（毕业设计论文）《220t／h燃煤锅炉掺烧焦炉煤气热力计算》.doc

220t/h燃煤锅炉掺烧焦炉煤气热力计算 Thermodnaimic calculations of blended Combustion of 220t/h coal bolier and coke oven gas 摘要 焦炉煤气和煤粉是两种形态完全不同的燃料，其燃烧过程和机理存在着很大的差异。在燃煤锅炉中即燃烧煤气，又不影响煤粉正常燃烧，保证锅炉额定出力， 是锅炉改造中必须解决的问题。 本文为减少焦炉煤气排放，节能降耗、改善环境，就煤粉锅炉掺烧高炉煤气技术，对锅炉大量掺烧焦炉煤气的利弊进行了分析，由于焦炉煤气的燃烧特牲与媒存在很大的差异，使原来按燃煤设计的锅炉掺烧媒气后锅炉参数产生很大的变化。为此在改造的热力计算中，将掺烧的焦炉煤气的燃烧计算折算成煤粉的燃烧计算，即将煤粉和焦炉煤气的混合燃料假想成一种全新的煤，这种假想煤的热力计算过程就是煤和焦炉煤气掺烧的热力计算，而假想煤的燃烧计算数值为煤和焦炉煤气分别计算数值的折算数值。本文对220t/h 煤粉锅炉掺烧45%焦炉煤气后各个受热面进行了热力计算加于校核。计算证明在不改变锅炉各个受热面布置的情况下，掺烧后锅炉完全能满足负荷的要求。 关键词：燃煤锅炉；焦炉煤气；掺烧；燃烧器 Abstract Coke oven gas and dust are two form completely different fuels, the combustion process and mechanism exist great differences. In coal-fired boilers burning gas, and in that does not affect the normal burning coal boiler, ensure rated output, is built in the must solve the problem. This article for reducing coke oven gas emissions, saving energy, improving the environment, the coal boiler blast furnace gas technology, mixed burn for boiler burning of coke oven gas mixed and analyzed the advantages and disadvantages of coke oven gas, because of the burning offerings and media, theres a large difference. The original design of coal-fired boilers by mixed burn gas boiler parameters after produce very big change. Therefore in the transformation of the thermodynamic calculation, the mixed burning coke oven gas combustion calculation of pulverized coal combustion commuted calculated, the upcoming pulverized coal and coke oven gas mixture fuel imaginary into a kind of brand-new coal, this imaginary coal thermodynamic calculation process is mixed burn coal and coke oven gas the thermodynamic calculation, and the numerical coal combustion hypothetical respectively for coal and coke oven gas conversion of the numerical valueThis article 220 t/h boiler of mixed coal burning coke oven gas heating 45% after the different thermal calculation and in check. Comput