The horizontal screw dryer is an industrial dryer designed by our company specifically for bulk materials and has found its application in various industries, agriculture, waste processing. The list of drying various types of products and raw materials is very extensive and includes: distillery stillage, meal, pulp, grain, feed additives, bone meal, sawdust, wood chips, peat, sand, etc.
The advantage of this type of dryer is low humidity at the final stage, ease of operation, installation, maintenance, as well as minimal electricity consumption, which results in a reduction in production costs.
The main working part of the dryer is a rectangular chamber for heating and drying raw materials with a receiving hopper for raw materials, made of a supporting frame sheathed with sheet metal and lined with refractory bricks inside. Four screw conveyors of a closed type, which are fixed on the frame by means of support bearings and are driven by an electric motor through a gearbox by means of a chain drive. In the lower part of the chamber there are three fireboxes, with the possibility of using both natural gas and solid fuel. A screw conveyor for loading raw materials adjoins the main working part, as well as a pipeline for removing moisture from the heating chamber to the outside using a centrifugal fan.
The drying process itself takes place as follows: with the help of furnaces, the set temperature inside the chamber is reached, which is also transferred to the screw conveyors. After that, the raw material is loaded into the receiving hopper, which communicates with the upper screw conveyor and passes through it at a given speed, contacting the heated metal and giving off moisture, which is removed using a vacuum created by a high-pressure centrifugal fan. After passing through the first conveyor, the raw material is spontaneously poured onto the next one and further along the chain from the second to the third from the third to the fourth, while giving off moisture all the way to the exit for subsequent use.