JP4865577B2 - Moisture separator - Google Patents

Description

  The present invention relates to a moisture separator that removes moisture from steam, and is particularly suitable for application to a nuclear power plant or the like.

  For example, in a pressurized water nuclear power plant, light water is used as a reactor coolant and a neutron moderator in a nuclear reactor, and is converted into high-temperature and high-pressure water that does not boil over the entire core. Steam is generated by exchange, and the steam is sent to a turbine generator to generate electricity. And this pressurized water reactor transmits the heat | fever of high temperature high pressure primary cooling water to secondary cooling water via a steam generator, and generates water vapor | steam with secondary cooling water. In addition, the steam generator is configured such that 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, and this steam is supplied to the turbine generator. .

  On the other hand, this turbine generator includes a steam turbine having a high-pressure turbine and a low-pressure turbine, and a generator that generates electric power from the output of the steam turbine. In this case, a moisture separator is generally provided between the high-pressure turbine and the low-pressure turbine. The moisture separator separates moisture contained in the low-pressure steam discharged from the high-pressure turbine, and reheats the low-pressure steam to supply it to the low-pressure turbine as superheated steam. Is reduced to prevent erosion and to improve the thermal efficiency of the turbine plant.

  FIG. 11 is a schematic view showing a conventional moisture separator, and FIG. 12 is a cross-sectional view of a main part of the conventional moisture separator.

  In the conventional moisture separator, as shown in FIGS. 11 and 12, a cylindrical body 001 has a heating pipe 002 inserted from one end and two manifolds 003 from below the heating pipe 002. It is inserted on both sides. The heating pipe 002 is supplied with high-pressure heating steam from the steam generator, while each manifold 003 is supplied with low-temperature reheat steam containing moisture from the high-pressure turbine and formed on the side. Steam can be blown into the body 001 from a number of outlets 004.

  A horizontal partition bottom plate 005 is fixed to the lower part of the fuselage so that a drain passage 006 is defined below it. A drain outlet 007 is formed in the fuselage 001 to discharge the drain (moisture) of the drain passage 006. ing. On the partition bottom plate 005, a pair of left and right moisture separation elements 008 are fixed to the manifolds 003, respectively. The moisture separation element 008 is configured to be supported by upper and lower support frames 008b and 008c in a state where a large number of corrugated separator vanes 008a are stacked at a predetermined interval, and a drain slit 008d is formed in the lower support frame 008c. ing.

  A pair of left and right partitioning side plates 009 is fixed to the upper part of each moisture separation element 008. Above the pair of partitioning side plates 009, the above-described heating tube 002 is located. A steam outlet 010 for discharging steam from which moisture has been separated is formed in the body 001 located above the pipe 002. Note that the high-temperature reheat steam discharged from the steam outlet 010 is sent to the low-pressure turbine.

  Therefore, the low-temperature reheat steam from the high-pressure turbine is blown out from the large number of outlets 004 into the body 001 through each manifold 003 and is introduced into each moisture separation element 008 while being guided by the inner wall surface. Then, when the vapor passes through the moisture separation element 008, the moisture is separated by colliding with the separator vane 008a. And the vapor | steam from which moisture was isolate | separated goes up between a pair of right-and-left partition side plates 009, is heated by contacting a heating pipe, is discharged | emitted from the vapor | steam exit 010 as high temperature reheated steam. On the other hand, the moisture separated by the moisture separation element 008 flows down to the drain passage 006 through the drain slit 008d and is discharged to the outside from the drain outlet 007.

  Examples of such a moisture separator include those described in Patent Documents 1, 2, and 3 below.

JP 2002-130609 A Japanese Utility Model Publication No. 04-082505 JP 2000-310401 A

  In the conventional moisture separator described above, the low-temperature reheated steam passes through the manifold 003 and is blown into the fuselage 001 from a number of outlets 004, and moisture is separated from the steam when passing through the moisture separating element 008. The The steam from which moisture has been separated rises and is discharged from the steam outlet 010, while the separated moisture flows down to the drain passage 006 through the drain slit 008d and is discharged to the outside from the drain outlet 007. Is done. In this case, the moisture separation element 008 is supported by the support frames 008b and 008c in a state where a large number of separator vanes 008a are stacked, and the drain slit 008d is formed in the lower portion. A stagnation portion is formed inside. Then, the steam introduced into the laminated separator vane 008a becomes a vortex in this stagnation part, and the discharge of moisture (drain) from the drain slit 008d is hindered, and the drain discharge performance is deteriorated. There is a problem that the moisture separation performance of steam is lowered.

  Further, in the moisture separator described above, it is desired to make the apparatus compact. To that end, it is necessary to reduce the diameter of the body and the manifold. In the conventional moisture separator described above, the low-temperature reheated steam passes through the manifold 003 and is blown into the fuselage 001 from a number of outlets 004, and moisture is separated from the steam when passing through the moisture separating element 008. The In this case, if the diameter of the manifold 003 is reduced, the flow velocity of the steam flowing in the manifold 003 increases, and the steam blown from the outlet 004 collides with the partition wall on the front end side of the body 001 and recovers the static pressure. A pressure distribution is generated in the body 001. That is, the pressure in the body 001 is low on the base end side of the manifold 003 and is high on the front end side.

  When a pressure difference occurs in the manifold 003 in this way, the pressure in the drain passage 006 is governed by the high pressure on the distal end side of the manifold 003, and thus the pressure on the proximal end side in the manifold 003 becomes low. Then, the steam in the drain passage 006 blows up to the moisture separation element 008 side from the drain slit 008d with drain (moisture), and the separated moisture cannot be discharged into the drain passage 006. There is a problem in that the vapor separated from the water takes away the drain blown up from the drain slit 008d, and the moisture separation performance in the moisture separation element 008 deteriorates.

  The present invention solves the above-mentioned problems, and a moisture separator that improves moisture separation performance by suppressing moisture retention in the moisture separation element and improving moisture discharge performance. The purpose is to provide.

In order to achieve the above object, a moisture separator according to claim 1 of the present invention is provided with a hollow body, a steam inlet for introducing steam containing moisture into the body, and an interior of the body. A moisture separation element that separates moisture when the steam supplied from the steam inlet passes, and exhausts the moisture separated by the moisture separation element provided at the upper part of the body. A steam outlet; a drain passage provided at a lower portion of the body and temporarily storing moisture separated from the steam by the moisture separation element; and a communication opening communicating the moisture separation element and the drain passage And a moisture separator having a drain outlet for discharging moisture stored in the drain passage, the moisture separated from the steam on both sides in the steam passage direction in the moisture separation element A guide member for guiding the passage opening, the first partition wall is provided through the moisture separating element partitioning the drain passage and the vapor flow space to flow to the steam outlet, the moisture in the first partition wall A drain flow passage is provided for allowing moisture separated by the separation element to flow to the drain passage through the communication opening, and moisture in the drain passage blows to the steam flow space side through the drain flow passage. Blow-up suppressing means for suppressing the rising is provided, and the moisture separation element is configured by arranging a plurality of elements in a straight line, a header is fixed to the element, the element and the header Is communicated by the communication opening, and the drain passage and the header are communicated by the drain flow passage, and the blow-up suppression is performed in the drain flow passage. A loop seal as a step is provided, and the element is formed by laminating a plurality of corrugated separator vanes at predetermined intervals, and the separator vanes in the laminated state are supported by an upper support frame and a lower support frame, and the guide The member is arranged to fill a corner portion of the lower support frame formed by an end portion of the separator vane .

In the moisture separator according to a second aspect of the present invention, a plurality of the communication openings are provided along the horizontal direction of the lower support frame.

The moisture separator according to a third aspect of the present invention is characterized in that the guide member is provided in a region without the communication opening.

