Mineral grain dryers on wood, Dnipropetrovsk region.

Grain dryers on alternative energy sources, namely - grain dryers on straw, shavings, husks, and biowaste were known in Ukraine until recently. The company Prominvestservis presents a novelty - mine grain dryers, which are equipped with burners for natural gas, propane-butane, diesel (furnace) fuel, and heat generators for firewood (husk). Heat generators on solid fuel are made of refractory brick, and their internal metal structures consist of heat-resistant cast iron, which determines their durability and reliability. The well-thought-out design of the heat generator on wood (husk), characterized by high inertness, allows you to maintain a constant temperature within the range of 40 ― 110 °С. If it is necessary to stop the drying process, the heat generator of the grain dryer is switched from the combustion mode to the smoldering mode, and the excess heat is discharged into the chimney.

Grain dryers with wood-fired heat generators (luzge)

Grain drying takes place in 70% of the volume of the mine and cooling in 30% of the grain dryer mine, after which the subsequent long-term storage of the grain is possible. The external air, which has passed through the cooling section, takes heat from the hot dry grain and is mixed with the main volume of the drying air, which allows you to save fuel and electricity. Also, it is possible to dry in a drying column grain dryer without cooling, to increase productivity by 7-10%, with subsequent cooling insilose. All wood-fired grain dryers can be equipped with a gas (diesel) burner and a wood-fired heat generator at the same time. Beginning with model 40, wood-fired grain dryers, already in the basic version, are equipped with cycloventilators for the disposal of dust and debris from the air used during drying. Wood-fired grain dryer is the most cost-effective tool for drying grain on the Ukrainian market.

Grain dryers with natural gas, propane, diesel burners

These grain dryers are one of the highest quality products on the market of grain drying equipment. This high-tech grain dryer makes maximum use of the heat recovery process spent on heating and drying the grain mass. Kepler Weber grain dryers are characterized by a simple and reliable design of the grain drying column and unloading mechanism. They are equipped with aspiration cycloventilators for the disposal of dust and air from the exhausted air. Grain dryers are intended for drying all types of grain, leguminous, oil crops, as well as seed material. The grain dryer can be of a combined design - with a gas (diesel) burner and a wood (husk) heat generator.

Drying mine

It is a construction of modular panels made of galvanized steel 275 g/m². The drying column can consist of visors or grooves perpendicular to the grain flow.

Ø Mine with visors

Grain drying shafts with visor elements, which are traditional for most manufacturers, have become the most common. Such a design has been refined for decades in order to increase the uniformity of drying over the entire volume of the mine, and basically it can differ only in the degree of protection of elements from corrosion or the quality of the material used. The type of material from which the elements are made and its thickness determine the service life of the mine. To increase the uniformity of grain drying, the mine should be sufficiently high. In addition, it is good to install buffer tanks at the entrance and exit of the grain drying unit. These containers will accumulate grain for uniform and stable operation of the dryer, and in addition, they will contribute to the mixing of grain and obtaining the same moisture content of the grain at the entrance and exit from the drying unit.

As experience shows, one of the main disadvantages of a mine with visor elements is that the grain that passes through such a mine must be sufficiently well cleaned, especially from large contaminated ones. Grain is poured into the drying shaft through the hole in the center of the shaft, and when the dryer is full, it is poured onto the top of the grain prism. At the same time, large impurities roll to the base of this prism, i.e. to the walls of the mine, where it can accumulate and does not pass between the visor elements. Peculiar "nests" appear, through which hot air is constantly blown. The impurities dry out, and when the slightest spark appears, their ignition may occur. Most often, the fire starts in the upper part of the dryer.

Ø Mine with grooves

To reduce the fire hazard, especially in dryers that do not use heat exchangers, a shaft with so-called groove elements was developed. Manufacturers also call such a mine self-cleaning. In such a mine, there is much less chance of large contaminated particles hanging on the elements of the mine, for such a mine, the presence of up to 4% of contaminated grains is allowed. Most often, this type of mine is used in dryers manufactured in Brazil and Argentina, working on firewood orsunflower husks or rice. Since these dryers use an open flame, because they work without a heat exchanger, then the manufacturer, in order to further increase fire safety, obliges the user to ensure a high speed of passage of grain through the dryer during the drying process.

Fans

The dryers are equipped with high-performance axial fans with adjustable blades made of cast aluminum, which allow you to adjust the power of suction and the emission of solid particles, with a low noise level.

Control panel

The electronic monitoring system allows you to control the temperature of the drying air and the grain discharge flow. Simple management optimizes and provides reliable and

safe work.

Unloading system

Ø Loading with inclined blades

It is actuated by a motor-reducer with a frequency regulator, and a regulator of the amplitude of the movement of the blades at the exit from the mine. A fine adjustment of the unloading is achieved in accordance with the type of dry grain. The system can work at a high level of product contamination.

Ø Pneumatic unloading

It is controlled using a timer, which activates a pneumatic piston, releasing the product in batches, ensuring uniform cleaning of the visors. Такая выгрузка applies to the line of dryers with visors.

Options:
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Ø Set for drying grain in an unfilled mine

With the installation of this kit in a mine with canopies, it is possible to carry out drying in small volumes of only 1/3 of the total product in the tower.

Ø Cycloventilator system for dust removal

It consists of cyclones located behind the fans, which collect dust particles blown out of the grain during the drying process and dispose of them.

Ø Extended Control Panel

An alternative for drying control, responsible for the following:

· monitoring and control of temperature and unloading;

· humidity control;

· blocking of fans and unloading;

· Memory for 15 working days;

· Security alarm.

Ø NETWORK ADMINISTRATOR kit

By communicating with the control panel controller via the Internet, you can get a visualization of the drying data from a remote location for quick decision-making. Data storage is ensured and the sequence of operations is tracked.

Ø System for controlling the temperature of the drying agent for heat generators at

biofuel

The system is used in biofuel heat generators and consists of a mechanical controller connected to external air supply louvers, controlled by temperature sensors to control and adjust the temperature of the drying agent.

Ø Stairs and platforms

На grain dryers of medium and large sizes can be equipped with internal and external access ladders that meet technical safety requirements with anti-slip floors, bumpers-fences for feet, railings and intermediate platforms.

Ø Sources of thermal energy

Dryers are intended for use with the following sources of energy:

· gas burners (natural or LPG liquefied gas);

· steam heat exchanger;

· diesel burners with a heat exchanger;

· heat generators for biofuel (firewood, husk, pellets).