Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop

Abstract

The invention belongs to the technical field of sewage treatment systems, and particularly relates to a zero-drainage treatment system for nickel plating wastewater in a steel workshop. The zero-drainage treatment system comprises a collection aeration water tank, a reaction aeration water tank, a concentration water tank, a tubular membrane filtration system, an active carbon filter, a retracement aeration water tank, a security filter, a first-stage RO (reverse osmosis) system, a concentrated water tank, a second-stage RO system, a fresh water tank, a water outlet pump and a plate-and-frame filter press, wherein the reaction aeration water tank is further connected with an alkalifying device, and the retracement aeration water tank is further connected with an acidifying device. Compared with the prior art, the zero-drainage treatment system disclosed by the invention is capable of enabling the wastewater drained from the steel workshop to achieve zero-drainage standards, so as to avoid harm to environment and human health, and enabling the nickel plating wastewater of the steel workshop to be effectively recycled. The invention further discloses a method for using the system for carrying out zero-drainage treatment on the nickel plating wastewater of the steel workshop.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment systems, and in particular relates to a zero-discharge treatment system and method for nickel-plating wastewater in iron and steel workshops. Background technique [0002] The process of nickel plating on the steel surface mainly includes three steps. One is the pretreatment process, which is mainly used to clean and activate the metal surface. It is commonly used in brighteners, complexing agents and corrosion inhibitors, etc.; The electroplating solution in the electroplating solution is mainly composed of main salt, complexing agent, conductive salt, buffer, anode activator and additives, among which the main salt is generally nickel sulfate; the third is the post-treatment process, which mainly includes cleaning and drying. In the whole production process, the workpieces in the pretreatment stage and after nickel plating need to be rinsed with water, thus forming nickel plating wastew...

AI Technical Summary

Problems solved by technology

[0003] Nickel in nickel-plating wastewater is a carcinogen. If the nickel-plating wastewater is discharged without treatment, it will not only cause waste of resources, but also cause serious harm to the environment and human health.

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