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Medium-high temperature dechlorination agent for removing hcl gas and preparation method thereof

A dechlorination agent, medium and high temperature technology, applied in the field of flue gas purification and treatment, can solve the problems of limited temperature range and low chlorine capacity of the dechlorination agent, and achieve the effects of stable structure, high chlorine capacity and good adsorption activity

Active Publication Date: 2015-08-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: Aiming at the problem that currently existing dechlorination agents do not have a high chlorine capacity and are not suitable for a wide range of temperatures, and cannot achieve high-efficiency and deep removal of HCl gas in flue gas at medium and high temperatures, the present invention provides a deep Dechlorination agent for removing HCl gas and preparation method thereof, the dechlorination agent has high chlorine capacity in a wide temperature range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 75g glucose powder, 575g Ca(NO 3 ) 2 , 330g molecular sieve and 20g of methylcellulose; first glucose powder and Ca(NO 3 ) 2 Mix well, then add 3kg of 333K deionized water, then preheat the molecular sieve at 350K for 4h, then add glucose powder and Ca(NO 3 ) 2 The mixed solution was evenly dropped onto the preheated molecular sieve, and then mixed with methyl cellulose, and the obtained mixture was stirred at a rotation speed of 65 rpm, and dried at 353K to obtain a solid. The resulting solid was placed in a tube furnace with N 2 As a protective gas, heat up to 773K at 5K / min, stay for 30min, then take it out after cooling. The obtained solid is molded and granulated to obtain the desired dechlorination agent.

[0027] The prepared dechlorination agent is subjected to a dechlorination experiment, and the adsorbent reactor can be a moving bed, fixed bed or fluidized bed reactor, etc. The dechlorination reaction conditions are: the amount of flue gas introdu...

Embodiment 2

[0029] Take by weighing 74g glucose powder, 460g Ca(NO 3 ) 2 , 116g Mg(NO 3 ) 2 , 310g ZSM-5 and 40g of methylcellulose; first glucose powder and Ca(NO 3 ) 2 , Mg(NO 3 ) 2 Mix well, then add 4kg of 353K deionized water, then preheat ZSM-5 at 340K for 4h, then add glucose powder and Ca(NO 3 ) 2 , Mg(NO 3 ) 2 The mixed solution was evenly dropped onto the preheated ZSM-5, and then mixed with methyl cellulose, and the resulting mixture was dried at 353K at a stirring speed of 80 rpm to obtain a solid. The resulting solid was placed in a tube furnace with N 2 As a protective gas, heat up to 800K at 5K / min, stay for 30min, then take it out after cooling. The obtained solid is molded and granulated to obtain the desired dechlorination agent.

[0030] The prepared dechlorination agent is subjected to a dechlorination experiment, and the adsorbent reactor can be a moving bed, fixed bed or fluidized bed reactor, etc. The dechlorination reaction conditions are: the amount o...

Embodiment 3

[0032] Weigh 187g glucose powder, 563g NaHCO 3, 240g ZSM-5 and 10g of methylcellulose; glucose powder and NaHCO 3 Mix well, then add 4kg of 340K deionized water, then preheat ZSM-5 at 348K for 4h, then add glucose powder and NaHCO 3 The mixed solution was evenly dropped onto the preheated ZSM-5, and then mixed with methyl cellulose, and the obtained mixture was dried at 363K at a stirring speed of 80 rpm to obtain a solid. The resulting solid was placed in a tube furnace with N 2 As a protective gas, heat up to 800K at 5K / min, stay for 30min, then take it out after cooling. The obtained solid is molded and granulated to obtain the desired dechlorination agent.

[0033] The prepared dechlorination agent is subjected to a dechlorination experiment, and the adsorbent reactor can be a moving bed, fixed bed or fluidized bed reactor, etc. The dechlorination reaction conditions are: the amount of flue gas introduced is 40L / h, the amount of chlorine-containing gas is 100-3000ppm, ...

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PUM

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Abstract

The present invention provides a medium-high temperature dechlorination agent for removing hydrogen chloride gas and a method for making the same. The dechlorination agent is made of active ingredients, a carrier, an auxiliary agent and an adhesive. The active ingredient is obtained by fully mixing glucose with at least one selected from the group consisting of calcium nitrate, magnesium nitrate, zinc nitrate and sodium bicarbonate. The carrier and the auxiliary agents are ZSM-5 or a molecular sieve. The adhesive is methyl cellulose. The preparation method comprises: blending the active ingredients; adding the aqueous solution of the active ingredients into the pretreated carrier and auxiliary agent, in a dropwise manner; rotating; heating; drying; baking; forming; and granulating to obtain the dechlorination agent. The dechlorination agent can remove hydrogen chloride gas of exhaust gas effectively and deeply at a temperature of 423-1073 K, with a breakthrough chlorine capacity of 63% or more.

Description

technical field [0001] The invention relates to a dechlorination agent for deeply removing HCl gas under medium-high temperature conditions and a preparation method thereof, belonging to the technical field of flue gas purification treatment. Background technique [0002] At present, the output of urban domestic waste in my country has reached 160 million tons per year, and is still increasing at a rate of 8-10% per year, of which 66% can be treated in a harmless manner, and nearly 1 / 3 of the waste can only be simply landfilled , my country spends nearly 30 billion yuan a year on garbage removal and disposal. 600 cities across the country have piled up or buried 8 billion tons of various types of garbage, and the accumulation of garbage has encroached on 500 million square meters of land. Two-thirds of the cities are facing "garbage siege" . The problem of domestic waste disposal is very urgent, and incineration has been adopted by the United States, Japan, It is widely used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/68
Inventor 金保昇曹俊钟文琪王志飞王恺
Owner SOUTHEAST UNIV
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