Equipment and method for preliminary filtration of solid impurities in sewage

Abstract

The invention relates to a device and method for preliminary filtration of solid impurities in sewage, belonging to the technical field of sewage treatment equipment. The equipment includes a liquid pool and a sedimentation tank connected to the liquid pool. A rotating shaft is installed above the liquid pool; a filter grid is installed on the rotating shaft. There is a rotating cylinder on the periphery of the rotating shaft; the side wall of the rotating cylinder is provided with annular holes along the circumferential direction of the rotating cylinder; there are filtering holes on the filter grid, and the side of the filter grid is provided with a guiding slope; the side of the liquid pool is provided with The scraping mechanism extending along the corresponding annular hole to the filter grid. The invention uses the scraping mechanism to squeeze the impurities adhered to the surface into agglomerates, push them to the vicinity of the discharge channel, and finally enter the sedimentation tank for precipitation, thereby realizing the systematic and efficient treatment of impurities and improving the water purification ability, especially It is suitable for textile, papermaking and other traditional sewage discharge industries with large water consumption, and can play an important role in saving water resources and promoting the recycling of water resources.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a preliminary filtration equipment and method for solid impurities in sewage. Background technique [0002] Industrial wastewater discharge has always been an important source of water pollution. With people's emphasis on environmental protection, many industrial and mining enterprises have adopted sewage and wastewater cleaning and filtration equipment to treat the water quality up to standard before discharging it. Among many industries, the papermaking and textile fields are the key areas of industrial wastewater discharge. Regarding the treatment of wastewater, take the papermaking industry as an example. At present, straw and wood pulp are mostly used as papermaking raw materials in my country's papermaking industry. It consists of pulping, pulp washing, bleaching, and papermaking processes; pulping in the paper industry includes alkaline pulping, chemical ...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problem that it is difficult to filter out solid impurities in sewage in the prior art, the present invention provides a preliminary filtration equipment and method for solid impurities in sewage, which first crushes solid impurities and then uses automatic stirring and compaction technology to filter them Preliminary concentration of impurities improves the effect of separating and accumulating impurities from the water body, and then removes impurities from the water body in a unified manner, improving the filtering effect and efficiency of impurities in the water body

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