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
  • F22B37/26—Steam-separating arrangements
  • F22B37/32—Steam-separating arrangements using centrifugal force
  • F22B37/327—Steam-separating arrangements using centrifugal force specially adapted for steam generators of nuclear power plants
• • 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
  • F22B37/26—Steam-separating arrangements
  • F22B37/32—Steam-separating arrangements using centrifugal force
• • G—PHYSICS
  • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
  • G21D—NUCLEAR POWER PLANT
  • G21D1/00—Details of nuclear power plant
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S55/00—Gas separation
  • Y10S55/23—Steam separators

Definitions

• the present invention relates to a steam / water separator that separates a two-phase flow of gas and liquid into gas and liquid.
• the Pressurized Water Reactor uses light water as a reactor cooling material and a neutron moderator as high-temperature high-pressure water that does not boil over the entire core, and this high-temperature high-pressure water is used as steam. It is sent to a generator to generate steam by heat exchange, and this steam is sent to a turbine generator to generate electricity.
• This pressurized water reactor transfers the heat of the high-temperature and high-pressure primary cooling water to the secondary cooling water via the steam generator, and generates water vapor with the secondary cooling water.
• primary cooling water flows inside a large number of thin heat transfer tubes, heat is transferred to the secondary cooling water flowing outside, and steam is generated to generate electricity by turning a turbine.
• a tube group outer cylinder is arranged in a hollow hermetic body portion with a predetermined distance from the inner wall surface, and an inverted U-shape is formed in the tube group outer cylinder.
• a plurality of heat transfer tubes are arranged, and the end of each heat transfer tube is supported by the tube plate, and the intermediate portion is supported by a plurality of tube support plates supported by stay rods that extend the tube plate force.
• a steam separator and a moisture separator are installed!
• the primary cooling water is supplied to the plurality of heat transfer tubes through the water chamber formed in the lower portion of the body portion, while the secondary cooling water is supplied into the body portion from the water supply pipe formed in the upper portion of the body portion.
• Is supplied to the secondary cooling water by exchanging heat between the primary cooling water (hot water) flowing through the heat transfer tubes and the secondary cooling water (cold water) circulating in the body.
• Water absorbs heat to generate water vapor, and when this water vapor rises, it is separated into water and steam by the steam separator and moisture separator, and the steam is discharged from the upper end of the trunk. The water falls downward.
• a conventional steam separator is composed of a plurality of risers that raise water vapor, swirl vanes provided inside the risers, and a downcomer barrel that is located outside the risers and defines a downcomer space. And facing the upper end of the riser and the down force M It is comprised from the deck plate which is arrange
• the two-phase flow of steam and water generated by the steam generator is introduced from the lower end of each riser and moves upward, swirled and raised by the swirl vane, and the water is contained in the riser. It rises while adhering to the wall surface and forming a liquid film flow, and the vapor rises while swirling above the riser.
• This steam is mainly transferred to the upper part of the deck plate through the orifice and vent, while the water flows out of the riser from the gap between the upper end of the riser and the deck plate and flows into the down force maverel. As a result, only steam flows out onto the deck plate.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2001-079323
• Patent Document 2 Japanese Patent Laid-Open No. 2001-183489
• FIG. 11 and 12 are schematic views showing a conventional steam separator.
• a riser 001 in which water vapor rises has a vertical part 003 connected to the upper end of the curved part 002, and a swirl vane 004 is fixed inside.
• a down force matrix 005 that defines a down force marker space is provided outside the riser 001, and a deck play having an orifice 006 and a vent 007 located above the riser 001 and the downcomer barrel 005. Is provided.
• the present invention solves the above-mentioned problems, and improves the air-water separation performance by making the thickness of the liquid film formed in the air-water riser tube uniform and preventing the overflow of the liquid film flow.
• An object of the present invention is to provide a steam / water separator that achieves the above.
• the air / water separator according to the invention of claim 1 for achieving the above object has an air / water riser pipe having a curved portion at a lower portion thereof to raise a two-phase flow of water and steam, and the air / water separator.
• a swirl vane provided inside the ascending pipe, a precipitator surrounding the air-water ascending pipe and defining an annular downcomer space, and a predetermined upper end of the air-water ascending pipe and the precipitator
• a deck plate disposed opposite to each other with a space and having an orifice above the air-rising pipe; and a liquid film adjusting means for adjusting the thickness of the liquid film formed on the inner surface of the air-rising pipe. It is characterized by having.
• the liquid film adjusting means is located between the curved portion and the swirl vane in the steam-water riser pipe and the bending direction of the curved portion. It has a liquid film flow discharge portion formed on the outside.
• the liquid film adjusting means is located between the curved portion and the swirl vane in the steam-water riser pipe and the bending direction of the curved portion. It is characterized by having a liquid film flow passage for guiding the liquid film formed on the outside to the inside in the bending direction.
• the liquid film flow passage is spirally provided outside the steam / water riser pipe.
• the liquid film adjusting means is formed above the swirl vane in the steam-water riser and is formed outside the bending portion in the bending direction. It has a liquid film flow discharge part.
