EP2123865B1 - Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device - Google Patents
Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device Download PDFInfo
- Publication number
- EP2123865B1 EP2123865B1 EP08425366.5A EP08425366A EP2123865B1 EP 2123865 B1 EP2123865 B1 EP 2123865B1 EP 08425366 A EP08425366 A EP 08425366A EP 2123865 B1 EP2123865 B1 EP 2123865B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- operating fluid
- evolving
- flowrate
- plant
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 title claims description 140
- 238000002347 injection Methods 0.000 title claims description 32
- 239000007924 injection Substances 0.000 title claims description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 5
- 239000012895 dilution Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 3
- 229940095054 ammoniac Drugs 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000628 reference dose Toxicity 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point
-
- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/106—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler
Definitions
- the present invention relates to a device and a method for controlling the injection of an operating fluid in an evolving fluid of a plant for the production of electrical energy and to a plant for the production of electrical energy comprising said control device.
- the present invention relates to a device and to a method for controlling the injection of an operating fluid in an evolving fluid of a combined-cycle electrical energy production plant.
- Energy-production plants and in particular combined-cycle energy-production plants, usually comprise a device for controlling the injection of an operating fluid into the fluid evolving in the plant.
- the evolving fluid is initially water, then vapour, and finally condensate.
- the operating fluid is injected into the evolving fluid in different portions of the plant in order to protect from electrochemical corrosion and from the deposition of encrusting salts the circuit of the plant within which the evolving fluid flows.
- Known devices for controlling the injection of the operating fluid substantially comprise means for calculation of a flowrate of operating fluid to be injected, and means for driving at least one pump for injection of the operating fluid on the basis of the flowrate of operating fluid calculated.
- the calculation means are configured for calculating the flowrate of operating fluid to be injected on the basis of the difference between a value of a detected parameter of the evolving fluid modified by the operating fluid and a reference value set beforehand.
- Said control devices generally use a PID (proportional integral derivative) control mode, which requires identification of appropriate control constants.
- PID proportional integral derivative
- control constants are particularly problematical, in so far as it is very difficult to identify control constants such as to determine a control of the injection that is precise, stable, and fast.
- the choice of the control constants has repercussions on the stability of the control of the injection above all in emergency situations, such as, for example, pollution of the condensate, where it is necessary to intervene rapidly maintaining the stability of the control.
- An aim of the present invention is to provide a device for controlling the injection of an operating fluid that is free from the drawbacks highlighted of the known art.
- an aim of the invention is to provide a device for controlling the injection of an operating fluid that is reliable and simple to use.
- the present invention relates to a device for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy according to claim 1.
- the present invention moreover relates to a method for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy.
- the present invention relates to a method for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy according to claim 6.
- the present invention moreover relates to a plant for the production of electrical energy.
- the present invention relates to an electrical energy production plant according to claim 7.
- the plant 1 is a plant for the combined-cycle production of electrical energy and comprises a gas-turbine unit 2, a steam-turbine unit 3, two alternators 5, 6, respectively coupled to the gas-turbine unit 2 and to the steam-turbine unit 3 and connected to a distribution network (not illustrated), a steam generator 7, a condenser 8, an assembly for injection of a first operating fluid 10, an assembly for injection of a second operating fluid 11, and an operating fluid injection control device 12.
- the plant comprises a gas-turbine unit, a steam-turbine unit, and an alternator all set on one and the same axis.
- the exhaust fumes of the gas-turbine unit 2 are channelled along a duct 13 and provide a source of heat for the steam generator 7.
- the steam generator 7 comprises a high-pressure element 14, a medium-pressure element 15 and a low-pressure element 16, each of which comprises an economizer 17, a cylindrical body ("drum") 18, an evaporator 19 and a super-heater 20, operation of which is known and will not be discussed in detail.
- the economizers 17 of the high-pressure element 14 and of the medium-pressure element 15 receive water from the low-pressure drum 18 by means of a supply pump 21, whilst the economizer 17 of the low-pressure element 16 receives water from a collection tank of the condenser 8, by means of an extraction pump 22.
- the steam-turbine unit 3 comprises a high-pressure section 24, a medium-pressure section 25, and a low-pressure section 26 circulating within which is steam coming, respectively, from the high-pressure element 14, the medium-pressure element 15, and the low-pressure element 16.
