电厂褐煤预干燥技术探讨

针对目前一些火电厂实行褐煤掺烧,因燃煤中水分过多致使锅炉负荷受到限制的问题,提出采用褐煤预干燥技术以降低燃煤外在水分,解决锅炉燃烧设备与褐煤水分高的矛盾。以1台300 MW机组1 025 t/h锅炉为例,给出了3种褐煤预干燥系统配置,并进行了运行经济性和安全性评估,供相关人员参考。

Exploration on Lignite Pre-drying Technology for Power Plants

Aiming at the problems encountered by some power plants practicing lignite co-combustion, namely that the boiler load is restricted due to excessive moisture in the fuel coal, the lignite pre-drying technology is proposed for the purpose of reducing external moisture of fuel coal, which solves the contradiction between the boiler combustion equipment and high moisture level of lignitous coal. Taking the 1 025 t/h boiler of a 300 MW unit as an example, three configurations of the lignite pre-drying system are provided, of which the operating economy and safety assessments are conducted, so as to provide reference for related personnel.