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《Natural Gas Industry》 2012-01
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Safe and efficient vent and flare technology for the purification plant dealing with over ten billions m~3 high-H_2S natural gas annually in the Puguang Gas Field,Sichuan Basin

Zhang Xiaogang1,Fan Dongli2,Liu Xinling1,Zhao Yi1,Liu Lu1,Chen Hongqi1(1.Puguang Branch of Zhongyuan Oilfield Company,Sinopec,Dazhou,Sichuan 636156,China;2.Logging Department of Zhongyuan Oilfield Company,Sinopec,Dazhou,Sichuan 636156,China)  
The Puguang gas purification plant has an annual dealing capacity of 12 billion m3 sour gas which contains 14.14% H2S,8.6% CO2,and 340 mg/m3 of the organic carbon content.To achieve safe releasing and highly efficient burning of a huge volume of vent gas from this purification plant,we optimized the whole high-and low-pressure vent lines and flare system.Totally different from the general design concept of "venting them all",the reasonable venting amount is designed to be 75×104 m3/h and many other new techniques are developed such as the high resistance of low temperature and fire rain,sealing of flare under high and low pressures,prevention of back fires during venting a huge volume of gas,triplet protective ignition,fluid seal,etc.Meanwhile,an efficient acid gas flare burner is imported to confirm the flare system to run safely and stably.Since being put into field practice,this flare system has been under steady operation with a high burning efficiency of more than 99.9%,which provides reference for building or re-building large-scale gas purification plants in other fields of China.
【Fund】: “十一五”国家科技重大专项“四川盆地普光大型高含硫气田开发示范工程”之“普光气田天然气净化配套技术”(编号:2008ZX05048-005)
【CateGory Index】: TE969
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