关键词: 燃油(气), 注汽, 锅炉, 稠油热采

Abstract: Oil/gas-fired steam generator is a new-type steam-generating equipment used for steam-injecting development at heavy oil fields. The combustion chamber of this equipment is in the form of single return (multi-return) coil-surrounded water-cooling wall for radiation heat absorption. The heating surface of the tail part adopts a combination of light pipes and finned tubes to absorb convection heat. The heat exchanger of boiler water is designed to raise feed water temperature of heating surface at the tail position and solve corrosion problem of heating surface dew point. The horizontal coil wall retaining-wall technology is invented to solve the bottleneck that high temperature causes damage of the finned tubes at the tail, thus improving heat-absorbing capacity of the boiler. The arch tube side flow deviation prevention technology is invented to prevent collapse of high-temperature flue gas returning chamber. The patent technology of insulation coating is developed to lower external surface temperature of boiler. To facilitate transportation of the large-scale boiler, the main body of the boiler adopts embedded technology to reduce the overall transportation size of the boiler to meet the requirements for movement. The product is stable in operation, reliable and safe, high in heat efficiency (the surface temperature of the main body is about 20℃ lower as compared to the production of the same category), and environmentally-friendly (no discharge of sewage). It can satisfy the requirements on heavy oil production process.

Key words: oil/gas fired, steam injection, boiler, thermal production of heavy oil