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热效率低、能耗高是目前乡镇企业工业锅炉的通病。主要原因是炉膛温度低。炉膛温度低的原因有:1.过剩空气系数太大;2.煤炭燃烧不充分,灰渣可燃物偏高;3.锅炉散热损失大。从设计上讲,炉膛出口过剩空气系数手烧炉一般为1.3～1.6;机烧层燃炉一般为1.2～1.4;煤粉炉一般为1.15～1.25。但从实测的各种炉型的过剩空气系数看,几乎所
Low thermal efficiency and high energy consumption are the common problems of township and township industrial boilers. The main reason is the low furnace temperature. The reasons for the low temperature of the furnace are as follows: 1. The excess air coefficient is too large; 2. The coal combustion is not sufficient, and the ash content is high; 3. The boiler has large heat loss. From the design point of view, the excess air ratio in the hearth at the outlet of the hearth is typically 1.3 to 1.6; the firing temperature in the hearth is generally 1.2 to 1.4; the pulverized coal stove is generally 1.15 to 1.25. However, from the measured excess air ratio of various furnace types, almost all