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Preparation method of premixed fiber gradient filter material

Inactive Publication Date: 2021-11-23
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 technical problem to be solved by the present invention is how to prevent the phenomenon that the filter material CV value is too large due to uneven premixing of the filter material prepared in normal production

Method used

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  • Preparation method of premixed fiber gradient filter material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of the PPS fiber premix

[0021] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Where D is the thickness of the fiber unit under moisture regain, weight in grams of 9000 meters of fiber length, denier referred denier (D), such as 9000 meters of fiber weight of 1 g of 1 denier, fiber density is constant when , the greater the denier, the coarser fibers.

[0022] D...

Embodiment 2

[0031] 1. Preparation of the PPS fiber premix

[0032] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Different wire diameter of spinneret discharge molten polyphenylene sulfide material, is the fiber filaments discharged, since the spinning nozzle is provided spinneret inner small wire diameter, the outer large wire diameter, and was annularly distributed at a ratio of 1: 1, the fibe...

Embodiment 3

[0040] 1. Preparation of the PPS fiber premix

[0041] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Different wire diameter of spinneret discharge molten polyphenylene sulfide material, is the fiber filaments discharged, since the spinning nozzle is provided spinneret inner small wire diameter, the outer large wire diameter, and was annularly distributed at a ratio of 1: 1, the fibe...

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Abstract

The invention provides a preparation method of a premixed fiber gradient filter material. The preparation method comprises the following steps of (1) preparation of premixed PPS (polyphenylene sulfide) fiber, namely dehydrating polyphenylene sulfide resin, and then heating and melting; weighing and spinning molten raw materials, enabling the raw materials to enter a channel, pre-mixing fibers with different finenesses in advance in the spinning process, winding, drafting and heat-setting the ejected fibers, and bundling, additionally winding and chopping heat-set PPS fiber filament cylinders to prepare PPS short fibers; and (2) preparing the premixed fiber gradient filter material. The preparation method has the advantages that a spinneret plate is transformed during fiber preparation, so that fibers with different fineness degrees are premixed in advance, the situation of non-uniform mixing in the filter material production process is improved, the CV value of the filter material is reduced, and meanwhile, the filter precision of the filter material is improved.

Description

Technical field [0001] The present invention relates to a method for preparing filter material, in particular a method for preparing the premix fiber gradient filter. Background technique [0002] In recent years, with the rapid development of industry, a significant increase in industrial emissions, energy conservation and the state has put forward higher requirements. Bag / dust removal due to high electrical efficiency bag filter, which can effectively control PM2.5 fine particulate matter, get more and more attention and application in coal-fired power plants. With increasingly stringent environmental requirements, more and more industries for low smoke emission requirements, which requires the production of the media more and more stringent. In order to improve filtration accuracy is generally a low concentration emissions, will choose the gradient filter or membrane filter media to increase the filtering effect, wherein the gradient filter in the production process, there i...

Claims

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Application Information

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IPC IPC(8): D04H13/00D04H1/4326D04H1/732B01D39/08B01D39/16B32B27/02B32B27/28B32B27/08B32B27/32B32B5/06
CPCD04H13/00D04H1/4326D04H1/732B01D39/1623B01D39/083B32B5/022B32B27/12B32B27/322B32B5/06B32B2262/02
Inventor 付素雅周冠辰梁燕胡呈杰吴肖
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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