Large-scale chemical industry wastewater treatment device and method

Abstract

The invention discloses a large-scale chemical industry wastewater treatment device, which comprises a denitrification device, an aerobic tank, a sedimentation tank, a liquid treatment tank and a sludge treatment device which are sequentially communicated; the sludge treatment device comprises a first-stage sludge treatment unit and a second-stage sludge treatment unit, wherein the first-stage sludge treatment unit comprises a first shell, wherein the upper side wall of the first shell is provided with a sludge inlet, the top of the first shell is of an arc-shaped structure, and a plurality ofhard brush strips are arranged at intervals at the top of the first shell; a first filter plate, wherein the structure of the first filter plate, in an arc-shaped strip structure, is arranged at themiddle part of the first shell, one end of the first filter plate is connected with the side wall of the first shell, the other end of the first filter plate is fixedly connected with a vertical plate, a second plate body is vertically fixed in the first shell so as to divide the lower part of the first shell into a liquid storage space and a sludge discharge space which are mutually independent,wherein the sludge discharge space is communicated with the upper space of the first shell, and the liquid storage space is communicated with the upper space of the first shell through filter holes ofthe first filter plate. According to the invention, the sludge is effectively dewatered while the sewage is treated.

Description

technical field [0001] The invention relates to the field of sewage treatment devices. More specifically, the present invention relates to a large-scale chemical sewage treatment device and method. Background technique [0002] The wastewater discharged by chemical enterprises in chemical parks has complex water quality, high ammonia nitrogen, high salinity, and high content of toxic substances. It is a typical organic, toxic, harmful and refractory industrial wastewater. The wastewater discharged by chemical enterprises in the chemical industry park must be pretreated in the factory and then discharged to the sewage treatment plant in the chemical industry park for centralized treatment after reaching the takeover standard. In the process of sewage treatment, a large amount of sludge will be discharged, and its water content is as high as more than 97%, which is perishable. Chemical industry parks need special sludge storage points for storage, and then process them in ba...

AI Technical Summary

Problems solved by technology

Chemical industry parks need special sludge storage points for storage, and then process them in batches. Due to the high water content of sludge, it takes up a lot of space for storage. In summer, high temperature and high water content lead to sludge breeding bacteria. The rate is significantly increased, and the sludge is more prone to rotting problems

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