Stationary drying plants AgroDry ®

For the constructive layout of your drying plant, there are numerous variations, which can be individually arranged. You will receive an optimum design for your application with the adequate components in compliance with your wishes. Generally applies for all variants: The pourable drying product is conveyed into the storing tank (1), flows due to gravity through the drying (2) and cooling elements (3) and is then discharged at intervals by the discharge unit (4) into the discharge hopper (5). There are the most various alternatives for the necessary air heating, according to which the types...

Construction with centro separator and recirculating air system for active heat recovery. Air heating/air duct system In this example, the air is heated by means of a gas line burner. Furthermore, not only the exhaust air from the cooling zone, but by means of a separate recirculation fan (1) also the exhaust air (and thus the energy in it) from the lower drying elements is recycled. The recirculation airflow is blocked during product discharge by using a pneumatic recirculation air flap (2) and so the dust in the product is restrained. Essential for the percentage of the total air volume which...

Innovative STELA Biturbo technology The innovative air duct system of the STELA Biturbo technology reduces the required hot air quantity by up to 40 % and thus the specific energy consumption compared with conventional drying plants with active heat recovery. The fresh air (1) is absorbed in the lower area of the drying plant, heated up by a gas line burner (2) and together with preheated supply air delivered from the cooling zone area (3) to the lower drying section, the dry product area (4). The hot air temperature can be adjusted completely independent of the upper temperature zone. The higher...

Innovative STELA Biturbo technology with oil heating Besides gas heating, air heating by air heater (1) with oil fan burner (2) can be realized as well. In order to guarantee also in this case a compact and mainly energy-efficient functionality, STELA Laxhuber turned their attention especially to the positions of both direct air heaters when designing and constructing the air duct system. Thus they ensure that the thermal energy demand is from 0.922 kWh/kgH2o as well. This results in an oil consumption of 21.7 litres for the drying of one tonne of wet maize with a moisture reduction of 35 % to...

Drying principle The drying product is conducted through the dryer by gravity from above to below. The heat and exhaust ducts are arranged horizontally in the vertical product ducts. The optimized roof form of these channels guarantees uniform settling of the product. The entire lengths of the roof ducts are open on the bottom. The hot air flows over the front of the hot air ducts into the columns and then flows through the product batch. This heats the product and passes its moisture on to the circulating air to dry it. In return, the air cools down and is saturated until the product-dependent...

Product discharge system Dust reduction with pneumatic flap control or centro separator Pneumatic discharge The electronically controlled pneumatic discharge has established itself in practice, especially for the processing of maize. Large product quantities are discharged promptly in short intervals. Thus the whole product column slides down continuously. The function comes up to that of a multiple slide, which locks respectively opens the area between the roofs. An adjustment to various grain sizes is possible from outside without any problems. We all are very concerned about environment. Legal...

Hot air generation Direct air heaters Indirect air heaters Hot-water heat exchangers Direct air heater STELA direct air heaters are used for firing oil or gas fuels. They are applied for heating up the air for STELA dryers as well as for other industrial products, for example in the brick making industry. Hot air generation with direct air heater The direct air heater consists of an outer shell, an intermediate shell against radiation losses and a perforated combustion chamber made of highly heat-resistant steel, which is placed centrically in the shell. The hot exhaust gases are mixed with the...

Fan burner Gas line burner Biomass combustion Oil or gas burners We only use quality burners of the leading European manufacturers for generating hot air with fan burners. These products are solely burners which guarantee low emission values and permanent, safe operation. Depending on the heating medium and the requirements regarding control behaviour, various designs are available Optional designs: • Stage, gliding stage and modulating control • Design with exhaust gas reduction (Low-Nox design) Heating medium: • Heating oil • Heavy fuel • Natural gas • Liquefied gas • Biodiesel • Biogas Gas...

Drying and cooling elements Fan and air system Our drying and cooling elements are completely made of highquality aluminium. The requested dryer capacity determines the number of the required elements. If necessary, several element columns can be placed side by side. STELA offers a multitude of element sizes in order to consider constructional specifications, especially for inside installations. Depending on the product, the plants are optimized for roof geometries, product bags for light products etc. – STELA focuses their expertise on your project. The fans provide air movement within the product...

Control technology With our own control and electrical department, we can flexibly address customer requirements. With the highest quality claim, we offer you a broadly diversified portfolio of electrical engineering, automation technology, process visualization, maintenance, switchgear construction and electronic MSR assembly from one location. Our services include: Set-up and wiring of EMC-appropriate switchgears; power distribution; low-voltage distribution up to 3200 A; measurement, regulating and control cabinets; PLC and PLS cabinets, control and display panels; production in accordance...