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Concentration treatment device and method for chemical nickel-plating rinsing wastewater

A technology of electroless nickel plating and treatment device, which is applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., and can solve the problems of large floor space, high adsorbent cost, and large energy consumption.

Pending Publication Date: 2020-12-04
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method converts the heavy metal ions in the raw sewage into water-insoluble hydroxides by adding alkali to the sewage; but the alkaline agent is not suitable for the removal of the heavy metal ions in the current complex state
The evaporation concentration method concentrates the heavy metal wastewater by evaporating the electroplating wastewater; however, it occupies a large area, consumes a lot of energy, and has high operating costs, which is not suitable for the current situation
The adsorption method uses the unique structure of the adsorbent to remove metal ions. The disadvantage is that the cost of the adsorbent is high and it is only suitable for the treatment of low-concentration wastewater.
The membrane separation method uses the selectivity of polymers to separate substances, and its disadvantage is that the surface of the membrane is easily polluted

Method used

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  • Concentration treatment device and method for chemical nickel-plating rinsing wastewater
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Effect test

Embodiment 1

[0029] A concentration treatment device for electroless nickel-plating rinsing wastewater of the present invention comprises a wastewater collection tank, a raw water pump, a bag filter, a tubular microfiltration, an intermediate water tank, an ultrafiltration, a nanofiltration and a first reverse osmosis successively connected through pipelines The concentrated water of the tubular microfiltration and the concentrated water of the ultrafiltration are respectively connected to the waste water collection tank, the concentrated water side of the nanofiltration is connected to the first reverse osmosis membrane, and the fresh water side of the nanofiltration is connected to the second reverse osmosis membrane. Two reverse osmosis membranes, the fresh water side outlet pipe of the first reverse osmosis membrane is provided with a conductivity meter, the fresh water of the first reverse osmosis membrane is returned to the water inlet side of the nanofiltration, and the concentrated w...

Embodiment 2

[0053] The use method of the concentrated treatment device of electroless nickel plating rinsing waste water of the present invention comprises the following steps,

[0054] 1) Add HMC-M2 nickel removal agent, PAC coagulant and neutral PAM flocculant to waste water collection tank 1, so that the suspended matter, organic matter, colloid, etc. Settling in the waste water collection tank and being effectively removed in the subsequent bag filter 2;

[0055] First of all, in order to capture the metal nickel in the complex state, it is necessary to add HMC-M2 nickel removal agent to the wastewater, and use its high-efficiency and selective effect to directly remove the complex nickel. Secondly, electroless nickel plating rinsing wastewater inevitably contains organic matter, so it is necessary to add PAC coagulant polyaluminum chloride to destroy and degrade organic matter. There are other impurities in the raw water, such as suspended solids and colloids. These impurities often...

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Abstract

The invention discloses a concentration treatment device and method for chemical nickel-plating rinsing wastewater. The device comprises a wastewater collection tank, a raw water pump, a bag filter, atubular micro-filter, an intermediate water tank, an ultrafiltration device, a nanofiltration device, a first reverse osmosis membrane and a concentrated water tank which are communicated in sequence, wherein the concentrated water of the tubular microfiltration and the concentrated water of the ultrafiltration are respectively communicated to a wastewater collection tank, the concentrated waterside of the nanofiltration is communicated to a first reverse osmosis membrane, the fresh water side of the nanofiltration is communicated to a second reverse osmosis membrane, and a conductivity meter is arranged on a pipeline on the fresh water side of the first reverse osmosis membrane. Fresh water of the first reverse osmosis membrane flows back to the water inlet side of the nanofiltration, and concentrated water is discharged to a concentrated water tank, or a part of the fresh water flows back to the front of the nanofiltration and a part of the fresh water flows back to the front of the first reverse osmosis membrane,the concentrated water of the second reverse osmosis membrane flows back to the water inlet side of the nanofiltration, and the fresh water in the fresh water side isdischarged after reaching the standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a concentration treatment device and a treatment method for electroless nickel plating rinsing wastewater. 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. [0003] The electroless nickel plating waste liquid contains a large amount of refractory organic pollutants and inorganic salts. The metal nickel content in each liter of waste liquid is as high as several grams. The combination of nickel ions and complexing agents EDTA, NTA, etc. forms a stable high-concentration refractory industrial waste. It is difficult to completely remove it by traditional chemical precipitation methods. At the same time, the electroless nickel plati...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04C02F103/16C02F101/30C02F101/20
CPCC02F1/001C02F1/444C02F1/442C02F1/441C02F9/00C02F2209/05C02F2301/046C02F2303/14C02F2209/06C02F2209/40C02F2209/03C02F2209/42C02F1/62C02F1/5245C02F1/56C02F2301/066C02F2103/16C02F2101/30C02F2101/20
Inventor 杜鹃张凯毕远伟魏世超刘明亚
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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