新型海上稠油热采锅炉给水处理工艺的分析及研究

Analysis and Research of New Technology on Feed Water Treatment Process for Boiler Used in Offshore Heavy Oil Thermal Recovery

提出了一种新型的采用机械压汽蒸馏(MVC)技术处理海上稠油热采锅炉给水的工艺系统。针对新型工艺的出水水质、能耗、维护费用、占地面积等因素进行相应的分析,并与反渗透工艺作对比。分析结果显示,新型工艺对进水水质要求更宽松,出水总溶解固体(TDS)可达到5mg/L以下,相同条件下占地面积也较反渗透工艺降低20%以上,运行费用低,但MVC装置本身投资及能耗较大,亟待进行国产化研究。经分析,MVC技术可应用于海上生产水回用热采锅炉工艺。综合研究表明,MVC技术应用于海上稠油热采锅炉给水处理系统具有其可行性,且在该领域前景广阔。

A new kind of technology called mechanical vapour compression（MVC）is proposed for the feed water treatment process for boiler used in offshore heavy oil thermal recovery.The characteristics of this new technology are analyzed,such as treated water quality,energy consumption,maintenance cost and area covered,also,the new technology is compared with reverse osmosis（RO）technology.From the analysis results,compared with RO technology,the new technology can tolerate feed water of worse quality,total dissolved solid（TDS）of its treated water is less than 5 mg/L,and the area covered of new technology can reduce by more than 20% with less maintenance cost.However,the cost of MVC itself and energy consumption of this technology are high,and need to be localized.Through analysis,it is proved that MVC technology can be used in oilfield produced water recycling process for boiler used in offshore heavy oil thermal recovery.In conclusion,in the situation of offshore heavy oil thermal recovery,MVC can be used in feed water treatment process for boiler,and its application prospect is very broad.