Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
  • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
  • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
  • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
  • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
  • F01K7/40—Use of two or more feed-water heaters in series
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E20/00—Combustion technologies with mitigation potential
  • Y02E20/14—Combined heat and power generation [CHP]

Definitions

• the invention relates to a steam turbine system with a number of pressure stages arranged on a common turbine shaft.
• the steam turbine system for preheating condensate or feed water carried in the steam circuit of the steam turbine comprises a large number of preheaters of a preheating section.
• a correspondingly complex piping system is provided for connecting the preheaters to one another and to the steam turbine.
• a steam turbine system with a large number of such preheaters is known, for example, from US Pat. No. 5,404,724.
• Such a steam turbine system therefore requires considerable construction effort and a large amount of space due to the construction of the steam turbine and due to the large number of structural components.
• the installation effort when installing such a steam turbine system is particularly high, especially since the steam turbine arranged above the condenser requires a complex supporting structure.
• the invention is therefore based on the object of specifying a particularly compact steam turbine system which can also be assembled in a particularly simple manner.
• a steam turbine system with a number of pressure stages arranged on a common turbine shaft, and with a condenser arranged on the downstream side in the axial direction of the turbine shaft, and with a feed water preheater with a Number of heat exchanger modules which can be heated with bleed steam from each or each pressure stage and which are arranged in a common housing and which are connected in parallel on the feed water side in the m row and on the bleed steam side.
• the invention is based on the consideration that, on the one hand, due to the ground-level arrangement of all relevant structural parts, in particular the steam turbine and the condenser, and the feed water preheater of the preheating section, the assembly effort when installing a steam turbine system is particularly low .
• the compact design of the preheating section due to the compact design of the preheating section, it can be arranged in a particularly space-saving manner and additionally close to the steam turbine.
• a compact design of the preheating section can in turn be achieved by a modular construction of an individual feed water preheater. Corresponding heat exchanger modules can then be connected in series directly on the feed water side in the manner of a multiplex preheater, so that connecting lines are saved.
• a further reduction in the assembly effort is also achieved by arranging the Xarma exchanger modules in a common housing.
• a heat exchanger module per se is known, for example, from the document DE-A-39 05 066.
• two adjacent heat exchanger modules are separated from one another on the tapping steam side by a partition and connected to one another via a collector on the feed water side.
• a busbar common to the heat exchanger modules for the condensed tapped steam is expediently provided.
• the steam turbine is advantageously designed for half speed for use in the power range up to around 350 MW. This means that the rotational frequency of the turbine shaft is equal to half the network frequency (50 or 60 Hz) of the network fed by the generator.
• the advantages achieved by the invention are, in particular, that particularly high efficiency of the steam turbine is achieved due to the axial outflow of the relaxed steam due to the axial arrangement of the condenser on the downstream side of the turbine shaft.
• the steam turbine can be set up practically at ground level and thus without complex supporting structures.
• the compact feed water or multiplex preheater which can also be installed at ground level and in the immediate vicinity of the steam turbine, a particularly compact and space-saving design is achieved overall. The requirements for the statics and the size of the machine house are therefore low.
• the machine house can be designed as a pure weather protection.
• the concept described permits extensive prefabrication of the components, in particular of the heat exchanger modules.
• only especially short pipelines for tapping steam, condensate return and feed water supply are required.
• the steam turbine and the condenser, as well as the feed water requirement and feed water preheating can be planned and manufactured as an integrated unit.
• Darm shows the figure schematically a steam turbine system with a condenser axially arranged to the steam turbine and with a multiplex preheater.
• the steam turbine plant is part of a steam power plant 1 with a steam generator 2.
• the steam turbine plant includes a steam turbine 4 with a high pressure stage 4a and a low pressure stage 4b, which drive a generator 8 via a common turbine shaft 6.
• the steam turbine 4 is designed to run at half speed, i.e. the Turbmenwelle 6 rotates at half the network frequency of the power network to be fed.
• a condenser 10 connected downstream of the steam turbine 4, which is arranged with this in a common housing, is arranged on the downstream side in the axial direction of the turbine shaft 6 and therefore next to the steam turbine 4.
• the condenser 10 is connected on the output side to a feed water preheater 14 or multiplex preheater via a feed water line 12 into which a feed water pump 13 is connected.
• the feed water preheater 14 mounts the steam generator 2 on the output side via a feed water line 16 m, which in turn is connected on the output side to a high pressure part 4 a of the steam turbine 4 via a live steam line 18
• the multiplex preheater 14 comprises two heat exchanger modules 20, 22, which are arranged in a common housing 24. Each heat exchanger module 20, 22 of the multi Tapping steam A or A h is applied to tiplex preheater 14. Pressure and temperature of the bleed steam A ,,, A lies of the location of the respective bleed of the steam turbine 4.
• the bleed steam A- is taken from the low pressure stage 4b of the steam turbine 4, whereas the bleed steam A r from the high pressure stage 4a of the steam turbine 4 is removed.
• the bleed steam A has a high temperature and a high pressure, while the bleed steam A has a comparatively low temperature and a comparatively low pressure.
• the heat exchanger modules 20, 22 arranged one behind the other are accordingly designed for the different pressure ranges of the bleed steam A or A.
• bleed steam A. from the high pressure stage 4a of the steam turbine 4 or also bleed steam A from the low pressure stage 4b of the steam turbine 4 can also be supplied to the heat exchanger modules 20, 22.
• further heat exchanger modules and / or further steam taps A can be provided.
• a partition 26 is provided between the heat exchanger module 20 and the heat exchanger module 22.
• the heat exchanger modules 20, 22 smd thus connected in parallel on the bleed steam side.
• the heat exchanger modules 20, 22 are connected to one another via a collector 28.
• the collector 28 forms part of the partition wall 26. Additional collectors 30, 32 smd are provided at the feedwater-side inlet or outlet of the multiplex preheater 14.
• a number of feed water pipes 34 and 36 are provided in each of the heat exchanger modules 20, 22.
• the feed water pipes 34 of the heat exchanger module 20 smd in this case on the input side with the discharge collector 30 and on the output side connected to the collector 28.
• the feed water pipes 36 of the heat exchanger module 22 are connected on the inlet side to the collector 28 and on the outlet side to the outlet collector 32.
• the heat exchanger modules 20, 22 of the multiplex preheater 14 are thus connected in series on the feed water side.
• a common busbar 38 for condensed bleed steam A. is provided in the heat exchanger modules 20, 22.
• Both the steam turbine 4 with the condenser 10 switched on and the multiplex preheater 14 are arranged at ground level and particularly close to one another.
• the space requirement for the steam turbine system is therefore particularly small.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Engine Equipment That Uses Special Cycles (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Hydrogen, Water And Hydrids (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Commercial Cooking Devices (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (2)