The moisture separator according to a fourth aspect of the present invention is characterized in that the drain flow passage is divided into a plurality of passages by a partition plate, and the communication openings are provided corresponding to the plurality of passages.

In the moisture separator according to the fifth aspect of the invention, the loop seal includes a flow channel that passes through the first partition wall below the moisture separation element, and an end of the flow channel on the drain channel side. It has the U-shaped flow path provided in.

In a moisture separator according to a sixth aspect of the present invention, a gas vent hole that communicates the moisture separation element and the drain passage is provided above the communication opening.

The moisture separator according to a seventh aspect of the invention is characterized in that the blowing suppression means is provided for the drain flow passage located in the vicinity of the steam inlet.

In the moisture separator according to the invention of claim 8, the body has a horizontal cylindrical shape, the steam inlet is formed at one end in the longitudinal direction, and two manifolds communicating with the steam inlet are inserted therein, A plurality of outlets for blowing steam into the fuselage at the side of the manifold, the steam flow space and the drain passage are partitioned by fixing the first partition wall at the lower part of the fuselage; The moisture separation elements are respectively provided on the first partition wall corresponding to the two manifolds, and the steam blown from the outlets of the manifolds passes through the moisture separation elements so as to be wet. The moisture is removed, and the steam from which moisture has been removed flows to the steam outlet, while the moisture is guided from the drain flow passage through the drain passage to the drain outlet.

In the moisture separator according to the ninth aspect of the present invention, a heating pipe is inserted above the manifold from the other end in the longitudinal direction of the body, and the moisture separation element is used as a boundary on both sides of the body. A steam supply space and a steam discharge space are partitioned by fixing the second partition wall, moisture is removed by passing through each of the moisture separation elements, and steam is transferred from the steam discharge space to the heating pipe. After being contacted and heated, it flows to the steam outlet.

  According to the moisture separator of the first aspect of the invention, a steam inlet for introducing steam containing moisture is provided in the hollow body, and the steam supplied from the steam inlet passes through the body. A moisture separation element for separating moisture is provided, and a steam outlet is provided at the top of the fuselage to discharge the steam separated by the moisture separation element, while the moisture separation element is disposed at the bottom of the fuselage. Providing a drain passage for temporarily storing moisture separated from the fluid, connecting the moisture separation element and the drain passage by a communication opening, and providing a drain outlet for discharging the moisture stored in the drain passage; Guide members for guiding moisture separated from the steam to the communication opening are provided on both sides of the moisture separation element in the steam passage direction.

  Therefore, the steam introduced into the fuselage through the steam inlet is separated from the steam while the moisture is separated by passing through the moisture separation element, and the steam from which the moisture has been separated is discharged from the steam outlet. Moisture moves to the drain passage through the communication opening, is temporarily stored, and is discharged from the drain outlet. At this time, the moisture separated from the steam in the moisture separation element is the guide member. As a result, the moisture is properly guided to the communication opening, moisture retention in the moisture separation element is suppressed, and the moisture separation performance can be improved by improving the moisture discharge performance.

According to the moisture separator of the first aspect of the present invention, the first partition wall that partitions the drain passage and the steam flow space that flows through the moisture separation element and flows to the steam outlet is provided, and the first partition wall A drain flow passage is provided to allow moisture separated by the moisture separation element to flow to the drain passage through the communication opening, and moisture in the drain passage is prevented from blowing up to the steam flow space side through the drain flow passage. When the moisture moves from the drain flow passage to the drain passage and is discharged from the drain outlet, a steam pressure distribution is generated in the steam flow space, and the steam flow space, the drain passage, Even if a pressure difference occurs during this time, the phenomenon that the moisture in the drain passage blows up to the steam flow space side through the drain flow passage is suppressed by the blow-up suppressing means, and the drain passage The moisture backflow into the moisture separating element side from can be improved to moisture separator performance suppressed.

According to the moisture separator of the first aspect of the invention, the moisture separation element is configured by arranging a plurality of elements in a straight line, and a header is fixed to each element. The drain passage and the header are communicated by the drain flow passage, and a loop seal is provided as a blow-up suppression means in the drain flow passage. Back flow of moisture to the separation element side can be suppressed.

According to the moisture separator of the first aspect of the invention, the element is formed by laminating a plurality of corrugated separator vanes at predetermined intervals, and the separator vanes in the laminated state are supported by the upper support frame and the lower support frame. Since the guide member is arranged so as to fill the corner portion of the lower support frame formed by the end portion of the separator vane, the corner portion of the lower support frame is filled by the guide member. The generation of vortices is suppressed, and the moisture discharge performance can be improved.

According to the moisture separator of the second aspect of the present invention, since the plurality of communication openings are provided along the horizontal direction of the lower support frame, the moisture separated from the steam in the moisture separation element is appropriately prevented by the guide member. It is guided to the communication opening and moves from the plurality of communication openings to the drain passage, so that retention of moisture in the moisture separation element is suppressed, and moisture discharge performance can be improved.

According to the moisture separator of the invention of claim 3 , since the guide member is provided in the region without the communication opening, the guide member properly guides the communication opening and moves from the communication opening to the drain passage. Even when the flow rate of the water is reduced, retention of moisture in the moisture separation element is suppressed, and the moisture discharge performance can be improved.

According to the moisture separator of the fourth aspect of the present invention, the drain flow passage is divided into a plurality of passages by the partition plate, and the communication openings are provided corresponding to the plurality of passages. The separated moisture is appropriately guided to the communication opening by the guide member, and moves from the communication opening to the drain passage for each passage, so that moisture retention in the moisture separation element is suppressed and moisture is discharged. By improving the performance, it is possible to improve the moisture separation performance.

According to the moisture separator of the fifth aspect of the present invention, the loop seal is provided at the flow channel that passes through the first partition wall below the moisture separation element and at the drain channel side end of the flow channel. Since the U-shaped flow path is provided, the moisture separated by the moisture separation element moves from the downstream flow path to the drain path through the U-shaped flow path, and this U-shaped flow path is stored here. By constituting the loop seal with the moisture to be applied, the blow up of the moisture can be appropriately suppressed by the loop seal.

According to the moisture separator of the sixth aspect of the invention, since the gas vent hole for communicating the moisture separation element and the drain passage is provided above the communication opening, when a pressure gradient is generated in the flow channel, By releasing the internal pressure from the degassing hole, the internal pressure can be maintained uniformly, and the moisture blow-up can be suppressed by the moisture scattering prevention wall immediately after startup.

According to the moisture separator of the seventh aspect of the invention, since the blow-up suppressing means is provided for the drain flow passage located in the vicinity of the steam inlet, the steam containing moisture is introduced from the steam inlet into the body. In the fuselage, a pressure distribution is likely to occur between the vicinity of the steam inlet and the back part due to the flow velocity of the steam, and in this case, the pressure difference between the steam flow space and the drain passage near the steam inlet. Therefore, the blowing up of moisture can be appropriately suppressed by the blowing up suppressing means.

According to the moisture separator of the eighth aspect of the invention, the body is formed in a horizontally placed cylindrical shape, a steam inlet is formed at one end in the longitudinal direction, two manifolds communicating with the steam inlet are inserted inside, and the manifold A plurality of steam outlets are provided on the side, and the first partition wall is fixed to the lower part of the fuselage to partition the steam flow space and the drain passage, and moisture on the first partition wall corresponding to the two manifolds. Each separation element is provided, and the steam blown out from the outlet of each manifold is passed through each moisture separation element to remove moisture, and the moisture-removed steam flows to the steam outlet while moisture is removed. Is led from the drain flow passage to the drain outlet through the drain passage, so that the steam can be efficiently flowed into the body to appropriately separate the moisture.

