A sewage treatment device based on partial reflux pressure dissolved air flotation

Abstract

The invention discloses a sewage treatment device based on partial reflux pressure dissolved air flotation. It is characterized in that it includes water pump, sewage return pipe, flow meter, air compressor, ozone generator, dissolved air tank, decompression release valve, dissolved air releaser, air flotation reaction tank, slag scraping equipment, perforated water collection pipe, single Directional valve and sump. The water inlet of the water pump is connected to the sewage return pipe, the water outlet of the water pump is connected to the dissolved air tank; the air compressor is connected to the ozone generator, and the ozone generator is connected to the dissolved air tank; The dissolved air releaser is placed in the air flotation reaction tank, the slag scraping equipment is located above the air flotation reaction tank, the perforated water collection pipe is located in the air flotation reaction tank; the water collection tank is used to store air flotation reaction The pool is out of water. The beneficial effects of the invention are: while completing the dissolved air flotation treatment of waste water, the ozone can also be used to reduce the COD content in the waste water, effectively reducing the cost of the waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of pressure dissolved air flotation, in particular to a pressure dissolved air flotation device for treating high COD, domestic sewage containing light suspended matter and industrial waste water after primary treatment. Background technique [0002] Air flotation separation process has been widely used in water treatment. Especially in the field of wastewater treatment, the application of air flotation is wider. The air flotation method is a separation method for separating light substances such as oil, fiber and algae in water. It uses highly dispersed micro-bubbles formed in water to absorb suspended particles of wastewater to form flocs and float up. Because the air flotation method makes up for the shortcomings of the sedimentation method, it has obvious effects in the removal of light pollutants in various types of wastewater. [0003] The pressure dissolved air flotation method is to incorporate air...

AI Technical Summary

Problems solved by technology

[0004] In the traditional pressure dissolved air flotation, air is directly used as the air source. The only effect that air can achieve as the air source is to complete flocculation and solid-liquid separation in one operation unit, but for modern wastewater treatment, only this function is far from enough

At the same time, the filler in the dissolved air tank in the traditional pressure dissolved air flotation device is only ordinary filler, and the dissolved air water decompression release device also has the disadvantage of being easily blocked, and the water treated by it needs to be decolorized and smelled. , taste, disinfection and other processes, the operation process is complicated

Images