- the steam turbine comprises the high-pressure section and a medium-low-pressure section.
- an evolving fluid flows, which is initially water supplied by the pump 21, becomes vapour (steam) within the steam generator 7, and is transformed into condensate after the expansion in the low-pressure section 26 of the steam-turbine unit 3.
- the injection assembly 10 of the first operating fluid comprises a tank 28 containing the first operating fluid, and an injection pump 32 for injecting the first operating fluid.
- the injection pump 32 injects the first operating fluid into the evolving fluid upstream of the supply pump 21 under the control of the control device 12 as will be described in detail hereinafter.
- the evolving fluid in this situation, is water coming from the low-pressure drum 18.
- the first operating fluid comprises a de-oxygenating fluid diluted in water, for example, an amine-based de-oxygenating organic fluid.
- the de-oxygenating fluid has a given concentration of active principle, commonly referred to as de-oxygenating power P deox .
- the assembly 11 for injection of the second operating fluid comprises a tank 35 containing the second operating fluid, and an injection pump 36 for injection of the second operating fluid.
- the injection pump 36 injects the second operating fluid into the evolving fluid downstream of the pump 22 for extraction of the condensate under the control of the control device 12 as will be described in greater detail hereinafter.
- the evolving fluid in this situation, is condensate coming from the condenser 8.
- the second operating fluid comprises an alkalinizing fluid diluted in water, for example an amine-based or ammoniac-based alkalinizing fluid, to maintain the pH of the evolving fluid in the limits set by the standards.
- an alkalinizing fluid diluted in water for example an amine-based or ammoniac-based alkalinizing fluid, to maintain the pH of the evolving fluid in the limits set by the standards.
- the alkalinizing fluid has a given concentration of alkalinizing agent C flop .
- the control device 12 comprises a calculation module 38 for calculating the flowrates Q 1 , Q 2 of operating fluid to be injected into the fluid evolving in the plant 1 and a driving module 39 for driving the injection pumps 32 and 36 on the basis of the calculated flowrates Q 1 , Q 2 of operating fluid.
- the calculation module 38 is configured for calculating the flowrate Q 1 of the first operating fluid to be injected into the evolving fluid upstream of the supply pump 21 on the basis of a detected parameter of the evolving fluid modified by the first operating fluid.
- the detected parameter of the evolving fluid modified by the first operating fluid is the concentration of oxygen C 1 in the evolving fluid detected in the portion of plant 1 into which the operating fluid is injected, in particular upstream of the supply pump 32.
- the calculation module 38 is configured for calculating the flowrate Q 1 of the first operating fluid to be injected according to a first mode when the concentration of oxygen C 1 is lower than a given threshold value C TS and according to a second mode when the concentration of oxygen C 1 is higher than said threshold value C TS .
- the threshold value C TS of the detected parameter of the evolving fluid modified by the first operating fluid defines the type of treatment that it is intended to adopt.
- the threshold value C TS is comprised between 4 and 6 ppb, preferably 5 ppb.
- the threshold value C TS is comprised between 19 and 20 ppb, preferably 20 ppb.
- the calculation module 38 calculates the flowrate Q 1 according to a formula independent of the concentration of oxygen C 1 in the first mode, whilst in the second mode adds to the independent term calculated in the first mode, a term depending upon the concentrations of oxygen C 1 .
- the calculation module 38 determines a zero value of the flowrate Q 1 in the first mode. In the second mode, i.e., only when the value of the concentration C 1 is higher than the threshold value C TS , the calculation module 38 calculates the flowrate Q 1 in accordance with Eq. (2) indicated above.
- the calculation module 38 is moreover configured for calculating the flowrate Q 2 of second operating fluid to be supplied downstream of the pump 22 for intake of the condensate on the basis of a detected parameter of the evolving fluid modified by the second operating fluid.
- said parameter is the pH of the evolving fluid detected in a portion of the plant in which the operating fluid is injected, in particular downstream of the suction pump 22.
