煤粉空气撞击射流点火研究

EXPERIMENTAL INVESTIGATIONS ON IGNITION OF PULVERIZED COAL-AIR COLLISION JET

一、前言 煤粉气流的点火是一个重要的煤粉燃烧现象,研究煤粉气流的点火规律,对于选择点火参数、改进燃烧器都有重要意义。研究点燃规律目的在于寻求有利的点燃条件、探明着火的临界条件。即使对单相气流的着 火问题,很大程度上还是依赖实验,

The ignition behaviours had been examined under various operating conditions, such as different collision angles between pulverized coal-air flow and oxygenace-tylene flame torch, different velocity, concentrations of coal/air mixture, and so on. The optimum ignition condition appears at a proper collision angle. The experimental results are in accord with that of theoretical analyses in non-isothermal jet theory.