蒸汽管道壓力降計算書

標(biāo)準(zhǔn)實用蒸汽管路計算說明1、輸入?yún)?shù)物料名稱 過熱蒸汽質(zhì)量流量WG 54000kg/h始端溫度t1 315℃始端壓力P1 3600kPa2.管路長度根據(jù)實際管路布置（如圖 1），大減溫減壓系統(tǒng)支路從試驗廠房蒸汽入口到N3噴口按調(diào)節(jié)閥分為六段進行計算 。圖1 管段軸測圖文檔大全標(biāo)準(zhǔn)實用表1管路長度（不包含調(diào)節(jié)閥）A→BB→CC→DD→EE→FF→G項目當(dāng)量長當(dāng)量長當(dāng)量長當(dāng)量長當(dāng)量長當(dāng)量長數(shù)量(個)數(shù)量(個)數(shù)量(個)數(shù)量(個)數(shù)量(個)數(shù)量(個)度(m)度(m)度(m)度（m）度（m）度（m）管道規(guī)格DN200DN200DN200DN250DN250DN250管道徑d（m）0.19410.19410.19410.2480.2480.248直管段l（m）5.958.724.1819.44516.702.76彎頭45°13.968彎頭90°15.823423.292211.646322.32214.8817.44標(biāo)準(zhǔn)三通（直通）13.88213.88229.9229.9214.96標(biāo)準(zhǔn)三通（分枝）111.65截止閥(全開)158.23止回閥124.80截面積變化12.72總長度L（m）70.0047.5419.7151.6966.331.85文檔大全標(biāo)準(zhǔn)實用3.按等溫流動計算A→B段：設(shè)調(diào)節(jié)閥B閥前壓力P2=3550kPa過熱蒸汽密度11(0.461t126.1)0.00971.324105tP14.319kgm314.105kgm3因此m14.10514.31914.10514.176kgm33查得過熱蒸汽粘度 μ=0.0204mPa.s雷諾數(shù)Re354Wd354540004.83106G194.10.0204取ε=0.2mm，則ε/d=0.2/.1=0.00103查《HG-T20570.7管道壓力降計算》圖得，λ=0.0205摩擦壓力降3LW2Pf6.2610gGd5m6.261039.810.020570540002194.1514.17665.80kPaP2=P1-△Pf=3600-65.80=3534.20kPa與假設(shè)相符。計算結(jié)果P2=3534.20kPa，△Pf=65.80kPa設(shè)調(diào)節(jié)閥B閥后壓力為P3，根據(jù)供貨商資料：wKvPP')12P15.67(0.42P式中：Kv為調(diào)節(jié)閥一定開度下的流量系數(shù)，此處按全開計算，下同； P和P’文檔大全標(biāo)準(zhǔn)實用分別為閥前和閥后壓力， Bar；w為流量，kg/h。對公式進行整理得：PPP'w220.2436P816.48PKv帶入P2，計算得△P=904.79kPa，P3=P2-△P=2629.41kPaB→C段：設(shè)調(diào)節(jié)閥C處閥前壓力P4=2560kPa過熱蒸汽密度11(0.461t126.1)0.00971.324105tP3310.240kgm49.955kgm3因此m10.050kgm3查得過熱蒸汽粘度 μ=0.0207mPa.s雷諾數(shù)Re354Wd354540004.75106G194.10.0207取ε=0.2mm，則ε/d=0.2/.1=0.00103查《HG-T20570.7管道壓力降計算》圖得，λ=0.0206摩擦壓力降3LW2Pf6.2610gGd5m6.261039.810.020647.54540002194.1510.0563.34kPaP4=P3-△Pf=2629.41-63.34=2566.07kPa與假設(shè)相符。