• the liquid film adjusting means is provided between the curved portion and the swirl vane in the steam-water riser pipe and has a two-phase flow in the center portion. It is characterized by having a resistance plate formed with a passage!
• the liquid film adjusting means has a liquid film flow discharge portion provided at an upper end of the air / water riser pipe, and the liquid film flow discharge portion Is characterized in that the opening area on the outside is set larger than the opening area on the inside in the bending direction of the bending portion.
• the steam / water separator according to the invention of claim 8 is characterized in that the orifice is provided eccentrically with respect to the steam-water riser pipe inward in the bending direction of the bending portion.
• the steam / water separator according to the invention of claim 9 is provided in the steam / water riser pipe having a curved portion at the lower portion thereof, in which the two-phase flow of water and steam rises, and the steam / water riser pipe.
• a swirl vane, a precipitation cylinder that surrounds the air / water riser pipe to define an annular downcomer space, and a predetermined space is disposed opposite to the upper ends of the air / water riser pipe and the precipitation cylinder.
• a deck plate having an orifice above the air / water riser pipe, wherein the orifice is provided eccentric to the inside of the curved portion in the bending direction with respect to the air / water riser pipe. It is a life.
• a steam-water riser pipe having a curved portion at the bottom and rising the two-phase flow of water and steam is provided, and the steam-water riser pipe is provided inside the steam-water riser pipe.
• a swirl vane is provided, a precipitation cylinder surrounding the air riser pipe to define an annular downcomer space is provided, and the air riser pipe and the upper end of the precipitation cylinder are opposed to each other with a predetermined space above the air riser pipe Since a deck plate with an orifice is provided in the air and a liquid film adjusting means is provided to adjust the thickness of the liquid film formed on the inner surface of the air riser pipe, the two-phase flow of water and steam is Lead from the bottom The water is moved upward and swirled and raised by the swirl vane, and the water rises while adhering to the inner surface of the air-water riser pipe and forming a liquid film flow. At this time, the thickness of the liquid film is adjusted by the liquid film adjusting means.
• the down force of the precipitation cylinder without overflowing the water properly flows into the mar space and flows down, while the steam rises while swirling above the air-water riser.
• the thickness of the liquid film formed in the air / water riser pipe is made uniform and the liquid film flow overflows. By preventing this, the air-water separation performance can be improved.
• the liquid film adjusting means is located between the curved portion and the swirl vane in the air / water riser pipe, and the liquid is adjusted to the outside of the curved portion in the bending direction. Since the membrane flow discharge part is formed, the two-phase flow is introduced into the air-water riser pipe and moves upward, and contacts the outside in the bending direction of the bending part to form a liquid film here. Since the liquid film flow is discharged from the liquid film flow discharge section, the thickness of the liquid film will increase without increasing the thickness, and there will be no overflow of water or entrainment of water in the liquid film due to steam, and air-water separation performance Can be improved.
• the liquid film adjusting means is located between the curved portion and the swirl vane in the steam / water riser pipe, and the liquid film adjusting means is disposed outside the curved portion in the curved direction. Since the liquid film flow passage that guides the membrane to the inside in the bending direction is formed, the two-phase flow is introduced into the air-water riser pipe and moves upward, contacts the outside in the bending direction of the bending portion, and the liquid film flows here. However, a part of the liquid film flow is guided to the inside in the bending direction through the liquid film flow passage, so that the liquid film thickness rises without increasing, and the liquid overflow or water vapor causes the liquid film flow to rise. Water content in the membrane is eliminated and the air-water separation performance can be improved.
• the liquid film flow passage is provided spirally outside the air / water riser pipe, a part of the liquid film flow passing through the liquid film flow passage is It flows spirally and is guided to the inside in the bending direction. It imparts a swirling force to the two-phase flow and raises all the steam, thereby improving the steam-water separation performance.
• the liquid film flow discharge part is located above the swirl vane in the air / water riser pipe and outside the bending direction of the bending part.
• the two-phase flow is introduced into the air-water riser pipe and moves upward to the outside of the bending portion in the bending direction.
• a liquid film is formed on contact and grows ascending, but a part of the liquid film flow is discharged from the liquid film flow discharge part, so there is no water overflow or water film entrainment due to steam The air / water separation performance can be improved.
• a two-phase flow passage is formed at the center between the curved portion and the swirl vane in the steam-water riser pipe as the liquid film adjusting means. Since the resistance plate is provided, the two-phase flow is introduced into the air-water riser pipe and moves upward, and contacts the outside in the bending direction of the bending portion to form a liquid film. Since the growth of the membrane flow is suppressed, the thickness of the liquid film is increased without increasing the thickness, and the overflow of water and the entrainment of moisture in the liquid film due to steam are eliminated, and the air-water separation performance can be improved.
• the liquid film flow discharge part is provided at the upper end of the air / water riser pipe, and the liquid film flow discharge part is connected to the curved part. Since the opening area on the outer side is set larger than the opening area on the inner side in the bending direction, the two-phase flow is introduced into the air-water riser pipe and moves upward, and comes into contact with the outer side of the bending part in the bending direction.
