Medium filter for reclaimed water treatment

Abstract

The invention relates to a medium filter for reclaimed water treatment in the field of urban sewage recycling. The medium filter comprises a filtering tank, a water inlet pipe, a water outlet pipe and a filtering medium, the filtering tank is provided with a pore plate upwards from the bottom by a certain distance, one end of the water inlet pipe extends into the filtering tank from the top of the filtering tank, and one end of the water outlet pipe is communicated with a drainage port formed in the bottom of the filtering tank and located below the pore plate; the water inlet pipe is provided with a filter water inlet; the water outlet pipe is provided with a filter water outlet; the filtering medium comprises an anthracite filtering layer, a quartz sand filtering layer and a gravel cushion layer, and the anthracite filtering layer, the quartz sand filtering layer and the gravel cushion layer are sequentially laid on the pore plate from top to bottom. Through the structural design of the tank body and the filtering layer, impurities such as colloids, BOD5 and COD in reclaimed water can be effectively removed, so that the water quality reaches the standards that suspended solids are less than 2mg / L, the turbidity is less than 2NTU and the reverse osmosis SDI is less than 4, and the requirements of water reclaiming devices such as back-end ultrafiltration, reverse osmosis and ion exchangers on the water quality of inlet water are met.

Description

technical field

[0001] The invention relates to the technical field of urban sewage recycling, in particular to a medium filter for reclaimed water treatment. Background technique

[0002] With the continuous development of social economy and the increase of population, while creating benefits, it also creates various pollutions. The shortage of water resources has become a limiting factor restricting the further development of our country. In order to achieve sustainable development, it is necessary to reuse urban sewage. is the key to achieving this goal. Sewage regeneration treatment refers to the process of discharging sewage into a certain water body or reusing it, and purifying it. Sewage regeneration treatment and reuse has been widely used in municipal, energy, petrochemical, construction, agriculture, urban landscape and other fields. Most of the domestic urban sewage treatment plant effluent implements the first-level A standard of the "Urban Sewage Treatment Plan...

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