【Q&A Question 026】2017.01.26
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This post was last edited by 955559 on 2017-7-21 at 12:39. [Q&A Question No. 026] 2017.01.26: What is the purpose of the quench hydrogen in a hydrogenation unit? What should be noted when using quench hydrogen during normal operation? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The quench hydrogen used in the design of hydrogenation units is primarily used to inject a cold medium into the catalyst bed, thereby keeping the reaction temperature in that bed within a certain range, preventing the occurrence of \"temperature spikes\", and protecting both the catalyst and the equipment. When in normal use, the opening degree should not be too large; a certain margin should be left for use in case of emergencies. Xin Chang Cup – Voting for the Top 10 Members of HaiChuan in 2016 is now underway; choose the member you care about the most (please cast your valuable vote for those from the Petrochemical Division). http://bbs.hcbbs.com/thread-1667649-1-1.html Summary post of Q&A sessions from 2017 (updates available now). http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions from 2017 (updates available now). http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A sessions from 2016 (all updates completed). http://bbs.hcbbs.com/thread-1597792-1-1.html Third round of selection for outstanding management members at HaiChuan. http://bbs.hcbbs.com/thread-1655902-1-1.html “Creative Ideas for Energy Saving” campaign in the Petrochemical Division. http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are up for grabs. Summary post collecting chemical engineering-related materials from the “Petrochemical Section”. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes waiting for you (Source: HaiChuan Chemical Forum)
The quench hydrogen used in the design of hydrogenation units is primarily used to inject a cooling medium into the catalyst bed, thereby keeping the reaction temperature in that bed within a certain range, preventing the occurrence of \"temperature spikes\", and protecting both the catalyst and the equipment. During normal operation, care should be taken to ensure that the opening degree of the quench hydrogen control valve is not too large; a certain margin should be left for use in case of emergencies.
The reaction temperature of the catalyst bed is kept within a certain range to prevent the occurrence of \"temperature spikes\", thereby protecting the catalyst and the equipment. During normal operation, care should be taken to ensure that the opening degree of the rapid cooling hydrogen control valve is not too large; a certain margin should be left for use in case of emergencies.
Control the bed temperature, perform emergency cooling； Make sure it remains unobstructed, with the opening degree below 60%
In the design of hydrogenation units, emergency cooling hydrogen is used to inject a cold medium into the catalyst bed, thereby keeping the reaction temperature in that bed within a certain range, preventing the occurrence of excessive temperature rise, and thus protecting the catalyst as well as the equipment.
Limit the reaction temperature of the catalyst bed to a certain range to prevent the occurrence of ‘temperature spikes’, thereby protecting the catalyst and the equipment. During normal operation, care should be taken to ensure that the opening degree of the rapid cooling hydrogen control valve is not too large; a certain margin should be reserved for use in case of emergencies.
When the temperature of the reactor bed is high, cold hydrogen can be injected to lower it. When using cold hydrogen, pay attention to the bed temperature and the amount of circulating hydrogen to prevent a decrease in the amount of circulating hydrogen due to an excessive supply of cold hydrogen
Its function is to regulate the bed temperature of the reactor and prevent excessive temperature rise in the reactor bed. During operation, be careful not to open the quench hydrogen control valve too much when the reactor bed temperature is normal, in order to reserve it for emergency use.
The role of quench hydrogen is to control the reaction temperature (catalyst bed temperature) by regulating the conversion rate, thereby preventing overheating. The opening degree of the rapid cooling hydrogen control valve should not be too large; a margin should be left for use in case of emergencies.
Lower the bed temperature to remove the heat of reaction and prevent the bed temperature from rising too high, which could lead to excessive temperatures. When in use, pay attention to the amount of cold hydrogen – it should not be too large nor too small; too much cold hydrogen will result in too low a bed temperature and incomplete reactions, while too little will make it easy for the bed temperature to exceed safe levels or even cause excessive temperatures
In the design of hydrogenation units, emergency cooling hydrogen is used to inject a cold medium into the catalyst bed, thereby keeping the reaction temperature in that bed within a certain range and preventing overheating