两类不同炉型烟气停留时间计算方法的探讨

Discussion on Calculation Methods of Flue Gas Residence Time for Two Types of Furnaces

我国相关标准规定,垃圾焚烧炉炉膛主控温度区容积要满足最不利条件下烟气在850℃以上停留时间大于等于2 s的要求。目前国内垃圾焚烧发电行业运行的机械炉排炉炉膛主控温度区主要有单一烟道和主副烟道两种类型。本文通过研究相关规范和结合这两类炉型特点,探讨了单一烟道和主副烟道烟气停留时间的计算,特别针对采用主副烟道的焚烧炉烟气停留时间如何满足850℃/2s要求进行计算起始点的分析研究,并对争议点给出了解决方案。

China s relevant standards stipulate that the volume of the main control temperature zone in the incinerator furnace should meet the requirements that the residence time of flue gas above 850℃is greater than or equal to 2 s under the most unfavorable conditions.At present,the main control temperature zone of mechanical grate furnace in domestic waste incineration power generation industry mainly has two types:single flue and main and auxiliary flue.In this paper,by studying the relevant specifications and combining the characteristics of these two types of furnaces,the calculation of flue gas residence time of single flue and main and auxiliary flue was discussed,especially for how to meet the requirements of 850℃/2s for the flue gas residence time of the incinerator with the main and auxiliary flue,the starting point of the calculation was analyzed and studied,and the solution to the controversial point was given.