Physicochemical comprehensive treatment system for dangerous waste liquid
A comprehensive treatment, waste liquid technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve good treatment effect, avoid leakage and leakage, and reduce investment.
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[0021] Applying the present invention, the hydrofluoric acid waste liquid produced by a certain medical equipment company in Hangzhou is used as the processing object. The fluoride content of the waste liquid (calculated as F-) is 100g / L. The main pollutant is HF, which is strongly acidic and has a gray-green appearance.
[0022] The specific treatment conditions are as follows: the reaction agent is lime milk solution lime / water=27 / 100 (mass ratio), 1:1 hydrochloric acid solution, and the amount of each batch of waste liquid is 0.8m 3 , add lime emulsion 2.5 m 3 After stirring for 15 minutes, pass through hydrochloric acid solution 0.06 m 3 Adjust the pH value (can be adjusted to about pH = 7) to stir for 20 minutes. After the reaction, the viscous waste liquid enters the vertical centrifuge for centrifugal dehydration, the filter cake enters the sludge collection tank or goes to the hazardous waste landfill for safe landfill, and the filtrate enters the middle tank of was...
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