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经过长期的发展,当前典型的喷煤工艺流程是:中速磨制粉-热风炉废气+烟气炉-大布袋收粉-并联罐-直接喷吹-单管喷吹+分配器。系统改进的主要内容包括:扩大原煤仓和煤粉仓的容积、改进粉仓的结构、确定适宜的煤粉粒度、提高喷吹罐的初始流化效果、提高分配器的分配精度、改进喷枪材质和结构、完善安全监测控制系统、高温引风机和主排烟风机的变频调速等。需要正确处理系统节能、烟煤配比、固气比及均匀喷吹等问题。
After long-term development, the current typical coal injection process is: medium speed grinding powder - hot blast furnace exhaust gas + flue gas stove - big bag powder - parallel tank - direct injection - single pipe injection + distributor. The main contents of the system improvement include: expanding the volume of raw coal bunker and coal bunker, improving the structure of bunker, determining the proper pulverized coal particle size, increasing the initial fluidization effect of the puffer, improving the distribution accuracy of distributor, And structure, improve the safety monitoring and control system, high-temperature Fan and the main exhaust fan frequency control and so on. Need to correctly handle the system energy-saving, bituminous coal ratio, solid-gas ratio and uniform injection and other issues.