CN203249228U - 一种利用汽轮机抽汽的空气预热系统 - Google Patents
一种利用汽轮机抽汽的空气预热系统 Download PDFInfo
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- CN203249228U CN203249228U CN 201320261844 CN201320261844U CN203249228U CN 203249228 U CN203249228 U CN 203249228U CN 201320261844 CN201320261844 CN 201320261844 CN 201320261844 U CN201320261844 U CN 201320261844U CN 203249228 U CN203249228 U CN 203249228U
- Authority
- CN
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- Prior art keywords
- air
- links
- heaters
- steam
- steam turbine
- Prior art date
Links
- 239000003570 air Substances 0.000 title claims abstract description 281
- 238000010438 heat treatment Methods 0.000 title claims abstract description 18
- 239000011901 water Substances 0.000 claims abstract description 26
- 238000010248 power generation Methods 0.000 claims abstract description 16
- 239000007789 gases Substances 0.000 claims description 81
- 230000002209 hydrophobic Effects 0.000 claims description 70
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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Abstract
本实用新型涉及一种利用汽轮机抽汽的空气预热系统。该系统中，一次风预热子系统、二次风预热子系统与火力发电机组的锅炉系统、汽轮机系统进行耦合，构建新型的锅炉给水预热系统。一次风经由四级空气加热器与一级疏水冷却器被加热至一次风额定温度；二次风经由五级空气加热器被加热至二次风额定温度。本实用新型提出的空气预热系统有效避免了漏风问题，同时减少了一次风机、送风机与引风机的运行电耗，提高了燃煤电站的发电效率，此外可以通过调节进入各级空气加热器的抽汽流量及疏水旁路阀门开度来灵活调节一、二次风温度。
Description
ー种利用汽轮机抽汽的空气预热系统
技术领域
[0001] 本实用新型涉及火力发电机组的空气预热系统，特别涉及ー种利用汽轮机抽汽的空气预热系统。
背景技术
[0002] 有限的化石燃料资源与日益上涨的燃料价格驱动着火カ发电机组不断的技术革新与进步，当前火力发电机组正在朝着高參数大型化的方向发展，尽管节能工作已经取得了长足的进步，但对于火力发电机组的效率仍需通过改进设备与优化系统设计来进ー步提闻。
