[Q&A Question 268] 2017.09.26
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【Q&A Question 268】September 26, 2017: What are the possible reasons for a decrease in the water injection flow rate in hydrogenation units? (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The answers to the daily questions change, and today’s answers are shown in subsequent questions. For management purposes, if you need to view content from a few days ago, please access it through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)
The water injection control valves are faulty, and ammonium salt crystals are blocking the pipes.
1. Pressure in the water injection tank decreases； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. Rising system pressure ； 5. Air cooling blockage.
1. Pump failure 2. Control valve stuck 3. Problem with the flow meter 4. Excessively high system pressure 5. Low flow rate at the pump inlet
1. Pump damage 2. Liquid level depletion 3. Pipeline blockage
Mechanical seal leakage in the high-pressure injection pump, clogged impeller, clogged suction pipe, and the outlet valve not being fully opened.
1. Pressure in the water injection tank decreases； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. Rising system pressure ； 5. Air cooling blockage.
1. Pressure in the water injection tank decreases； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. Rising system pressure ； 5. Air cooling blockage.
1. Pressure in the water injection tank decreases； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. Rising system pressure ； 5. Air cooling blockage.
1. Unable to pump fluid； 2. Increase in system backpressure ； 3. Decrease in pump suction inlet pressure ； 4. Pump inlet filter clogged ； 5. Pressure buildup behind the pump outlet ； 6. Pipeline leakage ；