A sand filter tank structure of a non-ferrous metal mine acid wastewater treatment system

Abstract

The invention provides a sand filter tank structure for a non-ferrous metal mine acid wastewater treatment system. The sand filter tank structure comprises a cleaning water inlet pipe, a water separating cone, a bracket and a bracket positioning shaft, wherein a semi-spherical settlement water cover is arranged at the bottom of the tank body in a welding manner; a circular-table shaped top cover is locked and supported at the top end of the tank body by screws; a round cover plate is locked on and covers an opening formed in the top end of the top cover by screws; a sewage discharging pipe issuspended at the bottommost part of the settlement water cover in a communicating manner; a sewage discharging valve is fixed to the sewage discharging pipe by the screws; and a water inlet pipe is supported on the circumferential arc outer wall of the settlement water cover in a penetrating and communicating manner. According to the sand filter tank structure disclosed by the invention, through arrangement of six gas spraying pipes, when back-flushing cleaning is carried out, high-pressure airflow which is sprayed out of the six gas spraying pipes at high speed can form maser water flow to enable quartz sand to be dispersed and turned, and impurity sludge adhered and adsorbed on the surface is rubbed and stripped off, so that the back-flushing cleaning effect of a quartz sand filter material is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of sand filter tank facilities and mining equipment, and more specifically relates to a sand filter tank structure of a nonferrous metal mine acid wastewater treatment system. Background technique [0002] A sand filter is a mechanical filter used for turbidity removal of raw water. Send the raw water into the sand filter tank equipped with a filter layer, and use the dirt interception ability of the sand filter tank to effectively remove larger suspended particles and colloids in the water, so that the turbidity of the effluent is less than 1mg / l to ensure the follow-up normal operation of the process. The adsorption of sand filter tank is a kind of physical adsorption. When the sand filter tank affects its normal work due to excessive retention of impurities, it can be cleaned by backwashing. [0003] After retrieval, for example, the patent No. CN204502497U discloses a sand filter tank, including a cyl...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a sand filter tank structure of a non-ferrous metal mine acid wastewater treatment system to solve the problem that the filter materials of the existing sand filter tanks are piled up together and lack of tumbling and agitation, resulting in poor backwash cleaning effect of the filter material. Poor, and impurities and sludge are easy to deposit on the inner wall of the water collection tank at the bottom of the tank. There is no special spray cleaning facility, which causes impurities and sludge to accumulate at the bottom of the water collection tank and affect the overall cleanliness of water filtration.

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