Dissolved air flotation sewage processing device with self-cleaning function

Abstract

The invention discloses a dissolved air floatation sewage processing device with a self-cleaning function, and belongs to the technical field of industrial sewage processing devices. The provided sewage processing device comprises an underframe, a coagulation reaction area, a dissolved air pump, a gas / liquid separating tank, a contact reaction area, a scum separating area, a slag scraping device, and a clean water area, wherein the dissolved air pump, gas / liquid separating tank, contact reaction area, scum separating area, slag scraping device, and clean water area are arranged on the under frame and communicated with each other through corresponding parts. The sewage processing device is characterized in that the gas / liquid separating tank is connected to the scum separating area through a cleaning electromagnet valve and a cleaning releaser, the cleaning releaser is composed of releasing pipes, which are evenly arranged in the scum separating area, each releasing pipe is provided with a small hole, the cleaning releaser is connected to the gas / liquid separating tank through the cleaning electromagnet valve, and a perforated water collecting pipe is arranged above the cleaning releaser, and is connected to the clean water area through a clean water electromagnet valve. The provided dissolved air flotation sewage processing device can automatically remove settled scum left in an air flotation device by controlling the related electromagnetic valves and cleaning release through an automatic control technology so as to guarantee the water quality of discharged water, moreover, the structure is simple, thus the device is easy to promote, and a reliable sewage treatment method is provided for the small and micro enterprises.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment devices, in particular to a dissolved air flotation sewage treatment device with self-cleaning function. Background technique [0002] Dissolved air flotation technology is a traditional process technology for industrial sewage treatment. This technology is widely used in sewage treatment projects such as sewage decolorization, heavy metal ion removal, suspended solids removal and COD degradation. It is widely used in the sewage treatment industry due to a series of advantages such as relatively small footprint. However, due to the air flotation device, especially the advection air flotation device, the scum is always not scraped clean. For the intermittent operation of the air flotation device, the remaining scum on the water surface will be with the When the bubbles burst and sink to the bottom of the scum separation area, when the machine is turned on next time, the sinking...

AI Technical Summary

Problems solved by technology

[0004] Obviously, the aforementioned first method works better, but it increases the complexity and cost of the equipment; the second method only relatively prolongs the effective running time, but does not completely solve the problem; the third method is thorough but uncontrollable and does not Wasted water and increased operating costs

Images