Laboratory Atomization

Laboratory Atomization

Pilot Unit Specification of

• Industrial instrumentation
• Made of AISI 316L stainless steel and borosilicate glass
• Rigid process tubing

Principle

• Drying by atomization consists feeding the liquid to dehydrate in a form of a thin spray to obtain a powdery solid.
• The solution is injected through an atomisation nozzle, which produce a spray made of very little drops.
• A very hot air flow evaporates the solvent and carries away the solid powder into a cyclone.
• The cyclone separates the solid particles from the drying airflow, which goes back outside the pilot unit.
• The solid is collected at the base of the cyclone in a glass receiver.

Teaching Objectives of Laboratory Atomization

• Atomization of a solution.
• Influence of the drying air temperature.
• Influence of the drying air flow rate.
• Influence of the atomisation air flow rate.
• Influence of the solution feeding flow rate.

• Thermal balance.
• Mass balance.

Technical specifications

• Feed solution glass flask.
• Feed solution variable flow rate peristaltic pump.
• Drying air variable flow rate centrifugal fan, made of steel.
• Drying hot air tunnel made of AISI 304L stainless steel equipped with a variable power heating resistance.
• Atomization tower made of borosilicate glass with glass flask receiver.
• Atomization nozzle with air feeding and jet pump cleaning system using cyclic air.
• Air - solid separation using a borosilicate glass cyclone with glass flask receiver.
• Outside pilot unit air duct.

Instrumentation :

• Feeding air flow rate (located at the cold part) using the differential pressure measurement of an orifice plate and an electronic transducer. Atomization air flow rate measurement using a float type flow meter and its adjustment needle valve (nozzle air feeding).
• Jet pump cleaning solenoid valve of the atomization nozzle.
• Temperature safety switch of the air heating resistance.

Electric cabinet including :

• Drying air flow rate indicator.
• Atomization tower temperature indicator using Pt100 Ω type sensor.
• Drying air temperature controller.
• Drying air fan variable speed driver.
• Solution feeding pump variable speed driver.
• Jet pump cleaning electronic timer of the atomization nozzle.

Option :

• Two relative humidity measurement probes of the drying air inlet and outlet with two channel indicator.

Dimensions and weight

• 1.95 m x 0.7 m x 2.6 m ~ 150 kg.

Essential requirements

• 400 V / 50 Hz / Three-phase:8 kW.
• Compressed air, 6 bar:5 Nm3/h
• Vent system.