Treatment method of distillation extraction waste liquid in fine chemical engineering production

Abstract

The invention discloses a treatment method of a distillation extraction waste liquid in fine chemical engineering production, which comprises the following steps: 1) microelectrolysis treatment: when scrap iron and carbon particles are immersed in acidic wastewater, uncountable micro primary cells can be formed in the wastewater due to the polarization potential difference between the iron and carbon, wherein the lower-potential iron becomes the anode, and the higher-potential carbon becomes the cathode; 2) advanced oxidation treatment: chemical oxidation is performed many times with hydrogen peroxide under the action of a circulating pump by using Fe<2+> as a catalyst; and 3) electric flotation treatment: the wastewater enters electric flotation equipment, the electric flotation equipment generates hydrogen by adopting a three-dimensional-like electrode subjected to special treatment and a cathode connected with the negative pole of a direct current power supply, and the bubbles take the suspended substance in the sewage onto the water surface to form a scum layer. The method integrates the microelectrolysis, chemical oxidation and electric flotation treatment, has the advantages of lower chemical consumption, simple after-treatment, small occupied area and high treatment capacity, and is convenient for management.

Description

technical field [0001] The invention relates to the technical field of sewage treatment methods, in particular to a treatment method for fine chemical production distillation extraction waste liquid. Background technique [0002] With the increasing material needs of the society and the development of industrial processing and manufacturing, various chemical industries, medical biology, high-end electronics and other products are accompanied by a large amount of waste water, many of which are toxic, harmful and refractory to human health. The physical and chemical methods for treating the above wastewater include chemical oxidation method, wet oxidation method, various catalytic oxidation methods, supercritical oxidation method, incineration method, etc. The biochemical methods for treating the above wastewater include anaerobic method, SBR method, special effect engineering bacteria degradation law etc. Among the many treatment methods, some methods have a longer reaction ...

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Problems solved by technology

Among the many treatment methods, some methods have longer reaction residence time, some methods have higher cost or higher operating temperature and pressure.

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