WO2012123194A1 - Orifice d'injection pour une centrale thermique à vapeur - Google Patents

Orifice d'injection pour une centrale thermique à vapeur Download PDF

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Publication number
WO2012123194A1
WO2012123194A1 PCT/EP2012/052192 EP2012052192W WO2012123194A1 WO 2012123194 A1 WO2012123194 A1 WO 2012123194A1 EP 2012052192 W EP2012052192 W EP 2012052192W WO 2012123194 A1 WO2012123194 A1 WO 2012123194A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
line
injection line
orifice
steam
Prior art date
Application number
PCT/EP2012/052192
Other languages
German (de)
English (en)
Inventor
Arne Grassmann
Stephan Minuth
Kakhi Naskidashvili
Stefan Riemann
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP12704399.0A priority Critical patent/EP2655834B1/fr
Priority to CN201280013635.4A priority patent/CN103443420B/zh
Publication of WO2012123194A1 publication Critical patent/WO2012123194A1/fr

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
    • F01K9/04—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.
  • 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 designed for maximum sprayed amount of water. This can lead to the partial load operation of Umleitsta ⁇ tion when relatively little cooling water is needed, it comes to poor mixing of the steam with the water under unfavorable circumstances. 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 formed by an inside Einspritzblen ⁇ the flow surface is formed on the injection orifice and the second injection line is arranged in the flow direction after the first injection line.
  • 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 to a particular mixing the water with the steam.
  • the steam parameters are better adapted to the level of Kondensa ⁇ tors.
  • the injection via the first injection line and the second injection line takes place in two stages. This means that during a starting, in which not the full amount of water is required in the first injection line ⁇ A 0% - 60% of the injection takes place via a control. For example, load shedding, etc., the second stage is also turned on, so that the second stage, which is represented by the second injection line, the remaining ⁇ Liche capacity of 60% - 100% is realized.
  • 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 port flow-side surface of the injection port is formed 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 essentially rotationally symmetrical with respect to one
  • Rotational axis of symmetry formed and arranged the first injection ⁇ line at an angle al opposite the injection orifice flow surface, wherein the second injection line is disposed at an angle a2 with respect to the injection orifice flow surface, wherein the angles al and a2 can assume values between 10 ° and 80 ° .
  • Optimum mixing of the steam jet with the water injection jet is possible if the two flow directions (of the steam flow) Jet and the water injection jet) are not arranged at an obtuse angle. Better would be a Naturalmi ⁇ Schung at an angle between 10 ° and 80 °. Further advantageous angles are in the range of 20 ° to 70 ° and between 30 ° and 60 °.
  • the angles od and a2 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 second injection line which is used for the capacity of 60% to 100%, a control valve is sufficient.
  • 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 the possibility ⁇ is be to let hineinströmen up to 100% of the quantity of water injection into the injection aperture, thereby to enable a better mixing with the steam jet.
  • FIG. 1 shows a plan view in the flow direction on an injection screen
  • Figure 2 is a cross-sectional view of the injection orifice.
  • FIG. 1 shows a view of an injection orifice 1 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 injector panel 1 has within the tubular ⁇ line 3 to an injection aperture flow surface 5, the Laval nozzle is formed as what is seen in FIG. 2
  • the injection ⁇ iris diaphragm 1 is substantially characterized in that the injection aperture flow surface 5 resembling a Laval nozzle. This means that in the flow direction 2, the Laval nozzle in a first region 6 has a comparatively large flow cross-section. The first region 6 is adjoined by a mixing region 7, in which the flow cross-section is reduced.
  • Rejuvenation region 7 is followed by a continuous region 8, in which the flow channel is continuously expanded.
  • a first injection line 9 and a second injection line 10 are arranged in the continuous region 8, 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 line 9 is inclined at an angle .alpha. is disposed above the injection orifice flow surface 5.
  • the second injection pipe 10 is formed at an angle c ⁇ 2 with respect to the inflow-flow surface 5.
  • the angle oii can assume values between 10 ° - 80 °, 20 ° - 70 °, 30 ° - 60 °.
  • the angle c ⁇ 2 can assume values between 10 ° - 80 °, 20 ° - 70 ° and 30 ° - 60 °. In particular, the angles oii and c ⁇ 2 may be substantially identical.
  • the first injection line 9 opens into a first feed line 11.
  • the second injection line 10 opens into a second feed line 12.
  • a control valve 13 is arranged in the first feed line 11.
  • In the second supply line 12 is 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.
  • the second injection line 10 is arranged in the flow direction 2 after the first injection line 9.
  • the 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 into 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.
  • a first bore 17 is arranged in the injection orifice 1.
  • a second bore 18 in the injection orifice 1 is arranged.

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)

Abstract

L'invention concerne un orifice d'injection (1) destiné à mélanger de l'eau et de la vapeur dans une première conduite (3), plusieurs conduites d'injection (9, 10), en particulier deux conduites d'injection (9, 10), étant prises en considération au lieu d'une seule conduite d'injection.
PCT/EP2012/052192 2011-03-14 2012-02-09 Orifice d'injection pour une centrale thermique à vapeur WO2012123194A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12704399.0A EP2655834B1 (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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11158049.4 2011-03-14
EP11158049A EP2500549A1 (fr) 2011-03-14 2011-03-14 Ecran d'injection pour une centrale à vapeur

Publications (1)

Publication Number Publication Date
WO2012123194A1 true WO2012123194A1 (fr) 2012-09-20

Family

ID=44357958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/052192 WO2012123194A1 (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 (3)

* 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
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595811A (ja) * 1982-07-01 1984-01-12 Toshiba Corp 低圧タ−ビンバイパス装置
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 (3)

* 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
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
EP2655834A1 (fr) 2013-10-30
CN103443420A (zh) 2013-12-11
EP2500549A1 (fr) 2012-09-19
EP2655834B1 (fr) 2015-10-28
CN103443420B (zh) 2016-05-18

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