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Grain cleaner and dryer in one machine? Check it how it works




Before selling, most cereals and legumes must not only be dried, but also cleaned to remove any residues and dust. Having a clean final product ready for the market offers several advantages: specific machinery or equipment is often used to clean the grain before or after drying. However, in order to save both time and production costs, while always maintaining high quality, it is good to focus on machinery that provides both the drying and cleaning process. But how does it work? Mecmar explains it to you in this article.

Importance of grain cleaning

Following the harvest, impurities and dirt of various kinds are typically collected with the grains, affecting the quality of the cereal itself. Not only that: even dryers, if not well equipped to remove these elements, can be affected. All residues are extra elements to dry (energy loss) and elements of non-homogeneous size compared to the collected grains. This implies that the efficiency and then even the operation of the machine are compromised, with the consequence of requiring longer drying times, affecting the homogeneity of drying and increasing the need for maintenance.

Among the impurities collected together with the cereals there may be straws, leaves, residues that have shorter drying times than the grains: during the treatment, these elements dry quickly, reaching levels of dryness that could cause a fire risk.

Everyone knows that dirt brings with it unwelcome elements, which affect conservation. A clean grain is pleasant to the eye, to the touch and to the smell. Cleaning grains is fundamental: in this way impurities are eliminated in advance and the risks of possible internal fires in the dryer, caused by the combustion of these powders, are also eliminated. But there is another essential aspect: the cleaning of the cereal translates into a higher selling price on the market.

Two processes, one solution

Depending on how the product looks after the harvest, it will be advisable to remove:

  • Small elements
  • Medium elements
  • Heavy elements
  • Impurities

On the market you can find screen or rotary cleaners, but also filters designed to perform this action in an optimal and autonomous way.

For a long time, to proceed with the cleaning and drying process of the cereals separate equipment was used: they proceeded at different times to complete the processes of cleaning and drying. However, this implies a greater waste of time as well as a higher cost, for the purchase of two different machines and for the maintenance. Furthermore, as can be easily understood, two machines also require a larger space, which can make the corporate layout less functional.

Today the most advanced solutions provide for cleaning and drying cereals with a single machine. This is possible thanks to the integration of the basic dryer with a special vacuum cleaner for cleaning the product. The vacuum cleaner is mounted on the dryer and adjusted to extract the thinnest parts and also the grains extraneous to the product to dry.

Combining the cleaning phase within the drying phase it is possible not only with fixed systems, such as tower dryers, but also with portable and smaller ones, such as mobile grain dryers.

Although before proceeding with drying it is always recommended to clean the grain with a dedicated machine, Mecmar grain dryers have been developed to allow further cleaning of the product during the drying treatment, thanks to specific technical solutions. For several years, the technology of Mecmar grain dryers has integrated solutions for cleaning the product as standard equipment, on all machines, but also as an optional, for an even greater cleaning effect.

The standard equipment includes a gravitational cleaner connected to the central tube, with a grid that allows to separate the coarse elements from the cereal. By mounting grids of different sizes, it is possible to separate these particles from the product.

As an optional equipment can be provided a suction system for the removal of dust, which is taken from the upper point of the auger (point where the recirculation of the cereal leads to a natural separation of the dust). An extractor hood connected to a high-efficiency fan is then inserted to remove the dust that can be either brought to the ground and then ejected or separated by a cyclone.

What are the advantages?

The advantages deriving from the use of a solution that cleans and dries cereals are numerous: first, there is an increase in the quality of the final product. Because of what we have already said, there is also the advantage of a significant reduction in the time required to have a perfectly clean and dried finished product, ready for placing on the market.

A technologically advanced grain dryer and cleaner also require very little maintenance, while maintaining great efficiency over time.

The product that can be obtained with these solutions is a homogeneously treated cereal with no damage caused by drying, no residues of dust or other. The quality of the finished product will be excellent, and, thanks to the process optimization, it will also achieve a maximization of earnings.


Cleaning and drying are two distinct but complementary phases, both essential to obtain a quality final product. Mecmar, a specialist for decades in the construction of grain dryers, has in its range complete solutions that proceed independently to the two phases in a single process, thanks to a specially designed suction system.

If you want to learn more about the cereal drying systems offered by Mecmar and get all the benefits they can guarantee, do not hesitate to contact us: our experts will be ready to answer your questions and meet your needs.£$Download the calculator

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