鍋爐汽水阻力計(jì)算書-手算版

,,,汽水阻力計(jì)算書,,技術(shù)文件號(hào):,,

,,,,,共5頁(yè)第2頁(yè),,

序號(hào),名稱,符號(hào),單位,公式,數(shù)值,備注,

一,設(shè)計(jì)數(shù)據(jù),,,,,,

1,總給水量,G,kg/h,,10000,100000,

2,額定壓力,P,Mpa,表壓,3.82,3.82,

3,給水溫度,tgs,℃,,104,104,

4,進(jìn)口水密度,ρ,Kg/m3,1008.6263+(-0.2811*t)+(-0.0021921)t2,800.0,955.6821464,

5,負(fù)荷變量系數(shù),m,,,1.0,1,

6,實(shí)際給水量,Gs,kg/h,m*G,10000,100000,

,,,,,,,,

二,高溫過熱器阻力,,,,,,

7,高過出口集箱規(guī)格,DxS,mm,設(shè)計(jì)取定,273x16,273X16,

8,高過出口集箱內(nèi)徑,dn1,m,,0.241,0.241,

9,過熱蒸汽流量,Ggg,kg/h,,10000,100000,

10,出口蒸汽溫度,tck,℃,查熱力計(jì)算知,450,450,

11,進(jìn)口蒸汽溫度,tjk,℃,查熱力計(jì)算知,330.0,330,

12,平均蒸汽溫度,tpj,℃,,390.0,390,

13,出口蒸汽壓力,"P""",MPa,前面計(jì)算,3.82,3.82,

14,進(jìn)口蒸汽壓力,P',MPa,"先假定,后校核",3.96,3.96,

15,平均蒸汽壓力,Pcp,Mpa,"(P′+P"")/2",3.89,3.89,

16,平均蒸汽比容,Vcp,m3/kg,"查《水蒸汽性質(zhì)表》按3.99MPa,t=390℃",0.072,0.0722,

17,蒸汽平均密度,ρpj,kg/m3,1/Vcp,13.850,13.85041551,

18,管子橫向排數(shù),Z1,,幾何尺寸,100,100,

19,管圈數(shù),n,,,1.0,,

20,管子內(nèi)徑,dn,m,取用φ38x3.5,0.031,0.031,

21,管子流通截面積,fZ,m2,Z1*π*dn^2/4,0.075,0.0754385,

22,蒸汽平均流速,WS,m/s,Ggg/(ρpj*fz*3600),2.657,26.58530532,

23,集箱進(jìn)入管子的入口阻力系數(shù),ζjxr,,查標(biāo)準(zhǔn)表2-4,0.8,0.8,

24,管子的絕對(duì)粗糙度,k,mm,按2-21條選定,0.060,0.06,

25,折算摩擦阻力系數(shù),λ0,1/m,1/［4*dn(lg(3700*dn/k)^2］,0.749,0.748956763,

26,此路蒸汽流經(jīng)管長(zhǎng),L,m,查圖紙(取平均數(shù)),31.174,31.174,23.34797812

27,管子彎頭角度,,,查圖紙9個(gè)180°彎頭2個(gè)90°（取內(nèi)管圈）,,9個(gè)180°，2個(gè)90°,

28,彎頭阻力系數(shù)之和,ζwt,,按R/din=4.194(2.42)查表2-9、2-100.3+8x0.193x2+2x0.137x2,3.164,3.164,

29,管子進(jìn)入集箱的出口阻力系數(shù),ζjxc,,查標(biāo)準(zhǔn)表2-5,1.1,1.1,

30,過熱器的阻力系數(shù),ζgg,,ζjxr+ζwt+ζjxc+L*λ0,28.412,28.41197812,

31,過熱器流動(dòng)阻力,Pld3,MPa,ζgg*ωs^2*ρpj/2,0.001,0.14,

32,高溫過熱器進(jìn)口壓力,P',MPa,"p""+Pld3",3.821,3.96,

,,,,,,,,

三,噴水式減溫器阻力,,,,,,

33,噴水式減溫器阻力,Pld4,MPa,按《蒸汽鍋爐減溫器》第105頁(yè),0.05,0.05,蒸汽經(jīng)過減溫器的壓力損失小，一般為0.5公斤/cm2

