Efficient and energy-saving wastewater evaporation crystallizer

A method for evaporating wastewater by a wastewater evaporation crystallizer, wherein the wastewater evaporation crystallizer comprises an evaporating tube inlet, an inlet chamber, an evaporating tube body, an outlet chamber, and an evaporating tube outlet successively coupled, the method comprising:

• obtaining a flue gas through the evaporating tube inlet into the inlet chamber;
• adjusting a pneumatic inlet baffle and a pneumatic outlet baffle to regulate a flow amount and a flow rate of the flue gas, the pneumatic inlet baffle disposed between the inlet chamber and the evaporating tube body, and the pneumatic outlet baffle disposed between the evaporating tube body and the outlet chamber, wherein:
• a first end of the pneumatic inlet baffle is configured to couple to the inlet chamber, and a second end of the pneumatic inlet baffle is configured to couple to the evaporating tube body, and
• a first end of the pneumatic outlet baffle is configured to couple to the evaporating tube body, and a second end of the pneumatic outlet baffle is configured to couple to the outlet chamber:
• transferring the flue gas through the inlet chamber into the evaporating tube body;
• obtaining, from a wastewater nozzle disposed inside the evaporating tube body, a plurality of atomized liquid droplets;
• mixing, in the evaporating tube body, the plurality of atomized liquid droplets and the flue gas;
• and
• evaporating the plurality of atomized liquid droplets to form crystals suspended in the flue gas.