两种生物质燃料锅炉能效测试对比分析

Analysis on Thermal Efficiency Test for Kinds of Biomass Fuel Boiler

摘要: 分别对型号为DZL4-1.25-BMF以及DZG4-1.25-BMF的生物质颗粒锅炉进行能效测试，并对其进行正反平衡测试的结果进行分析。测试结果表示型号为DZL4-1.25-BMF的链条炉锅炉热效率(78.75%)相比型号为DZG4-1.25-BMF的固定炉排锅炉(70.10%)具有更高的热效率。在燃烧参数分析下发现，固定炉排锅炉在燃烧中存在排烟中一氧化碳含量过高，氧气量供应不足的情况；而链条炉排在燃烧过程中虽然有过量空气系数过高的情况出现，但相比固定炉排锅炉，改善了燃烧状况，降低了气体未完全燃烧损失。就型号为DZL4-1.25-BMF的锅炉能效测试数据情况而言，建议在运行过程中适当调节鼓引风量，降低过量空气系数，减少排烟损失，有利于提高锅炉热效率。

Abstract: Thermal efficiencies of Biomass fuel boilers of model DZG4-1.25-BMF and model DZL4-1.25-BMF were tested, respectively. Both of the thermal efficiencies were analyzed by methods of positive balance and counter balance. It was resulted that thermal efficiency of model DZL4-1.25-BMF (78.75%) was higher than the model DZG4-1.25-BMF (70.10%). According to the experimental data, an overhigh content of carbon monoxide in the exhaust gas was found in the model DZG4-1.25-BMF as shortage of oxygen occurred in the flame. But lower gas incomplete combustion loss was found in model DZL4-1.25-BMF though it performed a higher excess air factor during the test. It is suggested that it needs methods to decrease the excess air factor in order to increase the thermal efficiency of model DZL4-1.25-BMF.