Plastic electroplating chemical nickel wastewater treatment system and method thereof

Abstract

The invention discloses a plastic electroplating chemical nickel wastewater treatment system and method. The system comprises a chemical nickel wastewater collection pool, a nickel metal recovery module, a water reuse module and a post-treatment module; the chemical nickel wastewater collection pool is communicated with the nickel metal recovery module, and the nickel metal recovery module is communicated with the water reuse module; a water outlet of the nickel metal recovery module is connected with the water reuse module, and a concentrated wastewater end of the water reuse module is connected to the post-treatment module; the nickel metal recovery module is chelating type cation exchange resin, and the water reuse module comprises strong acid type cation exchange resin, weak base anion exchange resin, gel strong acid cation exchange resin and gel strong base anion exchange resin which are sequentially connected in series. And the outlet water of the water recycling module is respectively connected to a water recycling water storage barrel and a resin regeneration water storage barrel. The system and the method thereof can ensure that the conductivity of the recycled water is continuously and stably less than 50us / cm, and can be used for recycling substances, so that resources are saved, and the cost is reduced.

Description

technical field [0001] The invention relates to a plastic electroplating chemical nickel wastewater treatment system and a method thereof. Background technique [0002] The total phosphorus in the wastewater discharged from plastic electroplating mainly comes from the hypophosphite and phosphite in the chemical nickel wastewater, and the ammonia nitrogen mainly comes from the ammonium ion (NH 4 + ), chemical nickel wastewater also contains citrate and other organic strong complexing agents. If the wastewater is not separated and classified, only traditional physical and chemical treatment methods are used. Due to the presence of strong complexing agents such as citrate, it is difficult to precipitate heavy metals in wastewater , It is difficult for the external drainage after water treatment to discharge continuously and stably up to the standard. [0003] The existing chemical nickel wastewater treatment technology is aimed at end-standard discharge, and there are many re...

AI Technical Summary

Problems solved by technology

[0002] The total phosphorus in the wastewater discharged from plastic electroplating mainly comes from the hypophosphite and phosphite in the chemical nickel wastewater, and the ammonia nitrogen mainly comes from the ammonium ion (NH 4 + ), chemical nickel wastewater also contains citrate and other organic strong complexing agents. If the wastewater is not separated and classified, only traditional physical and chemical treatment methods are used. Due to the presence of strong complexing agents such as citrate, it is difficult to precipitate heavy metals in wastewater , it is difficult for the external drainage after water treatment to discharge continuously and stably

[0003] Existing chemical nickel wastewater treatment technology is aimed at end-standard discharge, and there are many related patents, but the application of metal recovery and water reuse technology is lacking, and insufficient attention is paid to the recycling of renewable resources

As the country attaches great importance to clean production, sewage permit system and improving the level of hazardous waste pollution prevention and control, a single water treatment technology can no longer meet the requirements

Images