德國GS汽機(jī)旁路系統(tǒng)介紹

1、ENGINEERING GmbHENGINEERINGENGINEERING GmbHGmbH汽輪機(jī)旁路系統(tǒng)介紹Turbine Bypass three major functions of the bypass system in power plantStart function:Start function is to improve the unit start characteristic and settings , can improve the boiler in the start-up process of burning rate ,make the steam temp

2、erature get best match ,so as to shorten the unit start time. Overflow function:Overflow function is for absorption machine , furnace imbalances between load and setting . Can discharge unit in the transient process of excessive surplus steam , adjust the stable steam pressure , maintain the boiler

3、runing minimum stable-combustion load in the none-oil-feed condition.Safety function:Can replace the function of the boiler safety valve.電站汽機(jī)旁路系統(tǒng)的三大功能 啟動功能啟動功能：啟動功能是為改善機(jī)組的啟動特性而設(shè)置的。可以提高鍋爐在啟動過程中的燃燒率；使蒸汽溫度與汽輪機(jī)缸溫得到最佳匹配；從而縮短機(jī)組啟動時間。溢流功能是為吸收機(jī)、爐之間的不平衡負(fù)荷而設(shè)置的?？梢耘判箼C(jī)組在負(fù)荷瞬變過度過程中的剩余蒸汽；調(diào)整穩(wěn)定蒸汽壓力；維持鍋爐在不投油情況下的最低穩(wěn)燃負(fù)荷。

4、可設(shè)計為具備替代鍋爐安全閥的功能。 溢流功能溢流功能： 安全功能安全功能： The composition of the turbine bypass system 汽機(jī)旁路系統(tǒng)的構(gòu)成汽機(jī)高低壓串連旁路 Serie turbine bypass system：v 高壓旁路高壓旁路HPHP：鍋爐過熱器再熱器 包括高旁蒸汽變換閥HP stream transfer valve、高旁噴水調(diào)節(jié)閥HP water injection control valve、高旁噴水隔離閥HP isolate valvev 低壓旁路低壓旁路LPLP：鍋爐再熱器凝汽器 包括低旁蒸汽變換閥LP stream transf

5、er valve 、低旁噴水調(diào)節(jié)閥LP water injection control valve 、低旁噴水隔離閥LP water injection control valve旁路系統(tǒng)的容量v國內(nèi)200MW600MW機(jī)組通常為： v歐美通常為：(100情況下取代鍋爐安全閥)*BMCR鍋爐最大連續(xù)出力3070BMCR*40100BMCR*旁路閥門的主要材質(zhì) 高旁閥系統(tǒng)高級合金鋼鍛造 常用材料：A182F91 A182F22v 低旁閥系統(tǒng)合金鋼鍛造或鑄造 常用材料：A182F91 A182F22 A216GrWCB旁路執(zhí)行機(jī)構(gòu)方式vPNEUMATIC氣動 特點(diǎn)：結(jié)構(gòu)簡單、速度快、維修方便。vH

6、YDRAULIC液動 特點(diǎn)：速度快、結(jié)構(gòu)復(fù)雜、價格稍貴，國外應(yīng)用范圍廣vELECTRIC電動 特點(diǎn)：執(zhí)行靈活、準(zhǔn)確、穩(wěn)定、價格稍便宜HP Bypass valveGS design and production of the bypass valve, compact structure, less warm water atomization unique way to provide the most optimized design and state-of-the-art application technology for the bypass system. The small b

7、ypass valve noise, little vibration, rigor, adjustable parameters than the range, operational stability, spool erosion resistance and corrosion resistance. GS設(shè)計和生產(chǎn)的旁路閥門，結(jié)構(gòu)精巧，減溫水霧化方式獨(dú)特，為旁路系統(tǒng)提供最優(yōu)化的設(shè)計和最先進(jìn)的應(yīng)用技術(shù)。保證旁路閥門的噪音小，振動小，密封性好，參數(shù)可調(diào)比范圍大，操作穩(wěn)定性好，閥芯耐沖刷和耐腐蝕性強(qiáng)。設(shè)計優(yōu)點(diǎn)：1.閥體下部減溫水噴射2.蒸汽輔助減溫水霧化3.調(diào)節(jié)比率1:100（全工況）4.

