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Inorganic fiber filter felt and its preparation method

A technology of inorganic fibers and filter felts, applied in the field of filter felts, can solve problems such as large fiber damage and achieve good use effects

Active Publication Date: 2014-08-20
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The filter material of the existing filter bag is processed by mechanical web carding, which causes great damage to the fiber, especially to glass fiber and other inorganic fibers with poor wear resistance and folding resistance; in addition, the existing acupuncture filter material is Three-layer sandwich symmetrical structure, the base fabric layer is in the middle, the upper layer of the base fabric layer is the dust-receiving layer, and the lower layer of the base fabric layer is the bottom layer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Inorganic fiber filter felt and its preparation method
  • Inorganic fiber filter felt and its preparation method
  • Inorganic fiber filter felt and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] [Example 1] Preparation method of glass fiber filter felt

[0037] Step 1: Prepare the dust layer 1

[0038] The dust-catching layer 1 is made of glass fibers with a diameter of 5 microns and a length of 60 mm, which is formed into a fiber net by air-laying and has a weight of 250 grams per square meter.

[0039] Step 2: Preparation of Adhesion Layer 2

[0040] The adhesion layer 2 is made of glass fibers with a diameter of 5 microns and a length of 60 mm, which is air-laid to form a fiber web with a weight of 250 grams per square meter.

[0041] Step 3: Prepare base fabric support layer 3

[0042] The base cloth support layer 3 is made of glass fiber filaments with a diameter of 7 microns, which are processed into the base cloth support layer 3 through interweaving of warp and weft yarns, and its weight per square meter is 500 grams.

[0043] Step 4: Connect and reinforce

[0044] The dust-facing layer 1 is placed on the adhesion layer 2 by air-laying, and then pla...

Embodiment 2

[0053] [Example 2] Preparation method of basalt fiber filter felt

[0054] Step 1: Prepare the dust layer 1

[0055] The dust-facing layer 1 is made of basalt fibers with a diameter of 5 microns and a length of 60 mm. The fiber web is formed by air-laying, and its weight per square meter is 250 grams; the dust-facing layer 1 is needled by a needle punching machine. , the acupuncture depth is 3 mm, and the acupuncture frequency is 400 times / min.

[0056] Step 2: Preparation of Adhesion Layer 2

[0057] The adhesion layer 2 is made of basalt fibers with a diameter of 5 microns and a length of 60 mm. The fiber web is formed by air laying, and the weight per square meter is 250 grams; The depth is 5 mm, and the needling frequency is 500 times / min.

[0058] Step 3: Preparation of base cloth support layer 3

[0059] The base cloth support layer 3 is made of basalt fiber filaments with a diameter of 7 microns, which are interlaced with warp and weft yarns to be processed into the b...

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Abstract

The invention relates to an inorganic fiber filter felt, which comprises from outside to inside: a dustward layer formed by cross lapping of inorganic fibers, an adhesive layer formed by cross lapping of inorganic fibers, and a base cloth supporting layer woven by inorganic fiber filaments. The inorganic fibers can be one kind of glass fibers, basalt fibers, ceramic fibers or stainless steel fibers. The dustward layer is placed on the adhesive layer by means of air laying, the adhesive layer is placed on the base cloth supporting layer by means of air laying, and the dustward layer, the adhesive layer and the base cloth supporting layer are reinforced through needling and hooking. The preparation method of the inorganic fiber filter felt consists of: dustward layer preparation, adhesive layer preparation, base cloth supporting layer preparation, reinforcement by hooking, emulsion dipping, and drying. The inorganic fiber filter felt of the invention has filtration accuracy up to 99.99%, running resistance lower than 800Pa, dust emission concentration less than 10mg / Nm<3>, as well as good using effect, and can be used for over 3 years under a working condition of 280DEG C-350DEG C.

Description

technical field [0001] The invention relates to a filter felt, in particular to an inorganic fiber filter felt used in the field of dust removal and a preparation method thereof. Background technique [0002] At present, in the field of flue gas dust removal, due to the high ambient temperature, complex composition and strong corrosion, the requirements for the filtration accuracy and use of filter felt are very high. With the further improvement of national environmental protection standards, especially for industries with serious pollution such as steel, electric power, cement, and waste incineration, the emission concentration of dust is required to be lower and lower. The dust removal method has changed from electric dust removal to bag dust removal. Bag dust removal has many advantages such as high filtration accuracy and low equipment operation resistance. High temperature resistance, corrosion resistance, higher filtration accuracy, lower equipment operation resistan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20B32B5/26
Inventor 刘江峰徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH