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.

Inactive Publication Date: 2012-02-08
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the shortage of the current common single physical and chemical technology for treating hazardous waste liquid, and propose a low-cost, low-investment, harmless and reduced hazardous waste liquid comprehensive treatment device for high-concentration liquid hazardous waste

Method used

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  • Physicochemical comprehensive treatment system for dangerous waste liquid

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Embodiment

[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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PUM

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Abstract

The invention discloses a physicochemical comprehensive treatment system for a dangerous waste liquid. The system comprises a waste liquid storage tank, a paper tape filter, a quenching and tempering groove, four reagent grooves, three reaction vessels with stirrers, a tail gas absorption groove, a buffer tank, a water injection vacuum set, a centrifuge, a suction filtration groove, a membrane processor, a filter press, a filtrate collection pool, two waste liquid intermediate grooves, a sludge collection pool and a wastewater regulating pool. Each processing unit of the invention can be switched and combined flexibly so as to be adapted to various physicochemical comprehensive treatments of a dangerous waste liquid, such as acid-base neutralization, coagulation sedimentation, redox, desalination, solid-liquid separating and tail gas purifying treatment etc. Under the condition of satisfying the technical requirements of waste liquid treatment, the system of the invention can reduce repeated treatment facility construction and investment. Under the premise of ensuring a good treatment effect, the system provided in the invention reduces human consumption, material consumption and energy consumption, and reduces the treatment operation cost of per unit of waste amount. The escaping and leaking phenomena common in present waste liquid treatment processes can be avoided, and secondary pollution to the environment as well as damage to people can be eradicated.

Description

technical field [0001] The invention relates to a hazardous waste liquid physical-chemical treatment system, in particular to a centralized physical-chemical comprehensive treatment system for various types and high-concentration hazardous waste liquids of different properties. Background technique [0002] Hazardous waste liquid comes from complex sources and various types, which can usually be divided into waste acid (alkali), electroplating waste water (heavy metal), oily waste water (waste emulsion) and high-concentration organic waste liquid, etc. At present, single physical and chemical treatment technologies are mostly used at home and abroad, mainly through the use of corresponding chemical reaction methods or solvent extraction methods for hazardous wastes of different natures to convert hazardous wastes into non-hazardous wastes, single industrial hazardous wastes or chemical substances with similar properties. Waste is often treated in this way. The physical and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 吴伟祥石德智邓辉戴綦文邓小兵
Owner ZHEJIANG UNIV
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