MULTI FUNCTIONAL CONCENTRATION PILOT PLANT.

INTRODUCTION

This plant consists of a double-effect falling-fi lm evaporator
and it is designed to concentrate juices of low viscosity.
The water evaporated in the fi rst stage is used as heating
steam for the second stage, with a consequent improvement
of process efficiency as regards the steam consumption.

TRAINING PROGRAM
This unit enables to deepen
the following issues:
• Mass balance
• Heat balance
• Determination of overall heat exchange coefficient
• Determination of optimum operating conditions
• Automatic PID control
• Process supervision

TECHNICAL SPECIFICATION
• Framework of AISI 304 stainless steel
• Max. feeding: 20 kg/h (higher flow rates on demand)
• Feed tank of borosilicate glass, with capacity of 25 l
• Tank of borosilicate glass, with capacity of 10 l, for storing
the concentrated product
• Tank of borosilicate glass, with capacity of 10 l, for storing
solvent
• 1st-stage evaporator of AISI 304 stainless steel, with
exchange surface of 0.25 m²
• 2nd-stage evaporator of AISI 304 stainless steel, with
exchange surface of 0.25 m²
• Shell-and-tube condenser of AISI 304 stainless steel, with
exchange surface of 1 m²
• 2 water traps of AISI 304 stainless steel for the fi rst and
second stages

2 graduated tanks of borosilicate glass for condensate, with
capacity of 1 l
• Feed metering pump, with double body of AISI 316 stainless
steel, flow rate of 0 to 30 l/h: it can be driven by a pneumatic
signal of 0.2 to 1 bar
• Liquid-ring vacuum pump, P = 0.7 kW, provided with air/
water separator
• Screw pump of AISI 316 stainless steel and Viton, for
recycling the product in the 2nd stage
• Flowmeter of steel and glass, range of 30 to 300 l/h, for
measuring the flow rate of water feeding the condenser
• 9 electronic temperature indicators
• Nine Pt100 thermoresistances with sheath of AISI 316
stainless steel
• Pneumatic valve of AISI 316 stainless steel, Cv = 0.32, for
controlling the 1st-stage steam
• Pneumatic valve of AISI 316 stainless steel, Cv = 0.32, for
controlling the 2nd-stage level
• 3 electropneumatic converters
• Switchboard with protection degree IP55 complying with EC
standards and including a differential circuit breaker and a schematic diagram of the plant
• Electronic transmitter of 1st-stage level with capacitive sensor, output signal of 4 to 20 mA, accuracy: ± 0.25%
• Electronic transmitter of 2nd-stage level with capacitive sensor, output signal of 4 to 20 mA, accuracy: ± 0.25%
• Electronic transmitter of steam flow rate
• Microprocessor PID controller
• Electronic transmitter of residual pressure with range of 0 to 1000 mbar, output signal of 4 to 20 mA, accuracy: ± 0.1%
• Electropneumatic converter; range: 4 to 20 mA / 0.2 to 1 bar, accuracy: ± 1%
• Microprocessor PID controller accuracy: ± 0.1%
• Supervision software this software runs in Windows and it is designed to control ON-OFF signals, analog signals coming from the controller, real-time trend
and historical trend
Dimensions: 2350 × 800 × 2500 mm
Weight: 520 kg

Supplied with THEORETICAL – EXPERIMENTAL HANDBOOK