Method for treating hydrofluoric-acid-containing waste water from factory

A waste water treatment, hydrofluoric acid technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as environmental pollution, high energy consumption, difficult maintenance, etc., to achieve Does not pollute the environment, consumes less energy, and does not pollute the air

Active Publication Date: 2014-03-26
YUNNAN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The roasting method has disadvantages such as large investment, high energy consumption, difficult maintenance, air and environmental pollution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pour the oily and alkali-containing hydrofluoric acid wastewater from the factory into the waste acid barrel for storage. The acid and alkali are neutralized by themselves, and then pumped into the degreaser through an acid-resistant pump to separate the water and oil. The spent oil is recovered by the collector, containing hydrogen and fluorine The acid wastewater enters the comprehensive adjustment tank and adds lime milk to adjust the pH to pH = 8. The amount of lime milk is determined according to the concentration of the shabby wastewater. Calcium chloride and fluoride ions in the lime milk are used to react to form calcium fluoride, which is then pumped into the reaction tank to add Calcium chloride 30% concentration preparation, make it react with fluoride ions again to form calcium fluoride, add 30% concentration polyaluminum chloride preparation at the same time when the wastewater flows into the coagulation tank, make it flocculate to form alum flowers, enter th...

Embodiment 2

[0018] Pour the oily and alkali-containing hydrofluoric acid wastewater from the factory into the waste acid barrel for storage. The acid and alkali are neutralized by themselves, and then pumped into the degreaser through an acid-resistant pump to separate the water and oil. The spent oil is recovered by the collector, containing hydrogen and fluorine The acid wastewater enters the comprehensive adjustment tank and adds lime milk to adjust the pH to pH = 9. The amount of lime milk is determined according to the concentration of shabby wastewater. Calcium chloride and fluoride ions in the lime milk are used to react to generate calcium fluoride, which is pumped into the reaction tank again to add Calcium chloride 40% concentration preparation, make it react with fluoride ion again to form calcium fluoride, add 20% concentration polyaluminum chloride preparation at the same time when the wastewater flows into the coagulation tank, make it flocculate to form alum flowers, enter th...

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PUM

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Abstract

The invention relates to a method for treating hydrofluoric-acid-containing waste water from a factory. The process flow comprises the following steps: feeding hydrofluoric-acid-containing waste water into an acid storage barrel, regulating with alkali/oil-containing waste water, performing oil-water separation, performing comprehensive waste water regulation, regulating the pH value, performing chemical reaction, coagulating, flocculating, precipitating, filtering, collecting through fluoride ion adsorption, performing resin exchange, regulating the pH value, and performing up-to-standard discharge. The method provided by the invention has the remarkable advantages of low cost, low energy consumption, easy maintenance, no air pollution and no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment, especially a method for treating waste water containing hydrofluoric acid in factories. Background technique [0002] The factory usually adopts roasting method for the treatment of waste acid. The roasting method has disadvantages such as large investment, high energy consumption, difficult maintenance, air and environmental pollution. Contents of the invention [0003] The purpose of the present invention is just to provide a kind of factory hydrofluoric acid wastewater treatment method with low cost, low energy consumption, easy maintenance, no air pollution and environment in order to overcome the defect that the above-mentioned prior art exists. [0004] The purpose of the present invention is achieved through the following technical solutions. [0005] A kind of factory hydrofluoric acid wastewater treatment method, the feature of the present invention is, tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 徐宁李继浏
Owner YUNNAN TITANIUM IND
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