| 摘要 |
PURPOSE:To close a spud cut-off valve automatically without depending upon the manual operation of an operator by deciding as to whether or not a LNG burner to be ignited must be ignited on a starting by an ignition completion burner number counting circuit. CONSTITUTION:When a boiler starting time LNG burner is ignited, a starting burner select signal is brought to ''1'', AND 11 is brought to ''1'' when burner ignition permissible conditions are formed, a spat-cut valve close command is outputted by a burner ignition command, the complete closing of a spud cut-off valve is made sure, and a series of burner ignition sequential logic is executed. The burner ignition permissible conditions are formed when each operating terminal around the burner is all brought to the state in which the burner can be ignited at that time. The starting burner select signal is brought to ''0'' on the normal ignition of the burner. Accordingly, workability can be improved, malfunction prevented and the labor of an operator saved. |
