Our small conveyor belt dryer is unique in terms of hygienic design, “easy to cleane” and the great variety of applications it can be used for. All materials directly in contact with the product, are so-called Food Contact Materials (FCM), which means that the dryer is particularly suitable for drying, of foods and semilar products, which require maximum hygienic standard. Overall the dryer can be used for drying and heat treatment of all products, which can be contained by the belt. However, not liquid products, and products that can exhaust flammable gases. The dryers dimensions are H x W x L = 1,8 x 0,8 x 2,3 m.
The dryer is designed specifically for testdrying and smaller productions, wherefore the capacity is limited to 4 kg water evaporation per hour.
The entire front of the dryer can be opened. In this mode the conveyer belt can easily be lifted out for possible service and the entire drying chamber can be cleaned easily. Below is a picture of the dryer with the front door open.
The dryer is a convective belt dryer. The convective drying is carried out by recirculating warm and dry air through the belt, and the product lying on the belt to be dried. The belt is woven from Teflon coated glass fiber strands, which can be ordered with mesh sizes of 1, 2, 3, 4 and 5 mm. This is illustrated in the drawing below.
As the drying capacity is so small, fresh air is not supplied separately. By adjusting the exhaust air damper and the recirculation damper, you can adjust the air exchange to the desired level. Fresh air is sucked in together with the product.
The dryer can be supplied with a specially designed shredder, whereby products that tend to clump together and perhaps stick can be evenly distributed on the belt. See the pictures below.
The dryer can either be delivered with a very simple control without plc and touch screen, or with a more advanced control containing plc and touch screen.
DryingMate has, as something completely new, developed and supplied 2 modulebased conveyor belt dryers for modified plant proteins.
Our modular and zone divided drying system is a very simple belt dryer, but unique in terms of hygienic design, ease of cleaning and application possibilities. All materials that come into contact with the product are so-called Food Contact Materials (FKM), which makes it particularly suitable for drying, foods and similar products that require maximum hygienic standards.
To ensure sufficient drying capacity of the drying air, fresh air is continuously supplied from outside, and correspondingly, humid air is extracted from each module. There is a possibility of heat recovery between these two air streams. Both the recirculating air and the fresh air and exhaust air are continuously filtered to eliminate the risk of dust accumulation.
In order to ensure a uniform layer thickness, a so-called picker is installed in the inlet product box, and it is possible to select an extra picker to gently stir the product in each module.
You can store all the settings you want, so you can quickly recreate some settings that fit a specific product.
Benefits of 100% recirculation
For drying systems with 100% recirculation of the drying air, the air must be dehumidified. It can be done in two ways:
Sketch of the sorption principle. Ref: COTES A/S
DryingMate offers drying systems with 100% recirculation where dehumidification is done by exploiting standard sorptionaggregate.
The specific energy consumption of these solutions lies in the range 0.9 to 1.4 MWh / ton of water, which corresponds to standard open or semi-open drying processes and the energy can be supplied by electricity, gas, oil or other sources.
The solution can be used in drying processes, wiht drying temperatures in the range of about -20 ° C to about 100 ° C.
DryingMate cooperates with COTES A/S on new energy-optimized solutions for dehumidification of air from drying processes using sorptiontechnology.
For drying processes with drying temperatures below approx. 150 ° C and high water content in the exhaust air, it is worthwhile to analyze the economics of a heat pump solution for dehumidification and heating the drying air.
The heat pump is typically integrated in the drying process so that the heat pump evaporator (cooling coil) cools the exhaust air whereby the water is condensed and can be discharged. The cooled air is directed to the heat pump condenser (heating coil) that heats the air to the desired drying temperature and where the relative humidity is reduced.
The advantage of the heat pump solution compared to the sorptionsolution is that the energy cost under the right conditions is very low. In order for a heat pump solution to be competitive in energy costs, the specific energy consumption should typically be lower than 0.5 MWh / ton of water.