EP2500549A1 - Ecran d'injection pour une centrale à vapeur - Google Patents

Ecran d'injection pour une centrale à vapeur Download PDF

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Publication number
EP2500549A1
EP2500549A1 EP11158049A EP11158049A EP2500549A1 EP 2500549 A1 EP2500549 A1 EP 2500549A1 EP 11158049 A EP11158049 A EP 11158049A EP 11158049 A EP11158049 A EP 11158049A EP 2500549 A1 EP2500549 A1 EP 2500549A1
Authority
EP
European Patent Office
Prior art keywords
injection
line
orifice
steam
injection line
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.)
Withdrawn
Application number
EP11158049A
Other languages
German (de)
English (en)
Inventor
Arne Grassmann
Stephan Minuth
Kakhi Naskidashvili
Stefan Riemann
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
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 EP11158049A priority Critical patent/EP2500549A1/fr
Priority to PCT/EP2012/052192 priority patent/WO2012123194A1/fr
Priority to CN201280013635.4A priority patent/CN103443420B/zh
Priority to EP12704399.0A priority patent/EP2655834B1/fr
Publication of EP2500549A1 publication Critical patent/EP2500549A1/fr
Withdrawn legal-status Critical Current

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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
    • F01K9/04—Plants characterised by condensers arranged or modified to co-operate with the engines with dump valves to by-pass stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B01F25/31332—Ring, torus, toroidal or coiled configurations

