| Along with the increase of exploitation of the resources at home and abroad, the development of oil and gas resources has gradually moving towards deep sea. In addition to conventional methods with land, offshore oil and gas resources development use some extra system because of its own characteristics. Firstly, the water content of gas is much larger than that on land, So it requires a larger dewatering equipment. Because of seawater, the rich MEG has a lot of salt (including the monovalent salts and bivalent salts), they would affect the reuse of MEG. So the system needs to add in desalted part of ethylene glycol regeneration system.In desalination process, the most important device is flash device. All the other devices support the flash device. And the flash device structure will directly affect the efficiency of the entire process. Therefore a reasonable design of flash equipment has very important significance for the entire process.Focus on the particularity of medium and operate condition, this paper makes a detailed research to the evaporate efficiency of medium under the operate condition, and determine the evaporate efficiency.Based on the materials and equipment parameters of PANYU PY34-1platform. Combined with experiment, this paper divides the flash device into two parts:Gas phase section and liquid phase section, design and research them separately. The gas phase section is divided into entrance section, transition section and horizontal section separately and put forward the width and height of the entrance section and wall extends range, wall extends range and tilt angle of transition section, wall extends range and the distance between wall and horizon plat of horizontal section, and put forward the design suggestion to each section, In the liquid section, the main research is the flowing state of liquid in the device and the particle trajectories of salt. According to the simulation result to design appropriate forms and position of circulation exit. |
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