Papermaking sewage air flotation treatment equipment

Abstract

The invention relates to papermaking sewage air floatation treatment equipment, which comprises an air floatation tank provided with a separation area and a sludge area, wherein the upper portion of the air floatation tank is provided with a slag scraping device, the slag scraping device comprises two groups of chain transmission assemblies, a scraping plate assembly and a driving assembly, the driving assembly drives the chain transmission assemblies to operate, the scraping plate assembly comprises a scraping plate main body, the two sides of the scraping plate main body in the length direction are connected with the two groups of chain transmission assemblies correspondingly, connecting rods are arranged on the two sides of a scraping plate respectively, a slag scraping plate is arranged between the two connecting rods, the slag scraping plate is far away from the chain transmission assembly relative to the scraping plate body, rotating shafts are arranged on the two opposite sides of the slag scraping plate, the two rotating shafts are rotationally connected with the ends, far away from the scraping plate main body, of the connecting rods respectively, a magnet is arranged on the side, close to the scraping plate main body, of the slag scraping plate, the scraping plate main body is made of a ferromagnetic material, and a blocking piece is arranged at the upper portion of the air floatation tank and forces the slag scraping plate to turn over in the sludge area. According to the invention, scum attached to the slag scraping device can be prevented from repeatedly entering the air floatation tank, so that the slag scraping efficiency is improved.

Description

technical field [0001] The present application relates to the field of sewage treatment technology, in particular to an air flotation treatment equipment for papermaking sewage. Background technique [0002] The dissolved air flotation machine is a commonly used pretreatment equipment in sewage treatment. Its main principle is to use the tiny air bubbles generated by the dissolved air system to contact with the solid suspended matter and oil in the sewage, and bring impurities to the sewage under the action of the buoyancy of the air bubbles. On the water surface, it is scraped off by the slag scraping device to achieve the purpose of purifying the water quality. It is usually used in the pretreatment section of papermaking, plastic washing, petroleum, printing and dyeing, slaughtering, food, breeding and other industries, and it is also used in the deep purification section of effluent. [0003] During the working process of the slag scraping device, there will inevitably ...

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Problems solved by technology

[0003] During the working process of the slag scraping device, there will inevitably be more scum attached to the surface. When the scraper assembly leaves the separation area and enters the separation area again in a circular motion driven by the chain drive assembly, the slag scraper extends into the separation area again. Under the liquid level in the separation area, the scum attached to the scraper board will enter the water in the separation area again, thus affecting the efficiency of scraping

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