What are the steps and precautions for switching the main catalytic cracking fan to its standby unit?

2009-11-21View Original

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What are the steps and precautions for switching the main catalytic cracking fan to its standby unit?

Reply #22009-11-21

http://bbs.hcbbs.com/viewthread.php?tid=324093 What issues should be considered when switching between the primary and backup fans!

Reply #32009-11-21

First, manually switch the main fan to self-protection mode; once the backup unit has reached normal pressure, fully open the outlet disc valve. Then switch the two exhaust valves, and after the pressure of the main unit drops, fully close the outlet disc valve and fully open the exhaust valves. During the process, ensure a stable main air flow rate and prevent pressure buildup in the unit

Reply #42009-11-23

The reaction unit can have its output reduced appropriately, while the main fan unit can be switched over smoothly under constant conditions of outlet flow and pressure.

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