Catalytic cracking unit, dry gas liquid separation tank
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What is the purpose of introducing steam twice into the dry gas separator tank in a catalytic cracking unit?_? If anyone knows, please tell me
Catalytic cracking dry gas contains large amounts of hydrogen sulfide, which causes severe corrosion of equipment and pipelines. When such gas is supplied as fuel to other users, it needs to be purified through alkaline washing; as a result, a small amount of alkaline solution remains in the gas. To prevent freezing, heating or heat tracing systems are typically installed in the dry gas liquid separation tanks and pipelines. In addition, the dry gas contains some ethylene. Although ethylene is stable, over time minor amounts of oligomers similar to those formed during deacetyleneation and hydrogenation reactions can appear – these are commonly known as \"green oil\" (soluble in oils). Green oil has high viscosity at room temperature, and to avoid pipeline blockages, it is necessary to heat it so that it can be removed along with the alkaline residues from the bottom of the liquid separation tanks. Therefore, heating systems are generally installed in liquid separation tanks.
Two: one is for supplying steam, and the other is for drain pipes.
I don’t know; there are two types of steam entering the dry gas separator tank – one is used for purging, and I’m not sure about the other one
Yes, it’s a drain pipe; there’s a drain valve at the back. I don’t know what its function is._? Can you tell me?
Looking at floor 4, in simple terms, it involves heating the dry gas to prevent it from containing liquid droplets (as liquids turn into gases), which could affect the furnace operation.
It seems that talking too much is indeed counterproductive; well, let me rephrase it. There are two types of steam: one is used for purging the tank before operation and after shutdown, while the other is used for heating the tank’s coil systems during winter. The steam enters from above and exits from below, and the stream equipped with a drain valve is the return water. :L
Heating steam is provided, and the dry gas liquid separation tank also has heating
Is the dry gas separator tank mentioned by the poster the one used to supply the auxiliary combustion chamber at startup?