• a liquid film is formed and grows ascending, but a part of the liquid film flow is discharged due to the large opening area of the liquid film flow discharge part outside the bending direction of the bending part, which causes water overflow Water and moisture can be removed from the liquid film, and the air-water separation performance can be improved.
• the orifice is provided eccentrically with respect to the steam / water riser pipe inward in the bending direction of the bending portion, so that the liquid film flow formed by the bending portion increases.
• the orifice is provided eccentrically, water overflow from the orifice can be prevented.
• a steam water riser pipe having a curved portion at the bottom and rising in a two-phase flow of water and steam is provided, and the inside of the steam water riser pipe is provided.
• a swirl vane is provided, a precipitation cylinder surrounding the air riser pipe to define an annular downcomer space is provided, and the air riser pipe and the upper end of the precipitation cylinder are opposed to each other with a predetermined space above the air riser pipe
• a deck plate with an orifice is provided at the bottom, and this orifice is arranged eccentrically inside the bending direction of the curved portion with respect to the air riser pipe, so that the two-phase flow of water and steam is guided from the lower end of the air riser pipe.
• FIG. 1 is a schematic view of a main part of a steam separator according to Embodiment 1 of the present invention.
• FIG. 2 is a side view of the riser in the steam separator according to the first embodiment.
• FIG. 3 is a schematic configuration diagram of a power generation facility having a pressurized water reactor to which a steam generator having a steam separator of Example 1 is applied.
• FIG. 4 is a schematic configuration diagram showing a steam generator having the steam separator according to the first embodiment.
• FIG. 5 is a schematic view of the steam separator according to the first embodiment.
• Fig. 6 is a schematic view of the essential portions of the steam-water separator according to Embodiment 2 of the present invention.
• FIG. 7 is a schematic view of the essential parts of a steam-water separator according to Embodiment 3 of the present invention.
• FIG. 8 is a schematic diagram of a main part of a steam-water separator according to Embodiment 4 of the present invention.
• FIG. 9 is a schematic view of the essential parts of a steam / water separator according to Embodiment 5 of the present invention.
• FIG. 10 is a schematic view of the essential portions of a steam / water separator according to Embodiment 6 of the present invention.
• FIG. 11 is a schematic diagram showing a conventional steam separator.
• FIG. 12 is a schematic view showing a conventional steam separator.
• Liquid film flow outlet Liquid film adjusting means
• Liquid film flow passage Liquid film adjusting means
• FIG. 1 is a schematic diagram of a main part of a steam separator according to Embodiment 1 of the present invention
• FIG. 2 is a side view of a riser in the steam separator according to Embodiment 1
• FIG. Fig. 4 is a schematic configuration diagram of a power generation facility having a pressurized water reactor to which a steam generator having a steam / water separator is applied
• Fig. 4 is a schematic configuration diagram showing a steam generator having a steam / water separator of Example 1.
• FIG. 5 is a schematic diagram of the steam separator according to the first embodiment.
• the nuclear reactor of Example 1 uses light water as a reactor coolant and a neutron moderator, and does not boil over the entire core to form high-temperature high-pressure water, which is sent to a steam generator for heat exchange.
• This is a pressurized water reactor (PWR) that generates steam and sends the steam to a turbine generator to generate electricity.
• PWR pressurized water reactor
• a pressurized water reactor 12 and a steam generator 13 are stored in the reactor containment vessel 11, and this pressurized water
• the reactor 12 and the steam generator 13 are connected to each other through cooling water pipes 14 and 15.
• the pressurizer 16 is provided in the cooling water pipe 14, and the cooling water pump 17 is provided in the cooling water pipe 15. It has been.
• light water is used as the moderator and primary cooling water, and the primary cooling system applies a high pressure of about 150 to 160 atmospheres by the pressurizer 16 in order to suppress boiling of the primary cooling water in the core. ing.
• the pressurized water reactor 12 light water is heated as the primary cooling water using low-enriched uranium or MOX as fuel, and steam is generated through the cooling water pipe 14 while the high-temperature light water is maintained at a predetermined high pressure by the pressurizer 16. Sent to vessel 13. In the steam generator 13, heat exchange is performed between high-pressure and high-temperature light water and water as secondary cooling water, and the cooled light water is returned to the pressurized water reactor 12 through the cooling water pipe 15.
• the steam generator 13 is connected to a turbine 18 and a condenser 19 provided outside the reactor containment vessel 11 via cooling water pipes 20, 21, and is connected to the cooling water pipe 21 with a water supply pump 22 Is provided. Further, a generator 23 is connected to the turbine 18, and a condenser pipe 19 is connected to a supply pipe 24 and a water pipe 25 that supply and discharge cooling water (for example, seawater). Therefore, steam generated by exchanging heat with high-pressure and high-temperature light water in the steam generator 13 is sent to the turbine 18 through the cooling water pipe 20, and the turbine 18 is driven by this steam to be generated by the generator 23. Generate electricity. The steam that has driven the turbine 18 is cooled by the condenser 19 and then returned to the steam generator 13 through the cooling water pipe 21.
