50- Discussion on the design of gas separation skids for aromatic units in petrochemical enterprises using vertical gas coalescing separators
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This post was last edited by luoli519 on 2023-10-2 at 16:27. When using skid-mounted designs for the gas separation in refinery aromatic units, the gas-liquid coalescing separator requires a design layout that differs from that of the natural gas filtration separators discussed earlier; instead, a vertical structure is needed. Ask friends to discuss the design issues based on their own equipment and design experience.
We have previously had in-depth discussions on natural gas filter separators, the internal structure of coalescing separators, as well as the design and selection of their internal components. Furthermore, considering factors such as the ease of filter element replacement and maintenance, as well as the liquid storage capacity, it is recommended that when designing natural gas filtration and separation units and coalescing separators, a horizontal twin-tank structure be given priority.
As for the gas generated as a by-product of the refinery’s aromatic units, considering on-site modular construction, it is required that the gas separation equipment be designed in skid-mounted form as much as possible.
Skid-mounted equipment, emphasizing ease of assembly into skids and convenient transportation； Furthermore, it is required that the skid-mounted equipment occupy as little space as possible, thereby maximizing the utilization of space within the size constraints of the skid units.
It is based on these main factors that the gas filtering/coalescing separator on the gas separation skid requires a vertical layout. Regarding filter separators and coalescing separators, although they may appear similar in appearance, their air flow direction, working principle of the filter element compartment, filter element material, filter element structure, cost, and air intake arrangement are all different, so no further details will be provided here. Friends who are interested can discuss it with me privately.
This post was last edited by luoli519 on 2016-11-17 at 16:41. Additionally, it should be noted that although gas separation skids require vertical gas coalescing separators, the amount of gas and liquid carried by them should not be too high; otherwise, the overall height might exceed the limits set for such skids, causing various problems.
This post was last edited by luoli519 on 2016-11-17 at 16:42. Below are the operating parameters of the vertical gas coalescing separator in the aromatics unit of a petrochemical company in East China: 1. Component volume fractions (V%): Hydrogen – 14.33; Methane – 65.58; Propane – 3.093; Propylene – 0.082; Nitrogen – 8.15; Hydrocarbons with 6 carbon atoms or more – 0.145; n-Butane – 0.963; Isobutane – 1.41; Isopentane – 0.482; n-Pentane – 0.262; Alkenes – 0.116; Carbonyls – 5.3. 2. Operating pressure: 2.5 BarG; 3. Operating temperature: 55°C.
Its design requirements are as follows: 1. Separation efficiency: 3N level for removing liquid droplets and mist particles of 1 micron and larger size； 2. A vertical two-stage structure with a single cylinder layout is adopted.
The client did not provide any additional physical and chemical parameters related to the operating conditions; instead, they requested that the design team use a professional design calculation system to accurately determine the necessary physical and chemical parameters. They made it clear that they intended to verify the authenticity of the design team’s extensive experience in designing similar projects over the years.
This post was last edited by luoli519 on 2016-11-17 at 16:43. The image below is a 3D diagram of a vertical coalescing separation skid, designed and provided by a specialized dynamics separation technology company at the client’s request, for everyone’s discussion and reference:
This post was last edited by luoli519 on 2016-11-17 at 22:23. This diagram shows the dimensions of a vertical gas coalescing separator, provided by a specialized company in dynamics separation technology as part of its design package: