Working principle:
Liquid inlet: The high concentration waste liquid is pumped into the measuring device water tank through an external pump. When the vacuum pressure reaches, the automatic valve opens and is sucked into the kettle tank to complete the liquid inlet and measurement.
Heating: After the liquid inlet is completed, open the steam valve and heat the waste liquid through the jacket, exchanging heat with the water in the hazardous waste to provide thermal energy for reducing the moisture content.
Distillation: The vacuum pump evacuates the entire process to -80 to -90kPa, causing water to boil and evaporate at 45 ℃. The low-temperature state can prevent other substances from undergoing secondary qualitative changes due to high temperatures.
Slag discharge: During the heating process, stir and heat evenly. After setting the cooking cycle and batch, the kettle residue is automatically discharged through the stirring device to complete the discharge work.
Drainage: The water vapor evaporated from hazardous waste is condensed into clean distilled recycled water through a condensing device, stored in a recycling water tank, and pumped for subsequent use or direct discharge according to the customer plan of Longfor MVR multi effect
evaporator.
System composition:
For physical production enterprises, the extended hazardous waste in the process is more or less difficult to avoid, and the production cost of outsourcing hazardous waste puts great pressure on the enterprise. The drying evaporator of Longhu mother liquor adopts vacuum distillation technology, and the substance is directly crystallized from high concentration waste liquid in a distillation kettle, which can reduce the discharge of hazardous waste such as sludge and high concentration waste liquid for enterprises. On the one hand, it reduces the cost of production enterprises, and on the other hand, it can better match the disposal capacity of external hazardous waste disposal units. This device is widely used in surface treatment of phosphorus containing waste liquid, membrane filtration, MVR concentrated water to crystallization, PCB electroplating and other heavy metal waste liquid solidification, high salt and high COD waste liquid to crystallization, organic solvent extreme concentration, chemical industry acid-base waste liquid salt crystallization, cutting fluid/grinding fluid/release agent extreme concentration, oil sludge/sludge drying and other fields.
Application areas:
Concentrated electroplating waste liquid (gold, silver, copper, nickel, etc.), panel front-end process wastewater, anode treated phosphoric acid wastewater, emulsified cutting fluid wastewater, grinding wastewater, coating waste liquid, fluoric acid wastewater, ammonium sulfate waste liquid, boron containing waste liquid, various salt containing waste liquids, sludge concentration and dehydration, mixed acid wastewater.