Resource comprehensive utilization for salty mud

A technology of resource utilization and salt mud, applied in the field of comprehensive utilization of salt mud, can solve the problems of increasing production cost, environmental pollution, large output and so on.

Inactive Publication Date: 2016-09-07
CHINASALT JINTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Salt mud contains calcium carbonate, magnesium hydroxide, calcium sulfate, and sodium chloride. Due to the large output and complex composition, direct discharge will cause environmental pollution. How to comprehensively utilize it is a problem that plagues the industry.
At present, most domestic enterprises treat salt mud by landfilling it...

Method used

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  • Resource comprehensive utilization for salty mud

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] A method for resourceful comprehensive treatment of salt mud, which uses salt mud and industrial by-product hydrochloric acid as raw materials to prepare three types of products: calcium sulfate dihydrate, magnesium hydroxide, and calcium chloride dihydrate through reaction and separation

[0035] (1) One-time washing: the raw salt mud and water are mixed at a volume ratio of 1:2 for washing, washed once with water, and then vacuum drum dehydrated.

[0036] (2) Second washing: After the first washing and dehydration, the salt mud and ethanol are mixed at a volume ratio of 1:1 for the second washing, and the sub-water is washed once, and then the plate and frame filter is used to remove the ethanol, and the ethanol is further collected for reuse.

[0037] (3) Mixing of ingredients: Add the salt mud and water obtained in the previous step into the reactor at a volume ratio of 1:1 for ingredient mixing.

[0038] (4) Adsorption and impurity removal: add 3% macroporous adsor...

Embodiment approach 2

[0050] A comprehensive resource utilization method for salt mud, which uses salt mud and industrial by-product hydrochloric acid as raw materials to prepare three types of products: calcium sulfate dihydrate, magnesium hydroxide, and calcium chloride dihydrate through reaction and separation

[0051] (1) One-time washing: The raw salt mud and water are mixed at a volume ratio of 1:2.5 for washing, washed twice with water, and then vacuum drum dehydrated.

[0052] (2) Second washing: After the first washing and dehydration, the salt mud and ethanol are mixed at a volume ratio of 1:1.2 for the second washing, and the sub-water is washed once, and then the ethanol is removed by plate and frame pressure filtration, and the ethanol is further collected for reuse.

[0053] (3) Batch mixing: Add the salt mud and water obtained in the previous step into the reactor at a volume ratio of 1:1.1 for batch mixing.

[0054] (4) Adsorption and impurity removal: add diatomite accounting for 2...

Embodiment approach 3

[0066] A resource comprehensive utilization method of salt mud uses salt mud and industrial by-product hydrochloric acid as raw materials to prepare three types of products: calcium sulfate dihydrate, magnesium hydroxide and calcium chloride dihydrate through reaction and separation.

[0067] (1) One-time washing: the raw salt mud and water are mixed at a volume ratio of 1:3 for washing, washed once with water, and then vacuum drum dehydrated.

[0068] (2) Secondary washing: After the primary washing and dehydration, the salt mud and ethanol are mixed at a volume ratio of 1:1.5 for secondary washing, and the secondary water is washed twice, and then the ethanol is removed by plate and frame pressure filtration, and the ethanol is further collected for reuse.

[0069] (3) Batch mixing: Add the salt mud and water obtained in the previous step into the reactor at a volume ratio of 1:1.2 for batch mixing.

[0070] (4) Adsorption and impurity removal: add 2% macroporous adsorption ...

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Abstract

The invention relates to the technical field of salty mud utilization, in particular to a resource comprehensive utilization for salty mud. The salty mud and industrial by-product hydrochloric acid react and are separated to prepare calcium sulfate dihydrate, magnesium hydrate and calcium chloride dehydrate, solid waste is cyclically used to consume the salty mud well, and the product calcium chloride is widely used as a drying agent, a snow melting agent, a refrigerant, an antifreezing agent, coagulator and chemical raw materials. Separated calcium sulfate can be used for preparing a gypsum board and other building materials, and magnesium hydrate is good fire retardant for plastic and rubber products. Undoubtedly, comprehensive utilization of the salty mud and industrial by-product hydrochloric acid meets the policies and guidelines of energy conservation, emission reduction and environmental protection in China.

Description

technical field [0001] The invention relates to the technical field of salt mud utilization, in particular to a resource comprehensive utilization method of salt mud. Background technique [0002] The brine purification process is a key process for the salt industry to improve the purity of refined salt products, reduce the impurity content in salt, and improve the whiteness of salt products; it is an important process for improving the effective working time of salt enterprises, prolonging the service life of equipment, and reducing energy consumption It is one of the important measures to improve the comprehensive utilization rate of resources, which is beneficial to the production of salt chemical industry, and is one of the important ways to reduce the production cost in the salt industry. [0003] Salt mud is the process of removing Ca from brine in the production process of salt enterprises. 2+ , Mg 2+ Solid waste generated during pretreatment. Salt mud contains cal...

Claims

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Application Information

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IPC IPC(8): C01F11/46C01F5/22C01F11/24
CPCC01F11/46C01F5/22C01F11/24
Inventor 陈留平崔耀星冷翠婷郝剑波李伟戴秋霞
Owner CHINASALT JINTAN
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