JP2008128079A - Moisture separator and straightening mechanism of manifold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moisture separator and a straightening mechanism of a manifold, capable of securing excellent workability, while restraining reduction in moisture separating performance. <P>SOLUTION: This moisture separator has a body formed in a cylindrical shape, a steam inlet introducing steam including the moisture in the axial direction of the body inside the body, the manifold 49 arranged in parallel to the axial direction inside the body, having the base end communicating with the steam inlet and having the closed tip, a plurality of blowout ports 50 formed at a predetermined interval in the axial direction in a side part of the manifold 49 and capable of blowing off the steam from the manifold 49, a moisture separating element separating the moisture by passing the steam, a steam outlet discharging the steam of separating the moisture by the moisture separating element to an external part of the body in the direction crossing with the axial direction, and a straightening means 70 having a plurality of holes 70a straightening the steam introduced from the steam inlet and arranged in the manifold 49. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a moisture separator that removes moisture from steam and a rectifying mechanism for the manifold, and more particularly to a moisture separator and a rectifying mechanism for the manifold that are suitable for application to nuclear power plants and the like. is there.

  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. There is one that generates steam by exchange and sends the steam 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. This moisture separator separates the 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, so that the outlet wetness of the low-pressure turbine is reduced. Is reduced to prevent erosion and to improve the thermal efficiency of the turbine plant.

  FIG. 12 is a schematic diagram showing a conventional moisture separator. In a conventional moisture separator, as shown in FIG. 12, a cylindrical body 001 has a heating pipe 002 inserted from one end thereof, a steam inlet formed at the other end, and communicated with the steam inlet. Two manifolds 003 are provided on both lower sides of the heating tube 002. The heating pipe 002 is supplied with high-pressure heating steam from a steam generator, while each manifold 003 is supplied with low-temperature reheat steam containing moisture from the high-pressure turbine via a steam inlet, Steam can be blown into the body 001 from a number of outlets 004 formed in the section.

  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. A pair of left and right moisture separation elements 008 are fixed on the partition bottom plate 005 corresponding to each manifold 003 in the radial direction of the body 001. The moisture separation element 008 is configured to be supported by upper and lower support frames in a state where a large number of corrugated separator vanes are stacked at a predetermined interval, and a drain slit is formed in the lower support frame.

  A pair of left and right partitioning side plates are fixed to the upper portion of each moisture separation element 008 in the radial direction of the body 001. Above the pair of partitioning side plates, the heating tube 002 described above is located. In addition, a steam outlet 009 for discharging steam from which moisture has been separated is formed in the body 001 located above the heating pipe 002. The high-temperature reheat steam discharged from the steam outlet 009 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. And the vapor | steam from which moisture was isolate | separated rises through between a pair of right-and-left partition side plates, is heated by contacting the heating pipe 002, and is discharged | emitted from the vapor | steam outlet 009 as high temperature reheated vapor | 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 and is discharged from the drain outlet 007 to the outside.

  Here, in the moisture separator described above, it is desired to make the apparatus compact, and for this purpose, it is necessary to reduce the diameter of the body and the manifold 003. 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 drift may occur in the flow of steam. Then, when a drift occurs in the steam blown out from the outlet 004, a region where the flow velocity of the steam approaching the separator vane is relatively high is partially formed. In a region where the flow rate exceeds the limit flow rate at which the separation performance can be exhibited, that is, the residence time of the vapor in the moisture separation element 008 becomes short and moisture cannot be removed sufficiently, for example, in the region where the flow rate is relatively high. Moisture that is separated from the steam by the separation element 008 and stays in the lower support frame of the separator vane before flowing into the drain passage 006 is blown up by the dynamic pressure of the steam, so that the moisture in the moisture separation element 008 is increased. Separation performance sometimes deteriorated.

  In addition, in order to suppress the bias | inclination of the approaching flow velocity to said separator vane, the moisture separation heater which provided the perforated plate in the side part of the separator vane is disclosed by the following patent document 1. FIG.

