| 摘要 |
<p>A system for the preheating of gaseous fuels being fed to a furnace, the fuels having a wide range of molecular weights, and corresponding calorific values, in which all of the combustion air is provided by inspiration, due to the flow energy of the fuel. The invention involves the monitoring of oxygen in the products of combustion moving from the furnace to the stack, or, alternatively, monitoring the molecular weight of the fuel on the inlet line, and controlling the preheating of the fuel in a heat exchanger, so as to maintain a selected temperature of the fuel going to the burners, in accordance with the molecular weight of the fuel.</p> |
