火床炉前拱区流动特性的试验研究

Experimental Study on Characteristics of Flow Conditions in Front ArchRegions of Grade Stokers

火床锅炉燃烧高挥发份烟煤和气煤时严重冒黑烟是由于前拱区混合不良，解决问题的根本出路在于开发新的炉拱结构。该文作者从拱区流动特性方面对不同前拱结构进行试验研究。在此基础上，作者提出了带预燃室的消烟前拱结构，通过试验归纳了预燃室出口截面速度分布规律，并将其推广到后拱出口截面。

Abstract The reason of black smoke emission in case of firing high volatile bituminous or gas coal in grate fired furnaces lies in the unsatisfactory mixing in the front arch region. The final solution lies in the development of new types of arches, The author undertook experimental studies of the flow conditions with various front arch configurations, based on which, he proposes to use a front arch configuration with a smoke obliterating antechamber, and after having found the antechamber's outlet velocity distribution, he also applies it to the rear arch outlet.