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Non-woven filter cloth for denitrification and preparation method thereof

A filter cloth and denitration technology, which is applied in the field of material processing, can solve the problems of secondary air pollution, difficulty in controlling ammonia gas, and high processing costs, and achieve the effects of low processing cost, easy realization and high removal rate.

Active Publication Date: 2017-02-15
ANHUI LITE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method for denitrification to prevent NOx emissions is mainly to use urea or ammonia to reduce NOx in the flue gas to nitrogen and oxygen, so that the high-temperature combustion flue gas can meet the emission standards, but the method of using urea or ammonia to reduce NOx is not only The process is complicated, the treatment cost is high, and the ammonia gas is difficult to control and may even cause secondary air pollution

Method used

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  • Non-woven filter cloth for denitrification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Weigh polypropylene powder, polyacrylic acid and cerium amine nitrate according to the weight ratio of 80:7:0.2, mix the polypropylene powder and polyacrylic acid, and then add cerium amine nitrate, and pass the mixture of the three through a twin-screw The extruder is extruded in one step to obtain a modified polypropylene composite material. The extrusion temperature of the twin-screw extruder is 200 ° C, and the rotation speed of the screw is 20 rpm. The molecular weights of the polypropylene powder and polyacrylic acid are respectively 6000 and 3000;

[0020] 2) According to the weight ratio of 6:4, the polypropylene chips are mixed with the polypropylene composite material prepared in step 1), and then spun by a spinning machine to obtain long fibers and short fibers with diameters between 2-12D;

[0021] 3) Long fiber and short fiber are respectively woven into long fiber cloth and short fiber cloth by shuttle machine;

[0022] 4) Use long-fiber cloth of 1200D...

Embodiment 2

[0026] 1) Weigh polypropylene powder, polyacrylic acid and potassium permanganate according to the weight ratio of 70:10:0.2, mix the polypropylene powder and polyacrylic acid, and then add potassium permanganate, and pass the mixture of the three A twin-screw extruder is extruded in one step to obtain a modified polypropylene composite material. The extrusion temperature of the twin-screw extruder is 200° C., and the screw speed is 20 rpm. The molecular weight of the polypropylene powder and polyacrylic acid 6000 and 3000 respectively;

[0027] 2) According to the weight ratio of 7:3, the polypropylene chips are mixed with the polypropylene composite material prepared in step 1), and then spun by a spinning machine to obtain long fibers and short fibers with diameters between 2-12D;

[0028] 3) Long fiber and short fiber are respectively woven into long fiber cloth and short fiber cloth by shuttle machine;

[0029] 4) Use long-fiber cloth of 1200D per bundle as the warp dire...

Embodiment 3

[0033] 1) Take polypropylene powder, polyacrylic acid and azobisisobutyronitrile according to the weight ratio of 75:10:0.2, mix the polypropylene powder and polyacrylic acid, then drop into azobisisobutyronitrile, and mix the three The mixture of the two is extruded through a twin-screw extruder in one step to obtain a modified polypropylene composite material. The extrusion temperature of the twin-screw extruder is 230° C., and the rotation speed of the screw is 30 rpm. The polypropylene powder, The molecular weights of polyacrylic acid are 6000 and 3000 respectively;

[0034] 2) According to the weight ratio of 8:2, the polypropylene chips are mixed with the polypropylene composite material prepared in step 1), and then spun through a spinning machine to obtain long fibers and short fibers with diameters between 2-12D;

[0035] 3) Long fiber and short fiber are respectively woven into long fiber cloth and short fiber cloth by shuttle machine;

[0036] 4) Use long-fiber clo...

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Abstract

The invention discloses nonwoven filter cloth for denitration and then discloses a preparation method of the nonwoven filter cloth for denitration. The preparation method comprises the following steps: a, mixing polypropylene powder body with polyacrylic acid, adding an initiating agent, then extruding a mixture of the polypropylene powder body, the polyacrylic acid and the initiating agent through a double-screw extruder to obtain a polypropylene composite material; b, mixing a polypropylene slice with the polypropylene composite material prepared in the step a according to a weight ratio of (6:4)-(8:2), then spinning into fibers under the condition that the temperature is 130-190 DEG C, wherein the polypropylene slice is a raw material commonly used in a fiber synthesis technology; c, weaving the fibers into nonwoven filter cloth; and d, firstly placing the nonwoven filter cloth in a metal ion-containing solution and soaking for 1-8 h, then placing in an alkali liquor with the temperature of 70-120 DEG C and soaking for 2-5h, taking out, and drying at high temperature to obtain the nonwoven filter cloth with a denitration function. The nonwoven filter cloth is low in processing cost, brings convenience to processing of NOx in smoke, and is easy to realize, and high in NOx removing rate.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a non-woven filter cloth for denitrification and a preparation method thereof. Background technique [0002] Power stations, incinerators, and jet engine combustors will emit NOx (i.e. nitrogen oxides) during high-temperature combustion. The large amount of NOx emissions is one of the main causes of acid rain, photochemical smog, and smog. NOx emission indicators are strictly regulated. At present, the method for denitrification to prevent NOx emissions is mainly to use urea or ammonia to reduce NOx in the flue gas to nitrogen and oxygen, so that the high-temperature combustion flue gas can meet the emission standards, but the method of using urea or ammonia to reduce NOx is not only The process is complicated, the treatment cost is high, and the ammonia gas is difficult to control and even causes secondary air pollution. Contents of the invention [0003] The primary purpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/16B01J35/02B01D53/86B01D53/56
Inventor 朱长效王献彪刘瑾李真
Owner ANHUI LITE ENVIRONMENTAL PROTECTION TECH