According to the moisture separator of the ninth aspect of the present invention, the heating pipe is inserted above each manifold from the other end in the longitudinal direction of the body, and the moisture separation element is bounded on both sides of the body. After the partition wall is fixed, the steam supply space and the steam discharge space are partitioned, the moisture is removed by passing through each moisture separation element, and the steam comes into contact with the heating pipe from the steam discharge space and is heated. Since it flows to the steam outlet, it is possible to effectively use the steam by heating the steam from which moisture has been separated and then discharging it.

  Exemplary embodiments of a moisture separator according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  1 is a cross-sectional view of a main part on the steam inlet side representing a moisture separator according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. FIG. 4 is a schematic cross-sectional view of the drain outlet side representing the moisture separator according to the first embodiment, and FIG. 5 is a schematic diagram illustrating the moisture separator according to the first embodiment. 6 is a longitudinal sectional view showing the moisture separator according to the first embodiment, FIG. 7 is a cutaway perspective view showing the internal structure of the moisture separator according to the first embodiment, and FIG. 8 is a moisture separator according to the first embodiment. It is a schematic block diagram of the power plant to which is applied.

  The power plant of the embodiment uses, for example, light water as a reactor coolant and a neutron moderator, and generates high-temperature and high-pressure water that does not boil over the entire core, and sends this high-temperature and high-pressure water to a steam generator to generate steam by heat exchange. It can be applied to a pressurized water reactor (PWR) that sends this steam to a turbine generator to generate electricity, or an improved pressurized water reactor (APWR) that improves this. It can also be applied to other power plants.

  That is, in the power plant of the present embodiment, as shown in FIG. 8, the steam generator 11 is connected to the steam turbine 12 via the cooling water pipe 13, and the steam turbine 12 includes the high-pressure turbine 14 and the low-pressure turbine. 15 and a generator 16 is connected. A moisture separator 17 is provided between the high-pressure turbine 14 and the low-pressure turbine 15, and the high-pressure turbine 14 and the moisture separator 17 are connected by a low-temperature reheat pipe 18. The low pressure turbine 15 is connected by a high temperature reheat pipe 19. Further, the steam turbine 12 has a condenser 20 and is connected to the steam generator 11 via a cooling water pipe 21, and a condensate pump 22 is provided in the cooling water pipe 21. .

  Accordingly, the steam generated by exchanging heat with high-pressure and high-temperature light water in the steam generator 11 is sent to the steam turbine 12 (from the high-pressure turbine 14 to the low-pressure turbine 15) through the cooling water pipe 13, and the steam is generated by the steam. The turbine 12 is driven to generate power by the generator 16. In this case, after the steam from the steam generator 11 drives the high-pressure turbine 14, moisture contained in the steam is removed and heated by the moisture separator 17, and then the low-pressure turbine 15 is driven. The steam that has driven the steam turbine 12 is cooled by the condenser 20 and then returned to the steam generator 11 through the cooling water pipe 21.

  In the moisture separator 17 of the above-described embodiment, as shown in FIGS. 5 to 7, the body 40 has a horizontal hollow cylindrical shape, one end is closed, and the other end includes moisture. A steam inlet 41 for introducing steam (low-temperature reheated steam) is formed, and a steam outlet 42 for discharging steam (high-temperature reheated steam) separated from moisture is formed at the upper part, while a lower part is formed. A drain outlet 43 for discharging moisture (drain) separated from the steam is formed. As shown in FIG. 8, the steam inlet 41 is connected to the high-pressure turbine 14 via the low-temperature reheat pipe 18, and the steam outlet 42 is connected to the low-pressure turbine 15 via the high-temperature reheat pipe 19, and the drain outlet 43 Is connected to a drain tank via a drain pipe (not shown).

  As shown in FIGS. 5 to 7, the body 40 has a heating tube group 44 inserted through one end in the longitudinal direction thereof. The heating tube group 44 includes a steam chamber 45 located outside the body 40, and a plurality of U-shaped heating tubes 46 extending from the steam chamber 45 into the body 40. The plurality of heating tubes 46 are supported by a pair of partition walls 47 fixed inside the body 40 and a plurality of support walls 48 fixed therebetween. The steam chamber 45 is divided into upper and lower parts, and a pipe branched from the cooling water pipe 13 of the steam generator 11 is connected to an upper inlet nozzle 45a to which one ends of the plurality of heating pipes 46 are connected. On the other hand, a drain pipe extending to the drain tank is connected to a lower outlet nozzle 45b to which the other ends of the plurality of heating pipes 46 are connected.

  Further, the body 40 is positioned on both sides below the heating tube group 44 from the other end in the longitudinal direction, and a pair of left and right manifolds 49 are inserted therethrough. The manifold 49 penetrates through the plurality of support walls 48, and the tip is fixed to one partition wall 47 and closed. The manifold 49 is fixed to the other partition wall 47 and penetrates the manifold 49 and communicates with the steam inlet 41. The manifold 49 is formed with a plurality of outlets 50 through which steam is blown into the body 40 on the side facing the wall surface of the body 40.

  A horizontal first support plate 51 is fixed to the lower part of the body 40, and a pair of left and right moisture separation elements 53 are provided on both sides of the first support plate 51 corresponding to the two manifolds 49. Yes. The moisture separation element 53 is positioned to face each outlet 50 of the manifold 49, and can separate moisture when steam passes therethrough. That is, the moisture separation element 53 is configured to be supported by the upper and lower support frames 55 and 56 in a state where a large number of corrugated separator vanes 54 are stacked at a predetermined interval. In the present embodiment, the lower support frame 56 is integrally fixed to both side portions of the first support plate 51 and is fixed to the inner wall surface of the body 40, so that a drain passage 52 is defined. The drain outlet 43 described above is provided below 52. That is, the first support plate 51 and the lower support frame 56 constitute the first partition wall of the present invention.

A pair of left and right second support plates 57 are erected on the upper portion of each moisture separation element 53 and extend upward so as to bend along both sides of the heating tube group 44, and the upper end portion is connected to the body 40. On the other hand, the lower end portion is connected to the upper support frame 55. Therefore, the steam blown from the outlet 50 of the manifold 49 passes through the moisture separation element 53 in the internal space of the body 40 by the first partition wall constituted by the first support plate 51 and the lower support frame 56 described above. Thus, the steam flow space S ₁ flowing to the steam outlet 42 and the drain passage 52 for guiding the moisture separated by the moisture separation element 53 to the drain outlet 43 are partitioned. The steam flow space S ₁ is a steam supply space in which the steam blown from the outlet 50 flows to the moisture separation element 53 by the second support plate 57 and the upper support frame 55 with the moisture separation element 53 as a boundary. It is partitioned into S ₂₁ and a steam discharge space S ₂₂ in which the steam whose moisture has been separated by the moisture separating element 53 flows to the steam outlet 42. That is, the second support plate 57 and the upper support frame 55 constitute the second partition wall of the present invention.

Incidentally, the moisture separating elements 53 described above has been arranged along the longitudinal direction of the fuselage 40 at the steam inlet 41 side of the manifold 49, the maintenance space S ₃ 2 two moisture separating elements 53a, 53b It is divided into areas. Each moisture separation element 53a, 53b is supported by a plurality of jack bolts 58 interposed therebetween.

The moisture separation element 53 is configured by arranging a plurality of elements in a straight line along the longitudinal direction of the body 40. In each of these elements, as shown in FIGS. 1 to 3, a plurality of corrugated separator vanes 54 are stacked at a predetermined interval and supported by upper and lower support frames 55, 56. As the steam blown from the air passes between the plurality of separator vanes 54, the moisture contained in the steam collides and is separated. Lower support frame 56 (the first partition wall) has a vertical wall portion 56a erected on the steam supply space S ₂₁ side, and a vertical wall portion 56b erected to the steam discharging space S ₂₂ side. Then, as shown in detail in FIG. 4, a drain opening (drain) that connects the moisture separation element 53 b (steam flow space S ₁ ) and the drain passage 52 at the moisture separation element 53 b located on the drain outlet 43 side. A flow passage) 59 is formed, and moisture separated by the separator vane 54, that is, drain, can be discharged to the drain passage 52 through the drain opening 59 and temporarily stored.

On the other hand, at the moisture separation element 53a located on the steam inlet 41 side, as shown in detail in FIGS. 1 to 3, the moisture in the drain passage 52 flows through the drain opening 59 due to the pressure fluctuation in the body 40. A loop seal 60 is provided as blow-up restraining means for restraining blow-up to the space S ₁ side. In this case, as shown in FIGS. 5 and 6, when a pressure fluctuation occurs in the longitudinal direction in the body 40, the pressure of the steam flow space S ₁ is increased in the drain passage 52 on the steam inlet 41 side of the manifold 49. The phenomenon that the pressure is lower than the pressure becomes prominent, and moisture in the drain passage 52 may blow up to the steam flow space S ₁ side through the drain opening 59. Therefore, the moisture separating element 53 is located in the steam inlet 41 side of the manifold 49, i.e., in the region A in which one of the moisture separating elements 53a divided are arranged by the maintenance space S _3, FIGS. 1 to 3 As shown, a loop seal 60 is provided.

That is, in the moisture separating elements 53a at the end of the first support plate 51, the vertical wall portion 56b of the steam discharging space S ₂₂ side in the lower support frame 56, the Hakogata horizontal shape on the first supporting plate 51 The formed header 61 is fixed, and a communication opening 62 is formed in the vertical wall portion 56 a corresponding to the header 61. In addition, a duct 63 is provided at a lower portion of the header 61 so as to penetrate the first support plate 51, and a storage portion 64 that opens upward at the lower end portion is formed while the upper end portion communicates with the header 61. A gas vent hole 65 is formed in the storage portion 64. The header 71 and the duct 73 provide a flow path P ₁ that penetrates the first support plate 51 below the moisture separation element 53a (steam discharge space S ₂₂ ) as a drain flow path. The storage part 74 provides a U-shaped flow path P ₂ at the end of the flow-down flow path P _{1 on} the drain passage 52 side, and the flow-down flow path P ₁ and the U-shaped flow path P ₂ constitute a loop seal 60. Yes.

Further, in the moisture separating element 53a, the vertical wall portion 56b corresponding to Heda 61, positioned above the communication opening 62 and the gas vent holes 66 are formed, the upper end portion of the flow downstream path P ₃ is It communicates with the moisture separation element 53a.

  The above-described header 61 is intended to secure a smooth flow of drain by securing a space for storing gas at the top of the box shape. In other words, a sufficiently high gas space is secured in the upper part of the box shape, and a uniform gas space is ensured in the longitudinal direction of the fuselage 40 in the header 61 by providing a gas vent hole 66. Thus, the drain backflow at the communication opening 62 is suppressed. Further, at the start of operation of the moisture separator 17, until the drain is accumulated in the storage portion 64, the gas in the storage portion 64 is drawn into the gas storage space so that the drain can easily flow from the communication opening 62. is there.

  If the height of the header 61 is not sufficiently high, the drain closes the gas vent hole 66 in the header 61 and the pressure in the header 61 increases, so that the flow of drain flowing down in the duct 63 is disturbed. Become. Further, it also becomes a cause of hindering smooth inflow of drainage from the communication opening 62.

  Further, the communication openings 62 are arranged at regular intervals between the pair of partition walls 47 in the longitudinal direction of the body 40, and the header 61 is provided in a range where the communication openings 62 are disposed in the longitudinal direction of the body 40. The duct 63 does not need to be provided over the entire length of the header 61 in the longitudinal direction. It is desirable to install one header 61 at a position corresponding to the plurality of communication openings 62. If a wide duct 63 is provided in the longitudinal direction of the body 40, a drain liquid gradient is provided in the duct 63 in the longitudinal direction, the seal height becomes non-uniform, and steam with moisture (drain) is discharged to the drain passage 52. It is because it becomes easy to blow up to the header 61 side via the duct 63 from the side.

Further, in the moisture separating element 53a, the vertical wall portion 56b erected to the steam discharging space S ₂₂ side in the lower support frame 56, a plurality (in this embodiment, three) communication opening 62 is the bottom support It is formed along the horizontal direction of the frame 56. In the lower support frame 56, the moisture separated from the steam is guided to the respective communication openings 62 on both sides in the direction of passage of the steam in the moisture separating element 53a (the arrow direction in FIG. 2). As a member, a vortex prevention block 67 is provided. The vortex prevention block 67 has a triangular cross-sectional shape, and is arranged up to a predetermined height in a region without the communication opening 62 so as to fill the corner of the lower support frame 56 formed by the end of the separator vane 54. The vortex prevention block 67 has an inclined guide surface 67 a that introduces moisture in the lower support frame 56 into the communication opening 62.

  Here, the operation of moisture separation by the moisture separator 17 of the present embodiment will be described in detail with reference to FIGS.

  In the moisture separation by the moisture separator 17 of the present embodiment, as shown in FIG. 8, the heated steam generated by the steam generator 11 is sent to the high-pressure turbine 14 constituting the steam turbine 12 through the cooling water pipe 13. And sent to the moisture separator 17. Then, the low-temperature reheat steam that has driven the high-pressure turbine 14 is sent to the moisture separator 17 through the low-temperature reheat pipe 18, where moisture contained in the steam is removed and heated to become high-temperature reheat steam. And sent to the low-pressure turbine 15 through the high-temperature reheat pipe 19.

  In the moisture separator 17, as shown in FIGS. 5 to 7, the heating steam generated by the steam generator 11 is supplied from the inlet nozzle 45 a of the steam chamber 45 to the heating tube group 44, and enters the body 40. The steam is returned to the steam chamber 45 through the plurality of heating pipes 46 and is discharged as drainage from the outlet nozzle 45b.

On the other hand, the low-temperature reheated steam from the high-pressure turbine is supplied from each steam inlet 41 into the manifold 49 and blown out from the numerous outlets 50 to the steam supply space S _{21 of the} body 40. The steam blown into the steam supply space S ₂₁ of the body 40 is guided to each moisture separation element 53 along the inner wall surface. Then, in the moisture separation element 53, the steam passes between the plurality of separator vanes 54 having a waveform, and moisture contained in the steam collides with the separator vanes 54, thereby forming a drain. To be separated.

The steam from which moisture has been separated by the moisture separation element 53 rises through the steam discharge space S ₂₂ defined by the left and right second support plates 57 and passes between the plurality of heating tubes 46. In addition, it is heated by the heating steam passing through each heating pipe 46, becomes high-temperature reheated steam, and is discharged from the steam outlet 42. On the other hand, the moisture (drain) separated from the steam by the moisture separation element 53 flows down to the drain passage 52 through the drain opening 59 and is discharged to the outside from the drain outlet 43 as shown in FIG.

  By the way, in the moisture separator 17 of the present embodiment, the body 40 and the manifold 49 are reduced in diameter in order to make the apparatus compact, and the flow velocity of the steam flowing in the manifold 49 is increased. Since the steam blown from 50 collides with the partition wall 47 on the tip end side of the manifold 49, that is, on the steam chamber 45 side (left side in FIG. 5), the static pressure is recovered. Arise. Then, in the longitudinal direction of the body 40, the pressure on the front end side through which a large amount of steam flows is higher than the pressure on the steam inlet 41 side of the manifold 49, and this pressure acts on the drain passage 52 through a number of drain openings 59. . Therefore, on the steam inlet 41 side of the manifold 49 in the body 40, the steam in the drain passage 52 on the high pressure side blows up from the drain opening 59 to the moisture separation element 53 side on the low pressure side along with moisture (drain). As a result, the moisture separation performance of the moisture separation element 53 is lowered.

