减压阀计算

0.8MPa蒸汽（170℃）1.41万吨/年，折合约2吨/时蒸汽总管引一DN100的管道至装置管道直径/mm蒸汽压力/（绝压Mpa)1000.8650.551250.81500.8应选用CY43H－16活塞式减压阀DN125f＝60cm2管道直径/mm蒸汽压力/（绝压Mpa)1000.81000.81250.8应选用A43H-16C双弹簧微启式(h为1/20)安全阀,PN1.6DN100阀座喉径d0=80mm管道直径DN/mm疏水阀进口压力/Mpa疏水阀出口压力/Mpa250.750800.75015DN20CS41H-16C阀座号:5N4DN25CS41H-16C阀座号:5N8DN50CS41H-16C阀座号:7N16型号数量/个升降式H41W-16PDN651升降式H41W-16PDN501型号直流式T型过滤器PN2.5DN125法兰ZG3/4ST34C-H2.5球罐容积m3热效应引起的吸入量M3/h9.461.6915.892.8379.4914.15158.9828.3317.956.63476.9484.95635.93113.26794.91141.591589.83283.172384.74424.753179.65566.343974.57679.60100200300400500600700800呼吸气量（m3/h）球罐体积（热效应引起的呼吸气量0.8MPa蒸汽（170℃）1.41万吨/年，折合约2吨/时减压阀计算和选型蒸汽温度/℃蒸汽流量/(kg/h)170200080017050001705000安全阀计算和选型蒸汽温度/℃蒸汽流量/(kg/h)170200017020001705000应选用A43H-16C双弹簧微启式(h为1/20)安全阀,PN1.6DN100阀座喉径d0=80mm疏水阀计算和选型饱和蒸汽焓kcal/kg不凝气体饱和水焓kcal/kg654.9143.7673.4143.7最大排水量:500kg/h最大排水量:500kg/h最大排水量:1500kg/h止回阀选型过滤器选型呼吸阀选型闪点大于或等于38℃闪点小于38℃热效应引起的呼出量M3/h热效应引起的呼出量M3/h1.11.691.692.838.4914.1516.9828.333.9856.6350.9784.9567.96113.2684.95141.59169.9283.17254.85424.75339.8566.34424.75679.6球罐体积（m3）热效应引起的呼吸气量吸入量呼出量≥38℃呼出量38℃蒸汽密度/(kg/m3)蒸汽流速/（m/s)汽化热/(kJ/kg)4.11317.2067610920543.220.938286494.11327.5308177420544.11319.118623432054蒸汽密度/(kg/m3)蒸汽流速/（m/s)汽化热/(kJ/kg)4.11317.2067610920544.11317.2067610920544.11327.530817742054单位长度的钢管重量kg/m单位长度钢管的保温材料重量kg/m管道比热容kcal/kg.℃2.131.930.121.651.650.12阀后压力/Mpa0.350.60.6阀后工作压力/Mpa安全阀定压/Mpa微启式喉径/cm0.30.5838.596051250.30.4344.825242060.30.4370.87493079保温材料比热容kcal/kg.℃钢管升温速度℃/min保温材料升温速度℃/min0.252.50.252.5流体绝热系数k阀孔理论流量/kg/cm2.h实际流量/kg/cm2.h阀孔计算面积/cm21.135129.933579890.9535058821.989256831.13594.1870751647.0935375816.987468791.135129.933579890.9535058854.973142071.135119.32420759.6621035183.8052919全启式喉径/cm28.9258760633.5943536753.11733705单位长度散热量kcal/m.h管道长度/m开工时凝结水量kg/h正常工作时凝结水量kg/h50020001006012.311.32671615.孔径/cm5.2926174.6518918.36836210.33239减压阀计算和选型1流体经过减压阀节流排出的流量与流体的性质和状态有关，也与阀后、阀前的压力比值有关，压力比值越小，流量越大；但当压力比值达到临界压力比时，流量不再增加。2一般气体临界压力比σx＝（2/（1+k））^（k/(k-1)）k介质过热蒸汽饱和蒸汽1.135绝热指数k1.3过热蒸汽1.3σx0.545728压缩空气1.43需输入数据阀前压力P110kgf/cm2阀后压力P26.5kgf/cm2流体温度T573.15K流体流量Q1200kg/h气体常数R8.314kJ/mol.K流体分子量M18阀前流体的密度ρ3.701862kg/m3阀前流体的比容ν0.270134m3/kg流量系数C0.5（一般在0.45～0.6之间）4理论流量P2/P1σxP2/P1≤σx理论流量Ｇ445.8133kg/cm2.h5实际流量ｑ222.9067kg/cm2.h6阀孔面积ｆ5.383419cm2孔径d2.618087cmkkkppppvpkkG112/2121*1*8.9*2*3611112***8.9*36kkkvpkG流体经过减压阀节流排出的流量与流体的性质和状态有关，也与阀后、阀前的压力比值有关，