热泵提取含油污水余热技术的创新与应用

Innovation and application of heat pump to extract waste heat technology from oily sewage

大庆油田回注含油污水温度约为35℃,可利用含油污水余热总量巨大,同时,油田生产过程中掺水、热洗、采出液外输均需要加热升温,热量消耗量巨大,存在着巨大的开发利用空间。热泵技术是比较成熟的低温余热利用提取方式,大庆油田应用的热泵普遍存在运行稳定性差,制热能力衰减快的现象,导致热泵性能系数COP普遍较低,经济效益不佳。某油田通过技术攻关,开展提高热泵性能系数COP研究,创新开发了油田型双蒸发器含油污水直进热泵工艺技术,解决了高效稳定含油污水低温余热提取和热泵性能系数COP提高等技术难题,节能减排效果显著。

The temperature of oily sewage reinjection in Daqing oilfield is about 35℃,and the total amount of waste heat from the available oily sewage is huge.At the same time,in the production process of oilfield,water blending,hot washing and produced liquid export need to be heated up,so there is a huge heat consumption,which is a huge space for development and utilization.The heat pump technology is a relatively mature extraction method of low-temperature waste heat utilization.The heat pump applied in Daqing oilfield generally has the phenomenon of poor operation stability and fast decay of heating capacity,leading to low performance coefficient COP of heat pump and poor economic benefits.Through technical breakthroughs,an oilfield has carried out research on improving the COP of heat pump performance coefficient,and innovatively developed the process technology of direct injection of oily sewage into the heat pump through oil-bearing double evaporator,which has solved the technical problems of efficient and stable low-temperature waste heat extraction of oily sewage and improvement of COP of heat pump performance coefficient,and achieved remarkable energy conservation and emission reduction effects.