由锅炉热平衡计算可知:排烟损失(q_2)是锅炉热损失中最主要的一项,约为4％～8％,而影响q_2的主要因素是排烟温度和排烟容积。过于降低排烟温度将引起尾部受热面的金属耗量和烟气流动阻力的增大,还可能造成低温腐蚀。因此,如何合理降低排烟温度,需进行技术分析。 Calculated by the heat balance of the boiler, the loss of smoke (q_2) is the most important one in the boiler heat loss, which is about 4% -8%. The main factors affecting q_2 are the exhaust gas temperature and exhaust volume. Excessively lowering the exhaust gas temperature will cause increased metal consumption and flue gas flow resistance at the rear heated surface and may also cause low temperature corrosion. Therefore, how to reasonably reduce the exhaust gas temperature, the need for technical analysis.