Environment-friendly treating system for hot galvanizing wastewater of iron tower

Abstract

The invention provides an environment-friendly treating system for hot galvanizing wastewater of an iron tower, and relates to the technical field of wastewater treatment. The environment-friendly treating system for the hot galvanizing wastewater of the iron tower comprises a filter treatment unit, a centrifugal dewatering unit, a primary precipitation unit, a primary pressing unit, a secondary precipitation unit, a secondary pressing unit, a distillation unit, a drying treatment unit and a condensing unit. Through mutual cooperation of all the units, iron ions in the wastewater are effectively removed, meanwhile, sodium chloride is recovered, the problem of pollution caused by direct discharging of the sodium chloride is avoided, a treatment system and a technology are simple and convenient, the cost is low, pickling wastewater can be treated on scale, solid phases generated in the centrifugal dewatering unit are dried and then delivered to a metal recovery factory, and the sodium chloride is recovered industrially, so that resource recycling is effectively achieved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an environment-friendly treatment system for iron tower hot-dip galvanized wastewater. Background technique [0002] Hot-dip galvanizing is a more commonly used method in the current galvanizing process. Hot-dip galvanizing is also called hot-dip galvanizing and hot-dip galvanizing. It is an effective metal anti-corrosion method and is mainly used for metal structural facilities in various industries. It is to immerse the rust-removed steel parts in the zinc solution melted at a certain temperature, so that the surface of the steel components is attached with a zinc layer, so as to achieve the purpose of anti-corrosion. In the hot-dip galvanizing process, pickling the galvanized parts is the most important part of the whole process. One of the important steps. [0003] At present, hydrochloric acid solution is generally used for pickling of plated parts. The hydroch...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an environment-friendly treatment system for iron tower hot-dip galvanizing wastewater, which solves the problem that the prior art generally discharges the neutralized solution directly, not only does not treat the iron ions in the wastewater Clean, and did not recycle sodium chloride, resulting in a waste of resources

Images