WO2015150145A2 - Conduite d'eau de refroidissement comportant un puits ascendant et un puits de chute - Google Patents

Conduite d'eau de refroidissement comportant un puits ascendant et un puits de chute Download PDF

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Publication number
WO2015150145A2
WO2015150145A2 PCT/EP2015/056107 EP2015056107W WO2015150145A2 WO 2015150145 A2 WO2015150145 A2 WO 2015150145A2 EP 2015056107 W EP2015056107 W EP 2015056107W WO 2015150145 A2 WO2015150145 A2 WO 2015150145A2
Authority
WO
WIPO (PCT)
Prior art keywords
cooling water
riser
chute
water line
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2015/056107
Other languages
German (de)
English (en)
Other versions
WO2015150145A3 (fr
Inventor
Uwe Juretzek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP15741775.9A priority Critical patent/EP3087258A2/fr
Publication of WO2015150145A2 publication Critical patent/WO2015150145A2/fr
Publication of WO2015150145A3 publication Critical patent/WO2015150145A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits

Definitions

  • the present invention relates to a cooling water pipe for a power plant and to a power plant, which comprises such a cooling water pipe.
  • the cooling water supply in a power plant takes place via a cooling water pipe.
  • Generic cooling water supplies are 20809/83 B approximately at the AU or EP 2447479 AI beschrie ⁇ ben.
  • suitable pumps are typically provided, via which the flow rate or the flow behavior of the cooling water can be set significantly.
  • the pumps for providing cooling water have an essential task. Fallen namely damage caused from such pumps must we ⁇ strus be partially shut down within less time the entire power plant, since the capacitor can no longer be supplied with sufficient cooling power.
  • redundant pumps with hydraulically operated adjustment flaps in particular flaps (including counterweight), which are designed as combined shut-off / non-return flaps or motor-operated shut-off flaps (eg 2 ⁇ 50%), are used in modern cooling water lines a pump, at least to maintain the cooling water supply partially using the other pump.
  • the adjustment flaps are typically located at the outlet of the pumps and serve initially to shut off the pump which is not in operation, in order to prevent backflow of the cooling water through the pump.
  • the setting ⁇ flaps are designed to close controlled at pump failure, in order to avoid in particular pressure surges. This is sufficient, especially near the end position of the adjustment flaps to be done slowly.
  • a disadvantage of these known from the prior art technical adjustment flaps is that these are sometimes prone to failure even as active components and are subject to a risk of failure.
  • the hydraulic or mo ⁇ toric operation of the adjustment flaps can be prevented, for example, during a disturbance ⁇ tion of the electrical power supply and thus have the failure of the pump result.
  • the adjustment flaps are very expensive components, in particular if they are moved hydraulically, the operation of which also requires regular maintenance.
  • a cost-effective technical solution is vorzu ⁇ beat, which also allows to ensure safe operation of the cooling water pipe even in case of failure.
  • the occurrence and propagation of pressure surges in the cooling water line should also be largely avoided.
  • a cooling water pipe for a power plant which is connected to a capacitor included therein, and in which, in normal operation, upstream of the condenser, a riser shaft arranged downstream therewith Falling shaft is included, as well as one of the
  • Cooling water line comprised feed pump which is angeord ⁇ net, that in the riser shaft or upstream of the riser shaft in the cooling water line cooling water can be acted upon with a flow.
  • a power plant which includes such a previously as well as below described cooling water pipe.
  • the normal operating Be ⁇ refers to a normal operation of cooling water is conveyed in which cooling water in the cooling water pipe in a predetermined direction from the uptake shaft to the chute and to the condenser.
  • a cooling water line for a power plant relates in particular to a cooling water line of a power plant.
  • the arrangement of the feed pump upstream of the riser takes place according to execution in a region in which the cooling water temperature has at most 60 ° C.
  • the feed pump is connected between the riser shaft and a cooling tower.
  • the flow application by means of the feed pump according to the invention is designed such that cooling water is conveyed into the riser and is transferred from there into the chute. In the chute falls or flows Cooling water due to earth gravity to a lower location, from where the cooling water continues to sink or can already escape.
  • the uptake shaft is we ⁇ iquess partially disposed within the chute.
  • the riser shaft and the shaft are both connected to each other only by means of a suitable overflow pipe, so that a spatial integration of the riser shaft into the chute is not absolutely necessary.
  • the invention thus provides that adewasserlei ⁇ tion for a power plant has a riser shaft and a downstream arranged chute.
  • Förde ⁇ tion of cooling water by means of the feed pump in this case the cooling water is moved in the riser against the gravitational acceleration upwards. After reaching the upper limit of the riser, the water is transferred to the chute. From there, the water can be transported further in the cooling water line. The further transport takes place here ⁇ on the basis of geodetic pressure conditions in the chute.
  • a power plant, having an inventive cooling ⁇ water pipe approached, be, for example, cooling water is in the riser shaft at a height level, which is ge ⁇ ringer, as the level of the upper limit of the riser shaft. Only by operating the feed pump so much water is conveyed into the riser that it flows over Errei ⁇ chen the upper limit in the chute. The overflowing cooling water makes the height level of thedewas ⁇ sers in the chute also increase until a height level reached at which the geodetic pressure conditions ⁇ nep are sufficient in the chute in order to convey the cooling water in the cooling water pipe on.
