The core technology of low-temperature evaporator for treating high salt wastewater revolves around three major goals: achieving efficient evaporation in low-temperature environments, avoiding the hazards of high salt wastewater, and ensuring stable system operation. The core can be summarized into four key technologies:

Vacuum low-temperature evaporation technology: By maintaining a negative pressure environment of -0.085~-0.095MPa inside the equipment through a vacuum pump, the boiling point of high salt wastewater is reduced to 35-55 ℃, which not only reduces heating energy consumption (saving 40%~60% compared to traditional high-temperature evaporation), but also avoids the problem of rapid scaling of salt and corrosive ions exacerbating equipment loss at high temperatures. At the same time, it is suitable for high salt wastewater containing VOCs and thermosensitive components (reducing organic matter volatilization and component denaturation at low temperatures).

Efficient heat transfer technology: using high-efficiency heat exchangers such as plate type and falling film type, combined with turbulence enhancement design (such as inserting turbulence disruptors), to create turbulence in the wastewater on the heat transfer surface (breaking the boundary layer thermal resistance) and improve the heat transfer coefficient; At the same time, corrosion-resistant and high thermal conductivity materials such as 316L stainless steel and titanium alloy are selected to balance the requirements of "heat transfer efficiency" and "high salt corrosion resistance", avoiding a decrease in heat transfer capacity due to material corrosion and scaling.

Targeted pretreatment technology: Through chemical softening (adding sodium carbonate and sodium hydroxide to remove calcium and magnesium), precision filtration (removing suspended solids), air flotation/adsorption (removing oil, VOCs) and other pretreatment methods, easily scaling ions, impurities and interfering components in high salt wastewater are removed in advance, reducing the risk of scaling and blockage of heat exchange tubes from the source and laying a stable working condition foundation for subsequent low-temperature evaporation.

Intelligent stability control and anti blocking technology: relying on PLC fully automatic control system, real-time monitoring of vacuum degree, evaporation temperature, wastewater flow rate and TDS concentration, precise regulation of heating power and concentration ratio (to avoid ultra concentration crystallization); At the same time, it is equipped with automatic acid washing (to remove slight scaling), liquid level/flow protection (to prevent dry burning and flow interruption), gas-liquid separation (to prevent vacuum pump oil emulsification) and other functions to ensure long-term stable operation of the system.