Issues related to restarting the gas separation unit after maintenance
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After the gas system equipment is overhauled and put back into operation, once the system is airtight, can liquefied gas be directly introduced to displace the air? How does everyone start working? Please let me know, thank you
Before restarting a gas handling unit after maintenance, a thorough airtightness test is usually required to ensure there are no leaks. Before introducing liquefied gas to displace air, the equipment should first be purged of air using an inert gas such as nitrogen, in order to prevent potential safety risks. Only after confirming that the oxygen level inside the equipment meets safety standards should liquefied gas be introduced slowly to carry out normal production operations. The specific procedures may vary from company to company; it is recommended to follow the relevant operational guidelines set by the company. .
The entire process requires that various media interact without any chemical reactions occurring. For reference.
This post was last edited by JumpingWind001 on 2024-7-1 at 07:55. Nitrogen must be used as the leak-testing medium; otherwise, it’s difficult to reach the required pressure. Additionally, when introducing liquefied gas, it is essential to maintain a supply of heating steam to the reboiler at the bottom of the tower. Also, during shutdown, it is essential to maintain steam supply.
The bottom of the tower is a reboiler; how can it be a cooler? The bottom of the tower is used to heat the fluid
Thank you for the correction. You’re right; it’s indeed a reboiler. It’s essential to ensure a proper supply of heating steam, otherwise the liquid hydrocarbons will absorb heat and damage the reboiler
Do you mean to raise the temperature of the reboiler before the liquefied gas enters the tower? Or should the reboiler continue to supply steam when there is a liquid level at the bottom of the tower after the liquefied gas enters it?