Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28B—STEAM OR VAPOUR CONDENSERS
  • F28B9/00—Auxiliary systems, arrangements, or devices
  • F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
  • F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid

Definitions

• the invention relates to a cooling system for cooling water from the condenser of a steam power plant.
• a steam power plant is usually used to generate electrical energy or to drive a machine.
• a working medium usually a water-steam mixture, carried in an evaporator circuit of the steam power plant is evaporated in an evaporator.
• the steam generated thereby relaxes while performing work in the steam turbine of the steam power plant and is then fed to its condenser.
• the working medium condensed in the condenser is then fed again to the evaporator via a feed water pump.
• the condensation of the working medium in the condenser is usually carried out by exchanging heat with this supplied cooling water, which heats up in the process.
• the heated cooling water is usually in turn cooled in a recooling system by exchanging heat with the ambient air.
• the cooled cooling water is then available again for cooling the condenser.
• the recooling system usually comprises a number of cooling towers. Each cooling tower is associated with a collecting basin connected to a collecting channel, in which cooled cooling water is collected. From there, the recooled cooling water is returned to the condenser via a condenser pump.
• a back-cooling system is generally adapted to the conditions of the power plant site and therefore requires considerable constructional and constructive effort. moreover for such a recooling system, a complex individual level control for the water level of each collecting basin is required.
• the invention is therefore based on the object of specifying a recooling system for cooling water from the condenser of a steam power plant, which can be installed and operated in a particularly simple manner.
• a recooling system of the above-mentioned type with a number of cooling modules, each of which can be fed via a water supply duct assigned to it, the water supply ducts in the manner of pipes communicating with one another and via a common main cooling water line are connected to the capacitor.
• the invention is based on the consideration that the installation effort for the cooling system is reduced by standardized components.
• this can be adapted in the manner of a modular system to the respective power plant.
• the recooling system can also be operated particularly easily if an individual level control for each water collection basin assigned to a cooling module is replaced by a level control common to all water collection basins.
• a level control common to all water reservoirs can be achieved in that a central water supply is designed for all cooling modules in such a way that a variation of the cooling water inflow to one cooling module leaves the cooling water inflow to the other cooling modules almost unchanged.
• Such a design can be achieved by connecting the water supply shafts. the one based on the principle of communicating pipes.
• the term "communicating pipes” is defined, for example, in "Duden: The Great Dictionary of the German Language", Volume 5 (1980), Bibliografisches Institut Mannheim.
• the level of a liquid in the interconnected, open top tubes m of each tube is the same.
• the water supply shafts of all cooling modules thus have the same water level, so that the inflow of cooling water to all cooling modules can be controlled centrally.
• a particularly simple and reliable water level control namely based on the operating conditions prevailing in the condenser and also by means of the cooling water pump, can be achieved in that the interconnected water supply ducts are connected to the condenser via a common main cooling water line.
• a water overflow is expediently connected to the water supply, whose output is connected to a water return flow.
• the operating conditions for each cooling module are thus at least approximately independent of the cooling water conditions in the condenser and the operating state of the condenser pumps.
• each water supply shaft can be shut off by means of an inlet fitting assigned to it.
• the water supply to each cooling module can thus be regulated with particularly simple means. In the event of maintenance or Repair work on a cooling module can easily interrupt its water supply, the water overflow serving as a bypass for the excess cooling water flow. Thus, even when a cooling module is shut off, the water supply m is unchanged in the other cooling modules. This means that complex level control in the cooling module sump is not necessary, even if one or more cooling modules are shut off.
• the advantages achieved by the invention consist in particular in that, on the one hand, due to the modular structure of the recooling system, it is particularly flexibly adaptable to a given power plant concept in the manner of a modular system, whereby standard components can be used.
• the design of the water supply shafts which are in the manner of communicating pipes and are connected to the condenser of the steam power plant via a common main cooling water line, makes the recooling system particularly flexible during operation.
• the total flow of the cooling water to be cooled can be divided into a first partial flow, which is cooled in cooling modules, and a second partial flow which is returned directly to the water return via the water overflow without cooling in the manner of a bypass.
• the operation of each cooling module and the entire recooling system can also be maintained without the use of uncontrolled cooling water pumps within the tolerances specified without complex level regulation.
• FIG. 1 a re-cooling system for cooling water from the condenser of a steam power plant with a number of cooling modules
• the recooling system 1 for cooling water from the condenser 2 of a steam power plant according to FIG. 1, which is not shown in detail, comprises a number of cooling modules 4. Each cooling module 4 is associated with a fan 6. The cooling modules 4 are connected to the condenser 2 on the cooling water inlet side via a main cooling water line 8 and on the cooling water outlet side via a cooling tower return duct 10 and a cooling water pump unit 12. The condenser 2 is connected on the primary side to the only indicated water-steam circuit 14 of the steam power plant.
• the cooling modules 4 smd are standardized in terms of their dimensions and rain area. An adaptation to the specific requirements of the steam power plant is possible in a particularly simple manner by a suitable selection and combination of the cooling modules 4. 1 shows a row arrangement of the cooling modules 4. Alternatively, however, other arrangements, for example in pairs or in block form, are also possible.
• a water supply shaft 20 according to FIG. 2 is assigned to each cooling module 4.
• the water supply shafts 20 are connected to the common main cooling water pipe 8.
• the water supply shafts 20 smd both with each other via a water supply channel 22 and with the condenser sator 2 of the steam power plant connected via the main cooling water line 8 in the manner of communicating pipes.
• the cooling module 4 assigned to the respective water supply shaft 20 can be supplied with cooling water K from the condenser 2 of the steam power plant via the main cooling water line 8 and the supply channel 22 and via the water distribution line 26.
• each cooling module 4 is connected to a cooling tower return channel 10 common to all cooling modules 4 via a collecting basin (not shown) assigned to it and a basin drain shaft 28.
• the cooling tower return duct 10 is in turn connected to the condenser 2 via the cooling water pump unit 12.
• a water overflow 32 is connected to the main water line 8 and is connected on the outlet side to the cooling tower return channel 10.
• a weir wall 34 arranged in the water overflow 32 maintains a constant water level 36 in the water overflow 32 and thus also a constant water level 36 'at the same height in each water supply shaft 20 connected to the water overflow 32 in the manner of communicating pipes.
• a partial cooling water quantity K ′ that cannot be supplied to the cooling modules 4 flows over the weir wall 34 of the water overflow 32 and is thus directly mixed with the cooled cooling water K ′′ flowing in the cooling tower return channel 10 Bypasses an overfeed of the water supply shafts 20 and the water distribution lines 26 of the cooling modules 4.
• cooling water K to be cooled For example, for maintenance or repair work on a cooling module 4, this can be done by means of the inlet type assigned to it. Matur 24 can be shut off so that the inflow of cooling water K to be cooled is prevented. In this case, the cooling water subset K 1 of the over the water overflow 32 to the ge ⁇ supercooled Kuhlwasser K "admixed ungekuhlten Kuhlwassers The influx, however, increased accordingly. Of to be cooled cooling water K to the non-locked Kuhlmodulen 4 remains due to the unchanged water level 36 'in these each assigned water supply chute 20 unchanged, so that even when a cooling module 4 is shut off, no complex level regulation or inflow regulation in the other cooling modules 4 is required.
• the Ruckkuhlsystem 1 is thus particularly easy to adapt to different requirements.
• the ratio of the recooled cooling water K to the non-recooled cooling water subset K 1 can be varied in a particularly simple manner and can thus be adapted to different operating conditions of the steam power plant.
• the recooling system 1 of the steam power plant is particularly flexible and can be used in a simple manner.
• the cooling modules 4 can be designed in a wooden construction, steel skeleton construction or also in a reinforced concrete construction.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Engine Equipment That Uses Special Cycles (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (2)

