自然循環(huán)固態(tài)排渣煤粉鍋爐的熱平衡及燃料消耗量計(jì)算過(guò)程案例分析1理論空氣量及煙氣量的計(jì)算煤完全燃燒時(shí)需要的理論空氣量及燃燒產(chǎn)物的體積計(jì)算見(jiàn)表3-1（以1kg燃料為準(zhǔn)）。表3-1理論空氣量及煙氣量的計(jì)算1理論空氣量5.1822RO2理論容積0.8703N2理論容積4.0984H2O理論容積0.7245理論煙氣量5.6922煙道各處過(guò)量空氣系數(shù)及各受熱面的漏風(fēng)系數(shù)各受熱面的漏風(fēng)系數(shù)見(jiàn)表3-2。表3-2過(guò)量空氣系數(shù)和漏風(fēng)系數(shù)表名稱(chēng)符號(hào)制粉系統(tǒng)爐膛及屏式過(guò)熱器高溫過(guò)熱器低溫過(guò)熱器上級(jí)省煤器上級(jí)空氣預(yù)熱器下級(jí)省煤器下級(jí)空氣預(yù)熱器漏風(fēng)系數(shù)0.10.050.030.030.020.030.020.03入口空氣系數(shù)1.251.31.331.361.381.411.43出口空氣系數(shù)1.31.331.361.381.411.431.463煙氣特性鍋爐各部分煙氣特性數(shù)據(jù)見(jiàn)表3-3。表3-3煙氣特性表序號(hào)名稱(chēng)符號(hào)單位爐膛屏式過(guò)熱器高溫過(guò)熱器低溫過(guò)熱器上級(jí)省煤器上器空氣預(yù)熱器下級(jí)省煤氣下級(jí)空氣預(yù)熱器1入口系數(shù)-1.251.251.31.331.361.381.411.432出口系數(shù)-1.31.31.331.361.381.411.431.463平均過(guò)量空氣-1.2751.2751.3151.3451.3701.3951.4201.4454水蒸氣0.7470.7470.7500.7530.7550.7570.7590.7615煙氣容積7.1407.1407.3507.5087.6407.7727.9038.0356容積份額-0.1220.1220.1180.1160.1140.1120.1100.1087容積份額-0.1050.1050.1020.1000.7550.7570.7590.7618三原子氣體容積份額-0.2260.2260.2200.2160.2130.2090.2060.2039煙氣重量9.3129.3129.5839.7869.95510.12410.29310.46310飛灰濃度0.0320.0320.0310.0310.0300.0300.0294焓溫表計(jì)算不同過(guò)量空氣系數(shù)下燃燒產(chǎn)物的焓溫表見(jiàn)表3-4。1000Aarαfh/Qnet,ar=1000×31.66×0.95/19450=1.55>1.43,需計(jì)入飛灰焓。表3-4焓溫表煙氣溫度100170.0147.8642129.6531.0967150.5108.9528787.913780.724.2631132.4686.0881200357.5310.9497259.91065.0619304.5220.43951596.4510168.950.7910266.41380.4673300558.8486.0382392.01606.4035462.7334.96662427.4084263.379.2048402.72086.7649400771.9671.3903526.52157.5802626.2453.33073282.3012359.5108.1208541.82807.5720500994.4864.9184663.82720.2312794.9575.45924160.6089457.7137.6654684.23545.47946001222.71063.4913804.13295.1761968.9701.42465060.0921559.3168.2146829.74299.45087001461.91271.5449947.53882.82471148.8831.66135986.0309661.28198.8932978.35069.48638001704.91482.90371093.64481.53791334.4966.02446930.4660765.8230.32371129.15850.92209001952.31698.08961241.65088.03711526.11104.80357890.9302873.6262.75871282.36644.794310002205.51918.32021391.75703.14211722.91247.27478868.7371982.3295.44641437.37447.994111002458.42138.28991543.76326.033291925.11393.65529857.97841095.2329.39131604.18312.340712002716.62362.86951697.26955.07142132.31543.655410861.59631203.8362.07901753.49086.003513002976.72589.10171852.87592.7152172343.61696.623811878.44061358.5408.59601914.39919.77673514003239.02817.24742008.78231.58842559.21852.705112901.54091580.0475.22862076.210758.7318915003503.13046.95872166.08876.19882779.12011.899313935.05681755.6528.03182238.911601.8325916003768.83278.06172324.59525.72673001.82173.120514976.90901872.6563.23392402.912451.6698117004036.33510.73032484.010179.352653229.32337.816716027.89972060.7619.80882567.313303.579818004304.73744.18182643.710833.798153458.32503.627717081.60762230.2670.76222731.914156.5261819004574.13978.50302804.211491.522033690.42671.625018141.65002382.6716.61462898.815021.39120004844.24213.43312965.012150.475293925.62841.895519205.80392508.00754.33123065.615885.73764表3-4焓溫表（續(xù)表）溫度θ/℃Iy=Iy0+(α〞-1)IK0α〞lα〞gr,2α〞gr,1α〞sm,2α〞ky,2α〞sm1α〞ky11.31.331.361.381.411.431.46100993.741014.321069.211082.931103.512002010.592052.012121.032162.442190.052231.473003053.443116.043178.643220.383282.983324.723387.324004124.574208.804293.034349.184433.414489.564573.785005224.255330.625436.985507.895614.265685.166006349.936478.916607.896693.886822.877007506.887658.967811.057912.448064.528008685.748861.279036.809153.829009884.3710083.7110283.06100011103.1411326.58110012351.6812601.05120013587.4013859.98130014854.3715151.97140016129.1616451.92150017415.6117763.66160018712.4119085.96170020018.9720418.08180021328.5721753.26190022648.0723098.71200023971.5324448.10210025306.9625809.67220026639.1127167.925熱平衡及燃料消耗量計(jì)算鍋爐熱平衡及燃料消耗量計(jì)算見(jiàn)表3-5。表3-5熱平衡及燃料消耗序號(hào)名稱(chēng)符號(hào)單位公式及來(lái)源數(shù)值1燃料低位發(fā)熱值給定19450.002冷空氣溫度給定30.003冷空氣焓焓溫表205.834排煙溫度給定130.005排煙焓焓溫表a=1.361441.906氣體未完全燃燒損失%文獻(xiàn)[20]表7-270.007固體未完全燃燒損失%文獻(xiàn)[20]表7-262.008排煙]損失%5.759散熱損失%文獻(xiàn)[20]71頁(yè)圖4-40.6010飛灰份額-選定0.9511灰渣熱損失%不必計(jì)算0.001