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 Products:  Process Engineering » Thermal Process Engineering » Drying and Evaporation » CE 130
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CE 130: Convection Drying

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Convection Drying

Convection Drying Convection Drying Convection Drying

Product Details

Technical Description
Convection dryers are often used for drying solids in food technology. The CE 130 can be used to investigate and demonstrate the process of convection drying of granular solids. Four corrosion resistant removable trays are available for drying the solid. They are positioned in a drying channel. The trays containing the solid to be dried are exposed to an airflow in the channel. The airflow heats the solid and also removes the moisture that is released. Airflow rate can be controlled by adjusting the speed of a fan. Air temperature is controlled with an adjustable heater. The transparent door in the drying channel allows the drying process to be observed. Digital scales can be used to follow the changes in weight of the solid due to evaporation or vaporisation of moisture during operation. The air temperature and the relative humidity of the air are recorded and digitally displayed by combined temperature and humidity sensors before and after the airflow passes over the solid sample. The hand-held anemometer provided, measures airflow rate. 
The relevant measured parameters can be transferred directly to a PC, where they can then be further processed.

Learning Objectives / Experiments
- Influence of air temperature and humidity on drying intensity
- Measurement of drying curves with constant external conditions
- Determination of drying speed with different air parameters and different solid properties
- Representation of drying experiments in a h-ω diagram
- Evaluation of drying processes using energy and mass balances

* Convection dryer for drying experiments on granular substances
* Plotting of drying curves
* LabView software for data acquisition
[1] Tray drier for investigating convection drying of solids
[2] Drying on 4 corrosion resistant trays in a drying channel with an airflow
[3] Adjustment of airflow rate via speed of axial blower
[4] Air heating with adjustable finned heater
[5] Digital scale for recording the change of weight during drying
[6] Battery operated hand-held anemometer for measuring the airflow rate
[7] 2 combined humidity and temperature sensors with digital displays
[8] Digital stopwatch, battery operated
[9] LabView software for data acquisition under Windows XP

Technical Data
Flow channel:
- length: 2340mm (with fan)
- internal dimensions: 350x350mm
4 drying trays: 400x300x15mm
- power: 33W
- max. output: 700m³/h
- max. speed: 950rpm
7-stage finned heater:
- power 0.5...3.5kW
- with adjustable temperature limiter
- measuring range: 0…6200g
- resolution: 0,1g
- measuring range: 0...10m/s
- resolution: 0.01m/s
Application temperature: 0…50°C
Measuring ranges of sensors:
- humidity: 0...100% rel.
- temperature: 0…100°C

Dimensions and Weight
l x w x h : 2340 x 750 x 1350 mm
Weight : approx. 125 kg

230V, 50Hz, 1 phase or 230V, 60Hz, 3 phase

Scope of Delivery
1 drying channel on base frame, 1 digital scale, 1 hand-held anemometer, 1 stopwatch, 4 drying trays, 1 LabView software CD + USB cable, 1 set of instructional material

Order Details
083.13000  CE 130  Convection Drying

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
E-Mail:   |  Internet:

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