EP3324009A1 - Steam turbine plant - Google Patents
Steam turbine plant Download PDFInfo
- Publication number
- EP3324009A1 EP3324009A1 EP16836947.8A EP16836947A EP3324009A1 EP 3324009 A1 EP3324009 A1 EP 3324009A1 EP 16836947 A EP16836947 A EP 16836947A EP 3324009 A1 EP3324009 A1 EP 3324009A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- low pressure
- steam
- turbine
- disposed
- pressure turbine
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 61
- 239000000498 cooling water Substances 0.000 description 12
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F01K7/223—Inter-stage moisture separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
Definitions
- the present invention relates to a steam turbine plant used for nuclear power plants, thermal power plants, and the like.
- a nuclear power plant sends steam generated by a steam generator to a steam turbine, and drives a connected generator to generate electricity.
- a steam turbine includes a high pressure turbine and a low pressure turbine, and steam used in the high pressure turbine is sent to the low pressure turbine after the moisture is removed by a moisture separating heater and the steam is heated.
- the steam used in the steam turbine is cooled by a condenser to become condensate, and the condensate is returned to the steam generator after being heated by a low pressure feed water heater, a high pressure feed water heater or the like.
- a steam turbine high pressure turbine, intermediate pressure turbine, and low pressure turbine
- generator high pressure moisture separating heater, low pressure moisture separating heater, and the like
- Patent Literature 1 An example of such a steam turbine plant is described in the following Patent Literature 1.
- Patent Literature 1 JP S62-218606 A
- An object of the present invention is to solve the above-mentioned problem, and to provide a steam turbine plant that achieves simplification of the structure and reduction of equipment cost.
- a steam turbine plant comprising: a high and intermediate pressure turbine having a high pressure turbine unit at one end in an axial direction and an intermediate pressure turbine unit at the other end; at least one low pressure turbine disposed coaxially with the high and intermediate pressure turbine; at least one high pressure moisture separator arranged to remove moisture from steam from the high pressure turbine unit and send the steam to the intermediate pressure turbine unit; and at least one low pressure moisture separator arranged to remove the moisture from the steam from the intermediate pressure turbine unit and send the steam to the at least one low pressure turbine, wherein the at least one high pressure moisture separator and the at least one low pressure moisture separator are each disposed symmetrically with respect to a center line along the axial direction of the high and intermediate pressure turbine.
- the high pressure moisture separator and the low pressure moisture separator each symmetrically with respect to the center line of the high and intermediate pressure turbine, the high pressure moisture separator can be disposed in the vicinity of the high and intermediate pressure turbine or the low pressure turbine.
- a pipe length is shortened, the structure can be simplified, the equipment cost can be reduced, and the turbine building can also be downsized.
- the steam turbine plant comprises the two high pressure moisture separators and the two low pressure moisture separators, wherein the two high pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, and the two high pressure moisture separators and the two low pressure moisture separators are disposed in series along the axial direction.
- the at least one high pressure moisture separator is disposed on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the at least one low pressure moisture separator is disposed on a low pressure turbine side in the axial direction of the high and intermediate pressure turbine.
- the high pressure moisture separator is disposed in the vicinity of the high and intermediate pressure turbine, and the low pressure moisture separator is disposed in the vicinity of the low pressure turbine.
- the steam turbine plant comprises the one high pressure moisture separator and the two low pressure moisture separators, wherein the one high pressure moisture separator is disposed along the center line on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine.
- the at least one high pressure moisture separator is disposed along a direction intersecting the axial direction.
- the high pressure moisture separator in a direction intersecting the high and intermediate pressure turbine and the low pressure turbine, the space in the axial direction can be effectively utilized, thereby downsizing the turbine building.
- the at least one high pressure moisture separator and the at least one low pressure moisture separator are disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor.
- the at least one high pressure moisture separator is disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor, and the at least one low pressure moisture separator is disposed on another floor of the first floor and the second floor.
- the at least one high pressure moisture separator is a high pressure moisture separating heater.
- thermal efficiency of the turbine plant can be further improved.
- the high pressure moisture separator and the low pressure moisture separator are each disposed symmetrically with respect to the center line along the axial direction of the high and intermediate pressure turbine, the structure can be simplified, and the equipment cost can be reduced.
- FIG. 1 is a schematic configuration diagram showing a nuclear power plant according to a first embodiment.
- a nuclear reactor of the first embodiment is a pressurized water reactor (PWR) that uses light water as nuclear reactor coolant and neutron moderator, produces high temperature and high pressure water without boiling over the whole reactor core, sends this high temperature and high pressure water to the steam generator to generate steam by heat exchange, and sends this steam to a turbine generator to generate electricity.
- PWR pressurized water reactor
- a reactor containment 11 has a pressurized water reactor 12 and a steam generator 13 therein, and the pressurized water reactor 12 and the steam generator 13 are connected via pipes 14, 15.
- a pressurizer 16 is provided in the pipe 14, and a primary cooling water pump 17 is provided in the pipe 15.
- light water is used as moderator and primary cooling water (coolant).
- a primary cooling system is controlled by the pressurizer 16 so as to maintain a high pressure state of about 150 to 160 atm.
- the light water is heated as primary cooling water by low enriched uranium or MOX as fuel (nuclear fuel), and the high temperature primary cooling water is sent to the steam generator 13 through the pipe 14 while being maintained at a predetermined high pressure by the pressurizer 16.
- heat exchange is performed between the high temperature and high pressure primary cooling water and secondary cooling water, and the cooled primary cooling water is returned to the pressurized water reactor 12 through the pipe 15.
- the steam generator 13 is connected to a steam turbine 19 via a pipe 18, and a main steam isolation valve 20 is provided in the pipe 18.
- the steam turbine 19 has a high and intermediate pressure turbine 21 and two low pressure turbines 22 and 23, and a generator 24 is connected coaxially.
- the high and intermediate pressure turbine 21 has a high pressure turbine unit 25 and an intermediate pressure turbine unit 26, and a high pressure moisture separating heater 27 is provided between the high pressure turbine unit 25 and the intermediate pressure turbine unit 26. Furthermore, a low pressure moisture separating heater 28 is provided between the high and intermediate pressure turbine 21 (intermediate pressure turbine unit 26) and the low pressure turbines 22 and 23.
- the pipe 18 from the steam generator 13 is connected to an inlet portion of the high pressure turbine unit 25, a steam pipe 29 is connected from an outlet portion of the high pressure turbine unit 25 to the inlet portion of the high pressure moisture separating heater 27, and a steam pipe 30 is connected from an outlet portion of the high pressure moisture separating heater 27 to an inlet portion of the intermediate pressure turbine unit 26. Furthermore, a steam pipe 31 is connected from an outlet portion of the intermediate pressure turbine unit 26 to an inlet portion of the low pressure moisture separating heater 28, and a steam pipe 32 is connected from an outlet portion of the low pressure moisture separating heater 28 to respective inlet portions of the low pressure turbines 22 and 23.
- condensers 33 and 34 are provided below the low pressure turbines 22 and 23.
- the condensers 33 and 34 cool steam used in the low pressure turbines 22 and 23 with cooling water and condense the steam to make condensate.
- Seawater is used as the cooling water, and the condensers 33 and 34 are connected to an intake pipe 35 and a drain pipe 36 for supplying and discharging the cooling water.
- the intake pipe 35 has a circulating water pump 37, and one end portion thereof is disposed in the sea together with the drain pipe 36.
- a pipe 38 is connected to the condensers 33 and 34, and a condensate pump 39, a gland condenser 40, a condensate demineralizer 41, a condensate booster pump 42, and low pressure feed water heaters 43, 44, 45, and 46 are provided in this pipe 38 in order along the flow direction of the condensate.
- the first low pressure feed water heater 43 and the second low pressure feed water heater 44 are provided in the condensers 33 and 34, and the condensate is heated by the steam used in the low pressure turbines 22 and 23.
