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Method for removing ammoniasoda process calcined soda waste residue chloride ion

A technology of ammonia-alkali method and chloride ion, which is applied in the direction of waste treatment, solid waste removal, adsorption water/sewage treatment, etc., can solve the problems of utilization restrictions in the building materials industry, achieve COD reduction, simple treatment method, and low cost Effect

Inactive Publication Date: 2010-07-21
SHANDONG HAIHUA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Soluble chloride (CaCl 2 , NaCl) salt content is high, that is, the chloride ion content is high, so that the industrial reuse of alkali slag, especially in the construction material industry, is greatly restricted

Method used

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  • Method for removing ammoniasoda process calcined soda waste residue chloride ion

Examples

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Embodiment 1

[0015] Embodiment 1 Get 300 grams of waste water discharged outside after the treatment of oil refining enterprises, put into a container with stirring, the waste water COD is 60mg / l, NH 3 -N is 14 mg / l, add 100 grams of ammonia-soda process soda ash waste residue into the container, stir at room temperature for 10-60 minutes, filter, and wash the filter cake with 300 grams of waste water. The measured filter cake chloride ion content (dry basis) is 0.51%, the COD of the washing water is 55mg / l, and the NH 3 -N is 13 mg / l.

Embodiment 2

[0016] Example 2 Get 300 grams of reclaimed water from a sewage treatment plant and put it into a container with stirring. The COD of the reclaimed water is 95 mg / l, and the NH 3 -N is 14 mg / l. Add 100 grams of ammonia-soda process soda ash waste residue into the container, stir at room temperature for 10-80 minutes, filter, and wash the filter cake with 300 grams of reclaimed water. The measured filter cake chloride ion content (dry basis) is 0.21%, the COD of the washing water is 65mg / l, and the NH 3 -N is 12 mg / l.

Embodiment 3

[0017] Example 3 Take 300 grams of printing and dyeing wastewater discharged from a printing and dyeing factory after treatment, and put it into a container with stirring. The COD of the middle water is 180 mg / l, and the NH 3 -N is 20 mg / l. Add 100 grams of soda ash waste residue from the ammonia-soda method into the container, stir at room temperature for 10-80 minutes, filter, and wash the filter cake with 300 grams of waste water. The measured filter cake chloride ion content (dry basis) is 0.28%, the COD of the washing water is 95mg / l, and the NH 3 -N is 15 mg / l.

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Abstract

The invention discloses a method for removing ammoniasoda process calcined soda waste residue chloride ion, which comprises the steps: mixing ammoniasoda process calcined soda waste residue and recycled water of a sewage treatment plant and / or industrial waste water containing a certain amount of organic matter, separating solid and liquid and then washing filter cakes, thus achieving the purpose of removing the ammoniasoda process calcined soda waste residue chloride ion. The method uses recycled water of the sewage treatment plant and / or industrial waste water as washing water, has the advantages of simple process, low cost and the like; the ammoniasoda process calcined soda waste residue without the chloride ion can be used for producing building materials such as cement and the like; and the washing water can be directly discharged into sea or discharged into a salt pond for solar salt, thus having both the environmental benefit and economic benefit.

Description

technical field [0001] The invention relates to a method for removing chlorine ions from waste residue of soda ash in an ammonia-soda process. Background technique [0002] A large amount of waste residue is often produced during the production of soda ash by the ammonia-soda method. According to statistics, an average of 300 kg of waste residue is produced for every ton of soda ash produced. The output of process soda ash is 8.18 million tons. More than 8 million tons of ammonia-soda soda ash production in China produced a total of more than 2 million tons of waste residue, and the ammonia-soda enterprises have not yet found an ideal way to utilize the alkali residue. With the gradual improvement of domestic environmental protection awareness and stricter environmental laws and regulations, the treatment methods of waste residues of many ammonia-alkali enterprises, such as direct discharge into rivers, deep sea discharge, desert islands, tidal flats, etc., will be restrict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C02F1/28
CPCY02W30/20
Inventor 郝在晨迟庆峰朱荣振何加海梁金龙潘玉强
Owner SHANDONG HAIHUA GRP CO LTD
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