[Q&A Question 328] 2017.12.12
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This post was last edited by Green Lotus on 2017-12-12 at 10:34. [Q&A Question 328] 2017.12.12: What are the reasons for the gradual decrease in the vacuum level of the condenser during turbine operation? Answer: (1) Insufficient circulating water volume. (2) Rise in the condenser water level. (3) The operating water temperature of the jet pump increases. (4) Air leaks in due to loose pipes and valves in the vacuum system. (5) The cooling water pipes inside the condenser are scaled or dirty. (6) The temperature of the cooling water rises too much. (Unless otherwise specified, all questions and answers are based on the hydrogenation unit.) ) 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 starting now) https://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) https://bbs.hcbbs.com/thread-1657794-1-1.html 2017 Daily Image Summary Thread https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 2017 LNG Version Daily Question List https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 2016 Q&A Summary Thread (updates completed) https://bbs.hcbbs.com/thread-1597792-1-1.html
1. Insufficient circulating water volume or high circulating water temperature. 2. Faulty steam ejector, low steam supply, or low valve opening. 3. Leaks in the valve pipelines. 4. High liquid level in the condenser. 5. Interruption of shaft seal steam or blockages in the pipelines. 6. Excessively high load on the turbine
1. Insufficient circulating water volume or high circulating water temperature. 2. Faulty steam ejector, low steam supply, or low valve opening. 3. Leaks in the valve pipelines. 4. High liquid level in the condenser. 5. Interruption of shaft seal steam or blockages in the pipelines. 6. Excessively high load on the turbine
1. The water temperature in the spray tank rises, causing the exhaust pump to malfunction. 2. Severe water accumulation in the return pipe of the shaft seal heater. 3. An increase in the condensate level. 4. Errors made by operators or maintenance personnel during their work, leading to a gradual decrease in the vacuum level of the condenser. 5. A gradual decline in the condenser’s vacuum level while safety measures related to the vacuum system are being implemented. 6. No water on the steam side of the low-pressure heaters during operation
(1) Insufficient circulating water volume. (2) Rise in the condenser water level. (3) Increase in the operating water temperature of the jet pump. (4) Air leakage due to loose pipes and valves in the vacuum system. (5) Issues with the structure or contamination of the cooling water pipes inside the condenser. (6) Excessively high temperature of the cooling water.
1. The water temperature in the spray tank rises, causing the exhaust pump to malfunction. 2. Severe water accumulation in the exhaust pipe of the shaft seal heater. 3. Water accumulation in the steam side exhaust pipe of the condenser. 4. Rising condenser water level. 5. Errors made by operators or maintenance personnel during their work lead to a gradual decrease in the condenser vacuum. 6. A gradual decline in the condenser vacuum occurs while safety measures related to the vacuum system are being implemented. 7. No water on the steam side of the low-pressure heater during operation
1. The water temperature in the spray tank rises, causing the extractor to malfunction. 2. Is there excessive water accumulation in the exhaust pipe of the shaft seal heater? 3. There is water accumulation in the steam side exhaust pipe of the condenser. 4. Has the condenser water level risen? 5. Errors made by operators or maintenance personnel during their work lead to a gradual decrease in the condenser vacuum. 6. When safety measures related to the vacuum system are implemented, the condenser vacuum decreases gradually. 7. There is no water on the steam side of the low-pressure heater during operation
1. Abnormal shaft seal pressure of the turbine. 2. Rising water level in the hot water well of the condenser. 3. Insufficient circulating water volume in the condenser. 4. Valves located in a negative pressure area opening (or closing) incorrectly. 5. The shaft seal heater is either full of water or has no water in it