- the third low pressure feed water heater 45 and the fourth low pressure feed water heater 46 are provided outside the condensers 33 and 34. In the third low pressure feed water heater 45, the condensate is heated by the steam extracted from the low pressure turbines 22 and 23, and in the fourth low pressure feed water heater 46, the condensate is heated by the steam exhausted from the intermediate pressure turbine unit 26.
- the pipe 38 is provided with a deaerator 47, a main feed water pump 48, a high pressure feed water heater 49, and a main feed water control valve 50 in this order along the flow direction of the condensate.
- the steam generated by performing the heat exchange with the high temperature and high pressure primary cooling water in the steam generator 13 is sent to the steam turbine 19 through the pipe 18, the high and intermediate pressure turbine 21 and each of the low pressure turbines 22 and 23 are operated to obtain rotational force, and the generator 24 is driven by this rotational force to generate electricity.
- the steam from the steam generator 13 drives the high pressure turbine unit 25
- the moisture contained in the steam is removed by the high pressure moisture separating heater 27, and the steam is heated to drive the intermediate pressure turbine unit 26.
- the steam that has driven the intermediate pressure turbine unit 26 drives the low pressure turbines 22 and 23 after the moisture contained in the steam is removed by the low pressure moisture separating heater 28 and the steam is heated.
- the steam that has driven the low pressure turbines 22 and 23 is cooled by the seawater in the condensers 33, 34 to become condensate, flows through the pipe 38 by the condensate pump 39, and is returned through the gland condenser 40, the condensate demineralizer 41, the low pressure feed water heaters 43, 44, 45, and 46, the deaerator 47, the high pressure feed water heater 49, and the like to the steam generator 13.
- FIG. 2 is a schematic diagram showing the flow of the condensate and the steam in a steam turbine plant of the first embodiment.
- the steam pipe 31 from the outlet portion of the intermediate pressure turbine unit 26 to the inlet portion of the low pressure moisture separating heater 28 is connected to a base end portion of a steam branch pipe 51 branched from a middle portion of the steam pipe 31, and a distal end portion of the steam branch pipe 51 is connected to the fourth low pressure feed water heater 46.
- a distal end portion of a bleed air pipe 52 from the low pressure turbines 22 and 23 is connected to the third low pressure feed water heater 45. Therefore, the third low pressure feed water heater 45 heats the condensate with the steam extracted from the low pressure turbines 22 and 23, and the fourth low pressure feed water heater 46 heats the condensate with the steam exhausted from the intermediate pressure turbine unit 26.
- drain water
- a drain pipe 53 is connected from the fourth low pressure feed water heater 46 to the third low pressure feed water heater 45
- a drain pipe 54 is connected from the third low pressure feed water heater 45 to the second low pressure feed water heater 44
- a drain pipe 55 is connected from the second low pressure feed water heater 44 to the first low pressure feed water heater 43.
- a drain pipe 56 is connected from the first low pressure feed water heater 43 to a portion in the pipe 38 between the first low pressure feed water heater 43 and the second low pressure feed water heater 44, and a drain pump 57 is provided in the drain pipe 56.
- the high pressure moisture separating heater 27, the low pressure moisture separating heater 28, and the like are disposed efficiently in the limited space with respect to the steam turbine 19.
- FIG. 3 is a plan view showing an arrangement of the steam turbine plant of the first embodiment
- FIG. 4 is a front view showing an arrangement of the steam turbine plant.
- the steam turbine plant of the first embodiment includes the high and intermediate pressure turbine 21, the low pressure turbines 22 and 23, the generator 24, the high pressure moisture separating heater 27 (27a and 27b), and the low pressure moisture separating heater 28 (28a and 28b).
- a turbine building (not shown) includes a plurality of floors.
- a foundation 62 is laid at a center of a predetermined floor (first floor) 61, and on the foundation 62, the high and intermediate pressure turbine 21, the two low pressure turbines 22 and 23, and the generator 24 are installed coaxially along the axial direction C.
- the low pressure moisture separating heater 28 includes two low pressure moisture separating heaters 28a and 28b, and they are disposed on the floor 61 so as to be positioned on both sides of the high and intermediate pressure turbine 21 in a width direction (vertical direction in FIG. 3 ).
- Each of the low pressure moisture separating heaters 28a and 28b is disposed at a predetermined distance from the high and intermediate pressure turbine 21 and each of the low pressure turbines 22, 23, and is arranged parallel to the axial direction C.
- Each of the low pressure moisture separating heaters 28a and 28b removes the moisture from the steam exhausted from the high and intermediate pressure turbine 21 and sends the steam to the low pressure turbines 22 and 23.
- Two steam pipes 31a and 31b extend from the outlet portion of the intermediate pressure turbine unit 26 (see FIG.
- each of the low pressure moisture separating heaters 28a and 28b is provided with a group of heat transfer tubes as heating sources for heating the steam, in which the steam from the steam generator 13 circulates.
- the high pressure moisture separating heater 27 includes two high pressure moisture separating heaters 27a and 27b, and they are disposed on the floor 61 so as to be positioned on both sides of the high and intermediate pressure turbine 21 in the width direction (vertical direction in FIG. 3 ).
- Each of the high pressure moisture separating heaters 27a and 27b removes the moisture from the steam exhausted from the high pressure turbine unit 25 and sends the steam to the intermediate pressure turbine unit 26.
- Steam pipes 29a and 29b extend from the outlet portion of the high pressure turbine unit 25 (see FIG. 2 ), and distal end portions thereof are respectively connected to the inlet portions of the high pressure moisture separating heaters 27a and 27b.
- Steam pipes 30a and 30b are connected to the inlet portion of the intermediate pressure turbine unit 26 from the outlet portions of the high pressure moisture separating heaters 27a and 27b.
- each of the high pressure moisture separating heaters 27a and 27b is provided with a group of heat transfer tubes as heating sources for heating the steam, in which the steam from the steam generator 13 circulates.
- the high and intermediate pressure turbine 21, the low pressure turbines 22 and 23, the generator 24, the high pressure moisture separating heater 27 (27a and 27b), and the low pressure moisture separating heater 28 (28a and 28b) are disposed on the same floor 61.
- the high pressure moisture separating heaters 27a and 27b and the low pressure moisture separating heaters 28a and 28b are disposed on both sides in a horizontal direction orthogonal to the axial direction C of the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23, symmetrically with respect to the center line along the axial direction C.
- the two high pressure moisture separating heaters 27a and 27b are disposed on both sides of the high and intermediate pressure turbine 21 in parallel with the axial direction C.
- the two low pressure moisture separating heaters 28a and 28b are disposed on both sides of the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23 in parallel with the axial direction C.
- the high pressure moisture separating heaters 27a and 27b are disposed on a side opposite to the low pressure turbines 22 and 23 in the axial direction C of the high and intermediate pressure turbine 21, and the low pressure moisture separating heaters 28a and 28b are disposed on a side of the low pressure turbines 22 and 23 in the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heaters 27a and 27b and the low pressure moisture separating heaters 28a and 28b are disposed in series along the axial direction C.
- the deaerator 47 (see FIG. 2 ) is disposed on the floor 61 on one side in the axial direction C of the high and intermediate pressure turbine 21, along a direction intersecting the axial direction C of the high and intermediate pressure turbine 21.
- the deaerator 47 removes impurities such as dissolved oxygen and uncondensed gas (ammonia gas) in the condensate (feed water) from the fourth low pressure feed water heater 46 (see FIG. 2 ).
- the high pressure moisture separating heaters 27a and 27b are disposed between the high and intermediate pressure turbine 21 and the deaerator 47.
- FIG. 5 and FIG. 6 are front views each showing another arrangement of the steam turbine plant.
- a floor (second floor) 63 is provided below the floor 61.