- the calculation module 38 is configured for calculating the flowrate Q 2 of the second operating fluid to be injected according to a first mode when the pH of the evolving fluid downstream of the suction pump 22 is lower than a given threshold value pH TS and a second mode when the pH of the evolving fluid downstream of the suction pump 22 is higher than said threshold value pH TS .
- the threshold value pH TS is comprised between 9 and 10, in particular the threshold value pH TS is preferably 9.55 in the case where an amine-based operating fluid is used, whilst it is preferably 9.85 in the case where an ammoniac-based operating fluid will be used.
- the calculation module 38 calculates the flowrate Q 2 according to a formula depending upon the pH detected, whilst in the second mode the calculation module 38 calculates a zero flowrate Q 2 .
- the driving module 39 on the basis of the flowrates Q 1 , Q 2 of operating fluids calculated by the calculation module 38, sends to the injection pumps 32 and 36 respective driving signals Sp 1 Sp 2 designed to drive the stroke of the pump in such a way as to determine an injection of a flowrate of operating fluid equal to the flowrate calculated by the calculation module 38.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Turbines (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Description
- The present invention relates to a device and a method for controlling the injection of an operating fluid in an evolving fluid of a plant for the production of electrical energy and to a plant for the production of electrical energy comprising said control device. In particular, the present invention relates to a device and to a method for controlling the injection of an operating fluid in an evolving fluid of a combined-cycle electrical energy production plant.
- Energy-production plants, and in particular combined-cycle energy-production plants, usually comprise a device for controlling the injection of an operating fluid into the fluid evolving in the plant. In the case of the combined-cycle plant, the evolving fluid is initially water, then vapour, and finally condensate.
- The operating fluid is injected into the evolving fluid in different portions of the plant in order to protect from electrochemical corrosion and from the deposition of encrusting salts the circuit of the plant within which the evolving fluid flows.
- A plant of this type is disclosed in document
WO 2009/138216 . - Known devices for controlling the injection of the operating fluid substantially comprise means for calculation of a flowrate of operating fluid to be injected, and means for driving at least one pump for injection of the operating fluid on the basis of the flowrate of operating fluid calculated. In particular, the calculation means are configured for calculating the flowrate of operating fluid to be injected on the basis of the difference between a value of a detected parameter of the evolving fluid modified by the operating fluid and a reference value set beforehand.
- Said control devices generally use a PID (proportional integral derivative) control mode, which requires identification of appropriate control constants.
- However, the identification of the control constants is particularly problematical, in so far as it is very difficult to identify control constants such as to determine a control of the injection that is precise, stable, and fast. The choice of the control constants has repercussions on the stability of the control of the injection above all in emergency situations, such as, for example, pollution of the condensate, where it is necessary to intervene rapidly maintaining the stability of the control.
- Frequently, it is necessary to entrust control of the injection of the operating fluid to an operator, who, on the basis of the measurements of the detected parameter of the evolving fluid, regulates directly the pumps for injection of the operating fluid.
- An aim of the present invention is to provide a device for controlling the injection of an operating fluid that is free from the drawbacks highlighted of the known art. In particular, an aim of the invention is to provide a device for controlling the injection of an operating fluid that is reliable and simple to use.
- In accordance with said aims, the present invention relates to a device for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy according to claim 1.
- The present invention moreover relates to a method for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy. In accordance with said purposes, the present invention relates to a method for controlling the injection of at least one operating fluid in an evolving fluid of a plant for the production of electrical energy according to claim 6.
- The present invention moreover relates to a plant for the production of electrical energy. In accordance with said aims the present invention relates to an electrical energy production plant according to claim 7.
- Further characteristics and advantages of the present invention will be clear from the following description of a non-limiting example of embodiment thereof, with reference to the attached figure, which is a schematic representation of a plant for the production of energy according to the present invention.
