《锅炉节能技术监督管理规程》要求锅炉排烟处的过剩空气系数,层燃锅炉不大于1.65,本文拟就这一议题,笔者将多年的实践经验,简要介绍。1过剩空气系数的基本理念1.1煤碳在燃烧时的化学反应式C+O_2→CO_2+32860 kJ/kg2C+O_2→2CO+9267 kJ/kg S+O_2→SO_2+9040 kJ/kg1.2过剩空气系数的计算和确定性按理论公式计算非常复杂,不能解决生产中的实际问题,只有在正规的热工测试中才有用处。在生产中只能按近似值公式求之。α=RO_2/RO_(2实)RO_2——煤燃烧后生成三原子气体最大值,近似等于空气中21%氧;RO_(2实)——煤燃烧后生成三原子气体实际值,近似等于CO_2+SO_2。例如一台锅炉在运行中,利用奥氏分析仪测出的CO_2含量为15%,求α。α=21/15:1.4笔者早年在新乡电厂主管的4台锅炉,用此来控制 “Boiler Energy-saving Technology Supervision and Management Regulations” requires the boiler exhaust smoke excess air coefficient, the flame-retardant boiler is not more than 1.65, this paper is intended to be on this issue, the author will be years of practical experience, a brief introduction. 1 The basic idea of ​​excess air coefficient 1.1 The chemical reaction of coal in combustion C + O 2 → CO 2 + 32860 kJ / kg 2 C + O 2 → 2 CO + 9 267 kJ / kg S + O 2 → SO 2 + 9040 kJ / kg 1.2 Excess air The calculation and certainty of the coefficients are very complicated according to the theoretical formula and can not solve practical problems in production. Only in the formal thermal test is it useful. In the production can only be calculated by the approximate formula. α = RO_2 / RO_ (2) RO_2 - the maximum value of triatomic gas generated after combustion of coal, approximately equal to 21% oxygen in air; RO_ (2 real) - actual value of triatomic gas generated after combustion of coal, + SO_2. For example, a boiler in operation, the use of austenitic analyzer measured CO 2 content of 15%, seeking α. α = 21/15: 1.4 The author in charge of the early Xinxiang Power Plant 4 boilers, used to control