利用回流烟气加热一次风煤粉气流和提高一次风气流的煤粉浓度，都有利于锅炉燃烧的稳定。 开缝钝体燃烧器的设计综合考虑了回流加热和煤粉浓度局部富集。

Using recirculation flow to heat the primary air and increasing the concentration of pulverized coal in primary air really do good to boiler flame stability.

youdao

同一般天然气燃烧器相比，这种燃烧器既能产生二段燃烧，又能促进一定量的烟气回流。

Compared with other natural gas combustor, this combustor can generate the second combustion and form circumfluence of smoke.

youdao

热工制度上采用了高温烟气回流混合空气助燃方案，实现了高温空气燃烧。

High temperature air combustion is realized by adopting a new flue gas strategy.

youdao