爆破片的工藝計算

爆破片的工藝計算泄放量計算1.1無保溫層2.55x105尸xAo.82

w= H——l式中：W一泄放量，kg/h：斗一泄放條件下的汽化熱，kJ/kg：A一潤濕面積，m2；F一容器外壁校正系數(shù)，根據(jù)勞動部頒發(fā)的《壓力容器安全安全技術(shù)監(jiān)察規(guī)程》：容器在地面上無保溫：F二1.0；容器在地面下用砂土覆蓋：F二0.3；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人xA0.82w= Hxd式中：t一泄放溫度，‘C：入一保溫材料的導熱系數(shù);d0—保溫材料的厚度，m。泄放面積的計算2.1氣體的最小泄放面積、W ZTaZ x—55.8xCxCxP\M0C=\式中：a一最小泄放面積，mm2；W一額定泄放量，kg/h；C0—額定泄放系數(shù)；C一氣體特性系數(shù)。P。一背壓，MPa：k一絕熱指數(shù)；P一爆破片的設(shè)計爆破壓力，MPa；Z一氣體壓縮因子；T一容器或設(shè)備內(nèi)泄放氣體的絕對溫度，K；M一氣體的分子量。2.2水蒸汽的最小泄放面積W

a> 尸—尸 5.2xCxCxP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：過熱蒸汽的Cs查附表1。）2.3液體的最小泄放面積W

aZ 廣 5.2xCx&X\；pP式中：E—液體動力粘度的校正系數(shù)：P-液體密度，kg/m3。對于化學超壓過程，由于其機理復雜和工況繁多，需經(jīng)試驗才能確定所需的爆破片。

附表1：水蒸汽特性系數(shù)絕對壓為MPa出度C'C，200|22026Qhou|3戲3SO420460j500i 1|560|600|660700系數(shù)白0.5|1.00510.996血9?20.931o.m0.8W1.0135i!r!11!]0.97SO.98ED.98J0.93B0901?！?80838].50.9770.9760.9700.9470.9060.B720."20.9720.9670.955mi；M760.8450.&17D.7920.76S2.5"的!。的o9ia0.8&00.B4BO.B390793C'770309670.9570.924,10.8S50￡510.8220.7950.77407420.7230.6950.㈣一40.9650.95SQ.9J40.B940857(J一琲0.7990.7750.7440.7250696。碩J.。頓0.9530-9040.8650.S220.8D2077S0.7470.7230.697Q68160.96?09510.9110.S72Q.8JBD.8(J807?l0.7470.7290.6980.682_—7。.97】0.95B0,9240.8SI08t2.0.795090功(J,7Q2_O.$8?K09750,9?70VJ7。.煩0.S170.7fi90.75207JI107010w9!D.9M0,:}957D.H970"(J.IS220.7920.754(1.733(J.7IJ20.68$1()-U.9H6y.9ttD,9U90.S6J[J.R27(J.79ft0.757S350.70306K6□枷吵，().575().926O.S76G.KJW6.7620.7390.706O.6K8...L41.01(]10020.9560眄30.84608tt0.76S07430.711D.-69i_地】1)3610時H09腫D.技0.SI90.77J.0如H.7I40.6931』LO63|L00J0.9290.(730?2S0.779:O7510.7]70.6972D!,094LO280553。.眥.0,8350.736!Q.757072DQ.700221129J0720.9B20.90008輯0.7930.761QJ240.702L10160.915。，禎0.7970.7660.7270.7051.055Q.9350.87!0卯40.7720.73f0.704斐1.0960.9560.883j0.8￡r)0.776Q.7350.7W.3()1.1520.977"950.8210.7SI073507153211691.0090.908|0.894O.7S7o.皿iO.\4附圖1：1.$0,527—"1■1iak *一1頊—。50"——1.4