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一些4t/h及以下的小型锅炉,在引风机出口烟道的连接上,存在不合理和不正确的设计安装问题。这些问题直接关系到锅炉的正常运行,甚至是锅炉烧正压、出力不足的主要原因。主要有以下几种。 (1)引风机出口烟道截面,未经计算就错误地随引风机的出口几何尺寸,而延伸接到烟囱上。例如2t/h炉的引风机出口尺寸为0.275m×0.2m,截面积为0.055m~2,烟气在此出口处的流速高达30m/s,如果烟道再经转弯,且有一定的长度,这段烟道的阻力至少在500Pa以上,就等于卡了引风机出口的脖子,必然流通不畅,而会造成锅炉冒正压运行。
Some small boilers of 4t / h and below have an unreasonable and incorrect design and installation problem on the connection of the draft fan exit chimney. These issues are directly related to the normal operation of the boiler, and even boiler burning positive pressure, the main reason for lack of output. There are several main. (1) Fan outlet flue section, uncalculated mistakenly with the draft fan outlet geometry, which extends to the chimney. For example, 2t / h furnace induced draft fan outlet size of 0.275m × 0.2m, cross-sectional area of 0.055m ~ 2, the flue gas at this outlet flow rate up to 30m / s, if the flue and then turn, and have a certain length , This section of the flue resistance at least 500Pa above, equal to the card pull the neck of the induced draft fan outlet, the inevitable poor circulation, but will cause the boiler to take positive pressure operation.