System for discharging sludge at upper layer of floatation tank

Abstract

The invention relates to a slag discharge system for the upper layer of an air flotation tank, which includes a slag scraper and a mud layer diversion weir plate, and is characterized in that: one side of the slag scraper is provided with a roller that walks on the guide rail of the pool, and the slag scraper The other side of the car is fixedly connected with a bracket, the top of the bracket is fixedly connected with a rotating shaft, and a slag scraper is slidably connected to the rotating shaft. A steel wire is fixedly connected to the surface of the slag scraper, and the other end of the steel wire is keyed to the output shaft of the motor. Take-up reel connection. Beneficial effects: the mud scraper of the present invention will not bring mud residue back in the return path, and can pass through the diversion weir plate of the mud layer smoothly. The sludge scraper has a good scraping effect, so that the sludge floating in the air flotation tank can be discharged normally, avoiding the problem that the sludge accumulates and thickens, slowly sinks into the pool, and is brought into the outlet system with the water flow, affecting the quality of the outlet water occur.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a slag discharge system for upper mud slag in an air flotation tank. Background technique [0002] The slag discharge of the upper layer of the air flotation tank is mainly operated by the scraper of the slag scraper. see attached Figure 3-4 , the mud scraper 5 and the gravity hammer 8 are welded at an angle of about 90 degrees. When the mud scraper is scraping mud, the gravity hammer remains horizontal. The slag scraper is vertically downward due to the gravity of the gravity hammer, inserted into the water surface, and along the direction of the water flow Scrape the upper sludge of the air flotation tank to the weir plate, and discharge the sludge out of the air flotation tank. see attached Figure 4 , after the mud scraping operation is finished, the gravity hammer touches the bracket to be in a vertical state, and the slag scraper is in a horizontal state due t...

AI Technical Summary

Problems solved by technology

When the suspended particles of the sewage in the air flotation tank are brought to the water surface by the dissolved air water, the formed sludge layer contains flocculants and coagulants and other agents, which often stick to the slag scraper, making the weight of the slag scraper exceed gravity The weight of the hammer causes the slag scraper to move vertically downward on the way back, and the slag scraper will be inserted into the water surface again, bringing the surface sludge back to the air flotation tank, affecting the quality of the effluent

At the same time, the steel mud layer diversion weir plate of the existing air flotation tank is level with the wall of the air flotation tank, and there is no slope, so that part of the mud layer cannot be removed with the diversion weir plate, which affects the effluent water quality of the air flotation tank

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