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Special-purpose needled felt for complex condition coal fired power plants and preparation method thereof

A technology for coal-fired power plants and complex working conditions, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of difficult manufacturing process, high price, difficult production and wide application, and improve the dust interception rate , low cost, and increased adhesion

Active Publication Date: 2012-09-19
福建鑫华股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polytetrafluoroethylene (PTFE for short, commonly known as the king of plastics) fiber has excellent acid and alkali resistance, high temperature resistance, and can withstand various complex working conditions. Relatively difficult, difficult to produce and widely used

Method used

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  • Special-purpose needled felt for complex condition coal fired power plants and preparation method thereof
  • Special-purpose needled felt for complex condition coal fired power plants and preparation method thereof
  • Special-purpose needled felt for complex condition coal fired power plants and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a. Preparation of plain felt:

[0036] Weaving warp and weft with 100% PTFE filaments into a grammage of 130g / m 2 The reinforced base cloth layer 13 of the reinforced base cloth layer 13, after unpacking the 2 groups of PPS fibers respectively, carry out loosening, mixing and carding in sequence, respectively laying 2 groups of carded PPS fibers on the upper and lower surfaces of the reinforced base cloth layer 13, through this laying The first semi-finished needle-punched felt 11 is rolled into a roll after prepunching; the first semi-finished needle-punched felt 11 includes an auxiliary filter layer 14 punctured by PPS fibers that are needle-punched up and down sequentially, and a reinforced base cloth woven by PTFE filaments. Layer 13, and the support layer 15 punctured by PPS fibers, the number of laying layers is: 12 layers on the support layer 15, 6 layers on the auxiliary filter layer 14, and the weight after pre-stabbing is guaranteed to be 440g / m 2 ; By contro...

Embodiment 2

[0055] a. Preparation of plain felt:

[0056] Weaving warp and weft with 100% PTFE filaments into a grammage of 130g / m 2 The reinforced base cloth layer 13 of the reinforced base cloth layer 13, the two groups of PPS fibers are respectively unpacked and then pre-opened, mixed and carded sequentially, and two groups of carded PPS fibers are respectively laid on the upper and lower surfaces of the reinforced base cloth layer 13, through which The first semi-finished needle-punched felt 11 is formed into a roll after laying and prepunching; the first semi-finished needle-punched felt 11 includes an auxiliary filter layer 14 made of PPS fibers that are needle-punched up and down sequentially, and a reinforcement made of PTFE filaments. The base fabric layer 13, and the support layer 15 punctured by PPS fibers, the number of laying layers is: 12 layers on the support layer 15, 6 layers on the auxiliary filter layer 14, and the weight after pre-stabbing is guaranteed to be 440g / m 2...

Embodiment 3

[0067] a. Preparation of plain felt:

[0068] Weaving warp and weft with 100% PTFE filaments into a grammage of 130g / m 2 The reinforced base cloth layer 13 of the reinforced base cloth layer 13, after unpacking the 2 groups of PPS fibers respectively, carry out loosening, mixing and carding in sequence, respectively laying 2 groups of carded PPS fibers on the upper and lower surfaces of the reinforced base cloth layer 13, through this laying The first semi-finished needle-punched felt 11 is rolled into a roll after prepunching; the first semi-finished needle-punched felt 11 includes an auxiliary filter layer 14 punctured by PPS fibers that are needle-punched up and down sequentially, and a reinforced base cloth woven by PTFE filaments. Layer 13, and the support layer 15 punctured by PPS fibers, the number of laying layers is: 12 layers on the support layer 15, 6 layers on the auxiliary filter layer 14, and the weight after pre-stabbing is guaranteed to be 440g / m 2 ;

[0069]...

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Abstract

The invention discloses a special-purpose needled felt for complex condition coal fired power plants, which comprises a dust receiving surface, an auxiliary filter layer, an strengthen base cloth layer and a support layer which are orderly composited together by needling, wherein the dust receiving surface is blended by polyphenylene sulfite (PPS) fibers, polytetrafluoroethylene (PTFE) fibers and polyimide (PI) fibers according to proportion of 1:(0.2-0.5):(0.2-0.5), the auxiliary filter layer and the support layer are respectively needled by the PPS fibers, and the strengthen base cloth layer is interlaced by PTFE filament yarns in longitude and latitude. The invention further discloses a method for preparing the special-purpose needled felt for the complex condition coal fired power plants. The dust receiving surface is blended by the PPS fibers, the PTFE fibers and the PI fibers, thereby being low in cost, and increasing transverse and longitudinal strength of the special-purpose needled felt. Probability of intercept and filter precision of dust are increased through element felt preparation, immersion treatment, calendering processing and singeing process, thereby leading instantaneous using temperature of the special-purpose needled felt to increase and to be less affected by ozone, increasing oxidation resistance, prolonging service life, being further capable of improving strip ratio of the dust, increasing ventilation property of the special-purpose needled, and reducing operation energy consumption.

Description

technical field [0001] The invention relates to a filter material, in particular to a special needle-punched felt for coal-fired power plants with complicated working conditions and a preparation method thereof. Background technique [0002] Application examples at home and abroad have proved that the bag filter has become an effective device for controlling industrial smoke and fine particles. Due to the influence of coal type and specific resistance, it is difficult to meet the current domestic power plant operating conditions, so the electric bag filter has become the current power plant. A big trend in dust removal. [0003] The dust concentration at the outlet of the bag filter is less than 50mg / Nm 3 , compared with the electrostatic precipitator, the bag filter is not affected by the specific resistance of the fly ash, the change of the fly ash concentration and particle size, the flue gas fluctuation and the change of the boiler operating load have little effect on t...

Claims

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Application Information

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IPC IPC(8): B01D39/16B32B27/02B32B27/08D06C15/00D06C9/00D06M15/256D06M15/55D06M15/643D06M11/79D06M11/46D06M11/36
Inventor 张乐伟曾鹏程张国施纯秒曾梦怡
Owner 福建鑫华股份有限公司
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