Design and Experimental Analysis of Mechanical Vapour Recompression(MVR)System Based on Surface Free Evaporation
To reduce scaling in the liquid-liquid heat transfer process inside the evaporator,a spray-type mass transfer and heat transfer process model is proposed.This allows the solution to directly contact the heat medium surface and produce a free evaporation process,which is particularly suitable for evaporation of high-concentration and easily scaling solutions.After pilot-scale test of the plant,the system's overall performance was comprehensively evaluated and analyzed,including thermal efficiency,evaporation effect,energy consumption,etc.The correctness of the mathematical model for the process was verified,and the energy consumption of the system was reduced to 54.25 kWh/t,with a coefficient of performance(COP)of 13,thus effectively solving the scaling problem.