Japanese Patent No. 2714264

  By the way, in the moisture separation heater described in the above-mentioned Patent Document 1, it is difficult to construct a perforated plate at the site where the moisture separator is already installed. At the time of replacement, the work had to be done in a short time in an extremely controlled area, which was extremely difficult.

  Therefore, an object of the present invention is to provide a moisture separator and a rectifying mechanism for a manifold that can ensure good workability while suppressing a decrease in moisture separation performance.

  In order to achieve the above object, a moisture separator according to a first aspect of the present invention includes a body formed in a cylindrical shape, and a steam inlet for introducing steam containing moisture into the body in the axial direction of the body. A manifold which is provided in the body in parallel to the axial direction and whose base end communicates with the steam inlet and whose distal end is closed, and a side portion of the manifold at a predetermined interval along the axial direction. A plurality of outlets formed and capable of blowing steam from the manifold; a moisture separation element that separates moisture by the passage of the steam; and the axis of steam separated by the moisture separation element. A moisture separator provided with a steam outlet for discharging to the outside of the body in a direction crossing the direction, the steam being provided in the manifold and rectifying steam introduced from the steam inlet Characterized in that it comprises a rectifying means having a plurality of holes.

  The moisture separator according to a second aspect of the present invention includes an inflow chamber which is provided in the body and communicates with the steam inlet and the manifold and is formed as a region accessible from the outside.

  In the moisture separator according to a third aspect of the present invention, the rectifying means is provided at a predetermined interval with respect to the outlet.

  The moisture separator according to a fourth aspect of the invention is characterized in that the rectifying means is partially formed along the inner surface of the manifold so as to cover the outlet.

  In a moisture separator according to a fifth aspect of the invention, the rectifying means is formed in a cylindrical shape along the inner surface of the manifold.

  The moisture separator according to the invention of claim 6 has a partition portion provided along the passage cross-sectional direction of the manifold and partitioning the manifold with respect to the axial direction and having the plurality of holes formed therein. To do.

  In a moisture separator according to a seventh aspect of the invention, the rectifying means is divided into a plurality of parts in the axial direction.

  In the moisture separator according to an eighth aspect of the invention, the rectifying means is characterized in that the aperture ratios of the plurality of holes are different in the axial direction.

  In a moisture separator according to a ninth aspect of the present invention, a drain passage that is partitioned inside the body and that can store moisture separated from steam by the moisture separation element, the inside of the moisture separation element, and the A drain flow passage communicating with the drain passage, and a drain outlet provided in the trunk so as to communicate with the drain passage and discharging the moisture to the outside of the trunk are provided.

  The moisture separator according to a tenth aspect of the present invention includes a heating pipe that is inserted through the body along the axial direction and that can heat the steam upstream of the steam outlet.

  In order to achieve the above object, the manifold rectifying mechanism of the invention of claim 11 is formed in a cylindrical shape having at least one end opened to allow fluid to be introduced, and a plurality of outlets capable of blowing fluid to the side. And a rectifying means having a plurality of holes for rectifying the fluid introduced from the one end.

  According to the moisture separator of the first aspect of the invention, the steam containing moisture introduced from the steam inlet into the fuselage is blown out from the plurality of outlets through the manifold and passes through the moisture separating element. Then, moisture is separated and then discharged to the outside through the steam outlet. At this time, since the rectifying means having a plurality of holes for rectifying the steam is provided in the manifold, the steam is rectified by passing through the plurality of holes of the rectifying means before being blown out from the plurality of outlets of the manifold. Since the region where the approaching flow velocity to the separator vane is relatively high is suppressed from being partially formed, it is possible to suppress a decrease in moisture separation performance. Further, since the rectifying means is provided in the manifold having the base end opened, the rectifying means can be easily installed in the manifold by inserting the rectifying means so as to be pushed from the base end side toward the distal end side. it can. As a result, good workability can be ensured while suppressing a decrease in moisture separation performance.

  According to the moisture separator of the second aspect of the invention, since the manifold opening is formed facing the inflow chamber provided as an area accessible from the outside, the rectifying means is provided when the apparatus is stopped due to maintenance or the like. Even in the case of replacement, the rectifying means can be easily replaced from the inflow chamber side.

