NB35-2原油供油改造项目
DE08026-CAL-CEP-IN-0001 REV.0
呼吸阀计算书 CALCULATION FOR PRESSURE/VACUUM SAFETY VALVE 项目号: MADE BY: 项目名: CHECKED BY: 位号: REVIEWED BY: 标准 API2000 DATE 计算参数 P1 正压力 PLUS. PRESSURE 1.213 P1' 负压力 MINUS PRESSURE 0.963 P2 背压力 BACK PRESSURE 1.013 △Po 允许超压百分数 ALLOWABLE OVERPRESSURE M 分子量 MOLECULAR WEIGHT 16.83 T1 排放温度 RELIEVING TEMPERATURE k 绝对压力指数 RATIO OF THE SPECIFIC HEATS 1.4 Q正 需要排量 REQUIRED CAPACITY 150.00 Q负 需要排量 REQUIRED CAPACITY 80.00 μ 粘度 Kv 粘度修正系数 VISCOSITY CORRECTION FACTOR T 入口绝对温度 ABSOLUTE TEMPERATURE 373 Z 压缩系数 COMPRESSIBILITY FACTOR 1 口径计算 SIZING Ac 所需流道面积 REQUIRED ORIFICE AREA Q正/(12503P1(k/MTZ(k-1)((P2/P1)2/k-(P2/P1)(1+1/k))1/2)= 2.127 Q负/(12503P2(k/MTZ(k-1)((P1'/P2)2/k-(P1'/P2)(1+1/k))1/2)= 2.315
Nm3/h Nm3/h
所以计算排量满足需要排量 THEREFORE CAPACITY IS ENOUGH 呼吸阀的选择 SELECTION FOR PRESSURE/VACUUM SAFETY VALVE 进口尺寸X流道尺寸X出口尺寸 INLET X ORIFICE X OUTLET 3" X 50 X 3" 进口连接 X 出口连接 INLET X OUTLET 150LB RF X 150LB RF Note:
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BarA BarA BarA
℃ Nm3/h Nm3/hm2
选择面积 SELECTION ORIFICE AREA 19.620 排量计算 CAPACITY Wdr 额定排量 RATED RELIEVING CAPACITY 12503P1A(k/MTZ(k-1)((P2/P1)2/k-(P2/P1)(1+1/k))1/2= 1383.80 12503P2A(k/MTZ(k-1)((P1'/P2)2/k-(P1'/P2)(1+1/k))1/2= 678.12