- In Figure 1 designated by the reference number 1 is a plant for the production of energy. In the non-limiting example described and illustrated herein, the plant 1 is a plant for the combined-cycle production of electrical energy and comprises a gas-turbine unit 2, a steam-turbine unit 3, two
alternators 5, 6, respectively coupled to the gas-turbine unit 2 and to the steam-turbine unit 3 and connected to a distribution network (not illustrated), a steam generator 7, acondenser 8, an assembly for injection of afirst operating fluid 10, an assembly for injection of asecond operating fluid 11, and an operating fluidinjection control device 12. Alternatively, the plant comprises a gas-turbine unit, a steam-turbine unit, and an alternator all set on one and the same axis. - The exhaust fumes of the gas-turbine unit 2 are channelled along a
duct 13 and provide a source of heat for the steam generator 7. - The steam generator 7 comprises a high-pressure element 14, a medium-
pressure element 15 and a low-pressure element 16, each of which comprises an economizer 17, a cylindrical body ("drum") 18, anevaporator 19 and a super-heater 20, operation of which is known and will not be discussed in detail. - The economizers 17 of the high-pressure element 14 and of the medium-
pressure element 15 receive water from the low-pressure drum 18 by means of asupply pump 21, whilst the economizer 17 of the low-pressure element 16 receives water from a collection tank of thecondenser 8, by means of anextraction pump 22. - The steam-turbine unit 3 comprises a high-
pressure section 24, a medium-pressure section 25, and a low-pressure section 26 circulating within which is steam coming, respectively, from the high-pressure element 14, the medium-pressure element 15, and the low-pressure element 16. In a different embodiment (not illustrated) the steam turbine comprises the high-pressure section and a medium-low-pressure section. - Basically, within the plant 1 an evolving fluid flows, which is initially water supplied by the
pump 21, becomes vapour (steam) within the steam generator 7, and is transformed into condensate after the expansion in the low-pressure section 26 of the steam-turbine unit 3. - The
injection assembly 10 of the first operating fluid comprises atank 28 containing the first operating fluid, and aninjection pump 32 for injecting the first operating fluid. Theinjection pump 32 injects the first operating fluid into the evolving fluid upstream of thesupply pump 21 under the control of thecontrol device 12 as will be described in detail hereinafter. The evolving fluid, in this situation, is water coming from the low-pressure drum 18. - The first operating fluid comprises a de-oxygenating fluid diluted in water, for example, an amine-based de-oxygenating organic fluid.
- The de-oxygenating fluid has a given concentration of active principle, commonly referred to as de-oxygenating power Pdeox.
- The
assembly 11 for injection of the second operating fluid comprises atank 35 containing the second operating fluid, and aninjection pump 36 for injection of the second operating fluid. Theinjection pump 36 injects the second operating fluid into the evolving fluid downstream of thepump 22 for extraction of the condensate under the control of thecontrol device 12 as will be described in greater detail hereinafter. The evolving fluid, in this situation, is condensate coming from thecondenser 8. - The second operating fluid comprises an alkalinizing fluid diluted in water, for example an amine-based or ammoniac-based alkalinizing fluid, to maintain the pH of the evolving fluid in the limits set by the standards.
- The alkalinizing fluid has a given concentration of alkalinizing agent Cflop.
- The
control device 12 comprises acalculation module 38 for calculating the flowrates Q1 , Q2 of operating fluid to be injected into the fluid evolving in the plant 1 and adriving module 39 for driving theinjection pumps - The
calculation module 38 is configured for calculating the flowrate Q1 of the first operating fluid to be injected into the evolving fluid upstream of thesupply pump 21 on the basis of a detected parameter of the evolving fluid modified by the first operating fluid. In the example described and illustrated herein, the detected parameter of the evolving fluid modified by the first operating fluid is the concentration of oxygen C1 in the evolving fluid detected in the portion of plant 1 into which the operating fluid is injected, in particular upstream of thesupply pump 32. - In particular, the
calculation module 38 is configured for calculating the flowrate Q1 of the first operating fluid to be injected according to a first mode when the concentration of oxygen C1 is lower than a given threshold value CTS and according to a second mode when the concentration of oxygen C1 is higher than said threshold value CTS. - The threshold value CTS of the detected parameter of the evolving fluid modified by the first operating fluid defines the type of treatment that it is intended to adopt. In the case where it is intended to adopt a reducing type treatment, the threshold value CTS is comprised between 4 and 6 ppb, preferably 5 ppb. In the case where it is desired to adopt an oxidizing type treatment, the threshold value CTS is comprised between 19 and 20 ppb, preferably 20 ppb.
