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1、热量衡算1、配酸r98%H2SO43283.5kgJ98%HNO34364.9kg69%H2SO48193.0kg设To=25C,则Qi(H2SO4)0Ql(HNO3)0Ql=EGjCpj(tjt0)=G废酸C废酸(t废酸-to)=8193.02.707(4725)=399212.1KJQ3=Qr+Qs(Qr为化学反应热,此处为零;QS为物理反应热)Qs=理1+外2+zq$3+UqSO(qs,qs3为HS4的无限稀释热;q$2为HNO3的无限稀释热;qso为混酸的无限稀释热。)Qsi =23.7545 (IoO-W)W + 49.323.7545 (100-2)2 + 49.32=702.6
2、kj/kg(W为含水百分数)224.5646(IOo-W)4.5646(100-2)=-=436.6kj/kgw+49.322+49.3252_ 3.7545 (IoO-W)W + 49.322_ 3.7545 (100-31)31+49.32=222.6 kj/kgQso4.18A _ 4.18 214.867 B-x = 3.303 -0.675=341.8 kj/kg21.092 (100- 17) A 38.68- 0.2158214.86798.64 + 17B =38.68 - 0.2158 17=3.303硫酸含量0.98 3283.5 + 0.69 8193.0“ 一 硫酸含量
3、 + 硝酸含量一98 X 32835 + .69 X 8193.0 + .98 X 4364.9=0.675Q3=Q5=3283.5702.6+4364.9436.6+8193.0222.6-15841.4341.8=621873.7KJQd=WGiCpGi-I)=G混酸C混酸(t混酸一to)=15841.41.983X(35-25)=314135.0KJ由Q1+Q2+Q3=Q4+Q5+Q6得:Q2=Q40+0-Q1-Q3=314135.0-399212.1-621873.7=-706950.8KJ2、1#硝化釜的热量衡算Q甲笨=Q混酸=158414198=3926.7KJQ废酸=3758.8
4、X2.707X(4725)=183151.3KJQi=Q甲苯+Q废酸+Q混酸=3926.7+183151.3=187078.0KJQs=Qr+Qs混酸+循环废酸+水THNO3反+1#硝化釜废酸+Qs混酸:341.8X1584148=676823.8K)循环废酸:222.63758.8=836708.9KJ水:0HNO3ji:635.245646102=294657.9KJ98.4J1#硝化釜废酸循环废酸中H2SO4:68.4%HNO3:0.5%H2O:31.1%4.18AQs=-rB-X98.64+31.1B= =4.0638.68-0.215831.11.092(100-31.1)其中A=1
5、62.1638.68-0.215831.168.4x68.4+0.5=0.994.18X162.16故牛废酸:4.06-0.99=220.8 kJ/kg4.56461002qs ifir.= 463.89 kJ/kg98.41付硝化釜的废酸剩余总量:5423.5 kgh,其中H2SO4: 3679.9kgh- H2O: 1652.3kg/hHNo3: 91.3kg/h故其各自百含量为H2SO4: 67.8%H2O: 30.5%HNo3: 1.7%4.18A其中A=1.092(100-30.5) 2=164.3338.68-0.215830.4598.64+30.45B= =4.0238.68-
6、0.215830.4567.8x=0.9867.8+1.7.,4.18164.51故qs钮氽废酸=-226.0kJ/kg4.uz-u.y/Q5=8(1980.2341.5+3758.8220.8+0-444.7463.95421.4X226.0)=597188.9kJ则,Q3=Qs+Qr=597188.9+8793221.1=9390410.0kJ出料情况:总出料量:6522.6kgh出料温度:45Q4=WCpt=86522.62.133(45-25)=2226032.9kJ由Q+Cb+Ch=Q4+Qs+Q6,其中Qs=O,QeO所以,Q2=Q4-Q3-Q=2226032.9-9390410.0-187078.0=-7351455.1kJ