Discussion on the pressure difference control between the water in the space furnace burner and the gasification furnace?
Thread Content
The water in the combustion burner of the spacecraft furnace and that in the gasification furnace are controlled using pressure difference. When the gasification furnace stops operating and pressure is released, the buffer tank for the burner water also loses pressure at the same time; this ensures that the pump used to supply water to the burner does not suffer from cavitation due to high water temperature and low pressure
I’m not quite sure I understand this – if the high pressure in the burner sink is controlled, wouldn’t the pump be less prone to cavitation?
The purpose of releasing pressure in synchronization with the gasification furnace is likely to prevent excessive stress from being applied to only one side of the burner’s cooling water jacket; this is similar to the principle of maintaining a pressure difference between the water vapor system and the gasification furnace. The pressure control of the burner cooling water tank should be a cascade control system, with the pressure of the gasification furnace being integrated into it and adjusted as the pressure of the gasification furnace changes. We used coal-fired boilers before as well; they were the earliest Shell boilers, but they were pretty much similar to the space boilers.:):):)
When the gasifier is shut down and depressurized, the burner water system also loses pressure, as they are controlled together based on pressure differences. How can cavitation in the depressurization pump be prevented?
For the shell furnace, the burner water system can have its pressure increased or decreased separately. However, in aerospace furnaces, the pressure difference between the burner and the furnace must not be too large, as this could cause problems with the water jacket of the burner!
Well, the coal burner of the space furnace seems much more complex than that of our furnace; after all, it’s a three-in-one unit. I’ve seen in previous documents that your water jacket has several layers. I hope to be able to ask more questions about the space furnace in the future.