- In the case where the reducing treatment is chosen, the
calculation module 38 calculates the flowrate Q1 according to a formula independent of the concentration of oxygen C1 in the first mode, whilst in the second mode adds to the independent term calculated in the first mode, a term depending upon the concentrations of oxygen C1. -
- K1 is a conversion factor depending upon the measure units used;
- Qflev1 is the flowrate of evolving fluid upstream of the
supply pump 21; - Dflop is the dilution in water of the de-oxygenating fluid in the
tank 28; and - DoseRif is a reference dose of the operating fluid established beforehand and such as to maintain the concentration of oxygen C1 below the threshold value CTS.
-
- K1 and K2 are conversion factors depending upon the measure units used;
- Qflev1 is the flowrate of evolving fluid upstream of the
supply pump 21; - Dflop is the dilution in water of the de-oxygenating fluid in the
tank 28; - DoseRif is a reference dose of the operating fluid established beforehand and such as to maintain the concentration of oxygen C1 below the threshold value CTS;
- C1 is the concentration of oxygen detected upstream of the
supply pump 21; and - Pdeox is the de-oxygenating power of the de-oxygenating fluid.
- In the case where the oxidizing treatment is chosen, in the first mode, the
calculation module 38 determines a zero value of the flowrate Q1. In the second mode, i.e., only when the value of the concentration C1 is higher than the threshold value CTS, thecalculation module 38 calculates the flowrate Q1 in accordance with Eq. (2) indicated above. - The
calculation module 38 is moreover configured for calculating the flowrate Q2 of second operating fluid to be supplied downstream of thepump 22 for intake of the condensate on the basis of a detected parameter of the evolving fluid modified by the second operating fluid. In the example described and illustrated herein, said parameter is the pH of the evolving fluid detected in a portion of the plant in which the operating fluid is injected, in particular downstream of thesuction pump 22. - In particular, the
calculation module 38 is configured for calculating the flowrate Q2 of the second operating fluid to be injected according to a first mode when the pH of the evolving fluid downstream of thesuction pump 22 is lower than a given threshold value pHTS and a second mode when the pH of the evolving fluid downstream of thesuction pump 22 is higher than said threshold value pHTS. - The threshold value pHTS is comprised between 9 and 10, in particular the threshold value pHTS is preferably 9.55 in the case where an amine-based operating fluid is used, whilst it is preferably 9.85 in the case where an ammoniac-based operating fluid will be used.
- In the first mode, the
calculation module 38 calculates the flowrate Q2 according to a formula depending upon the pH detected, whilst in the second mode thecalculation module 38 calculates a zero flowrate Q2. In detail, the formula for calculation of the flowrate Q2 in the first mode is the following:
where: - PM is the molecular weight of the alkalinizing agent contained in the operating fluid;
- Qflev2 is the flowrate of evolving fluid downstream of the
extraction pump 22; - Cflop is the concentration of the alkalinizing agent in the second alkalinizing fluid;
- Dflop is the dilution in water of the alkalinizing fluid in the
tank 35; - pH is the value of the pH detected downstream of the
pump 22 for extraction of the condensate; - pHTS is the threshold value of the pH parameter detected.
- The driving
module 39, on the basis of the flowrates Q1 , Q2 of operating fluids calculated by thecalculation module 38, sends to the injection pumps 32 and 36 respective driving signals Sp1 Sp2 designed to drive the stroke of the pump in such a way as to determine an injection of a flowrate of operating fluid equal to the flowrate calculated by thecalculation module 38. - Finally, it is evident that modifications and variations may be made to the device, the method and the plant described herein without departing from the scope of the annexed claims.
