Sewage primary sedimentation treatment system

Abstract

The invention discloses a sewage primary settling treatment system. The system comprises a settling tank, a water distribution chamber arranged at the center of the settling tank, a water inlet pipe communicated with the water distribution chamber, a fairing covering outside the water distribution chamber, a water outlet formed in the water distribution chamber, a mud scraping part, a mud storage cavity positioned under the settling tank, a mud discharge pipe communicated with the mud storage cavity, a water collection tank positioned above the settling tank and a water outlet pipe connected with the water collection tank; the lower part of the fairing is opened, and the distance h1 from the opening in the lower part of the fairing to the bottom of the settling tank is less than the height h2 of sludge in the settling tank; and the distance h3 from the water outlet to the bottom of the settling tank is more than the height h2 of sludge in the settling tank. According to the sewage primary settling treatment system, the height h2 of sludge is controlled to be higher than the distance from the opening in the lower part of the fairing to the bottom of the settling tank, and sewage can enter water and a sludge layer sequentially; and due to double effect of filtering and net-capturing of the sludge layer, the sludge settling rate can be increased, the rate of effluent with water can be reduced, usage of coagulant can be reduced, and cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a sewage primary sedimentation treatment system. Background technique [0002] The existing sewage primary sedimentation treatment system has the following deficiencies in the actual operation process: a mixing tank needs to be installed for mixing sewage and coagulation agents, which takes up space; there is no requirement for the sludge interface in the tank, so that the sedimentation sludge is formed in the early stage The particles are small, and it is easy to get mud in the water. In order to reduce the phenomenon of mud in the water, it is necessary to increase the dosage of coagulants, resulting in an increase in treatment costs. [0003] And the sludge after sedimentation needs to be scraped by mud scraping parts, but the scraper in the existing mud scraping parts is usually in direct contact with the bottom surface of the sedimentation tank, the friction between the two...

AI Technical Summary

Problems solved by technology

[0002] The existing sewage primary sedimentation treatment system has the following deficiencies in the actual operation process: a mixing tank needs to be installed for mixing sewage and coagulation agents, which takes up space; there is no requirement for the sludge interface in the tank, so that the sedimentation sludge is formed in the early stage The particles are small, and it is easy to get mud in the water. In order to reduce the phenomenon of mud in the water, it is necessary to increase the dosage of coagulants, resulting in an increase in treatment costs.

[0003] And the sludge after sedimentation needs to be scraped by mud scraping parts, but the scraper in the existing mud scraping parts is usually in direct contact with the bottom surface of the sedimentation tank, the friction between the two is extremely large, and the scraping The mud plate is extremely worn and has a short service life

And because the frictional resistance is too large, the driving force for driving the mud scraper action is correspondingly increased, and the power consumption of the driving parts is large, resulting in a waste of power resources

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