[Q&A Question 230] 2016.12.06
Thread Content
【Q&A Question 230】December 06, 2016: Why is it necessary to strengthen dehydration in various containers and columns during the cold oil operation of the hydrocracking distillation system? The reference answers will be visible after responding; points are awarded by identifying the key points. Firstly, the distillation system is washed with water before oil transfer, leaving water inside the pipelines and equipment. Secondly, the low-nitrogen oil received in the storage tanks may contain some moisture; if this moisture is not removed during cold oil transfer, then as the temperature of the bottom pump rises during hot oil transfer, it will not only cause the pump to experience vacuum conditions and lead to damage to the mechanical seals, but it will also result in fluctuations in the process operations. Summary post of Q&A from 2016 (updated up to December~~~~) http://bbs.hcbbs.com/thread-1597792-1-1.html Seeking sponsors for the “2016 Haichuan Top 10 Members Selection Contest” http://bbs.hcbbs.com/thread-1628108-1-1.html (Source: Haichuan Chemicals Forum)
Firstly, the distillation system is washed with water before oil transfer, leaving water inside the pipelines and equipment. Secondly, the low-nitrogen oil received in the storage tanks may contain some moisture; if this moisture is not removed during cold oil transfer, then as the temperature of the bottom pump rises during hot oil transfer, it will not only cause the pump to experience vacuum conditions and lead to damage to the mechanical seals, but it will also result in fluctuations in the process operations.
The low-nitrogen oil received in the tank area may contain a certain amount of moisture. If this moisture is not removed completely during the cold oil transfer phase, then during the hot oil transfer phase, as the temperature of the bottom pump rises, it can cause the pump to experience vacuum conditions, leading to operational fluctuations and damage to the mechanical seals.
Firstly, the distillation system is washed with water before oil transfer, leaving water inside the pipelines and equipment. Secondly, the low-nitrogen oil received in the storage tanks may contain some moisture; if this moisture is not removed during cold oil transfer, then as the temperature of the bottom pump rises during hot oil transfer, it will not only cause the pump to experience vacuum conditions and lead to damage to the mechanical seals, but it will also result in fluctuations in the process operations.
To prevent water from entering the system when the distillation system is put into operation; the presence of water in the system can lead to pump cavitation, slow temperature rise, unstable pressure, and imbalances between gas and liquid
The presence of water can interfere with the hydrodesorption system
Avoid excessive water vaporization during heating, which could cause flooding of the tower
The low-nitrogen oil received in the tank area may contain a certain amount of moisture. If this moisture is not removed completely during the cold oil transfer phase, then during the hot oil transfer phase, as the temperature of the bottom pump rises, it can cause the pump to experience vacuum conditions, leading to operational fluctuations and damage to the mechanical seals.
The low-nitrogen oil received in the tank area may contain a certain amount of moisture. If this moisture is not removed completely during the cold oil transfer period, then during the hot oil transfer period, as the temperature of the bottom pump rises, it can cause the pump to experience vacuum conditions, leading to operational fluctuations and damage to the mechanical seal