Process burner low-flow nitrogen protection valve
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When is this valve closed? Should it be turned off after the vaporization furnace has completed pressure relief? Should it be turned off after the gasification furnace replacement is completed?
This valve is called a low-flow purge valve, but in practice, it doesn’t have much practical use. This low-flow purge line is generally installed in parallel to the high-pressure nitrogen purge valve of the gas pipeline; such an arrangement makes it appear more like a bypass balance valve for the high-pressure nitrogen purge valve.
It is advisable to close this valve after the system has been depressurized and purged properly, and its temperature has dropped below 600°C；
The pressure relief and replacement procedures were successful. Before initiating the negative pressure extraction process for the burner in the gasification furnace, it is necessary to isolate the furnace in order to keep the burner protected; it’s not known what the temperature of the furnace is at this time
No way – the slurry pipeline has its own purge valve, and the oxygen pipeline also has its own purge valve. But the oxygen pipeline is equipped with a nitrogen protection valve as well; this is essential, otherwise during the shutdown and pressure retention phase, when the furnace or individual burners are shut down, the temperature inside the furnace remains very high, and there would be no medium available to protect the burners. As for the other two, they are purge valves, which, as the name suggests, are used to purge pipelines
This valve is designed to provide low-flow purge protection during shutdown, but this function is not particularly significant in single-nozzle vaporizers; it is relatively more important in four-nozzle vaporizers.