Heat recovery in saturated hot water towers
Thread Content
As we all know, the main function of a saturated hot water tower is to recover the heat from the conversion unit. So, in processes with medium-low or full-low conversion, how much heat can a saturated hot water tower recover at most? That is, what is the optimal temperature difference between the semi-water gas at the outlet of the saturated tower and the hot water at the inlet? Under such conditions, what temperature can the semi-coke gas at the outlet of the saturated tower reach? What can be the ammonia steam consumption per ton?
In general, for the efficiency of heat recovery in medium-low-low conversion processes, it is necessary to control two temperatures based on practical experience: one is the temperature of the gas at the exit of the saturation tower, that is, the saturation level; the other is the temperature of the converted gas at the exit of the hot water tower； It is mainly the temperature of the shifted gas at the outlet of the hot water tower; as long as this temperature remains below 80°C, it indicates that heat recovery in the shift system is fairly complete. Of course, this temperature is also related to the usage time of the conversion catalyst.