Waste denitration catalyst regeneration zero-discharge wastewater treatment system

Abstract

The invention discloses a waste denitration catalyst regeneration zero-discharge wastewater treatment system. A treatment method comprises the following steps: collecting the production wastewater and together feeding into a regulation tank for regulating the water quantity and water quality; lifting the wastewater regulated in the regulation tank into a first-level coagulative precipitation tank by a pump, and adding lime milk, PAM, PAC and a heavy metal capture agent; adding Fe<3+> into the wastewater, then adding alkali to regulate the pH value to 8.5-9.0, and performing blast oxidation for 20-30min; adding a reducing agent into the wastewater; after 10-20min of reaction, adding lime milk; introducing the wastewater into a second-level coagulative precipitation tank, wherein the wastewater is further precipitated through coagulation; enabling the wastewater treated by the second-level coagulative precipitation tank to flow into a middle water tank, and lifting into a filter tank by a pump for filtration; and then, enabling the wastewater to flow into a clean water tank and reusing to a production line. The system disclosed by the invention realizes a good wastewater treatment effect, the wastewater is treated before recycling, and thus a zero-discharge wastewater system is realized.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a waste denitrification catalyst regenerated zero-discharge wastewater treatment system. Background technique [0002] The denitrification catalyst will be deactivated after being used for a period of time, and the deactivation can be divided into physical deactivation and chemical deactivation. The chemical deactivation of typical SCR catalysts mainly refers to catalyst poisoning caused by alkali metals, alkaline earth metals and As, etc., and the physical deactivation mainly refers to the destruction of catalyst activity caused by high temperature sintering, wear and blockage. For the regeneration of the chemical deactivation of the catalyst, the heavy metal capture agent HMCA-1, which can selectively capture the arsenic, mercury, calcium, beryllium, barium, magnesium, iron, etc. on the surface of the spent catalyst, can be effectively captured and removed The hea...

AI Technical Summary

Problems solved by technology

[0003] The traditional chemical deposition wastewater treatment can only meet the discharge standards stipulated by the state, but there are still traces of heavy metals in it, which exist in the water body in the form of heavy metal compounds, which are directly discharged and finally absorbed and accumulated by small animals or plants, and finally transferred to the high end of the food chain human beings; and the discharged water cannot be reused without advanced treatment, resulting in a waste of water resources

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