易挥发物质排放废气量的计算资料全.doc

易挥发有机物排放废气量的计算易挥发有机物排放是指无集中式排放口的一种排放形式这种形式的排放量计算与集中式排放计算是不同的,现加以介绍1.有害物质敞露存放的散发量计算有害物质敞露存放时,由于蒸发作用,不断地向周围空间散发出有害气体和蒸气,其散发量可用下列公式计算： Gs=〔5.38+4.1V〕PH·F·〔M〕0.5式中,Gs——有害物质的散发量,g/h； V——车间或室风速,m/s； PH——有害物质在室温时的饱和蒸气压力,mmHg； F——有害物质的敞露面积,m2； M——有害物质的分子量； 5.38、4.1——常数由物理化学可知,各种物质的饱和蒸气压力随温度而改变,它们之间的关系如下： lgPH=〔-0.05223A/T〕+B式中,T——有害物质的绝对温度,K； A、B——常数,可从一般的物理化学手册中查取,表1列出了常见有害物质的A、B值表1 常见有害物质A、B值物质名称分子式AB苯甲烷甲醇醋酸甲酯四氯化碳甲苯醋酸乙酯乙醇乙醚C6H6CH4CH3OHCH3COOCH3CCl4C6H5CH3CH3COOC2H5C2H5OHC2H5OC2H5341728516393244615033914391935110323025467747962686388028715800483309010772091352.液体〔除水以外〕蒸发量的计算本计算方法适用于硫酸、硝酸、盐酸等酸洗工艺中的酸液蒸发量的计算,其计算公式如下： Gz=M〔0.000352+0.000786V〕P·F式中,Gz——液体的蒸发量,kg/h； M——液体的分子量； V——蒸发液体表面上的空气流速,m/s,以实测数据为准,无条件实测时,可查表2,一般可取0.2-0.5； P——相应于液体温度下的空气中的蒸气分压力,mmHg。

当液体浓度〔重量〕低于10%时,可用水溶液的饱和蒸气压代替,查表3；当液体重量浓度高于10%时,可查表4、5、6、7 F——液体蒸发面的表面积,m3表2 槽边排风工艺槽产生有害气体计算参数工艺槽名称溶液名称主要成分含量〔g/L〕溶液温度〔℃〕液面风速〔m/s〕硫酸浸蚀硫酸50-25040-800.35盐酸浸蚀盐酸150-36010-350.30硝酸浸蚀硝酸40%-80%室温0.40铜与铜合金在硝酸和硫酸中浸蚀硝酸10%-50%室温0.40硫酸40%-60%0.40铸件浸蚀硫酸75%室温0.40氢氟酸25%混酸浸蚀硝酸20%室温0.40氢氟酸30%混酸浸蚀硝酸50-100室温0.35盐酸150-200磷酸浸蚀80-12060-80装饰镀铬铬酐250-36040-500.40硫酸镀硬铬铬酐180-25055-600.50硫酸镀铝锡合金硼氟酸60-100室温硼氟酸铅160-2000.40硼氟酸锡20-25氟硼酸盐氟硼酸铅250-3000.40镀铅氟硼酸60-120钢铸件退镍铬酸250-30020-280.35硼酸25-30铝合金硫酸阳极化硫酸100-20013-260.30铝合金铬酸阳极化铬酸35-4040+〔-〕20.35钢铁件化学抛光硝酸1%-4%硫酸20%-40%70-800.40盐酸7%-30%铜和铜合金化学抛光硝酸10%-15%磷酸50%-60%40-600.40醋酸30%-40%镍的电抛光硫酸70%-80%室温0.35铬酐3%-5%表3 硫酸溶液蒸气分压力〔mmHg〕浓度〔%〕温度〔℃〕10203040506070809010202530354045505560657075808.808.057.466.916.235.224.193.192.261.460.800.346.130.0416.7715.4414.4513.1611.589.848.006.174.442.821.610.590.280.0830.4228.0026.2823.9921.1918.1114.8311.528.375.443.211.310.580.1852.8748.7745.8641.9337.2331.9226.2820.6315.169.966.092.661.140.3888.4481.5976.8870.4962.8154.1244.8725.4326.3717.5810.925.002.200.77142.83131.92124.45114.44103.3488.9573.8058.8644.2229.8818.979.263.981.48223.42206.59195.14179.95161.49140.45117.7994.6571.5248.8431.5515.897.022.68339.47314.26297.57277.85247.86216.26184.17147.37112.5777.7751.1326.3612.004.77502.67465.86441.67409.07370.16324.42274.27223.99171.94119.8879.9243.1220.008.30表4 硝酸水溶液上面的HNO3与H2O的蒸气压〔mmHg〕浓度％温度〔℃〕2030405060708090P硝P水P硝P水P硝P水P硝P水P硝P水P硝P水P硝P水P硝P水1020304050607080901000.00.00.00.00.00.130.270.531.011.878.215.227.647.580.01282003074586750.00.00.00.110.250.511.001.873.386.057.113.223.841691131742673935800.00.00.170.360.751.482.805.109.015.55.810.819.533.556901432183254800.120.270.561.132.184.057.2512.520.934.24.27.94.425.042.570.01101702583830.410.841.663.105.689.916.827.543.769.53.05.610.313.131.051811922851.583.005.509.6516.527.143.367.51031522.204.107.4012.8021.8035.305686130192481424.541671061532303301.22.447220314873108112036621031572323384806750.00.01.32.44.06.510.016.02435注：浓度为重量浓度11 / 11表5 HCl水溶液液面上水蒸气和HCl气体分压〔mmHg〕浓度％温度〔℃〕015202530405060708090PHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2OPHClPH2O101418222628303234363840420.00.00.00.070.411.02.45.713.129.063.0130.02533.843.392.872.331.761.501.261.040.850.680.560.410.310.0020.0120.060.2941.473.367.616.836.87815830756010.79.658.266.755.214.543.883.252.702.191.751.371.060.0040.0190.0950.452.174.9010.623.550.510521039970914.613.111.39.37.216.325.414.553.813.102.512.001.560.0070.0320.1480.683.207.0515.132.568.5142277515900201815.412.69.958.577.526.375.354.413.602.882.300.0110.0500.2281.024.569.9021.044.5092188360627/26.8024.120.617.113.511.811.28.77.236.085.034.093.280.0.120.522.109.219.139。