[0003] 空气预热作为ー种提高火力发电机组效率的手段已经在火力发电行业得到了广泛的应用，传统的空气预热方式是利用锅炉尾部烟道内的温度较高的烟气来加热用于输送煤粉的冷一次风与用于助燃的冷二次风，采用空气预热系统不但可以回收排烟热损失从而提高了锅炉的热效率，同时温度较高的空气可以加速燃料的干燥和着火，对于燃料的点火和稳燃都有益处，此外热风温度的提高使得锅炉炉内温度升高，強化了炉内的辐射换热。目前300MW以上的火力发电机组普遍采用以回转式空气预热器为代表的空气预热系统，回转式空气预热器具有结构紧凑，重量较轻，金属耗量低等优点而使得火力发电机组的经济性得到提高，但回转式空气预热器也存在漏风问题，漏风的存在不但増大了一次风量与烟气量从而加大了一次风机与送风机的耗电量，同时空气的混入也使得烟气温度下降，引起不可逆□损失。此外烟气温度的降低也使得尾部受热面的换热温差下降，不利于换热导致排烟温度提高，増大了排烟损失。针对回转式空预器本体的密封改进设计已经取得了良好的效果，但回转式空预器的结构特点决定了其漏风问题不能完全得到解決。针对空气预热系统的优化设计已经开展了许多的研究，以下专利分别从不同角度提出了空气预热系统的设计方案，并具有各自的优缺点:
[0004] 专利US3835650A提出了一种用于蒸汽锅炉的空气预热系统的布置方式，其系统结构布置特点为:用于驱动给水泵的小汽轮机的排汽并未全部进入凝汽器，而是设置一外加旁路，在主空气预热器前设置ー暖风器，从旁路引出一部分小汽轮机的排汽在暖风器内预热进入主空气预热器的冷空气，其优点为増加了机组的回热程度，提高了机组的总效率，提高了主空气预热器的入口冷空气温度从而減少了尾部受热面的低温腐蚀。然而当主空气预热器采用回转式空气预热器时，系统仍存在漏风问题，同时采用上述暖风器时会导致排烟温度的升高，导致锅炉效率有所下降。
[0005] 专利CN102705861A提出了ー种燃煤エ业锅炉空气预热器系统，其系统结构布置特点为:将空气预热器系统划分为烟气侧空气预热器和空气侧空气预热器，在其间布置热媒水箱，利用水作为媒介在烟气侧吸收热量，后在空气侧放出热量预热空气，有效避免了漏风问题，同时可以控制锅炉尾部受热面的低温腐蚀问题，但以水作为媒介对空气进行预热増加了一次中间换热过程，増大了换热面积，同时需要采用循环水泵来驱动，使得节能效果有所削弱。[0006] 专利CN102767822A提出了一种空气分级预热与汽轮机凝结水的集成系统，布置有常规回转式空气预热器、前置式低温空气预热器两级空气预热器，同时与给水回热系统进行整合，注重了能量的梯级利用，使得机组效率得到提高，而上述系统仍采用常规的回转式空气预热器，并未解決空气预热器的漏风问题。
[0007] 专利CN1033865A提出了 一种用エ业锅炉用凝结水和蒸汽加热空气方法及其预热器，其系统结构布置特点为:エ业锅炉产生的蒸汽与用汽设备均进入空气预热器内预热空气，使空气温度达到150°C左右，其目的在于克服预热器的烟气磨损、堵塞以及腐蚀问题，使得热效率得到提高，并具有体积小、结构简单、造价低等优点。但其只是针对エ业锅炉设计，利用新蒸汽及用汽设备回水加热空气达150摄氏度左右，不能满足火力发电机组空气的空气预热需求，同时其供汽来源为锅炉新蒸汽与用汽设备回水，并不适用于火力发电机组的空气预热情況。
发明内容
[0008] 本实用新型针对回转式空气预热器的漏风缺陷，从系统层面提供一种全新的利用汽轮机抽汽加热空气的空气预热系统，克服空气预热器的漏风缺陷，同时兼顾系统集成时能量的合理梯级利用，并减少运行辅机电耗。
[0009] 本实用新型所述预热系统采用的技术方案为:
[0010] 该系统由一次风预热子系统与二次风预热子系统构成，一次风预热子系统、二次风预热子系统与火力发电机组的锅炉系统、汽轮机系统进行耦合，构建新型的锅炉给水预热系统；其中，火力发电机组的锅炉系统与汽轮机系统连接方式为:锅炉的主蒸汽管道与汽轮机高压缸相连，再热蒸汽管道与汽轮机中压缸、汽轮机低压缸依次次串联；
[0011] 所述一次风预热子系统的连接方式为:一次风机的出口与一号空气加热器的空气入口相连，一号空气加热器、二号空气加热器、疏水冷却器、三号空气加热器的空气侧通过管路依次串联，三号空气加热器的空气出口与热一次风管道相连；汽轮机八段抽汽与一号空气加热器蒸汽入口相连，汽轮机七段抽汽与二号空气加热器蒸汽入口相连，汽轮机一段抽汽与三号空气加热器的蒸汽入口相连；三号空气加热器的疏水出ロ与一号高压加热器的疏水入口相连，二号空气加热器的疏水出口与一号空气加热器的疏水入口相连，一号空气加热器的疏水出口与凝汽器相连，疏水旁路阀门与疏水冷却器并联；
