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A high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification and its preparation method

A technology of low-temperature catalysis and filter materials, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as catalyst poisoning failure, filter material damage, and catalyst easy to fall off

Active Publication Date: 2019-09-06
XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The composition of industrial smoke and dust is complex, and there are mutual influences and coupling effects among various pollutants. The method of spreading catalyst on the surface of the filter material or impregnating the filter material as a whole to absorb catalyst particles has shortcomings. The former catalyst is easy to fall off. The impregnation method involving strong acid or strong alkali will damage the filter material to a certain extent. On the other hand, the filtration mechanism of ordinary filter material is deep filtration, and the dust surface is exposed to a large amount of dust to wash away, and the dust is easy to enter the filter material to block the filter material. Pores and the rapid formation of the powder cake layer also make it difficult for the catalyst on the dust side to work effectively, and the flue gas usually contains heavy metals such as mercury, lead, and arsenic, which can easily poison the catalyst on the dust side

Method used

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  • A high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification and its preparation method
  • A high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example prepares a high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification. The specific steps are:

[0036] Pre-prepared catalyst coating solution, 60 parts of MnFe 2 o 4 / ACF, 40 parts of MnFe 2 o 4 / CNTs mixed catalyst, 20 parts of α, ω-dihydroxypolydimethylsiloxane with a dynamic viscosity (25°C) of 300mPa·s, 8 parts of phenyl silicone oil with a dynamic viscosity (25°C) of 100mPa·s Add it into a power mixer, stir at a speed of 600rpm for 20min, then add 2 parts of γ-glycidyl etheroxypropyl trimethoxysilane, stir for 10min at a pressure of -0.3MPa and a speed of 1000rpm, and then add 1 part of benzene Tributanone oxime silane and 0.1 part of tin dilaurate were stirred for 10 minutes at a pressure of -0.1 MPa and a rotation speed of 800 rpm to prepare a catalyst coating solution.

[0037] Step 1. The sea-island type PPS superfine fiber with a fineness of 0.3 denier, the PPS superfine fiber with a f...

Embodiment 2

[0045] This example prepares a high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification. The specific steps are:

[0046] Pre-prepared catalyst coating solution, 30 parts of MnFe 2 o 4 / ACF, 40 parts of MnFe 2 o 4 / CNTs, 30 copies of Y 2 o 3 -MnOx / ZrO 2 Mixed catalyst, 30 parts of α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity (25°C) of 500 mPa·s, and 10 parts of phenyl silicone oil with a dynamic viscosity (25°C) of 100 mPa·s In the mixer, stir for 30min at a speed of 800rpm, then add 2 parts of γ-glycidyl etheroxypropyl trimethoxysilane, stir for 10min at a pressure of -0.3MPa, and a speed of 1000rpm, then add 1 part of phenyl trimethoxysilane in sequence Butanone oxime silane and 0.3 parts of tin dilaurate were stirred for 10 min at a pressure of -0.1 MPa and a rotation speed of 800 rpm to prepare a catalyst coating liquid.

[0047] Step 1. Split-type PEI ultra-fine fibers with a fineness of 0....

Embodiment 3

[0055] This example prepares a high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification. The specific steps are:

[0056] Pre-prepared catalyst coating solution, 50 parts of MnFe 2 o 4 / ACF, 50 copies of Y 2 o 3 -MnOx / ZrO 2 Mixed catalyst, 20 parts of α, ω-dihydroxypolydimethylsiloxane with a dynamic viscosity (25°C) of 100 mPa·s, and 5 parts of phenyl silicone oil with a dynamic viscosity (25°C) of 500 mPa·s In the mixer, stir for 20min at a speed of 400rpm, then add 2 parts of γ-glycidyl etheroxypropyl trimethoxysilane, stir for 10min at a pressure of -0.3MPa, and a speed of 500rpm, then add 1 part of phenyl trimethoxysilane in sequence Butanone oxime silane and 0.2 parts of tin dilaurate were stirred for 10 min at a pressure of -0.1 MPa and a rotation speed of 800 rpm to prepare a catalyst coating solution.

[0057] Step 1. The split-type P84 ultra-fine fiber with a fineness of 0.3 denier, the P84 ultra-fine f...

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Abstract

The invention discloses a high-temperature-resistant filtering material with ultra-clean filtering and low-temperature catalytic denitration functions, and a preparation method thereof. The filtering material successively comprises, from a dust-facing surface, an island-type or fragment-type extremely superfine fiber layer, a superfine fiber layer, a PTFE sewing-thread base-cloth layer, a fine-denier fiber layer, a high-temperature-resistant adhesive layer and a catalyst coating. The high-temperature-resistant filtering material provided by the invention has the excellent characteristics of a large specific surface area, high porosity and the like, can realize ultralow dust discharge and has superhigh filtration accuracy and good filtering effect; a catalyst is uniform in distribution, firm in loading, high in catalysis efficiency, good in anti-sulfur effect and long in service life; the preparation method for the filtering material is simple in process and easy for realization of industrialization; the catalyst is not prone to poisoning and long in service life; and the high-temperature-resistant filtering material is applicable to flue gas filtering under complex conditions like high working temperature, great dust content and high requirements on filtration accuracy, and can realize low-temperature denitration of nitrogen oxides in flue gas without extra heating while realizing high-precision filtering.

Description

technical field [0001] The invention relates to a flue gas filter material, in particular to a high-temperature-resistant filter material with ultra-clean filtration and low-temperature catalytic denitrification and a preparation method thereof. It belongs to the technical field of environmental protection dust removal and filtration. Background technique [0002] In order to improve my country's atmospheric environment quality, my country promulgated a series of air pollutant emission standards in 2011, "Emission Standards of Air Pollutants for Thermal Power Plants", "Emission Standards of Pollutants for Coking Chemical Industry", "Emission Standards of Air Pollutants for Steelmaking Industry" "Standard", etc., the dust emission concentration of thermal power plants will be reduced from 100mg / m2 in 2002 3 down to 30mg / m 3 , the upper limit of dust emission concentration in key areas is 20 mg / m 3 , the emission concentration of sulfur dioxide requires an emission limit of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14B01D39/16B01D53/86B01D53/56B32B27/02B32B27/12B32B33/00B32B7/12B01J31/32B01J31/38
Inventor 蔡伟龙王巍刘滨郑锦森李彪邱薰艺黄磊戴婷婷
Owner XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD
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