青岛LNG接收站BOG工艺处理技术及优化方案
[Abstract]:LNG is one of the cleanest ideal energy sources in the global energy consumption due to its small size and easy transportation and storage. Qingdao LNG receiving Station is located in Dongjiakou Port of the Economic and technological Development Zone on the west coast of Qingdao City, Shandong Province. It is a key project of China's 11th Five-Year Plan and the first LNG receiving station of Sinopec. Qingdao LNG receiving station has been built in two phases according to market demand, and has been put into production in November 2014. The first stage project with a scale of 300 脳 10 ~ (4) t per year has been put into production, and the gas supply capacity has reached 40.5 脳 10 ~ (10) ~ 8 m ~ (-1) / a. At present, the construction scale is 500 脳 10 ~ (4) m ~ (3) per year, the gas supply capacity is 67 脳 10~8m~3 per year, the long-term construction scale is 1000 脳 10 ~ (4) t and the annual gas supply capacity is 135 脳 10 ~ (8) m ~ (3). The first stage project of the receiving station includes three 16 脳 10~4m~3LNG storage tanks, and a complete set of LNG station process engineering, including LNG unloading, gasification, pressurization, transportation, metering and so on. At the same time, the light hydrocarbon recovery system with rich liquid of LNG, which is now in production, has been put into production at the same time. The air separation system with the daily output of 600t (liquid oxygen, liquid nitrogen, liquid argon) and the public engineering system inside and outside the LNG station are used in LNG cold energy production. In this paper, the BOG process is introduced in detail, and the process of Qingdao LNG receiving station BOG is selected as the object of this study. The existing BOG treatment process is studied and analyzed by volume balance method and HYSYS as a calculation and simulation tool, and the BOG optimization scheme is established according to the actual operation of Qingdao LNG receiving station. Firstly, the research status of BOG process at LNG receiving station at home and abroad is investigated and analyzed, and the common BOG direct compression process and BOG recondensation process are analyzed and compared from the aspects of energy consumption and process. Secondly, the total amount of BOG produced by Qingdao LNG receiving station is calculated by using volume balance method to simulate the process parameters of each equipment under unloading and non-unloading conditions. Thirdly, from the thermodynamic point of view, through the production data from the receiving station to the end of August 2016, and the effect of the process parameters such as BOG processing capacity on the power consumption of the pump and compressor, and on the process performance parameters, The adaptability analysis of BOG process treatment at Qingdao LNG receiving station at present is carried out, and the problems existing in the current BOG process treatment mode are summarized, and the BOG optimization method is put forward from two aspects: reasonable configuration of equipment and adjustment of process parameters. Finally, in view of the influence of the comprehensive factors such as the ship docking examination and approval and the downstream market of Qingdao LNG receiving station on the BOG process processing, from the point of view of the process flow and structure design, The optimization scheme of BOG processing for Qingdao LNG receiving station has been formulated from several aspects, such as electrical telecommunication transformation, and the feasibility study of the scheme has been carried out from an economic point of view. According to the conservative estimate, the current treatment process has caused a large amount of emptying. The economic loss is up to 37.7 million yuan and will cause air pollution. The BOG process optimization scheme designed in this paper can save about 15.42 million yuan of production cost every year after it is put into operation, so that the equipment of the receiving station can run smoothly and economically.
【学位授予单位】:西南石油大学
【学位级别】:硕士
【学位授予年份】:2016
【分类号】:TE83
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