[0012] 所述二次风预热子系统的连接方式为:送风机的出口与四号空气加热器的空气入ロ相连，四号空气加热器、五号空气加热器、六号空气加热器、七号空气加热器、八号空气加热器的空气侧通过管路依次串联，八号空气加热器的空气出口与热二次风管道相连；汽轮机八段抽汽与四号空气加热器的蒸汽入口相连，汽轮机七段抽汽与五号空气加热器的蒸汽入口相连，汽轮机六段抽汽与六号空气加热器的蒸汽入口相连，汽轮机五段抽汽与七号空气加热器的蒸汽入口相连，汽轮机一段抽汽与八号空气加热器的蒸汽入口相连；八号空气加热器的疏水出口经三通阀分别干与疏水冷却器和疏水旁路阀门相连，七号空气加热器的疏水出口与六号空气加热器的疏水入口相连，六号空气加热器的疏水出口与五号空气加热器的疏水入口相连，五号空气加热器的疏水出口与四号空气加热器的疏水入口相连，四号空气加热器的疏水出口与凝汽器相连；
[0013] 所述锅炉给水预热系统的连接方式为:凝结水泵的出口与五号低压加热器的水侧入口相连，低压加热器、低温省煤器、四号低压加热器、除氧器、给水泵、二号高压加热器、一号高压加热器以及高温省煤器的水侧通过管路依次串联，高温省煤器的水侧出口与锅炉水冷壁相连；汽轮机ニ段抽汽与一号高压加热器的蒸汽侧入口相连，汽轮机三段抽汽与ニ号高压加热器的蒸汽侧入口相连，汽轮机四段抽汽与除氧器蒸汽侧入口相连；汽轮机五段抽汽与四号低压加热器的蒸汽入口相连，汽轮机八段抽汽与五号低压加热器的蒸汽入口相连；一号高压加热器的疏水出ロ与二号高压加热器的疏水入口相连，二号高压加热器的疏水出口与除氧器的疏水入口相连，四号低压加热器的疏水出口与五号低压加热器的疏水入ロ相连，五号低压加热器的疏水出口与凝汽器相连。
[0014] 所述热一次风管道与热二次风管道送入的热风的温度为200°C -360°C。
[0015] 所述汽轮机一段抽汽温度范围为400°C _420°C，汽轮机ニ段抽汽的温度范围为2200C _240°C，汽轮机三段抽汽的温度范围为470°C _490°C，汽轮机四段抽汽的温度范围为3700C _390°C，汽轮机五段抽汽的温度范围为290°C _310°C，汽轮机六段抽汽的温度范围为2200C _240°C，汽轮机七段抽汽的温度范围为140°C _160°C，汽轮机八段抽汽的温度范围为800C -1OO0C0
[0016] 本实用新型的有益效果为:
[0017] 本实用新型提出的空气预热系统有效避免了漏风问题，并依据參数匹配与能量梯级利用的原则与火力发电系统中其他子系统进行合理耦合，減少了一次风机、送风机与引风机的运行电耗，提高了燃煤电站的发电效率，降低了发电煤耗；在运行层面，可以通过调节进入各级空气加热器的抽汽流量及疏水旁路阀门开度来灵活调节一、二次风温度。具体而言，采用本实用新型所提出空气预热系统的1000MW火力发电机组，与同參数采用三分仓回转式空气预热器系统的1000MW常规火力发电机组相比较，漏风问题得到有效解决，风机总电耗降低约5MW，全厂供电效率提高约0.6%，折合节约标准煤约4g/kWh。
附图说明
[0018] 图1是本实用新型的整体系统结构示意图。
[0019] 图中标号:
[0020] 1-锅炉；2_再热蒸汽管道；3_主蒸汽管道；4_汽轮机高压缸；5_汽轮机中压缸；6_汽轮机低压缸；7_发电机；8_凝汽器；9_凝结水泵；10_—次风机；11_送风机；12_—号空气加热器；13_ 二号空气加热器；14_三号空气加热器；15_四号空气加热器；16_五号空气加热器；17_六号空气加热器；18_七号空气加热器；19_八号空气加热器；20_热二次风管道；21_热一次风管道；22_引风机；23_低温省煤器；24_高温省煤器；25_锅炉水冷壁；26-省煤器入口烟气；27_—号高压加热器；28_二号高压加热器；29_除氧器；30_循环冷却水；31_给水泵；32_四号低压加热器；33_五号低压加热器；34_疏水冷却器；35_汽轮机一段抽汽；36_汽轮机ニ段抽汽；37_汽轮机三段抽汽；38_汽轮机四段抽汽；39_汽轮机五段抽汽；40_汽轮机六段抽汽；41_汽轮机七段抽汽；42_汽轮机八段抽汽；43_冷一次风管道；44-冷二次风管道；45_排烟；46_空气加热器疏水管道；47_疏水旁路阀门。
具体实施方式
