汽轮机表面式凝汽器抽气设备

1、JB/T 10085 ××××CC附录C（资料性附录）抽气设备C.1抽气设备能力的确定凝汽器中需要抽出的不凝结气体的来源包括但不仅限于以下几项：低于大气压下运行的系统部件中漏进的空气；进入凝汽器的疏水和排汽释放的气体；进入凝汽器的补给水释放的气体；循环冷却中所使用的凝结水平衡箱内所产生的气体；在某些形式的核燃料的循环中，从给水中解析出来的氧气、氢气及其他不凝结气体。除不凝结气体外，还应抽出一定量的附带蒸汽，以确保凝汽器的正常性能，并产生合理的气流速度，使凝汽器汽侧的腐蚀减少到最小程度。C.2设计吸入压力抽气设备的吸入压力应符合下列要求：电站汽轮机凝汽器的

2、设计吸入压力为3.386 kPa （a）或凝汽器设计压力，取二者中的较小值。最终选择还应考虑到在整个预期的运行压力内的凝汽器与其抽气设备的协调运行。此外，当选择设计吸入压力时，还应考虑抽气设备的实际位置。工业和船用汽轮机或泵等其他机械动力设备用凝汽器的设计吸入压力为凝汽器设计压力减去3.386 kPa或为运行所要求的最低压力，取二者中的较小值，但不得低于3.386 kPa （ a）。C.3设计吸入温度设计吸入温度 （即抽吸的汽- 气混合物温度） ，应为抽气设备设计压力相对应的饱和蒸汽温度t vs（）减去 0.25( t s- t w1) 或 4.16中的较大值（t s为蒸汽凝结温度，t w1为

3、冷却水进口温度）。运行中抽气口的蒸汽实际温度受到运行特性、不凝结气体负荷和抽气设备容量特性的影响，不一定等于设计吸入温度。C.4水蒸汽量的计算混合气体中饱和水蒸汽量与不凝结气体的比值按公式（C.1 ）计算：W18Pww.(C.1)WMPPggVSw式中：Ww混合气体中的饱和水蒸汽质量，单位为千克（kg）；Wg混合气体中的不凝结气体质量，单位为千克（kg）；Pw与凝汽器抽气口处温度相对应的水蒸汽的饱和压力，单位为千帕kPa （ a） ；Mg不凝结气体的平均分子量。不凝结气体为干空气时其分子量为29；55JB/T 10085 ××××PVS凝汽器抽气口处总的

4、绝对压力，单位为千帕kPa （ a） 。C.5推荐的最小容量建议抽气器的容量大于或等于表 C.1 、表C.2 和表 C.3 中各设计压力对应的数值。 在应用各表查值时应结合以下各条说明：a) 总排汽量由主汽轮机进凝汽器的排汽量和辅助汽轮机进入凝汽器的排汽量组成；b) 主排汽口数为与凝汽器壳体连接的主汽轮机排汽口，但不包括辅助汽轮机的排汽口；c) 每个主排汽口有效的蒸汽流量为a）表示的总排汽量除以 b）的排汽口数量所得的结果；d) 凝汽器壳体的总排汽口数是将主排汽口数加上进入凝汽器的辅助汽轮机排汽口数；e) 如果多壳体凝汽器的每一个壳体均采用独立抽气系统，则每个系统的能力是由表格中查得的总容量除

5、以独立抽气系统的数目来确定，亦可选择一个容量较大的单一抽气系统，即串联抽气系统。确定抽气设备系统和容量时，应考虑下述情况：单压多壳体凝汽器应分别对每个壳体配置独立抽气系统；多压单壳体凝汽器的抽气容量对于每一压力区可选择独立抽气系统，也可选择一个容量较大的单一抽气系统，并确定相应的容量；多压多壳体凝汽器的抽气容量应符合，应分别对每个壳体配置独立抽气系统；使用射汽抽气器时，进入其冷却器的凝结水（作为冷却水用）的温度按凝汽器可能出现的最高压力下的蒸汽饱和温度计算；核电机组在按表C.1 、表 C.2、表 C.3 查得抽气容量时，还应考虑循环中排入凝汽器的附加的非凝结气体；有旁路蒸汽全负荷排放时，循环水

6、泵全部或部分投入，抽气器应能抽出比凝汽器最高压力所对应的饱和温度低4.16时的非凝结气体量。56每个主排汽口有效的蒸汽流量kg/h011 340项目抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/haJB/T 10085 ××××表 C.1抽气设备容量（单壳体凝汽器）总排汽口数1234567890.0850.1130.1420.1420.2120.2120.2120.2830.2836.128.1610.2110.2115.3315.3315.3320.4120.4113.4717.9622.4522.4533.7533.7533.7544.914

