Design and Performance Analysis of MVR Low Level Liquid Waste Heat Pump Evaporation System
In order to study the feasibility of MVR technology in radioactive waste liquid,a thermodynamic mathematical model of the system was constructed,the process route of MVR low-emission waste liquid heat pump evaporation system was designed,and Aspen Plus simulation analysis was carried out.According to the simulation results,a test system bench was built and the system performance was analyzed.The influences of compressor pressure ratio,evaporation temperature and feed temperature on evaporation and heat transfer efficiency were studied.The results show that the designed MVR heat pump evaporation system runs continuously and stably,the average evaporation capacity of the system is 5.13 t/h,the average power consumption is 44.78 kW without processing 1 ton of simulated material liquid,the purification coefficient reaches 1.02×106,and the purification coefficient reaches.When the steam compressor pressure ratio is low,it is helpful to improve the energy-saving effect of the system,but the decrease of evaporation will increase the risk of corrosion of the system equipment.The evaporation capacity and heating coefficient of the system are greatly affected by the evaporation temperature,and show an upward trend with the increase of evaporation temperature.With the increase of the feed liquid temperature,the heat required by the secondary steam in the system to heat the feed liquid to the boiling point is reduced,and the energy consumption is reduced while the evaporation of the system is increased.
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