【Q&A Question 039】2017.02.08
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This post was last edited by 955559 on 2017-7-21 at 21:46. [Q&A Question No. 039] Why is it said that high pressure followed by low pressure is to be avoided most in hydrogenation? The reference answer can be seen after *responding*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Since the pressure in the reaction systems of the hydrorefining unit is relatively high (>3.0 Mpa), while the pressure in the product systems is relatively low (0.2 Mpa), if high-pressure air enters the low-pressure system, it can cause overpressure in that system; in severe cases, this may lead to explosions and fires. Therefore, it is necessary to be familiar with all the areas where high pressure might enter the low-pressure system and the reasons for this, in order to prevent such situations from occurring. Petrochemical Area—“Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html The New Normal Cup—voting for the top 10 members of HaiChuan in 2016 is now underway; vote for the member you care most about (please cast your valuable vote for the members in the Petrochemical Area). http://bbs.hcbbs.com/thread-1667649-1-1.html Summary thread of Q&A questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657793-1-1.html Summary thread of daily questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657794-1-1.html Summary thread of Q&A questions from 2016 (all updates completed). http://bbs.hcbbs.com/thread-1597792-1-1.html Third round of selection for outstanding management members of HaiChuan. http://bbs.hcbbs.com/thread-1655902-1-1.html Petrochemical Area—“Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are up for grabs. Thread for collecting chemical industry technical materials in the “Petrochemical Section”. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you (Source: HaiChuan Chemical Forum)
The pressure in the reaction systems of hydrogenation refining units is relatively high, while the pressure in the product systems is relatively low. If high-pressure air mixes with low-pressure air, it can cause the low-pressure system to experience overpressure, which in severe cases can lead to explosions and fires. Therefore, it is necessary to be familiar with all the areas where high-pressure air may mix with low-pressure air and the reasons for this, in order to prevent such situations from occurring.
When high-pressure gas enters a low-pressure system, and given the limited pressure resistance of the containers and pipes in that low-pressure system, a large pressure difference between the two systems can cause the safety valve in the low-pressure system to activate, leading to leaks in the equipment and pipelines. Since the medium in these systems is flammable and explosive hydrogen as well as oil and gas, explosions and fires can easily occur. Therefore, the situation of high-pressure gas entering a low-pressure system in a hydrogenation plant constitutes a serious accident, and such incidents must be avoided.
It can cause voltage buildup in the low-pressure system; if the safety valve of this system does not activate in time, it can lead to severe damage to the equipment, or even an explosion.
When high-pressure gas enters a low-pressure system, and given the limited pressure resistance of the containers and pipes in that low-pressure system, a large pressure difference between the two systems can cause the safety valve in the low-pressure system to activate, leading to leaks in the equipment and pipelines. Since the medium in these systems is flammable and explosive hydrogen as well as oil and gas, explosions and fires can easily occur. Therefore, the situation of high-pressure gas entering a low-pressure system in a hydrogenation plant constitutes a serious accident, and such incidents must be avoided.
Since the pressure in the reaction systems of hydrogenation refining units is relatively high, while the pressure in the product systems is relatively low, if high-pressure systems are connected to low-pressure systems, it can cause overpressure in the low-pressure systems, leading to explosion and fire accidents in severe cases.
Since the pressure in the reaction systems of hydrogenation refining units is relatively high (>3.0 Mpa), while the pressure in the product systems is relatively low (0.2 Mpa), if high-pressure fluid enters the low-pressure system, it can cause overpressure in that system; in severe cases, this may lead to explosions and fires. Therefore, it is necessary to be familiar with all the areas where high-pressure fluid might enter the low-pressure system and the reasons for this, in order to prevent such incidents from occurring.
Connecting a low-pressure system to high voltage can cause the safety valve to activate and lead to fluid leakage; this is a serious accident that can easily result in fires and explosions
This causes the pressure in the low-pressure system to rise rapidly, increasing the risk of accidents.
Since the pressure in the reaction systems of hydrogenation refining units is relatively high, while the pressure in the product systems is relatively low, if high-pressure air enters the low-pressure system, it can cause overpressure in that system; in severe cases, this may lead to explosions and fires. Therefore, it is necessary to be familiar with all the areas where high-pressure air might enter the low-pressure system as well as the reasons for this, in order to prevent such incidents from occurring.