Definitions

  • the invention relates to an injection orifice for mixing water and steam in a pipeline, wherein means for injecting water are provided in the injection orifice. Furthermore, the invention relates to a method for cooling a vapor, wherein the vapor flows through an injection orifice.
  • steam turbines are fluidly connected via comparatively complicated pipelines to a steam generator.
  • hot steam is generated, which is usually led to a high-pressure or medium-pressure turbine section.
  • the steam generated by the steam generator flows directly to the high-pressure or medium-pressure turbine section.
  • the steam must not necessarily flow directly to the turbine, but must be diverted to the condenser.
  • the condenser the steam is converted back into water.
  • diverter stations are used in these power plants described above, whose task is to direct the steam coming from the steam generator completely or partially directly into the condenser.
  • the bypass station is used in addition to the regular continuous operation during the so-called start-up or shutdown.
  • the steam is conducted via the bypass station to the condenser, the steam is passed via a diverter valve and a short pipe to an injection orifice. After flowing through the bypass valve, the short pipe and the injection orifice, the pressure of the steam decreases.
  • the steam is cooled to be controlled with the condenser to a tuned level.
  • the single-stage injection orifice is for a maximum injection quantity designed for water. Under unfavorable circumstances, this can lead to a poor mixing of the steam with the water in the partial load operation of the bypass station, when comparatively little cooling water is required. This could lead to erosion and temperature problems in the downstream condenser.
  • the invention begins, whose task is to provide a way to optimally adapt the steam parameters, especially to be able to adapt to load cases.
  • an injection orifice for mixing water and steam in a pipeline wherein a first injection line and a second injection line for injection of water into an injection orifice flow channel are formed in the orifice, wherein the injection orifice flow channel is defined by an injection port on the inside. Flow surface is formed on the injection orifice.
  • the object is achieved by a method for cooling a steam, wherein the steam flows through an injection orifice, wherein water is injected into the steam via a first injection line and a second injection line.
  • the invention is based on the idea that in addition to a singular injection known in the prior art, a dual injection with two injection lines leads to a better mixing of the water with the steam. This will improve the steam parameters to the level of the condenser Voted.
  • the injection via the first injection line and the second injection line takes place in two stages. This means that 0% - 60% of the injection takes place in the first injection line during a start-up process in which not the full amount of water is needed via a control. For example, in load dumps, etc., the second stage is additionally turned on so that the second stage represented by the second injection pipe realizes the remaining capacity of 60% -100%.
  • the modified and inventive injection orifice can not only inject sufficient cooling water mass flow at 100% load, but also ensure a part-load operation of Dampfumleitstation better mixing of the water with the steam.
  • the injection-side flow-through-flow surface of the injection orifice is designed as a Laval nozzle. This basically means that the flow cross-section first tapers and then increases. As a result, the pressure distribution in the injection orifice is optimized.
  • the injection orifice is substantially rotationally symmetrical to a rotational symmetry axis and the first injection line is arranged at an angle ⁇ 1 with respect to the injection orifice flow surface, wherein the second injection line is arranged at an angle ⁇ 2 with respect to the injection orifice flow surface, the angles ⁇ 1 and ⁇ 2 can assume values between 10 ° and 80 °.
  • Optimal mixing of the jet of steam with the water injection jet is possible if the two flow directions (of the jet of steam and of the water spray jet) are not arranged at an obtuse angle. It would be better to mix at an angle between 10 ° and 80 °. Further advantageous angles are in the range of 20 ° to 70 ° and between 30 ° and 60 °.
  • angles ⁇ 1 and ⁇ 2 are substantially identical.
  • the first injection line and the second injection line can be connected to a common injection line.
  • one valve can be used in the first injection line and in the second injection line.
  • a control valve shall be taken into account.
  • the first injection line and the second injection line are fluidically connected via a common injection line.
  • the second injection line is initially blocked via the valve, so that water can be injected only via the first injection line.
  • the second control valve is opened so that it is possible to let up to 100% of the water injection amount flow into the injection orifice, thereby enabling better mixing with the steam jet.
  • the FIG. 1 shows a view of an injection orifice 1 seen in a flow direction 2.
  • the flow direction 2 in this case shows perpendicular to the plane.
  • the injection orifice 1 is arranged within a pipeline 3, this pipeline 3 being arranged in a bypass station in a steam power plant or in a gas turbine power plant. Through this pipe 3 flows a vapor which has been generated in a steam generator.
  • the injection orifice 1 is formed substantially rotationally symmetrical to a rotational symmetry axis 4.
  • the injection orifice 1 has, within the pipeline 3, an injection orifice flow surface 5 which serves as what is shown in FIG FIG. 2 it can be seen, Laval nozzle is formed.
  • FIG. 12 shows a cross-sectional view of the injection orifice 1.
  • the injection orifice 1 is substantially characterized in that the injection orifice flow surface 5 is similar to a Laval nozzle.
  • the Laval nozzle in a first region 6 has a comparatively large flow cross-section.
  • the first region 6 is adjoined by a tapering region 7, in which the flow cross section is reduced.
  • a continuous region 8 adjoins, in which the flow channel is continuously expanded.
  • a first injection line 9 and a second injection line 10 are arranged.
  • the first region 6, the tapering region 7 and the continuous region 8 are viewed in the flow direction 2, arranged one behind the other.
  • the first injection pipe 9 is inclined at an angle ⁇ 1 which is located substantially opposite to the injection orifice flow surface 5.
  • the second injection line 10 is at an angle ⁇ 2 formed opposite to the inflow-flow surface 5.
  • the angle ⁇ 1 can assume values between 10 ° - 80 °, 20 ° - 70 °, 30 ° - 60 °.
  • the angle ⁇ 2 can assume values between 10 ° - 80 °, 20 ° - 70 ° and 30 ° - 60 °.
  • the angles ⁇ 1 and ⁇ 2 may be substantially identical.
  • the first injection line 9 opens into a first supply line 11.
  • the second injection line 10 opens into a second supply line 12.
  • In the first supply line 11, a control valve 13 is arranged.
  • a control valve 14 is arranged.
  • the first supply line 11 and the second supply line 12 open into a common injection line 15.
  • a measuring device 16 is arranged, which determines the flow rate.
  • control valve 14 is initially closed, so that no water is flowed into the steam jet via the second injection line 2. If a water capacity of 0% - 60% is required in the steam jet, the control valve 13 is opened, wherein a control regulates the flow rate in the first injection line 9 in the steam jet.
  • the control valve 14 is opened, so that a capacity of up to 100% in the steam jet is possible. Therefore, in the second injection pipe 10, the capacity of 60% - 100% is adopted.
  • first bore 17 in the injection orifice 1 is arranged between the first injection line 9 and the first supply line 11.
  • second bore 18 in the injection orifice 1 is arranged between the second injection line 10 and the second supply line 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles (AREA)
  • Control Of Turbines (AREA)
EP11158049A 2011-03-14 2011-03-14 Ecran d'injection pour une centrale à vapeur Withdrawn EP2500549A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11158049A EP2500549A1 (fr) 2011-03-14 2011-03-14 Ecran d'injection pour une centrale à vapeur
PCT/EP2012/052192 WO2012123194A1 (fr) 2011-03-14 2012-02-09 Orifice d'injection pour une centrale thermique à vapeur
CN201280013635.4A CN103443420B (zh) 2011-03-14 2012-02-09 用于混合水和蒸汽的喷射孔板以及冷却蒸汽的方法
EP12704399.0A EP2655834B1 (fr) 2011-03-14 2012-02-09 Orifice d'injection pour une centrale thermique à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11158049A EP2500549A1 (fr) 2011-03-14 2011-03-14 Ecran d'injection pour une centrale à vapeur

