Redesigning TBM-1.7 Combustion Unit to Expand the Temperature Range

Abstract

It is shown that the transition to a new low-temperature method of convective drying leads to a reduction in grain drying costs.The implementation of this method is confirmed to require expanded temperatures generated by the TBM-1.7 furnace unit that the SZSh-16A shaft dryer is equipped with. It is noted that a plant-manufactured burner nozzle works smoothly only when the fuel consumption is 40-100 kilograms per hour, and the air heating temperatures are 50-130 degrees Celsius. (Research purpose) To determine the jet optimal parameters for smooth operation of the nozzle in the TBM-1.7 combustion unit working on the liquid fuel at the extended air heating temperatures of 15-130 degrees Celsius. (Materials and methods) The designs of four types of jets were studied on the burner nozzle of the TBM-1.7 combustion unit. In total, the operation of 160 jets was examined. The jets were made of steel. They differed in the number of holes, their length, diameter, the availability of threads. (Results and discussion) It is determined that the nozzle smooth operation is provided only by jets with threaded holes, whose optimal length is 4 millimeters. The air heating temperature of 15-25 degrees Celsius is provided by M3 four-hole jet, and the temperature of 25-40 degrees Celsius is provided by M4 three-hole jet. (Conclusions) It is found that jets with smooth holes, regardless of their types, do not provide fuel combustion. It is found that the transition to a new low-temperature convective method led to a reduction in fuel consumption during the drying process, which, in turn, made it possible to save 300 thousand rubles during the harvesting period on the experimental farm in 2022.

Keywords

• liquid fuel combustion
• jet
• grain drying technology
• reduction in fuel consumption
• seed drying
• redesign of the combustion unit