【Q&A Question 140】2018.05.20
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This post was last edited by Internet Invisible Man on 2018-5-20 08:14. [Q&A Question 140] May 20, 2018: Briefly describe the phenomenon of a large-scale leak in hydrogenation and hydrogen-handling areas and the methods for dealing with it Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 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. The APP short-video skills competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Pressure drops, combustible gas detection and alarms trigger, emergency pressure relief occurs, the system is filled with nitrogen as a substitute gas, the fire department is contacted, the area where the fire is located is covered to prevent it from spreading, and air respirators are worn to avoid poisoning
Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate.
1. Alarm from the on-site combustible gas detector. 2. Drop in system pressure. 3. Significant increase in the amount of fresh hydrogen being introduced. 4. If the leakage occurs before the reactor, the bed temperature will rise further. Actions to take: 1. Immediately activate the emergency pressure relief system. 2. Extinguish all sources of fire in the vicinity. 3. Evacuate unrelated personnel from the area and set up barriers. 4. Call the fire department and contact specialized teams for protection. 5. Isolate various systems and use steam to cover the area around the leakage point. 6. Once the pressure drops below that of high-pressure nitrogen (or medium-pressure nitrogen), immediately introduce nitrogen into the system to dilute and displace the gases
Pressure drops, combustible gas detection and alarms trigger, emergency pressure relief occurs, the system is filled with nitrogen as a substitute gas, the fire department is contacted, the area where the fire is located is covered to prevent it from spreading, and air respirators are worn to avoid poisoning
The on-site combustible gas alarm goes off; system pressure drops, and the amount of fresh hydrogen being supplied increases significantly. If the leak is located before the reactor, the bed temperature will rise further. Actions to take: Immediately activate the emergency pressure relief system, extinguish all flames in the vicinity, evacuate unrelated personnel from the area, set up barriers, call the fire department, and contact specialized teams for protection. Isolate various systems, and use steam to cover the area around the leak. Once the pressure drops below that of high-pressure nitrogen (or medium-pressure nitrogen), immediately introduce nitrogen into the system to dilute and displace the gases
Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate.
Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate.
1. Alarm from the on-site combustible gas detector. 2. Drop in system pressure. 3. Significant increase in the amount of fresh hydrogen being introduced. 4. If the leakage occurs before the reactor, the bed temperature will rise further. Actions to take: 1. Immediately activate the emergency pressure relief system. 2. Extinguish all sources of fire in the vicinity. 3. Evacuate unrelated personnel from the area and set up barriers. 4. Call the fire department and contact specialized teams for protection. 5. Isolate various systems and use steam to cover the area around the leakage point. 6. Once the pressure drops below that of high-pressure nitrogen (or medium-pressure nitrogen), immediately introduce nitrogen into the system to dilute and displace the gases
Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate.
Phenomenon: System pressure drops, the combustible gas alarm goes off; an immediate report must be made upon discovery during inspections. Treatment method: ① Emergency pressure relief of the hydrogen-containing system in the hydrogenation unit where the leak has occurred, and the leaking area is covered with steam. ②The hydrogen heating furnace is cooled down or completely shut down as appropriate. ③Stop the feed, water injection, and hydrogen supplementation to the hydrogenation unit where the leak is occurring. ④The fractionated product is transferred to the unqualified tank. ⑤Stop the circulating oil pump of the hydrogenation unit where the leak is located, as appropriate.