Rising film evaporation Concentration of temperature-sensitive solutions Features - rising film evaporator for increasing the concentration of temperature-sensitive solutions - hygienic operation due to carefully selected materials such as stainless steel and glass - cleaning possible while installed - counterflow process Learning objectives/experiments - fundamental principle of film evaporation for increasing the concentration of temperature-sensitive solutions - investigation of the variables influencing the solid concentration in the solution - influence of pressure and feed flow rate on the separating process - influence of flow rate and pressure of the heating steam on the separating process - investigation of the variables influencing the energy efficiency of the process - energy balances at heat exchangers - system cleaning while installed Specification [1] rising film evaporator for increasing the concentration of temperature-sensitive solutions [2] stainless steel steam-heated single pipe evaporator [3] control valve for adjustment of steam pressure via PID controller [4] water jet pump and vacuum controller to reduce the evaporation temperature [5] separation of concentrated solution and evaporated solvent using glass cyclone [6] glass condenser for condensation of removed solvent vapour [7] stainless steel feed tank [8] glass tanks for concentrate and condensate [9] measurement of flow rate, pressure and temperature [10] steam supply from laboratory network or CE 715.01 Technical data Rising film evaporator - heat transfer surface: approx. 0,08m2 - length: approx. 1,2m Control valve: Kvs value: 0,4m3/h Water jet pump - final vacuum: approx. 100mbar - flow rate: approx. 90L/min Vacuum controller: -100...0kPa Condenser for solvent vapour - heat transfer surface: approx. 0,2m2 Tanks - feed: approx. 30L - concentrate, condensate: approx. 10L each Measuring ranges - temperature: 7x 0...170°C - pressure: -1...1bar; 0...6bar (abs); 0...10bar - flow rate: 2...36L/h; 0...1000L/h 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1420x750x2640mm Weight: approx. 300kg