A settling tank for a sewage plant

Abstract

The invention discloses a sedimentation tank used in a sewage plant, comprising a tank body, a water inlet pipe, a water distribution unit arranged in the tank body, a biological filler unit, a mud scraping device, a gas recovery device and a water outlet pipe; the mud scraping device It includes a mud scraping rod arranged on the bottom surface of the pool body, a driving rod fixedly connected with the mud scraping rod, a driving part for driving the driving rod to rotate, and a second driving part for driving the driving rod to move up and down ; The water distribution unit includes a central pipe, a plurality of water distribution pipes and nozzles arranged on the water distribution pipe; the biological packing unit includes a first packing assembly, the first packing assembly includes a fixed sleeve, and is distributed along the circumferential direction of the fixed sleeve A plurality of filler frames and biological fillers arranged on the filler frames. In the present invention, the sewage is in sufficient contact with the biological filler, and the biological filler has a good effect on the anaerobic digestion treatment of the sewage, reduces the amount of sludge deposition, does not need frequent mud scraping operations, is energy-saving and environmentally friendly, has less wear and tear on the mud scraping parts, and has a long service life.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sedimentation tank used in a sewage plant. Background technique [0002] With the continuous growth of the economic level, the total amount of sewage is also increasing. Therefore, the demand for sewage treatment is also increasing. In the process of sewage treatment, the treatment effect on sludge is poor, and often only the sludge is allowed to settle by itself. A large amount of sludge in the sewage is directly deposited at the bottom of the sedimentation tank, which requires frequent cleaning, which affects the efficiency of sewage treatment. , and the processing cost is expensive. In order to solve the above problems, some of the existing sedimentation tanks are provided with biological fillers in the tanks, and the organic matter in the sludge is oxidized and decomposed by the biological fillers to reduce the amount of sludge deposition, thereby red...

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Problems solved by technology

[0003] However, the filler in the sedimentation tank under this structure needs to be backwashed, and the sludge at the bottom of the tank needs to be scraped. Various components such as mud scraping parts, backwashing pipelines, and fillers will be installed in the sedimentation tank. The structure is complex and the cost High; and there are too many components, so it is often prone to failure, the maintenance rate is high, the maintenance cost is expensive, and the working process of water treatment is affected, and the work efficiency is low

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