  • the solution according to the invention can completely dispense with the provision of an adjustment flap, as a result of which maintenance-related and safety-related advantages are the result.
  • riser and fall wells can be built relatively inexpensively depending on the appropriate mate ⁇ rial inches. Maintenance of these components of the power plant can be achieved relatively quickly and inexpensively due to their simple geometry.
  • shut-off valves eg the butterfly valves on the condenser
  • the pump pressure may reach the zero head.
  • the cooling water level in the chute would rise until it overflows, insofar as the height of the chute defines the maximum pressure in the chute Cooling water system and no longer the zero head of the cooling water pump.
  • the defined height of the overflow from the riser into the chute causes the cooling water pump can not run out of Kenn ⁇ line, as always one of the height of the riser shaft corresponding minimum pressure can be maintained.
  • the feed pump is designed as a shaft ⁇ pump, which is arranged in particular in the riser shaft.
  • a shaft pump is hereby in
  • no A ⁇ damper is provided between the pump and the capacitor, in particular at the outlet of the feed pump.
  • An adjustable adjustment flap would typically be hydraulically operable (see obi ⁇ ge explanations) and can also be opened or closed against the pressure of the feed pump. By avoiding the provision of an adjustment flap in the cooling water line, costs can be saved as well as maintenance and security risks avoided.
  • the execution adjustment flap in the sense of a butterfly valve and / or a non-return valve to be understood.
  • closing flaps which are associated with the capacitor.
  • the riser shaft has at least a minimum height of 8m and in particular has a maximum height of 30m.
  • a riser shaft at least two chutes is assigned such that when promoting cooling water through the riser the subsidized cooling water is divided on the at least two chutes.
  • the ⁇ in the separate cooling water streams in the chutes can are subsequently used to target to provide about differing ⁇ che capacitor halves separately with cooling water.
  • a chute of the cooling water pipe is assigned at least two riser shafts such that when conveying cooling water through the at least two riser shafts the geför ⁇ derte cooling water is combined in a chute.
  • at least two risers in particular precisely two risers, a higher redundancy factor can be achieved by providing several relatively smaller feed pumps in the risers which carry a comparable amount of cooling water as compared to possibly a larger pump in a single riser ,
  • the entire cooling water supply system can be maintained on the cooling water line, namely by the other feed pumps in the other riser shafts continue to carry cooling water in the common chute. Since the cooling water from the various riser shafts in one
  • the cooling water line according to the invention it is provided that the GR ilias a riser duct and / or the chute comprises a tube ⁇ comprising a glass fiber reinforced plastic or other composite material. Since these composite materials can be relatively easily manufactured and prefabricated, a riser and / or chute can be built in a short construction time. In addition, such pipes can be manufactured very inexpensively, so that a farmer ⁇ schaftaji advantage exists. Alternatively or additionally, it may be provided that the at least one chute and / or riser comprises a reinforced concrete structure. Even such structures can be made without relatively large construction effort, without causing high costs. As will be built during the construction of a power plant reinforced concrete structures oh ⁇ Nehin many places, the provision of a chute and / or riser shaft for precisely this material may be provided particularly economically and without further logistical Vorkeh- requirements.
  • the at least one riser has a closable branch, in particular upstream of the feed pump, via which branch cooling water can be removed for the purpose of draining. Since the cooling water is increasingly enriched with salts during operation, it is he ⁇ necessary to replace this. For this purpose, a portion of cooling water can be selectively removed from the riser shaft for draining via a corresponding branch, which is in turn replaced by fresh cooling water elsewhere.
  • the Abzwei ⁇ tion is, for example, via a suitable valve closed.
  • the at least one chute having a 29 Spotifyba ⁇ re feed, via which chemical substances may be added for chemical treatment of the cooling water. Since in the chute sometimes a more turbulent Strö ⁇ mung prevails than in the further downstream cooling water pipe sections, can at this point of the
  • Chute added chemical substances are particularly well mixed in the cooling water.
  • the supply may be arranged at a location of the chute, which does not require the supply of chemical substances under elevated pressure. Addition of the chemicals at pressures slightly higher than the ambient pressure is possible.
  • a plurality of riser shafts is provided with each downstream chutes and each to ⁇ ordered feed pumps, wherein the plurality of chutes opens into a common inlet into the cooling water pipe.
  • the plurality of riser ducts is also typically supplied with cooling water by a common connection area according to a further embodiment of the cooling water duct.
  • FIG. 1 shows a first embodiment of the invention
  • Cooling water pipe in schematic sectional view from the side;
  • Figure 2 shows another embodiment of the invention
  • Cooling water line in schematic sectional view from the side (including drainage and chemical dosing connection);
  • FIG. 3 shows a further embodiment of the cooling water line according to the invention in a lateral schematic sectional view
  • Figure 4 is a cross sectional view through riser shaft and case ⁇ bay according to a particularly preferred form ⁇ guide the cooling water line according to the invention
  • FIG. 5 is a cross-sectional view through riser shaft and case bay according to another particularly before ⁇ ferred embodiment of the cooling water line according to the invention
