Treatment of wastewater from new energy batteries
Published Time:
2023-05-25
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With the increasingly severe environmental situation, in order to further improve the proportion of low-carbon energy use, reduce reliance on traditional petrochemical energy, and enhance the manufacturing capacity of new energy and renewable energy equipment, energy-saving and energy-efficient MVR evaporators are used to treat wastewater from new energy batteries.
Wastewater in the new energy industry generally contains heavy metals (nickel, cobalt, manganese, and lithium). Traditional precipitation methods can no longer meet the increasingly stringent environmental requirements for treating such wastewater from new energy batteries.
Wastewater from new energy batteries is generally produced during the lead-acid battery production process, including the coating, forming, and battery cleaning processes, resulting in lead-containing heavy metal wastewater; meanwhile, in the fields of lithium batteries and solar cells, there will also be heavy metal wastewater, acid-base wastewater, high-nitrogen, and high-phosphorus wastewater.
For the treatment of lithium battery wastewater in the new energy industry, considering the characteristics of wastewater from new energy batteries, lithium batteries, and lead-acid batteries, as well as industry needs, the MVR evaporator has been further optimized and improved. Combined with the actual water quality conditions of the new energy battery wastewater industry, a process route suitable for the treatment of new energy battery wastewater has been designed: "pretreatment + MVR evaporation crystallization + post-treatment".
The MVR evaporator is mainly involved in the following two aspects of wastewater treatment from new energy batteries:
1. Evaporation and crystallization of wastewater generated during the production of lithium battery raw materials. This mainly focuses on the evaporation, concentration, crystallization, and drying processes during the production of lithium battery raw materials such as manganese sulfate, cobalt sulfate, lithium sulfate, nickel sulfate, zinc sulfate, lithium hydroxide, lithium carbonate, cobalt chloride, and lithium chloride.
2. Wastewater treatment in the new energy battery industry: zero-discharge treatment of product production wastewater. For example, various types of wastewater generated during the production of ternary materials (precursors), lithium iron phosphate, and copper foil, including high-salt wastewater such as ammonium chloride, ammonium sulfate, sodium chloride, and sodium sulfate.
For the new energy industry, lead-acid battery recycling, and the lithium battery industry, which are currently strongly advocated and developed by the country, these industries are both large water users and large wastewater producers. Therefore, in order to achieve the national wastewater discharge standards or zero wastewater discharge, wastewater-producing enterprises generally need to install environmental protection equipment to conduct deep treatment of wastewater and, as far as possible, achieve resource recovery and utilization.
Environmental protection equipment manufacturers, wastewater treatment companies, and evaporator manufacturers need to further optimize their products to address the challenges posed by the emergence of new types of wastewater.
In the new energy wastewater treatment industry, the use of MVR evaporators for lithium battery wastewater treatment, lead-acid battery wastewater treatment, and evaporation and desalination processes is more energy-efficient, economical, and reasonable, and can meet the standards required by enterprises.
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