Evaporation Technology
Dryer Vapor heated evaporation plants
The energy costs of an evaporator can be significantly reduced by using dryer vapor for heating.
The energy costs of an evaporator can be significantly reduced by using dryer vapor for heating.
The main criterion for the use of dryer vapor to heat evaporation plants is the component of inert gases and/or air and thus the dew point of the water steam-air mixture. The higher the dew point, the higher the water steam content and thus the usable energy content.
If the dryer vapors contain dust and grease vapors these can be deposited in the calandria and thus disrupt and even prevent the heat transfer from the heating to the boiling chamber. This can be avoided by cleaning the dryer vapor in a GEA vapor scrubber. Usually it is a jet scrubber, a self priming liquid jet fan which is perfectly suited for this application. The vapor scrubber can be operated with the vapor condensate from the evaporation plant. Thus, no additional process water is necessary.
In this way, the energy was saved for heating the evaporation and simultaneously clean the dryer exhaust.
The energy costs of an evaporator can be significantly reduced by using waste heat resources like hot water.
In case of multiple-effect evaporation plants, the exhaust vapor from the product are used to heat the downstream-arranged evaporation effect so that the steam consumption will be reduced accordingly.
机械蒸汽再压缩机 (MVR) 加热的蒸汽设备只需要特别少的能量。
使用热力蒸汽再压缩机 (TVR)，和其他蒸发方法一样节省蒸汽/能源。
传统上，使用直接蒸汽加热的蒸发器有单效和多效之分。通常使用新鲜蒸汽作为能量来源，但是也可以使用废热（如干燥机蒸汽）。
