Comprehensive utilization method for bittern

A brine and process technology, applied in the field of salt chemical industry, can solve the problems of waste of resources, pollution of the environment, unavailability of other components, etc.

Inactive Publication Date: 2010-04-07
DAZHOU HENGCHENG ENERGY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the existing brine development and utilization in China, some simple components or components with high added value are generally selectively extracted, and the unextracted components are discarded along with the discharge of old brine. In the process of extracting components, other components are lost or other components are not available, which not only causes a serious waste of resources, but also pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The deep marine potassium-rich brine is pressurized and sprayed from the upper part of the aeration tower, and the air enters from the lower part of the tower to release the H released from the brine. 2 S gas carried out, H carried out with the air 2 S enters the boiler's air intake system under negative pressure and is oxidized to SO in the high temperature zone of the furnace. 2 , to remove SO through the boiler tail gas desulfurization unit 2 ; Under stirring conditions, add the 10% emulsion made of calcium oxide water into the 2 Magnesium is precipitated in the brine of S and separated by filtration. The temperature of the solution during precipitation is 35° C., and the pH of the precipitation end point is 10.0; a sodium carbonate solution with a saturation of 70% is added to precipitate calcium in the brine in which magnesium has been removed, and the amount of sodium carbonate added is the same as The molar ratio of calcium is 1.2:1, the reaction temperature is...

Embodiment 2

[0047] The pressurized brine is sprayed from the upper part of the aeration tower, and the air enters from the lower part of the tower to release the H released from the brine 2 S gas is brought out. H carried out with the air 2 S enters the secondary air intake system of the boiler under negative pressure conditions, and is oxidized into SO in the high temperature zone of the furnace. 2 , to remove SO through the boiler tail gas desulfurization unit 2 ; Under stirring conditions, add the 20% emulsion made of calcium oxide water into the 2Magnesium is precipitated in the brine of S, the temperature of the solution during precipitation is 50°C, and the pH of the precipitation end point is 11.5; a sodium carbonate solution with a saturation of 90% is added to precipitate calcium in the brine that has been removed from magnesium, and the amount of sodium carbonate added is related to the mole of calcium. The ratio is 1.8:1, the reaction temperature is 50°C, filtered, washed an...

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PUM

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Abstract

The invention relates to a comprehensive utilization method for bittern, which belongs to the technical field of salt chemical engineering. The bittern is a liquid mineral product, and is rich in multiple elements such as potassium, sodium, lithium, boron, bromine, iodine and the like; and at present, in the prior domestic bittern development and utilization, some simple components or components with high additional value in the elements are extracted, and the un-extracted components are discharged along with old bittern to be abandoned so as to cause serious waste of resources and pollute the environment. Through reasonable combination of processes of removing H2S from the bittern, settling magnesium, settling calcium and preparing calcium carbonate, preparing potassium-sodium mixed saltthrough primary salt preparation and secondary salt preparation, extracting potassium chloride through flotation, extracting boron, iodine, bromine, rubidium and cesium through acidification, preparing rubidium chloride and cesium chloride, extracting lithium and the like, the method implements step-by-step ordered extraction of main components; the toil yield of several main components reaches over 95 percent; and the method has the advantages of mutually exclusive loss in component extraction, implementation of closed cycle of processes, no mother liquor discharge, simple process control, low cost, high yield, environmental protection and the like.

Description

(1) Technical field [0001] The invention relates to a brine utilization process, which belongs to the technical field of salt chemical industry. (2) Background technology [0002] Brine is a liquid mineral, rich in potassium, sodium, lithium, boron, bromine, iodine and other elements. At present, in the existing brine development and utilization in China, some simple components or components with high added value are generally selectively extracted, and the unextracted components are discarded with the discharge of old brine. The advanced process loses other components or makes other components unusable during the extraction process of components, which not only causes serious waste of resources, but also pollutes the environment. (3) Contents of the invention [0003] The object of the present invention is to provide a step-by-step and orderly extraction of the main components of brine, which is rich in potassium, sodium, lithium, boron, bromine, iodine and other liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01D3/08C01B35/10C01B7/14C01B7/09C01D17/00C01D15/08
Inventor 夏康明唐兵安普伟
Owner DAZHOU HENGCHENG ENERGY GROUP
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