Which catalytic unit is used to send the non-condensable gas at the top of the stabilizer to the separator tank between the compressor stages?
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At present, the non-condensable gas from the top of our stabilizer is discharged into the gas pipeline network, which is a great waste. I’ve heard that in many plants, the non-condensable gas from the top of the stabilizer tower is sent to the separation tank between the compressor stages, while in other plants it is directed to the gas-liquid separation tank at the top of the distillation tower. I was wondering which catalytic unit is used to direct the non-condensable gas at the top of the stabilizer to the separation tank between the compressor stages. It would be great if you could tell me the name of the factory, so that I can go and learn from their experience. I humbly ask for your guidance; thank you very much!
I divide the non-condensable gas from the stabilizer top reflux tank into two streams: one is sent directly to the gas pipeline network for dry gas desulfurization, while the other goes before the condensate tank between the compressor stages. There’s nothing mysterious about this; just connect a wire to it.
Our factory’s liquefied gas tanks also have two lines: one leads to the fuel gas network, and the other leads to the separator tank between the compressors; that’s just how it’s designed. . . . . . :)
The reflux tank at the top of the stabilizer in this unit also has a line leading to the condensate tank between the compressor stages; under normal conditions, this line is closed, so no non-condensable gases are discharged.
Our three-stage device design features one line leading to the desulfurization system for dry gas, and another leading to the inter-stage separator tank of the compressor； The second stage is before entering the compressed rich gas cooler. It is recommended before entering the compressed rich gas cooler. Our team is preparing to add a line before the compressed rich gas cooler during the shutdown for maintenance
We go all the way to the compressor inlet and then all the way to the flare. Fully closed in normal mode.
Could you guys tell me which refinery it is? I want to go and see it at my own expense, purely out of personal interest.
Is that nothing? The newly added 500,000 units here are designed with two lines, one of which leads to the inter-stage liquid separation tank
The original poster doesn’t need to go through the hassle. In fact, installing an inter-stage cooler for the compressor is mainly to avoid waste – there’s nothing mysterious about it. Depending on the setup of your system, you just need to add a pipeline; choose the appropriate material and pipe diameter, etc. Additionally, the non-condensable gases from the gas stream can also be sent back to the compressor’s inter-stage cooler
What is the diameter of the non-condensable gas line in your unit? I’m afraid that it will affect the operation of the pressure compressor, and that would be troublesome
I divide the non-condensable gas from the stabilizer top reflux tank into two streams: one is sent directly to the gas pipeline network for dry gas desulfurization, while the other goes before the condensate tank between the compressor stages. Ningxia Pagoda Petrochemical’s 600,000 tons/year heavy catalyst reactor unit
:Victory: The non-condensable gas from the stabilizer top reflux tank of the catalytic unit at Shanghai Refinery is routed in two ways – one route leads directly into the gas pipeline network (not used under normal conditions), while the other route goes to the liquid separation tank at the inlet of the compressor. It is mainly to recover propylene from the non-condensable gas.
Go ahead and connect the pipelines without worry; there’s no problem
It can also be connected to the liquid separation tank at the compressor outlet
Upon reaching the compressor outlet, it is necessary to check what the pressure at that outlet is Generally, the pressure in the stabilizer top reflux drum is lower than the pressure at the compressor outlet!
Our non-condensable gas system has two lines: 1. It is connected to the dry gas flare line, and 2. it is connected before the rich gas inlet compressor. We usually use these two lines in order to prevent any loss of useful components
Initially, my catalyst was used in the gas pipeline network for dry gas desulfurization; later, an additional line was added before the liquid condensate tank at the compressor stage.