The Research Of High-speed Swirling Separator For Gas-liquid Two-phase Flow

In recent years, people have to find other energy products with the rise in oil prices ($110per barrel). And our country have productive natural gas. So the development and utilization of natural gas are very important. Im the gas industry, gas dehydration is the key step during technology of natural gas. Dehydration is based on the flowing two aspects:, dehydration is to prevent hydrate formation escape to blocking the piping and equipment so as to improve the transmission efficiency. in the other hand, CO2and H2S of the water and gas can form acid, this will corrode pipe and equipment, thus increasing maintenance costs. Because the traditional dehydration methods have many shortcomings, For example, the system complexity, high cost, large energy consumption. sometimes injecting chemicals lead to environmental pollution. Therefore,supersonic cryogenic liquid separation is recognized by domestic and international the experts in decade years. The technology have many merits: simple and reliabl,needn’t injecting chemicals, compact handy structure, good sealing property, supporting unmanned operation etc.so it is beneficial to protect the environment and save cost. Supersonic hydrocyclone separation technology cover comprehensive gas dynamics, thermodynamics and fluid mechanics theory. Inflation, low temperature will adiabatic condensate, hydrocyclone separation, deceleration extender pressure and other process focus on a airtight compact device.This paper first using relevant research results, combined with the characteristics of this device, Puts forward the design method, straight pipe separation design method, the Seattle segments of design, separator guide vanes material choice, With the focus on the rise pressure pipeline design method for analysis, Put forward the design diffuser should pay attention to the influence of shock and avoid boundary layer separation method. Because of laval nozzle is supersonic hydrocyclone separator key parts. Puts forward the design method, stable period laryngeal design method, contraction design method, the design method of expansion section. Nozzle exit airflow is uniform, and meet the prescribed Mach number, analyzes the internal physical properties change nozzle.In the end, the paper using computational fluid dynamics (CFD) software FLUENT, splitter on the supersonic flow field numerical simulation, and get the temperature, pressure and velocity variation. By changing the geometric model, the different geometry of the supersonic separation of its separation performance was analyzed. The results showed that the nozzle throat size can not shrink the length, length of the expansion nozzle, separator diffuser length, and the diffuser outlet diameter of the pipe internal flow characteristics of supersonic separation has little effect; expansion of outlet nozzle diameter, throat diameter and the length of separation of separation of supersonic flow characteristics inside of the tube have a major impact. Thus, according to the results of numerical analysis, can be on the gas-liquid two-phase high-speed cyclone separator the best design to provide reliable help.