Deep backwashing filter and backwashing method

Abstract

The invention provides a deep backwashing filter and a backwashing method. The invention relates to the field of oilfield sewage treatment equipment. The deep backwashing filter comprises a tank bodyand a stirrer, a lower connecting pipe is arranged at the bottom of the end socket of the tank body and connected with a water outlet pipeline, a backwashing water inlet pipeline, a compressed air pipeline and a dosing pipeline in parallel through valves, and an upper connecting pipe is connected with a water inlet pipeline and a backwashing water outlet pipeline in parallel through valves. Polyaluminium chloride and colloidal particles in the sewage are used for purification, the stirrer is used for stirring, dispersing and mixing a quartz sand filter material layer, colloidal particles attached to the surface of the quartz sand filter material and a water body break the stability and form tiny floccules, under the impact and carrying effects of bubbles formed after the compressed air isdivided by a filter cap, the floccules and the quartz sand filter material layer are separated and ascend to flow out of the tank body, chemical agents and physical stirring act on the quartz sand filter material at the same time, the backwashing regeneration strength of the quartz sand filter material is improved, backwashing is more thorough, the service life of the quartz sand filter material is prolonged, and the quality of filtered water is improved.

Description

Technical field: [0001] The invention relates to the field of oilfield sewage treatment equipment, in particular to a deep backwash filter and a backwash method. Background technique: [0002] In the process of the third production polymer injection project, the sewage treatment of oilfield polymers has always been the object of research and solution. Due to the unstable water quality and high polymer content in the water, the traditional quartz sand filter backwash method is common. There are problems such as large amount of water for backwashing, uneven water distribution, incomplete backwashing, and hardening of the filter material. Invention content: [0003] In order to solve the above problems, the present invention provides a deep backwash filter and a backwash method. [0004] The technical scheme of the present invention is: a deep backwash filter, including a tank body and an agitator, the agitator is connected to the central cylinder on the upper part of the ta...

AI Technical Summary

Problems solved by technology

[0002] In the process of the third production polymer injection project, the sewage treatment of oilfield polymers has always been the object of research and solution. Due to the unstable water quality and high polymer content in the water, the traditional quartz sand filter backwash method is common. There are problems such as large amount of water for backwashing, uneven water distribution, incomplete backwashing, and hardening of the filter material.

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