Sedimentation tank for treating high-concentration sandstone wastewater

Abstract

The invention discloses a sedimentation tank for treating high-concentration sandstone wastewater, and relates to a high-concentration sandstone wastewater treatment technology. The sedimentation tankcomprises a water inlet area, a primary sedimentation zone and a secondary sedimentation zone which are communicated with a water inlet pipe; the primary sedimentation zone comprises a sludge scraping and sucking machine, a sludge discharging pipe and a water collecting tank; the sludge scraping and sucking machine is positioned at the bottom of the primary sedimentation zone; the sludge discharge pipe is connected with the bottom of the primary sedimentation zone; the secondary sedimentation zone comprises a sludge scraper, inclined pipe filler and a water outlet tank; the water outlet tankis positioned at the top of the secondary sedimentation zone; the water outlet pipe is connected with the water outlet tank; the secondary sedimentation zone is communicated with the water inlet zone;and the water inlet zone is communicated with the primary sedimentation area through water distribution buffer holes. According to the invention, a two-stage sedimentation and two-stage sedimentationzone sludge backflow mode is adopted, so that the sedimentation time of the sedimentation tank is effectively reduced, the volume of the sedimentation tank is reduced, and the treatment effect of thesedimentation tank is improved.

Description

technical field [0001] The invention relates to high-concentration gravel wastewater treatment technology, more specifically, it is a settling tank for treating high-concentration gravel wastewater. Background technique [0002] In the construction of hydropower stations, the sand and gravel aggregates required for large-scale concrete are generally produced manually. In order to ensure the quality of concrete, it is a major issue to deal with soil impurities in sand and gravel during the processing of artificial sand and gravel aggregates. The stone powder content is controlled within the range stipulated in the specification, thereby generating a corresponding amount of high-suspended solids wastewater. During the construction period of the hydropower station, the main pollutants in the production wastewater of the gravel processing system are suspended solids. The mass concentration of SS in the wastewater is generally as high as 30,000-100,000mg / L, and some are even hig...

AI Technical Summary

Problems solved by technology

If the wastewater from the gravel processing system is directly discharged without any treatment, it will damage the ecological environment of the construction area, cause river siltation, raise the river bed, and affect the living environment of aquatic organisms.

[0003] At present, some sedimentation tanks adopt the common type of horizontal flow and inclined tube sedimentation tanks commonly used in water supply projects, and the design and operation are basically in accordance with the design and operation parameters of water supply projects. This simple treatment and simple application make the treatment facilities in practice. There are many problems in the operation. Most of the production wastewater treatment facilities of the sand and gravel processing system are not operating normally. bruised and disabled

Another part of the sedimentation tank adopts the commonly used radial flow sedimentation tank, which has achieved certain success in design and operation, and has many engineering cases, but the residence time of the sedimentation tank is relatively long. At the same time, the radial flow sedimentation tank is circular, accounting for The area is large, and it has certain limitations in areas where it cannot be used in areas with terrain restrictions such as mountains.

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