Rinse Water Recycling
A rinse water loop is a wastewater treatment system that cleans and recycles rinse water after pickling. This is done via ion exchange or membrane filtration to meet environmental limits for heavy metals and acids.
Physicochemical Mechanism of Action
Rinse-water recirculation covers the cascading and treatment of rinse waters after the pickling process. Heavy metals and acids are removed by ion exchange or membrane filtration so the water gets cleaned and fed back into the process.
Metallurgical Relevance & Welding Risks
Handling the rinse-water loop wrong can cause environmental pollution, because untreated rinse water contains heavy metals and acids. It can also shorten the life of the membranes or ion exchangers and hurt the efficiency of the system.
Workshop Practice & Instructions
To run the rinse-water loop effectively, keep these points in mind:
• Regularly clean and check the membranes or ion exchangers.
• Stick to the specified pH values and heavy-metal concentrations in the rinse water.
• Avoid surplus acids and metals in the rinse processes.