  According to the moisture separator of the invention of claim 3, the rectifying means is provided at a predetermined interval with respect to the plurality of outlets formed in the manifold, so that the rectifying means does not block the outlet. Since it is possible to secure a large area for blowing steam from the outlet, an increase in the pressure loss of the steam can be suppressed.

  According to the moisture separator of the fourth aspect of the invention, since the rectifying means is partially provided on the inner surface of the manifold so as to cover the outlet, the rectifying means can be reduced in size, and the rectifying means can be attached. It can be carried out more easily and accurately, and can be easily taken in and out of the body during replacement.

  According to the moisture separator of the fifth aspect of the invention, since the rectifying means is formed in a cylindrical shape, the strength of the rectifying means can be ensured appropriately.

  According to the moisture separator of the sixth aspect of the present invention, the rectifying means is provided along the passage cross-sectional direction of the manifold, and the partition portion is partitioned with respect to the axial direction and the partition portion is formed with the plurality of holes. Since it has, the rectification | straightening means can rectify | straighten the vapor | steam which flows through the inside of a manifold by this partition part. Further, the rectifying means is ensured in the radial direction by this partition portion, and is prevented from being deformed in the radial direction. As a result, deformation of the rectifying means during construction of the rectifying means is prevented, so that workability can be improved.

  According to the moisture separator of the seventh aspect of the invention, since the rectifying means is divided into a plurality of parts in the axial direction, one rectifying means can be reduced in size, so that the rectifying means can be attached. It can be carried out more easily and accurately, and can be easily taken in and out of the body during replacement.

  According to the moisture separator of the eighth aspect of the invention, by changing the aperture ratio of the hole in the rectifying means in the axial direction, it becomes possible to rectify according to the distribution of the region where the flow velocity of the steam is increased. Therefore, it is possible to suppress the drift of the steam more effectively, and to suppress the region where the pressure loss of the steam in the hole increases to a minimum, so that the increase of the pressure loss can also be suppressed.

  According to the moisture separator of the ninth aspect of the present invention, the drain passage that is partitioned inside the body and can store the moisture separated from the steam by the moisture separation element, the inside of the moisture separation element, and the drain passage are provided. Drain flow passages that communicate with each other and drain outlets that are provided in the fuselage in communication with the drain passages and that discharge moisture to the outside of the fuselage are provided to remove moisture by passing through each moisture separation element. In addition, the steam from which moisture has been removed flows to the steam outlet, while the moisture is guided from the drain flow path through the drain path to the drain outlet, so that the steam efficiently flows into the fuselage and the moisture is appropriately discharged. Can be separated.

  According to the moisture separator of the tenth aspect of the present invention, since the heating pipe that is inserted through the body along the axial direction and can heat the steam upstream of the steam outlet is provided, each moisture separating element is allowed to pass through. Since the moisture is removed and the steam is brought into contact with the heating tube and heated and then flows to the steam outlet, the steam separated from the moisture is heated and then discharged, so that the steam can be effectively used. .

  According to the manifold straightening mechanism of the eleventh aspect of the present invention, since the straightening means having a plurality of holes for straightening the fluid is provided in the manifold, a plurality of fluids are blown before being blown out from the plurality of outlets of the manifold. Since the current is rectified by passing through the holes, it is possible to suppress the partial formation of a region where the flow velocity is relatively high. Further, since the rectifying means is provided in the manifold having at least one end opened, the rectifying means can be easily installed in the manifold by being inserted so as to be pushed from one end of the manifold toward the other end. As a result, it is possible to ensure good workability while suppressing fluid drift.

  Embodiments of a moisture separator and a manifold rectifying mechanism according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a cutaway perspective view of a manifold and a rectifying mechanism of a moisture separation heater according to Embodiment 1 of the present invention, and FIG. 2 is a schematic cross-section in the axial direction of the moisture separation heater according to Embodiment 1 of the present invention. FIG. 3 is a schematic sectional view in the radial direction of the moisture separation heater according to the first embodiment of the present invention, and FIG. 4 is a notch showing the internal structure of the moisture separation heater according to the first embodiment of the present invention. FIG. 5 is a partial sectional view in the radial direction of the moisture separation heater according to the first embodiment of the present invention, and FIG. 6 is a power generation to which the moisture separation heater according to the first embodiment of the present invention is applied. It is a schematic block diagram of a plant. In this embodiment, the manifold rectifying mechanism of the present invention is applied to a moisture separator.

