Method for treating waste brine sludge of soda by hydrochloric acid

A salt mud and soda ash technology, applied in sludge treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve the problems of wasting transportation costs, unfavorable for environmental protection, etc., and achieve reduction of processing and treatment costs and improved production process Its equipment is simple and the effect of eliminating chemical pollution

Inactive Publication Date: 2010-09-08
汪晋强
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

This technology uses two different materials: hydrogen peroxide (H2O2) and sodasulfonite (NaHS03) which act together when producing lime or gypsum from these sources. By combining this reactions at specific stages during manufacturing processes, various forms of calciurnina may be produced that have special properties such as high strengths for use in construction applications like building panels without being harmful substances released by other components used therein. Additionally, the resulting calcium-based compounds could potentially serve as valuable resources for industrial purposes due their potential benefits on environmental concerns over disposal methods.

Problems solved by technology

This technical problem addressed in this patents relates to disposal or recycling excessive amounts of salts used during production processes such as making up water resources at large scales like Sodaspanic countries' basin. Existing methods involve mixing solid materials containing these metals along with other chemicals from different sources before being sent off for landfill purposes without effectively treating them afterwards.

Method used

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  • Method for treating waste brine sludge of soda by hydrochloric acid
  • Method for treating waste brine sludge of soda by hydrochloric acid
  • Method for treating waste brine sludge of soda by hydrochloric acid

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for treating soda ash waste salt mud with hydrochloric acid, the treatment process is:

[0033] Step A, send 600kg of soda ash waste salt mud containing 50% water and 30% magnesium hydroxide to the washing tank 101, wash off soluble chloride ion and sulfate ion impurities with water, and then adjust it into magnesium The mud emulsion is sent to the settling tank 102 after;

[0034] Step B: After the magnesium mud emulsion in the sedimentation tank is separated from the precipitated liquid and solid, the magnesium mud emulsion is sent to the batching tank to add water to make an emulsion, and then sent to the carbonization tower 103 for carbonization. In the carbonization tower, the mass ratio of pure substances is 1 : 1.32 feeds carbon dioxide and reacts;

[0035] Step C, the reaction product in the step B is centrifuged with a centrifuge-104, and the filtrate obtained is then filtered with a suction filter-105 to obtain clarified liquid magnesium bicarbonate;...

Embodiment 2

[0043] A method for treating soda ash waste salt mud with hydrochloric acid, the treatment process is:

[0044] 223.45kg magnesium carbonate product 111 will be prepared according to the method in embodiment 1 with the soda ash waste salt mud soda ash waste salt of 600kg water content 50% containing magnesium hydroxide 30%;

[0045] Step F, the filter cake obtained by suction filtration in step B is calculated as calcium carbonate, and hydrochloric acid is put into the purifier 112 according to the mass ratio of pure substance 1:0.73 to carry out the synthesis reaction, and after the reaction, suction filter with suction filter 3 113 to obtain White filter cake and clear liquid; filter cake is a very small amount of insoluble material that can be burned or buried.

[0046] Step E, put the filtrate obtained by suction filtration in the step F into the neutralizer 201, neutralize it with calcium hydroxide, the neutralizer calcium hydroxide and the filtrate are in a weight ratio ...

Embodiment 3

[0050] A method for treating soda ash waste salt mud with hydrochloric acid, the treatment process is:

[0051] 223.45kg magnesium carbonate product 111 will be prepared according to the method in embodiment 1 with the soda ash waste salt mud soda ash waste salt of 600kg water content 50% containing magnesium hydroxide 30%;

[0052] Step F, the filter cake obtained by suction filtration in step B is calculated as calcium carbonate, and hydrochloric acid is put into the purifier 112 according to the mass ratio of pure substance 1: 0.93 to carry out the synthesis reaction, and after the reaction, suction filter with suction filter 3 113 to obtain White filter cake and clear liquid; filter cake is a very small amount of insoluble material that can be burned or buried.

[0053] Step E, put the filtrate obtained by suction filtration in the step F into the neutralizer 201, neutralize with calcium hydroxide, the neutralizer calcium hydroxide and the filtrate are in a weight ratio of...

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Abstract

The invention belongs to the technical field of treatment and utilization of chemical 'three wastes', and particularly discloses a method for treating waste brine sludge of soda by hydrochloric acid. In the main technical scheme, hydrochloric acid is used for purifying precipitates of calcium carbonate and calcium sulfate left after production of light magnesium carbonate in a purification plant to remove insoluble impurities, mixed solution of calcium chloride and a small amount of sulfuric acid can be produced after reaction, and a small amount of calcium hydroxide is used for neutralizing the sulfuric acid so as to completely produce a calcium sulfate precipitate, and then a product can be obtained through separation; and the remaining pure calcium chloride solution and sulfuric acid react in a synthesis plant to produce calcium sulfate dihydrate and hydrochloric acid solution, and the hydrochloric acid returns to the purification plant, thereby forming a material circulating system. The invention not only can eliminate chemical pollution, but also can transform the waste brine sludge into the chemical product with certain economic value through simple production process and equipment. Particularly, due to the recycling, the invention greatly reduces the cost for processing and treatment.

Description

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Claims

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Application Information

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Owner 汪晋强
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