Slag discharge device and slag discharge method for sand basin

Abstract

The invention discloses a slag discharge device and a slag discharge method for a sand basin, wherein the slag discharge method for the sand basin is characterized in that: a truss type slag scraper is arranged in the sand basin, a slag scrapping plate is arranged on the lower of the truss type slag scraper, a slag discharge channel is arranged in the sand basin, an inclined slag scrapping slope is arranged between the slag discharge channel and the sand basin and is connected with a slag discharge pipe, the slag scrapping plate of the truss type slag scraper scraps scum on a liquid level over the slag scrapping slope, the slag water flows back to the sand basin, and the scum falls into a spiral conveying compressor of the slag discharge channel, and then is conveyed to the slag discharge pipe for discharging after compressed by the spiral conveying compressor. The slag discharge device and the slag discharge method of the invention are less susceptible to the effect of wind power and water level fluctuation, can avoiding scum silica frost accumulating in the slag discharge channel, has advantages of simple construction structure, convenience for construction, operation and management, and can be used for reconstructing a current slag discharging device.

Description

technical field [0001] The invention relates to the technical field of sewage treatment involved in municipal engineering and environmental protection engineering, in particular to a slag discharge device and a slag discharge method for grit chambers. Background technique [0002] At present, in our country's municipal engineering and environmental protection projects, the grit chamber involved in the sewage treatment project must design a slag discharge device to skim off the scum on the surface. [0003] The more common treatment method is: install a skimming pipe 2 at the operating liquid level at one end of the grit chamber 1. The skimming pipe adopts a circular tubular structure with both ends fixed. The skimming pipe can rotate around the center line of the pipe. One end of the skimming pipe is connected to the slag discharge pipe 3 outside the pool, and there is a launder along the length of the pipe. During operation, the skimming pipe is rotated manually or automati...

AI Technical Summary

Problems solved by technology

[0008] An object of the present invention is to provide a slag discharge device for grit chambers, which can overcome the disadvantages of the poor effect of the skimming pipe when it is affected by wind force, liquid level fluctuations, etc., and can reduce the moisture content of the slag to avoid to the follow-up pressing device, etc.

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