[Q&A Question 253] 2016.12.29
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【Q&A Question 253】December 29, 2016: Under what circumstances should the reciprocating pump in a hydrogenation unit be shut down urgently? 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.) ) 1. The lubricating oil pressure is below the interlock value, but no interlock occurs ； 2. The lubricating oil temperature is high and cannot be adjusted ； 3. Fire in the compressor housing and pipelines ； 4. Obvious abnormal noises such as knocking can be heard from the compressor housing ； 5. The compressor bearing temperature rises sharply ； 6. The motor temperature rise exceeds the specified value ； 7. Motor current overload adjustment is ineffective ； 8. Disruption of new hydrogen supply ； 9. Interlock not functioning – Summary of Q&A posts from 2016 (updated up to December) http://bbs.hcbbs.com/thread-1597792-1-1.html New Normal Cup – 2016 HaiChuan Top 10 Selections – Please recommend candidates http://bbs.hcbbs.com/thread-1654112-1-1.html Third round of HaiChuan’s Outstanding Management Members selection contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: HaiChuan Chemical Forum)
①The main motor caught fire suddenly. ②The transmission mechanism emitted a distinct metallic clanging sound. ③There is a metallic banging sound coming from the compressor cylinder. ④Severe gas leak. ⑤The feed gas contains a large amount of liquid. ⑥The bearing is smoking. ⑦Emergency situations such as a rupture in the lubricating oil pipeline that makes it impossible to gain control.
①The main motor caught fire suddenly. ②The transmission mechanism emitted a distinct metallic clanging sound. ③There is a metallic banging sound coming from the compressor cylinder. ④Severe gas leak. ⑤The feed gas contains a large amount of liquid. ⑥The bearing is smoking. ⑦Emergency situations such as a rupture in the lubricating oil pipeline that makes it impossible to gain control.
The pressure is below the interlock value, so no interlock action occurs； The lubricant temperature is high and cannot be adjusted ； Fire in compressor casing and pipelines ； The motor temperature rise exceeds the specified value ； New hydrogen interruption ；
When abnormal noises are heard from the compressor or other issues such as arcing in the electrical wiring occur.
Low lubricating oil pressure； High exhaust temperature ； High liquid level in the inter-machine separation tank ； The device has a high leakage rate ； Abnormalities in the air valve, etc
An emergency stop can be initiated in any of the following situations: ① The readings on the pressure gauges of the press are not within the specified range, and they cannot be adjusted. ②The temperature readings of various components in the compressor exceed the specified values. ③The compressor cooling water pressure and lubricating oil pressure are below the specified values, and automatic control has failed. ④The compressor has issues with backflow of air, water leakage, and oil leakage. ⑤The readings of instruments such as current suddenly increase. ⑥The compressor or motor is making abnormal noises.
①The readings of the pressure gauges on the press are not within the specified range, and they cannot be adjusted. ②The temperature readings of various components in the compressor exceed the specified values. ③The compressor cooling water pressure and lubricating oil pressure are below the specified values, and automatic control has failed. ④The compressor has issues with backflow of air, water leakage, and oil leakage. ⑤The readings of instruments such as current suddenly increase. ⑥The compressor or motor is making abnormal noises.
Low oil pressure, low water pressure, large-scale leaks, cylinder collision, shaft vibration, increased displacement, high temperature
First, abnormal noises occur; second, the device catches fire.