Demchenko V. Improvement of the chamber of combustion fire-tube heating boilers

The dissertation is devoted to studying and development of a new way of the organization internal re-circulations by installation in the chamber of combustion space of a secondary radiator as fire pipes. It results in an intensification of heat exchange, changes aerodynamic and thermodynamic characteristics of the chamber of combustion, raising its efficiency up to 5 %, reduces emissions with practically in 5 times and NOx - in 2 times, providing better and rational burning of fuel, improving heating exchange, reducing time of a set of temperature of water in the boiler approximately on 20 %. The mathematical model and a design procedure of volumes of transit and circulating gases in fire tube the heating boiler is developed. Computer calculations and numerical modeling which allow to understand better aerodynamic, thermal and kinetic processes which proceed in recessive chambers of combustion with secondary radiators are carried out, comparison of their work with traditional is carried out. High convergence of values of factor re-circulation on both settlement models is received. The experimental way establishes influence of secondary radiators of a various design on chamber of combustion processes, an intensification of radiating heat exchange, decrease in harmful emissions in an atmosphere and an overall performance of the boiler as a whole, optimum conditions of application of secondary radiators Are investigated at work of boilers on natural gas and diesel fuel.