Gasification, low oxygen purity
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Dear experts, I’m a beginner in gasification. Currently, during gasification in the factory, the oxygen contains a high level of argon. I’m not sure what impact this has on the products of gasification Thank you
How high is the argon content exactly? For general water-coal slurry gasification, an oxygen content of 99.5% or 99.6% is sufficient; the purity of oxygen affects the amount of oxygen consumed by the air separation unit, but it should have little impact on other aspects.
For air separation, argon is a by-product, and it has a slight impact on production volume. In the gasification section, an increase in argon means that the oxygen purity is insufficient; to maintain a constant temperature in the gasifier, more oxygen has to be used. So it has little impact on the product but increases production costs. Additionally, this situation is likely caused by a problem with the cold box in the air separation unit, which results in incomplete separation during distillation; it is necessary to identify the issue promptly and address it.
There is a problem with the air separation; the argon content in the oxygen has reached over 10%
The argon content should have no effect on the gasification process; adjust the air separation instead.
It’s equivalent to reducing the load; just adjust the oxygen-to-coal ratio accordingly. The consequence is a decrease in the amount of usable gas. Argon being an inert gas means that it needs to be vented from the system, which results in waste. The air separation argon system wasn’t properly controlled, which caused a large amount of liquid at the bottom of the argon column to flow into the main cooler; otherwise, the argon concentration wouldn’t be so high. I’ve also encountered an oxygen concentration of 86%, and with proper adjustments, it doesn’t cause any significant problems.
Are you that vaporization technology? A high argon content has a certain impact on the temperature of the gasification furnace. Adjust the air separation properly