Cross flow air floating device with secondary filtration

Abstract

The invention discloses a cross flow air floating device with secondary filtration. The device comprises an air floating tank (8); the air floating tank (8) is partitioned into an air floating reaction chamber (9), a water collecting chamber (10) and a clean water chamber (11) through a partition plate arranged in the tank; the air floating reaction chamber (9) is connected with a water inlet (1)and a dissolved air water inlet (2); the water inlet (1) is connected with a feeding device; and the lower part of the water collecting chamber (10) is provided with a perforated water collecting pipe (3). The device is characterized in that: the lower part of the clean water chamber (11) is provided with a porous plate (12); a filter layer (7) is arranged on the porous plate (12); the water outlet end of the perforated water collecting pipe (3) passes through the partition plate from the lower part of the water collecting chamber (10), extends into the clean water chamber (11), then upwards passes through the filter layer (7) and extends to the upper part of the clean water chamber (11); the water inlet of a drain pipe (5) is positioned in the clean water chamber (11) and below the porous plate (12), and the water outlet of the drain pipe (5) is positioned outside the air floating tank (8); and a discharge orifice (14) with draining and backwashing functions is formed in the clean water chamber (11) and on the lower part of the porous plate (12). The device has a simple structure and good water quality.

Description

technical field [0001] The invention relates to water treatment equipment, in particular to a cross-flow air flotation device, in particular to a cross-flow air flotation device with secondary filtration. Background technique [0002] As we all know, air flotation water treatment equipment is commonly used in various water treatment processes, such as figure 1 As shown, it is ideal for water purification with a specific gravity of suspended solids around 1. [0003] The air flotation water treatment equipment mainly uses pressure water and pressure air to fully mix in the gas dissolving tank, and then suddenly depressurizes and releases, releasing countless tiny bubbles in the air flotation reaction chamber, which can be adsorbed on suspended solids or oil during the rising process Make it increase in volume and float up, and periodically remove it through the slag scraping device, and the rest of the relatively clean water is collected through the lower part of the water c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the suspended solids with a specific gravity slightly greater than 1 will achieve secondary settlement due to the rupture of the bubbles during the rising process of the bubbles in the existing cross-flow air flotation device, which will affect the quality of the effluent. cross-flow air flotation device

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