沼气工程热量衡算
- 海之魂
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2020-02-09 10:18:32
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沼气工程热量衡算沼气工程热量衡算一.沼气工程需热量计算沼气工程需热量计算1.1.罐体总热损值罐体总热损值根据我国的年平均温度,将沼气工程按照东北(0℃)、北方(10℃)、南方(15℃)三个地区考虑。厌氧罐容积(m3)东北(0℃)北方(10℃)南方(15℃)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)30031.211.41.3722.38.10.9817.86.50.7850045.316.51.9832.311.81.4125.99.51.1380062.222.72.7244.416.21.9435.513.01.55100071.726.23.1451.218.72.244115.01.80120081.829.93.5858.421.32.5646.717.02.05150089.232.63.9163.723.32.795118.62.232000114.341.75.0181.629.83.5765.323.82.86(1)厌氧罐罐体的理论热损失值Q1见表1:注:散煤的热值6000kcal/kg,按锅炉实际热效率53%计算,得到煤的热值为6000*4.178*0.53=13280kJ/kg;散煤价格1200元/吨。(2)由于实际安装过程对保温性能有影响,实际热损失考虑1.6的误差因子,则厌氧罐实际的热损失值见表2:厌氧罐容积(m3)东北(0℃)北方(10℃)南方(15℃)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)30049.918.22.1935.713.01.5628.510.41.2550072.526.53.1751.718.92.2641.415.11.8280099.536.34.3671.025.93.1156.820.72.491000114.741.95.0281.929.93.5965.623.92.871200130.947.85.7393.434.14.0974.727.33.271500142.752.16.25101.937.24.4681.629.83.572000182.966.88.01130.647.75.72104.538.14.582.2.物料加热所需热量物料加热所需热量公式:Q=Cm△t式中:C=4.2KJ/kg*℃;m为需要加热的物料量;△t为物料升高的温度。进料温度东北按照平均6度计算,北方按照10度计算,南方按照15度计算,对不同地区,不同规模的沼气工程,原料升温至35℃,物料加热所需热量Q2列于表3:厌氧罐容积(m3)每天进料量(t)东北(0℃)北方(10℃)南方(15℃)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)30015137.550.26.02118.643.35.1994.934.64.1650025229.383.710.04197.772.28.66158.157.76.9280040366.9133.916.07316.3115.413.85253.192.411.09100050458.6167.420.08395.3144.317.31316.3115.413.85120060550.3200.824.10474.4173.220.78379.5138.516.62150075687.9251.130.13593216.425.97474.4173.220.782000100917.1334.740.17790.7288.634.63632.5230.927.73.3.厌氧罐所需热量厌氧罐所需热量厌氧罐所需热量Q=Q1+Q2+Q3-Q4Q1——反应罐总热损失;Q2——原料升温所需热量;Q3——反应罐内水分蒸发带走的热量;Q4——厌氧反应放出的热量。反应罐内水分蒸发带走的热量Q3和厌氧发酵产生的热量Q4,两者都很小,并且相互抵消,可忽略不计。厌氧罐容积(m3)东北(0℃)北方(10℃)南方(15℃)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)每天耗煤(kg)每年耗煤量(t)每年燃煤费(万)300187.468.48.21154.356.36.75123.4455.41500301.8110.213.21249.491.110.92199.572.88.74800466.4170.220.43387.3141.316.96309.9113.113.581000573.3209.325.10477.2174
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