- the high pressure moisture separating heaters 27a (27b) are disposed on the lower floor 63 different from the floor 61 on which the high and intermediate pressure turbine 21, the low pressure turbines 22 and 23, the low pressure moisture separating heater 28 (28a and 28b), and the like are installed.
- the high pressure moisture separating heaters 27a (27b) are disposed on both sides in the horizontal direction orthogonal to the axial direction C, symmetrically with respect to the center line along the axial direction C so as to be parallel with the axial direction C.
- the deaerator 47 is disposed on the floor 61 on one side in the axial direction C of the high and intermediate pressure turbine 21, along a direction intersecting the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heaters 27a (27b) and the low pressure moisture separating heaters 28a (28b) are disposed on the lower floor 63 different from the floor 61 on which the high and intermediate pressure turbine 21, the low pressure turbines 22 and 23, and the like are installed.
- the high pressure moisture separating heaters 27a (27b) and the low pressure moisture separating heaters 28a (28b) are disposed on both sides in the horizontal direction orthogonal to the axial direction C, symmetrically with respect to the center line along the axial direction C so as to be parallel with the axial direction C.
- the high pressure moisture separating heaters 27a may be disposed on the floor 61 on which the high and intermediate pressure turbine 21, the low pressure turbines 22 and 23, and the like are installed, and the low pressure moisture separating heaters 28a (28b) may be disposed on the lower floor 63.
- the two high pressure moisture separating heaters 27 (27a and 27b) and the two low pressure moisture separating heaters 28 (28a and 28b) are symmetrically disposed with respect to the center line along the axial direction C of the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23.
- the high pressure moisture separating heater 27 can be disposed efficiently in the vicinity of the high and intermediate pressure turbine 21, and there is no need to expand the turbine building in a width direction (a horizontal direction orthogonal to the axial direction C) of the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23.
- the pipe lengths of the steam pipes 29 and 31 are shortened, the overall structure is simplified. Furthermore, since the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 are each disposed symmetrically, the flow rate of the steam is balanced well, and performance of the entire plant is improved.
- the steam sent from the steam generator 13 through the pipe 18 drives the high pressure turbine unit 25 of the high and intermediate pressure turbine 21, and is then sent by the steam pipe 29 to the high pressure moisture separating heater 27, where the steam is heated while moisture is removed.
- the steam processed by the high pressure moisture separating heater 27 drives the intermediate pressure turbine unit 26, and is then sent by the steam pipe 30 to the low pressure moisture separating heater 28, where the steam is heated while moisture is removed.
- the steam processed by the low pressure moisture separating heater 28 is sent to the low pressure turbines 22 and 23 by the steam pipe 32 to drive the low pressure turbines 22 and 23.
- the steam exhausted from the intermediate pressure turbine unit 26 is sent to the low pressure moisture separating heater 28 by the steam pipe 31 (31a and 31b) and is also sent to the fourth low pressure feed water heater 46 by the steam branch pipe 51.
- the steam extracted from the low pressure turbines 22 and 23 is sent to the third low pressure feed water heater 45 through the bleed air pipe 52. Therefore, the third low pressure feed water heater 45 heats the condensate (feed water) flowing through the pipe 38 by the steam from the low pressure turbines 22 and 23, and the fourth low pressure feed water heater 46 heats the condensate (feed water) heated by the third low pressure feed water heater 45 and flowing through the pipe 38 by the steam from the intermediate pressure turbine unit 26.
- the steam turbine plant of the first embodiment is provided with: the high and intermediate pressure turbine 21 having the high pressure turbine unit 25 at one end in the axial direction C and the intermediate pressure turbine unit 26 at the other end; the low pressure turbines 22 and 23 disposed coaxially with the high and intermediate pressure turbine 21; the high pressure moisture separating heater 27 (27a and 27b) that removes the moisture from the steam from the high pressure turbine unit 25 and sends the steam to the intermediate pressure turbine unit 26; and the low pressure moisture separating heater 28 (28a and 28b) that removes the moisture from the steam from the intermediate pressure turbine unit 26 and sends the steam to the low pressure turbines 22 and 23.
- the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 are each disposed symmetrically with respect to the center line along the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heater 27 can be disposed in the vicinity of the high and intermediate pressure turbine 21 or the low pressure turbines 22 and 23.
- the pipe length is shortened, the structure can be simplified, the equipment cost can be reduced, and the turbine building can also be downsized.
- the two high pressure moisture separating heaters 27a and 27b are disposed respectively on both sides of the high and intermediate pressure turbine 21, and the two low pressure moisture separating heaters 28a and 28b are disposed respectively on both sides of the high and intermediate pressure turbine 21, with the high pressure moisture separating heaters 27a and 27b and the low pressure moisture separating heaters 28a and 28b disposed in series along the axial direction C. Therefore, it is possible to effectively utilize space in the longitudinal direction of the high pressure moisture separating heaters 27a and 27b and the low pressure moisture separating heaters 28a and 28b.
- the high pressure moisture separating heater 27 is disposed on the side opposite to the low pressure turbines 22 and 23 in the axial direction C of the high and intermediate pressure turbine 21, and the low pressure moisture separating heater 28 is disposed on the side of the low pressure turbines 22 and 23 in the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heater 27 is disposed in the vicinity of the high and intermediate pressure turbine 21 and the low pressure moisture separating heater 28 is disposed in the vicinity of the low pressure turbines 22 and 23, whereby the pipe length is shortened, the structure can be simplified, and the equipment cost can be reduced.
- the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 are disposed on one of the floor 61 on which the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23 are disposed and the floor 63 the floor level of which is different from that of the floor 61. Therefore, by disposing the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 on the same floor 61 (63), it is possible to shorten the pipe length of a connecting pipe and reduce the equipment cost.
- the high pressure moisture separating heater 27 is disposed on one of the floor 61 on which the high and intermediate pressure turbine 21 and the low pressure turbines 22 and 23 are disposed and the floor 63 the floor level of which is different from that of the floor 61, and the low pressure moisture separating heater 28 is disposed on another floor of the floors 61 and 63. Therefore, by disposing the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 on the different floors 61 and 63, it is possible to secure the pipe length of the connecting pipe, to alleviate an adverse effect due to thermal stress, and it is possible to efficiently utilize each of the floors 61 and 63 to secure a maintenance space and to improve maintainability.
- FIG. 7 is a plan view showing an arrangement of a steam turbine plant according to a second embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
- the steam turbine plant of the second embodiment includes the high and intermediate pressure turbine 21, the low pressure turbine 22, the pipe 31, the high pressure moisture separating heater 27, and the low pressure moisture separating heater 28.
- the low pressure moisture separating heater 28 includes the two low pressure moisture separating heaters 28a and 28b, and they are disposed on the floor 61 so as to be positioned on both sides in the width direction of the high and intermediate pressure turbine 21, symmetrically with respect to the center line in the axial direction C.
- the one high pressure moisture separating heater 27 is disposed on the side opposite to the low pressure turbine 22 in the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heater 27 is disposed on the floor 61 along the axial direction C adjacent to the high and intermediate pressure turbine 21. In this case, the high pressure moisture separating heater 27, the high and intermediate pressure turbine 21, and the low pressure turbine 22 are disposed in a straight line along the axial direction C.
- the high pressure moisture separating heater 27 is disposed along the axial direction C of the high and intermediate pressure turbine 21. Therefore, it is possible to effectively utilize the space in the longitudinal direction of the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28.
- FIG. 8 is a plan view showing an arrangement of a steam turbine plant according to a third embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
- the steam turbine plant of the third embodiment includes the high and intermediate pressure turbine 21, the low pressure turbine 22, the steam pipe 31, the high pressure moisture separating heater 27, and the low pressure moisture separating heater 28.