[0021] 本实用新型提供了ー种利用汽轮机抽汽加热空气的空气预热系统，下面结合附图和具体实施方式对本实用新型做进ー步说明。
[0022] 以某1000MW大型燃煤发电机组的模拟应用为例，其连接方式见图1。该系统使用本实用新型提出的利用汽轮机抽汽的空气预热系统取代了原机组尾部烟道的三分仓回转式空气预热器，并与原机组的回热系统进行耦合集成。
[0023] 锅炉I的主蒸汽管道3与汽轮机的高压缸4相连，再热蒸汽管道2与汽轮机中压缸5、汽轮机低压缸6 —次串联，汽轮机的输出端连接发电机7。
[0024] 一次风预热子系统的连接方式为:一次风机10的出口与一号空气加热器12的空气入口相连，一号空气加热器12、二号空气加热器13、疏水冷却器34、三号空气加热器14的空气侧通过管路依次串联，三号空气加热器14的空气出口与热一次风管道21相连；汽轮机八段抽汽42与一号空气加热器12蒸汽入口相连，汽轮机七段抽汽41与二号空气加热器13蒸汽入口相连，汽轮机一段抽汽35与三号空气加热器14的蒸汽入口相连；三号空气加热器
14的疏水出口与一号高压加热器27的疏水入口相连，二号空气加热器13的疏水出口与一号空气加热器12的疏水入口相连，一号空气加热器12的疏水出口与凝汽器8相连，疏水旁路阀门47与疏水冷却器34并联。
[0025] 二次风预热子系统的连接方式为:送风机11的出口与四号空气加热器15的空气入口相连，四号空气加热器15、五号空气加热器16、六号空气加热器17、七号空气加热器18、八号空气加热器19的空气侧通过管路依次串联，八号空气加热器19的空气出口与热ニ次风管道20相连；汽轮机八段抽汽42与四号空气加热器15的蒸汽入口相连，汽轮机七段抽汽41与五号空气加热器16的蒸汽入口相连,汽轮机六段抽汽40与六号空气加热器17的蒸汽入口相连，汽轮机五段抽汽39与七号空气加热器18的蒸汽入口相连，汽轮机一段抽汽35与八号空气加热器19的蒸汽入口相连；八号空气加热器19的疏水出口经三通阀分别于与疏水冷却器34和疏水旁路阀门47相连，七号空气加热器18的疏水出口与六号空气加热器17的疏水入口相连，六号空气加热器17的疏水出口与五号空气加热器16的疏水入口相连，五号空气加热器16的疏水出口与四号空气加热器15的疏水入口相连，四号空气加热器15的疏水出口与凝汽器8相连。
[0026] 锅炉给水预热系统的连接方式为:凝结水泵9的出口与五号低压加热器33的水侧入口相连，低压加热器33、低温省煤器23、四号低压加热器32、除氧器29、给水泵31、二号高压加热器28、一号高压加热器27以及高温省煤器24的水侧通过管路依次串联，高温省煤器24的水侧出口与锅炉水冷壁25相连；汽轮机ニ段抽汽36与一号高压加热器27的蒸汽侧入口相连，汽轮机三段抽汽37与二号高压加热器28的蒸汽侧入口相连，汽轮机四段抽汽38与除氧器29蒸汽侧入口相连；汽轮机五段抽汽39与四号低压加热器32的蒸汽入口相连，汽轮机八段抽汽42与五号低压加热器33的蒸汽入口相连；一号高压加热器27的疏水出口与二号高压加热器28的疏水入口相连，二号高压加热器28的疏水出口与除氧器29的疏水入口相连，四号低压加热器32的疏水出ロ与五号低压加热器33的疏水入ロ相连，五号低压加热器33的疏水出口与凝汽器8相连。
[0027] 省煤器入口烟气26依次通过高温省煤器24、低温省煤器23、引风机22，成为排烟45排出。
[0028] 利用汽轮机抽汽的空气预热系统与回热系统的水侧耦合方式为:汽轮机凝结水经凝结水泵加压后依次进入五号低压加热器33、低温省煤器23、四号低压加热器32、除氧器29、给水泵31、二号高压加热器28、一号高压加热器27、高温省煤器24后送加热至额定温度送入锅炉下联箱。
[0029] 一次风热风系统的疏水流程为:三号空气加热器14的疏水流至一号高压加热器27，二号空气加热器13的疏水流至一号空气加热器12，一号空气加热器12的疏水流至凝汽器8。循环冷却水30通入凝汽器8參与换热循环。
