Agitated Vacuum Pan Dryers

Mitchell Dryers Limited

The Agitated Vacuum Pan Dryer is oneof the most versatile in the Mitchellrange and is widely used for batchdrying of slurries, solutions, filtercakes, damp powders and crystallineproducts. The dryer essentiallycomprises a flat bottomed, jacketed,cylindrical vessel arranged for hotwater, steam or thermal oil heating.Dryers are available in the capacityrange 75-2135 litres incorporatingoptional features as noted.

Dryer FeedWet material is fed into the dryer through a hinged,counter balanced top cover or a hinged accessmanhole dependent upon dryer capacity andlocation. Access into the interior of the dryer forcleaning is readily available through the same topcover or manhole.

Product DischargeThe discharge door is fitted in the lower side wallof the vessel and product discharge is effected byuse of the agitator. Discharge time is dependentupon material flow characteristics, the agitatordesign and its speed of rotation.

AgitatorThe rotating agitator arm sweeps all the internalheat transfer surfaces and its gentle, effectiveaction continually presents fresh material to theheating surfaces and facilitates homogeneousmixing. A choice of agitator designs which can bearranged with or without heating is available to suitthe material characteristics and processrequirements.

Vacuum Pan Dryer for Fine Chemicals

Size No.6 Vacuum Pan Dryer for Pharmaceuticals

Optional features include:

❑✔Vacuum or atmospheric operation

❑✔Agitator drive from above or below pan body

❑✔Fixed or variable speed agitator drive

❑✔Stuffing box or mechanical drive shaft seal

❑✔Breaker bar to increase range of application

❑✔Internal or external dust filters to suit process

❑✔Nitrogen purge facility

❑✔Automatic discharge

❑✔Counterbalanced top cover or access manhole

❑✔Fixed body with base lowering facility and support trolley

❑✔Adjustable variable speed lump breaker

❑✔Agitator arranged with or without heating facility

❑✔Cleaning in place system

Dimensions and Capacities basic unit

Materials of construction

Normally all contact parts in appropriate grades ofstainless steel, other alloys and metals available. Jacketin stainless steel or painted mild steel. Rubber/PTFEseals and gaskets to suit application.

Finish

Vessel internal and external metal surfaces polished toany required finish. Carbon steel components primedand painted to suit.

Design Codes

Normal design is to BS 5500 or ASME VIII.Other codes can be accommodated.GMP Standards

Operating Range

Temperature: –10 to +150˚CVessel Pressure: Full vacuumJacket Pressure: Up to 6 bar g

Service Requirement Options

Electrical: To suit locationHeating: Water/oil/steamCooling: Water/oil/brineNitrogen: 1.0 bar gaugeClean water/solvent: for mechanical seal optionCIP agents: for cleaning option

Dryer Approx.dimensions mm Heating ChargeNo A B C D E area sq.m. Litres

1 780 380 630 1220 1500 0.80 752 1010 380 720 1520 1600 1.25 1333 1160 380 830 1830 1680 1.58 1814 1330 530 920 1980 1850 2.32 3545 1500 690 1010 2130 2190 3.44 6606 1650 690 1100 2440 2370 4.02 8307 1960 690 1300 2740 2580 5.15 12008 2130 700 1400 3050 2750 5.93 14109 2280 700 1500 3200 2900 6.65 163510 2600 700 1500 3350 3000 8.20 2135

Mitchell Dryers LimitedDenton HolmeCarlisle CumbriaCA2 5DUEngland

Tel: (01228) 534433Fax: (01228) 633555eMail: info@mitchell-dryers.co.uk www.mitchell-dryers.co.uk

© 2002 Mitchell Dryers Ltd

MD35/A

Agitated Vacuum Pan Dryers

Test Centre

Mitchell Dryers manufacturing experience datesback to 1859. More specifically, our Test Centrehas accumulated test results over thirty years ona wide range of drying applications. The TestCentre is equipped with our complete range ofdryers some of which are illustrated here. Ourfacilities are available to process products tomatch client requirements.

Mitchell Dryers offer a range of four different typesof vacuum dryer:

✦ Vacuum shelf dryer✦ Double cone vacuum dryer✦ Agitated vacuum pan dryer✦ Continuous vacuum band dryer

Choice of the most appropriate type of dryer for aparticular application will depend on factors suchas:

✦ Production requirement✦ Physical form of feed material✦ Material handling characteristics✦ Final product form

✦ Efficient low temperature drying✦ Choice of heating medium✦ Standard range of sizes✦ Solvent recovery✦ Nitrogen purge✦ Interlocks and guards to HSE requirements✦ Manufactured to BS 5500 or ASME VIII✦ Built to GMP standards✦ Supply of complete dryer/vacuum package

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