  • FIG. 6 shows a further embodiment of the invention
  • Cooling water line in a schematic sectional view from one side.
  • FIG. 1 shows a side sectional view through a first embodiment of the cooling water pipe 1 according to the invention, which may be about from a steam part comprehensive power plant (not shown in the present case) may be included.
  • the cooling water line 1 comprises a riser shaft 10, which is associated with a chute 11, wherein in the base region of the riser shaft 10, a feed pump 12 is arranged.
  • the system of riser shaft 10, chute 11 and feed pump 12 are fluidly connected in the cooling water line such that the cooling water 5 is supplied via a cooling water inlet 3 to the riser 10 initially.
  • the capacitor 2 is used according to supply the steam part of a not provided with reference ⁇ sign power plant with cooling power.
  • the delivery pump 12 conveys cooling water 5 in such a way that it is transferred continuously into the chute 11 at the upper boundary of the riser shaft 10. Due to the height conditions or pressure loss ratios in the cooling water pipe 1, a substantially constant level level in the course of the operation of the cooling water pipe 1 levels off
  • Chute 11 a This is sufficient to establish a stati ⁇ 's pressure in the base region of the chute 11, so that the cooling water is located there in the direction of the condenser 2 and subsequent to this closing systems or system sections can be transported in theisserwasserlei ⁇ processing. 1
  • the level in the riser 10 drops, so that no wei ⁇ teres cooling water 5 is transferred into the chute 11 more.
  • the thereby changing pressure conditions in the riser ⁇ shaft 10 can cause the feed pump 12 mitun ⁇ ter pressure fluctuations on the cooling water column in the riser shaft transmits. However, these are not transmitted to the water column in the chute, and therefore can not propagate towards the condenser. In this respect, the feed pump 12 is decoupled from the condenser 2.
  • Figure 2 shows a further embodiment of the inventive cooling water pipe 1 in a schematic sectional view from the side, wherein the embodiment shown differs from the embodiment shown in Figure 1 only in that in the riser 10, a branch 15 is seen before ⁇ , over which for cooling cooling water 5 can be removed.
  • the branch 15 may in this case be provided with a valve not shown, which designed the branch 15 closable.
  • the embodiment has the cooling water pipe 1 shown in figure 2 to a feeder 16, which is likewise closed by means of a not shown valve being ⁇ staltet.
  • chemi ⁇ cal substances can be introduced into the cooling water 5 via the supply 16, so that in the region of the chute 11, a mixture of both liquids or substances can be carried out.
  • Figure 3 shows a further embodiment of the erfindungsge ⁇ MAESSEN cooling water pipe 1 in a lateral sectional view noted- differs from that shown in Figure 1, the effect that the arrangement of the riser shaft 10 has to chute 11 a different geometry.
  • the riser shaft 10 is provided centrally in the chute 11 and substantially without contact of the respective walls.
  • an area of the wall of the riser shaft 10 is in a region of the inner wall of the chute 11 Contact.
  • the riser 10 may be designed as a plurality of risers 10.
  • the chute 11 may be configured as a plurality of chutes 11. Such embodiments are described below.
  • Figure 4 shows a cross-sectional view through an execution ⁇ form the cooling water pipe 1 according to the invention as shown for example in FIG. 3
  • the cross-section shown in FIG. 4 refers to the sectional plane designated IV-IV in FIG. 3.
  • the embodiment has only one riser shaft 10, wherein the riser shaft 10 is assigned two separated downflow shafts 11 arranged next to one another , When cooling water emerges in the region of the upper boundary of the riser shaft 10, the cooling water is split between the two gravity wells 11 and can be removed separately.
  • the capacitor 2 not shown can be supplied via two separate streams with cooling ⁇ water.
  • FIG 5 shows an alternative to the embodiment according to FIG 4, the arrangement of the riser duct 10 and chute 11.
  • two separa te ⁇ riser ducts 10 are present provided that share a side wall with each other.
  • the overflowing from the riser shafts 10 in the upper region of the boundary cooling water flows into the common chute 11 a. Consequently, the mixed from the two risers 10 in the chute 11 mixed cooling water.
  • An advantage of such an embodiment the provision of a possible redundancy of feed pumps, which are associated with the riser shafts 10, since in case of failure of a feed pump, a riser 10 can be taken out of service, but without having to interrupt the operation of the entire cooling water pipe 1.
  • FIG. 6 shows a side sectional view of another possible embodiment of the invention, which in addition to two risers 10 (dashed lines) each have a chute 11 associated therewith.
  • the two chutes 11 have a common inlet 20, via which the discharged into the chutes 11 cooling water 5 can mix to about about the cooling water discharge 4 (frontal view) to the capacitor 2 (not shown in the present case) from ⁇ led. Further embodiments emerge from the subclaims.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une conduite d'eau de refroidissement (1) destinée à une centrale électrique, qui est raccordée à un condenseur (2) qu'elle entoure, un puits ascendant (10) en amont du condenseur (2) en fonctionnement normal étant entouré par un puits de chute agencé en aval. Une pompe d'alimentation (12) entourée par la conduite d'eau de refroidissement (1) est agencée de telle manière que l'eau de refroidissement (5) peut être soumise à un courant dans le puits ascendant (10) ou en amont du puits ascendant (10) dans la conduite d'eau de refroidissement (1).
PCT/EP2015/056107 2014-04-03 2015-03-23 Conduite d'eau de refroidissement comportant un puits ascendant et un puits de chute Ceased WO2015150145A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15741775.9A EP3087258A2 (fr) 2014-04-03 2015-03-23 Conduite d'eau de refroidissement comportant un puits ascendant et un puits de chute

