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Method for preparing fresh dechlorination agent from waste dechlorination agent

A technology of waste dechlorination agent and dechlorination agent, which is applied in separation methods, solid waste removal, combustible gas purification/reconstruction, etc., can solve the problems of high input cost and poor economic benefits, achieve high economic value and avoid waste. , the effect of environmental protection

Active Publication Date: 2019-02-26
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the secondary utilization of industrial solid waste, most of them use methods similar to the above-mentioned patents to prepare solid fuel for combustion and utilization, which has certain environmental benefits, but the input cost is high and the economic benefit is poor.

Method used

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  • Method for preparing fresh dechlorination agent from waste dechlorination agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weighing 100g waste dechlorination agent, this waste dechlorination agent is to be applied to the waste dechlorination agent of removing hydrogen chloride in the regeneration gas of catalytic reforming unit, its component is NaOH 20%, Ca(OH) 2 5%, NaCl 20%, and the rest is clay; after pulverizing the waste dechlorination agent, add 100ml of water, stir and filter, and dry the solid residue for later use; the filtered solution is passed through the polystyrene series strong basic anion Exchange resin bed, exchange with hydroxide ions and absorb chloride ions, evaporate part of the water in the lye, the moisture content in the lye is 53%, add solid slag and 15g methyl cellulose, knead evenly on the kneader, knead The finished material is extruded on the extruder, dried and roasted to obtain the regenerated fresh dechlorination agent. The roasting temperature is 400°C and the roasting time is 10 hours.

[0023] The present embodiment obtains the fresh dechlorinatio...

Embodiment 2

[0026] Take by weighing 80g waste dechlorination agent, this waste dechlorination agent is to be applied to the waste dechlorination agent that removes hydrogen chloride in the regeneration gas of catalytic reforming unit, and its component is Na 2 O 20%, CaO 10%, NaCl 10%, and the rest is clay; after crushing the waste dechlorination agent, add 120ml of water, stir and filter, and dry the solid residue for later use; the filtered solution is passed through a polystyrene system Strongly basic anion exchange resin bed, after hydroxide ion exchange and adsorption of chloride ions, after evaporation of part of the water in the lye, the water content in the lye is 50%, and solid slag is mixed into the lye treated above, 20g Hydroxymethyl cellulose is kneaded evenly on a kneader, and the kneaded material is extruded on an extruder to form a regenerated fresh dechlorination agent after drying and roasting. The roasting temperature is 600 ° C and the roasting time is 10 hours.

[002...

Embodiment 3

[0030] Take by weighing 150g waste dechlorination agent, this waste dechlorination agent is to be applied to the waste dechlorination agent that removes hydrogen chloride in the regeneration gas of catalytic reforming unit, and its component is Na 2 CO 3 20%, Ca(OH) 2 25%, NaCl 10%, CaCl 2 10%, the rest is clay; after the waste dechlorination agent is pulverized, add 200ml of water, after stirring and settling for filtration, dry the solid residue for use; After hydroxide ion exchange and adsorption of chloride ions, after lye lye evaporated part of the water, the moisture content in lye lye was 48% at this moment, add solid residue, 20g hydroxymethyl cellulose, knead evenly on the kneader, kneaded The material is extruded on an extruder, dried and roasted to obtain a regenerated fresh dechlorination agent. The roasting temperature is 600°C and the roasting time is 10 hours.

[0031] The present embodiment obtains the fresh dechlorination agent of regeneration, has the foll...

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Abstract

The invention discloses a method for preparing a fresh dechlorination agent from a waste dechlorination agent. The method comprises the following concrete steps: (1) pulverizing the waste dechlorination agent and adding the crushed waste dechlorination agent into water, carrying out sufficient stirring, then performing filtering to obtain a filtrate and solid residues, and drying the solid residues to obtain dried solid residues; (2) allowing the filtrate obtained in the step (1) to pass through polystyrene-series or acrylic-acid-series strong-basicity anion exchange resin, and exchanging andadsorbing chloride ions via hydroxyl radical ions by using an anion exchange method so as to obtain alkali liquid I; (3) adjusting the water content of the alkali liquid I to allow the mass percentageof the water content in the alkali liquid to be 10 to 30% so as to obtain alkali liquid II; and (4) mixing the dried solid residues with the alkali liquid II obtained in the step (3), adding a binder, and performing kneading, strip-extruding, drying and roasting so as to obtain the fresh dechlorination agent. The method of the invention recycles the waste dechlorination agent, avoids the wastingof resources and is beneficial for environmental protection. The fresh dechlorination agent prepared by using the method of the invention reaches the level of dechlorination agents in the prior art, and has high economic value.

Description

technical field [0001] The invention relates to a method for dechlorination and regeneration of waste dechlorination agents in industrial solid waste, in particular to a method for dechlorination and regeneration of waste dechlorination agents mainly containing Na, K, Ca and Mg basic metal oxides or hydroxides. Background technique [0002] Chlorine and chlorides widely exist in nature. Chlorine and chlorides are more or less present in process water, air, and raw materials. They poison the catalysts of ammonia plants and hydrogen production units in various ways. The dechlorination agent can be used in the fine dechlorination of synthetic ammonia, methanol, alcohol, methanation and other production processes, and can also be used in gaseous hydrocarbons, hydrogen, hydrogen nitrogen, semi-water gas, coke oven gas, decarbonization gas and other gases The essence of chlorine is removed and has a wide range of applications. The waste dechlorination agent after use is often tre...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00B01J20/34
CPCB01J20/34B09B3/00B09B5/00
Inventor 卞伯同王继元堵文斌杨爱武柏基业刘建新朱庆奋庞焱
Owner SINOPEC YANGZI PETROCHEM
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