7、4.9111 34022 680汽、气混合物量kg/h抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量19.6026.1332.6632.6649.0849.0849.0865.3265.320.1130.1420.2120.2120.2830.2830.2830.3540.3548.1610.2115.3315.3320.4120.4120.4125.4925.4917.9622.4533.7533.7544.9144.9144.9156.0656.0626.1332.6649.0849.0865.3265.3265.3281.5681.5622 68045 360k

8、g/h抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/ha0.1420.2120.2830.2830.3540.3540.4250.4250.42510.2115.3320.4120.4125.4925.4930.6230.6230.6222.4533.7544.9144.9156.0656.0667.3667.3667.36汽、气混合物量kg/h32.6649.0865.3265.3281.5681.5697.9897.9897.9857每个主排汽口有效的蒸汽流量kg/h45 360113 400项目抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/haJB/T 10085 

9、15;×××表 C.1抽气设备容量（单壳体凝汽器） （续）总排汽口数1234567890.2120.3540.3540.4250.4960.5660.5660.7080.70815.3325.4925.4930.6235.740.8240.8251.0351.0333.7556.0656.0667.3678.5289.8189.81112.26112.26113 400226 800226 800453 600汽、气混合物量kg/h抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量kg/h抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg

10、/h汽、气混合物量kg/h49.0881.5681.5697.98114.21130.63130.63163.29163.290.2830.4250.4960.5660.7080.7080.850.850.99120.4130.6235.740.8251.0351.0361.2361.2371.4444.9167.3678.5289.81112.26112.26134.72134.72157.1765.3297.98114.21130.63163.29163.29195.95195.95228.610.3540.5660.5660.7080.850.850.9911.1331.13325.49

11、40.8240.8251.0361.2361.2371.4481.6581.6556.0689.8189.81112.26134.72134.72157.17179.62179.6281.56130.63130.63163.29195.95195.95228.61261.27261.2758JB/T 10085 ××××表 C.1抽气设备容量（单壳体凝汽器）（续）每个主排汽口有效的蒸汽流量kg/h453 600907 200项目抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/ha总排汽口数1234567890.4250.7080.7080.850.

12、9911.1331.1331.2741.41630.6251.0351.0361.2371.4481.6581.6591.85102.0667.36112.26112.26134.72157.17179.62179.62202.08224.53907 2001 360 8001 360 8001 814 400汽、气混合物量kg/h抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量kg/h抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量kg/h97.98163.29163.29195.95228.61261.27261.27293.93326.59

13、0.4960.7080.850.9911.1331.2741.4161.5571.69935.751.0361.2371.4481.6591.85102.06112.26122.4778.52112.26134.72157.17179.62202.08224.53246.98269.43114.21163.29195.95228.61261.27293.93326.59359.25391.900.5660.850.9911.1331.2741.4161.5571.6991.84140.8261.2371.4481.6591.85102.06112.26122.47132.6889.81134.

14、72157.17179.62202.08224.53246.98269.43291.89130.63195.95228.61261.27293.93326.59359.25391.90424.56注：表中数据只考虑空气泄漏，汽、气混合物量是在吸入压力为3.386 kPa （a），温度为 22 条件下确定的。a表中抽吸干空气量是指在压力为0.1013 MPa （ a），温度为21 情况下的干空气量。59每个主排汽口有效的蒸汽流量kg/h45 360113 400项目抽吸干空气量a3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量JB/T 10085 ×××&

15、#215;表 C.2抽气设备容量（双壳体凝汽器）总排汽口数2345678910111213140.4250.5660.5660.5660.7080.7080.850.850.9910.9911.1331.1331.13330.6240.8240.8240.8251.0351.0361.2361.2371.4471.4481.6581.6581.6567.3689.8189.81112.26112.26134.72134.72157.17157.17179.62179.62179.62179.6297.98130.63130.63130.63163.29163.29195.95195.95228

16、.61228.61261.27261.27261.27113 400226 800kg/h抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/ha0.5660.5660.7080.850.850.9911.1331.1331.4161.4161.4161.6991.69940.8240.8251.0361.2361.2371.4481.6581.65102.06102.06102.06122.47122.4789.8189.81112.26134.72134.72157.17179.62179.62224.53224.53224.53269.43269.43汽、气混合物量226 800453

17、 600kg/h抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/ha130.63130.63163.29195.95195.95228.61261.27261.27326.59326.59326.59391.90391.900.7080.7080.850.9911.1331.4161.4161.4161.6991.6991.9821.9821.98251.0351.0361.2371.4481.65102.06102.06102.06122.47122.47142.88142.88142.88112.26112.26134.72157.17179.62224.53224.53224.53

