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Chemical nickel wastewater treatment method and treatment system used by same

A treatment system and treatment method technology, applied in the field of chemical nickel wastewater treatment method and its treatment system, can solve the problems of large dosage, high treatment cost, difficult removal, etc., and achieve improved replacement, simple treatment method, and water discharge good water quality

Pending Publication Date: 2018-10-02
江苏善鼎环保科技有限公司
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AI Technical Summary

Problems solved by technology

The combination of nickel ions and complexing agents forms a stable high-concentration refractory industrial waste liquid, which is difficult to completely remove by traditional chemical decomposition and precipitation methods
At the same time, the electroless nickel plating waste liquid contains high levels of hypophosphite and phosphite ions, which will cause eutrophication of water without treatment
[0003] In the conventional chemical nickel wastewater treatment, it is difficult to take the nickel ions away from the complexing agent by adding heavy catcher, so the dosage is huge and the treatment cost is also high, so it is necessary to develop a new chemical nickel Wastewater treatment method and treatment system

Method used

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  • Chemical nickel wastewater treatment method and treatment system used by same
  • Chemical nickel wastewater treatment method and treatment system used by same

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] A treatment method for chemical nickel waste water, comprising the steps in turn:

[0026] (1) Pass the chemical nickel wastewater into the pH adjustment tank 1, adjust its pH value by adding sulfuric acid to make it acidic, and conduct online monitoring through the pH meter 16 in the pH adjustment tank 1 to accurately control the dosage of sulfuric acid.

[0027] (2) The wastewater in the pH adjustment tank 1 flows into the electrocoagulation system 2 by itself. The electrocoagulation system 2 includes a first electrode 202 and a second electrode 203. The first electrode 202 is an anode, the second electrode 203 is a cathode, and the first electrode 202 The material is iron. When the wastewater passes through the electrocoagulation system 2, the basic reaction process is as follows:

[0028] Anode reaction: Fe+2e→Fe 2+ ;

[0029] Cathodic re...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a chemical nickel wastewater treatment method and a treatment system used by the same. The treatment method sequentially comprises steps as follows: (1) chemical nickel wastewater is introduced into a pH regulating tank, and the chemical nickel wastewater is adjusted to be acidic; (2) the chemical nickel wastewater is introduced into an electric flocculation system, wherein the electric flocculation system comprises a first electrode and a second electrode, the first electrode is an anode, the second electrode is a cathode, the first electrode is made of iron, complexing chains or chelating chains in the wastewater are broken through electric connection, and nickel in the wastewater participates in a replacement reaction in a molecular grain state to be separated out in a form of hydroxide precipitate; (3) wastewater obtained in the step (2) is introduced into a pH readjusting tank, and the wastewater is adjusted to be alkaline; (4) the wastewater is introduced into an MBR (membrane bioreactor) membrane pool to be filtered; (5) the wastewater is introduced into a resin tank for further adsorptionof metal nickel. The treatment method is simple to operate, addition of a recapturing agent is not required, the amount of produced sludge is small, and rear-section MBR membranes cannot be blocked.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating chemical nickel wastewater and a treatment system thereof. Background technique [0002] Electroless nickel plating is an amorphous coating formed by the joint action of nickel salt and hypophosphite. It is a cutting-edge surface treatment technology and is widely used in the fields of electronics, petroleum, computers and automobiles. With the continuous extension of the electroless plating time, when the by-products such as sulfite ions in the solution reach a certain concentration, the electroless plating solution will spontaneously decompose, the deposition of the metal-phosphorus alloy coating will be affected, and the wear resistance of the coating will decrease. Lead to waste, the formation of chemical nickel waste. The composition of chemical nickel wastewater is complex. In addition to nickel ions, wastewater also contains a large amou...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/16C02F101/20
CPCC02F9/00C02F3/1273C02F2103/16C02F2001/46133C02F2101/20C02F1/28C02F1/66C02F1/463C02F2209/06C02F2301/08
Inventor 夏宝祝
Owner 江苏善鼎环保科技有限公司
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