• the trunk portion 31 has a sealed hollow cylindrical shape, and the lower portion has a slightly smaller diameter with respect to the upper portion. It is.
• a tube group outer cylinder 32 having a cylindrical shape with a predetermined distance from the inner wall surface of the body 31 is disposed in the body 31, and the lower end extends to the vicinity of the tube plate 33.
• the tube group outer cylinder 32 is positioned and supported by the body 31 by a plurality of support members 34 at positions spaced apart by a predetermined interval in the longitudinal direction and at positions spaced apart by a predetermined interval in the circumferential direction.
• a plurality of tube support plates 35 are disposed at height positions corresponding to the support members 34, and a plurality of stays extending upward from the tube plate 33 are provided. Supported by rod 36.
• a heat transfer tube group 38 composed of a plurality of heat transfer tubes 37 having an inverted U shape is disposed, and an end portion of each heat transfer tube 37 is expanded to the tube plate 33. The intermediate portion is supported by a plurality of tube support plates 35.
• the tube A number of through holes (not shown) are formed in the support plate 35, and each heat transfer tube 37 penetrates through the through holes in a non-contact state.
• a water chamber 39 is fixed to the lower end portion of the body portion 31, and the inside is partitioned by a partition wall 40 by an entrance chamber 41 and an exit chamber 42, and an inlet nozzle 43 and an outlet nozzle 44 are formed.
• One end of each heat transfer tube 37 communicates with the entrance chamber 41, and the other end communicates with the exit chamber 42.
• the inlet nozzle 43 is connected to the cooling water pipe 14 described above, while the outlet nozzle 44 is connected to the cooling water pipe 15.
• An upper portion of the body 31 has an air-water separator 45 that separates the feed water into steam and hot water, and moisture that removes the moisture from the separated steam to bring it closer to dry steam.
• a separator 46 is provided.
• a water supply pipe 47 for supplying secondary cooling water is inserted into the body 31 between the heat transfer tube group 38 and the steam / water separator 45 at the body 31, while the ceiling section is provided with a water supply pipe 47.
• a steam outlet 48 is formed. The secondary cooling water supplied into the body 31 from the water supply pipe 47 flows down between the body 31 and the tube group outer cylinder 32 and is moved upward in the tube plate 33 into the body 31.
• a water supply passage 49 is provided for exchanging heat with the hot water (primary cooling water) flowing through the heat transfer tubes 37 when circulating in the heat transfer tube group 38.
• the water supply pipe 47 is connected to the above-described cooling water pipe 21, while the steam outlet 48 is connected to the cooling water pipe 20.
• the primary cooling water heated in the pressurized water reactor 12 is sent to the entry chamber 41 of the steam generator 13 through the cooling water pipe 14, circulated through the numerous heat transfer tubes 37, and the exit chamber 42. Leads to.
• the secondary cooling water cooled by the condenser 19 is sent to the water supply pipe 47 of the steam generator 13 through the cooling water pipe 21 and flows through the heat transfer pipe 37 through the water supply path 49 in the trunk 31.
• Exchange heat with water primary cooling water. That is, heat exchange is performed between the high-pressure and high-temperature primary cooling water and the secondary cooling water in the body 31, and the cooled primary cooling water passes from the outlet chamber 42 through the cooling water pipe 15 to the pressurized water reactor. Returned to 12.
• the secondary cooling water that has exchanged heat with the high-pressure and high-temperature primary cooling water rises in the body 31 and is separated into steam and hot water by the steam / water separator 45, and by the moisture separator 46. After the moisture of the steam is removed, it is sent to the turbine 18 through the cooling water pipe 20.
• the upper part of the tube group outer cylinder 32 has a plurality of vertical shapes located in the central portion.
• Riser (air riser) 5 1 and a riser (air-water riser pipe) 52 which is located on the outer peripheral portion and has a curved shape is provided.
• a work space is required between the riser 52 and the barrel 31 located on the outer periphery of the tube group outer cylinder 32 to allow the operator to perform welding work, etc. during manufacture.
• the lower end of the riser 52 located on the outer periphery of 32 needs to be curved.
• a liquid film adjusting means for adjusting the thickness of the liquid film formed on the inner surface of the riser 52 into which the two-phase flow of steam and hot water is introduced is provided.
• the riser 52 is configured by integrally connecting the curved portion 54 to the lower portion of the vertical portion 53 by welding or the like.
• the downward force of the curved portion 54 can also introduce a two-phase flow of steam and hot water.
• a swirl vane (swinging blade) 55 is fixed inside the vertical part 53, and a turning force can be applied to the two-phase flow.
• a down force mable barrel 56 is provided outside the vertical portion 53 of the riser 52 so as to surround the riser 52, and is supported by the tube group outer cylinder 32 by the stay 57 so that the riser 52
• An annular downcomer space 58 is defined between the Dunkama barrel 56 and the Dunkama barrel 56.
