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各种化学工业生产过程中使用的蒸发浓缩操作,因分离水分所需的蒸发潜热很大,故耗用大量能量,以往都采取多效蒸发等措施。最近,开发了自蒸气再压缩式(VRC)省能型蒸发装置。 使用VRC方法,因被压缩的水蒸汽的比容积较大,蒸汽压较高,蒸汽温度在80℃以上较为有效。为得到产品,在低温下通过蒸发浓缩往往不能实现。从经济性出发,可考虑采用多效蒸发与VRC方法相结合,达到节能要求。热泵方式低温蒸发装置(简称HPE)可在常温操
Evaporation and concentration operations used in various chemical industry processes require large amounts of energy due to the large latent heat of vaporization required to separate the water and in the past have taken measures such as multi-effect evaporation. Recently, self-evaporating (VRC) energy-saving evaporators have been developed. The use of VRC method, due to the compressed water vapor larger specific volume, higher vapor pressure, steam temperature above 80 ℃ is more effective. Concentration by evaporation at low temperatures often fails to result in obtaining the product. From the economic point of view, consider the use of multi-effect evaporation combined with the VRC method to achieve energy-saving requirements. Low-temperature heat pump evaporation device (referred to as HPE) at room temperature operation