34,低溫過熱器出口蒸汽壓力,"P""",MPa,,3.871,4.01,

,,,,,,,,

四,低溫過熱器阻力,,,,,,

35,低過出口集箱內(nèi)徑,dn1,m,取用φ273x16,0.241,0.241,

36,過熱蒸汽流量,Gdg,kg/h,,5000,95000,

37,出口蒸汽溫度,tck,℃,查熱力計(jì)算知,386.6,386.6,

38,進(jìn)口蒸汽溫度,tjk,℃,查熱力計(jì)算知,254.7,254.7,

39,平均蒸汽溫度,tpj,℃,(tck+tjk)/2,320.7,320.65,

40,出口蒸汽壓力,"P""",MPa,由上知,3.871,4.01,

41,進(jìn)口蒸汽壓力,P',MPa,"先假定,后校核",4.180,4.175,

42,平均蒸汽壓力,Pcp,Mpa,"(P′+P"")/2",4.026,4.092032459,

43,平均蒸汽比容,Vcp,m3/kg,"查《水蒸汽性質(zhì)表》按4.104MPa,t=320.7℃",0.0603,0.05891,

44,蒸汽平均密度,ρpj,kg/m3,1/Vcp,16.584,16.97504668,

45,管子橫向排數(shù),Z1,,設(shè)計(jì)取定,101,101,

46,管圈數(shù),n,,,1.0,,

47,管子內(nèi)徑,dn,m,取用φ38x3.5,0.031,0.031,

48,管子流通截面積,fZ,m2,Z1*π*dn^2/4,0.076,0.076192885,

49,蒸汽平均流速,WS,m/s,Gdg/(ρpj*fz*3600),1.099,20.4030789,

50,管子的絕對(duì)粗糙度,k,mm,按2-21條選定,0.060,0.06,

51,折算摩擦阻力系數(shù),λ0,,1/［4*dn(lg(3700*dn/k)^2］,0.749,0.748956763,

52,此路蒸汽流經(jīng)管長(zhǎng),L4,m,查圖紙（取平均值）,49.295,49.295,36.91982362

53,管子彎頭角度,,,查圖紙21個(gè)180°彎頭90°、60°彎頭各一個(gè),,21個(gè)180°，1個(gè)90°，一個(gè)60°,

54,彎頭的局部阻力系數(shù),ζwt,,按R/din=4.194(2.42)查表2-9、2-10與2-1110x0.3+11x0.193x2+0.137x2+0.112x2,7.744,7.744,