[0030] 二次风热风系统的疏水流程为:八号空气加热器19的疏水进入空气加热器疏水管道管道46后经三通阀分为两股，一股进入疏水冷却器34加热一次风，后进入一号高压加热器27，另ー股经疏水旁路阀门47调节进入一号高压加热器27，七号空气加热器18的疏水流至六号空气加热器17，六号空气加热器17的疏水流至五号空气加热器16，五号空气加热器16的疏水流至四号空气加热器15，四号空气加热器15的疏水进入凝汽器8。本例中各段抽汽參数如下:
[0031]
[0032] 本例中，空气预热系统的工作流程为:一次风的加热流程为:冷风一冷一次风管道43 ——次风机10 ——号空气加热器12 — 二号空气加热器13 —疏水冷却器34 —三号空气加热器14 —热一次风管道21 ；
[0033] 二次风的加热流程为:冷风一冷二次风管道44 — 二次风机11 —四号空气加热器
15 —五号空气加热器16 —六号空气加热器17 —七号空气加热器18 —八号空气加热器19 —热二次风20 ；
[0034] 本实例中空气预热系统各空气加热器的主要參数为:
[0035]
[0036] 该实施例并不构成对本实用新型的限制，若通过更改抽汽參数或者其他等同替换或等效变换所获得的技术方案，均落在本实用新型的保护范围之内。
Claims (3)
1.ー种利用汽轮机抽汽的空气预热系统，其特征在干，该系统由一次风预热子系统与二次风预热子系统构成，一次风预热子系统、二次风预热子系统与火力发电机组的锅炉系统、汽轮机系统进行耦合，构建新型的锅炉给水预热系统；其中，火力发电机组的锅炉系统与汽轮机系统连接方式为:锅炉(I)的主蒸汽管道(3)与汽轮机高压缸(4)相连，再热蒸汽管道(2)与汽轮机中压缸(5)、汽轮机低压缸(6)依次次串联； 所述一次风预热子系统的连接方式为:一次风机(10)的出口与一号空气加热器(12)的空气入口相连，一号空气加热器(12)、二号空气加热器(13)、疏水冷却器(34)、三号空气加热器(14)的空气侧通过管路依次串联，三号空气加热器(14)的空气出口与热一次风管道(21)相连；汽轮机八段抽汽(42)与一号空气加热器(12)蒸汽入口相连，汽轮机七段抽汽(41)与二号空气加热器(13)蒸汽入口相连，汽轮机一段抽汽(35)与三号空气加热器(14)的蒸汽入口相连；三号空气加热器(14)的疏水出口与一号高压加热器(27)的疏水入口相连，二号空气加热器(13)的疏水出口与一号空气加热器(12)的疏水入口相连，一号空气加热器(12)的疏水出口与凝汽器(8)相连，疏水旁路阀门(47)与疏水冷却器(34)并联； 所述二次风预热子系统的连接方式为:送风机(11)的出口与四号空气加热器(15)的空气入口相连，四号空气加热器(15)、五号空气加热器(16)、六号空气加热器(17)、七号空气加热器(18)、八号空气加热器(19)的空气侧通过管路依次串联，八号空气加热器(19)的空气出口与热二次风管 道(20)相连；汽轮机八段抽汽(42)与四号空气加热器(15)的蒸汽入口相连，汽轮机七段抽汽(41)与五号空气加热器(16)的蒸汽入口相连,汽轮机六段抽汽(40)与六号空气加热器(17)的蒸汽入口相连，汽轮机五段抽汽(39)与七号空气加热器(18)的蒸汽入口相连，汽轮机一段抽汽(35)与八号空气加热器(19)的蒸汽入口相连；八号空气加热器(19)的疏水出ロ经三通阀分别与疏水冷却器(34)和疏水旁路阀门(47)相连，七号空气加热器(18)的疏水出口与六号空气加热器(17)的疏水入口相连，六号空气加热器(17)的疏水出口与五号空气加热器(16)的疏水入口相连，五号空气加热器(16)的疏水出口与四号空气加热器(15)的疏水入ロ相连，四号空气加热器(15)的疏水出ロ与凝汽器(8)相连； 所述锅炉给水预热系统的连接方式为:凝结水泵(9)的出口与五号低压加热器(33)的水侧入口相连，低压加热器(33)、低温省煤器(23)、四号低压加热器(32)、除氧器(29)、给水泵(31)、二号高压加热器(28)、一号高压加热器(27)以及高温省煤器(24)的水侧通过管路依次串联，高温省煤器(24)的水侧出口与锅炉水冷壁(25)相连；汽轮机ニ段抽汽(36)与一号高压加热器(27)的蒸汽侧入口相连，汽轮机三段抽汽(37)与二号高压加热器(28)的蒸汽侧入口相连，汽轮机四段抽汽(38)与除氧器(29)蒸汽侧入口相连；汽轮机五段抽汽(39)与四号低压加热器(32)的蒸汽入口相连，汽轮机八段抽汽(42)与五号低压加热器(33)的蒸汽入口相连；一号高压加热器(27)的疏水出口与二号高压加热器(28)的疏水入ロ相连，二号高压加热器(28)的疏水出口与除氧器(29)的疏水入口相连，四号低压加热器(32)的疏水出口与五号低压加热器(33)的疏水入口相连，五号低压加热器(33)的疏水出ロ与凝汽器(8)相连。
