Efficient Inclined Plate Oil Removal and Sand Settling Device

Abstract

The invention discloses an efficient inclined plate oil removal and sand settlement apparatus. The apparatus includes a pool body and a sand hopper positioned below the pool body; the lower side surface of one end of the pool body is provided with a water inlet tube, and the lower side surface of the other end of the pool body is provided with a water outlet tube; the bottom of the sand hopper is provided with a sand outlet tube; a position close to the water inlet tube end in the pool body is provided with a water distribution weir, the water distribution weir comprises a body and through holes uniformly distributed on the body; a position close to the water outlet end in the pool body is provided with a water outlet weir; and a plurality of inclined plates formed through serial connection of vortex street columns distributed according to an Achimedean spiral are arranged between the water distribution weir and the water outlet weir, the length direction of the vortex street columns is vertical to the direction of flowing of water into the inclined plates from the water distribution weir, and the length direction o a gap formed by adjacent inclined plates parallels to the direction of flowing of water into the inclined plates from the water distribution weir. The apparatus has the advantages of fast and efficient sand-water separation, stripping of organic matter from the sand grains, gravity flow of an oil-containing supernatant through a water outlet device, and regular discharge of water and oil removed sand grains falling into the sand hopper.

Description

technical field [0001] The invention relates to a high-efficiency (HRT≤10S) oblique plate deoiling and grit settling device for fast and efficient sand-water separation and organic matter (oil) stripping from the sand, and the oil-containing supernatant flows out through the gravity of the water outlet device to dehydrate and deoil the sand. The method for regularly discharging by falling into a sand bucket belongs to the technical field of sewage treatment. Background technique [0002] The commonly used forms of grit chambers for the primary treatment of sewage treatment plants are: advection grit chambers (including aerated advection grit chambers), Dorr grit chambers, and swirl grit chambers (bell type and Bi type with aeration and swirl flow) grit chamber), vertical flow grit chamber. The advection grit chamber and the advection aeration grit chamber have good grit effect, reliable operation and impact resistance; however, the hydraulic retention time is long and the l...

AI Technical Summary

Problems solved by technology

Dor grit chamber has remarkable grit effect, impact resistance, and reliable mechanical sand removal; but the structure is complicated, the construction and operation costs are high, the operation reliability is poor, and the sand particles adhere to oily dirt.

Cyclone grit chambers and aerated cyclone grit chambers have short hydraulic retention time HRT, high sand removal efficiency, but poor impact resistance; the sand density in the sand bucket is high and sand discharge is difficult, and high-pressure water pumps or air are often required to agitate. Air lift pumps often cannot effectively pump out sand; fibrous objects are entangled on the stirring paddle; the sand in the sand bucket is difficult to pump out due to compaction, and the tangential water inlet and the central water outlet are long, and the number of pools is more than two. When the water distribution is difficult, the land occupation is also large

The vertical flow grit chamber is suitable for the primary treatment of large sewage treatment plants, but the grit effect is poor and sand removal is difficult, so it is rarely used in projects

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