【Q&A Question 189】2018.07.13
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【Q&A Question 189】July 13, 2018: Briefly describe the factors related to fluctuations in pressure drop in the reaction system of a hydrogenation unit 1) Speed of the circulating hydrogen compressor, fluctuations in circulating hydrogen flow rate ； 2) Changes in the purity of recycled hydrogen ； 3) Changes in the processing volume of crude oil, changes in its composition, and whether water is present ； 4) Fouling and blockage at the reactor inlet ； 5) Local crushing and coking of the catalyst ； 6) Reactor airflow deviation ； 7) Heat exchanger leakage causing a short circuit ； 8) Salting, scaling, and blockage of heat exchangers and pipelines. (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 begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Fluctuations in reaction pressure, fluctuations in feed flow rate, blockages in the inlet and outlet pressure differences, water content in the raw material, problems with the catalyst bed
Fluctuations in reaction pressure, fluctuations in feed flow rate, blockages in the inlet and outlet pressure differences, water content in the raw material, problems with the catalyst bed
1) Speed of the circulating hydrogen compressor, fluctuations in circulating hydrogen flow rate； 2) Changes in the purity of recycled hydrogen ； 3) Changes in the processing volume of crude oil, changes in its composition, and whether water is present ； 4) Fouling and blockage at the reactor inlet ； 5) Local crushing and coking of the catalyst ； 6) Reactor airflow deviation ； 7) Heat exchanger leakage causing a short circuit ； 8）Salt and scale accumulation causing blockages in heat exchangers and pipelines
Answer: 1) Rotational speed of the cycle hydrogen compressor, fluctuations in cycle hydrogen flow rate； 2) Changes in the purity of recycled hydrogen ； 3) Changes in the processing volume of crude oil, changes in its composition, and whether water is present ； 4) Fouling and blockage at the reactor inlet ； 5) Local crushing and coking of the catalyst ； 6) Reactor airflow deviation ； 7) Heat exchanger leakage causing a short circuit ； 8) Salting, scaling, and blockage of heat exchangers and pipelines.
Fluctuations in reaction pressure, fluctuations in feed flow rate, blockages in the inlet and outlet pressure differences, water content in the raw material, problems with the catalyst bed
Fluctuations in reaction pressure, fluctuations in feed flow rate, blockages in the inlet and outlet pressure differences, water content in the raw material, problems with the catalyst bed
①An increase in reaction temperature leads to a higher cracking temperature, increased H2 consumption, and a drop in pressure. ②Fluctuations in the amount of fresh hydrogen or failures in the fresh hydrogen generator can cause pressure fluctuations. ③As the moisture content of the raw material increases, the pressure rises. ④Leakage in the heat exchanger where the reaction products exchange heat with recycled hydrogen, as well as in the high and low pressure heat exchangers, caused a drop in pressure. ⑤Cold high-pressure control failure
Fluctuations in reaction pressure, fluctuations in feed flow rate, blockages in the inlet and outlet pressure differences, water content in the raw material, problems with the catalyst bed
1) Speed of the circulating hydrogen compressor, fluctuations in circulating hydrogen flow rate； 2) Changes in the purity of recycled hydrogen ； 3) Changes in the processing volume of crude oil, changes in its composition, and whether water is present ； 4) Fouling and blockage at the reactor inlet ； 5) Local crushing and coking of the catalyst ； 6) Reactor airflow deviation ； 7) Heat exchanger leakage causing a short circuit ； 8) Salting, scaling, and blockage of heat exchangers and pipelines.
1) Speed of the circulating hydrogen compressor, fluctuations in circulating hydrogen flow rate； 2) Changes in the purity of recycled hydrogen ； 3) Changes in the processing volume of crude oil, changes in its composition, and whether water is present ； 4) Fouling and blockage at the reactor inlet ； 5) Local crushing and coking of the catalyst ； 6) Reactor airflow deviation ； 7) Heat exchanger leakage causing a short circuit ； 8) Salting, scaling, and blockage of heat exchangers and pipelines.