- the low pressure moisture separating heater 28 includes the two low pressure moisture separating heaters 28a and 28b, and they are disposed on the floor 61 so as to be positioned symmetrically on both sides in the width direction of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heater 27 includes the two high pressure moisture separating heaters 27a and 27b, and they are disposed on the side opposite to the low pressure turbine 22 in the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heaters 27a and 27b are disposed on the floor 61 along the direction intersecting the axial direction C while being adjacent to the high and intermediate pressure turbine 21, and moreover, the high pressure moisture separating heaters 27a and 27b are disposed symmetrically with respect to the center line in the axial direction C.
- the plurality of (two in the present embodiment) high pressure moisture separating heaters 27a and 27b are disposed in parallel at a predetermined interval.
- the two high pressure moisture separating heaters 27a and 27b as the high pressure moisture separating heater 27 are disposed in parallel, and also the high pressure moisture separating heaters 27a and 27b are disposed symmetrically with respect to the center line in the axial direction C while intersecting the center line. Therefore, by disposing the high pressure moisture separating heater 27 and the low pressure moisture separating heater 28 in an intersecting manner to effectively utilize the space, it is possible to downsize the turbine building, and to process the steam from the high pressure turbine unit 25 in a well-balanced manner.
- FIG. 9 is a plan view showing an arrangement of a steam turbine plant of a fourth embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
- the steam turbine plant of the fourth embodiment includes the high and intermediate pressure turbine 21, the low pressure turbine 22, the pipe 31, the high pressure moisture separating heater 27, and the low pressure moisture separating heater 28.
- the low pressure moisture separating heater 28 includes the two low pressure moisture separating heaters 28a and 28b, and they are disposed on the floor 61 so as to be positioned symmetrically on both sides in the width direction of the high and intermediate pressure turbine 21.
- the one high pressure moisture separating heater 27 is disposed on the side opposite to the low pressure turbine 22 in the axial direction C of the high and intermediate pressure turbine 21.
- the high pressure moisture separating heater 27 is disposed on the floor 61 along the direction intersecting the axial direction C while being adjacent to the high and intermediate pressure turbine 21, and moreover, the high pressure moisture separating heater 27 is disposed symmetrically with respect to the center line in the axial direction C.
- the deaerator 47 is disposed adjacent and in parallel to the high pressure moisture separating heater 27.
- the one high pressure moisture separating heater 27 is disposed symmetrically with respect to the center line in the axial direction C while intersecting the center line. Therefore, by effectively utilizing the space in the axial direction, it is possible to downsize the turbine building, and to process the steam from the high pressure turbine unit 25 in a well-balanced manner.
- the four low pressure feed water heaters 43, 44, 45, and 46 are provided, of which the two low pressure feed water heaters 43 and 44 are disposed in the condensers 33 and 34, and the two low pressure feed water heaters 45 and 46 are disposed outside the condensers 33 and 34.
- the arrangement and the number of low pressure feed water heaters are not limited to those of the embodiments, and they may be set appropriately according to the scale of the steam turbine plant or the like.
- the steam exhausted from the final stage of the intermediate pressure turbine unit 26 is supplied to the low pressure moisture separating heater 28 (28a and 28b); however, the steam extracted from the middle stage of the intermediate pressure turbine unit 26 may be supplied to the low pressure moisture separating heater 28 (28a and 28b).
- the moisture separating heater has been described, but it may be a moisture separator.
- the steam turbine plant of the present invention is applied to a nuclear power plant; however, the present invention is not limited thereto, and for example, the present invention can be applied to a thermal power plant or the like.
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Abstract
Description
- The present invention relates to a steam turbine plant used for nuclear power plants, thermal power plants, and the like.
- For example, a nuclear power plant sends steam generated by a steam generator to a steam turbine, and drives a connected generator to generate electricity. Generally, a steam turbine includes a high pressure turbine and a low pressure turbine, and steam used in the high pressure turbine is sent to the low pressure turbine after the moisture is removed by a moisture separating heater and the steam is heated. The steam used in the steam turbine is cooled by a condenser to become condensate, and the condensate is returned to the steam generator after being heated by a low pressure feed water heater, a high pressure feed water heater or the like.
- As a system considering further performance improvement in such a nuclear power plant, a steam turbine (high pressure turbine, intermediate pressure turbine, and low pressure turbine), generator, high pressure moisture separating heater, low pressure moisture separating heater, and the like are disposed in one turbine building. An example of such a steam turbine plant is described in the following Patent Literature 1.
- Patent Literature 1:
JP S62-218606 A - In a conventional steam turbine plant, in order to realize a system configuration disclosed in Patent Literature 1, in the high pressure moisture separating heater and the low pressure moisture separating heater, equipment and pipe become large in order to suppress increase in flow velocity of the steam to be processed. For this reason, the high pressure moisture separating heater and the low pressure moisture separating heater are generally disposed at a position separated from the steam turbine or on a floor a floor level of which is different from that of the floor on which the steam turbine is disposed. In this case, there is a problem that a turbine building increases in size, an equipment cost increases, and maintainability of the moisture separating heaters is not good.
- An object of the present invention is to solve the above-mentioned problem, and to provide a steam turbine plant that achieves simplification of the structure and reduction of equipment cost.
- According to the present invention, there is provided a steam turbine plant comprising: a high and intermediate pressure turbine having a high pressure turbine unit at one end in an axial direction and an intermediate pressure turbine unit at the other end; at least one low pressure turbine disposed coaxially with the high and intermediate pressure turbine; at least one high pressure moisture separator arranged to remove moisture from steam from the high pressure turbine unit and send the steam to the intermediate pressure turbine unit; and at least one low pressure moisture separator arranged to remove the moisture from the steam from the intermediate pressure turbine unit and send the steam to the at least one low pressure turbine, wherein the at least one high pressure moisture separator and the at least one low pressure moisture separator are each disposed symmetrically with respect to a center line along the axial direction of the high and intermediate pressure turbine.
- Therefore, by disposing the high pressure moisture separator and the low pressure moisture separator each symmetrically with respect to the center line of the high and intermediate pressure turbine, the high pressure moisture separator can be disposed in the vicinity of the high and intermediate pressure turbine or the low pressure turbine. Thus a pipe length is shortened, the structure can be simplified, the equipment cost can be reduced, and the turbine building can also be downsized.
- According to the present invention, the steam turbine plant comprises the two high pressure moisture separators and the two low pressure moisture separators, wherein the two high pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, and the two high pressure moisture separators and the two low pressure moisture separators are disposed in series along the axial direction.
- Therefore, by disposing the two high pressure moisture separators and the two low pressure moisture separators in series on both sides of the high and intermediate pressure turbine, it is possible to effectively utilize space in the longitudinal direction of various devices.
- In the steam turbine plant according to the present invention, the at least one high pressure moisture separator is disposed on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the at least one low pressure moisture separator is disposed on a low pressure turbine side in the axial direction of the high and intermediate pressure turbine.
- Therefore, by disposing the high pressure moisture separator on the high and intermediate pressure turbine side and disposing the low pressure moisture separator on the low pressure turbine side, the high pressure moisture separator is disposed in the vicinity of the high and intermediate pressure turbine, and the low pressure moisture separator is disposed in the vicinity of the low pressure turbine. Thus the pipe length is shortened, the structure can be simplified, and the equipment cost can be reduced.
- According to the present invention, the steam turbine plant comprises the one high pressure moisture separator and the two low pressure moisture separators, wherein the one high pressure moisture separator is disposed along the center line on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine.
- Therefore, by disposing the one high pressure moisture separator and the two low pressure moisture separators along the center line on the high and intermediate pressure turbine side and disposing the two low pressure moisture separators on both sides of the high and intermediate pressure turbine, it is possible to effectively utilize the space in the longitudinal direction of various devices.
- In the steam turbine plant according to the present invention, the at least one high pressure moisture separator is disposed along a direction intersecting the axial direction.
