关键词: 蒸汽管道, 蒸汽干度, 压降, 导热系数, 注汽锅炉 

Abstract: The steam dryness is an important quality parameter of steam. The dryness of wet steam included in high-pressured and high temperature wet steam injected into the oil layers has the important influence to the extraction efficiency. In order to realize high quality control of steam dryness in the stream-injection boiler, a computation method of steam dryness was proposed. Through this method, the steam dryness along the pipelines was firstly calculated, then vapor temperature and heat loss in the pipelines were obtained. Finally, steam dryness at the random place in the pipeline was solved. The change situation of the steam dryness in steam pipeline system was studied, which provides the reference for the heating mining system technological design.

Key words: team conduit, Stream dryness, Pressure drop, Thermal conductivity, Stream-injection boiler