A method for separating and purifying desulfurized gypsum and a device for realizing the method

A technology of desulfurization gypsum and desulfurization slurry, applied in the direction of solid separation, chemical instruments and methods, calcium/strontium/barium sulfate, etc., can solve the problems of poor dehydration effect of desulfurization gypsum, low grade of desulfurization gypsum, and improve resource utilization , Improve the grade and improve the effect of purity
CN106315652BInactive Publication Date: 2017-09-29CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINESE RES ACAD OF ENVIRONMENTAL SCI
Publication Date
2017-09-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a separation and purification method of desulfurized gypsum and the implementation thereof to upgrade the quality of the desulfurized gypsum. The method is to add alcoholic foaming agent and hydrophobic collector into the desulfurized gypsum slurry in the stirring condition. The equipment for the implementation comprises the collector injection unit and the foaming agent injection unit. The outlet of the collector injection unit is connected to the desulfurized slurry pond; the outlet of the foaming agent injection unit is connected to the oxidized air transmission pipe. The invention applies the principle of dissolved air floating, combines the black gel debris and hydrophobic collector, and combines the hydrophobic base of the foam generated by the foaming agent and the hydrophobic base on the surface of the black gel debris, wherein the bubble takes the black debris to the liquid top layer to make the black debris detached from the desulfurized gypsum slurry. The removal rate of the black gel debris is higher than 90%, which guarantees the dehydration effects of the desulfurized gypsum slurry and enhances the purity and whiteness of the desulfurized gypsum and improves the quality of the desulfurized gypsum.
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Description

technical field

[0001] The invention relates to the technical field of separation and purification of flue gas desulfurization gypsum, in particular to a method for separation and purification of desulfurization gypsum and a device for realizing the method. Background technique

[0002] my country produces about 15 million tons of white mud for papermaking every year, and about 30 million tons of power plant slag every year. In addition, the chlor-alkali and caustic soda industries also produce more than 400,000 tons of salt mud every year. The main component of these solid wastes is calcium carbonate, and most of them are disposed of in landfills. Calcium-based solid wastes such as lime mud contain soluble salts, causing serious secondary pollution to soil and groundwater, posing a serious threat to the ecological environment, and becoming a difficult point in industrial solid waste control.

[0003] At present, the application methods of calcium-based solid waste at home ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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