【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 4-25
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【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 4-25: Briefly describe what state the standby pump should be in. 1. The lubricant level is normal and the oil quality is good. 2. The inlet valve of the pump is open, the outlet valve is closed, and the pressure gauge valve is open. 3. The cooling water valve is closed. 4. There is no leakage from the mechanical seal. 5. All accessories and safety devices of the pump are in good condition and intact. 6. The pump should be rotated 180° once per shift. 7. In winter, measures must be taken to prevent freezing and condensation. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Setting it to a reply earns 1 wealth point; those who answer correctly receive an additional 2 wealth points, while those who get it wrong receive no points at all. Please have the person in charge update the wealth points consumed by the question setter as soon as possible. Temporarily, the top 60 players will receive automatic wealth +1. 3 correct for wealth, 1 incorrect for wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
1. The lubricant level is normal and the oil quality is good. 2. The pump inlet valve is opened, the outlet valve is closed, and the pressure gauge valve is opened. 3. The cooling water valve is closed. 4. The mechanical seal does not leak. 5. The pump’s accessories and safety devices are in good condition and intact. 6. Turn the shaft once per shift (180°). 7. In winter, pay attention to preventing freezing and condensation.
1. The lubricant level is normal and the oil quality is good. 2. The inlet valve of the pump is open, the outlet valve is closed, and the pressure gauge valve is open. 3. The cooling water valve is closed. 4. The mechanical seal shows no leakage. 5. The pump’s accessories and safety devices
In hot standby mode to ensure availability at any time
1. Lubricant level is normal. 2. Pump inlet is open and outlet is closed
1. The lubricant level is normal and the oil quality is good. 2. The inlet valve of the pump is open, the outlet valve is closed, and the pressure gauge valve is open. 3. The cooling water valve is closed. 4. The mechanical seal shows no leakage. 5. The pump’s accessories and safety devices
1. The lubricant level is normal and the quality of the oil is good. 2. The inlet valve is open while the outlet valve is closed. 3. The cooling water valve is closed. 4. The mechanical seal does not leak. 5. The pump’s accessories and safety devices
The standby pump should be in standby mode, and the cold pump should be in a cold state； The high-temperature pump is in thermal standby mode.
1. The electrical and instrumentation components are in good condition. 2. The lubrication system must be functioning properly. 3. The pump rotates smoothly without any jamming. 4. The cooling water supply is normal. 5. The inlet and outlet valves are in proper working order. 6. The pump should always be kept clean.
1. The turning gear is operating normally, with no abnormal sticking； 2. Turn on the heating pump circuit; be careful that the temperature difference with the operating pump should not be too large ； 3. The lubricant level and quality are normal ； 4. The mechanical seal and associated facilities are in good condition, with no leaks ； 4. The cooling system is functioning properly ； 5. Electrical, on-site, and remote instruments are functioning normally.
Answer: During normal operation, the standby pump should be in automatic mode with its inlet and outlet valves open. Only in this way can it ensure that the standby pump starts promptly in case of a failure of the operating pump, thus preventing interruptions in water supply to the burner. The standby pump starts automatically when the outlet pressure of the operating pump falls below 0.7 MPa.