• a deck plate 60 having a predetermined space is disposed above the riser 52 and the down force mabel 56, and an outer peripheral portion is fixed to the tube group outer cylinder 32.
• an orifice 61 is formed so as to face the riser 52, and a plurality of vents 62 are formed adjacent to the orifice 61.
• the riser 52 is positioned between the curved portion 54 and the swirl vane 55, and serves as a liquid film adjusting means on the vertical portion 53 on the outer side in the curved direction of the curved portion 54.
• 63 is formed.
• the plurality of slits 64 are horizontally formed at the lower end portion of the vertical portion 53.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52 and rises, rises due to the swirl force by the swirl vane 55, and depends on the difference in swirl radius according to the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, thereby contacting the inner surface of the curved portion 54 on the outer side in the curved direction and forming a liquid film there.
• the slit 64 is formed on the upper part of the force, and a part of the liquid film flow is discharged to the outside from the slit 64, so that the thickness of the liquid film does not increase. That is, although a liquid film is formed on the inner surface of the riser 52, the thickness of the liquid film in the circumferential direction is adjusted by the liquid film flow discharge part 63 composed of a plurality of slits 64 and rises while being uniform.
• the hot water flows from the orifice 61 properly and flows into the downcomer space 58 of the downforce mablel 56 where it does not overflow.
• the steam rises while swirling above the riser 52, but since the liquid film is not biased, it is properly discharged above the deck plate 60 through the orifice 61 without involving moisture.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is fixed.
• An annular downcomer space 58 is defined by providing a dunkama barrel 56 on the outside, and a deck plate 60 is disposed with a predetermined space above the riser 52 and down force mabel 56, and an orifice 61 and a vent 62 are provided.
• the two-phase flow of steam and hot water introduced into the riser 52 comes into contact with the inner surface of the bending portion 54 outside in the bending direction, and a liquid film is formed here. Since the flow is discharged to the outside through the slit 64 of the liquid film flow discharge section 63, the thickness of the liquid film in the circumferential direction is adjusted to be uniform, and the down force Muller 56 is reduced so that hot water does not overflow from the orifice 61. While it can properly flow into the commer space 58 and flow down, the steam rises while swirling above the riser 52, but since the liquid film is not biased, it passes through the orifice 61 without involving moisture. As a result, the air can be discharged to the upper side of the deck plate 60, and as a result, the air-water separation performance can be improved.
• the liquid film adjusting means of the present invention is configured by forming a plurality of horizontal slits 64 as the liquid film flow discharge section 63 on the outer side in the bending direction of the bending section 54. Therefore, the thickness of the liquid film formed on the inner surface of the bending portion 54 on the outer side in the bending direction can be adjusted with a simple configuration.
• the liquid film flow discharger 63 as the liquid film adjusting means may be a force composed of a plurality of horizontal slits 64, and may be a plurality of round holes.
• FIG. 6 is a schematic view of the main part of the steam-water separator according to Embodiment 2 of the present invention.
• symbol is attached
• the riser 52 is configured by connecting a curved portion 54 to the lower portion of the vertical portion 53, and the downward force of the curved portion 54 is also reduced.
• a two-phase flow of steam and hot water can be introduced, and a swirl vane 55 is fixed inside the vertical part 53.
• a down force mabel 56 is provided so as to surround the vertical portion 53 of the riser 52, so that an annular downcomer space 58 is defined between the riser 52 and the down force mabel 56.
• a deck plate 60 is disposed above the riser 52 and the down force mabel 56 with a predetermined space, and an orifice 61 and a vent 62 are formed.
• the riser 52 is positioned between the bending portion 54 and the swirl vane 55, and as a liquid film adjusting means, the liquid film of the vertical portion 53 outside the bending direction of the bending portion 54 is bent in the bending direction. on the inside A liquid film flow passage 71 is formed.
• the liquid film flow passage 71 includes a spiral cover 72 fixed to connect the outside in the bending direction and the inside in the bending direction of the bending portion 54 to the outside of the vertical portion 53, and the cover 72.
• a plurality of lower slits 73 and a plurality of upper slits 74 communicating the space in the cover 72 and the interior of the riser 52 are configured.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52 and rises, rises due to the swirl force by the swirl vane 55, and depends on the difference in swirl radius according to the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, so that a liquid film is formed in contact with the inner surface of the curved portion 54 outside in the curved direction.
• a liquid film flow passage 71 is formed so that the outer force in the bending direction also reaches the inner side in the bending direction, and a part of the liquid film flow enters the cover 72 from the lower slit 73 and rises from the upper slit 74 to the riser 52. Therefore, the thickness of the liquid film outside the bending direction in the vertical portion 53 does not increase.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is fixed.
• An annular downcomer space 58 is defined by providing the uncama barrel 56, a deck plate 60 is disposed with a predetermined space above the riser 52 and the down force mabel 56, and an orifice 61 and a vent 62 are formed.
• a liquid film flow passage 71 is formed between the curved portion 54 of the riser 52 and the swirl vane 55 to guide the liquid film of the vertical portion 53 outside the curved portion 54 in the curved direction to the inside in the curved direction. Yes.
