Papermaking sewage deep biochemical treatment system

Abstract

The invention relates to the field of sewage treatment, in particular to a papermaking sewage deep biochemical treatment system, which comprises a storage mechanism, a sewage discharge mechanism, a shower head, a protection mechanism, an anti-blocking mechanism, a material receiving mechanism and a blocking mechanism. When sewage moves downwards in the storage mechanism, impurities in the sewage are remained in the quartz sand; the impurities gradually block the upper layer of the quartz sand, so that the water level of the water in the storage mechanism rises, the water enters the anti-blocking mechanism, the water flows downwards in the anti-blocking mechanism, and the water flows into the next quartz sand layer which is not blocked, so that the quartz sand continuously filters the impurities in the sewage; after the impurities block the quartz sand, water and air quickly enter the storage mechanism from bottom to top to drive the anti-blocking mechanism to rotate in the storage mechanism, the movement speed of the quartz sand and the impurities in the storage mechanism is increased; the water and the air move upwards to drive the impurities to move upwards, and the impurities are discharged from the interior of the sewage discharge mechanism.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to the advanced biochemical treatment system for papermaking sewage. Background technique [0002] Papermaking wastewater refers to the wastewater generated during the pulping and papermaking process. Including pulping and cooking waste liquid, washing waste water, bleaching waste water and paper machine white water, etc. Papermaking wastewater has complex components and poor biodegradability. It belongs to difficult industrial wastewater and is one of the main sources of industrial pollution in my country. [0003] When there is sewage inside the sand filter, as the running time prolongs, the quartz sand retains more and more impurities, the resistance of the filter layer continues to increase, and the water level of the filter rises gradually. When the water level of the filter rises to a certain height, The filtration effect of the filter tank is obviously reduced, and most of t...

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Problems solved by technology

[0003] When there is sewage inside the sand filter, as the running time prolongs, the quartz sand retains more and more impurities, the resistance of the filter layer continues to increase, and the water level of the filter rises gradually. When the water level of the filter rises to a certain height, The filtration effect of the filter tank is obviously reduced, and most of the impurities are left in the upper layer of the sand filter tank. The quartz sand in the lower layer of the sand filter tank contains less impurities. When the upper surface layer of the quartz sand is blocked, the sand filter tank needs to be cleaned. The use of quartz sand The efficiency is low, the time interval for cleaning the sand filter is short, and the work intensity of people is increased

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