摘要
所报道的除氧防腐蚀剂XC 1,可用于压力 6 .5MPa以上 ,不能使用亚硫酸钠的蒸汽锅炉除氧。它以亚硫酸铵为主剂 ,复配以挥发性胺、成膜性胺、乳化剂等助剂 ,可迅速除氧并调节供水和蒸汽的pH值 ,防止高温腐蚀。探讨了亚硫酸铵的除氧机理及两种胺的作用。在室内考察了不同加量的XC 1对胜利现河 3号锅炉注汽转化水的除氧率 (煮沸 10分钟 ) ,加量 2 7mg/L时除氧率 98% ,加量 30mg/L时除氧率 10 0 %。在现河 3号锅炉上进行了连续 96h的现场试验 ,XC 1在热力除氧器换热器前加入 ,除氧温度 10 4℃ ,每 8h加药一次 ,加药量由 2 5mg/L增加到 30mg/L。当加量为 2 7mg/L时锅炉供水含氧量在 0 .1mg/L以下 ,考虑到除氧温度、压力可能波动 ,加量确定为 2 8mg/L ,这时供水含氧量 0 .0 0 3～ 0 .0 0 4mg/L ,过剩SO2 -3 含量在 1.6～ 3.6mg/L范围 ,锅炉进口供水pH值平均为 8.4,出口湿蒸汽 pH值平均为 10 .0 3。
Oxygen scavenger XC-1 is developed for removing dissolved O 2 in inlet water to steam boilers working at pressures >6.5 MPa, where Na 2SO 3 is unusable. XC-1 is composed of (NH 4) 2SO 3 and compounded with a volatile and a film-forming amines, emulsificator and other additives. XC-1 removes O 2 quickly and adjusts water alkalinity to below a specified pH value as to prevent water/steam corrosion. The O 2 removing mechanism of (NH 4) 2SO 3 and the functions of the amines are discussed in general. The O 2 removal rate of XC-1 for condensate from injection steam generator No3 at Xianhe, Shengli, is determined in laboratory and accounts 98% and 100% after water boiling in 10 min at XC-1 use level 27 and 30 mg/L, respectively. In 96 hrs' field trial on injection steam generator No3 at Xianhe, XC-1 is introduced into the system at the head of heat exchanger of thermal O 2 scavenger/apparatus of working temperature 104℃ every 8 hrs at use level increasing from 25 to 30 mg/L. With XC-1 of 27 mg/L the O 2 content in the water lowers below 0.01 mg/L. Considering possible temperature and pressure fluctuation, the optimal XC-1 use level of 28 mg/L is established and following data are obtained: O 2 content in the inlet water 0.003-0.004 mg/L; content of residual SO 2- 3 1.6-3.6 mg/L; average pH valve of the boiler inlet water 8.4 and of the outlet moist steam from boiler 10.03. These pH values are within the specified limits.
出处
《油田化学》
CAS
CSCD
北大核心
2002年第2期160-161,共2页
Oilfield Chemistry
关键词
高压锅炉
供水
除氧防腐蚀剂XC-1
亚硫酸铵
pH值调节
注水蒸汽
胜利现河油田
oxygen scavenger/corrosion preventor
ammonium sulfite
boiler inlet water
high pressure boiler
oxygen removal
pH control
industrial water treatment
injection steam
Xianhe oil field in Shengli
