Triple effect wastewater evaporator-Changzhou Binda Drying Granulation Equipment Co., Ltd

Principle of Three Effect Evaporator

The principle of triple effect evaporation is the evaporation operation after the combination of three evaporators. During operation, the triple effect evaporator requires that the pressure and boiling point of the solution in the aftereffect be lower than those in the previous effect evaporator. The secondary steam in the previous effect is introduced as the heating medium for the aftereffect, and the heating chamber in the aftereffect becomes the condenser for the secondary steam in the previous effect. Generally, the first effect requires the consumption of steam. Understanding the principle of a three effect evaporator can lead to a better understanding of the three effect evaporator, its composition, and the working principle of the three effect evaporator, which can facilitate better operation of the three effect evaporator.

Composition of Three Effect Evaporator

The three effect evaporator mainly consists of three sets of evaporators connected in series, including evaporator, condenser, salt separator, and replication equipment, forming a complete set of three effect evaporation system.

Working principle of triple effect evaporator

The material that needs to be evaporated enters the first effect heater through the feed pump for heating, then enters the evaporation chamber for evaporation, and undergoes gas-liquid separation in the separator. The solution flows from the bottom of the separator into the suction port of the circulation pump, and is sent to the heater and separator for circulation and evaporation by the circulation pump. The evaporated steam enters the condenser and is completely condensed.

In the evaporation heat exchange chamber, external steam liquefaction generates latent heat of vaporization, which heats the wastewater. Due to the high pressure inside the evaporation heat exchange chamber, the material is heated to superheating at a pressure higher than the normal boiling point of the liquid in the evaporation heat exchange chamber. After the heated liquid enters the crystallization evaporation chamber, the pressure of the material rapidly decreases, causing some of the material's aqueous solution to flash or boil.

The steam evaporated from the wastewater enters the secondary evaporator as a power evaporator for heating, while the unevaporated wastewater and salt are temporarily stored in the crystallization evaporation chamber. The first effect, second effect, and third effect evaporators are connected through balance pipes. Under negative pressure, high salt containing wastewater or materials flow from the first effect to the second and third effects in sequence. The wastewater is continuously evaporated, and the concentration of salt in the wastewater increases. When the salt in the wastewater material exceeds the saturation state, the salt in the water will continuously precipitate and enter the salt collection chamber at the lower part of the evaporation crystallization chamber. The entire process repeats itself, achieving saltwater separation.

The condenser is connected to a vacuum system, which extracts the uncondensed gas generated in the evaporation system, keeping the condenser and evaporator in a negative pressure state and improving the evaporation efficiency of the evaporation system. Under negative pressure, the secondary steam generated by the wastewater in the three effect evaporator automatically enters the condenser. Under the cooling of circulating cooling water, the secondary steam generated by the wastewater material quickly transforms into condensed water. The condensed water can be recycled to the reuse water tank through continuous outflow.

Characteristics of Three Effect Evaporator

High security performance and faster speed

More accurate precision and convenient maintenance

Stable performance and complete functionality

Easy to operate, saving manpower