What medium is used for instrument backflushing of two catalytic cracking vessels?
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The backflush medium of two catalytic cracking reactor instruments generally has: Purify wind, dry air and steam. Our installation uses purifying air. In the past, the device used steam, which was not very effective and prone to clogging. Dear sea friends, what should you pay attention to when using steam as backflush medium?
Generally, purified air and steam are used, and steam is used on pipelines and equipment instruments connected to the reactor. When using steam as a backflush medium, it is generally necessary to control the water content of the steam. It can be used in high-temperature areas and then used as a backflush medium. ； You can also install a drain valve in front of the site of use.
Generally, purified air and steam are used. We are designed to use dry gas, but in practice it is rarely used.
We install both devices using purified air.
It is necessary to check frequently to keep the backflush unobstructed. It is best to set up more channels and switch them if they are blocked or malfunctioning.
Wind is best, clean and does not carry water. The steam must have a certain degree of superheat to be clean. In addition, the pressure difference between the backflush medium and the internal measuring point of the oil is limited. If it is too large, the accuracy decreases, and the steam pressure is usually at a high point.
We use non-purified air and superheated steam.