  As shown in FIG. 6, the power plant 1 to which the moisture separation heater 17 as the moisture separator of the present embodiment is applied uses, for example, light water as a reactor coolant and a neutron moderator, and the entire core. High-pressure high-pressure water that does not boil over, a high-pressure high-pressure water reactor (PWR: Pressurized Water Reactor) that generates steam by sending this high-temperature high-pressure water to a steam generator, and sends this steam to a turbine generator Although this can be applied to an improved pressurized water reactor (APWR) improved in this manner, it can also be applied to other power generation plants of the moisture separation heater 17 of this embodiment.

  The power plant 1 of the present embodiment includes a steam generator 11, a steam turbine 12, and a moisture separation heater 17. The steam generator 11 is connected to the steam turbine 12 via a cooling water pipe 13. The steam turbine 12 has a high-pressure turbine 14 and a low-pressure turbine 15 and is connected to a generator 16. The moisture separation heater 17 is provided between the high-pressure turbine 14 and the low-pressure turbine 15, that is, the high-pressure turbine 14 is connected to the moisture separation heater 17 via the low-temperature reheat pipe 18. On the other hand, the moisture separation heater 17 is connected to the low-pressure turbine 15 via a high-temperature reheat pipe 19. Further, the steam turbine 12 has a condenser 20, and the condenser 20 is connected to the steam generator 11 through a cooling water pipe 21, and the cooling water pipe 21 has a condensate. A pump 22 is provided.

  Therefore, 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 (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, the moisture contained in the steam is removed and heated by the moisture separation heater 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.

  More specifically, as shown in FIGS. 2 to 5, the moisture separation heater 17 includes a body 40 that accommodates each part of the apparatus. The body 40 is formed in a hollow cylindrical shape and is installed horizontally so that the axial direction thereof is the horizontal direction. In the following description, “the axial direction of the body 40” is simply abbreviated as “axial direction”, and “the radial direction of the body 40” is simply referred to as “radial direction” unless otherwise specified. In the present embodiment, the axial direction and radial direction of a pair of manifolds 49 described later coincide with the axial direction and radial direction of the body 40.

  The body 40 is closed at one end with respect to the axial direction, has a steam inlet 41 at the other end, further has a steam outlet 42 at the top in the vertical direction, and has a drain outlet 43 at the bottom in the vertical direction. The The steam inlet 41 is an opening through which moisture containing moisture (low temperature reheat steam) can be introduced into the body 40, and introduces steam from the outside of the body 40 in the axial direction. The steam outlet 42 is an opening through which moisture (heated reheat steam) from which moisture has been separated and heated can be discharged to the outside of the body 40, and the steam is directed in a direction crossing the axial direction, here upward in the vertical direction. Is discharged to the outside of the body 40. That is, the moisture separation heater 17 of the present embodiment is a so-called axial flow type moisture separation heater. The drain outlet 43 is an opening through which moisture (drain) separated from the steam can be discharged, and the moisture is discharged to the outside of the body 40 in the vertical direction. As shown in FIG. 6, 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. 2 to 5, the body 40 has a heating tube group 44 inserted through the axial direction from one end in the axial direction (longitudinal direction). 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.

  An inflow chamber 60 is defined by the inner surface of the fuselage 40 and the partition wall 47 described above on the steam inlet 41 side inside the fuselage 40. The inflow chamber 60 is provided as a space communicating with the steam inlet 41 and having a predetermined volume, and the steam introduced into the body 40 from the outside through the steam inlet 41 flows into the inflow chamber 60 having a large passage section. . The body 40 is positioned on both sides below the heating tube group 44 from the other end in the axial direction, and a pair of left and right manifolds 49 are provided in the radial direction.

