TW201904876A - Nickel waste liquid and treatment method of Nickel washing water enabling nickel plating waste liquid and the Nickel washing water to be reused - Google Patents

Abstract

Disclosed are a nickel plating waste liquid and a treatment method of Nickel washing water. The disclosed is mainly to provide an innovative treatment process, wherein the nickel plating waste liquid and the Nickel washing water produced by electroplating nickel on an industrial product can be reused by using the treatment method of the present invention. The primary steps include: firstly concentrating the nickel plating waste liquid, purifying by using activated carbon, then subjecting to activation procedure in order to restore a standard value set originally, thereby providing the liquid for reuse. As to the Ni washing water or chemical Ni washing water, first the washing water is filtered, and then a resin is used to absorb Ni ions therein in order to enable the processed liquid to be as close as possible to pure water, thereby providing the liquid for reuse as water resource, In addition, nickel residues can be obtained from the resin with absorbed Ni ions through the steps of regeneration and precipitation process for reused, and the resin can also be reused, thereby achieving the optimal efficacy of environmental protection.

Description

 Nickel waste liquid and nickel water washing liquid treatment method  

The invention relates to an electroplating nickel waste liquid and a nickel water washing liquid processing method, which mainly provides an innovative treatment process, which can process electroplating or chemical nickel waste liquid and nickel water washing liquid produced by industrial products after nickel plating, by the treatment of the invention Method, recovering the metal nickel therein, and purifying the waste liquid, so that it can be reused again to achieve the best environmental protection effect

In order to provide diversified use of industrial products, many articles are plated with a layer of metallic nickel on the exterior of the article by electroplating or chemical treatment to give it the specific characteristics required. However, in the process of nickel plating, electroplating or chemical nickel waste liquid and nickel water washing liquid will inevitably occur. If it is discharged without treatment, it will cause environmental pollution and waste resources. Although it is known that the pH value is simply adjusted by using the caustic soda, and then PAC coagulation, PAM flocculates and precipitates to remove nickel ions, but the effect is not good, and there is no treatment for the treated nickel sludge and water resources. The system used can not meet the high environmental requirements of today's people.

The invention relates to an electric nickel waste liquid and a nickel water washing liquid processing method, which mainly provides an innovative treatment process, which can waste the liquid produced by the industrial product after nickel plating, including electroplating or chemical nickel waste liquid and nickel water washing liquid, etc. By the treatment method of the invention, it can be made available to the user again, wherein the main steps of the treatment method for the electroplating nickel waste liquid are firstly concentrated, then purified by activated carbon, and then subjected to an activation procedure to recover The original standard value is set, and for the nickel water washing liquid, the first filtration is performed, and then the nickel ions are adsorbed by the resin, so that the treated liquid becomes almost pure water, and the water resources for reuse are available. Further, the resin which has adsorbed nickel ions can also obtain nickel slag by the steps of regeneration and sedimentation for reuse, and the resin can be reused to achieve industrial applicability.

(11)‧‧‧Electroplating nickel waste liquid

(12)‧‧‧ Concentration

(13) ‧ ‧ purification

(14) ‧ ‧ activation

(15)‧‧‧Electroplating nickel solution

(20)‧‧‧Chemical nickel waste liquid

(201)‧‧‧pH adjustment heating

(202) ‧ ‧ Settlement

(203)‧‧‧ Nickel slag

(204)‧‧‧Settling liquid

(21)‧‧‧Electroplating nickel water washing solution

(22)‧‧‧Filtering procedures

(22)‧‧‧Resin adsorption

(23)‧‧‧ pure water

(31)‧‧‧Resin

(32)‧‧‧Washing

(33)‧‧‧Acid rinse

(34) ‧‧‧Regeneration

(35) ‧ ‧ lye washing

(36)‧‧‧Recycled nickel liquid

(37) ‧ ‧ Settlement

(38)‧‧‧ Nickel slag

Figure 1 Flow chart of the treatment of electroplated nickel waste liquid of the present invention

Figure 2 Flow chart of the treatment of the nickel water washing liquid of the present invention

