200L Multi effect Distilled Water Machine

The process of a multi effect distilled water machine is as follows: the raw water is heated by industrial steam in the first effect preheater, and after entering each effect preheater, it is further heated by secondary steam; The condenser is heated by secondary steam and distilled water; Then, at the top of the evaporator, it is evenly distributed into the evaporator tubes through a water separation device, forming a thin film like water flow inside the evaporator tubes; These water flows are quickly evaporated due to their thinness, producing secondary steam; The raw water that has not been evaporated is transported to the next effect as the raw water for the secondary effect evaporator. Similar to this, the raw water that has not been evaporated will enter the next effect. If it has not been evaporated until the next effect, it will be discharged as condensed water; The raw water that has been evaporated is now secondary steam, which continues to spiral upwards in the evaporator, passes through a special separation device in the middle and upper parts, and enters the pure steam pipeline as a secondary heat source; The secondary steam condenses into distilled water after absorbing heat in the secondary effect; The process of each effect is similar to this. The distilled water of each effect and the secondary steam of the final effect are collected by the condenser, and after heat exchange with the cooling water and raw material water, they are cooled to become distilled water; After online detection of conductivity, qualified distilled water is output as injection water, and unqualified distilled water will be discharged. The secondary steam converted from raw water is clean steam, which undergoes three separation processes: after initially entering the evaporator, it flows down the tubes and evaporates simultaneously, which is the secondary separation; The evaporated raw water (secondary steam) is turned back 180 degrees at the lower end of the evaporator, and impurities are separated to the lower part by gravity, which is the second separation; The evaporated raw water, i.e. secondary steam, continues to spiral upwards in the evaporator and reaches the special separation device in the middle and upper parts for the third separation. The cooling water only passes through the condenser to cool down the distilled water produced by each effect and the secondary steam of the final effect. Industrial steam in the evaporator and preheater heats the raw water, and the heat is absorbed and discharged as condensed water outside the machine. In the condenser, there is a portion of gas that cannot condense into water, called non condensable gas, which will be removed by the exhaust device installed on the upper part of the condenser. Depending on the model, non condensable gas continuous discharge devices may also be installed on each evaporator.

The principle of electric heating film evaporation is adopted, which uses preheated (80 ℃) water to form a high-temperature (80 ℃) liquid film on the surface of the electric heating tube and immediately evaporates, producing a pure steam (127 ℃) as the heat source for the next effect. After another heat exchange, a second pure steam is produced as the heat source for the next effect, and the condensed water produced is distilled water. After six heat exchanges, the effective utilization rate of electric heating can be increased by 43%.