smoke arch的意思|示意

The appearance of black smoke in grate furnaces is due to insufficient mixing, the crux of which lies in the furnace arch.

火床炉冒黑烟是一个混合不良问题，而混合的关键在于炉拱。

This paper has mainly introduced when using arch tube-plate and screw smoke-tube to reform the DZ-type horizontal packaged boiler. Good results of saving on energy has been got.

文章介绍了采用拱形管板和螺纹烟管技术对DZ卧式快装锅炉加以改造，取得良好节能效果。