Claims (7)
- A device for controlling the injection of at least one operating fluid in an evolving fluid of a plant (1) for the production of electrical energy comprising:calculation means (38) for calculating at least one flowrate (Q2) of operating fluid to be injected into the evolving fluid on the basis of a detected parameter (pH) of the evolving fluid modified by the operating fluid;the calculation means (38) are configured for calculating the flowrate (Q2) of operating fluid to be injected according to a first mode when the detected parameter (pH) is lower than a given threshold value (pHTS) and according to a second mode when the detected parameter (pH) is higher than said threshold value (pHTS) ;the operating fluid containing an alkalinizing fluid; the detected parameter of the evolving fluid modified by the operating fluid being the pH; in the first mode the calculation means (38) being configured for calculating a flowrate (Q2) of operating fluid as a function of the pH detected;the device (12) being characterized in that in the first mode the calculation means (38) are configured for calculating a flowrate (Q2) of operating fluid as follows:
where:PM is the molecular weight of the alkalinizing agent contained in the operating fluid;Qflev2 is the flowrate of evolving fluid in the portion of plant in which the operating fluid is injected;Cflop is the concentration of the alkalinizing agent in the alkalinizing fluid;Dflop is the dilution in water of the alkalinizing fluid;pH is the value of the pH detected in the portion of plant in which the operating fluid is injected; andpHTS is the threshold value of the pH parameter detected. - A device according to Claim 1, characterized by comprising driving means (39) for driving at least one operating fluid injection pump (36) on the basis of the calculated flowrate (Q2) of operating fluid.
- A device according to Claim 1, characterized in that the evolving fluid in which the operating fluid is injected is condensed vapour.
- A device according to Claim 1 or Claim 2, characterized in that the threshold value (pHTS) is comprised between 9 and 10.
- A device according to one of Claims 1 to 4, characterized in that in the second mode the calculation means (38) are configured for calculating a zero flowrate (Q2) of operating fluid.
- A method for controlling the injection of at least one operating fluid in an evolving fluid of a plant (1) for the production of electrical energy comprising the step of calculating at least one flowrate (Q2) of operating fluid to be injected into the evolving fluid on the basis of a detected parameter (pH) of the evolving fluid modified by the operating fluid; the flowrate (Q2) of operating fluid to be injected is calculated according to a first mode when the detected parameter (pH) is lower than a given threshold value (pHTS) and according to a second mode when the detected parameter (pH) is higher than said threshold value (pHTS); the operating fluid containing an alkalinizing fluid; the detected parameter of the evolving fluid modified by the operating fluid being the pH; in the first mode the calculation means (38) being configured for calculating a flowrate (Q2) of operating fluid as a function of the pH detected;
the method being characterized in that in the first mode the step of calculating at least one flowrate (Q2) of operating fluid comprises calculating the flowrate (Q2) of operating fluid as follows:
where:
PM is the molecular weight of the alkalinizing agent contained in the operating fluid;
Qflev2 is the flowrate of evolving fluid in the portion of plant in which the operating fluid is injected;
Cflop is the concentration of the alkalinizing agent in the alkalinizing fluid;
Dflop is the dilution in water of the alkalinizing fluid;
pH is the value of the pH detected in the portion of plant in which the operating fluid is injected; and
pHTS is the threshold value of the pH parameter detected. - An electrical energy production plant comprising at least one steam-turbine unit (3) within which an evolving fluid flows; the plant (1) being characterized by comprising a device for controlling (12) the injection of at least one operating fluid into the evolving fluid as claimed in any one of Claims 1 to 5.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08425366T PL2123865T3 (en) | 2008-05-22 | 2008-05-22 | Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device |
EP08425366.5A EP2123865B1 (en) | 2008-05-22 | 2008-05-22 | Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08425366.5A EP2123865B1 (en) | 2008-05-22 | 2008-05-22 | Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2123865A2 EP2123865A2 (en) | 2009-11-25 |
EP2123865A9 EP2123865A9 (en) | 2010-05-19 |
EP2123865A3 EP2123865A3 (en) | 2011-01-19 |
EP2123865B1 true EP2123865B1 (en) | 2013-11-06 |
Family
ID=41056881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08425366.5A Active EP2123865B1 (en) | 2008-05-22 | 2008-05-22 | Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2123865B1 (en) |
PL (1) | PL2123865T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015129618A1 (en) * | 2014-02-28 | 2015-09-03 | 栗田工業株式会社 | Method and device for controlling charging of chemical into boiler |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19544224B4 (en) * | 1995-11-28 | 2004-10-14 | Alstom | Chemical operation of a water / steam cycle |
DE19736885A1 (en) * | 1997-08-25 | 1999-03-04 | Siemens Ag | Steam generator, in particular waste heat steam generator and method for operating this steam generator |
DE102008023263A1 (en) * | 2008-05-13 | 2009-11-19 | Hitachi Power Europe Gmbh | Chemical water / steam cycle conditioning |
-
2008
