【Daily Question 2019】Hydrogen production and hydrogenation section – Questions 5-11
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【Daily Question 2019】Hydrogen production and hydrogenation section – Questions 5-11: The temperature of the heater is currently under cascade control. If it is necessary to calibrate the gas flow meter at this time, what procedures should be followed? And what should be done if it is the gas flow control valve that needs to be calibrated? When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to remove any residual gas from the pipeline. (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 +1 to automatic wealth acquisition. 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
When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to discharge any residual gas in the pipeline
When calibrating the gas flow meter, switch from cascade control to manual operation
Answer: When reading the gas flow meter at the plant, switch from cascade control to manual operation. Make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to remove any residual gas from the pipeline.
When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to release any residual gas in the pipeline.
When calibrating the gas flow meter, switch from cascade control to manual operation, and be careful to maintain the gas level
When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to remove any residual gas from the pipeline.
When calibrating the gas flow meter, switch from cascade control to manual operation, and be careful to maintain a stable gas flow rate as well as avoid large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to release any residual gas in the pipeline.
When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to remove any residual gas from the pipeline.
When calibrating the gas flow meter, switch from cascade control to manual operation; make sure to maintain a stable gas flow rate and prevent large fluctuations in temperature. The school gas flow control valve must be operated via a bypass line: the gas bypass valve should be opened while the control valve is closed. It is important to maintain a steady gas flow during this switching process, and then the shut-off valves before and after the control valve should be closed. Finally, the low-point vent valve should be opened to remove any residual gas from the pipeline.
When calibrating the gas flow meter, change it from cascade mode to manual mode