Patent ID: 6371752
Filing Date: 2002-04-16
Classification: F23D,F23N

Abstract:
A method for controlling combustion of burners in a batch-type combustion furnace in which a fuel gas control valve is electrically linked to a corresponding air control valve for controlling each of said burners, said method comprising the steps of:preliminarily affecting a flow range ratio adjusted with zero and span adjustments between the fuel gas control valve and the corresponding air control valve as to give a theoretical air-fuel ratio when the identical electric signals (S) from a temperature controller unit are given to the fuel gas control valve and the air control valve, inputting an electric signal (S) from the temperature controller unit to the fuel gas control valve to control an open degree of the fuel gas control valve, adding an electric signal (X) for adjusting an excess air volume to a same electrical signal (S) as that for the fuel gas control valve, and inputting the resulting electric signal obtained by said addition (X+S) to the air control valve to control an open degree of the air control valve, wherein the combustion of each of the burners is controlled.