Continuous mercury removal system for high-acidity chemical mercury-containing waste liquid and method thereof

Abstract

The invention discloses a continuous mercury removal system for high-acidity chemical mercury-containing waste liquid and a method thereof. The system comprises a waste liquid storage tank, a steam stripping reaction tower, a continuous vulcanization reaction device and an adsorption tank which are sequentially communicated, the method comprises a hydrogenolysis steam stripping process; a continuous vulcanization mercury removal process; and a step adsorption process which is characterized in that the mercury concentration in the waste liquid is finally treated to be lower than 0.03 mg / L. According to the scheme, three combined technologies such as hydrogenolysis steam stripping mercury removal, continuous vulcanization mercury removal and gradient adsorption mercury removal are adopted torealize efficient removal of elemental mercury and mercury sulfide in the high-acidity high-mercury-content chemical waste liquid respectively; acid liquor used in the reaction process is treated acid liquor, the cost is low, mercury in mercury sulfide sediment can be recycled after the mercury sulfide sediment is collected, mercury resource recycling is achieved, and the technical problems thatunder the high-acidity condition, valence mercury is converted into the mercury sulfide sediment, and redissolution is prevented can be effectively solved. The deep purification of the high-acidity acid liquor can be guaranteed, so that the acid liquor does not contain mercury, and comprehensive utilization of the acid liquor is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection, and in particular relates to a continuous mercury removal system and method for high-acidity chemical mercury-containing waste liquid. Background technique [0002] Mercury and its compounds have become priority control pollutants in China and the world due to their characteristics of biotoxicity, bioaccumulation, persistence, and long-distance transmission. my country is a major country in the production, use and discharge of mercury. The production and use of mercury account for about 60% of the global production and use, respectively. The production and use of mercury will cause the discharge of mercury-containing waste. Mercury and its compounds discharged into water bodies form various forms of mercury through physical, chemical and biological actions, and even transform into highly toxic methyl compounds. The Minamata disease that occurred in Japan...

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Problems solved by technology

[0033] The purpose of the present invention is to provide a continuous mercury removal system and method for high-acidity chemical mercury-containing waste liquid, so as to solve the problem of high-acidity mercury-containing acid liquid treatment and disposal in the prior art

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