Geneq > Teaching Equipment > Measure & Regulation

Controlling and regulating continuous processes

Model EPP 501

This unit covers the following areas : REGULATING Vacuum regulation Flow rate regulation Temperature regulation Level regulation Each regulation loop consists of : One sensor One actuator One controller One perturbation CONTROLS Manual controls Sequential controls On/off controls COMMANDS Hand operated Computerized control OPERATING MODE Each regulation loop can be adjusted by hand or by computer. The whole process is a closed circuit, without any consumption of raw material. DIMENSIONS Length: 2500 mm Width: 800 mm Height: 2000 mm Weight: 300 kg

Applications

PID regulation Manual regulation On/off control Control of industrial components PC control Continuous process Study of control instruments Indicators – sensors – converters – transducers - controllers

Specifications

DESCRIPTION OF THE MAIN COMPONENTS 1- Heating tube – evaporator (borosilicate glass) 2- Condenser (borosilicate glass) 3- Light phase receiver : water 4- Heavy phase receiver : glycerine 5- 5 L-supply tank (polyethylene) 6- Electric preheater 7- Supply pumps 2 exchangeable centrifugal pumps: maintenance with turbine flow meter (0-10 L/h) 8- 3 receivers (borosilicate glass) one for the heavy phase on the bot tom condenser : 0.5 L one for the light phase af ter the condenser : 0.5 L one for the final receipt with the level sensors: 0.5 L 9- Re-circulating pump ( to the tank) Centrifugal pump with a water inlet connection piece 10- Two vacuum pumps 1) 3.9 m3/h – P=0.37 kW 2) 0.36 m3 /h for the final receipt 11- Vacuum regulat ion valve (stainless steel) 12- Six All-or-Nothing brass elect ro-valves for the level regulation

HEATING - Electric resistance heating - Temperature controller - Pt 100 in the heating tube: to control - Stainless steel perturbation coil, supplied with network water COLD WATER COOLING UNIT - Connected to the water network - For the condenser (2) - Rotameter - Control valve - For the heating tube coil - Rotameter - Control valve VACUUM UNIT - Vacuum pump - Control valve (12) - Pressure sensor - PID controller - 6 Electro-valves - The unit is used under atmospheric or reduced pressure - The vacuum pump is connected to the vacuum network. Connection to outside air is regulated by the control valve SUPPLYING UNIT - Tank containing a water/glycerine mixture. Capacity: 5 L - Centrifugal pump (with a spare pump for maintenance), the flow rate can be adjusted through a PC or locally. - Frequency control - Electric preheater - Injection into the heating tube SEPARATION UNIT - In the heating tube (1), the mixture is heated by an electric resistance - The water phase evaporates at a temperature corresponding to the pressure in the heating tube. 4 CONTROL PANELS Each one: - Is composed of all the elements relating to the security and to the protection of goods and people - Allows control of every component in the unit, manually or individually - Allows control of the equipment by PLC - Includes the interfaces and the software which allow working with a PC (not supplied) - Condensing into the condenser, which receives cold water for the network - Arrival in the recipient - The electro-valves and the level detectors control every stage - The heavy phase remains in liquid phase and leaves the heating tube by its lateral weir, towards its receiver RETURN TO THE TANK - Centrifugal pump controlled by the levels in the receivers (3-4) and by the solenoid valves - Cooling heat exchanger - Return to the tank (1) INSTRUMENTS - Temperature Temperature sensors - liquid - heating tube - vapour column - Flow rate Rotameter - cold water flow rate – exchanger (5) - turbine flow meter for the supply - Level Detectors of: - level in the heating tube - level in the receiver(high-low level) - Pressure Pressure in the unit connected to the vacuum regulation. AUTOMATION Industrial programmable controller 2 All-or-Nothing digital inlets (high and low level) 8 All-or-Nothing digital outlets (6 electro-valves, 1 pump and 1 vacuum pump) 1 digital outlet for connection to a PC permits the regulation of the level in the final receiver DISPOSITION OF THE UNIT TEMPERATURE • Control panel with synoptic • PID temperature controller with temperature indicator • Electric resistance: ON/OFF (only runs when the resistance is immersed) • Perturbator: a stainless steel coil with a manual adjustment valve PRESSURE • Control panel with synoptic • Piezoresistive sensor: –1/0bar • PID temperature controller with pressure indicator • Vacuum pump: ON/OFF • Perturbator: manual vacuum-breaker valve FLOW RATE • Control panel with synoptic • Supplying pump: ON/OFF • Turbine flow meter: 20-200 ml/min with indicator • Frequency variator • PID controller with a RS232 outlet for driving the PC • PC (not included) • Supervision software (under Windows 2000 or XP) • Perturbator: manual vacuum-breaker under the flow meter LEVEL • Control panel with synoptic • Industrial automate • Recirculating pump: ON/OFF • Control of the 6 electrovalves of the centrifugal pump and the little vacuum pump with data from high and low level sensors of the final receipt. • Permits the work by simulating: with synoptic and DIN plugs for the connection.