  The pair of manifolds 49 are provided in parallel to the axial direction inside the body 40 through the plurality of support walls 48 described above. Each manifold 49 has a proximal end fixed to one partition wall 47 and communicated with the steam inlet 41 via the inflow chamber 60, and a distal end fixed to the other partition wall 47 and closed. The plurality of support walls 48 are formed in a plate shape and are fixed to the inner surface of the body 40 side by side at predetermined intervals along the axial direction. Therefore, each manifold 49 is supported by the body 40 through the plurality of support walls 48. Each manifold 49 is formed with a plurality of air outlets 50 for blowing steam into the body 40 at the side facing the wall surface of the body 40. The plurality of air outlets 50 are formed at predetermined intervals along the axial direction in the side portions of the respective manifolds 49 and can blow out steam from the inside of the respective manifolds 49 downward.

  A horizontal first support plate 51 is fixed to the lower part of the body 40, and a pair of moisture separations on the left and right sides of the radial direction corresponding to the pair of manifolds 49 on both sides of the first support plate 51. An element 53 is provided. That is, the pair of moisture separation elements 53 are provided so as to face each other in the radial direction. 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 includes a plurality of separator vanes 54 that separate moisture by the passage of steam, and a separator vane support frame 55 that supports the plurality of separator vanes 54 side by side in the axial direction. The separator vanes 54 have a corrugated shape, and a large number of separator vanes 54 are stacked at predetermined intervals in the axial direction. The separator vane support frame 55 includes an upper support frame 56 a and a lower support frame 56 b, thereby supporting the separator vane 54 on the first support plate 51. Here, the lower support frame 56b 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 the drain passage 52 is defined. The drain outlet 43 described above is provided below.

  The drain passage 52 is partitioned in the lower part of the body 40 by the first support plate 51 and the lower support frame 56b. In the lower support frame 56 b of the separator vane support frame 55, a drain opening 59 is formed as a drain flow passage that connects the inside of the separator vane support frame 55 and the drain passage 52. The drain passage 52 can store moisture separated from the steam by the moisture separation element 53 and staying on the lower support frame 56 b through the drain opening 59. Further, the drain outlet 43 described above communicates with the drain passage 52. Thereby, the moisture contained in the drain passage 52 is discharged to the outside of the body 40 through the drain outlet 43.

  In addition, a pair of left and right second support plates 57 are erected on the upper side of each moisture separation element 53 with respect to the radial direction. Each second support plate 57 extends upward so as to bend along both sides of the heating tube group 44, and an upper end portion is connected to the body 40, while a lower end portion is an upper support frame of the separator vane support frame 55. 56a.

Therefore, the steam blown out from the outlet 50 of the manifold 49 flows into the steam outlet 42 through the moisture separation element 53 in the internal space of the body 40 by the first support plate 51 and the lower support frame 56b described above. The steam flow space S ₁ and the drain passage 52 that guides the moisture separated by the moisture separation element 53 to the drain outlet 43 are partitioned.

Further, the steam flow space S ₁ is a steam supply space in which steam blown from the outlet 50 flows to the moisture separation element 53 by the second support plate 57 and the upper support frame 56a 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.

More specifically, the steam supply space S ₂₁ is a space provided along the inner surface of the body 40, and a moisture separation element provided with steam blown from the plurality of outlets 50 inside the body 40. 53 can be supplied. Inside the body 40, a pair of left and right steam supply spaces S ₂₁ are provided corresponding to the pair of manifolds 49 in the radial direction. The steam supply space S ₂₁ includes a space sandwiched between support walls 48 adjacent in the axial direction, and a space communicating below the lower end of each support wall 48.

The steam discharge space S ₂₂ is defined between the pair of moisture separation elements 53 and communicates with the steam outlet 42. In the steam discharge space S ₂₂ , the steam that has passed through each moisture separation element 53 and separated from the moisture flows upward in the vertical direction, and can be discharged through the steam outlet 42. The above-mentioned heating tube group 44 is provided along the axial direction in the steam discharge space S ₂₂ , whereby the steam from which moisture has been separated by the moisture separation element 53 can be heated on the upstream side of the steam outlet 42. is there.

Incidentally, the moisture separating elements 53 described above, has been arranged along the axial direction of the body 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.