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14163337.0A EP2927437A1 (fr) 2014-04-03 2014-04-03 Conduite d'eau de refroidissement dotée de puits vertical et de puits de chute
EP14163337.0 2014-04-03

Publications (2)

Publication Number Publication Date
WO2015150145A2 true WO2015150145A2 (fr) 2015-10-08
WO2015150145A3 WO2015150145A3 (fr) 2015-12-17

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PCT/EP2015/056107 Ceased WO2015150145A2 (fr) 2014-04-03 2015-03-23 Conduite d'eau de refroidissement comportant un puits ascendant et un puits de chute

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EP (2) EP2927437A1 (fr)
WO (1) WO2015150145A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2080983A (en) 1975-06-16 1984-02-16 Hudson Products Corp. Condensing steam with the aid of a wet and a dry cooling tower
EP2447479A1 (fr) 2010-10-26 2012-05-02 Siemens Aktiengesellschaft Procédés de refroidissement d'un fluide transporteur d'une centrale électrique, centrales électriques et système de refroidissement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH640598A5 (en) * 1979-09-06 1984-01-13 Sulzer Ag Steam power plant with air-cooled steam condenser
DE19534951C2 (de) * 1995-09-20 1998-02-26 Siemens Ag Kühlkreislauf

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2080983A (en) 1975-06-16 1984-02-16 Hudson Products Corp. Condensing steam with the aid of a wet and a dry cooling tower
EP2447479A1 (fr) 2010-10-26 2012-05-02 Siemens Aktiengesellschaft Procédés de refroidissement d'un fluide transporteur d'une centrale électrique, centrales électriques et système de refroidissement

Also Published As

Publication number Publication date
EP3087258A2 (fr) 2016-11-02
EP2927437A1 (fr) 2015-10-07
WO2015150145A3 (fr) 2015-12-17

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