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A kind of denitration agent and its preparation method and application

A denitrification agent and a technology for its application are applied in the field of alkali-activated activated carbon denitration agent and its preparation, which can solve the problems of long time of activated carbon, and achieve the effects of improving denitration efficiency, good economic benefits, and enhancing product market competitiveness.

Active Publication Date: 2021-11-23
MCC BAOSTEEL TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to reduce the preparation cost of activated carbon denitration agent and improve the denitrification performance of activated carbon, the present invention utilizes alkali solution excitation and microwave heating to prepare alkali excitation technology, which solves the problem that the existing high-temperature heating active excitation activated carbon takes a long time. The denitrification agent uses C and CO As a reducing agent, it can significantly improve the denitrification efficiency, and at the same time, the weak alkali environment can further improve the denitrification efficiency, reduce costs, and develop new flue gas denitrification agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) The activated carbon is impregnated in a sodium hydroxide solution with a concentration of 40wt%, the impregnation temperature is 20°C, and the impregnation time is 5h; then it is placed in a vacuum drying oven with a vacuum degree of -0.07MPa and a temperature of 60°C for 45min to obtain adsorption Activated carbon in alkaline solution; among them, the shape of activated carbon is Φ8mm╳12mm, and the bulk density is 0.57t / m 3 , the water content is 2.3wt%, and the mass ratio of activated carbon to sodium hydroxide solution is 40:50;

[0040] 2) Put the activated carbon adsorbed by the alkali solution into a microwave oven for microwave heating, wherein the microwave power is 600W, and the activation time is 15min, so as to obtain the alkali-excited activated carbon precursor;

[0041] 3) using a concentration of 3wt% hydrochloric acid solution to wash the alkali-activated activated carbon precursor to remove impurities in the alkali-activated activated carbon precurs...

Embodiment 2

[0043] 1) The activated carbon is impregnated in a potassium hydroxide solution with a concentration of 60wt%, and the immersion temperature is 25°C, and the immersion time is 3h; then it is placed in a vacuum drying oven with a vacuum degree of -0.06MPa and a temperature of 50°C for 60min to obtain the adsorbed alkali Solution activated carbon; among them, the shape of activated carbon is Φ9mm╳13mm, and the bulk density is 0.62t / m 3 , the water content is 2.1wt%, and the mass ratio of activated carbon to potassium hydroxide solution is 34:60;

[0044] 2) Put the activated carbon adsorbed by the alkali solution into a microwave oven for microwave heating, wherein the microwave power is 200W, and the activation time is 6min, so as to obtain the alkali-excited activated carbon precursor;

[0045] 3) washing the alkali-activated activated carbon precursor with a phosphoric acid solution with a concentration of 5 wt%, to remove impurities in the alkali-activated activated carbon p...

Embodiment 3

[0047] 1) The activated carbon is impregnated in a magnesium hydroxide solution with a concentration of 50wt%, the impregnation temperature is 22°C, and the impregnation time is 4h; then it is placed in a vacuum drying oven with a vacuum degree of -0.09MPa and a temperature of 70°C for 30min to obtain adsorption Activated carbon in alkaline solution; among them, the shape of activated carbon is Φ10mm╳15mm, and the bulk density is 0.60t / m 3 , the water content is 2.5wt%, and the mass ratio of activated carbon to magnesium hydroxide solution is 22:70;

[0048] 2) Put the activated carbon adsorbed by the alkali solution into a microwave oven for microwave heating, wherein the microwave power is 1000W, and the activation time is 3min, so as to obtain the alkali-excited activated carbon precursor;

[0049] 3) using a concentration of 6wt% sulfuric acid solution to wash the alkali-activated activated carbon precursor to remove impurities in the alkali-activated activated carbon precur...

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Abstract

The invention provides a denitration agent and its preparation method and application. The preparation method includes the following steps: 1) Activated carbon adsorbs alkali solution: soak activated carbon in alkali solution, and then dry to obtain activated carbon for adsorbing alkali solution; 2) Microwave Heating: Microwave heating the activated carbon adsorbed with alkali solution to obtain an alkali-activated activated carbon precursor; 3) Acid washing: Wash the alkali-activated activated carbon precursor with an acid solution, wash with water and dry to obtain the denitrification agent. The invention utilizes alkali solution excitation and microwave heating to prepare alkali-excited activated carbon, which solves the problem that the existing activated carbon activated by high-temperature heating takes a long time. Further improve denitrification efficiency, reduce costs, and develop new flue gas denitrification agents.

Description

technical field [0001] The invention relates to the technical field of sintering flue gas denitrification agents, in particular to an alkali-activated activated carbon denitrification agent prepared based on a microwave heating-alkali solution method and its preparation method and application. Background technique [0002] The development of flue gas denitrification technology is currently a key issue in the field of environmental pollution control. Due to the difficulty of NOx removal technology, it has become a difficult point in the research. [0003] At present, the traditional flue gas denitrification technology has the problems of large investment, high operating cost, and limited denitrification efficiency. The use of microwave heating to prepare activated carbon for denitrification has attracted widespread attention because of its high adsorption and strong reduction characteristics and the characteristics of uniform and rapid microwave heating, which has a high deni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02B01D53/81B01D53/56
CPCB01D53/02B01D53/56B01D53/81B01D2251/20B01D2251/204B01D2253/102B01D2257/404B01J20/20B01J20/28057B01J20/3071B01J20/3078B01J20/32
Inventor 顾恒星张浩陈华韩云龙
Owner MCC BAOSTEEL TECH SERVICE
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