国产600MW机组超临界直流锅炉吹管工艺的研究

1前言锅炉蒸汽吹管是新建机组投运前的一项重要工序,其目的是为了清除在制造、运输过程中留在过热器、再热器系统及管道中的各种杂物,防止机组运行中过热器、再热器爆管和汽机通流部分损伤,提高机组运行的安全性。国内外目前主要有两种电站锅炉吹管工艺,即降压蒸汽吹管法和稳压

A Study of Steam Purging Techniques for a Chinese-made 600 MW Supercritical Once-through Boiler

Drawbacks and advantages of two main kinds of steam purging technique currently employed both at home and abroad for boilers,namely,pressure-reduction and stable-pressure methods,are compared and analyzed.On the first Chinese-made 600 MW supercritical once-through boiler with a recycle pump-based start-up system the feasibility of the stable-pressure steam purging technique was investigated through tests and computations with its technological procedures being designed.Moreover,some items to which due attention should be paid are discussed and explored.The present study can provide valuable reference data and information for the commissioning tests and operation of other types of supercritical boilers.