2.根据权利要求1所述的ー种利用汽轮机抽汽的空气预热系统，其特征在于，所述热一次风管道(21)与热二次风管道(20)送入的热风的温度为200°C -360°C。
3.根据权利要求1所述的ー种利用汽轮机抽汽的空气预热系统，其特征在于，所述汽轮机一段抽汽(35)温度范围为400 0C -420 V，汽轮机ニ段抽汽(36)的温度范围为2200C _240°C，汽轮机三段抽汽(37)的温度范围为470°C _490°C，汽轮机四段抽汽(38)的温度范围为370°C _390°C，汽轮机五段抽汽(39)的温度范围为290°C _310°C，汽轮机六段抽汽(40)的温度范围为220°C _240°C，汽轮机七段抽汽(41)的温度范围为140°C _160°C，汽轮机八段抽汽(42)的温度范围`为80°C -100°C。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244944A (zh) * | 2013-05-14 | 2013-08-14 | 华北电力大学 | 一种利用汽轮机抽汽的空气预热系统及预热方法 |
| CN103836636A (zh) * | 2014-03-25 | 2014-06-04 | 山东英电节能科技有限公司 | 一种降低热一次风冷风掺入率的装置 |
| CN104132363A (zh) * | 2014-07-31 | 2014-11-05 | 上海理工大学 | 开式制粉蒸汽暖风型锅炉机组及其发电系统 |
| CN105444152A (zh) * | 2015-12-23 | 2016-03-30 | 广州粤能电力科技开发有限公司 | 加热锅炉二次风的热电厂供热蒸汽过热度利用系统 |
| CN106524127A (zh) * | 2016-11-27 | 2017-03-22 | 冯伟忠 | 一种蒸汽冷却器系统及其降低抽汽过热度的方法 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103244944A (zh) * | 2013-05-14 | 2013-08-14 | 华北电力大学 | 一种利用汽轮机抽汽的空气预热系统及预热方法 |
| CN103244944B (zh) * | 2013-05-14 | 2015-01-07 | 华北电力大学 | 一种利用汽轮机抽汽的空气预热系统及预热方法 |
| CN103836636A (zh) * | 2014-03-25 | 2014-06-04 | 山东英电节能科技有限公司 | 一种降低热一次风冷风掺入率的装置 |
| CN103836636B (zh) * | 2014-03-25 | 2016-09-14 | 山东英电环保科技有限公司 | 一种降低热一次风冷风掺入率的装置 |
| CN104132363A (zh) * | 2014-07-31 | 2014-11-05 | 上海理工大学 | 开式制粉蒸汽暖风型锅炉机组及其发电系统 |
| CN105444152A (zh) * | 2015-12-23 | 2016-03-30 | 广州粤能电力科技开发有限公司 | 加热锅炉二次风的热电厂供热蒸汽过热度利用系统 |
| CN105444152B (zh) * | 2015-12-23 | 2018-08-10 | 广州粤能电力科技开发有限公司 | 加热锅炉二次风的热电厂供热蒸汽过热度利用系统 |
| CN106524127A (zh) * | 2016-11-27 | 2017-03-22 | 冯伟忠 | 一种蒸汽冷却器系统及其降低抽汽过热度的方法 |
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