Seeking help with temperature control in a converter!
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Our company uses a sulfur-resistant shift process with a low water vapor ratio; the CO content at the inlet is around 60%. Recently, each time the plant is started up, it has resulted in overheating or temperature fluctuations in the shift reactor. I would like some help. May I ask the teachers how to control the converter so that it does not overheat or drop below the optimal temperature during gas guidance?
You guys also use low-pressure gas guiding, right? The quenching amount wasn’t controlled properly. Hehe, hire me then:lol:lol
During the gas intake process, the main things to control are the inlet temperature and the gas flow rate. The distribution of air volume should be reasonable. The regulation of gas volume can be achieved by using valves to adjust the composition of the gas, as well as temperature control valves in the middle of the reformer to regulate the amount of gas fed into the furnace. What is your specific process?
Quenching capacity? Are you referring to the amount of quenching water? We indeed use low-pressure gas supply; the original requirement for starting the system was normal-pressure gas supply, but it was later changed to using gas at 1.0 MPa.
Low water vapor ratio gas intake: using bypass lines, cooling bypass lines, venting before and after the furnace, and introducing high-pressure nitrogen, among other methods
The quenching volume refers to the amount of cold coal gas fed into the furnace; this amount is crucial – too much of it can lead to temperature drops, while too little can result in overheating. Running the furnace a few more times will resolve this issue
Where does the cold gas come from? Chilling water volume? It’s difficult to control the liquid level in the gasifier
When adjusting the temperature of the shift converter, it is mainly achieved by controlling the pressure difference between the shift conversion section and the preceding section, as well as the amount of quenching gas fed into the shift converter. When the temperature of the shift converter is low, the pressures in the preceding section and the shift conversion section remain roughly the same; at the same time, the temperature of the gas entering the shift converter is also strictly controlled； When the temperature in the shift converter is too high, it is possible to increase the pressure difference between the preceding section and the shift converter section appropriately, in order to raise the space velocity and remove excess heat. During gas introduction, a drop in temperature is more likely to occur, mainly due to the increased space velocity which results in a large amount of heat being removed.
Hehe, high CO and low water/gas for sulfur-resistant shift gas generation! You are using our company’s catalysts; feel free to reach out to me if you have any issues! QQ421303151, Xiao Jiefei!
To control the temperature of the shift converter, our plant relies mainly on water cooling and heat exchange bypass systems. The cooling bypass system is generally not used; when operating at full capacity, activating this bypass system will increase the temperature at the inlet of the shift converter, with little effect in terms of cooling, and in some cases it may even raise the temperature further. When the temperature in the upper section is too high, it is possible to reduce the outlet temperature of the lower section; the specific method depends on the equipment available
I agree with what was said on floor 8. I would like to add my own thoughts and practical experience, which is to increase the gasification load as soon as possible