Nickel-containing wastewater treatment system

Abstract

The invention discloses a nickel-containing wastewater treatment system, which comprises a first reaction tank, a second reaction tank, a filter device, a third reaction tank, a membrane concentrating device, a settling pond and a collecting pond communicated sequentially, wherein a water outlet of the filter device is communicated with the third reaction tank; a sludge outlet of the filter device is communicated with a first pressure filter; a sludge outlet of the settling pond is communicated with a second pressure filter; a water outlet of the settling pond is communicated with the collecting pond; a sludge outlet of the second pressure filter is communicated with a sludge calcining furnace; a water outlet of the second pressure filter is communicated with the membrane concentrating device. The nickel-containing wastewater treatment system provided by the invention has a good treatment effect, zero pollutant discharge is realized, the sludge treatment cost and the load are effectively reduced, the problem of resource waste is solved, and the production cost of enterprises is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a nickel-containing wastewater treatment system. Background technique [0002] At present, there are many treatment methods for nickel-containing wastewater, such as membrane concentration method, ion exchange method, evaporation concentration method, electrolysis method, etc. [0003] However, most of the existing methods have the following disadvantages: the service life of the equipment is short, the operation and maintenance cost is high, and the concentrated solution or product recovered has complex components and contains many impurities, (i.e. Cu 2+ 、Cr 6+ 、Cr 3+ Heavy metal ions such as Cu 2+ 、Al 3+ Isocation, SO 4 2- , Cl - ,P 2 o 7 2- and other anions and a large number of organic impurities). In most cases, the recovered nickel cannot meet the recycling standards of its production line, and it is difficult to directly recycle in the production l...

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing methods have the following disadvantages: the service life of the equipment is short, the operation and maintenance cost is high, and the concentrated solution or product recovered has complex components and contains many impurities, (i.e. Cu 2+ 、Cr 6+ 、Cr 3+ Heavy metal ions such as Cu 2+ 、Al 3+ Isocation, SO 4 2- , Cl - ,P 2 o 7 2- anions and a large number of organic impurities)

In most cases, the nickel recyclate cannot meet the recycling standards of its production line, it is difficult to directly recycle in the production line, and the cost is high

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