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Wet-process preparation method and apparatus for metal fiber filtering material

A metal fiber and filter material technology, applied in the field of wet preparation of metal fiber filter materials, can solve the problems of broken foam, fiber loss, poor uniformity of felt, etc., and achieve the effect of low fiber loss and strong adaptability

Active Publication Date: 2014-08-20
苏州海普过滤分离科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method of dry felting is efficient, it has many disadvantages
First of all, the dry felting method using the air-flow deposition principle has a relatively high selectivity for metal fiber materials, and the metal fibers must have relatively good toughness, otherwise they are easy to break during the felting process, resulting in a large amount of fiber debris and affecting product quality.
Furthermore, there is a large amount of fiber loss in the process of dry felting, and the yield is not high.
In addition, for thinner or thicker metal fiber mats, the uniformity of the mats laid by this method is not good.

Method used

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  • Wet-process preparation method and apparatus for metal fiber filtering material
  • Wet-process preparation method and apparatus for metal fiber filtering material
  • Wet-process preparation method and apparatus for metal fiber filtering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A wet laying device for preparing single-layer metal fiber filter material, its structure is as follows figure 1 As shown, the device comprises a first stirring tank 1, a first wet-laid felting device 4, a first conveyor belt 7 and a first two-roller pre-press 6; the first stirred tank 1 and the first wet-laid felting The devices 4 are connected with pipelines; the first wet-laid felting device 4 is provided with a first vacuum mesh belt 5 and a first vacuum system 3, and the first vacuum system 3 is located below the first vacuum mesh belt 5 and is close to the first vacuum mesh belt 5. Vacuum mesh belt 5, the liquid inlet of the first wet method felting device 4 is positioned at the top of the first vacuum mesh belt 5; The first conveyor belt 7 is set behind the outlet of the first wet method felting device 4, and the first conveyor belt 7 It is on the same level as the first vacuum mesh belt 5; the two pressure wheels of the first two-roller pre-pressing machine 6 ar...

Embodiment 2

[0033] A wet laying device for preparing double-layer metal fiber filter material, its structure is as follows figure 2As shown, the device comprises a first stirring tank 1, a first wet-laid felting device 4, a first conveyor belt 7 and a first two-roller pre-press 6; the first stirred tank 1 and the first wet-laid felting The devices 4 are connected with pipelines; the first wet-laid felting device 4 is provided with a first vacuum mesh belt 5 and a first vacuum system 3, and the first vacuum system 3 is located below the first vacuum mesh belt 5 and is close to the first vacuum mesh belt 5. Vacuum mesh belt 5, the liquid inlet of the first wet method felting device 4 is positioned at the top of the first vacuum mesh belt 5; The first conveyor belt 7 is set behind the outlet of the first wet method felting device 4, and the first conveyor belt 7 It is on the same level as the first vacuum mesh belt 5; the two pressure wheels of the first two-roller pre-pressing machine 6 ar...

Embodiment 3

[0035] Adopt the wet laying device described in embodiment 1 to prepare single-layer metal fiber filter material:

[0036] First add 90kg of pure water into the first stirring tank 1, then add 450g of Carbopol 941 (Carbopol941), then start the stirring paddle to fully dissolve the Carbopol in the water; put 10kg of 316L stainless steel with a length of 5mm and a diameter of 12μm The fiber is added to the aqueous solution containing 0.5wt% carbomer resin, and stirred for 15 minutes to form a uniformly dispersed suspension; the next step, the prepared suspension is pumped into the first wet process by pump 2 at a speed of 5L / min. On the first vacuum mesh belt 5 (the width is 1.22 meters, and the running line speed is 0.8m / min) of the felting device 4, utilize the first vacuum system 3 below the first vacuum mesh belt 5 to penetrate the first vacuum mesh belt 5 The mesh of the liquid phase is drawn away, and the surface of the first vacuum mesh belt 5 forms a uniform metal fiber ...

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Abstract

The invention belongs to the technical field of metal filtering materials, and discloses a wet-process preparation method and an apparatus for a metal fiber filtering material. The wet-process preparation method comprises the following operation steps: adding a water-soluble binder into water and fully stirring; then adding metal short fiber and fully stirring for dispersing and further for obtaining a suspension containing the metal short fiber; continuously transferring the suspension containing the metal short fiber to a first vacuum net belt of a first wet-process felt-paving device, and utilizing a first vacuum system at the rear of the first vacuum net belt to pump away the liquid phase through mesh of the first vacuum net belt, so as to form a layer of uniform metal fiber filtering felt on the surface of the first vacuum net belt; and performing drying and preliminary rolling on the metal fiber filtering felt, and then performing high-temperature vacuum sintering or continuous rolling and sintering to finally obtain the sintered metal fiber filtering material. The method and the apparatus have high adaptability to metal fiber, and the metal fiber felt prepared through paving is relatively uniform.

Description

technical field [0001] The invention belongs to the technical field of metal filter materials, and in particular relates to a wet method for preparing metal fiber filter materials and a device thereof. Background technique [0002] Sintered metal fiber filter material is a new type of high-efficiency filter material, which has the advantages of high temperature resistance, corrosion resistance, strong dirt holding capacity and high filtration accuracy. Sintered metal fiber filter materials can be widely used in fluid filtration in petrochemical, polyester chemical fiber, biomedicine, food and beverage industries, as well as in high-temperature flue gas and dust filtration in technical fields such as thermal power generation and iron and steel metallurgy. [0003] The production process of sintered metal fiber filter material mainly includes two stages of felting and sintering. At present, the widely used felting method is dry felting. The dry matting-vacuum sintering metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
Inventor 徐小平
Owner 苏州海普过滤分离科技有限公司