Simulation method of a straight-flow type gas-liquid cyclone separator
A technology of cyclone separator and simulation method, applied in design optimization/simulation, instrumentation, climate sustainability, etc.
Active Publication Date: 2019-03-26
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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[0004]
The flow inside the once-through gas-liquid cyclone separator includes complex flow and mass transfer phenomena such as the deposition of liquid droplets on the wall surface (forming a liquid film), the flow of liquid film on the wall surface, and droplet entrainment. The gas-liquid separation process is a complex two-phase three-field flow, in which the two phases refer to the gas phase and the liquid phase, and the three fields refer to the gas, liquid droplets and liquid film. At the same time, there is a complex mass transfer process between the three fields. The complexity of the process, there is no relevant report on the successful computational fluid dynamics modeling in the prior art
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[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0022] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings, as figure 1 Shown is a schematic flowchart of a simulation method for a once-through gas-liquid cyclone separator provided in an embodiment of the present invention, and the method includes:
[0023] Step 1. First, according to the theory of fluid mechanics, based on the Euler method, the gas phase governing equation ...
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The invention discloses a simulation method of a straight-flow type gas-liquid cyclone separator, which comprises the following steps: firstly, obtaining a gas phase control equation of gas phase three-dimensional strong swirl turbulence flow based on an Euler method according to a hydromechanics theory; Establishing a liquid drop motion equation based on a Lagrangian method; Obtaining a wall surface liquid film model equation capable of describing the flow of the liquid film based on the film hypothesis; Solving the gas phase control equation by adopting a three-dimensional unstructured gridfinite volume method to obtain gas phase flow field distribution; Carrying out explicit solution on the liquid drop motion equation to obtain a motion track of the liquid drop; Carrying out discrete solution on the wall surface liquid film model equation to obtain the thickness and speed distribution of the liquid film; Repeating the operation until the flow reaches a stable state; And carrying out post-processing on a result obtained by solving to obtain a gas-liquid separation performance parameter. According to the method, numerical prediction of the separation performance of the straight-flow type gas-liquid cyclone separator is achieved, and the separation performance of the straight-flow type gas-liquid cyclone separator can be conveniently obtained without tests.
Description
technical field [0001] The invention relates to the technical field of petroleum and natural gas, in particular to a simulation method of a straight-through gas-liquid cyclone separator. Background technique [0002] my country's deep-sea natural gas resources are extremely rich, and the exploitation of deep-sea natural gas has important strategic significance for ensuring my country's energy security. However, deep-sea natural gas exploitation is extremely difficult, and the recovery plan is not only different from land, but also very different from shallow sea. The international mainstream mining method is to adopt an underwater multiphase production system, and the underwater gas-liquid separator is its key equipment. The straight-through gas-liquid cyclone separator has the advantages of small pressure drop, compact structure and easy parallel connection. It has broad application prospects in gas-liquid separation. [0003] There are many factors affecting the separatio...
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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06Y02A90/10Y02T90/00
Inventor 邓雅军张琳李国龙宇波孙东亮
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY