Combustion Controlling Device Optimizing Multi-Burner Prepurge Time
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Solution Overview
Problem
In multi-burner systems with physically separated combustion spaces, the existing ignition sequence control methods result in prolonged overall prepurge times during initial startup, as each burner controller performs both overall and single purges, which increases the time required to ignite burners.
Innovation Solution
A combustion controlling device that instructs burner controllers to purge and ignite multiple burners after overall purge completion, with separate prepurge times for initial startup and normal operation modes, allowing for optimized purge times by setting different prepurge execution times based on operational modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each burner controller performs both overall purge and single purge sequentially during initial startup, then safety is ensured by thorough purging, but the overall prepurge time is prolonged
Solution Approach 1:
The overall purge is performed as a preliminary action before the burners are ignited. The safety controlling device executes the overall purge to discharge residual fuel from the combustion chamber, and only after this preliminary purging is completed does it instruct the burner controllers to ignite the burners. This sequential arrangement ensures safety while optimizing the total startup time.
2Reliability
If separate single purge is performed for each combustion space in multi-burner systems with physically separated combustion spaces, then safety is improved by addressing individual combustion spaces, but the complexity of ignition sequence control increases
Solution Approach 1:
The safety controlling device is designed to perform multiple functions: it executes the overall purge for the entire combustion chamber and also instructs each burner controller to perform individual single purges for their respective combustion spaces. This multi-functional approach ensures comprehensive safety coverage across all combustion spaces while centralizing the control logic in one device, thereby managing complexity effectively.
Data Source
AI summary
A purge time of a combustion space is optimized in a multi-burner system having a combustion chamber in which the combustion space is physically separated from a heating space by providing a combustion controlling device. The combustion controlling device controls an operation of multiple burners having combustion spaces different from each other, a first prepurge time and a second prepurge time set as execution times of a single purge, the single purge based on the first prepurge time is performed on a combustion space of a corresponding burner after overall purge when an ignition of the burner is instructed in a state where none of the burners is ignited, and the single purge based on the second prepurge time is performed on the combustion space of the corresponding burner when the ignition of the burner is instructed in a normal operating state.