計算結(jié)果P4=2566.07kPa，△Pf=63.34kPa設(shè)調(diào)節(jié)閥C閥后壓力為P5，根據(jù)供貨商資料，整理的公式：文檔大全標(biāo)準(zhǔn)實用PPP'w220.2436P816.48PKv帶入P4，計算得△，54△P=1880.57kPaP=685.50kPaP=P-C→D段：設(shè)調(diào)節(jié)閥D處閥前壓力P6=1840kPa過熱蒸汽密度11(0.461t126.1)0.00971.324105tP57.208kgm367.046kgm3因此m7.100kgm3查得過熱蒸汽粘度 μ=0.0207mPa.s雷諾數(shù)Re354Wd354540004.75106G194.10.0207取ε=0.2mm，則ε/d=0.2/.1=0.00103查《HG-T20570.7管道壓力降計算》圖得，λ=0.0206摩擦壓力降3LW2Pf6.2610gGd5m6.261030.020619.715400029.817.1194.1537.17kPaP6=P5-△Pf=1880.57-37.17=1843.40kPa計算結(jié)果P6=1843.40kPa，△Pf=37.17kPa設(shè)調(diào)節(jié)閥D閥后壓力為P7，根據(jù)供貨商資料，整理的公式：PPP'w220.2436P816.48PKv帶入P6，計算得△P=533.14kPa，P7=P6-△P=1310.26kPa文檔大全標(biāo)準(zhǔn)實用D→E段：設(shè)調(diào)節(jié)閥E處閥前壓力P8=1280kPa，t8=℃（根據(jù)供貨商資料，減溫器進出口壓損可忽略。出口溫度為過熱 5℃）過熱蒸汽密度11(0.461t126.1)0.00971.324105tP6.311kgm36.159kgm3因此 m 6.209kgm3查得過熱蒸汽粘度 μ=0.0157mPa.s雷諾數(shù)Re354Wd354540004.91106G2480.0157取ε=0.2mm，則ε/d=0.2/248=0.000806查《HG-T20570.7管道壓力降計算》圖得，λ=0.0194摩擦壓力降2P6.26103gLWGfd5m6.261030.019451.695400029.816.209248530.83kPaP8=P7-△Pf=1310.26-30.83=1279.43kPa與假設(shè)相符。計算結(jié)果P8=1279.43kPa，△Pf=30.83kPa設(shè)調(diào)節(jié)閥E閥后壓力為P9，根據(jù)供貨商資料，整理的公式：PPP'w220.2436P816.48PKv帶入P8，計算得△P=432.82kPa，P9=P8-△P=846.61kPaE→F段：設(shè)調(diào)節(jié)閥F處閥前壓力P10=780kPa文檔大全標(biāo)準(zhǔn)實用過熱蒸汽密度11(0.461t 126.1) 0.0097 1.324 105tP94.014kgm3103.690kgm3因此m3.798kgm3查得過熱蒸汽粘度μ=0.0158mPa.s雷諾數(shù)Re354Wd354540004.88106G2480.0158取ε=0.2mm，則ε/d=0.2/248=0.000806查《HG-T20570.7管道壓力降計算》圖得，λ=0.0195摩擦壓力降3LW2Pf6.2610gGd5m6.261039.810.019566.354000224853.79864.98kPaP10=P9-△Pf=846.61-64.98=781.63kPa計算結(jié)果P10=781.63kPa，△Pf=64.98kPa設(shè)調(diào)節(jié)閥F閥后壓力為P11，根據(jù)供貨商資料，整理的公式：'w2PPP20.2436P816.48PKv帶入P10，計算得△P=388.72kPa，P11=P10-△P=392.91kPaF→G段：設(shè)管道出口G處壓力P12=320kPa過熱蒸汽密度文檔大全標(biāo)準(zhǔn)實用11(0.461t126.1)0.00971.324105tP1.835kgm31.491kgm3因此 m 1.606kgm3查得過熱蒸汽粘度 μ=0.0160mPa.s雷諾數(shù)Re354Wd354540004.82106G2480.016取ε=0.2mm，則ε/d=0.2/248=0.000806查《HG-T20570.7管道壓力降計算》圖得，λ=0.0195摩擦壓力降P6.26103gLW2Gfd5m6.261039.810.019531.8554000224851.60673.84kPaP12=P11-△Pf=392.91-73.84=319.07kPa計算結(jié)果P12=319.07kPa，△Pf=73.84kPa4.計算結(jié)果物