Catalyst waste water zero discharge method and device

Abstract

The invention discloses a catalyst waste water zero discharge method and device. The problems are solved that concentrations of suspensions and ammonia nitrogen in catalyst waste water are high, the content of silicon dioxide fluctuates greatly and addition dosage is hard to control. The catalyst waste water zero discharge device comprises a primary settling unit, an adjusting unit, a silicon removal unit, an ammonia nitrogen processing unit, a softening unit, a filtering unit, a reverse osmosis unit and an evaporation crystallization unit. The beneficial effects are that the problems are solved effectively that the content of silicon dioxide in catalyst waste water fluctuates greatly and the addition dosage is hard to control; in addition, ammonia nitrogen in waste water is recovered, zero discharge of catalyst waste water and resource utilization are achieved, the whole system has a strong impact-resistant load capability, the technology steps are simple, and the problem of environment pollution of catalyst waste water is solved.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a method and a device for zero discharge of catalyst wastewater. Background technique [0002] At present, my country's petrochemical industry has ushered in a good opportunity for development. With the advancement of technology in the petrochemical industry, the types of catalysts are increasing and their components are complex, which brings difficulties to environmental governance. On the other hand, the standardization of my country's economic market and the increasing emphasis on environmental protection require us to use water resources reasonably and comprehensively to reduce the harm to the environment. Catalyst wastewater has the characteristics of large fluctuations in the content of ammonia nitrogen, suspended solids and silicon dioxide, and it is difficult to control the dosage. Since the sewage contains a large amount of suspended solids, si...

AI Technical Summary

Problems solved by technology

The traditional method of treating catalyst wastewater in the petrochemical industry is mainly to flocculate by adding polyaluminum or polyacrylamide flocculants in the primary settling tank, which results in a large amount of sludge, high operating costs, unstable operation of the desalination process unit, and effluent from the secondary settling tank. High suspended solids

The quality of effluent water is not up to standard, and there are still certain difficulties and restrictions on the reuse of catalyst wastewater

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