8、出口溫度T2接近飽和溫度Ts5.減溫水所需壓力較低6.霧化均勻快速，混溫段短7.不可拆卸部件免維護(hù)Feature：1.Downstream injection2.Steam atomisation3.Turn down ratio 1:1004.Temperature T2 near Ts5.Low water pressure6.Short mixing track7.Maintenance freeHP Bypass valve 鍛件材料DIN 1.7335(F11) 1.7380 (F22) 1.4903 (F91) 1.4901 (F92)有效規(guī)格 入口 DN50-DN600 出口 D

9、N80-DN1500多級籠式閥芯設(shè)計最多可定制10級降壓Forged materialsDIN 1.7335 (F11) 1.7380 (F22) 1.4903 (F91) 1.4901 (F92)Available sizes Inlet DN50-DN600 OutletDN80-DN1500Multistage silencerLP-Bypass ValveFeatures1. downstream injection2. steam atomisation3. turn down ratio 1:1004. Temperature T2 near Ts5. Low water pres

10、sure6. short mixing track7. maintenance free特點(diǎn)：1.下游噴注2.蒸汽輔助霧化3.調(diào)節(jié)比率1:1004.出口溫度T2接近飽和溫度Ts5.注水壓力較低6.霧化均勻、時間短7.免維護(hù)Features:1. downstream injection2. steam atomisation3. turn down ratio 1:1004. Temperature T2 near Ts5. Low water pressure6. short mixing track7. maintenance free特點(diǎn)：1.下游噴注2.蒸汽輔助霧化3.調(diào)節(jié)比率1:10

11、04.出口溫度T2接近飽和溫度Ts5.注水壓力較低6.霧化時間短7.免維護(hù)HP Overflow Valve 流開型溢流旁路閥（取代鍋爐安全放空閥）流開型溢流旁路閥高壓旁路閥高壓旁路閥型式型式: :SOVHigh Pressture Bypass ValveType:SOVSafety Overflow valve（SOV）The valve with its elctro-hydraulic control system corresponds，as regards its construction and function，to the safety recommendations of

12、the German vapourboiler commission.uThe structural design of high-pressure steam assisted by water atomization the Germany GS companys patented technology, is the major innovation of the bypass valve technology. Invented in early 90s, patent was used by several German companies.uThe lower cutoff sea

13、t with a lap-channel, high-pressure steam when the spool Enlight quickly flows into this channel, then shot into the area of low pressure valve chamber nozzle through the the sandwich valve body and Venturi caught. （right)uLap less warm water nozzle at the steam outlet within the valve body has less

14、 warm water after a number of tiny nozzles rapidly mixed with a certain angle vapor jet was highly atomized. (Bottom right)uAnnular channel of the valve body arranged along the periphery, less warm water is introduced into the water was spouting from the uniform distribution of the number of holes i

15、n the channel, forming a circle mist encounter was quickly gasified with steam from the high-speed jet, then mixed with buck after the main steam flow to achieve cooling purposes.uThis sprinkler system atomization efficiency and speed of the mixture of water and steam and the temperature is very uni

16、form, than other forms of less warm water atomization efficiency of the system to be many times higher.Bypass atomization system 旁路閥的蒸汽輔助減溫水霧化系統(tǒng)高壓蒸汽輔助減溫水霧化的結(jié)構(gòu)設(shè)計是德國GS公司的專利技術(shù)，是對旁路閥門技術(shù)的重大創(chuàng)新。當(dāng)閥芯微啟時，高壓蒸汽迅速流入輔助蒸汽通道，然后經(jīng)閥體內(nèi)的夾層和文丘里型夾縫引流射入低壓區(qū)閥腔內(nèi)。在蒸汽出口處，閥體內(nèi)部設(shè)有一圈減溫水噴嘴，減溫水經(jīng)眾多細(xì)小噴嘴后與一定角度的蒸汽射流迅速混合并被高度霧化。減溫水由進(jìn)水管引入閥體

17、內(nèi)沿周邊布置的環(huán)形通道，從均勻分布在通道上的眾多小孔中噴射而出，形成一圈水霧，與高速噴射而來的蒸汽相遇被迅速氣化，然后與降壓后的主蒸汽流混合，達(dá)到降溫的目的。這種噴水系統(tǒng)霧化效率高，水和蒸汽混合速度快且溫度十分均勻，比其他形式的減溫水霧化系統(tǒng)效率要高很多倍。GS Structural features of the HP bypassuForge welding of the body structure, durable design life of 30 years.uThe large diameter of the valve stem, valve core and piston i

