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Sulfur-resistant water-resistant, dust removal, denitration and demercuration multifunctional filter material and preparation method thereof

A multi-functional, water-based dedusting technology, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems that hinder the development and application of denitrification and demercury catalysts, the particles are easy to block the catalyst pores, catalyst poisoning, etc., to achieve isolation deposition and Poisoning effect, excellent water resistance and sulfur poisoning performance, and the effect of prolonging the service life

Active Publication Date: 2018-09-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of this type of catalyst is honeycomb, and during use, particles can easily block the pores of the catalyst; in addition, the H in the flue gas 2 O and SO 2 It is also very easy to cause catalyst poisoning, which also hinders the further development and application of simultaneous denitration and demercuration catalysts

Method used

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  • Sulfur-resistant water-resistant, dust removal, denitration and demercuration multifunctional filter material and preparation method thereof
  • Sulfur-resistant water-resistant, dust removal, denitration and demercuration multifunctional filter material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] 1. Preparation of catalyst powder

[0034] ① According to the catalyst active components (Ti-Sn-Nb-Ce-O x ) composite oxide and catalytic promoter (Fe-La-Co-O x) The mass ratio of composite oxide is 1:0.2, the molar ratio of Ti / Sn / Nb / Ce element is 1:0.1:0.1:0.1, and the molar ratio of Fe / La / Co element is 1:0.1:0.1, respectively weigh titanium Butyl nitrate, cerium nitrate, tin tetrachloride, cobalt acetate, copper nitrate, iron nitrate, niobium oxalate, lanthanum nitrate. The first step is to mix butyl titanate with absolute ethanol to obtain liquid A, and mix glacial acetic acid, absolute ethanol, distilled water and other salts to obtain liquid B; the second step is to add B solution to uniformly stirred liquid A , magnetically stirred for 10 min, and then aged for 48 h.

[0035] ②Dry the aged solution at 60°C for 10 hours, then put it into a muffle furnace for calcination, the calcination temperature is 800 ℃, the calcination time is 2 hours, and the denitrificati...

Embodiment 2

[0060] 1. Preparation of catalyst powder

[0061] ① According to the catalyst active components (Ti-Sn-Nb-Ce-O x ) composite oxide and catalytic promoter (Fe-La-Co-O x ) The mass ratio of composite oxide is 1:0.2, the molar ratio of Ti / Sn / Nb / Ce element is 1:0.2:0.2:0.25, and the molar ratio of Fe / La / Co element is 1:0.25:0.25, respectively weigh titanium Butyl nitrate, cerium sulfate, tin tetrachloride, cobalt nitrate, copper nitrate, iron nitrate, niobium oxalate, lanthanum acetate. The first step is to mix butyl titanate with absolute ethanol to obtain liquid A, and mix glacial acetic acid, absolute ethanol, distilled water and other salts to obtain liquid B; the second step is to add B solution to uniformly stirred liquid A , magnetically stirred for 20 min, and then aged for 30 h.

[0062] ②Dry the aged solution at 75°C for 8 hours, then put it into a muffle furnace for calcination, the calcination temperature is 550 ℃, the calcination time is 4.5h, and the denitrificati...

Embodiment 3

[0078] 1. Preparation of catalyst powder

[0079] ① According to the catalyst active components (Ti-Sn-Nb-Ce-O x ) composite oxide and catalytic promoter (Fe-La-Co-O x) The mass ratio of composite oxide is 1:0.2, the molar ratio of Ti / Sn / Nb / Ce element is 1:1:1:1, and the molar ratio of Fe / La / Co element is 1:1:1, respectively weigh titanium Butyl nitrate, cerium sulfate, tin tetrachloride, cobalt nitrate, copper nitrate, iron nitrate, niobium oxalate, lanthanum acetate. The first step is to mix butyl titanate with absolute ethanol to obtain liquid A, and mix glacial acetic acid, absolute ethanol, distilled water and other salts to obtain liquid B; the second step is to add B solution to uniformly stirred liquid A , magnetically stirred for 30 min, and then aged for 24 h.

[0080] ②Dry the aged solution at 80°C for 2h, then put it into a muffle furnace for calcination, the calcination temperature is 350°C, the calcination time is 10h, and the denitrification and mercury remov...

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Abstract

The invention provides a sulfur-resistant water-resistant, dust removal, denitration and demercuration multifunctional filter material, which is prepared from filter material base cloth, a catalytic filter membrane and a water-resistant and sulfur-resistant composite functional membrane. The effect that dust, NOx and Hg<0> are also removed during the dust removal is achieved; the addition of denitration and demercuration equipment is not needed; the smoke gas treatment cost is greatly reduced; in the temperature region of 140 to 200 DEG C, the dust removal rate is greater than 99 percent; thedemercuration efficiency is greater than 80 percent; the denitration activity is greater than 90 percent. The multifunctional filter material has excellent stability and water-resistant sulfur poisoning-resistant performance; when mixed smoke gas passes through the multifunctional filter materials, dust particles in the smoke gas are firstly filtered away, and are then in contact with catalysts; the poisoning and abrasion effects of the smoke dust on the catalysts are relieved. In addition, through a hydrophobic and antiwear composite functional membrane at the outermost layer of the multifunctional filter material, the deposition and poisoning effects of H2O, SO2 and generated substances such as ammonium bisulfate on the catalysts can be effectively isolated.

Description

technical field [0001] The invention relates to the technical field of air pollution control and functional filter material, in particular to a sulfur-resistant, water-resistant, dust-removing, denitration-removing and mercury-removing multifunctional filter material and a preparation method thereof. Background technique [0002] Coal is the most important primary energy in my country, accounting for more than 70% of China's energy composition, and coal will still be the main energy for a long time to come. The main pollutants emitted by coal combustion include: sulfides, nitrogen oxides, organic pollutants, fly ash and harmful heavy metal elements. Among them, dust and nitrogen oxides (NOx) are the main culprits causing smog. x The emissions of dust and dust are as high as 24 million tons / year and 15 million tons / year respectively. In addition, elemental mercury (Hg 0 ) is volatile and difficult to dissolve into water. It is a relatively stable form in the atmospheric en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D46/00B01D53/56B01D53/64B01D39/16
CPCB01D39/1607B01D46/0001B01D46/0027B01D53/8625B01D53/8665
Inventor 杨波黄琼徐磊磊蔡炜
Owner NANJING UNIV OF INFORMATION SCI & TECH
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