• the two-phase flow of steam and hot water introduced into the riser 52 is in contact with the inner surface of the bending portion 54 on the outer side in the bending direction and forms a liquid film there.
• the steam can properly flow into the commer space 58 and flow down, the steam rises while swirling above the riser 52. As a result, the air / water separation performance can be improved.
• the liquid film adjusting means of the present invention is used as a liquid film flow passage 71 that guides the liquid film of the vertical portion 53 outside the bending portion 54 in the bending direction to the inside in the bending direction.
• the membrane flow passage 71 is connected to the outside of the vertical portion 53 with a spiral cover 72 fixed so as to connect the outside in the bending direction and the inside in the bending direction, and the space in the cover 72 and the riser 52 A plurality of lower slits 73 and a plurality of upper slits 74 communicating with each other are formed.
• FIG. 7 is a schematic view of the main part of the steam-water separator according to Embodiment 3 of the present invention.
• symbol is attached
• the riser 52 is configured by connecting the curved portion 54 to the lower portion of the vertical portion 53 and the downward force of the curved portion 54 is also reduced. Two-phase flow of steam and hot water can be introduced, and swirl vane 55 is fixed inside vertical section 53. Yes. Then, a down force mabel 56 is provided so as to surround the vertical portion 53 of the riser 52, so that an annular downcomer space 58 is defined between the riser 52 and the down force mabel 56. In addition, a deck plate 60 is disposed above the riser 52 and the down force mabel 56 with a predetermined space, and an orifice 61 and a vent 62 are formed.
• a liquid film flow discharge portion 81 is formed in the vertical portion 53 on the outer side in the bending direction of the bending portion 54 as a liquid film adjusting means located above the swirl vane 55.
• a plurality of slits 82 as the liquid film flow discharge portion 81 are formed horizontally at the upper end portion of the vertical portion 53.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52 and rises, rises due to the swirl force by the swirl vane 55, and depends on the difference in swirl radius depending on the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, so that a liquid film is formed in contact with the inner surface of the curved portion 54 on the outer side in the curved direction.
• the swirl vane 55 Even after the swirl force is applied by the swirl vane 55, the liquid film thickness grows and rises, but a slit 82 is formed at the upper part of the vertical part 53, and a part of the liquid film flow is Since the liquid is discharged from the slit 82 to the outside, the thickness of the liquid film does not increase.
• the thickness of the liquid film in the circumferential direction at the upper part of the vertical part 53 is adjusted and uniform by the liquid film flow discharge part 81 composed of a plurality of slits 82.
• the hot water overflows from the orifice 61 and properly flows into the downcomer space 58 of the downforce mable barrel 56 and flows down.
• the steam rises while swirling above the riser 52, but it enters the liquid film. Since there is no bias, water is properly discharged to the upper side of the deck plate 60 through the orifice 61 without involving moisture.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is fixed.
• An annular downcomer space 58 is defined by providing a dunkama barrel 56 on the outside, and a deck plate 60 is disposed with a predetermined space above the riser 52 and down force mabel 56, and an orifice 61 and a vent 62 are provided.
• the two-phase flow of steam and hot water introduced into the riser 52 comes into contact with the inner surface of the bending portion 54 on the outer side in the bending direction, and a liquid film is formed here, and this liquid film grows.
• Force that rises up to the vertical part 53 Since a part of the liquid film flow is discharged outside from the slit 82 of the liquid film flow discharge part 81, the thickness of the liquid film in the circumferential direction at the upper end part of the riser 52 is adjusted to be uniform.
• the hot water does not overflow from the orifice 61, it can properly flow into the down force main space 58 of the down force barrel 56 and flow down, while the steam rises while rotating above the riser 52.
• since there is no bias in the liquid film water can be properly discharged through the orifice 61 without involving water, and as a result, the air-water separation performance can be improved.
• the liquid film adjusting means of the present invention is configured by forming a plurality of horizontal slits 82 as liquid film flow discharge portions 81 outside the bending portion 54 in the vertical portion 53 in the bending direction. ing. Therefore, the thickness of the liquid film formed on the inner surface of the vertical portion 53 on the outer side in the bending direction can be adjusted with a simple configuration.
• the liquid film flow discharge portion 81 as the liquid film adjusting means may be a force composed of a plurality of horizontal slits 82 and a plurality of round holes.
• FIG. 8 is a schematic view of the essential portions of the steam-water separator according to Embodiment 4 of the present invention.
• symbol is attached
• the riser 52 is configured by connecting the curved portion 54 to the lower portion of the vertical portion 53 and the downward force of the curved portion 54 is also generated. A two-phase flow of steam and hot water can be introduced, and a swirl vane 55 is fixed inside the vertical part 53.
• a down force mabel 56 is provided so as to surround the vertical portion 53 of the riser 52, so that an annular downcomer space 58 is defined between the riser 52 and the down force mabel 56.