However, in this embodiment, as shown in FIGS. 1 and 2, in the vapor inlet 41 side to the moisture separating element 53a of the manifold 49 in the body 40, the flow downstream path P ₁ and the U-shaped flow path P ₂ A configured loop seal 60 is provided. Therefore, the moisture separating element 53a located to the steam inlet 41 side of the manifold 49, since there is no drain opening 59, flows down the drain passage 52 through the flow downstream path P ₁ and the U-shaped flow path P _2, drain outlet 43 is discharged to the outside. That is, the moisture (drain) separated from the steam by the moisture separation element 53 a located on the steam inlet 41 side of the manifold 49 flows from the communication opening 62 to the downstream flow path P ₁ in the header 61 and the duct 63. After being temporarily stored in the storage part 64 below from the downstream flow path P _1, it flows down from the opening part of the storage part 64 to the drain passage 52 and is discharged to the outside from the drain outlet 43. At this time, the U-shaped flow path P ₂ in the duct 63 and the reservoir 64, the loop seal 50 is formed, blow-up suppression means is constituted in this embodiment.

Therefore, the pressure distribution is generated by the steam blown from the respective outlets 50 of the manifold 49 to the body 40, and the steam in the drain passage 52 moves toward the moisture separation element 53 a on the steam inlet 41 side of the manifold 49 in the body 40. even if blow throw its hat, the blow up the moisture separating elements 53a side through the U-shaped flow path P ₂ and flows down passage P ₁ is difficult, blow-up of the steam accompanied by moisture is prevented, A decrease in moisture separation performance by the moisture separation element 53a is suppressed. Then, the moisture separated from the steam by the moisture separation element 53a flows down from the communication opening 72 to the drain passage 52 through the downstream flow path P ₁ and the U-shaped flow path P ₂ , and is appropriately supplied from the drain outlet 43. To be discharged. In this case, by forming a loop seal in the U-shaped flow path P ₂ , the steam in the drain passage 52 blows up to the moisture separation element 53 side through the U-shaped flow path P ₂ and the downstream flow path P _1. Is prevented, and a decrease in moisture separation performance by the moisture separation element 53a is suppressed.

Moreover, until the drain accumulates in reservoir 64, can not be formed a loop seal U-shaped flow path P _2, the steam of the drain passage 52 through the U-shaped flow path P ₂ and flows down passage P ₁ There is a risk of blowing up to the moisture separation element 53 side. However, in this embodiment, the gas vent hole 66 that communicates with the moisture separating elements 53a to Heda 61 located above the flow downstream path P ₁ is formed. Therefore, even if the vapor in the drain passage 52 rises through the U-shaped flow path P ₂ and the flow-down flow path P ₁ , the moisture is supplied again to the moisture separation element 53a and separated again. Further, by opening the pressure inside the Heda 61 by the gas vent holes 66 can be always uniformly maintaining the pressure of the U-shaped flow path P ₂ and flows down passage P _1.

Further, in the present embodiment, moisture separated from the steam is guided to the communication opening 62 at the left and right corners in the lower support frame 56 by the moisture separation element 53 a on the steam inlet 41 side of the manifold 49 in the body 40. A vortex prevention block 67 is provided and has a shape without a stagnation part. Therefore, when the steam blown out from each air outlet 50 to the steam supply space S ₂₁ of the manifold 49, passing through the moisture separating element 53a, by steam impinging on the separators vane 54, moisture contained in the drain And flows down into the lower support frame 56, flows through the communication openings 62, and flows into the flow-down flow path P ₁ in the header 61 and the duct 63. At this time, the drain in the lower support frame 56 is introduced into the communication opening 62 while being guided by the inclined surfaces 67 a of the left and right vortex prevention blocks 67, and vortices are generated at the corners in the lower support frame 56. it is suppressed, without drainage staying flows properly to the flow-down passage P ₁ from passing opening 62.

Thus, in the moisture separator 17 of the first embodiment, the heating tube group 44 is inserted from one end in the longitudinal direction of the body 40, and the steam inlet 41 for the low temperature reheat steam is provided at the other end. A manifold 49 communicating with the steam inlet 41 is provided, a plurality of steam outlets 50 are provided on the side of the manifold 49, and the first support plate 51 and the lower support frame 56 are fixed to the lower part of the body 40. The steam flow space S ₁ and the drain passage 52 are partitioned, a moisture separation element 53 is provided corresponding to the manifold 49, and the steam from which moisture has been removed by the moisture separation element 53 is heated by the heating tube group 44. While flowing as high-temperature reheated steam to the steam outlet 42, the moisture separation element 53 b on the drain outlet 43 side discharges moisture from the drain opening 59 to the drain passage 52, and the moisture separation element on the steam inlet 41 side. In cement 53a, it constitutes a moisture from a stream of channel P ₁ and U-shaped flow path P ₂ to discharge to the drain passage 52 is provided with a loop seal 60 in a U-shaped flow path P _2.

Accordingly, the steam containing moisture introduced into the body 40 from the outlet 50 of the manifold 49 is separated by passing through the moisture separation element 53, and the steam from which the moisture has been separated is heated. While being discharged from the steam outlet 42, the moisture flows down from the drain opening 59, the downstream flow path P ₁ and the U-shaped flow path P ₂ to the drain passage 52 and is discharged from the drain outlet 43. At this time, the pressure distribution of the steam generated in the steam drift space S ₁ of the body 40, the pressure difference is even occurs, the steam inlet 41 side of the moisture separator between the vapor flow space S ₁ and the drain passage 52 In the element 53a, since the loop seal 60 is provided, it is possible to suppress the back flow of steam accompanied by moisture from the drain passage 52 to the moisture separation element 53a, and to improve the moisture separation performance. Can do.

That is, the steam containing moisture introduced into the body 40 from the outlet 50 of the manifold 49 is separated by passing through the moisture separation element 53, and the steam from which the moisture has been separated is heated. While being discharged from the steam outlet 42, the moisture flows down from the drain opening 59 to the drain passage 52 and is discharged from the drain outlet 43. In this case, the moisture separating elements 53a in the steam inlet 41 side of the manifold 49, since there is no drain opening 59, the moisture flows down from the flow downstream path P ₁ and the U-shaped flow path P ₂ to the drain passage 52 It is discharged from the drain outlet 43. Therefore, the pressure distribution of the steam generated in the steam drift space S ₁ of the fuselage 40, as a pressure difference between the vapor flow space S ₁ and the drain passage 52 has occurred, the loop seal U-shaped flow path P ₂ Since 60 is formed, it is possible to suppress the backflow of steam accompanied by moisture from the drain passage 52 to the moisture separation element 53, and it is possible to improve the moisture separation performance. Further, the separated moisture is discharged from the communication opening 62 to the drain passage 52 through the downstream flow path P ₁ and the U-shaped flow path P ₂ , and stays in the moisture separation element 53a to become moisture. The separation performance is not degraded.

Further, a downstream flow path P ₁ and a U-shaped flow path P ₂ for discharging the moisture separated by the moisture separation element 53 a to the drain passage 52 are provided on the steam discharge space S ₂₂ side from the moisture separation element 53 a. Therefore, by ensuring a sufficient height from the first support plate 51 to the inner wall surface of the body 40, the height of the drain stored in the storage portion 64 can be secured, and the U-shaped flow from the drain passage 52 can be ensured. It is possible to reliably prevent the reverse flow of the steam blown to the moisture separation element 53 side through the path P ₂ and the downstream flow path P ₁ .