- 2008-05-22 EP EP08425366.5A patent/EP2123865B1/en active Active
- 2008-05-22 PL PL08425366T patent/PL2123865T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP2123865A3 (en) | 2011-01-19 |
EP2123865A9 (en) | 2010-05-19 |
EP2123865A2 (en) | 2009-11-25 |
PL2123865T3 (en) | 2014-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4918517B2 (en) | Turbine equipment water quality monitoring method | |
JP7060996B2 (en) | Combustion equipment, gas turbines and power generation equipment | |
JP2008057888A (en) | Water treatment method for steam plant | |
CN101969202A (en) | Method for recognizing transmission section power limit interval of power system transient stability | |
CN102347613A (en) | Method for automatically selecting on-line strategy and off-line strategy of transient security and stability emergency control of electrical power system | |
CN112240232A (en) | Steam power plant, method for modifying steam power plant, and method for operating steam power plant | |
CN102691538B (en) | Power generation arrangement and controlling method thereof | |
WO2009109311A2 (en) | Method for obtaining energy from an exhaust flow and motor vehicle | |
CN105527113B (en) | A kind of nuclear power station heat energy efficiency monitoring and fault diagnosis system and method | |
EP2123865B1 (en) | Device and method for controlling the injection of an operating fluid and plant for the production of electrical energy comprising said control device | |
US10760453B2 (en) | Feedwater system of combined cycle power plant | |
CN204939171U (en) | A kind of portable nuclear desalination system | |
CN106097151A (en) | A kind of method reducing power plant's data uncertainty based on data harmonization | |
JP5783458B2 (en) | Increased output operation method in steam power plant | |
ATE551570T1 (en) | CHEMICAL WATER-STEAM CYCLE CONDITIONING | |
ZA202109369B (en) | System and method to improve boiler and steam turbine start-up times | |
NO994893L (en) | Wind Machine | |
CN103401496B (en) | Continuous adjustable control method for power generating quantity of low-temperature power generator set | |
WO2015090648A1 (en) | Sensorless condenser regulation for power optimization for orc systems | |
EP2594764A1 (en) | Steam turbine facility, and method for operating the same | |
JP5142817B2 (en) | Operation method of condensate system in steam power plant | |
CN112818516A (en) | Drainage optimization method for regenerative system of full-high-position steam turbine generator unit | |
CN106961100B (en) | New energy is transported to transmission system facility | |
WO2009109659A2 (en) | Method and device for controlling a combined-cycle plant, and combined-cycle plant | |
CN106997213A (en) | A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
RTI1 | Title (correction) |
Free format text: DEVICE AND METHOD FOR CONTROLLING THE INJECTION OF AN OPERATING FLUID AND PLANT FOR THE PRODUCTION OF ELECTRICAL ENERGY COMPRISING SAID CONTROL DEVICE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F01K 23/10 20060101ALI20101215BHEP Ipc: F22B 37/02 20060101AFI20101215BHEP |
|
17P | Request for examination filed |
Effective date: 20110719 |
|
AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 602008028530 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: F01K0021060000 Ipc: F22B0037020000 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F22B 37/02 20060101AFI20130423BHEP Ipc: F01K 23/10 20060101ALI20130423BHEP |
|
INTG | Intention to grant announced |
Effective date: 20130517 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 639754 Country of ref document: AT Kind code of ref document: T Effective date: 20131215 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602008028530 Country of ref document: DE Effective date: 20140102 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20131106 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 639754 Country of ref document: AT Kind code of ref document: T Effective date: 20131106 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140306 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140206 |
|
REG | Reference to a national code |
Ref country code: PL Ref legal event code: T3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140306 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602008028530 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
26N | No opposition filed |
Effective date: 20140807 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602008028530 Country of ref document: DE Effective date: 20140807 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602008028530 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140522 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20140522 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140531 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140531 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20150130 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602008028530 Country of ref document: DE Effective date: 20141202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140522 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140522 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140602 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20150513 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PL Payment date: 20150415 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131106 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140207 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20080522 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160522 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160522 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20231124 Year of fee payment: 16 |