In the conversion system, is the steam added in excess relative to the feed gas?
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In the shift system, is the steam added in excess relative to the feed gas? As the amount of steam added increases, does the temperature of the shift reactor rise or fall?
This post was last edited by 654262293 on 2016-3-28 at 13:59. For the CO in the feed gas, water vapor is in excess; that is, water vapor is in excess relative to the CO that participates in the shift reaction, not with respect to the feed gas as a whole. During the gas admission process, as the amount of steam added increases, the temperature of the catalyst bed should first rise and then fall ； Under normal operating conditions, an increase in the steam supply should result in a decrease in the temperature of the catalyst bed.
If I want to increase the furnace temperature by 10 degrees, should I increase or decrease the amount of steam?
Firstly, steam is used to regulate the CO at the shift outlet and to meet the requirements of the subsequent process, rather than to adjust the temperature of the shift reactor. Secondly, increasing the temperature of the shift converter can only be achieved by raising its inlet temperature, which is the most basic principle of shifting.
If the CO content at the outlet of the conversion process is too high, then it is necessary to increase the amount of steam. As CO is converted, heat is released, which raises the temperature of the furnace. Doesn’t this show that increasing the amount of steam can raise the furnace temperature?
How should I understand your statement that \"increasing steam during normal production will lower the furnace temperature\"?
Increasing the steam promotes the CO conversion reaction, resulting in an increase in reaction heat; however, the space velocity also increases. With this increased space velocity, more reaction heat is carried away, so increasing the steam flow rate at this point will lower the temperature of the catalyst bed. Those who have operated shift-to-low conversion processes know that when using ferro-chromium-based conversion catalysts and the oxygen content is high, the temperature rises significantly; in such cases, the flow rate of steam is increased to prevent the temperature in the conversion furnace from rising too rapidly. This is exactly how it works.
Steam is indeed not used for temperature regulation, but under the operating conditions he mentioned, increasing the steam supply can significantly raise both the bed temperature and the outlet temperature
An increase in steam actually results in a furnace temperature curve that first rises and then falls. When there is a moderate excess of steam, it promotes the reaction, so the furnace temperature rises; however, if the excess is too large, it will suppress the reaction