爆破片的工藝計(jì)算

爆破片的工藝計(jì)算1泄放量計(jì)算1.1無(wú)保溫層2.55x105FxA0.82W= H——l式中：W—泄放量，kg/h：H[—泄放條件下的汽化熱，kJ/kg：A—潤(rùn)濕面積，m2；F—容器外壁校正系數(shù)，根據(jù)勞動(dòng)部頒發(fā)的《壓力容器安全安全技術(shù)監(jiān)察規(guī)程》：a.容器在地面上無(wú)保溫：F二1.0；b容器在地面下用砂土覆蓋：F二0.3；c.容器頂部設(shè)有大于10l/(m2?min)水噴淋裝置：F=0.6。1.2有保溫層2.61x(650-1)x九xA0.82Hxd l0式中：t—泄放溫度，'C：入一保溫材料的導(dǎo)熱系數(shù);d0—保溫材料的厚度，m。2泄放面積的計(jì)算2.1氣體的最小泄放面積、 W ZTan x55.8xCxCxP M0C=式中：a—最小泄放面積，mm2；W—額定泄放量，kg/h；c0—額定泄放系數(shù)；

C—?dú)怏w特性系數(shù)。P0—背壓，MPa：k—絕熱指數(shù)；P—爆破片的設(shè)計(jì)爆破壓力，MPa；Z—?dú)怏w壓縮因子;T—容器或設(shè)備內(nèi)泄放氣體的絕對(duì)溫度，K；M—?dú)怏w的分子量。2.2水蒸汽的最小泄放面積2.2水蒸汽的最小泄放面積、 Wa>5.2xCxCxP0s式中：Cs—水蒸汽的物性系數(shù)（蒸汽壓力小于16MPa（表）的飽和蒸汽，Cs~l：過(guò)熱蒸汽的Cs查附表1。）2.3液體的最小泄放面積a>5.2xa>5.2xCxgx：而0式中：g—液體動(dòng)力粘度的校正系數(shù)：P—液體密度，kg/m3。對(duì)于化學(xué)超壓過(guò)程，由于其機(jī)理復(fù)雜和工況繁多，需經(jīng)試驗(yàn)才能確定所需的爆破片。

附表1：水蒸汽特性系數(shù)絕對(duì)低力溫度忙:2001|2202&0130u1屮380420460j500i|560600|660700MFJ系過(guò)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麗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儷50.7620.7390.706O.6K8141,n161.0020.9560腳J0.84608lt0.76S0.7430.7110.69i16]1)360測(cè)09(]T0.JJ55OS190.77J.0(),?|40.6931寶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