A regeneration method for dust removal and denitrification multifunctional filter material

A filter material regeneration, multi-functional technology, applied in filter regeneration, separation methods, chemical instruments and methods, etc., to achieve the effect of good impact resistance and prolong service life

Active Publication Date: 2020-12-29
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the regeneration method of dust removal and denitrification multifunctional filter materials in China at present.

Method used

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  • A regeneration method for dust removal and denitrification multifunctional filter material
  • A regeneration method for dust removal and denitrification multifunctional filter material
  • A regeneration method for dust removal and denitrification multifunctional filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of cleaning solution

[0034] According to the mass ratio of 0.1:0.1:1, weigh the diffusing agent alkylphenol polyoxyethylene ether, ethanol and nitric acid with a molar concentration of 0.02mol / L, perform ultrasonic treatment for 30 minutes, mix them evenly, and prepare a cleaning solution.

[0035] 2. Preparation of regenerated catalytic membrane

[0036] ① Preparation of catalytic membrane blank

[0037] Step 1: Weigh 100g (10%) Mn-La-Ce-Nb-O x Composite oxide powder (Mn / La / Ce / Nb=1:0.1:0.1:0.1, the average particle size of catalyst powder is 0.1um), 870g (87%) tetrafluoroethylene powder, 10g (1%) polyethylene glycol Alcohol 400, 15g (1.5%) N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 5g (0.5%) oxidized polyethylene wax;

[0038] Step 2: Put the weighed powder into a stirrer for mixing and stirring, the stirring speed is 120 rpm, and the stirring time is 360 minutes. After taking it out, let it stand at 20°C for 48 hours to obtain the catalytic mem...

Embodiment 2

[0053] 1. Preparation of cleaning solution

[0054] According to the mass ratio of 0.5:0.3:1, weigh the diffusing agent alkylphenol polyoxyethylene ether, ethanol and nitric acid with a molar concentration of 0.15mol / L, perform ultrasonic treatment for 240min, mix them evenly, and prepare a cleaning solution.

[0055] 2. Preparation of regenerated catalytic membrane

[0056] ① Preparation of catalytic membrane blank

[0057] The first step: weigh 220g (22%) Mn-La-Ce-Nb-O x Composite oxide powder (Mn / La / Ce / Nb=1:0.2:0.25:0.25, the average particle size of catalyst powder is 0.2um), 655g (65.5%) tetrafluoroethylene powder, 30g (3%) polyethylene glycol Alcohol 600, 35g (3.5%) N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 60g (6%) isoparaffin solvent;

[0058] Step 2: Put the weighed powder into the mixer for mixing and stirring, the stirring speed is 500 rpm, and the stirring time is 180 minutes. After taking it out, let it stand at 35°C for 30 hours to obtain the catalytic me...

Embodiment 3

[0070] 1. Preparation of cleaning solution

[0071] Weigh the diffusing agent alkylphenol polyoxyethylene ether, ethanol and sulfuric acid with a molar concentration of 3mol / L according to the mass ratio of 1:1:1, and perform ultrasonic treatment for 360min to mix them evenly and prepare a cleaning solution.

[0072] 2. Preparation of regenerated catalytic membrane

[0073] ① Preparation of catalytic membrane blank

[0074] Step 1: Weigh 300g (30%) Mn-La-Ce-Nb-O x Composite oxide powder (Mn / La / Ce / Nb=1:0.3:1:0.5, the average particle size of catalyst powder is 0.5um), 500g (50%) tetrafluoroethylene powder, 50g (5%) polyethylene glycol Alcohol 800, 50g (5%) N-(β-aminoethyl)-γ-aminopropyl triethoxysilane, 100g (10%) isoparaffin solvent;

[0075] Step 2: Put the weighed powder into the mixer for mixing and stirring, the stirring speed is 800 rpm, and the stirring time is 120 minutes. After taking it out, let it stand at 60°C for 24 hours to obtain the catalytic membrane blank; ...

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Abstract

The invention provides a method for regenerating dedusting and denitrifying a multifunctional catalytic filter material. The method concretely comprises the following steps: (1) preparing a cleaning solution; (2) producing a regenerated catalyic filter membrane from polytetrafluoroethylene powder, catalyst powder, a pore forming agent, a coupling agent and a lubricant; (3) purging a poisoned or deactivated dusting and denitrifying multifunctional filter material, and washing the filter material with the prepared cleaning solution, and pretreating the filter material base cloth with a treatmentagent; and (4) performing hot press compounding on the prepared regenerated catalytic filter membrane and the pretreated filter base cloth by a hot press roller, and cooling the obtained material toobtain a regenerated dedusting and denitrifying multifunctional filter material. The method allows the regeneration of the dedusting and denitrifying multifunctional filter material to be fast completed by using an existing filter material preparation device only through matching with a simply used device, and makes the regenerated multifunctional filter material environmentally friendly and highly efficient (the denitrifying activity is more than 90%). The method has great significance to realize the industrialization and the promotion application of flue gas simultaneous dedusting and denitrifying filter bags.

Description

technical field [0001] The invention relates to the technical field of material processing and catalytic materials, in particular to a regeneration method for dust removal and denitrification multifunctional filter materials. Background technique [0002] More than 600 million people in our country will be seriously affected by smog every year. Dust and nitrogen oxides (NOx) are the main culprits of smog. my country's NOx and dust emissions are as high as 24 million tons / year and 15 million tons / year respectively. It is the world's largest emitter, and the annual loss is more than 300 billion yuan. The control of dust and NOx has become the core of my country's air pollution control. Urgent need. At present, most of the dust removal and denitrification (NOx removal) are operated independently at home and abroad. Dust removal adopts bag type, electric type, and electric-bag composite technology, among which bag type dust removal technology is the trend of future development ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/60B01J38/52B01J38/00B01D53/96B01D53/86B01D41/02B01D39/02B01D53/56
CPCB01D39/02B01D41/02B01D53/8628B01D53/96B01J38/00B01J38/52B01J38/60
Inventor 杨波黄琼徐磊磊蔡炜
Owner NANJING UNIV OF INFORMATION SCI & TECH
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