特点：

喷射泵没有活动部件，不易磨损限度保证操作的可靠性使用一台喷射泵节约的蒸汽耗量相当于额外增加了一效蒸发器带喷射泵的蒸发工艺，可有效减少未效的蒸发量，节省系统冷却水耗量。除TVR外，MVR是最近化工行业发展迅速的新型蒸发技术，其基本原理是用压缩机或者高压蒸汽提高二次蒸汽的压力和温度，然后送回原蒸发器的加热室，作为加热蒸汽使用，或者以二次蒸汽为低温热源，回收部分余热。提高二次蒸汽的压力和温度常用的有两种方法，一种是蒸汽机械再压缩技术MVR(MechanicalVaporRecompression)，另一种则是蒸汽热力再压缩技术TVR(ThermalVapourRecompression)。TVR蒸发器此蒸发器系统相对于直排放二次蒸汽的系统来说有所改进，它利用暗射式热泵来回收部分二次蒸汽，由干喷射式热泵1ka高压菜汽只能引射0.3kg的二次蒸汽，因此虽然此系统结构简单紧凑，但是能效比较低。热泵蒸发常用的形式大体上有上文所述的喷射式热泵蒸发(TVR)和直接压缩二次蒸汽机械压缩式热泵蒸发(MVR)，近年来，由于工程材质、结构及制造技术的显著进步以及能源价格的上涨，机械压缩式热泵已越来越为人们所重视。热泵广泛用于各种稀溶液的蒸发浓缩，在实际的工业生产中，使用热泵蒸发技术已经被证明有很好的经济性。热泵装置只需消耗少量的高质能量就能得到比较多的热能，减少了能源的浪费。在大多数应用中，热泵蒸发的能量消耗比单效或多效蒸发的低得多，并且热泵技术的采用可以取代大量的锅炉房，节省燃料、减少大气的污染、余热得到利用的同时也减少了热污染，因而使城市的环境卫生必然得到改善，也有利于生态平衡。热泵蒸发是一种低能耗的十分可靠的蒸发方法，由于节能和稳定已经在化工过程中取得了广泛的应用。

The jet pump has no moving partsso it is not easy to wear, and the reliability of operation is guaranteed to the maximum extent The steam consumption saved by using one jet pump is equivalent to adding an additional one-effect evaporator. The evaporation process with jet pump can effectively reduce the ineffective evaporation and save the cooling water consumption of the system. In addition to TVRMVR is a new evaporation technology that has developed rapidly in the chemica industry recently.ts basic principle is to increase the pressure and temperature of the secondary steam with a compressor or high-pressure steam, and then send it back to the heating chamber of the original evaporator to beused as heating steam. or use the secondary steam as a low-temperature heat source to recover part of the residual heat.There are two common methods to improve the pressure and temperature of secondary steam, one is mechanical vapor recompression (MVR) and the other is thermal vapor recompression(TVR).TVR evaporator Compared with the system of directly discharging secondary steam, this evaporator system is improved.It uses jet heat pump to recover part of secondary steam. Because 1kg of high-pressure steam of jet heat pump can only inject 0.3kg of secondary steam, although the structure of this system is simple and compact, its energy efficiencyisrelatively low. Generally, the commonly used forms of heat pump evaporation are jet heat pump evaporation(TVR) and direct compression secondary steam mechanical compression heat pump evaporation(MVR).In recent years. due to the remarkable progress of enaineering materias, structure and manutacturing technoloay and the rising enerayprice.mechanicacompression heat pump solutions, In actual industrial production,the use of heat pump evaporation technology has been proved to be very economical, has aftracted more and more aftention. Heat pump is widelyused in the evaporation and concentration of various dilute The heat pump device can get more heat energy only by consuming a small amount of high-quality energy. which reduces the waste of eneray In most applications.the eneray consumption of heat pump evaporation is much lower than that of single-effect evaporation or multi-effect evaporation and the adoption of heat pump technology can replace a large number of boiler rooms. saving fuel,reducing atmospheric pollution. and reducing heat pollution while using waste heat. thus improving the environmental sanitation of cities and benefiting the ecological balance.Heat pump evaporation is a very reliable evaporation method with low energy consumption, which has been widely used in chemical process because of its energy saving and stability.