Purge before initial startup of gasification?
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This post was last edited by Comrade Lao Li on 2009-11-22 at 18:47. For initial startup of vaporization, is it only oxygen tubing and nitrogen tubing for purging, with water flushing being used for everything else?
High-flash vapor pipelines, steam pipelines, instrument gas supply pipelines, and instrument air also need to be purged. Other systems such as the fuel pipelines for oven heating likewise require purging. To establish a proper purging plan, it is first necessary to create a list of all vapor pipelines, and then determine the purging method and plan based on the available purging gas source and the diameter of the pipelines
What was said upstairs is correct. When the equipment is first put into use, it’s necessary to purge and replace the pipes and containers with nitrogen, as well as those instrument pipelines and similar components. It’s a hassle, but it’s extremely important as it determines whether the equipment will be able to function properly in the future.
When starting up the gasification unit for the first time, the pipes and containers are generally purged and replaced with nitrogen, and water-sealing tests as well as pressure testing for leaks are also carried out.
In principle, all equipment pipelines must undergo processes such as water washing, gas purging, hydrostatic testing, and pneumatic testing. For those for which such processes cannot be carried out, one or two of these steps can be omitted; however, wherever it is possible to perform these tests, they must be done in accordance with the established procedures. This is an important condition for ensuring the safe and smooth commissioning of a system. Some pipelines also require degreasing, acid cleaning, and passivation.
Do any of you marine friends have a gasification purge plan? How much time does it generally take for a gasification unit to go through purging, single-unit testing, commissioning, and then operation with feedstock?
5# wlq1970 Which pipelines require acid passivation? Could you explain it? Thank you