Abstract:
Es wird ein Verfahren zum Betreiben eines Luftvorwärmers (21) vorgeschlagen, mit dessen Hilfe die Wärmeübertragungsleistung erhöht werden kann, ohne dass Kondensationserscheinungen auf der kalten Seite des Rotors oder Ascheablagerungen an den Heizblechen zu befürchten sind.
Abstract:
This invention relates to a fossil-fired thermal system such as a power plant (20) or steam generator, and, more particularly, to a method for rapid detection of tube failures (27) and their location within the power plant (20) or steam generator, without need for direct instrumentation, thereby preventing more serious damage and minimizing repair time on the effected heat exchanger (28). This method is applicable to Input/Loss methods of monitoring fossil-fired thermal systems.
Abstract:
A heat exchange method capable of suppressing a loading on a rotating motor and a wear of a seal part and simultaneously performing a recovery of heat from exhaust gas and a reduction in NOx, comprising the steps of detecting the density of Nox in the exhaust gas exhausted from a furnace (10) such as a billet heating furnace and a billet heat treatment furnace having a rotating regenerative heat exchanger installed therein and controlling the speed of a rotor (3) by a controller (14) so as to increase the speed of the rotor (3) of the rotating regenerative heat exchanger when the density of Nox is increased, whereby the speed of the rotor is not required to be increased at all times for the maximum load of the furnace, and the load on the motor and the wear of the seal part can be suppressed.
Abstract:
A flameless combustion heater system is described that comprises a flameless combustion heater; an oxidant inlet pipe; a fuel inlet pipe; and a preheater for preheating the oxidant or the fuel, said preheater comprising an oxidation catalyst. A method for starting up a flameless combustion heater is described comprising passing a fuel-oxidant mixture to a preheater comprising an oxidation catalyst to preheat the fuel or oxidant stream being fed to the heater. A method for controlling the temperature of the flameless combustion heater system is also described that comprises controlling the amount of fuel and/or oxidant that passes through the preheater.
Abstract:
Embodiments of the present invention provide a fuel supply system for combustion engines, whereby the temperatures of an oxidizer and fuel may be increased so that the temperatures approach but do not achieve an auto-ignition temperature for the fuel charge. The fuel charge may result in substantial improvements in fuel efficiency.
Abstract:
A method for operating an air preheater (21) is disclosed, by means of which the heat transfer capacity can be increased without fear of condensation appearing on the cold side of the rotor or ash deposits on the hot sheets.
Abstract:
The operation of a fossil-fueled thermal system (20) is quantified by obtaining a reference fuel chemistry before on-line operation (270), and thereafter operating on-line. In on-line operation (270), a set of measurable operating parameters is measured, including at least effluent concentrations of oxygen and carbon dioxide, and optionally the concentration of effluent water and the concentration of effluent sulfur oxide. An indicated Air/Fuel ratio is obtained, as are the ambient concentration of oxygen, and air preheater (36) leakage (29) and dilution factors. The fuel ash (Eq. 29) and fuel water are calculated, and the complete As-Fired fuel chemistry is calculated. From the complete As-Fired fuel (Eq. (13)) chemistry, the pertinent systems parameters such as reference fuel heating value, boiler efficiency (32)(Eq. 4(21)), system efficiency, fuel flow rate (Eq. 4(21)), total effluent flow rate (20), individual effluent flow rates (292), and individual emission rates (292) are determined in a fully consistent manner.