龙忠输气管道干燥剂的应用比选

289龙忠输气管道干燥剂的应用比选*()()()():,,2009,28(9)41~42针对我国川渝地区天然气多含H2SCO2等腐蚀介质的情况,研究了H2S和CO2的腐蚀机理和几种醇干燥剂的物理特性,旨在采取有效措施控制这类腐蚀以龙忠输气管道为例,从技术性经济性和抑制腐蚀三个方面比较分析了甲醇乙二醇和三甘醇作为干燥剂的可行性,指出乙二醇本身吸水性良好,成本低,可在一定程度上抑制H2SCO2的腐蚀,建议龙忠输气管道采用乙二醇作为干燥剂输气管道腐蚀干燥剂比较应用H2SCO2,,,,,,,,H2SCO2,一H2SCO2的腐蚀机理1H2S1CO2H2S,H2S,H2S,,,:H2S!H++HS-,HS-!H++S2-Fe+H2S+H2O!FeHS-(ads)+H3O+FeHS-(ads)!FeHS++2e-FeHS++H3O+!Fe2++H2S+H2OFe2++HS-!FeS+H+,H2S,,;S2-,,;,,2CO22,CO2,,:CO2(g)+H2O!CO2(sol)CO2(sol)+H2O!H2CO3!H++HCO-3DeWaard:H2CO3+e-!H+HCO-3,2H!H2:Fe!Fe2++2e-:CO2+H2O+Fe!FeCO3+H2CO2,(FeCO3)(CaCO3),,,3H2SCO22H2SCO2*063004,51;:13613330561∀41∀,,,GFierro,KMasamuraCO2H2S,H2S,H2SPH2S7#10-5MPa,CO2,60∃,FeCO3,H2S;CO2H2SPCO2/PH2S200,pHFeS,;CO2H2SPCO2/PH2S200,H2S,FeS,FeCO3,FeSFeCO3二龙忠输气管道干燥剂的应用(%)75.2km,UOEX52,559mm,3,11.914.310.3mm,8.4t,2.8t,11.2t31(1)技术特点11,,,,,,3,,,,(2)经济性,3~41500m3/s,(1.108MPa),1.5m/s,4d32120∃(mPa∀s)60∃(g∀cm-3)(∃)CH4O32.041.620.7920C2H6O262.0721.001.1088C6H14O4150.2047.801.092050~702(104/t)(104)(104)(104)0.9320.950.571.31.3032.665.898.42,,,,2H2SCO2[2],,H2SCO2,,,,,,,pH,,,CO2/HCO-3,pH,,,1,:CO2/H2S,,2003,24(7)2,():CO2,(),20023,:,,2004,23(6)(:20080728)∀42∀2009,1963,1988,,1984,2007,,1984,2007,,1982,2006(),(),,1972,2000,1984,2007,,,1980,2006,,1976,2007(),,1976,1998(),,1969,2005(),,1971,2004,,20094,1982,2008,20098,1982,2007,,1971,2004,,1966,2005,,1958,1983,1999,,1953,1983,,1973,1998(),20092,1968,1992,,1975,1997,2003,,,1956,1995,,1982,2005(),,∀79∀289