18、269.43269.43314.34314.34314.34汽、气混合物量kg/h163.29163.29195.95228.61261.27326.59326.59326.59391.90391.90457.22457.22457.2260JB/T 10085 ××××表 C.2抽气设备容量（双壳体凝汽器）（续）每个主排汽口有效的蒸汽流量总排汽口数kg/h项目234567891011121314抽吸干空气量a0.9911.1331.1331.4161.4161.6991.6991.9821.9822.2652.2652.54930.85m/min干空气

19、量61.2371.4481.6581.65102.06102.06122.47122.47142.88142.88163.29163.29183.70kg/h453 600907 200水蒸汽量134.72157.17179.62179.62224.53224.53269.43269.43314.34314.34359.25359.25404.15kg/h汽、气混合物量195.95228.61261.27261.27326.59326.59391.90391.90457.22457.22522.54522.54587.86kg/h抽吸干空气量 a1.1331.1331.4161.6991.69

20、91.9821.9822.2652.2652.5492.8322.83230.991m/min干空气量71.4481.6581.65102.06122.47122.47142.88142.88163.29163.29183.70204.12204.12kg/h907 2001 360 800水蒸汽量157.17179.62179.62224.53269.43269.43314.34314.34359.25359.25404.15449.06449.06kg/h汽、气混合物量228.61261.27261.27326.59391.90391.90457.22457.22522.54522.545

21、87.86653.17653.17kg/h抽吸干空气量 a1.4161.4161.6991.9821.9822.2652.2652.5492.8322.8323.1153.39831.133m/min干空气量81.65102.06102.06122.47142.88142.88163.29163.29183.70204.12204.12224.53244.94kg/h1 360 8001 814 400水蒸汽量179.62224.53224.53269.43314.34314.34359.25359.25404.15449.06449.06493.96538.87kg/h汽、气混合物量261.

22、27326.59326.59391.90457.22457.22522.54522.54587.86653.17653.17718.49783.81kg/h注：表中数据只考虑空气泄漏，汽、气混合物量是在吸入压力为3.386 kPa （a），温度为 22 条件下确定的。a表中抽吸干空气量是指在压力为0.1013 MPa （ a），温度为 21 情况下的干空气量。61每个主排汽口有效的蒸汽流量kg/h113 400226 800项目抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/haJB/T 10085 ××××表 C.3抽气设备容量（三壳体凝汽器）总

23、排汽口数345678910111213140.850.851.0621.0621.0621.2741.4871.4871.6991.6992.1242.12461.2361.2376.5676.5676.5691.85107.18107.18122.47122.47153.09153.09134.72134.72168.46168.46168.46202.08235.82235.82269.43269.43336.79336.79226 800453 600汽、气混合物量kg/ha抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/h汽、气混合物量195.95195.95245.03245.

24、03245.03293.93343.01343.01391.90391.90489.88489.880.851.0621.2741.2741.4871.4871.6992.1242.1242.1242.5492.54961.2376.5691.8591.85107.18107.18122.47153.09153.09153.09183.70183.70134.72168.46202.08202.08235.82235.82269.43336.79336.79336.79404.15404.15195.95245.03293.93293.93343.01343.01391.90489.88489

25、.88489.88587.86587.86453 600907 200kg/h抽吸干空气量3m/min干空气量kg/h水蒸汽量kg/ha1.0621.2741.4871.4871.6992.1242.1242.1242.5492.5492.9732.97376.5691.85107.18107.18122.47153.09153.09153.09183.70183.70214.33214.33168.46202.08235.82235.82269.43336.79336.79336.79404.15404.15471.51471.51汽、气混合物量kg/h245.03293.93343.013

26、43.01391.90489.88489.88489.88587.86587.86685.84685.8462每个主排汽口有效的蒸汽流量kg/hJB/T 10085 ××××表 C.3抽气设备容量（三壳体凝汽器）（续）总排汽口数项目907 2001 360 8001 360 8001 814 400抽吸干空气量m3/min干空气量kg/h水蒸汽量kg/h汽、气混合物量kg/h抽吸干空气量m3/min干空气量kg/h水蒸汽量kg/h汽、气混合物量kg/h34567891011121314a1.2741.4871.6992.1242.1242.1242.54

27、92.5492.9732.9733.3983.39891.85107.18122.47153.09153.09153.09183.70183.70214.33214.33244.94244.94202.08235.82269.43336.79336.79336.79404.15404.15471.51471.51538.87538.87293.93343.01391.90489.88489.88489.88587.86587.86685.84685.84783.81783.81a1.4871.6992.1242.1242.5492.5492.9732.9733.3983.3983.8233.823107.18122.47153.091