Furthermore, in the steam inlet 41 side of the moisture separating element 53a of the manifold 49 is provided with a gas vent hole 67 that communicates with the moisture separating elements 53a above the flow downstream path P _1. Accordingly, when the operation of the moisture separator 17 is started, the loop seal 60 is not formed, and the steam in the drain passage 52 passes through the U-shaped flow path P ₂ and the flow-down flow path P ₁ and the moisture from the gas vent hole 66. It will be returned to the separation element 53a, and moisture can be again separated from the steam for processing. At this time, the pressures in the downstream flow path P ₁ and the U-shaped flow path P ₂ are also released, so that U The pressures of the character flow path P ₂ and the flow-down flow path P ₁ can be always kept uniform.

In the moisture separator 17 of the present embodiment, moisture separated from the steam at the left and right corners in the lower support frame 56 by the moisture separation element 53a on the steam inlet 41 side of the manifold 49 in the body 40. Is provided with a vortex prevention block 67 that leads to the communication opening 62. Accordingly, the vortex prevention block 67 makes the lower support frame 56 free from stagnation, and moisture separated from the steam by the moisture separation element 53a flows down into the lower support frame 56 as a drain and passes through the communication opening 62. When flowing into the downstream flow path P ₁ , the drain in the lower support frame 56 is introduced into the communication opening 62 while being guided by the inclined surfaces 67 a of the left and right vortex prevention blocks 67. Occurrence of vortices at the corners is suppressed, and the drain does not stay and appropriately flows from the communication opening 62 to the downstream flow path P ₁ , so that drain discharge performance can be improved.

  Further, in the present embodiment, the body 40 has a horizontal cylindrical shape, and two manifolds 49 are disposed therein, and two moisture separation elements 53 are disposed corresponding to the manifolds 49, so A heating tube group 44 is disposed above each manifold 49, and moisture is removed by passing the low temperature reheat steam blown from the outlet 50 of each manifold 49 through each moisture separation element 53. The steam from which the components have been removed is heated and then flowed to the steam outlet 42, while moisture is led from the drain opening 59 through the drain passage 52 to the drain outlet 43. Therefore, the steam can be efficiently flowed into the body 40 to appropriately separate the moisture, and the steam from which the moisture has been separated is heated and then discharged to effectively use the steam. it can.

  FIG. 9 is a horizontal sectional view on the steam inlet side showing a moisture separator according to Embodiment 2 of the present invention. The overall configuration of the moisture separator of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIGS. 1 and 3 to 8 and the same as that described in this embodiment. The members having the above functions are denoted by the same reference numerals and redundant description is omitted.

In Example 2, as shown in FIG. 1 and FIGS. 5 to 9, the moisture separator 17 forms a steam inlet 41 at one end of the body 40 and forms a steam outlet 42 at the upper part, while at the lower part. A drain outlet 43 is formed, a heating tube group 44 is inserted from one end of the body 40, two manifolds 49 are inserted inside the heating tube group 44, and a first support plate 51 is formed in the lower part of the body 40. And the steam flow space S ₁ and the drain passage 52 are partitioned by fixing the lower support frame 56, and a moisture separation element 53 is provided corresponding to the outlet 50 of each manifold 49, and each moisture separation element 53 is provided. in that the second support plate 57 on top of the upper supporting frame 55 is erected, the vapor flow space S ₁ by an upper supporting frame 55 the second support plate 57 and the steam supply space S ₂₁ and the steam discharging space S ₂₂ It is divided and configured.

  In this moisture separation element 53, a plurality of corrugated separator vanes 54 are laminated at a predetermined interval and supported by upper and lower support frames 55 and 56, and on the drain outlet 43 side, as shown in FIG. A drain opening 59 that allows the moisture separation element 53 b and the drain passage 52 to communicate with each other is formed in the lower support frame 56, and moisture separated by the separator vane 54 can be discharged to the drain passage 52 through the drain opening 59. .

On the other hand, in the moisture separation element 53 a located on the steam inlet 41 side of the manifold 49, no drain opening is formed in the lower support frame 56. Then, in the moisture separating element 53a, as a drain flow path, and flow-down passage P ₁ passing through the first support plate 51 below the moisture separating element 53a (steam discharging space S _22), the flow downstream path P ₁ And a U-shaped flow path P ₂ provided at an end portion on the drain passage 52 side in which a loop seal 60 is provided.

That is, as shown in FIGS. 1 and 9, the moisture separation element 53 a at the end of the first support plate 51 has a first wall on the vertical wall 56 b on the steam discharge space S ₂₂ side in the lower support frame 56. A box-shaped horizontal header 61 is fixed on the support plate 51, and a communication opening 71 is formed in the vertical wall portion 56 a corresponding to the header 61. In addition, a duct 63 that penetrates the first support plate 51 is provided at the lower portion of the header 61, and a storage portion 64 that has an upper end communicating with the header 61 and opens upward at the lower end portion is formed. 64 is formed with a vent hole 65. Then, while the falling flow path P ₁ by Heda 61 and the duct 63 is constituted by a duct 63 and reservoir 64 is constituted by the U-shaped flow path P _2, the loop seal 60 is provided in the U-shaped flow path P ₂ Yes. Further, the vertical wall portion 56b corresponding to Heda 61, positioned above the communication opening 71 and the gas vent holes 66 are formed in communication with the flow downstream path upper end moisture separating elements in 53a of P ₃ ing.

  Further, in the moisture separation element 53a, the communication opening 71 formed in the vertical wall portion 56b of the lower support frame 56 is formed over almost the entire region in the width direction of the vertical wall portion 56b. And in this lower support frame 56, the vortex prevention which guide | induces the moisture isolate | separated from the vapor | steam to the communicating opening 71 on the both sides in the passage direction (arrow direction in FIG. 9) of the vapor | steam in the moisture separation element 53a. A block 67 is provided. The vortex prevention block 67 is disposed in a region without the communication opening 71 so as to fill the corner of the lower support frame 56 formed by the end of the separator vane 54, and the inclined guide surface 67 a of the vortex prevention block 67. Is positioned to be continuous with the end face of the communication opening 71.

Therefore, the steam supplied into the body 40 passes through the moisture separation element 53a, and moisture contained in the steam is separated as a drain. Then, the moisture vapor which is separated by moisture separating elements 53a, rises through the steam discharging space S _22, is heated as it passes between the plurality of heat pipes 46, and a high temperature reheat steam It is discharged from the steam outlet 42. Meanwhile, moisture separated from the steam in moisture separating elements 53a, flows from the communicating opening 71 to flow down channel P ₁ of Heda 61 and the duct 63 becomes drain, reservoir from the flow-down passage P ₁ below After being temporarily stored in the portion 64, it flows down from the opening of the storage portion 64 to the drain passage 52 and is discharged from the drain outlet 43 to the outside.

At this time, a pressure distribution is generated by the steam blown out from each outlet 50 of the manifold 49 to the body 40, and the steam in the drain passage 52 is on the moisture separation element 53 side on the steam inlet 41 side of the manifold 49 in the body 40. to even if blow throw its hat, since the loop seal 60 into a U-channel P ₂ is provided, on the U-shaped flow path P ₂ and flows down passage moisture separating element 53a side steam through the P ₁ It is difficult to blow up, steam blowing up with moisture is prevented, and a decrease in moisture separation performance by the moisture separation element 53a is suppressed. Then, the moisture separated from the steam by the moisture separation element 53 flows down from the communication opening 71 to the drain passage 52 through the downstream flow path P ₁ and the U-shaped flow path P ₂ , and is appropriately supplied from the drain outlet 43. To be discharged.