- Therefore, by disposing the high pressure moisture separator in a direction intersecting the high and intermediate pressure turbine and the low pressure turbine, the space in the axial direction can be effectively utilized, thereby downsizing the turbine building.
- In the steam turbine plant according to the present invention, the at least one high pressure moisture separator and the at least one low pressure moisture separator are disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor.
- Therefore, by disposing the high pressure moisture separator and the low pressure moisture separator on the same floor, it is possible to shorten the pipe length of a connecting pipe and reduce the equipment cost.
- In the steam turbine plant according to the present invention, the at least one high pressure moisture separator is disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor, and the at least one low pressure moisture separator is disposed on another floor of the first floor and the second floor.
- Therefore, by disposing the high pressure moisture separator and the low pressure moisture separator on different floors, it is possible to secure the pipe length of the connecting pipe to alleviate an adverse effect due to thermal stress, and it is possible to efficiently utilize each of the floors to secure a maintenance space and to improve maintainability.
- In the steam turbine plant according to the present invention, the at least one high pressure moisture separator is a high pressure moisture separating heater.
- Therefore, by properly heating the steam, thermal efficiency of the turbine plant can be further improved.
- According to the steam turbine plant of the present invention, since the high pressure moisture separator and the low pressure moisture separator are each disposed symmetrically with respect to the center line along the axial direction of the high and intermediate pressure turbine, the structure can be simplified, and the equipment cost can be reduced.
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FIG. 1 is a schematic configuration diagram showing a nuclear power plant according to a first embodiment. -
FIG. 2 is a schematic diagram showing flow of condensate and steam in a steam turbine plant of the first embodiment. -
FIG. 3 is a plan view showing an arrangement of the steam turbine plant according to the first embodiment. -
FIG. 4 is a front view showing an arrangement of the steam turbine plant. -
FIG. 5 is a front view showing another arrangement of the steam turbine plant. -
FIG. 6 is a front view showing another arrangement of the steam turbine plant. -
FIG. 7 is a plan view showing an arrangement of a steam turbine plant according to a second embodiment. -
FIG. 8 is a plan view showing an arrangement of a steam turbine plant according to a third embodiment. -
FIG. 9 is a plan view showing an arrangement of a steam turbine plant according to a fourth embodiment. - Preferred embodiments of a steam turbine plant of the present invention will be described in detail below with reference to the accompanying drawings. It is to be noted that the present invention is not limited by these embodiments. In addition, when there are a plurality of embodiments, the present invention also includes a combination of these embodiments.
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FIG. 1 is a schematic configuration diagram showing a nuclear power plant according to a first embodiment. - A nuclear reactor of the first embodiment is a pressurized water reactor (PWR) that uses light water as nuclear reactor coolant and neutron moderator, produces high temperature and high pressure water without boiling over the whole reactor core, sends this high temperature and high pressure water to the steam generator to generate steam by heat exchange, and sends this steam to a turbine generator to generate electricity.
- In the nuclear power plant having the pressurized water reactor of the first embodiment, as shown in
FIG. 1 , areactor containment 11 has a pressurizedwater reactor 12 and asteam generator 13 therein, and the pressurizedwater reactor 12 and thesteam generator 13 are connected viapipes pressurizer 16 is provided in thepipe 14, and a primarycooling water pump 17 is provided in thepipe 15. In this case, light water is used as moderator and primary cooling water (coolant). In order to suppress boiling of the primary cooling water in a reactor core, a primary cooling system is controlled by thepressurizer 16 so as to maintain a high pressure state of about 150 to 160 atm. Therefore, in the pressurizedwater reactor 12, the light water is heated as primary cooling water by low enriched uranium or MOX as fuel (nuclear fuel), and the high temperature primary cooling water is sent to thesteam generator 13 through thepipe 14 while being maintained at a predetermined high pressure by thepressurizer 16. In thissteam generator 13, heat exchange is performed between the high temperature and high pressure primary cooling water and secondary cooling water, and the cooled primary cooling water is returned to the pressurizedwater reactor 12 through thepipe 15. - The
steam generator 13 is connected to asteam turbine 19 via apipe 18, and a mainsteam isolation valve 20 is provided in thepipe 18. Thesteam turbine 19 has a high andintermediate pressure turbine 21 and twolow pressure turbines generator 24 is connected coaxially. The high andintermediate pressure turbine 21 has a highpressure turbine unit 25 and an intermediatepressure turbine unit 26, and a high pressuremoisture separating heater 27 is provided between the highpressure turbine unit 25 and the intermediatepressure turbine unit 26. Furthermore, a low pressuremoisture separating heater 28 is provided between the high and intermediate pressure turbine 21 (intermediate pressure turbine unit 26) and thelow pressure turbines pipe 18 from thesteam generator 13 is connected to an inlet portion of the highpressure turbine unit 25, asteam pipe 29 is connected from an outlet portion of the highpressure turbine unit 25 to the inlet portion of the high pressuremoisture separating heater 27, and asteam pipe 30 is connected from an outlet portion of the high pressuremoisture separating heater 27 to an inlet portion of the intermediatepressure turbine unit 26. Furthermore, asteam pipe 31 is connected from an outlet portion of the intermediatepressure turbine unit 26 to an inlet portion of the low pressuremoisture separating heater 28, and asteam pipe 32 is connected from an outlet portion of the low pressuremoisture separating heater 28 to respective inlet portions of thelow pressure turbines - In the
steam turbine 19,condensers low pressure turbines condensers low pressure turbines condensers intake pipe 35 and adrain pipe 36 for supplying and discharging the cooling water. Theintake pipe 35 has a circulatingwater pump 37, and one end portion thereof is disposed in the sea together with thedrain pipe 36. - A
pipe 38 is connected to thecondensers condensate pump 39, agland condenser 40, acondensate demineralizer 41, acondensate booster pump 42, and low pressurefeed water heaters pipe 38 in order along the flow direction of the condensate. Here, the first low pressurefeed water heater 43 and the second low pressurefeed water heater 44 are provided in thecondensers low pressure turbines feed water heater 45 and the fourth low pressurefeed water heater 46 are provided outside thecondensers feed water heater 45, the condensate is heated by the steam extracted from thelow pressure turbines feed water heater 46, the condensate is heated by the steam exhausted from the intermediatepressure turbine unit 26. - Furthermore, on the downstream side of the fourth low pressure
feed water heater 46, thepipe 38 is provided with adeaerator 47, a mainfeed water pump 48, a high pressurefeed water heater 49, and a main feedwater control valve 50 in this order along the flow direction of the condensate. - Therefore, the steam generated by performing the heat exchange with the high temperature and high pressure primary cooling water in the
steam generator 13 is sent to thesteam turbine 19 through thepipe 18, the high andintermediate pressure turbine 21 and each of thelow pressure turbines generator 24 is driven by this rotational force to generate electricity. At this time, after the steam from thesteam generator 13 drives the highpressure turbine unit 25, the moisture contained in the steam is removed by the high pressuremoisture separating heater 27, and the steam is heated to drive the intermediatepressure turbine unit 26. Furthermore, the steam that has driven the intermediatepressure turbine unit 26 drives thelow pressure turbines moisture separating heater 28 and the steam is heated. Then, the steam that has driven thelow pressure turbines condensers pipe 38 by thecondensate pump 39, and is returned through thegland condenser 40, thecondensate demineralizer 41, the low pressurefeed water heaters deaerator 47, the high pressurefeed water heater 49, and the like to thesteam generator 13. - Described here are flows of the condensate and the steam in the high and
intermediate pressure turbine 21, thelow pressure turbines moisture separating heater 27, the low pressuremoisture separating heater 28, and the low pressurefeed water heaters FIG. 2 is a schematic diagram showing the flow of the condensate and the steam in a steam turbine plant of the first embodiment. - As shown in
