Sand-water separation device of sewage pump station

Abstract

The invention discloses a sand-water separation device for a sewage pump station. The invention relates to the field of sand-water separation devices. The problem that in the prior art, a sand-water separation device is not ideal in separation effect is solved. Technical key points comprise that the sand-water separation device comprises a shell; an inner container with a precipitation function isarranged in the shell; an overflow pipe with an overflow function is arranged in the middle of the inner container; the overflow pipe penetrates through the shell and the inner container, a filter screen used for filtering gravel is arranged at an upper end opening of the inner container, a sand scraping block used for scraping off the gravel from the filter screen is arranged on the filter screen, the sand scraping block is arranged in the shell through a sand scraping block driving unit, and the sand scraping block driving unit drives the sand scraping block to reciprocate on the filter screen; a flow guide plate for guiding water falling from the filter screen to the inner wall of the inner container is also arranged in the inner container; gravel is separated twice in a filtering andprecipitating mode, so that water carried by the gravel is less, and the gravel separation effect is improved.

Description

technical field [0001] The invention relates to the field of sand-water separation devices, in particular to a sand-water separation device for sewage pumping stations. Background technique [0002] At present, in the sewage treatment process of the sewage plant, the solid particles in the sludge slurry need to be separated from the gravel during the sewage pretreatment. The sand-water separator in the sewage treatment is used for the separation of sand and water in the water intake process, reducing sand particles Impact on biochemical systems. [0003] Chinese Patent Publication No. "CN208599235U" discloses a two-stage sand-water separator, including a mixing tank, a settling bucket and a spiral sand-water separator. The top of the settling bucket is connected to the mixing tank, and the bottom of the settling bucket is separated from the spiral sand-water. One side of the mixing tank is provided with a slurry inlet pipe, and the top of the mixing tank is provided with an...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a sand-water separation device for a sewage pumping station in view of the above defects. The overflow pipe passes through the outer casing and the inner tank, and the upper port of the inner tank is provided with a filter screen for filtering sand and gravel, and a sand scraper block for scraping sand and gravel from the filter net is arranged on the filter screen, and the sand scraper block passes through the scraper The sand block driving unit is installed in the shell, and the sand scraping block driving unit drives the sand scraping block to reciprocate on the filter screen; there is also a deflector in the inner tank to divert the water falling from the filter screen to the inner wall of the inner tank to solve the problem of The problem of unsatisfactory separation effect of sand-water separation device in the prior art

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