Further, in the moisture separation element 53a, the communication opening 71 formed in the vertical wall portion 56b of the lower support frame 56 is formed over almost the entire region in the width direction, and moisture separated from the steam is formed on both sides thereof. Is provided with a vortex prevention block 67 that leads to the communication opening 71 and has no stagnation portion. Therefore, when the steam blown out from each air outlet 50 to the steam supply space S ₂₁ of the manifold 49, passing through the moisture separating element 53a, by steam impinging on the separators vane 54, moisture contained in the drain And flows down into the lower support frame 56, flows through the communication opening 71, and flows into the flow path P ₁ in the header 61 and the duct 63. At this time, the drain in the lower support frame 56 is reliably introduced into the communication opening 71 while being guided by the inclined surfaces 67 a of the left and right vortex prevention blocks 67, and vortices are generated at the corners in the lower support frame 56. it is suppressed that occurs without drainage stagnates, properly flows to flow down passage P ₁ from the communicating opening 71.

As described above, in the moisture separator 17 according to the second embodiment, the moisture separating element 53a on the steam inlet 41 side of the manifold 49 flows through the first support plate 51 below the moisture separating element 53a. A lower flow path P ₁ and a U-shaped flow path P ₂ positioned at the end of the flow-down flow path P _{1 on} the drain passage 52 side are provided, and a loop seal 60 is provided in the U-shaped flow path P _2. Is formed over substantially the entire width direction of the vertical wall portion 56 b, and a vortex prevention block 67 that guides moisture separated from the vapor to the communication opening 71 is provided at the left and right corners in the lower support frame 56.

Accordingly, the moisture separation element 53a is formed on the steam inlet 41 side of the manifold 49 in the body 40, and the lower support frame 56 has no stagnation portion by the vortex prevention block 67, and is separated from the steam by the moisture separation element 53a. When the wet moisture flows down into the lower support frame 56 as drain and flows through the communication opening 71 into the flow-down flow path P ₁ , the drain in the lower support frame 56 is applied to the inclined surfaces 67 a of the left and right vortex prevention blocks 67. It is introduced into the communication opening 71 while being guided, and the generation of vortices at the corners in the lower support frame 56 is suppressed, and the drainage does not stay and the flow from the communication opening 71 to the flow channel P ₁ properly. It will flow and drain drainage performance can be improved.

  FIG. 10 is a horizontal sectional view on the steam inlet side showing a moisture separator according to Embodiment 3 of the present invention. The overall configuration of the moisture separator of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIGS. 1 and 3 to 8 and the same as that described in this embodiment. The members having the above functions are denoted by the same reference numerals and redundant description is omitted.

In the second embodiment, as shown in FIGS. 1 and 10, in the moisture separation element 53 a located on the steam inlet 41 side of the manifold 49, the vertical wall portion 56 b on the steam discharge space S ₂₂ side in the lower support frame 56 has A box-shaped horizontal header 61 is fixed on the first support plate 51, and a communication opening 62 is formed in the vertical wall portion 56 a corresponding to the header 61. In addition, a duct 63 that penetrates the first support plate 51 is provided at the lower portion of the header 61, and a storage portion 64 that has an upper end communicating with the header 61 and opens upward at the lower end portion is formed. 64 is formed with a vent hole 65. Then, while the falling flow path P ₁ by Heda 61 and the duct 63 is constituted by a duct 63 and reservoir 64 is constituted by the U-shaped flow path P _2, the loop seal 60 is provided in the U-shaped flow path P ₂ Yes. Further, the vertical wall portion 56b corresponding to Heda 61, positioned above the communication opening 62 and the gas vent holes 66 are formed in communication with the flow downstream path upper end moisture separating elements in 53a of P ₃ ing.

Further, in the moisture separating elements 53a, opposite the three communication opening 62 formed in the vertical wall 56b of the lower support frame 56, it flows down passage P ₁ and U-shaped flow by three Heda 61 and the duct 63 A path P ₂ is formed, and is configured as a drain flow path divided by a partition wall 81. And in this lower support frame 56, the vortex prevention which guide | induces the moisture isolate | separated from the vapor | steam to the communicating opening 71 on the both sides in the passage direction (arrow direction in FIG. 10) of the vapor | steam in the moisture separation element 53a. A block 67 is provided. The vortex prevention block 67 is disposed in a region without the communication opening 62 so as to fill the corner of the lower support frame 56 formed by the end of the separator vane 54, and the inclined guide surface 67 a of the vortex prevention block 67. Is positioned to be continuous with the end face of the communication opening 62.

Therefore, the steam supplied into the body 40 passes through the moisture separation element 53a, and moisture contained in the steam is separated as a drain. Then, the moisture vapor which is separated by moisture separating elements 53a, rises through the steam discharging space S _22, is heated as it passes between the plurality of heat pipes 46, and a high temperature reheat steam It is discharged from the steam outlet 42. Meanwhile, moisture separated from the steam in moisture separating elements 53a, flows from the communicating opening 62 to flow down channel P ₁ of Heda 61 and the duct 63 becomes drain, reservoir from the flow-down passage P ₁ below After being temporarily stored in the portion 64, it flows down from the opening of the storage portion 64 to the drain passage 52 and is discharged from the drain outlet 43 to the outside.

At this time, a pressure distribution is generated by the steam blown out from each outlet 50 of the manifold 49 to the body 40, and the steam in the drain passage 52 is on the moisture separation element 53 side on the steam inlet 41 side of the manifold 49 in the body 40. to even if blow throw its hat, since the loop seal 60 into a U-channel P ₂ is provided, on the U-shaped flow path P ₂ and flows down passage moisture separating element 53a side steam through the P ₁ It is difficult to blow up, steam blowing up with moisture is prevented, and a decrease in moisture separation performance by the moisture separation element 53a is suppressed. Then, the moisture separated from the steam by the moisture separation element 53 flows down from the communication opening 62 to the drain passage 52 through the flow-down flow path P ₁ and the U-shaped flow path P _2. To be discharged.

Further, in the moisture separating element 53a, the communication opening 62 formed in the vertical wall 56b of the lower support frame 56 is formed corresponding to the flow downstream path P ₁ and the U-shaped flow path P _2, and the partition A vortex prevention block 67 that guides moisture separated from the steam to the communication opening 62 is provided on both sides of the plate 81 and has a shape without any stagnation. Therefore, when the steam blown out from each air outlet 50 to the steam supply space S ₂₁ of the manifold 49, passing through the moisture separating element 53a, by steam impinging on the separators vane 54, moisture contained in the drain And flows down into the lower support frame 56, flows through the communication openings 62, and flows into the flow-down channels P ₁ . At this time, the drain in the lower support frame 56 is reliably introduced into the communication opening 62 while being guided by the inclined surfaces 67 a of the left and right vortex prevention blocks 67, and vortices are generated at the corners in the lower support frame 56. it is suppressed that occurs without drainage stagnates, properly flows to flow down passage P ₁ from the communicating opening 62.

Thus, in the moisture separator 17 according to the third embodiment, the moisture separating element 53a on the steam inlet 41 side of the manifold 49 flows through the first support plate 51 below the moisture separating element 53a. A lower flow path P ₁ and a U-shaped flow path P ₂ positioned at the end of the flow-down flow path P _{1 on} the drain passage 52 side are provided, and a loop seal 60 is provided in the U-shaped flow path P _2. A downstream flow path P ₁ and a U-shaped flow path P ₂ are provided corresponding to 62, divided by the partition plate 81, and moisture separated from the vapor is guided to the communication opening 62 at the left and right corners in the lower support frame 56. A vortex prevention block 67 is provided.

