Treatment method and treatment system for spent electroless nickel solution

Abstract

The invention specifically relates to a treatment method and treatment system for a spent electroless nickel solution, belonging to the technical field of purification and treatment of spent electroless nickel solutions. According to the treatment method, the mother liquid of a spent electroless nickel solution is subjected to pretreatment so as to realize removal and sorted collection of a greatamount of nickel ions and phosphorus ions in the mother liquid of the spent electroless nickel solution, so the concentrations of nickel and phosphorus in the mother liquid of the spent electroless nickel solution are reduced; and then the mother liquid of the spent electroless nickel solution is mixed with cleaning wastewater produced in chemical nickel-plating so as to realize further removal and sorted collection of mixed waste liquid with low nickel ion and phosphorus ion concentrations, so the treatment load of a mixed waste liquid treatment device is reduced, and the stable operation ofthe whole treatment system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of purification and treatment of chemical nickel waste liquid, in particular to a treatment method and system for chemical nickel waste water. Background technique [0002] Chemical nickel wastewater is mainly divided into chemical nickel waste mother liquor and chemical nickel plating cleaning wastewater. The existing chemical nickel wastewater treatment mainly focuses on the treatment of chemical nickel plating cleaning wastewater, but the treatment effect of chemical nickel waste mother liquor is not good. The mixed treatment of waste mother liquor and electroless nickel plating cleaning wastewater eventually leads to the disadvantages that the total nickel and total phosphorus in the overall effluent cannot be stably guaranteed. The existing technology cannot form a complete process flow for the chemical nickel wastewater discharged from chemical nickel plating. When disposing of part of the cleaning was...

AI Technical Summary

Problems solved by technology

[0002] Chemical nickel wastewater is mainly divided into chemical nickel waste mother liquor and chemical nickel plating cleaning wastewater. The existing chemical nickel wastewater treatment mainly focuses on the treatment of chemical nickel plating cleaning wastewater, but the treatment effect of chemical nickel waste mother liquor is not good. The mixed treatment of waste mother liquor and electroless nickel plating cleaning wastewater will eventually lead to the inability to guarantee the stability of total nickel and total phosphorus in the overall effluent, etc.

The existing technology cannot form a complete process flow for the chemical nickel wastewater discharged from chemical nickel plating. When disposing of part of the cleaning wastewater, the enterprise also needs to outsource some of the high-concentration chemical nickel waste mother liquor. great economic pressure

[0003] In addition, the existing chemical nickel wastewater treatment technology does not clearly classify the sludge after disposal, which is not conducive to the subsequent resource utilization; there is a large amount of ammonia water as a pH buffer in the waste mother liquor of chemical nickel and chemical nickel plating cleaning wastewater. The Fenton reaction method, the reaction conditions are relatively harsh, which not only brings great difficulties to the pH adjustment of the subsequent purification treatment, but also consumes a lot of acid and alkali, and also converts the ammonium ions into ammonia gas and spills into the operating space , the operating environment is relatively harsh, causing certain hazards to the health of operators

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