Family

ID=7774337

Family Applications (1)

Country Status (17)

Families Citing this family (13)

Family Cites Families (13)

• 1995
  • 1995-10-09 DE DE19537478A patent/DE19537478C1/de not_active Expired - Fee Related
• 1996
  • 1996-09-24 IN IN1692CA1996 patent/IN189449B/en unknown
  • 1996-10-08 AT AT96944570T patent/ATE213052T1/de active
  • 1996-10-08 RU RU98108601/06A patent/RU2169270C2/ru not_active IP Right Cessation
  • 1996-10-08 EP EP96944570A patent/EP0854969B1/de not_active Expired - Lifetime
  • 1996-10-08 PT PT96944570T patent/PT854969E/pt unknown
  • 1996-10-08 JP JP09514628A patent/JP2000511254A/ja active Pending
  • 1996-10-08 WO PCT/DE1996/001924 patent/WO1997013960A2/de not_active Ceased
  • 1996-10-08 AU AU13007/97A patent/AU700618B2/en not_active Ceased
  • 1996-10-08 CN CN96197366A patent/CN1083526C/zh not_active Expired - Fee Related
  • 1996-10-08 KR KR1019980702605A patent/KR19990064124A/ko not_active Abandoned
  • 1996-10-08 ES ES96944570T patent/ES2172702T3/es not_active Expired - Lifetime
  • 1996-10-08 CA CA002234227A patent/CA2234227A1/en not_active Abandoned
  • 1996-10-08 BR BR9611008A patent/BR9611008A/pt not_active IP Right Cessation
  • 1996-10-08 DK DK96944570T patent/DK0854969T3/da active
  • 1996-10-08 DE DE59608712T patent/DE59608712D1/de not_active Expired - Lifetime
  • 1996-10-09 TW TW085112340A patent/TW331580B/zh active
• 1998
  • 1998-04-09 US US09/057,829 patent/US6029454A/en not_active Expired - Lifetime

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