Sand settling device for sewage

Abstract

The invention discloses a sand settling device for sewage. The device includes a fixed frame, a gravity diverter, a first sand settling tank, a first auger roller, a first motor, a second sand settling tank, a second auger roller, a second motor, a distribution box, a sludge pump, a cement pipe and a water suction pipe. According to the device, a straight pipe is in communication and sealed connection with the middle of a spiral pipe, the spiral pipe reduces the defluent velocity of the sewage and sand, so that settling of the sand in the spiral pipe is facilitated; the spiral pipe is connected with the straight pipe, when the sewage and the sand flow through the connection opening, the sand enters the straight pipe due to a large density and low speed, most of the sewage passes through the connection opening due to inertia and continues to stay in the spiral pipe, so that the separation efficiency of the sand and the sewage is improved; and most of the sand is collected in the first sand settling tank, the precipitated sand is discharged out of the sand settling tank through the first auger roller, and compared with a device for treating precipitated sand by using a traditional excavation method, the device provided by the invention is more convenient and simpler, saves trouble and effort, and has improved processing efficiency.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage sand settling device. Background technique [0002] my country is a country that lacks water resources per capita and is listed as one of the thirteen water-poor countries in the world. With the advancement of industrialization and urbanization in our country, the increasingly serious water pollution not only reduces the use function of water bodies, but further aggravates the contradiction of water shortage, which has a serious impact on China's ongoing sustainable development strategy, and also seriously It threatens the drinking water safety of urban residents and people's health, so the purification of sewage is the need for future development of people. [0003] Sewage treatment is a process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse. However, in the existing sewage treatment process, the grit s...

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Problems solved by technology

[0003] Sewage treatment is a process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse. However, in the existing sewage treatment process, the grit settling process is simple, and it is very difficult to wait for the sewage to stand still for grit settling. It takes a long time and the efficiency of sand settling is low. Using traditional excavation methods to deal with sand settling is very troublesome, time-consuming and labor-intensive, etc.

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