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Design of mechanical seal used in carbonylation recycle pump |
He Yujie, Zhang Li, Huang Mingke, Liu Sanhua, Zhang Junhui |
(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract Aiming at the problem that the mechanical seal of domestic carbonylation circulation pump fails soon after putting into use in the process plant of acetic anhydride synthesis, the choice of sealing materials, transformation method for structural design, type and arrangement of auxiliary systems were proposed. Considered from economical aspect that combined the result of coupon corrosion test, Hastelloy B2 was adopted as structure material of the mechanical seal, and KALREZ as a secondary sealing material. In order to prevent the leakage of transportation medium that is flammable, explosive, toxic, highrisk(such as acetic acid, iodine, methane, hydrogen iodide, propionic acid, etc.), the mechanical seal was designed as cartridge cascaded balance type structure. PLAN 32+PLAN 54+PLAN 62 method was adopted on seal to improve the seal working condition. To control axial displacement of the first stage static ring, retaining ring and circlip were set up in front of it. The various parameters of secondary seal in higher pressure were reasonably selected and designed to ensure the pressure ability that the friction face can take and reduce the heat which was generated by friction. As a result, the service life and reliability of mechanical seal are greatly increased.
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Received: 21 October 2009
Published: 30 July 2010
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[1]亓新华,张玉泉,荆瑞俊.高硬度耐腐蚀纳米复合镀层的研究现状[J].腐蚀与防护,2007,28(7):329-332.Qi Xinhua,Zhang Yuquan,Jing Ruijun.Current research status of hard corrosion-resistant nano-composite coatings[J].Corrsion and Protection,2007,28(7):329-332.(in Chinese)[2]Wright F K,Cameron W.The design and seletion of materials for a general purpose mechanical seal[J].Materials and Design,1987,8(1):46-50.[3]王华,陈鹏.醋酸装置中的特殊材料[J].石油化工自动化,2007,44(5):26-29.Wang Hua,Chen Peng.The special materials used in the acetic acid unit[J].Automation in Petro-chemical Industry,2007,44(5):26-29.(in Chinese)[4]Zhou J F,Gu B Q.Heat-transfer character analysis of rings of mechanical seal[J].Chinese J Mech Eng,2006,42(9):201-206.[5]李振环.全氟醚橡胶的性能及应用[J].流体机械,2006,34(12):52-55.Li Zhenhuan.Performance and application of perfluo-roela stomers[J].Fluid Machinery,2006,34(12):52-55.(in Chinese)[6]American Petroleum Institute.API 682,Shaft sealing systems for centrifugal and rotary pumps[S].Third Edition.2004:112-114.[7]何玉杰,李质情,李强.高压锅炉给水泵流体动压密封的研究[J].水泵技术,2008(3):30-33.He Yujie,Li Zhiqing,Li Qiang.Analysis on hydrodynamic mechanical seals used in high pressure boiler feed[J].Pump Technology,2008(3):30-33.(in Chinese)[8]Nrtzel J P.Seal technology,a control for industrial pollution[J].Lubrication Engineering,1990,46(8):483-490.[9]王耀红,杨光.锅炉循环水泵机械密封设计探讨[J].排灌机械,2003,21(1):12-14.Wang Yaohong,Yang Guang.Design on mechanical seal for boiler cycle water pump[J].Drainage and Irrigation Machinery,2003,21(1):12-14.(in Chinese)[10]Xiong Shunhe,Salant R F.A dynamic model of contacting mechanical seal for down-hole tools[J].Journal of Tribology,2003(4):391-402. |
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