| 摘要 |
PURPOSE:To enable normal and reliable maintenance of a ratio of an actual oxygen feed amount to a fuel gas amount, by a method wherein the excess and deficiency of an amount of oxygen actually mixed in fuel gas is detected, and based on the results, a loading pressure exerted on a governor for regulating gas flow rate is automatically regulated through feedback control. CONSTITUTION:A fuel gas feed line 3 is guided and connected to a burner 2 disposed to the inner bottom of a combustion chamber 1, and a feed line 5 for the air for combustion, through which the air for combustion is fed by a pressure by means of a blower 4, joins to the vicinity of said burner 2 of the fuel gas feed line 3 for connection to form an initial mixture type combustion device. An air bleeding line 11 is branched halfway along a loading line 9, an electromagnetic type flow rate regulating valve 12 is located on the air bleeding line 11, and this constitution enables change and control of an air pressure within the loading line 9, i.e., a drive pressure exerted on a governor 8 for regulating gas flow rate. The flow rate regulating valve 12 is automatically regulated so that the ratio of fuel gas to an actual oxygen amount contained in the air for combustion mixed in the fuel gas is maintained at a desired value. |