55,集箱進(jìn)入管子的入口阻力系數(shù),ζjxr,,查標(biāo)準(zhǔn)表2-4,0.8,0.8,

56,管子進(jìn)入集箱的出口阻力系數(shù),ζjxc,,查標(biāo)準(zhǔn)表2-5,1.1,1.1,

57,低溫過熱器的阻力系數(shù),ζdg,,ζjxr+ζwt+ζjxc+L4*λ0,46.564,46.56382362,

58,低溫過熱器流動(dòng)阻力,Pld5,MPa,ζdg*ωs^2*ρpj/2,0.00,0.164520884,

59,低過進(jìn)口蒸汽壓力,P',MPa,"p""+Plds",3.872,4.17,

,,,,,,,,

五,飽和蒸汽引出管阻力,,,,,,

60,低溫過熱器進(jìn)口集箱,DxS,mm,設(shè)計(jì)取定,219x16,219*16,

61,集箱內(nèi)徑,dn,m,設(shè)計(jì)取定,0.187,0.187,

62,引出管規(guī)格,dxS,mm,設(shè)計(jì)取定,133x6,133*6,

63,引出管長(zhǎng)度,L,m,設(shè)計(jì)取定,5.6,5.6,

64,飽和蒸汽溫度,t,℃,查熱力計(jì)算知,255,255,

65,出口蒸汽壓力,"P""",MPa,由上知,3.872,4.17,

66,進(jìn)口蒸汽壓力,P',MPa,"先假定,后校核",4.20,4.2,

67,平均蒸汽壓力,Pcp,Mpa,"(P′+P"")/2",4.036,4.186792901,

68,平均蒸汽比容,Vcp,m3/kg,"查《水蒸汽性質(zhì)表》按4.3MPa,t=255℃",0.0462,0.0464,

69,蒸汽平均密度,ρpj,kg/m3,1/Vcp,21.645,21.55172414,

70,管子根數(shù),n,,,6,6,

71,管子內(nèi)徑,dn,m,取用φ133x6,0.121,0.121,

72,管子流通截面積,fZ,m2,n*π*dn2/4,0.069,0.06895911,

73,蒸汽平均流速,WS,m/s,Gdg/ρpj*fz*3600,1.860,17.75609407,

74,管子的粗糙度,k,mm,按2-21條選定,0.06,0.06,

75,折算摩擦阻力系數(shù),λ0,,1/［4*dn(lg(3700*dn/k)^2］,0.138,0.137751539,0.771408619

76,連接管彎頭總局部阻力系數(shù),ζwt,,R/dn=400/121=3.3062個(gè)90°彎頭查表2-9與2-102x0.141=0.282,0.282,0.282,

77,連接管到鍋筒出口阻力系數(shù),ζc,,表2-5,1.0,1,

78,連接管入口阻力系數(shù),ζr,,表2-4,0.7,0.7,

79,連接管入口集箱阻力系數(shù),ζjx,,0.7n2(dn/djx)4=0.7x100x(99/187)4,4.417,4.417490212,主蒸汽引出管和過熱蒸汽引出管都有5中阻力系數(shù)

80,總阻力系數(shù),∑ζdg,,ζjx+ζwt+ζc+ζr+L*λ0,7.171,7.170898831,

81,阻力損失,△P,MPa,∑ζdg*Ws2*ρpj/2,0.000,0.024362424,

82,連接管進(jìn)口壓力,P',MPa,"p""+△P",3.872,4.20,

,,,,,,,,

六,鍋筒出口到高溫過熱器出口集箱的阻力損失,,,,,,

83,總阻力損失,△P,MPa,p′-p″,0.052,0.38,

,,,,,,,,

七,省煤器引出管及鍋筒進(jìn)水管阻力,,,,,,

84,水流量,Gs2,kg/h,額定給水量+1%的排污量-5%的噴水量,10000,96000,

85,省煤器出口集箱規(guī)格,dxs,mm,設(shè)計(jì)取定,219x16,219*16,

86,進(jìn)水管規(guī)格,dxs,mm,設(shè)計(jì)取定,89x4.5,89*4.5,

87,進(jìn)水管內(nèi)徑,dn,m,設(shè)計(jì)取定,0.050,0.08,

88,進(jìn)水管數(shù)量,n,根,設(shè)計(jì)取定,1,4,

89,進(jìn)水管計(jì)算長(zhǎng)度,L,m,設(shè)計(jì)取定,700.0,19,

90,介質(zhì)溫度,t',℃,查熱力計(jì)算知,40.0,244.8,

91,介質(zhì)出口水壓力,P',MPa,前面計(jì)算,1.000,4.20,

92,介質(zhì)進(jìn)口水壓力,"P""",MPa,"先假定,后校核",2.000,4.22,

93,平均介質(zhì)壓力,Pcp,Mpa,"(P′+P"")/2",1.500,4.208974113,

94,平均介質(zhì)比容,Vcp,m3/kg,"查《水蒸汽性質(zhì)表》按4.311MPa,t=244.8℃",0.00125,0.00124,

95,管子的絕對(duì)粗糙度,k,mm,按2-21條選定,0.060,0.06,

96,進(jìn)水管摩擦阻力系數(shù),λy,1/m,查線算圖2-8,0.23,0.23,

97,進(jìn)水管介質(zhì)流通面積,fy,m2,n*π*dn^2/4,0.002,0.020096,

98,排污量,Dpw,kg/h,熱力計(jì)算1%D,0,1000,

99,鍋爐進(jìn)水管介質(zhì)流速,Wy,m/s,(D+Dpw)xVcp/(3600xfy),1.768,1.662575195,

100,進(jìn)水管進(jìn)口局部阻力系數(shù),ζyr,,表2-4,0.7,0.7,

101,進(jìn)水管彎頭局部阻力系數(shù),ζwt,,R/dn=300/80=3.754個(gè)90°彎頭按表2-114x0.2=0.8,0.800,0.8,