18、ntegral part of high strength, vibration resistance and long service life.uValve seat and valve core surfacing carbide weld thickness.uThe sealing surface polishing and unbalanced spool seal, ensure that the valve leak-free long-term leakage class of MSS-SP-61, 6.uBy warm water from the steam assist

19、ed atomization, atomization efficiency, the desuperheater fast, uniform temperature distribution.uFully atomized by warm water and steam in the cavity of the multi-level decompression mixed thoroughly to avoid the spool and trim received heat shock, thus extending the service life of the spool.uDesu

20、perheater with the design of the valve of the steam assisted atomization, less gentle mixing efficiency high, the required valve outlet straight pipe shorter.uMultilayer cage design of multi-stage buck spool (the buck of up to 10), to ensure the noise below 85 decibels, the vibrations generated by t

21、he noise completely avoid damage to the spool.uValve adjustable range, and can achieve the accurate adjustment of the design capacity of the full range of very favorable for the slip start control units start and system.uDesuperheating water nozzle distribution along valve body ring without any movi

22、ng parts, does not produce blocking and stuck, no maintenance and replacement.GS高/低壓旁路閥設(shè)計優(yōu)越性l閥體鍛焊結(jié)構(gòu)，經(jīng)久耐用，設(shè)計壽命30年以上。l大直徑閥桿，閥芯和活塞為整體部件，強(qiáng)度高，抗振，使用壽命長。l閥座和閥芯堆焊硬質(zhì)合金，焊層厚度大。l密封面研磨拋光，并采用不平衡式閥芯密封，保證閥門長期無泄漏，泄漏等級達(dá)MSS-SP-61。l減溫水由蒸汽輔助霧化，霧化效率高，減溫速度快，溫度分布均勻。l充分霧化后的減溫水與多級減壓后的蒸汽在空腔內(nèi)混合，徹底避免了閥芯和內(nèi)件收到熱的沖擊，從而延長閥芯的使用壽命。l配有

23、蒸汽輔助霧化設(shè)計的閥內(nèi)減溫，減溫和混合效率極高，所需閥門出口的直管段較短。l多層籠式設(shè)計的多級降壓閥芯（降壓可達(dá)10級），保證噪音低于85分貝，徹底避免由噪音所產(chǎn)生的震動對閥芯的損壞。l閥門可調(diào)范圍大，可實現(xiàn)設(shè)計能力全范圍的精確調(diào)節(jié)，對于機(jī)組的啟動和系統(tǒng)的滑啟控制十分有利。l減溫水噴嘴是沿閥體環(huán)狀分布，無任何移動部件，不會產(chǎn)生阻塞和卡澀，無需維護(hù)更換。 先導(dǎo)型內(nèi)件旁路先導(dǎo)型內(nèi)件旁路閥結(jié)構(gòu)圖閥結(jié)構(gòu)圖閥門按指定閥門按指定開始啟動開始啟動閥門按指定開始啟動高壓蒸汽進(jìn)入閥腔經(jīng)過一級孔板減壓冷卻水進(jìn)入充分霧化減溫經(jīng)過二級孔板平穩(wěn)減壓完成減溫減壓的指令要求。 Spray Water Contorl and

24、 Drain Valve 減溫減溫水疏水調(diào)節(jié)水疏水調(diào)節(jié)閥閥( (直行程和角行程直行程和角行程) )Technical DataBody: angle, Z, or qbbe typePressure ramnq: up to PN 640Nominal diameter: 15-150Working pressure: all commonry used pressure differences, high pressure differences with multistage valve typeGland packings; re-adjustable tare graphite ste

25、m sealing,Body sealing: pure graphiteConnections: butt-weld flange socket weldMaterials: all forgedIn addition to the fitting types describedabove, the valves can be used for othermedia, different applications, and made ofother materialsActuator: pneumatic, hydraulic, electric hard wheelConstruction

26、 and materialSpray water control valveDesign and FunctionThe robust and forged design of the valve body, the wear resistant construction of seat and plug, as well as the low-friction pure graphite stem packing are features to be underlined.Valve plug and seat are ground to zero leakage class VI. During operation,these parts are protected against coarse foreign particles by a perforated cylinder which is installed in the body cover.Advantages-Uncomplicated construction-Suitable for highest pressure drops-Possible body types: angle-, Globe-and Z-type-Easy exchangeability of valve seat