爆破片的工艺计算

爆破片的工艺计算1泄放量计算1.1无保温层2.55x105FxA0.82W= H——l式中：W—泄放量，kg/h：H[—泄放条件下的汽化热，kJ/kg：A—润湿面积，m2；F—容器外壁校正系数，根据劳动部颁发的《压力容器安全安全技术监察规程》：a.容器在地面上无保温：F二1.0；b容器在地面下用砂土覆盖：F二0.3；c.容器顶部设有大于10l/(m2•min)水喷淋装置：F=0.6。1.2有保温层2.61x(650-1)x九xA0.82Hxd l0式中：t—泄放温度，'C：入一保温材料的导热系数;d0—保温材料的厚度，m。2泄放面积的计算2.1气体的最小泄放面积、 W ZTan x55.8xCxCxP M0C=式中：a—最小泄放面积，mm2；W—额定泄放量，kg/h；c0—额定泄放系数；

C—气体特性系数。P0—背压，MPa：k—绝热指数；P—爆破片的设计爆破压力，MPa；Z—气体压缩因子;T—容器或设备内泄放气体的绝对温度，K；M—气体的分子量。2.2水蒸汽的最小泄放面积2.2水蒸汽的最小泄放面积、 Wa>5.2xCxCxP0s式中：Cs—水蒸汽的物性系数（蒸汽压力小于16MPa（表）的饱和蒸汽，Cs~l：过热蒸汽的Cs查附表1。）2.3液体的最小泄放面积a>5.2xa>5.2xCxgx：而0式中：g—液体动力粘度的校正系数：P—液体密度，kg/m3。对于化学超压过程，由于其机理复杂和工况繁多，需经试验才能确定所需的爆破片。

附表1：水蒸汽特性系数绝对低力溫度忙:2001|2202&0130u1屮380420460j500i|560600|660700MFJ系过Cs0.5|10051JL0.9960.931o.m0.8W1.0135i1'i11]Q.97SO.98ED.98J0.93BQ9010S6S0.838ii!].50.^770.9760.9700.9470.906O'.B?2084】20.9720.9670.9550.5120.S760.8450.&17D.7920.76S山疽09G09180.8&00.B4BO.B390793C770309670.9570.924■'0.8S50.S5I0.8220.7950.77407420.7210.69JQ.67940.9650.95SQ.9J40.B940157O.82«0.7990.7750.7+40.7250.6960680J.0附0.9530-9040.A650.8320.8D20.^7S0.7470.7230.6970仙16O.?6S05530.9110.S72Q.8JBD.8(J8o7&r0.7470.7290.6980.68270.^710.95B0.9240.8S1o.wO8t20-785107490HI(],7Q2O.$8?K0975O.[^709370KSKO.S170.7fi90.7526.?n07010丽9:}957().897(J.51560R21(J.7920.754O.7J3(J.7IJ20.68!1()-IJ.9H6y.9ttD.9U90.S6J[J.R2707960.7570/>350.70306K6【2乩啊9().575().926O.S760.H3S俪50.7620.7390.706O.6K8141,n161.0020.9560脚J0.84608lt0.76S0.7430.7110.69i16]1)360测09(]T0.JJ55OS190.77J.0(),?|40.6931宝I.06jJLOOJ0.9290.873O.«280.779:O7520.7170.6972(11.094f.O2805530.8S5.0,8350.736!Q.7570"0Q.70022I.i2910720.9B20.9000⑷0.7930.7610.7240.70210160.9150,⑹0.7970.7660.7270,7051.055Q.935Q.87E0仙0.7720.73f0.7041.0960,956I0.883j0.8£r)0.776Q.7350.1103()•1L1.1520.977