What medium is generally used for the instrument reverse blowing air in a settler?
Thread Content
In catalytic cracking, what medium is generally used for the instrument reverse blowing in the settler? Is it still dry gas? Can wind be used?
I have never seen the use of steam for backwashing the instruments in settlers (it is likely to be difficult); inert gases or purified gas can be used instead. Using purified air is definitely an option, and most installations opt for purified air since its volume is small, so there is no need to worry too much about the risk of oil mixing with air.
We have two streams here: one is purified air, and the other is steam. Use air at startup, and switch to steam once normal operation is achieved.
Generally, it just uses instrument air to blow itself. . Hahaha. . . :lol
Wind, steam, and gas are all acceptable. The main purpose is to prevent blockages. Using wind: small volume, easy to obtain. Recommended. Steam: It is not energy-efficient, and the piping system is complex; poor insulation can lead to significant measurement errors. Gas: Not recommended. In the platform area of the reverse circulation system, the safety level for hot work tasks is relatively high, to be honest; however, if a large number of gas distribution points are introduced, it goes without saying that the safety level will decrease.
Generally, it is connected to purified air; steam is rarely used, and a small amount poses no danger
It’s all clean air; I’ve never heard of steam being used. Keep in mind that this is an instrument backflow air, not a loosening backflow air.
We have been using purified air; there is a process to use dry gas as a substitute for purified air, but it has never been used – blind flanges have been installed instead.
The backflow air is definitely purified air; air is generally used for this purpose
Generally, purified air is used; some manufacturers employ media such as dry gas or steam, but the results are not good and it is difficult to control the pressure.
We also use wind, the amount of oil and gas consumed is very small, and there is no danger involved
Here, we use purified air for the backflow ventilation of instruments.
Purified air is generally used; it is convenient to use, has stable pressure, and is easy to control
Purified air technology is still more mature
We also use purified air, and it passes through flow-limiting orifice plates; the volume is very small, so there will be no safety issues!
It is best to use purified air – it is safe and convenient
Be careful when using wind; regularly check that the orifice plate is not too large
First, nitrogen. It would be best if there is a nitrogen production unit. Secondly, for air purification, no additional equipment is required. Simple.
Instrument air, air – the volume is very small, no problem； I haven’t heard of any other media.
We only use wind here; there are no other pipelines
Wind is generally used more; some devices that use dry gas have such a process, but it is rarely used. If the dry gas pressure is unstable, the risk of an accident is high.