Introduction
Cutting fluid wastewater, emulsified liquid wastewater, oily wastewater, and cleaning wastewater are mostly generated during the processing and cleaning processes of components in industries such as metal machining, automotive parts manufacturing, metallurgy, forging, and casting.
Hazardous
Emulsified liquid and cutting fluid wastewater contain harmful substances such as waste soap solution, emulsified oil/water, hydrocarbon/water mixtures, emulsified liquid (paste), cutting agents, coolant, lubricants, wire drawing agents, etc. During use, bacterial action can lead to putrefaction, greatly increasing its toxicity and pollution. Different types of lubricant emulsions vary greatly, generally containing high levels of organic matter and oil, with high COD and BOD values. Wastewater also contains metal shavings, sand particles, and various pollutants, posing a serious threat to water sources. Improper storage and disposal of cutting wastewater will seriously endanger public health, affect the city’s image, and harm the environment.
Wastewater Sources:
Process
To address the challenge of treating wastewater from phosphoric acid iron and trivalent precursor materials, WSD Environmental Protection has developed a low-temperature evaporative crystallizer, which reduces energy consumption by over 50% and lowers operating costs. When wastewater from phosphoric acid iron and trivalent precursor materials undergoes pre-filtration and enters the low-temperature vacuum evaporative crystallizer, it evaporates under vacuum and low-temperature conditions. The water vapor condenses into distilled water during the vacuum extraction process, which is collected in a clean water tank. The remaining residue in the distillation kettle is collected in drums for further processing. This process significantly reduces or even eliminates harmful chemicals and heavy metals in the wastewater. The evaporation rate of the equipment can reach over 60%. Through pre- and post-treatment processes, the effluent is clear and transparent, meeting biochemical water quality standards, allowing for water reuse or discharge to meet standards. Residues are automatically discharged and transported for disposal.
Latest Technology
Advantages
1. It operates without generating harmful gas emissions or thermal pollution.
2. The system features fully automated control for seamless operation.
3. Its design is standardized, modular, and skid-mounted for easy installation and maintenance.
4. The evaporator includes automatic discharge and cleaning functions to enhance efficiency.
5. It is equipped with cloud platform management for remote monitoring and control.
6. The system supports companies in achieving zero discharge of electroplating wastewater.