How is the problem of liquid in the constant head gas recovered constant head gas stream solved?
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Recently, a constant-pressure vapor recovery compressor was installed on the unit, but there is severe liquid presence at the inlet of the first stage; it is suspected that liquid has entered the second-stage cylinder. Currently, considering adding a cyclone separator ahead to remove as much of the C5 and C6 liquid phase as possible. However, it has been noted that there is still saturated water inside, and it is unclear how to deal with the liquid in the tanks later on. The pressure in the constant-pressure tower is not high, so self-pressurization is not an option; using nitrogen for pressurization could affect the operation of the unit. The initial idea is to install a small piston pump or diaphragm pump – I would like to hear everyone’s suggestions
Both gas pumps and liquid pumps have fixed applications; when the water content in the gas reaches saturation, a centrifugal gas pump is the safest choice. Also, is the gas that is extracted useful? And what about using it for the air intake pump after it has been dried? ?
Perhaps I didn’t explain myself clearly. The current goal is to separate components such as C2 and C3 from the normal overhead gas, and then compress them to obtain liquid hydrocarbons. However, the normal overhead gas also contains some C4 and C5 compounds as well as saturated water. Since we are using reciprocating compressors, it’s necessary to separate the liquid components as much as possible. Due to the low pressure, it’s difficult to separate the liquid phase in the separation tank; that’s why we are considering using a pump to extract the liquid. We are now looking for better suggestions regarding methods for separating gas from liquid, especially since dealing with saturated water presents a challenge
Perhaps I didn’t explain myself clearly. The current goal is to separate components such as C2 and C3 from the normal overhead gas, and then compress them to obtain liquid hydrocarbons. However, the normal overhead gas also contains some C4 and C5 compounds as well as saturated water. Since we are using reciprocating compressors, it’s necessary to separate the liquid components as much as possible. Due to the low pressure, it’s difficult to separate the liquid phase in the separation tank; that’s why we are considering using a pump to extract the liquid. We are now looking for better suggestions regarding methods for separating gas from liquid, especially since dealing with saturated water presents a challenge
The pump must work in conjunction with a level sensor; it starts pumping when a certain liquid level is reached. However, gas will inevitably escape, and it’s not clear what will happen if air gets trapped inside the pump! ! 2. Saturated water: First, heat the gas to render the saturated water unsaturated. Separate C4.5 again; I’m not very familiar with the liquefaction temperature of C45.
Regarding saturated water, if heating is applied followed by separation, it’s inevitable that more tanks will be needed. At present, there is a preference for a setup that requires less work and fewer additional devices; the more equipment there is, the more problems will arise later on. As for pumps, would it be better to use diaphragm pumps that are powered by air for pumping? After all, with the addition of a separation tank, it’s sufficient for the liquid level not to be too high; there’s no need to drain it completely
I forgot to mention that the amount of gas rising in the tower is a constant value. If you increase the pumping capacity, will that lead to an increased amount of gas rising, thereby affecting the tower’s operational conditions? Removing some water from the previous cyclone tank ensures the proper operation of the compressor (but water also needs to be drained regularly). I wonder if there is a possibility of reducing the temperature, as lower temperatures lead to a decrease in saturation level.
This pump is not a normally open pump; it draws liquid only when the tank level reaches a certain level. So the impact should be minimal; right now I’m just trying to see if anyone has better solutions.
Can we add a cold dryer to separate the water? !