煤耗计算方法.docx

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1、附：煤耗计算方法实际煤耗计算主要计算每吨蒸汽耗燥，但这里有一个问题，即蒸汽热焙不同，故还需计算主蒸汽的热焙。主蒸汽热焙计算:一般为查表，如下表TZ0C89p/MPa101113145203448.643437.553426.313414.923391.673379.81522.53454.773443.793432.663421.393398.43386.685253460.893450.023439.013427.83405.123393.52527.534673456.243445.343434.313411.813400.355303473.113462.453451.673440.74

2、3418.493407.15532.53479.213468.663457.983447.173425.153413.945353485.33474.863464.283453.593431.83420.71537.53491.393481.053470.5834603438.433427.475403497.483487.233476.873466.393445.053434.2542.53503.563493.413483.143472.773451.663440.925453509.633499.583489.423479.143458.253447.63547.53515.73505.

3、753495.683485.513464.833454.315503521.773511.913501.943491.873471.393460.99但上述表格不简单做到软件中，故采纳下述近似公式h=aT2+bT+c其中：a(-0.00359640416667p2-0.0793492IOIl905p+0.433794715)103b=O.OO458O75258131p2+0.11346620045369p+1.69780348230859C=-1.48553113562p2-47.34479068358p+2531.74036890440这样计算出实时蒸汽热烯，取535C,9MP4时的蒸汽热燧为标准热焰，实时煤耗按下式计算实时煤耗（总/吨汽）=实际给煤X标准热涵 蒸汽流量X主蒸汽热涵由于煤质不能在线测量，这里给煤热值采纳反推法计算1 .由总风量和烟气氧含量计算实时总耗氧；2 .由实时总耗氧、实时总给煤计算实时吨煤耗氧；3 .由实时吨煤耗氧和碳氧关系计算实时给煤含碳量（实际上是烧碳量）4 .由实时给煤含碳量计算实时给煤热值。标准煤耗计算实时标准煤耗0吨汽）=实时煤耗X给煤含碳量这里实时给煤含碳量依据烟气氧含量反推，肯定值不肯定精确，但手、自动均采纳同样算法，主要用于相对比较。公式中0.84为标煤含碳量。