常温空气无焰燃烧在燃煤锅炉煤改气中的应用

在燃煤锅炉的炉膛内安装常温空气无焰燃烧反应器,可将燃煤锅炉改造为燃气锅炉。计算表明与其它燃气锅炉以对流换热为主的热交换方式不同,该锅炉强化炉内换热,辐射换热量提高。实测结果锅炉热效率达到92.92%,比改造前提高30%以上,比现有同吨位的燃气锅炉高4%以上。由于锅炉实现了无焰燃烧,反应器温度分布均匀,尾气污染物排放远低于国家标准。

Application of Flameless Combustion at a Normal Air Temperature for a Coal-fired Boiler Being Converted to Burn Gas

By installing a flameless combustion reactor operating at a normal-air temperature in the furnace of a coal-fired boiler it is possible to convert a coal-fired boiler into a gas-fired one. Relevant calculation results show that as different from the predominant convection heat-exchange mode adopted by other gas-fired boilers, the furnace of the gas-fired boiler under discussion assumes mainly a radiation heat-exchange mode, thus intensifying in-boiler heat exchange. The actual measurement results indicate that a boiler thermal efficiency of 92.92% can be attained, over 30% higher than that of the boiler before modification and more than 4% higher than that of boilers with the same capacity currently available. As the boiler has realized a flameless combustion and the reactor has a uniform temperature distribution, the pollutant emission level of exhaust gases is far lower than that set by the applicable national standard.