【Daily Question No. 285】October 18, 2018
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【Daily Question No. 285】October 18, 2018: Briefly describe how to handle the shutdown of the cyclohydrogen compressor during pre-vulcanization Cyclic hydrogen absorbs the heat released during the pre-sulfidation reaction; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclic hydrogen compressor fails during pre-vulcanization, first stop sulfur injection and reduce the reaction temperature. The new hydrogen compressor should continue to operate to supply fresh hydrogen, allowing the oil circulation for vulcanization to proceed while accelerating the cooling rate. The reaction temperature should be lowered to below 180°C until the compressor is able to operate again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reaction temperature stabilizes, sulfurizing agent injection is resumed to restart pre-vulcanization. (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
Stop feeding the heating furnace immediately； Cut off the sulfur injection process ； The field crew should hurry up and start the standby unit of the cyclic hydrogen compressor
If the recycled hydrogen and fresh hydrogen are considered as a compressor, how should it be handled?
If a fault occurs in the cyclohydrogen compressor during the pre-cooling period, sulfur injection should be stopped first; the system’s temperature and pressure should be reduced. The new hydrogen compressor should continue to operate to supply fresh hydrogen, and a high flow rate of oil should be used to accelerate the cooling process. The reactor should be cooled to around 205°C until the compressor is able to function again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reactor temperature stabilizes, injection of the sulfiding agent is resumed to restore presulfidation
Cyclic hydrogen absorbs the heat released during the pre-sulfidation reaction; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclic hydrogen compressor fails during pre-vulcanization, first stop sulfur injection and reduce the reaction temperature. The new hydrogen compressor should continue to operate to supply fresh hydrogen, allowing the oil circulation for vulcanization to proceed while accelerating the cooling rate. The reaction temperature should be lowered to below 180°C until the compressor is able to operate again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reaction temperature stabilizes, sulfurizing agent injection is resumed to restart pre-vulcanization.
Cyclic hydrogen absorbs the reaction heat released during pre-sulfidation; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclohydrogen compressor fails during pre-vulcanization, sulfur injection is stopped first; the system’s temperature and pressure are reduced, while the new hydrogen compressor continues to operate to ensure a supply of fresh hydrogen, and the cycle time is shortened through fractional distillation. Continue with high-volume circulation to accelerate the cooling rate; the reactor should be cooled to around 205°C until the compressor resumes operation. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reactor temperature stabilizes, DMDS injection is resumed to restart pre-vulcanization.
1. After the circulation machine trips, the feed pump and the new hydrogen generator shut down via interlock (in some cases, the new hydrogen generator operates at 0 load), and the heating furnace is turned off. At this point, the waste hydrogen line or an emergency pressure relief bypass line can be activated to allow gas flow to carry away the heat from the reactor. 2 After the new hydrogen machine trips, restart it and open the waste hydrogen line; the supplementary hydrogen from the new hydrogen machine is used to carry away the heat generated by the reaction.
Cyclic hydrogen absorbs the heat released during the pre-sulfidation reaction; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclic hydrogen compressor fails during pre-vulcanization, first stop sulfur injection and reduce the reaction temperature. The new hydrogen compressor should continue to operate to supply fresh hydrogen, allowing the oil circulation for vulcanization to proceed while accelerating the cooling rate. The reaction temperature should be lowered to below 180°C until the compressor is able to operate again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reaction temperature stabilizes, sulfurizing agent injection is resumed to restart pre-vulcanization. (Unless otherwise specified, all questions and answers are based on hydrogenation units.)
Cyclic hydrogen absorbs the heat released during the pre-sulfidation reaction; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclic hydrogen compressor fails during pre-vulcanization, first stop sulfur injection and reduce the reaction temperature. The new hydrogen compressor should continue to operate to supply fresh hydrogen, allowing the oil circulation for vulcanization to proceed while accelerating the cooling rate. The reaction temperature should be lowered to below 180°C until the compressor is able to operate again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reactor temperature stabilizes, sulfurizing agent injection is resumed to restart pre-vulcanization.
1. Stop sulfur injection, reduce the temperature and pressure of the system to ensure that the new hydrogen compressor continues to operate. 2. Increase the amount of oil used to lower the temperature as quickly as possible, to around 200 degrees, until the circulation pump starts operating. 3. After the temperature stabilizes, refill sulfur according to the actual conditions.
Cyclic hydrogen absorbs the heat released during the pre-sulfidation reaction; when the cyclic hydrogen supply is interrupted, the catalyst may experience overheating. If the cyclic hydrogen compressor fails during pre-vulcanization, first stop sulfur injection and reduce the reaction temperature. The new hydrogen compressor should continue to operate to supply fresh hydrogen, allowing the oil circulation for vulcanization to proceed while accelerating the cooling rate. The reaction temperature should be lowered to below 180°C until the compressor is able to operate again. When the compressor is restarted, closely monitor the temperature of the catalyst, and use cold hydrogen to control any hot spots if necessary. Once the reaction temperature stabilizes, sulfurizing agent injection is resumed to restart pre-vulcanization