• a deck plate 60 is disposed above the riser 52 and the down force mabel 56 with a predetermined space, and an orifice 61 and a vent 62 are formed.
• the riser 52 includes a resistance plate 92 that is located between the curved portion 54 and the swirl vane 55 and has a two-phase flow passage 91 formed at the center as a liquid film adjusting means. It is fixed.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52, and rises due to the swirl force by the swirl vane 55, due to the difference in the swirl radius according to the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, so that a liquid film is formed in contact with the inner surface of the curved portion 54 outside in the curved direction.
• the resistance plate 92 is fixed on the force to be applied. The growth of the liquid film is suppressed, and the thickness of the liquid film does not increase. That is, although a liquid film is formed on the inner surface of the riser 52, the rise is prevented by the resistance plate 92, and the thickness of the liquid film in the circumferential direction in the vertical portion 53 of the riser 52 is adjusted to be uniform.
• the hot water does not overflow from the down force Mabale 56 and flows into the downcomer space 58 of the appropriate barrel 56.
• the steam rises while swirling above the riser 52, but since the liquid film is not biased, it can It is properly discharged through the chair 61 and above the deck plate 60.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is fixed.
• An annular downcomer space 58 is defined by providing a dunkama barrel 56 on the outside, and a deck plate 60 is disposed with a predetermined space above the riser 52 and down force mabel 56, and an orifice 61 and a vent 62 are provided. Then, a resistance plate 92 having a two-phase flow passage 91 formed at the center is fixed between the curved portion 54 of the riser 52 and the swirl vane 55.
• the two-phase flow of steam and hot water introduced into the riser 52 comes into contact with the inner surface of the bending portion 54 on the outer side in the bending direction, and a liquid film is formed there.
• the rise is blocked, and the thickness of the liquid film in the circumferential direction in the vertical section 53 of the riser 52 is adjusted to be uniform, so that the hot water does not overflow from the orifice 61. While it can flow in and flow down, the steam rises while swirling above the riser 52, but since the liquid film is not biased, it passes through the orifice 61 properly without the water being involved, As a result, the air / water separation performance can be improved.
• the liquid film adjusting means of the present invention is constituted by a resistance plate 92 in which a two-phase flow passage 91 is formed. Accordingly, it is possible to adjust the thickness of the liquid film formed on the inner surface on the outer side in the bending direction of the vertical portion 53 with a simple configuration, and to discharge the two-phase steam rising in the riser 52 to the outside.
• Example 5 that can improve the efficiency of Hanagu's separation process
• FIG. 9 is a schematic view of the essential portions of the steam-water separator according to Embodiment 5 of the present invention.
• symbol is attached
• the riser 52 is configured by connecting the curved portion 54 to the lower portion of the vertical portion 53, and the downward force of the curved portion 54 is also reduced.
• a two-phase flow of steam and hot water can be introduced, and a swirl vane 55 is fixed inside the vertical part 53.
• a down force mable barrel 56 is provided so as to surround the vertical portion 53 of the riser 52.
• an annular downcomer space 58 is defined between the riser 52 and the down force mabel 56.
• a deck plate 60 is disposed above the riser 52 and the down force mabel 56 with a predetermined space, and an orifice 61 and a vent 62 are formed.
• the riser 52 is formed above the swirl vane 55 and is formed with liquid film flow discharge portions 101 and 102 as liquid film adjusting means, inside the bending portion 54 in the bending direction.
• the opening area of the liquid film flow discharge portion 101 located outside the bending portion 54 in the bending direction is set larger than the opening area of the liquid film flow discharge portion 102 positioned.
• the liquid film flow discharge portions 101 and 102 are formed as a plurality of slits 103 and 104 formed horizontally on the upper end portion of the vertical portion 53, and five slits 103 of the liquid film flow discharge portion 101 are provided. And three slits 104 of the liquid film flow discharge unit 102 are provided.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52 and rises, rises due to the swirl force by the swirl vane 55, and depends on the difference in swirl radius according to the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, so that a liquid film is formed in contact with the inner surface of the curved portion 54 outside the curved direction.
• the swirl vane 55 Even after the swirl force is applied by the swirl vane 55, the liquid film thickness grows and rises, but a slit 103 is formed at the upper part of the vertical part 53, and a part of the liquid film flow is Since the liquid is discharged from the slit 103 to the outside, the thickness of the liquid film does not increase.
• a liquid film is formed on the inner surface of the riser 52, slits 103, 104 as the liquid film flow discharge parts 101, 102 are formed in the upper part of the vertical part 53, and the liquid film located on the inner side in the bending direction against the opening area of the flow outlet 102
• the opening area of the liquid film flow discharge portion 101 located on the outer side in the bending direction is set to be large, and a part of the thin liquid film flow formed on the inner side in the bending direction is discharged from the slit 104 and is moved outward in the bending direction.
• the formed thick liquid film flow is mostly discharged from the force slit 103.
