Sequence Control of Grain Dryer Machine using PLC

Abstract

In India 70 percent of the grain is sundried. This leads to increased dependence on the environment and loss of grain if improperly dried. The drying of grain by the conventional method cannot achieve the desired moisture level as per the user's requirement. The use of grain dryers will not only reduce the environmental dependence of the drying process but will also provide customizable moisture content in the grain according to user's demands. The storage of the grain requires is to be below at a particular moisture level else it would lead to the development of molds which will damage the grain. So to facilitate the storage requirement of the grain the dryers would dry the grain quickly and efficiently. A methodology is developed for drying the grains through the use of humidity sensing techniques and the use of PLC to control the entire drying procedure. Thus saving energy and catering to the user's requirements. The samples of Barley have been tested to verify the effectiveness of proposed methodology developed.