FIG. 2 , thesteam pipe 31 from the outlet portion of the intermediatepressure turbine unit 26 to the inlet portion of the low pressuremoisture separating heater 28 is connected to a base end portion of asteam branch pipe 51 branched from a middle portion of thesteam pipe 31, and a distal end portion of thesteam branch pipe 51 is connected to the fourth low pressurefeed water heater 46. Further, a distal end portion of ableed air pipe 52 from thelow pressure turbines feed water heater 45. Therefore, the third low pressurefeed water heater 45 heats the condensate with the steam extracted from thelow pressure turbines feed water heater 46 heats the condensate with the steam exhausted from the intermediatepressure turbine unit 26. - In addition, drain (water) is generated in each of the low pressure
feed water heaters drain pipe 53 is connected from the fourth low pressurefeed water heater 46 to the third low pressurefeed water heater 45, adrain pipe 54 is connected from the third low pressurefeed water heater 45 to the second low pressurefeed water heater 44, and adrain pipe 55 is connected from the second low pressurefeed water heater 44 to the first low pressurefeed water heater 43. Adrain pipe 56 is connected from the first low pressurefeed water heater 43 to a portion in thepipe 38 between the first low pressurefeed water heater 43 and the second low pressurefeed water heater 44, and adrain pump 57 is provided in thedrain pipe 56. - In the steam turbine plant of the first embodiment configured as described above, the high pressure
moisture separating heater 27, the low pressuremoisture separating heater 28, and the like are disposed efficiently in the limited space with respect to thesteam turbine 19. -
FIG. 3 is a plan view showing an arrangement of the steam turbine plant of the first embodiment, andFIG. 4 is a front view showing an arrangement of the steam turbine plant. - As shown in
FIGS. 3 and 4 , the steam turbine plant of the first embodiment includes the high andintermediate pressure turbine 21, thelow pressure turbines generator 24, the high pressure moisture separating heater 27 (27a and 27b), and the low pressure moisture separating heater 28 (28a and 28b). - A turbine building (not shown) includes a plurality of floors. A
foundation 62 is laid at a center of a predetermined floor (first floor) 61, and on thefoundation 62, the high andintermediate pressure turbine 21, the twolow pressure turbines generator 24 are installed coaxially along the axial direction C. - The low pressure
moisture separating heater 28 includes two low pressuremoisture separating heaters floor 61 so as to be positioned on both sides of the high andintermediate pressure turbine 21 in a width direction (vertical direction inFIG. 3 ). Each of the low pressuremoisture separating heaters intermediate pressure turbine 21 and each of thelow pressure turbines moisture separating heaters intermediate pressure turbine 21 and sends the steam to thelow pressure turbines steam pipes FIG. 2 ), and distal end portions thereof are respectively connected to the inlet portions of the low pressuremoisture separating heaters Steam pipes low pressure turbines moisture separating heaters moisture separating heaters steam generator 13 circulates. - Furthermore, the high pressure
moisture separating heater 27 includes two high pressuremoisture separating heaters floor 61 so as to be positioned on both sides of the high andintermediate pressure turbine 21 in the width direction (vertical direction inFIG. 3 ). Each of the high pressuremoisture separating heaters pressure turbine unit 25 and sends the steam to the intermediatepressure turbine unit 26.Steam pipes FIG. 2 ), and distal end portions thereof are respectively connected to the inlet portions of the high pressuremoisture separating heaters Steam pipes pressure turbine unit 26 from the outlet portions of the high pressuremoisture separating heaters moisture separating heaters steam generator 13 circulates. - Then, the high and
intermediate pressure turbine 21, thelow pressure turbines generator 24, the high pressure moisture separating heater 27 (27a and 27b), and the low pressure moisture separating heater 28 (28a and 28b) are disposed on thesame floor 61. - The high pressure
moisture separating heaters moisture separating heaters intermediate pressure turbine 21 and thelow pressure turbines moisture separating heaters intermediate pressure turbine 21 in parallel with the axial direction C. The two low pressuremoisture separating heaters intermediate pressure turbine 21 and thelow pressure turbines moisture separating heaters low pressure turbines intermediate pressure turbine 21, and the low pressuremoisture separating heaters low pressure turbines intermediate pressure turbine 21. The high pressuremoisture separating heaters moisture separating heaters - Although not shown, the deaerator 47 (see
FIG. 2 ) is disposed on thefloor 61 on one side in the axial direction C of the high andintermediate pressure turbine 21, along a direction intersecting the axial direction C of the high andintermediate pressure turbine 21. Thedeaerator 47 removes impurities such as dissolved oxygen and uncondensed gas (ammonia gas) in the condensate (feed water) from the fourth low pressure feed water heater 46 (seeFIG. 2 ). The high pressuremoisture separating heaters intermediate pressure turbine 21 and thedeaerator 47. - In the above-described embodiment, the high pressure moisture separating heater 27 (27a and 27b) and the low pressure moisture separating heater 28 (28a and 28b) are disposed on the
same floor 61 as a floor on which the high andintermediate pressure turbine 21, thelow pressure turbines FIG. 5 and FIG. 6 are front views each showing another arrangement of the steam turbine plant. - As shown in
FIG. 5 , a floor (second floor) 63 is provided below thefloor 61. The high pressuremoisture separating heaters 27a (27b) are disposed on thelower floor 63 different from thefloor 61 on which the high andintermediate pressure turbine 21, thelow pressure turbines moisture separating heaters 27a (27b) are disposed on both sides in the horizontal direction orthogonal to the axial direction C, symmetrically with respect to the center line along the axial direction C so as to be parallel with the axial direction C. Thedeaerator 47 is disposed on thefloor 61 on one side in the axial direction C of the high andintermediate pressure turbine 21, along a direction intersecting the axial direction C of the high andintermediate pressure turbine 21. - Furthermore, as shown in
FIG. 6 , the high pressuremoisture separating heaters 27a (27b) and the low pressuremoisture separating heaters 28a (28b) are disposed on thelower floor 63 different from thefloor 61 on which the high andintermediate pressure turbine 21, thelow pressure turbines moisture separating heaters 27a (27b) and the low pressuremoisture separating heaters 28a (28b) are disposed on both sides in the horizontal direction orthogonal to the axial direction C, symmetrically with respect to the center line along the axial direction C so as to be parallel with the axial direction C. - Although not shown, the high pressure
moisture separating heaters 27a (27b) may be disposed on thefloor 61 on which the high andintermediate pressure turbine 21, thelow pressure turbines moisture separating heaters 28a (28b) may be disposed on thelower floor 63. - Therefore, in the turbine plant of the present embodiment, as shown in
FIGS. 3 to 6 , the two high pressure moisture separating heaters 27 (27a and 27b) and the two low pressure moisture separating heaters 28 (28a and 28b) are symmetrically disposed with respect to the center line along the axial direction C of the high andintermediate pressure turbine 21 and thelow pressure turbines moisture separating heater 27 can be disposed efficiently in the vicinity of the high andintermediate pressure turbine 21, and there is no need to expand the turbine building in a width direction (a horizontal direction orthogonal to the axial direction C) of the high andintermediate pressure turbine 21 and thelow pressure turbines steam pipes moisture separating heater 27 and the low pressuremoisture separating heater 28 are each disposed symmetrically, the flow rate of the steam is balanced well, and performance of the entire plant is improved. - The steam sent from the
steam generator 13 through thepipe 18 drives the highpressure turbine unit 25 of the high andintermediate pressure turbine 21, and is then sent by thesteam pipe 29 to the high pressuremoisture separating heater 27, where the steam is heated while moisture is removed. The steam processed by the high pressuremoisture separating heater 27 drives the intermediatepressure turbine unit 26, and is then sent by thesteam pipe 30 to the low pressuremoisture separating heater 28, where the steam is heated while moisture is removed. The steam processed by the low pressuremoisture separating heater 28 is sent to thelow pressure turbines steam pipe 32 to drive thelow pressure turbines - At this time, the steam exhausted from the intermediate
