I’d like to ask for a moment to discuss an issue related to gasification
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During the shell gasification process, coal powder is transported using nitrogen. May I ask if it is necessary to remove nitrogen from the mixture?
I didn’t understand what you’re asking. What do you mean by “excluding the steps, how many are there”?
What you should be asking is how to remove this nitrogen
For urea production plants, there is no need to remove nitrogen; the purification process relies on a two-stage washing system (low-temperature methanol for washing acidic gases, and liquid nitrogen for washing methane and carbon monoxide), with nitrogen being added to the system as needed； However, for non-urea products, nitrogen is an inert gas, and there are two approaches to address this issue: ① Solve it at the source—replace nitrogen with carbon dioxide, which can be removed through low-temperature methanol washing ； ②At the purification end, it is released as exhaust gas, and is discharged after passing environmental protection requirements ；
The poster explained it very clearly; what follows is nitrogen fertilizer or urea, which are still useful components. In cases where hydrogen or methanol is to be produced, carbon dioxide can be used as a substitute, or the amount of off-gas released can be increased
Agree: victory:
Depending on the process flow and product, carbon dioxide or nitrogen can be chosen; it was explained clearly on the 2nd floor.
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