102,進(jìn)水管出口局部阻力系數(shù),ζjc,,表2-5,1.0,1,

103,進(jìn)水管總阻力系數(shù),∑ζ1,,ζjc+ζwt+ζyr+L*λy,163.500,6.87,

104,進(jìn)水管阻力損失,△P1,MPa,∑ζ1*Wy2/(2*Vcp),0.205,0.007657159,

105,總損失,△P,MPa,△P1+△P2,0.205,0.007657159,

106,省煤器引出管進(jìn)口壓力,"P""",MPa,P'+△P,1.205,4.21,

,,,,,,,,

八,省煤器阻力,,,,,,

107,省煤器集箱規(guī)格,DxS,mm,設(shè)計(jì)取定,219x16,219*16,

108,蛇形管規(guī)格,dxs,mm,設(shè)計(jì)取定,32x3,32*3,

109,蛇形管內(nèi)徑,dn,m,設(shè)計(jì)取定,0.026,0.026,

110,蛇形管根數(shù),n,,設(shè)計(jì)取定,1,74,

111,介質(zhì)流通截面積,fn,m2,nxπdn2/4,0.0005,0.03926884,

112,進(jìn)口介質(zhì)溫度,t',℃,查熱力計(jì)算知,40.0,104,

113,出口介質(zhì)溫度,"t""",℃,查熱力計(jì)算知,40.0,244.8,

114,平均介質(zhì)溫度,tcp,℃,"(t'+t"")/2",40.0,174.4,

115,管子的絕對(duì)粗糙度,k,mm,按2-21條選定,0.060,0.06,

116,折算摩擦阻力系數(shù),λ0,,1/［4*dn(lg(3700*dn/k)^2］,1.036,0.93606097,

117,蛇形管長(zhǎng)度,L,m,結(jié)構(gòu)特性,600.0,169,

118,介質(zhì)出口水壓力,P',MPa,前面計(jì)算,1.205,4.21,

119,介質(zhì)進(jìn)口水壓力,"P""",MPa,"先假定,后校核",4.300,4.3,

120,平均介質(zhì)壓力,Pcp,Mpa,"(P′+P"")/2",2.752,4.252802692,

121,平均介質(zhì)比容,Vcp,m3/kg,"查《水蒸汽性質(zhì)表》按4.355MPa,t=174.4℃",0.00112,0.00112,

122,排污量,Dpw,kg/h,熱力計(jì)算1%D,100,1000,

123,介質(zhì)流速,Ws,m/s,(D+Dpw)xVcp/(3600xfn),5.860,0.768491704,

124,蛇形管進(jìn)口阻力系數(shù),ζr,,表2-4,0.80,0.8,

125,中間集箱蛇形管進(jìn)口阻力系數(shù),ζz,,表2-4、2-5ζr+ζc,3.6,3.6,

126,蛇形管彎頭阻力系數(shù),ζwt,,"R/dn=60/26=2.308表2-9表2-104個(gè)90°彎頭,2個(gè)60°彎頭,29個(gè)180°彎頭4x0.141x2+2x0.114x2+29x0.198x2",13.068,13.068,

127,省煤器總阻力系數(shù),∑ζ,,ζwt+ζc+ζr+ζz+L*λ0,639.324,175.6623039,

128,省煤器總阻力損失,△P,MPa,∑ζ*Ws2/(2*Vcp),9.8001,0.046313641,

129,省煤器進(jìn)口集箱壓力,Pv,MPa,P'+△P,11.005,4.25,

,,,,,,,,

九,重位壓差（鍋筒至省煤器