pressure turbine unit 26 is sent to the low pressuremoisture separating heater 28 by the steam pipe 31 (31a and 31b) and is also sent to the fourth low pressurefeed water heater 46 by thesteam branch pipe 51. The steam extracted from thelow pressure turbines feed water heater 45 through thebleed air pipe 52. Therefore, the third low pressurefeed water heater 45 heats the condensate (feed water) flowing through thepipe 38 by the steam from thelow pressure turbines feed water heater 46 heats the condensate (feed water) heated by the third low pressurefeed water heater 45 and flowing through thepipe 38 by the steam from the intermediatepressure turbine unit 26. - As described above, the steam turbine plant of the first embodiment is provided with: the high and
intermediate pressure turbine 21 having the highpressure turbine unit 25 at one end in the axial direction C and the intermediatepressure turbine unit 26 at the other end; thelow pressure turbines intermediate pressure turbine 21; the high pressure moisture separating heater 27 (27a and 27b) that removes the moisture from the steam from the highpressure turbine unit 25 and sends the steam to the intermediatepressure turbine unit 26; and the low pressure moisture separating heater 28 (28a and 28b) that removes the moisture from the steam from the intermediatepressure turbine unit 26 and sends the steam to thelow pressure turbines moisture separating heater 27 and the low pressuremoisture separating heater 28 are each disposed symmetrically with respect to the center line along the axial direction C of the high andintermediate pressure turbine 21. - Accordingly, the high pressure
moisture separating heater 27 can be disposed in the vicinity of the high andintermediate pressure turbine 21 or thelow pressure turbines - In the steam turbine plant of the present embodiment, the two high pressure
moisture separating heaters intermediate pressure turbine 21, and the two low pressuremoisture separating heaters intermediate pressure turbine 21, with the high pressuremoisture separating heaters moisture separating heaters moisture separating heaters moisture separating heaters - In the steam turbine plant of this embodiment, the high pressure
moisture separating heater 27 is disposed on the side opposite to thelow pressure turbines intermediate pressure turbine 21, and the low pressuremoisture separating heater 28 is disposed on the side of thelow pressure turbines intermediate pressure turbine 21. Thus the high pressuremoisture separating heater 27 is disposed in the vicinity of the high andintermediate pressure turbine 21 and the low pressuremoisture separating heater 28 is disposed in the vicinity of thelow pressure turbines - In the steam turbine plant of the present embodiment, the high pressure
moisture separating heater 27 and the low pressuremoisture separating heater 28 are disposed on one of thefloor 61 on which the high andintermediate pressure turbine 21 and thelow pressure turbines floor 63 the floor level of which is different from that of thefloor 61. Therefore, by disposing the high pressuremoisture separating heater 27 and the low pressuremoisture separating heater 28 on the same floor 61 (63), it is possible to shorten the pipe length of a connecting pipe and reduce the equipment cost. - In the steam turbine plant of the present embodiment, the high pressure
moisture separating heater 27 is disposed on one of thefloor 61 on which the high andintermediate pressure turbine 21 and thelow pressure turbines floor 63 the floor level of which is different from that of thefloor 61, and the low pressuremoisture separating heater 28 is disposed on another floor of thefloors moisture separating heater 27 and the low pressuremoisture separating heater 28 on thedifferent floors floors -
FIG. 7 is a plan view showing an arrangement of a steam turbine plant according to a second embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. - As shown in
FIG. 7 , the steam turbine plant of the second embodiment includes the high andintermediate pressure turbine 21, thelow pressure turbine 22, thepipe 31, the high pressuremoisture separating heater 27, and the low pressuremoisture separating heater 28. - The low pressure
moisture separating heater 28 includes the two low pressuremoisture separating heaters floor 61 so as to be positioned on both sides in the width direction of the high andintermediate pressure turbine 21, symmetrically with respect to the center line in the axial direction C. The one high pressuremoisture separating heater 27 is disposed on the side opposite to thelow pressure turbine 22 in the axial direction C of the high andintermediate pressure turbine 21. The high pressuremoisture separating heater 27 is disposed on thefloor 61 along the axial direction C adjacent to the high andintermediate pressure turbine 21. In this case, the high pressuremoisture separating heater 27, the high andintermediate pressure turbine 21, and thelow pressure turbine 22 are disposed in a straight line along the axial direction C. - As described above, in the steam turbine plant of the second embodiment, the high pressure
moisture separating heater 27 is disposed along the axial direction C of the high andintermediate pressure turbine 21. Therefore, it is possible to effectively utilize the space in the longitudinal direction of the high pressuremoisture separating heater 27 and the low pressuremoisture separating heater 28. -
FIG. 8 is a plan view showing an arrangement of a steam turbine plant according to a third embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. - As shown in
FIG. 8 , the steam turbine plant of the third embodiment includes the high andintermediate pressure turbine 21, thelow pressure turbine 22, thesteam pipe 31, the high pressuremoisture separating heater 27, and the low pressuremoisture separating heater 28. - The low pressure
moisture separating heater 28 includes the two low pressuremoisture separating heaters floor 61 so as to be positioned symmetrically on both sides in the width direction of the high andintermediate pressure turbine 21. The high pressuremoisture separating heater 27 includes the two high pressuremoisture separating heaters low pressure turbine 22 in the axial direction C of the high andintermediate pressure turbine 21. The high pressuremoisture separating heaters floor 61 along the direction intersecting the axial direction C while being adjacent to the high andintermediate pressure turbine 21, and moreover, the high pressuremoisture separating heaters moisture separating heaters - As described above, in the steam turbine plant of the third embodiment, the two high pressure
moisture separating heaters moisture separating heater 27 are disposed in parallel, and also the high pressuremoisture separating heaters moisture separating heater 27 and the low pressuremoisture separating heater 28 in an intersecting manner to effectively utilize the space, it is possible to downsize the turbine building, and to process the steam from the highpressure turbine unit 25 in a well-balanced manner. -
FIG. 9 is a plan view showing an arrangement of a steam turbine plant of a fourth embodiment. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. - As shown in
FIG. 9 , the steam turbine plant of the fourth embodiment includes the high andintermediate pressure turbine 21, thelow pressure turbine 22, thepipe 31, the high pressuremoisture separating heater 27, and the low pressuremoisture separating heater 28. - The low pressure
moisture separating heater 28 includes the two low pressuremoisture separating heaters floor 61 so as to be positioned symmetrically on both sides in the width direction of the high andintermediate pressure turbine 21. The one high pressuremoisture separating heater 27 is disposed on the side opposite to thelow pressure turbine 22 in the axial direction C of the high andintermediate pressure turbine 21. The high pressuremoisture separating heater 27 is disposed on thefloor 61 along the direction intersecting the axial direction C while being adjacent to the high andintermediate pressure turbine 21, and moreover, the high pressuremoisture separating heater 27 is disposed symmetrically with respect to the center line in the axial direction C. Thedeaerator 47 is disposed adjacent and in parallel to the high pressuremoisture separating heater 27. - As described above, in the steam turbine plant of the fourth embodiment, the one high pressure
moisture separating heater 27 is disposed symmetrically with respect to the center line in the axial direction C while intersecting the center line. Therefore, by effectively utilizing the space in the axial direction, it is possible to downsize the turbine building, and to process the steam from the highpressure turbine unit 25 in a well-balanced manner. - In each of the above-described embodiments, the four low pressure
feed water heaters feed water heaters condensers feed water heaters condensers - Further, in the above-described embodiment, the steam exhausted from the final stage of the intermediate
pressure turbine unit 26 is supplied to the low pressure moisture separating heater 28 (28a and 28b); however, the steam extracted from the middle stage of the intermediatepressure turbine unit 26 may be supplied to the low pressure moisture separating heater 28 (28a and 28b). - Further, in the above-described embodiment, the moisture separating heater has been described, but it may be a moisture separator.
