Sewage pretreatment method and device

Abstract

The invention discloses a sewage pretreatment method and device. A settling assembly is arranged in a support frame; a water inlet pipe penetrates through the side top end of a settling tank; the bottom end of a dirt discharge port is connected with a dirt discharge pipe; a supporting column is slidably mounted in a rubber pipe; support springs are uniformly distributed on the bottom surface of the settling tank; a dosing assembly is mounted at the top of the settling tank; a water inlet assembly is connected to the top of the water inlet pipe; one side of the dirt discharge pipe is connectedwith a slag removal assembly; an arc-shaped filter screen is mounted in a semi-cylindrical barrel; and one end of a porous rotating pipe is connected with a return pipe. Ferromagnetic substances are removed through the water inlet assembly, so obstruction is avoided; and sewage settles after entering the settling tank, the settling assembly is matched with the dosing assembly to remove sediments,the settling assembly is extremely convenient to clean, and floating objects on the top surface of the arc-shaped filter screen are removed through the slag removal assembly, so that the primary treatment process of the sewage is completed, the cleaning is simple and convenient, the operation is easy, and the subsequent water treatment is convenient.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage pretreatment method and device. Background technique [0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment generally includes the following three-level treatment: the first-level treatment is mechanical treatment, and the second-level treatment is biological Treatment, tertiary treatment is the advanced treatment of sewage, and the degree of non-treatment is also different according to the needs. Filtration and precipitation are the first and most important treatment steps, which will directly affect the subsequent treatment effect. [0003] However, the sedimentation of the sewage treatment devices currently on the market tends to accumulate during sedimentation, which requires centralized treatment at every other end. The treatment operation is tedious and time-co...

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Problems solved by technology

[0004] The present invention provides a sewage pretreatment device, which can effectively solve the problem that when the sewage treatment device proposed in the above background technology is settling, the sediment is easy to accumulate, so that centralized treatment is required every other time, and the treatment operation is cumbersome and time-consuming. The problem of the efficiency of sewage treatment

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