Publications (1)

Publication Number Publication Date
EP2500549A1 true EP2500549A1 (fr) 2012-09-19

Family

ID=44357958

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11158049A Withdrawn EP2500549A1 (fr) 2011-03-14 2011-03-14 Ecran d'injection pour une centrale à vapeur
EP12704399.0A Not-in-force EP2655834B1 (fr) 2011-03-14 2012-02-09 Orifice d'injection pour une centrale thermique à vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12704399.0A Not-in-force EP2655834B1 (fr) 2011-03-14 2012-02-09 Orifice d'injection pour une centrale thermique à vapeur

Country Status (3)

Country Link
EP (2) EP2500549A1 (fr)
CN (1) CN103443420B (fr)
WO (1) WO2012123194A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372125A (en) * 1980-12-22 1983-02-08 General Electric Company Turbine bypass desuperheater control system
JPS595811A (ja) * 1982-07-01 1984-01-12 Toshiba Corp 低圧タ−ビンバイパス装置
EP0108298A1 (fr) * 1982-11-02 1984-05-16 Siemens Aktiengesellschaft Condenseur de turbine avec au minimum un conduit de dérivation de vapeur entrant dans le dôme
WO2010034659A2 (fr) * 2008-09-24 2010-04-01 Siemens Aktiengesellschaft Centrale à vapeur pour produire de l'énergie électrique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86207574U (zh) * 1986-10-13 1987-08-19 长春市盐城科技开发咨询处 喷管式汽水混合加热器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372125A (en) * 1980-12-22 1983-02-08 General Electric Company Turbine bypass desuperheater control system
JPS595811A (ja) * 1982-07-01 1984-01-12 Toshiba Corp 低圧タ−ビンバイパス装置
EP0108298A1 (fr) * 1982-11-02 1984-05-16 Siemens Aktiengesellschaft Condenseur de turbine avec au minimum un conduit de dérivation de vapeur entrant dans le dôme
WO2010034659A2 (fr) * 2008-09-24 2010-04-01 Siemens Aktiengesellschaft Centrale à vapeur pour produire de l'énergie électrique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EMERSON PROCESS MANAGEMENT: "Turbine Bypass Condenser Dump Applications", INTERNET CITATION, 1 July 2002 (2002-07-01), pages 1 - 8, XP007909671, Retrieved from the Internet <URL:http://www.documentation.emersonprocess.com/groups/public/documents/bulletins/d102812x012.pdf> [retrieved on 20090903] *

Also Published As

Publication number Publication date
WO2012123194A1 (fr) 2012-09-20
EP2655834B1 (fr) 2015-10-28
EP2655834A1 (fr) 2013-10-30
CN103443420B (zh) 2016-05-18
CN103443420A (zh) 2013-12-11

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