循环流化床锅炉散热损失的测试与估算分析

发布时间：2018-11-20 07:42

【摘要】：现行国标和行业标准在估算循环流化床锅炉散热损失时认为分离器与锅炉本体散热强度相同,为衡量这种方法的合理性,对一台440 t/h的燃煤电站循环流化床锅炉进行了散热损失现场测试及不确定度分析。将锅炉系统外表面分成134块区域,共设置1 333个测点,最终测得锅炉系统的散热损失为0.731%,不确定度为0.08%,说明测试结果具有很高的精确度,而按国标和行业标准估算的散热损失值仅为0.432%。经分析,锅炉系统内锅炉本体、汽水系统、热风系统的散热强度相差较小,散热损失与其面积成正比,但绝热式分离器及回料系统的散热强度为前者的5倍,以16.2%的散热面积占据47.6%的散热量。因此国标和行业标准估算循环流化床锅炉散热损失的方法存在较大的系统不确定度。
[Abstract]:In estimating the heat loss of circulating fluidized bed boiler, the current national standard and industry standard consider that the heat dissipation intensity of separator is the same as that of boiler body, in order to measure the rationality of this method, A 440t / h circulating fluidized bed boiler of coal-fired power station was tested and its uncertainty was analyzed. The outer surface of the boiler system was divided into 134 areas and 1 333 measuring points were set up. Finally, the heat dissipation loss of the boiler system was determined to be 0.731, and the uncertainty was 0.08, which indicated that the test results had a high accuracy. According to national standards and industry standards, the value of heat loss is only 0.432. Through analysis, the heat dissipation intensity of boiler body, steam water system and hot air system in boiler system is relatively small, and the heat dissipation loss is proportional to its area, but the heat dissipation intensity of adiabatic separator and backfeed system is 5 times of that of the former. With 16.2% of the heat dissipation area, 47.6% of the heat loss. Therefore, the method of estimating heat loss of circulating fluidized bed boiler by national standard and industry standard has great system uncertainty.
【作者单位】：华北电力大学能源动力与机械工程学院;
【分类号】：TK229.66

【相似文献】