本文介绍了新研制的燃气流化床半预混金属风帽式布风板的结构及工作原理。这种布风板结构简单,操作方便,气体分布均匀。使用这种布风板,既解决了非预混式布风板气体混合不均匀、燃烧效率低的问题,又从根本上解决了预混式布风板在高温下长时间操作时的回火爆炸问题。该项成果已获得国家专利. This paper introduces the structure and working principle of a newly developed gas fluidized bed semi-premixed metal hood type air distribution plate. This cloth plate structure is simple, easy to operate, gas distribution. The use of such an air distribution plate not only solves the problem of uneven gas mixing and low combustion efficiency of a non-premixed distribution plate, but also fundamentally resolves the problem of tempering when the premixed distribution plate is operated at a high temperature for a long time Explosion issue. This achievement has obtained the national patent.