A 1-million-unit catalytic unit that has been shut down for a year is about to resume operation – what issues should be paid attention to?
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As the title suggests, the device has been shut down for almost a year; it’s now time to get it up and running again. What issues should be taken into consideration? Thank you all.
The safest approach is to conduct a thorough inspection and start operations following the procedures for new installations, which can help reduce the time required for each stage.
Corrosion and blockages of equipment and pipelines; lubricants must be changed for pumps before operation, as well as the pumps must be rotated manually and tested
Prevent equipment corrosion and leakage. In cold regions, it is necessary to check whether the equipment has frozen and cracked.
Seeking suggestions for starting up the catalytic unit http://bbs.hcbbs.com/viewthread.php?tid=422792&page=1#pid2263382
Get ready for operation: dry the lining, carry out water testing, perform pressure testing on the equipment, conduct oil testing, etc. Prepare the start-up plan and start-up manual. . . . .
Then let’s follow the startup plan for the new equipment! First, carry out maintenance work, and then conduct a thorough inspection using the three-checks and four-fixes method...............
The main inspections are equipment corrosion and rust: thickness measurements should be taken at key areas, and rotating pumps should be turned by hand.
During the line inspection, it is also necessary to pay special attention to whether the flange surfaces of certain pipelines might develop leaks due to weather-related stretching. At this point, even replacing the gasket won’t stop the leak. The rest has been prepared in accordance with normal startup procedures. If time isn’t a constraint, you can take your time preparing. Make sure to check every detail.
First, for static equipment such as towers and vessels, a water washing scheme should be considered to prevent corrosion deposits from causing blockages； Individual trial operation of mechanical equipment ； During purging and pressure testing, pay special attention to the risk of valve core detachment and internal leakage in key valves ； The self-protection and instrumentation systems need to be carefully inspected ； The auxiliary combustion chamber nozzles and the feed oil nozzles were removed for inspection.
1. Corrosion and blockage of equipment and pipelines 2. Sensitivity of instruments 3. Calibration of various control systems 4. Testing of the ESD system