Desilting and deoiling device

Abstract

The invention discloses a sand settling and deoiling device, which comprises a separation well, a bottom baffle is arranged inside the separation well, a separation area is above the bottom baffle, and a sand settling area is below the bottom baffle, and the separation area is provided with a separator, drainage Pipe and tangential water inlet pipe, the separator is located in the center of the separation zone, including inner and outer cylinders that are concentric and connected at the top, the bottom of the inner cylinder is connected with an inclined deflector, and the drain pipe communicates with the cavity between the inner cylinder and the outer cylinder And outside the separation well, the tangential water inlet pipe connects the external sewage and the cavity between the outer cylinder and the inner wall of the separation well, and the tangential water inlet pipe is tangent to the outer wall of the outer cylinder; the bottom baffle has the same cross-sectional size as the inner wall of the separation well, and is located in The position directly below the cylinder is provided with a grit chamber, and the grit chamber connects the separation area and the grit chamber. The invention can effectively reduce the silt content and oil concentration in the rainwater, and reduce the non-point source pollution discharged into urban water bodies.

Description

Technical field [0001] The invention relates to the field of sewage treatment, and in particular to a grit degreasing device. Background technique [0002] In recent years, the national economy has developed rapidly. However, due to natural, historical and cognitive reasons, the traditional development model of high input, high consumption, heavy pollution, and low output has not been shaken off for a long time, which has caused serious problems. Environmental pollution and ecological destruction, 70% of the rivers in each city are black and smelly water bodies. The black and odorous water bodies in the city not only bring extremely poor sensory experience to the masses, but are also prominent water environment problems that directly affect the masses’ production and life. [0003] On December 12, 2013, General Secretary Xi said at the Central Urbanization Work Conference: “When upgrading the urban drainage system, we must give priority to keeping the limited rainwater behind, and...

AI Technical Summary

Problems solved by technology

[0004] The existing ordinary grit chamber usually adopts the principle of planar flow grit chamber, which has the following disadvantages: low efficiency, difficult to clean and maintain, needs to be installed together with the finished storm water outlet, and cannot remove oil

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