When CO2 takes a shortcut and enters the synthesis tower directly from the stripping tower, how do the temperatures at various points in the high-pressure system change?
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When CO2 takes a shortcut and enters the synthesis tower directly from the stripping tower, how do the temperature of the vapor stream at the outlet of the synthesis tower, the temperature of the liquid at the bottom of the high-pressure scrubber, and the temperatures at other points in the high-pressure system change?
This post was last edited by Xieshui on 2010-3-13 at 20:12. It would be best to determine under what operating conditions CO2 causes a short circuit.
When driving, CO2 takes a shortcut and enters the synthesis tower directly from the stripping tower; as a result, the temperature at the outlet of the synthesis tower rises, until it eventually becomes equal to the inlet temperature, thereby reducing the temperature difference across the heat exchanger.
The problem of CO2 bypassing the intended path referred to by the poster is known as CO2 leakage. I think the issue shouldn’t be considered in that way. Whether during the temperature-raising passivation period (after CO2 is introduced into the system) or during normal operation, CO2 leakage is one of the most serious accidents in high-pressure systems, and its occurrence must be strictly prevented. It is indicated by an increase in the pressure of the high-pressure system, or even overpressure, as well as fluctuations in the temperature of the liquid outlet line of the synthesis tower; these two factors alone are sufficient for making a determination. 1. Regarding the issue of CO2 bypassing during normal production, it was widely discussed a few days ago; I believe this can solve the problem raised by the original poster. It was posted by wlq1970 under the title: What is the phenomenon of CO2 gas \"backflow\"? What is the reason? How should it be prevented and eliminated? Its link is http://bbs.hcbbs.com/viewthread.php?tid=624011&page=1#pid3591668. 2. Regarding the issues of temperature-induced passivation, as well as the problem of CO2 taking a short circuit during the system pressure increase and replacement process or after material addition, it seems that these can be determined directly by examining the pressure in the high-pressure system and the temperature changes in the liquid outlet lines of the synthesis tower. During the aforementioned process, if a condensate is used to maintain the liquid seal, an increase in the temperature of the liquid outlet line of the synthesis tower as well as an increase in the pressure of the high-pressure system are sufficient indications that the liquid seal has been broken; immediate action must be taken, otherwise the only option left is to remove the CO2.