Family

ID=7779795

Family Applications (1)

Country Status (14)

Cited By (1)

Families Citing this family (2)

Family Cites Families (8)

• 1996
  • 1996-11-18 IN IN1997CA1996 patent/IN192591B/en unknown
  • 1996-11-29 RU RU98113146/06A patent/RU2164330C2/ru active
  • 1996-11-29 DE DE59604506T patent/DE59604506D1/de not_active Expired - Lifetime
  • 1996-11-29 ES ES96945758T patent/ES2143805T3/es not_active Expired - Lifetime
  • 1996-11-29 CN CN96197646A patent/CN1131985C/zh not_active Expired - Lifetime
  • 1996-11-29 UA UA98052682A patent/UA41465C2/uk unknown
  • 1996-11-29 CA CA002240099A patent/CA2240099C/en not_active Expired - Lifetime
  • 1996-11-29 EP EP96945758A patent/EP0865596B1/de not_active Expired - Lifetime
  • 1996-11-29 KR KR10-1998-0704106A patent/KR100408325B1/ko not_active Expired - Lifetime
  • 1996-11-29 WO PCT/DE1996/002298 patent/WO1997021966A2/de not_active Ceased
  • 1996-11-29 JP JP52160497A patent/JP3839488B2/ja not_active Expired - Lifetime
  • 1996-11-29 AU AU17660/97A patent/AU707461B2/en not_active Expired
  • 1996-12-09 MY MYPI96005172A patent/MY115885A/en unknown
• 1998
  • 1998-06-11 US US09/096,228 patent/US6276446B1/en not_active Expired - Lifetime

Also Published As

Similar Documents

Legal Events