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Material circulation system formed by waste carbide mud residue and alkali-chloride industry

A technology of chlor-alkali industry and circulation system, applied in the field of material circulation system, can solve problems such as large land, polluted environment, occupation, etc., and achieve the effect of improving deep processing ability, improving economic benefit and reducing production cost

Inactive Publication Date: 2009-06-17
南通宙亚电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The waste calcium carbide slag discharged from the polyvinyl chloride industry by the acetylene gas phase synthesis is generally buried or piled up after natural sedimentation or pressure filtration and dehydration. These treatment methods occupy a large amount of land and seriously pollute the environment.

Method used

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  • Material circulation system formed by waste carbide mud residue and alkali-chloride industry
  • Material circulation system formed by waste carbide mud residue and alkali-chloride industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 100kg of calcium carbide slag (calcium hydroxide content is 85%; dry material) and 300kg of water are injected into the preprocessor 5 with a stirring device and stirred to form a uniform emulsion, and naturally settle for 30s to form suspended calcium hydroxide emulsion Calcium hydroxide emulsion and hydrochloric acid are injected into the purifier 6 according to the quality of pure substance 1:0.8, and stirred for 10 minutes to make the substance completely react. After the reaction solution is filtered, calcium chloride filtrate and filter cake are formed; calcium chloride filtrate The sodium hydroxide generated by electrolysis is injected into the secondary reactor 7 according to the pure substance quality 1:0.6 and stirred to generate high-purity calcium hydroxide and relatively pure sodium chloride solution containing 93.28kg of solute, and the sodium chloride solution is refined by soda ash and hydrochloric acid Afterwards, it is sent to the electrolysis workshop ...

Embodiment 2

[0034] The process flow is as in Example 1, 100kg of calcium carbide slag (calcium hydroxide content is 85%; dry material) and 600kg of water, natural sedimentation for 50s, calcium hydroxide emulsion and hydrochloric acid according to the pure substance quality 1:1.2, stirred for 10 minutes , the calcium chloride filtrate and the sodium hydroxide that electrolysis generates are by pure substance quality 1:1.1, make comparatively pure sodium chloride solution containing solute 134.39kg, high-purity calcium hydroxide and chlorine gas pure substance quality 1:1.1, complete bleaching 87.44kg of fine powder finished product, filter cake is reacted with the hydrochloric acid solution of concentration 10%, both obtained 6kg of high-quality activated carbon products, made 52.98kg calcium chloride dihydrate.

Embodiment 3

[0036] The process flow is as in Example 1, 100kg of calcium carbide slag (calcium hydroxide content is 85%; dry material) and 200kg of water, natural sedimentation for 20s, calcium hydroxide emulsion and hydrochloric acid according to the pure substance quality 1:0.6, stirred for 10 minutes , the calcium chloride filtrate and the sodium hydroxide generated by electrolysis press the pure substance quality 1:0.4 to obtain a relatively pure sodium chloride solution containing 46.64kg of solute, high-purity calcium hydroxide and chlorine gas pure substance quality 1:0.4, and the bleaching process is completed. 16.87kg of fine powder finished product, filter cake reacts with the hydrochloric acid solution of concentration 10%, both obtains 6kg of high-quality activated carbon products, makes 10.22kg calcium chloride dihydrate.

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Abstract

The invention discloses a material circulating system formed by waste acetylene sludge and the chlor-alkali industry. The system comprises: pretreated waste acetylene sludge is reacted with hydrochloric acid, the reaction product is filtered to obtain a calcium chloride solution; the filtrate is reacted with sodium hydroxide generated by electrolysis of a chlor-alkali factory to generate high-purity calvital; the calvital is chloridized, centrifugated, dried and crushed to prepare bleaching powder; and filter cakes are reacted with the hydrochloric acid to generate active carbon. The calcium chloride generated in the reaction can be prepared into calcium chloride dihydrate and anhydrous calcium chloride; and sodium chloride after treatment can be taken as a raw material for electrolysis. The material circulating system effectively solves the problem of treating the waste acetylene sludge and raw material problem in the chlor-alkali industry, embodies recycling economy; and byproducts of the bleaching powder and the active carbon and calcium chloride dihydrate products improve deep processing capacity of an enterprise.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of industrial three wastes, in particular to a material circulation system formed by waste carbide slag and chlor-alkali industry. Background technique [0002] The waste calcium carbide slag discharged from the polyvinyl chloride industry by acetylene gas phase synthesis is currently generally buried or piled up after natural sedimentation or pressure filtration for dehydration. These treatment methods occupy a large amount of land and seriously pollute the environment. At the same time, the electrolysis of salt water in the chlor-alkali industry to produce sodium hydroxide and chlorine requires a large amount of salt water. If the solid waste from the acetylene gas-phase synthesis of polyvinyl chloride industry can be combined and utilized with the materials from the chlor-alkali industry, it will be a great opportunity for the inorganic chemical industry. It is a model of recy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C25B1/34
Inventor 王嘉兴
Owner 南通宙亚电子科技有限公司
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