Closed micro negative pressure air-floating separation device

Abstract

The invention discloses a closed micro negative pressure air-floating separation device which comprises a pool body, a tilting plate, a return pipe, a blow-off pipe, a first multiphase flow pump, a dissolved air tank, a water inlet pipe, an air-floating water outlet pipe, a dross collection tank, a return gas output pipe, a nitrogen input pipe, a water collecting tank and a second multiphase flowpump, wherein the blow-off pipe and the water inlet pipe are arranged on the lower part of the pool body; the dross collection tank is arranged on the upper part of the pool body; the blow-off pipe, the water inlet pipe and the dross collection tank are communicated with the pool body; the tilting plate is arranged in the pool body; one end of the return pipe is communicated with the end of the water inlet pipe on the lower part of the pool body, and the other end of the return pipe is communicated with the end of the water outlet on the lower part of the pool body by virtue of the first multiphase flow pump; the water collecting tank is communicated with the pool body by virtue of the air-floating water outlet pipe; the nitrogen outlet in the pool body is communicated with the dissolved air tank by virtue of the return gas output pipe and the second multiphase flow pump; and the dissolved air tank is communicated with the top of the pool body by virtue of the nitrogen input pipe. According to the closed micro negative pressure air-floating separation device disclosed by the invention, the solid-liquid separation efficiency is improved, and aims of performing continuous and stableair floating separation and enabling the effluent quality to stably reach the standard are achieved.

Description

technical field [0001] The invention belongs to the petrochemical, water treatment and other environmental protection industries and the technical field of solid-liquid separation, and specifically relates to a closed micro negative pressure air flotation separation device. Background technique [0002] The air flotation method first appeared in the mineral processing industry in 1905. In the field of water treatment, as early as 1920, C.L.PECK considered using the air flotation method to treat sewage, but it did not attract enough attention. Before the 1960s, due to the limitation of microbubble generation technology, the development of air flotation technology was relatively slow. Until the 1970s, with the development of microbubble generation technology and the emergence of partial reflux dissolved air method, the air flotation technology has developed rapidly. Especially in recent years, air flotation technology has been highly valued at home and abroad, and has been wi...

AI Technical Summary

Problems solved by technology

The traditional gravity sedimentation removal technology has a long operation time, is greatly affected by the fluctuation of water quality and quantity, and the effluent water quality is unstable. At present, it cannot meet the treatment requirements of oily sewage

Images