Four-nozzle vault problem
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I would like to ask what problems might arise if the height of the four-nozzle vault is increased? Is it necessary to continuously supply nitrogen during the normal startup of the gasifier? What is its function? How much is being fed in? What proportion does it account for in the syngas? How to remove it later? Thank you! ! !
Raising this dome should yield good results; at least the bricks used in the dome will have a longer lifespan. As for whether to continue supplying nitrogen after the vehicle is in operation, it’s sufficient to maintain nitrogen protection only for the pressure sensing tubes and thermocouples, and the amount of nitrogen required isn’t very large.
What is the relationship between the dwell time mentioned upstairs and the increased height of the vault? Please clarify. Also, a longer dwell time should imply a higher air pressure, right?
Are thermocouples also protected with nitrogen? Is it to lower the temperature or to prevent oxidation? Will the temperature measured in this way be slightly lower?
I think it’s the thermocouple tip that is filled with nitrogen for protection against oxidation; it’s not continuous gas replenishment； It’s similar to the principle of filling a light bulb with an inert gas.
Increasing the height of the arch roof also slows down the gas turbulence resulting from the atomization of the water-coal slurry, thereby increasing the residence time; however. The effect of increasing the residence time is minimal
Went the vault of Yankuang Guotai’s third furnace up in height? By asking the people at Cathay about the conditions of the third and second furnaces, one can understand the effect of raising the dome.
Please ask an expert to help solve this! ! !
The problem of excessive temperature at the crown has been largely resolved after raising it; however, whether or not it is raised is not one of the factors contributing to excessive temperature. After all, hasn’t the Guotai model without an elevated crown also been in operation for 8,000 hours? So, we still need to improve the operations further!