• the thickness of the liquid film in the circumferential direction at the upper part of the vertical portion 53 is adjusted to be uniform, and the down force main barrel 58 of the down force maver 56 where the hot water does not overflow from the orifice 61 is properly adjusted. While flowing in and flowing down, the steam rises while swirling above the riser 52, but since the liquid film is not biased, it is properly discharged through the orifice 61 and above the deck plate 60 without involving moisture.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is
• An annular downcomer space 58 is defined by providing a dunkama barrel 56 on the outside, and a deck plate 60 is disposed with a predetermined space above the riser 52 and down force mabel 56, and an orifice 61 and a vent 62 are provided.
• the opening area of the liquid film flow discharge portion 101 located outside the bending direction of the bending portion 54 is set larger than the opening area of the discharge portion 102.
• the two-phase flow of steam and hot water introduced into the riser 52 comes into contact with the inner surface of the bending portion 54 on the outer side in the bending direction, and a liquid film is formed here, and this liquid film grows. Although it rises to the vertical part 53, it is discharged from the force slit 103 of the thick liquid film flow formed on the outside in the bending direction, so the thickness of the liquid film in the circumferential direction at the upper end of the riser 52 is adjusted to be uniform.
• the hot water does not overflow from the orifice 61, it can flow properly into the downcomer space 58 of the down barrel 58, while the steam rises while swirling above the riser 52, but the liquid film Therefore, the water can be properly discharged to the upper side of the deck plate 60 without involving water, and as a result, the air-water separation performance can be improved.
• Fig. 10 is a schematic view of the essential portions of the steam-water separator according to Embodiment 6 of the present invention. Members having the same functions as those described in the above-described embodiments are denoted by the same reference numerals and are duplicated. The description is omitted.
• the riser 52 is configured by connecting the curved portion 54 to the lower portion of the vertical portion 53 and the downward force of the curved portion 54 is also reduced.
• a two-phase flow of steam and hot water can be introduced, and a swirl vane 55 is fixed inside the vertical part 53.
• a down force mabel 56 is provided so as to surround the vertical portion 53 of the riser 52, so that an annular downcomer space 58 is defined between the riser 52 and the down force mabel 56.
• a deck plate 60 is disposed above the riser 52 and the down force mabel 56 with a predetermined space, and an orifice 61 and a vent 62 are formed.
• the center O of the orifice 61 is the bay of the curved portion 54 with respect to the center O of the riser 52.
• the two-phase flow of steam and hot water is introduced from the lower part of the riser 52 and rises, rises due to the swirl force by the swirl vane 55, and depends on the difference in swirl radius according to the mass difference. It is separated into a fluid mainly composed of hot water and a fluid mainly composed of steam.
• the fluid mainly composed of light-mass steam swirls and rises in the riser 52 with a small turning radius around the center axis of the riser 52, and passes above the deck plate 60 through the orifice 61 and the vent 62. Is discharged.
• a fluid mainly composed of heavy hot water rises while swirling in the riser 52 with a larger turning radius than a fluid mainly composed of steam, and rises between the riser 52 and the deck plate 60.
• the clearance force is also introduced into the downcomer space 58 of the downforce Mabale 56.
• the two-phase flow of steam and hot water is introduced into the curved portion 54 of the riser 52, so that a liquid film is formed in contact with the inner surface of the curved portion 54 outside in the curved direction.
• the liquid film thickness grows and rises, but the orifice 61 is eccentric to the inside in the bending direction with respect to the riser 52, and the liquid film flow is There will be no overflow. That is, a liquid film is formed on the inner surface of the riser 52 and grows up above the swirl vane 55, but the deck plate 60 is positioned with respect to the thick liquid film formed on the outer side in the bending direction of the riser 52. Therefore, this liquid film flow is the orifice 61 Without being overflowed, it is guided to the deck plate 60 and is introduced into the downcomer space 58 of the down force mablel 56.
• the swirl vane 55 is fixed inside the riser 52 having the vertical portion 53 and the curved portion 54, and the vertical portion 53 of the riser 52 is
• An annular downcomer space 58 is defined by providing a dunkama barrel 56 on the outer side, a deck plate 60 is disposed with a predetermined space above the riser 52 and the down force mabel 56, and the orifice 61 is placed on the riser 52.
• it is eccentrically provided inside the bending portion 54 in the bending direction.
• the orifice 61 is eccentrically provided on the inner side in the bending direction of the bending portion 54 with respect to the riser 52.
• this configuration may be applied to the first to fifth embodiments described above. ,.
• the steam-water separator of the present invention has been described as being applied to a steam-water separator provided in a steam generator of a pressurized water reactor, but the present invention is limited to this field. It may be applied to a steam separator used in other fields.
• the steam-water separator according to the present invention improves the steam-water separation performance by equalizing the thickness of the liquid film formed in the steam-water riser pipe and preventing the overflow of the liquid film flow. It can be applied to any kind of steam separator.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Separation By Low-Temperature Treatments (AREA)

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• 2006
  • 2006-02-28 JP JP2006053631A patent/JP4599319B2/ja not_active Expired - Lifetime
• 2007
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  • 2007-02-20 CA CA2618719A patent/CA2618719C/en active Active
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