Steam above the burner of the ethylene cracking furnace
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What is the purpose of feeding steam into the burner in the radiation section of an ethylene cracking furnace?
This post was last edited by cjm6536536 on 2018-6-27 at 15:17. Adding a certain proportion of steam to the fuel gas in the bottom burner can reduce the formation of NOx; this is mainly used during the coking process, as NOx is difficult to control during that stage
How did you know? Do you have practical experience?
In June, I attended a technical exchange seminar on ethylene cracking technologies, where experts from Sinopec discussed the results of measures taken to reduce NOx levels. I don’t have any practical experience; the design of the burner at the bottom of our company’s pyrolysis furnace also includes this MS line (the pyrolysis furnace has not yet been built)
It mainly involves using medium-pressure steam to assist combustion and reduce smoke when burning heavy fuels such as liquefied gas
Used to reduce NOx, but it results in significant heat loss.
Are you referring to that ethylene plant under construction? Is this equivalent to the steam generated alongside the burning torch? The effect of introducing steam should be to lower the temperature at the center of the flame, thereby reducing the formation of nitrogen oxides. These days, SCR denitration reactors are generally installed in the convection section of the pyrolysis furnace, and the requirements regarding nitrogen oxide levels in such furnaces are becoming increasingly strict
Using a low-nitrogen burner might be better than SCR. Adding an SCR is troublesome both from an operational and a safety management perspective.
It mainly involves using medium-pressure steam to assist combustion and reduce smoke when burning heavy fuels such as liquefied gas