Abstract: A control system for maintaining a desired heat exchanger outlet flue gas temperature across a range of boiler loads. The heat exchanger includes a plurality of tubular configurations in heat exchange contact with the flue gas with each tubular configuration having a separate feedwater inlet. Flue gas temperature control is achieved by modulating the feedwater flow rates through the tubular configurations. In a system having two tubular configurations, the overall heat transfer capacity of the heat exchanger may be reduced to maintain the desired heat exchanger outlet flue gas temperature by reducing feedwater flow through one tubular configuration and overflowing the other, while maintaining the total flow of feedwater through the heat exchanger substantially constant.

Abstract: A gas temperature control system for maintaining a desired economizer outlet gas temperature across a range of boiler loads comprises a plurality of tubular configurations having surfaces that are in contact with the flue gas. Each tubular configuration, preferably, comprises a plurality of serpentine or stringer tubes arranged horizontally or vertically back and forth within the economizer, and each tubular configuration having a separate feedwater inlet. Heat transfer from the flue gas is accomplished by controlling the feedwater flow rates through the tubular configurations. In a temperature control system having two tubular configurations, the overall heat transfer capacity of the economizer may be reduced to maintain the desired economizer outlet gas temperature during low boiler loads by reducing feedwater flow through one tubular configuration and by overflowing the other tubular configuration, such that total flow of feedwater through the economizer is maintained substantially constant.

Abstract: The present invention relates to a device for generating superheated steam, comprising: a housing (10) having a cylindrical body and a combustion chamber with a hollow space portion formed in the cylindrical body, the housing having a discharge outlet (13) formed at a bottom end thereof so as to allow superheated steam to be discharged to the outside therethrough; a cover (14) mounted on a top end of the housing and having an injection inlet (12) formed at a top end thereof so as to allow steam to be injected into the housing 10 therethrough; a plurality of interval-maintaining means (20) horizontally stackingly arranged on top of one another in the combustion chamber of the housing in such a fashion that interval-maintaining means of even and odd number rows are alternately disposed and equidistantly spaced apart from one another, the interval-maintaining means of even and odd number rows having different outer diameters so as to define a fluid-communicating passageway (25) between the inner wall of the comb

Abstract: A medical waste treatment apparatus which comprises: a processing chamber where medical waste is loaded and heated; a combustion chamber having fuel burning means for burning a fuel to produce superheated water vapor by heating one of water and steam; superheated water vapor supply means having the combustion chamber for supplying the superheated water vapor to the processing chamber; a jacket surrounding at least a part of the processing chamber and forming a jacket space surrounding at least a part of the processing chamber between outer walls of the processing chamber; and a combustion gas introduction path interposed between the jacket and the combustion chamber for introducing combustion gas generated by the fuel burning means into the jacket space.