A multi-stage ozone flotation process slag discharge device based on siphon principle

Abstract

The invention relates to a multi-stage ozone flotation process slag discharge device based on the principle of siphon, wherein the ozone flotation device used to realize the ozone flotation process includes a shell, and an inner column, an ozone flotation area and an ozone flotation area are arranged in the shell. Oxidation zone, slag discharge device The device includes a slag collection tank installed in the shell, and a slag scraper is set above the ozone air flotation area to scrape the scum above the ozone air flotation area into the slag collection tank, and the slag collection tank passes through the siphon Connect the water seal overflow water tank outside the shell, the siphon pipe is inverted U-shaped, and the siphon auxiliary device is connected to it. When the scum in the tank reaches a certain position, the siphon is turned on, and the scum in the tank is discharged to the water-sealed overflow water tank. When the scum liquid level in the tank drops, the siphon stops operating; The turbulent flow in the ozone flotation area caused by the negative pressure, the scum causes secondary pollution to the water body and the self-damage of the slag discharge water is too large, and the automation degree of the system is improved and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage advanced treatment, relates to a sewage advanced treatment device, in particular to a multi-stage ozone gas flotation process slag discharge device based on the principle of siphon. Background technique [0002] With the shortage of water resources and the continuous improvement of water treatment technology, the sewage discharge standards are becoming more and more stringent, and the water treatment has to be further processed. [0003] As a high-efficiency removal of chroma and advanced treatment of organic sewage, ozone air flotation is not only used in urban sewage, but also used more and more in printing and dyeing, petroleum, and pharmaceutical industries. The ozone air flotation process uses ozone to replace the air in the traditional air flotation process as the gas source for generating micro-bubbles. The ozone micro-bubbles can take away the suspended pollutants in the sewage. The pollut...

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Problems solved by technology

[0004] Most of the scum produced by the existing multi-stage ozone flotation is directly discharged to the scum collection tank through the overflow port on the top of the ozone flotation shell through the slag discharge pipe, but directly discharged through the slag discharge pipe will face three problems. Problems, 1. When the sludge is not discharged smoothly, sludge will accumulate inside the slag discharge. After a long time, it will lead to pipeline blockage, which will not only affect the slag discharge efficiency, but also increase the pipeline loss; The internal pressure of the ozone gas flotation area is greater than the pressure of the slag discharge outlet. It is necessary to manually observe the amount of slag discharge and the concentration of the discharged sludge, and then close the slag discharge valve or water inlet valve to allow air to enter the ozone gas flotation area. The external pressure is the same, otherwise the treated wastewater will also flow out of the slag discharge pipe due to the pressure difference, resulting in increased water loss

3. The degree of automation of the system is low, and the human consumption is large

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