This unit consists of a falling-film evaporator equipped with a shell-and-tube condenser. The evaporator is fed by a metering pump and it operates under vacuum thanks to a liquid-ring vacuum pump. The concentrated product and the evaporated solvent are collected into two glass tanks. The automated version includes a PID controller that enables to control automatically the flow rate of steam sent to the evaporator and the vacuum degree of the plant.
TRAINING PROGRAM
This unit enables to deepen the following issues:
• Mass balances
• Energy balances
• Determination of heat transfer coefficient
• Optimization of evaporation process
• Automatic flow and vacuum control by PID controller
• Plant supervision by P.C.
TECHNICAL SPECIFICATIONS:
• Framework of AISI 304 stainless steel with castors
• Metering pump of AISI 316 stainless steel, flow rate: 0-24 l/h
• Feeding tank of borosilicate glass with capacity of 25 l
• Tank of borosilicate glass, with capacity of 10 l, for collecting the concentrated product
• Tank of borosilicate glass, with capacity of 10 l, for collecting the condensed solvent
• Steam trap of AISI 304 stainless steel
• Graduated tank of borosilicate glass, with capacity of 1 l, for measuring the condensate
• Bourdon pressure gauge, with range of 0 to 6 bar
• Bourdon pressure gauge, with range of 0 to 1.6 bar
• Bourdon vacuum gauge, with range of 0 to -1 bar
• Falling-film shell-and-tube evaporator of AISI 304 stainless steel, with exchange surface of 0.27 m2
• Shell-and-tube condenser of AISI 304 stainless steel, with exchange surface of 1.1 m2
• Tube-in-tube heat exchanger of AISI 304 stainless steel
• Pneumatic valve of AISI 316 stainless steel, Cv = 0.32, for the control of steam flow rate
• Calibrated diaphragm of stainless steel with AISI 316 differential pressure transmitter for measuring the steam
flow rate
• 6 thermoresistances Pt 100 with sheath of AISI 316 stainless steel
• 6 electronic temperature indicators
• Flowmeter of glass and steel, with range of 30 to 300 l/h
• Liquid-ring vacuum pump, P = 0.7 kW, equipped with air/water separator and solenoid valve for feeding water
• Piping and valves of AISI 304 and AISI 316 stainless steel
• Switchboard IP55, complying with EC conformity mark, including plant synoptic and ELCB
• Emergency button
Besides being provided with all the characteristics, this model also includes the following additional items:
• Residual pressure electronic transmitter of stainless steel and range of 0 to 1000 mbar
• Interface for the connection with a PC included in the switchboard
• Data acquisition software for Windows
Besides being provided with all the characteristics, this model also includes the following additional items:
• Pneumatic valve of AISI 316 stainless steel, Cv = 2.5, for controlling the working pressure
• Residual pressure electronic transmitter of stainless steel and range of 0 to 1000 mbar, 4-20 mA output signal
• Microprocessor digital PID controller with serial card
• Supervision software for Windows: it enables to control ON-OFF signals, analog signals coming from PID controller, real-time trend and historical trend