- Further, in the above-described embodiment, the steam turbine plant of the present invention is applied to a nuclear power plant; however, the present invention is not limited thereto, and for example, the present invention can be applied to a thermal power plant or the like.
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- 12 PRESSURIZED WATER REACTOR
- 13 STEAM GENERATOR
- 18, 38 PIPE
- 19 STEAM TURBINE
- 21 HIGH AND INTERMEDIATE PRESSURE TURBINE
- 22, 23 LOW PRESSURE TURBINE
- 24 GENERATOR
- 25 HIGH PRESSURE TURBINE UNIT
- 26 INTERMEDIATE PRESSURE TURBINE UNIT
- 27, 27a, 27b HIGH PRESSURE MOISTURE SEPARATING HEATER (HIGH PRESSURE MOISTURE SEPARATOR)
- 28, 28a, 28b LOW PRESSURE MOISTURE SEPARATING HEATER (LOW PRESSURE MOISTURE SEPARATOR)
- 29, 30, 31, 31a, 31b, 32, 32a, 32b STEAM PIPE
- 33, 34 CONDENSER
- 43 FIRST LOW PRESSURE FEED WATER HEATER
- 44 SECOND LOW PRESSURE FEED WATER HEATER
- 45 THIRD LOW PRESSURE FEED WATER HEATER
- 46 FOURTH LOW PRESSURE FEED WATER HEATER
- 51 STEAM BRANCH PIPE
- 52 BLEED AIR PIPE
- 61 FLOOR (FIRST FLOOR)
- 62 FOUNDATION
- 63 FLOOR (SECOND FLOOR)
- C AXIAL DIRECTION
Claims (8)
- A steam turbine plant comprising:a high and intermediate pressure turbine having a high pressure turbine unit at one end in an axial direction and an intermediate pressure turbine unit at the other end;at least one low pressure turbine disposed coaxially with the high and intermediate pressure turbine;at least one high pressure moisture separator arranged to remove moisture from steam from the high pressure turbine unit and send the steam to the intermediate pressure turbine unit; andat least one low pressure moisture separator arranged to remove the moisture from the steam from the intermediate pressure turbine unit and send the steam to the at least one low pressure turbine, whereinthe at least one high pressure moisture separator and the at least one low pressure moisture separator are each disposed symmetrically with respect to a center line along the axial direction of the high and intermediate pressure turbine.
- The steam turbine plant according to claim 1 comprising the two high pressure moisture separators and the two low pressure moisture separators, wherein the two high pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine, and the two high pressure moisture separators and the two low pressure moisture separators are disposed in series along the axial direction.
- The steam turbine plant according to claim 1 or 2, wherein the at least one high pressure moisture separator is disposed on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the at least one low pressure moisture separator is disposed on a low pressure turbine side in the axial direction of the high and intermediate pressure turbine.
- The steam turbine plant according to claim 1 comprising the one high pressure moisture separator and the two low pressure moisture separators, wherein the one high pressure moisture separator is disposed along the center line on a side opposite to the at least one low pressure turbine in the axial direction of the high and intermediate pressure turbine, and the two low pressure moisture separators are disposed on both sides of the high and intermediate pressure turbine.
- The steam turbine plant according to claim 1, wherein the at least one high pressure moisture separator is disposed along a direction intersecting the axial direction.
- The steam turbine plant according to any one of claims 1 to 5, wherein the at least one high pressure moisture separator and the at least one low pressure moisture separator are disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor.
- The steam turbine plant according to any one of claims 1 to 5, wherein the at least one high pressure moisture separator is disposed on one of a first floor on which the high and intermediate pressure turbine and the at least one low pressure turbine are disposed and a second floor a floor level of which is different from that of the first floor, and the at least one low pressure moisture separator is disposed on another floor of the first floor and the second floor.
- The steam turbine plant according to any one of claims 1 to 7, wherein the at least one high pressure moisture separator is a high pressure moisture separating heater.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015162043A JP6081544B1 (en) | 2015-08-19 | 2015-08-19 | Steam turbine plant |
PCT/JP2016/072030 WO2017029956A1 (en) | 2015-08-19 | 2016-07-27 | Steam turbine plant |
Publications (3)
Publication Number | Publication Date |
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EP3324009A1 true EP3324009A1 (en) | 2018-05-23 |
EP3324009A4 EP3324009A4 (en) | 2019-04-17 |
EP3324009B1 EP3324009B1 (en) | 2020-11-25 |
Family
ID=58043301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16836947.8A Active EP3324009B1 (en) | 2015-08-19 | 2016-07-27 | Steam turbine plant |
Country Status (4)
Country | Link |
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EP (1) | EP3324009B1 (en) |
JP (1) | JP6081544B1 (en) |
CN (1) | CN107923264B (en) |
WO (1) | WO2017029956A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11339686B2 (en) | 2018-10-02 | 2022-05-24 | Mitsubishi Power, Ltd. | Moisture separator and steam turbine plant |
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DE3373322D1 (en) * | 1982-11-24 | 1987-10-08 | Bbc Brown Boveri & Cie | Saturated steam turbine plant |
JPS6047803A (en) * | 1983-08-24 | 1985-03-15 | Hitachi Ltd | Turbine facility for boilding-water type nuclear power plant |
JPS63235605A (en) * | 1987-03-24 | 1988-09-30 | Toshiba Corp | Turbine building |
JPS63243410A (en) * | 1987-03-30 | 1988-10-11 | Toshiba Corp | Turbine building |
FR2693827B1 (en) * | 1992-07-15 | 1994-08-19 | Alsthom Gec | Very high power nuclear steam turbine associated with a PWR reactor. |
JPH09242357A (en) * | 1996-03-08 | 1997-09-16 | Hitachi Ltd | Turbine building |
JPH1123771A (en) * | 1997-07-04 | 1999-01-29 | Hitachi Ltd | Turbine building |
JP4191322B2 (en) * | 1999-06-15 | 2008-12-03 | 三菱重工業株式会社 | Steam turbine plant installation method |
JP2003014885A (en) * | 2001-06-29 | 2003-01-15 | Toshiba Corp | Turbine building |
US8499561B2 (en) * | 2009-09-08 | 2013-08-06 | General Electric Company | Method and apparatus for controlling moisture separator reheaters |
EP2472072B1 (en) * | 2010-12-30 | 2017-03-29 | General Electric Technology GmbH | A saturated steam thermodynamic cycle for a turbine and an associated installation |
JP5709671B2 (en) * | 2011-06-30 | 2015-04-30 | 三菱日立パワーシステムズ株式会社 | Moisture separator heater |
JP5865799B2 (en) * | 2012-07-26 | 2016-02-17 | 株式会社東芝 | Pressurized water nuclear plant and steam supply method thereof |
-
2015
- 2015-08-19 JP JP2015162043A patent/JP6081544B1/en active Active
-
2016
- 2016-07-27 CN CN201680047666.XA patent/CN107923264B/en active Active
- 2016-07-27 WO PCT/JP2016/072030 patent/WO2017029956A1/en unknown
- 2016-07-27 EP EP16836947.8A patent/EP3324009B1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11339686B2 (en) | 2018-10-02 | 2022-05-24 | Mitsubishi Power, Ltd. | Moisture separator and steam turbine plant |
Also Published As
Publication number | Publication date |
---|---|
CN107923264A (en) | 2018-04-17 |
JP2017040200A (en) | 2017-02-23 |
WO2017029956A1 (en) | 2017-02-23 |
EP3324009A4 (en) | 2019-04-17 |
CN107923264B (en) | 2019-12-03 |
JP6081544B1 (en) | 2017-02-15 |
EP3324009B1 (en) | 2020-11-25 |
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