The role of rapidly cooled hydrogen
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Explain in more detail the role of injecting quench hydrogen into the diesel hydroprocessing reactor. . . . . . This post was last edited by Shuichangshou on 2009-2-7 14:56.]
The role of quench hydrogen is largely the same: it is used to control the reaction temperature, thereby allowing control over the conversion rate. In fine-reactor systems, quench hydrogen is employed to regulate the reaction temperature, and its flow rate is usually low. Cold hydrogen at the inlet of a cracking reactor is used to control the temperature at that inlet, while cold hydrogen in each bed layer is used to control the reaction temperature and thus the conversion rate. Another function of cold hydrogen is to rapidly cool down the bed layer when its temperature rises sharply, preventing excessive temperature increases.
Its main function is to prevent excessive temperature rise in the reactor bed; it can also be used to regulate the temperature of the reaction CAT. Under normal conditions, the opening degree of the emergency cooling hydrogen control valve should not exceed 1/3
The inlet temperature of the lower beds is controlled by adjusting the amount of quench hydrogen between the beds, in order to regulate the temperature rise within those beds. The temperature rise in each bed of the hydrocracking catalyst is kept at no more than 10–20°C, and efforts are made to maintain identical inlet temperatures across all beds, thereby achieving the desired refining effects and level of cracking, as well as ensuring long-term stable operation and thus extending the catalyst’s service life. When catalyst coking and carbon deposition cause gradual deactivation, gradually increasing the temperature is an effective control method. Prevent overheating