Investigation And Safety Analysis On Novel Oil Testing Gas-liquid Two Phase Separator

Different from the traditional gas-liquid separator used for oil testing, which has manydisadvantages such as huge volume, low efficiency and small handling capacity, a new kindof gas-liquid separator with higher construction efficiency and lower cost is put forward inthis paper. Combing the method of experimental study and numerical computation,experimental study of structural design and parameters optimization of the new separator wascarried out. At the same time, the flowing law in the internal field by means of numericalsimulation and computational analysis were studied. The structure according to the study ofimpacts on separation performance was optimized and material for the new separator waschosen on the basis of the corrosion and wear evaluation. Then, the skid mounted structuredesign and preferred supporting programs for the attachments was determined. Finally, thenew gas-liquid separator could be used in industrial experiment.The experimental results showed that,with the new jacket cyclone, the flow rotation inthe separation space of the inner cylinder weakened, the turbulent loss decreased, the energyloss caused by the friction between fluid and wall was reduced, pressure dropped slightlylower compared to the reference structure; Under the high flow conditions, part of the airflowflow into the jacket region, turbulence degree of the fluid in the inner cylinder is reduced, thetrend of droplet crushing is also reduced. The separation efficiency improved significantly.Several parts of droplet in small particle size went into the jacketed region with airflow andgot secondary separation. When the liquid concentration near the entry was low, theseparation efficiency of slotted structure cyclone increased significantly compared to thereference structure.The numerical results showed that the droplets in jacket gas-liquid cyclone separatorexisted in a variety of trajectories. Droplets were captured not only when the entered the sumpthrough the outer cyclone, but also when flung to the outer separator. Separator probability ofthe droplet increases. The particle efficiency of jacket gas-liquid cyclone separator wasgenerally greater than the monolayer gas-liquid cyclone separator and the difference betweenthem gradually increased with the size of droplet increase. There was fragmentation andcoalescence phenomenon for the droplet in rotating flow field and the fragmentation of tinydroplet was more significant than coalescence phenomenon which was not obvious. Largeparticle droplets within the new jacket diversion gas-liquid cyclone separator located at theinner cylinder separation space. However, the tiny droplets always located in the jacket regionand exhaust pipe. The state of two-phase flow in the jacket gas-liquid separator between cut flow anddiversion flow were analyzed by method of CFD and the slotted form and structure wasoptimized. The CDF results showed that, the separation efficiency of diversion separatorsignificantly improved compare to the cut flow separator. But at the same time, the separationenergy consumption improved. So the diversion separator was always used in situation withlow quantity and high quality.From the distribution of shear stress and pressure on the wall we could see that on thebasis of conventional guide vane cyclone separator, the jacket gas-liquid cyclone separatormade parts of airflow and tiny droplets flow into the jacket space by mean of slotted. In thisway, to a certain extent we reduced the rotation strength of airflow in inner cylinder andreduced erosion and wear effects of the separator wall caused by gas-liquid two-phase flow. Injacketed diversion gas-liquid separator, the pressure on the inlet region, the intake collectionchamber, guide blade region and the inner cylinder at the wall in the separator was greaterthan other parts such as the inter wall of exhaust core pipe, sleeve as well as liquid collectionchamber. After optimized design, volume of the new gas-liquid cyclone separator was lessthan2.0m×3.0m×3.0m, its weight was less than2tons. Compared with the conventionalseparator, the new one could save more than30%of the cost. The industrial experimentalresults showed that handling quality of multiple parallel separator was more than200000m3/dand the separation efficiency could reach more than97%~99%.The above research provided a theoretical basis and foundation for the structure designof gas-liquid cyclone separator device structure and its related process optimization. It alsoinstructed the further application and transformation of the gas-liquid cyclone separatortechnology. At last, it will produce huge economic and social benefits.