Accordingly, the moisture separation element 53a is formed on the steam inlet 41 side of the manifold 49 in the body 40, and the lower support frame 56 has no stagnation portion by the vortex prevention block 67, and is separated from the steam by the moisture separation element 53a. When the wet moisture flows down into the lower support frame 56 as drain and flows into the corresponding flow-down flow path P ₁ through each communication opening 62, the drain in the lower support frame 56 is inclined to the left and right vortex prevention blocks 67. It is introduced into the communication opening 62 while being guided by the surface 67a, and vortices are prevented from being generated at the corners in the lower support frame 56, and drainage does not stay. will flow to P _1, it is possible to improve the drainage performance.

  In each of the above-described embodiments, the first support plate 51 and the lower support frame 56 constitute a first partition wall, the moisture separation element 53 is connected to the first support plate 51, and a drain opening as a drain flow passage is formed. However, the drain opening 59 may be formed in the first support plate 51 according to the support structure of the moisture separation element 53 with respect to the first support plate 51. Further, in each of the embodiments described above, the loop seal 60 as the blow-up suppressing means of the present invention is provided for the moisture separation element 53a located in the region A on the steam inlet 41 side of the manifold 49, but the drain opening 59 may be eliminated, and the loop seal 60 may be provided in all regions where the moisture separation element 53b is provided.

  In each of the embodiments described above, the moisture separator of the present invention has been described as a moisture separator. However, a moisture separator that does not have the heating tube group 44 in the body 40 may be used. Further, in each of the above-described embodiments, the moisture separator of the present invention is inserted through the two manifolds 49 from one end of the body 40, and the steam inlet 41 for the steam is formed at the base end of the manifold 49. Although the blower outlet 50 is formed in the part, it is not limited to this structure. For example, a steam inlet for steam may be formed at the lower part of the middle position in the longitudinal direction of the fuselage, and a moisture separation element may be provided at the upper part. Even in this case, the diameter of the fuselage can be reduced. As a result, the flow velocity of the steam flowing through the fuselage increases, and the steam collides with the back side of the fuselage and recovers the static pressure. It is conceivable that the steam in the passage blows up to the moisture separation element side with moisture (drain), and the present invention is effective.

  The moisture separator according to the present invention is designed to improve moisture separation performance by suppressing moisture retention in the moisture separation element and improving moisture discharge performance. Can be applied to moisture separator.

It is principal part sectional drawing showing the moisture separator which concerns on Example 1 of this invention. It is II-II sectional drawing of FIG. FIG. 3 is a schematic diagram illustrating a header in the moisture separator according to the first embodiment. It is principal part sectional drawing on the drain exit side showing the moisture separator of Example 1. FIG. 1 is a schematic diagram illustrating a moisture separator according to Example 1. FIG. 1 is a longitudinal sectional view illustrating a moisture separator according to Example 1. FIG. It is a notch perspective view showing the internal structure of the moisture separator of Example 1. FIG. It is a schematic block diagram of the power plant to which the moisture separator of Example 1 was applied. It is a horizontal sectional view by the side of a steam inlet showing a moisture separator concerning Example 2 of the present invention. It is a horizontal sectional view by the side of the steam inlet showing the moisture separator concerning Example 3 of the present invention. It is the schematic showing the conventional moisture separator. It is principal part sectional drawing of the conventional moisture separator.

Explanation of symbols

11 Steam Generator 12 Steam Turbine 13 Cooling Water Pipe 14 High Pressure Turbine 15 Low Pressure Turbine 16 Generator 17 Moisture Separator 40 Body 41 Steam Inlet 42 Steam Outlet 43 Drain Outlet 44 Heating Tube Group 46 Heating Tube 49 Manifold 50 Outlet 51 First 1 support plate (first partition wall)
52 Drain passage 53, 53a, 53b Moisture separation element 55 Upper support frame 56 Lower support frame 57 Second support plate 59 Drain opening (drain flow passage)
60 Loop seal (Blow-up suppression means)
61 Header 62, 71 Communication opening 63 Duct 64 Reservoir 65 Gas vent hole 66 Gas vent hole 81 Partition plate P ₁ Down flow passage (drain flow passage)
P ₂ U-shaped flow path (drain flow passage)
S ₁ steam flow space S ₂₁ steam supply space S ₂₂ steam discharge space

Claims (9)

A body having a hollow shape, a steam inlet for introducing steam containing moisture into the body, and steam supplied from the steam inlet provided in the body to separate moisture. A moisture separation element, a steam outlet provided at an upper portion of the body and discharging steam from which moisture has been separated by the moisture separation element; and a moisture outlet provided at a lower portion of the body and from the steam by the moisture separation element. A moisture comprising a drain passage for temporarily storing the separated moisture, a communication opening for communicating the moisture separation element and the drain passage, and a drain outlet for discharging the moisture stored in the drain passage. In the separator, a guide member that guides moisture separated from the steam to the communication opening is provided on both sides of the moisture separation element in the passage direction of the steam ,
A steam flow space that flows through the moisture separation element and flows to the steam outlet and a first partition wall that partitions the drain passage are provided, and the moisture separated by the moisture separation element on the first partition wall Is provided with a drain flow passage through which the moisture flows from the drain passage to the steam flow space side through the drain flow passage. Is provided,
The moisture separation element includes a plurality of elements arranged in a straight line, a header is fixed to the element, and the element and the header communicate with each other through the communication opening. The header communicates with the drain flow passage, and the drain flow passage is provided with a loop seal as the blow-up suppressing means,
The element is formed by laminating a plurality of corrugated separator vanes at a predetermined interval, and the separator vanes in the laminated state are supported by an upper support frame and a lower support frame, and the guide member is an end portion of the separator vane. It arrange | positions so that the corner part of the said lower support frame formed by may be filled, The moisture separator characterized by the above-mentioned . The moisture separator according to claim 1 , wherein a plurality of the communication openings are provided along a horizontal direction of the lower support frame. The moisture separator according to claim 1 , wherein the guide member is provided in a region without the communication opening. The moisture separator according to claim 1 , wherein the drain flow passage is divided into a plurality of passages by a partition plate, and the communication opening is provided corresponding to the plurality of passages. vessel. The moisture separator according to any one of claims 1 to 4 , wherein the loop seal includes a flow channel that passes through the first partition wall below the moisture separation element, and a flow channel in the flow channel. A moisture separator having a U-shaped channel provided at an end portion on the drain passage side. 6. The moisture separator according to claim 5 , wherein a gas vent hole for communicating the moisture separation element and the drain passage is provided above the communication opening. The moisture separator according to any one of claims 1 to 6 , wherein the blowing suppression means is provided for the drain flow passage located in the vicinity of the steam inlet. Separator. The moisture separator according to any one of claims 1 to 7 , wherein the body has a horizontal cylindrical shape, the steam inlet is formed at one end in a longitudinal direction, and communicates with the steam inlet inside. Two manifolds are inserted, and have a plurality of outlets for blowing steam into the fuselage at the side of the manifold, and the first partition wall is fixed to the lower part of the fuselage, so that the steam flow space and The drain passage is partitioned, the moisture separation elements are provided on the first partition wall corresponding to the two manifolds, and the steam blown from the outlets of the manifolds is separated from the moistures. Moisture is removed by passing through the element, and the steam from which moisture has been removed flows to the steam outlet, while moisture is guided from the drain flow passage through the drain passage to the drain outlet. Moisture separator characterized and. 9. The moisture separator according to claim 8 , wherein a heating pipe is inserted above the manifold from the other end in the longitudinal direction of the body, and the moisture separation element is defined as a boundary on both sides of the body. A steam supply space and a steam discharge space are partitioned by fixing the second partition wall, moisture is removed by passing through each of the moisture separation elements, and steam is transferred from the steam discharge space to the heating pipe. A moisture separator, wherein the moisture separator flows after contacting and heating to the steam outlet.

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