Figure 3 Flow chart of the treatment of the resin of the present invention

The invention relates to a method for treating nickel plating waste liquid and nickel water washing liquid, which comprises treating nickel plating waste liquid generated in a plating tank during electroplating, and nickel water washing liquid or chemical nickel waste generated when water washing nickel plating articles in a water washing tank. The method of liquid. First, as shown in FIG. 1 , since the nickel ion concentration in the electroplating nickel waste liquid is usually greater than 3000 ppm, the main step of treating the electroplated nickel waste liquid in the present invention is to vacuum-distill or heat the electroplated nickel waste liquid (11). The method is concentrated (12) to increase the concentration, and then the organic substance is removed by an activated carbon filtration cycle, and maintained in an environment having a pH of less than 4 to achieve the effect of purification (13), and then alkali nickel is used to raise the pH. The value is between 4 and 5, and an additive filtration cycle is added until the value returns to the same standard value as the plating solution on the line, that is, the activation (14) procedure is completed, and the electroplated nickel is available for reuse. Liquid (15).

In addition, for the finished electroplated article, the electroplated nickel water washing liquid (21) produced after the water washing process, and the chemical nickel waste liquid (20) produced by chemical nickel plating nickel plating, the processing flow of the present invention is as shown in the figure. As shown in the second, the chemical nickel waste liquid (20) first adjusts the pH value (201) to 8 or more by using the alkali liquid and heats it to 50 ° C or higher, and then performs sedimentation treatment (202) to separate the nickel residue (203), and the chemical thereof Both the nickel precipitation water (204) portion and the electroplated nickel water washing solution (21) can be subjected to a filtration process (22) with activated carbon to remove organic matter therein, and then adsorb (23) nickel ions therein using a cation resin, and then After the anion resin adsorption treatment, the liquid subjected to the secondary adsorption treatment can be brought into a state of nearly pure water (23), and the water resource for reuse can be used, and the resin (31) which has adsorbed nickel ions is further used. The treatment process is shown in Figure 3. After washing with water (32), the nickel ions are washed out by acid washing (33), the nickel liquid and the resin are separated, and then washed with water to obtain regeneration (34). Efficacy, then rinse with lye (35) to raise the pH to above 4, making the resin available again For the separated regenerated nickel liquid (36), the nickel slag (38) can be repeatedly obtained by the sedimentation (37) for reuse, and the settled water washing liquid can be repeated for the above process. In order to achieve better purification and recycling effects, the best efficacy of the present invention is achieved.

In summary, the present invention can obviously achieve a perfect purification effect for treating electroplating nickel waste liquid, nickel water washing liquid, chemical nickel liquid, etc., and can not only recover metal nickel, but also water and resin required for the treatment process. All of them can be fully recycled and reused under continuous processing steps, which are environmentally friendly and meet the needs of the industry.

Claims (2)

 The invention relates to a method for treating nickel plating waste liquid and nickel water washing liquid, comprising the steps of treating nickel plating waste liquid generated in a plating tank during electroplating, and electroplating nickel water washing liquid and chemical nickel waste liquid generated by washing the electroplating articles in a water washing tank; The treatment step of electroplating nickel waste liquid is to first vacuum-distill the nickel-plated waste liquid by vacuum distillation or heating to increase the concentration, and then remove the organic substance by the activated carbon filtration cycle, and keep the pH value less than 4 Performing, purifying, and then using alkali nickel to increase the pH between 4 and 5, and adding an additive filtration cycle until the value returns to the online electroplating liquid phase, that is, the activation is completed for reuse. Electroplating nickel liquid; chemical nickel waste liquid is adjusted by alkali to pH above 8 and heated to above 50 ° C, and then treated by sedimentation to separate nickel slag, and its chemical nickel sedimentation liquid and electroplated nickel water washing solution, The system is filtered with activated carbon to remove the organic matter, and then the nickel resin is adsorbed by the cation resin, and then subjected to the adsorption treatment of the anion resin to make the liquid subjected to the secondary adsorption treatment. It is a state of almost pure water, and it is available for reuse.    The method for treating nickel-plated waste liquid and nickel water washing liquid according to claim 1, wherein the resin having adsorbed nickel ions can be washed with water and then washed with nickel to wash out nickel ions. The liquid and the resin are separated, washed with water to obtain regeneration, and then rinsed with an alkali solution to raise the pH to above 4, so that the resin can be reused, and the separated nickel liquid can be repeatedly obtained by sedimentation. Slag for use.