Can high-temperature residue oil be used as a heat source for the bottom reboiler vapor in the liquefied gas desulfurization regeneration tower?
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Can the bottom reboiling steam in the liquefied gas desulfurization regeneration tower be heated using high-temperature residue oil? Here we use steam, and the resulting condensate is fed into the condensate pipeline network! Is it to take into account the issue of tube bundle leakage? If oil leakage is a problem, that’s why steam is used? Also, our steam flows through the tube side, while the rich liquid flows through the shell side. Could this lead to double corrosion of the tubes in both sides? The spread of corrosion is related to the system’s pressure drop; is it possible to make the steam flow through the shell side in order to reduce corrosion?
High-temperature residue can be used as a heat source; corrosion and leakage issues are related to the material selection, but when dealing with leakage accidents, it has an impact on the further use of the residue. Steam is used in the tube side for two reasons: 1. Steam is cleaner than liquefied gas, making it suitable for use in the tube side; it does not cause blockages and results in a low pressure drop ； 2. It is difficult to drain the condensate generated by steam flowing in the shell side.
The use of hot slag is not recommended, as any leakage can have a serious impact on the quality of liquefied gas, and it is difficult to handle such situations.
In addition to the issues mentioned above, it is also necessary to pay attention to whether such desulfurization media are heat-sensitive. Can excessive temperature cause denaturation of substances?
Ammonia solution undergoes thermal decomposition when its temperature exceeds a certain level; therefore, high-temperature oil slurry is not suitable as a heat source. Even steam must be reduced to a specified pressure before use. Additionally, due to the severe corrosive nature of ammonia solution, any leakage will contaminate the entire ammonia system.
I also disagree with using residue oil as a heat source; it is difficult to clean and prone to clogging. We use steam as the heat source
Residues can be used, but I think using residues as a heat source is dangerous in case of a leak, so safety considerations must be taken into account. Steam can only flow through the tube side; if the rich liquid also flows through the tube side, it becomes difficult to control the liquid level at the bottom of the tower. How can sulfides be evaporated in such a situation?
7# It seems that the decomposition of gold-sulfide compounds should take place inside the tower; the reboiler merely provides heat!
Using hot oil as a heat source is not impossible; we have already carried out technical modifications, but there are still some potential issues that prevent its use at present. Just as mentioned above, there is leakage and contamination by amine liquid and liquefied gas
The temperature of the heat source at the bottom of the amine regeneration tower should preferably not exceed 150°C, otherwise it will cause degradation of the amine solution.