquid A prepared in Preparation Example 3 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 15; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0075] Example 4

[0076] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0077] The yarn is immersed in the treatment liquid A prepared in Preparation Example 4 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 16; and the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0078] Example 5

[0079] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0080] The yarn is immersed in the treatment liquid A prepared in Preparation Example 5 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 17; and the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0081] Example 6

[0082] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0083] The yarn is immersed in the treatment liquid A prepared in Preparation Example 6 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 18; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0084] The dust filter bags prepared in the above Examples 1 to 6 were tested for performance in accordance with the "GBT 6719-2009 Technical Requirements for Bag Dust Collectors". When the strength and elongation of the filter bags met the standards, the high temperature resistance and corrosion resistance of the filter bags were as shown in Table 2, wherein: X is the 24h thermal shrinkage rate of the filter bags at the continuous working temperature; Y is the 24h breaking strength retention rate at the continuous working temperature; Z is the breaking strength retention rate at the instantaneous working temperature; U is the breaking strength retention rate after acid treatment; V is the breaking strength retention rate after alkali treatment.

[0085] Table 2

[0086]

[0087]

[0088] It can be seen from Examples 1 to 6 and Table 2 that the dust filter bags prepared by the technical solution of the present application, in addition to meeting other requirements in the "Technical Requirements for Bag Dust Collectors GBT6719-2009", the filter bags have 24h thermal shrinkage rate at continuous working temperature, 24h breaking strength retention rate at continuous working temperature, breaking strength retention rate at instantaneous working temperature, breaking strength retention rate after acid treatment, and breaking strength retention rate after alkali treatment, which are all better than the performance of the "Technical Requirements for Bag Dust Collectors GBT 6719-2009".

[0089] Examples 7 to 12 are based on Examples 1 to 6, but the selection of the treatment liquid A is changed as follows.

[0090] Example 7

[0091] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0092] The yarn is immersed in the treatment liquid A prepared in Preparation Example 7 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 13; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0093] Example 8

[0094] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0095] The yarn is immersed in the treatment liquid A prepared in Preparation Example 8 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 14; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0096] Example 9

[0097] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0098] The yarn is immersed in the treatment liquid A prepared in Preparation Example 9 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 15; the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0099] Example 10

[0100] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0101] The yarn is immersed in the treatment liquid A prepared in Preparation Example 10 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 16; and the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0102] Embodiment 11

[0103] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0104] The yarn is immersed in the treatment liquid A prepared in Preparation Example 11 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 17; and the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0105] Example 12

[0106] This embodiment provides a dust removal filter bag, and the specific preparation method is as follows.

[0107] The yarn is immersed in the treatment liquid A prepared in Preparation Example 12 to treat the yarn; the yarn treated with the treatment liquid A is woven into cloth; the obtained cloth is sprayed with the treatment liquid B prepared in Preparation Example 18; and the cloth treated with the treatment liquid B is prepared into a dust filter bag.

[0108] The dust filter bags prepared in the above Examples 7 to 12 were tested for performance in accordance with the "GBT 6719-2009 Technical Requirements for Bag Dust Collectors". When the strength and elongation of the filter bags met the standards, the high temperature resistance and corrosion resistance of the filter bags were as shown in Table 3, wherein: X is the 24h thermal shrinkage rate of the filter bags at the continuous working temperature; Y is the 24h breaking strength retention rate at the continuous working temperature; Z is the breaking strength retention rate at the instantaneous working temperature; U is the breaking strength retention rate after acid treatment; and V is the breaking strength retention rate after alkali treatment.

[0109] Table 3

[0110]

[0111] It can be seen from Examples 7 to 12 and Table 3 that, on the basis of the technical solution of the present application, the use of vinylidene fluoride emulsion in the treatment liquid A can further improve the high temperature resistance, acid and alkali corrosion resistance, etc. of the dust filter bag; It can be seen from Table 3 that the dust filter bags prepared in Examples 7 to 12, on the basis of meeting the "GBT 6719-2009 Technical Requirements for Bag Dust Collectors", have a significant decrease in the 24h thermal shrinkage rate at the continuous working temperature of the filter bags; the 24h breaking strength retention rate at the continuous working temperature, the breaking strength retention rate at the instantaneous working temperature, the breaking strength retention rate after acid treatment, and the breaking strength retention rate after alkali treatment are all significantly improved.

[0112] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a dust removal filter bag, characterized in that: The following steps are involved: S1. Yarn processing The yarn is immersed in a treatment liquid A to perform yarn treatment; the treatment liquid A is a mixture of a tetrafluoroethylene emulsion and / or a vinylidene fluoride emulsion and water; S2, weaving into cloth Weaving the yarn treated by S1 into cloth; S3, weaving processing The cloth prepared in S2 is treated with a treatment liquid B; the treatment liquid B is a mixture of a tetrafluoro emulsion, an anti-hydrolysis agent and water; S4. Preparation of filter bags The cloth prepared in S3 is prepared into a dust removal filter bag.

2. The dust removal filter bag according to claim 1, characterized in that: In the treatment liquid A, tetrafluoro emulsion and / or vinylidene fluoride emulsion accounts for 10-15 wt%.

3. The dust removal filter bag according to claim 1, characterized in that: In the treatment liquid B, the tetrafluoro emulsion accounts for 10-15wt% and the anti-hydrolysis agent accounts for 20wt%.

4. The dust removal filter bag according to claim 1, characterized in that: The treatment liquid A is a mixture of vinylidene fluoride emulsion and water, wherein the vinylidene fluoride emulsion accounts for 10-15wt%; the treatment liquid B is a mixture of tetrafluoro emulsion, anti-hydrolysis agent and water, wherein the tetrafluoro emulsion accounts for 10-15wt% and the anti-hydrolysis agent accounts for 20wt%.

5. The dust removal filter bag according to claim 1, characterized in that: The anti-hydrolysis agent is silicone resin.

6. The dust removal filter bag according to claim 1, characterized in that: In S3, the treatment method is dipping or spraying.

7. A dust removal filter bag, characterized in that: The product is prepared by the preparation method described in claim 1.

8. Use of the dust removal filter bag according to claim 7 in the field of high-temperature dust removal.

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