Fedyay B. Thermal regime improvement in heat generators furnaces of small and middle power

Object - heat exchange process in the fire-chambers of the little and average capacity heat generators (N<1750 kW) equipped by secondary radiator and without it at the variable mode of exploitation. Purpose - increase of thermothechnical and operational effectiveness of fire-chambers of the little and average capacity heat generators at the expense of the secondary radiators use, the constructive (geometrical) fire-chambers characteristics optimization and the intermediate radiator. Methods - analytical methods are used, they are based on the radial and convectional heat exchange laws, burning and non-stationary thermal ductivity theory. Real experimental investigations are conducted in the acting industrial furnace with modern measuring devices of the home and foreign production use. Novelty - the improved mathematical model for calculation of heat exchange process in fire-chambers of the little and average capacity heat generators (N<1750 kW) on the theoretical and experimental investigations base is proposed; the method of calculation for local distributions of temperatures determination on ray perceived surface of screens and discovers of scum form zones in fire-chamber screens of heat capacity to 1750 kW boilers is offered. Results - as a result of the conducted theoretical and experimental investigations influence of the secondary radiator on temperature conditions and heat flows distribution and also on use of fuel in fire-chamber effectiveness are determined; semi-spherical burners of infra-red radiation of quartz glass-ceramics and semi-spherical fire-chamber are elaborated; the technology determination of the burner necessary thermal capacity in heating and thermal furnaces proceeding from the fire-chamber given temperature conditions and speed of its changes is developed; results on the theme of thesis are introduced at analysis of the thermal furnaces heat mode of the forge shop of the open joint-stock company "TRZ", the thermal furnaces of the forge shop of the open joint-stock company "PTMZ" and they also are taken in account at elaboration of their reconstruction project directed on increase of the fuel use effectiveness. Branch - construction.