the grain is for malt: handled very gently and dried under specific conditions
Coinciding with the completion of a project by Lantmännen in Hargshamn, Cimbria commenced a similar installation of a grain terminal for Lantmännen in Hammenhög in the south of Sweden. The system in Hammenhög consists of an intake system with pre-cleaning and silos for storage of wet grain before drying, an ECO-Logic™ dryer, storage silos and connection to existing flatbed storage.
A major part of the incoming grain is for malt, with the grain being handled very gently and dried under specific conditions at lower drying temperatures in order not to damage the characteristics of the grain. After drying, the malt grain is cleaned to a very high level of purity.
The dryer in Hammenhög is the new ECO-Logic™ dryer, which represents absolute state-of-the-art technology and is Cimbria’s latest continuous flow dryer. The plant is equipped with the latest generation of automatic operation control and process control, as this is an essential part of the drying process. In addition, a variable number of cooling sections and dust extractors are highlighted in the integrated tangentially-acting dust guards. The dryer is heated with water from a boiler plant fired with renewable fuel.
The fans for aspiration are equipped with frequency converters, such that the power consumption of the large fans is controlled according to exact requirements. The dryer is equipped with automatic control of the airflow, which can be infinitely adjusted depending on the product, as well as the temperature and humidity of the grain and dry air.
Design and technical features: Intelligent drying with optimum energy consumption.
The ECO-Logic™ dryer was introduced to Cimbria’s customers at the Agritechnica exhibition in 2017, where it was one of Cimbria’s main exhibits.
For customers, gentle and uniform drying with optimum energy consumption is essential, in addition to a high level of automation and remote control, low dust emission and low noise levels. These requirements are augmented by demands for high reliability and availability, as the dryer has to operate without interruption during the harvest and drying season. A continuous flow dryer consists in principle of three sections: the heating section, the dryer column and the exhaust section. In the heating section the ambient air is heated and mixed with recirculated air and then led into the drying column via hot air ducts. In the drying column, the heat of the drying air evaporates the moisture in the grain, whilst at the exhaust section the drying air is expelled through the exhaust fan and dust separation devices.
The main objective in the heating section is to obtain a completely uniform temperature at the dryer column inlet. For the ECO-Logic™ dryer, a hot air mixer ensures, to guarantee uniform, accurate and gentle drying of the grain.
The discharge device on the dryer column ensures an even discharge of the grain across the entire outlet area of the dryer. The discharge principle is based on Cimbria’s well-known volumetric discharge system, which provides a very accurate indication of capacity, since each discharge has a certain fixed volume. High grain quality is maintained, thus assuring good germination capacity and grain quality.
The ECO-Logic™ grain mixing device has been designed to redirect the hottest grain so that it changes place with the colder and wetter grain at the colder part of the dryer in order to ensure even drying of the grain.
A prerequisite for achieving high dryer efficiency is to ensure that the humidity level of the exhaust air is as high as possible and the volume flow of the exhaust air is as low as possible. With very even temperature distribution and accurate control of the dryer, the drying temperature can be increased and kept at a high level without damaging the grain, thus ensuring high humidity in the exhaust air and hence high efficiency.
In general, the new dryer is approximately 20 % more efficient than a traditional dryer such as the A-dryer and 10 % more efficient than a dryer like the ECO-Master.
The ECO-Logic™ is provided with centrifugal fans with limited noise emission. For control of dust emission, a dust guard is designed to capture the dust particles, thus ensuring that the ECO-Logic™ dryer complies with environmental regulations.
The structural design of the dryer complies with Eurocodes, whilst manufacture of the structural steel is carried out according to EN1090.
New Eco-logic dryers for Lantmännen Sweden