In this paper, the design and operation of a novel coal-fired circulating fluidized bed (CFB) drum boiler that can generate superheated steam using saline water were introduced. The natural circulation water dynamics with a drum was adopted instead of the traditional once-through steam generator (OTSG) design, so that superheated steam can be generated for the better performance of the steam assisted gravity drainage (SAGD) technology in heavy oil recovery. The optimized staged evaporation method was proposed to further decrease the salinity of water in the clean water section of the boiler. The evaporating pipes of the salted water section were rearranged in the back pass of the boiler, where the heat load is low, to further improve the heat transfer safety. A CFB combustion technology was used for coal firing to achieve a uniform heat transfer condition with low heat flux. Pollutant control technologies were adopted to reduce pollutant emissions. Based on the field test, the recommended water standard for the coal-fired CFB drum boilers was determined. With the present technology, the treated recovery wastewater can be reused in steam-injection boilers to generate superheated steam. The engineering applications show that the boiler efficiency is higher than 90%, the blowdown rate is limited within 5.5%, and the superheat of steam can reach up to 30 K. Besides, the heavy oil recovery efficiency is significantly improved. Moreover, the pollutant emissions of SO₂, NO_x and dust are controlled within the ranges of 20–90 mg/(N·m³), 30–90 mg/(N·m³)and 2–10 mg/(N·m³) respectively.

本文介绍了一种新型的可利用盐水产生过热蒸汽的燃煤循环流化床（CFB）鼓式锅炉的设计和运行。采用带桶的自然循环水动力学代替了传统的直流蒸汽发生器（OTSG）设计，因此可以产生过热蒸汽，从而使蒸汽辅助重力排水（SAGD）技术在重油回收中具有更好的性能。提出了优化的分级蒸发法，以进一步降低锅炉净水区的水盐度。将盐水段的蒸发管重新布置在热负荷较低的锅炉后段，进一步提高了传热安全性。CFB燃烧技术用于燃煤，以实现低热通量的均匀传热条件。采用污染物控制技术以减少污染物排放。根据现场测试，确定了燃煤CFB鼓式锅炉的推荐水标准。利用本技术，处理后的回收废水可以在蒸汽喷射锅炉中再利用以产生过热蒸汽。工程应用表明，锅炉效率高于90％，排污率控制在5.5％以内，蒸汽过热度可达30K。此外，重油回收效率得到了显着提高。而且，SO的污染物排放 确定了燃煤CFB鼓式锅炉的推荐水标准。利用本技术，处理后的回收废水可以在蒸汽喷射锅炉中再利用以产生过热蒸汽。工程应用表明，锅炉效率高于90％，排污率控制在5.5％以内，蒸汽过热度可达30K。此外，重油回收效率得到了显着提高。而且，SO的污染物排放 确定了燃煤CFB鼓式锅炉的推荐水标准。利用本技术，处理后的回收废水可以在蒸汽喷射锅炉中再利用以产生过热蒸汽。工程应用表明，锅炉效率高于90％，排污率控制在5.5％以内，蒸汽过热度可达30K。此外，重油回收效率得到了显着提高。而且，SO的污染物排放 蒸汽过热度可达30K。此外，重油回收效率大大提高。而且，SO的污染物排放 蒸汽过热度可达30K。此外，重油回收效率大大提高。而且，SO的污染物排放_{如图2所示}，将NO _x和粉尘分别控制在20-90mg /（N·m ³），30-90mg /（N·m ³）和2-10mg /（N·m ³）的范围内。