As shown in FIG. 5, the moisture separating element 53 is formed by laminating a plurality of corrugated separator vanes 54 at predetermined intervals, and is supported by the upper support frame 56a and the lower support frame 56b of the separator vane support frame 55. The steam blown from the outlet 50 of the manifold 49 passes between the plurality of separator vanes 54, so that moisture contained in the steam collides and is separated. On support frame 56a and the lower support frame 56b of the separator vane support frame 55, on the vertical wall portion 56c of each upright on the steam supply space S ₂₁ side, and Shitatatekabe portion 56e, upright steam discharging space S ₂₂ side An upper vertical wall portion 56d and a lower vertical wall portion 56f. That is, the upper support frame 56a and the lower support frame 56b have a U-shaped frame structure. The moisture separated from the steam by the separator vane 54, that is, the drain temporarily stays in the region between the lower vertical wall portion 56e and the lower vertical wall portion 56f on the lower support frame 56b, and the drain opening 59 described above. It is discharged into the drain passage 52 and stored.

The body 40 and the partition wall 47 of the moisture separator 17 are provided with manholes 61 (see FIG. 4) that allow workers to enter and leave the body 40. The steam supply space S ₂₁ , the steam discharge space S _22, and the inflow chamber 60 are formed as regions (accessible regions) where workers can enter from the outside through the manhole 61 (see FIG. 4). For example, it may be used as a maintenance space during periodic inspections of the apparatus.

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

  In the moisture separation by the moisture separation heater 17 of the present embodiment, as shown in FIG. 6, the heated steam generated by the steam generator 11 passes through the cooling water pipe 13 to the high pressure turbine 14 constituting the steam turbine 12. In addition to being sent to the moisture separation heater 17. Then, the low-temperature reheat steam that has driven the high-pressure turbine 14 is sent to the moisture separator / heater 17 through the low-temperature reheat pipe 18, where moisture contained in the steam is removed and heated, and the high-temperature reheat steam is heated. And sent to the low-pressure turbine 15 through the high-temperature reheat pipe 19.

  In the moisture separation heater 17, as shown in FIGS. 2 to 5, 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, Is returned to the steam chamber 45 through a 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 14 flows into the inflow chamber 60 from the steam inlet 41, and then is branched and supplied into the pair of manifolds 49. It is blown out to S _21. 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 the moisture contained in the steam collides with the separator vanes 54 to be separated as drain. The

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.

  By the way, in the moisture separation heater 17 of the present embodiment, the body 40 and the manifold 49 are reduced in diameter in order to make the apparatus compact. In this case, when the diameter of the manifold 49 is reduced, the flow velocity of the steam flowing in the manifold 49 increases, and the steam blown out from each outlet 50 is a partition wall 47 on the front end side (left side in FIG. 2) of the manifold 49. Since there is a static pressure recovery due to collision, there is a risk of drift in the steam flow. When drift occurs in the steam blown out from the outlet 50, a region in which the flow velocity of the steam toward the separator vane 54 is relatively high is partially formed. For example, the flow velocity of the steam is appropriate in the separator vane 54. Exceeding the limit flow rate at which a satisfactory moisture separation performance can be exhibited, that is, in a region where the residence time of the vapor in the moisture separation element 53 is shortened and moisture cannot be removed sufficiently, for example, in a region where the flow rate is relatively high. In the separator vane support frame 55, the moisture temporarily staying in the region between the lower vertical wall portion 56e and the lower vertical wall portion 56f on the lower support frame 56b is blown up by the dynamic pressure of the steam. The moisture separation performance in the separation element 53 may be reduced.

  Therefore, in the moisture separation heater 17 of the present embodiment, as shown in FIGS. 1 and 3, a rectification mechanism 70 as a rectification unit is provided in each manifold 49, thereby suppressing a decrease in moisture separation performance. ing. Furthermore, when such a moisture separator / heater 17 is already installed in the field, for example, when performance is deteriorated due to secular change or parts are replaced due to maintenance, the moisture separator / heater 17 is constructed in a limited management area in a short time. This can be a very difficult task. However, in the moisture separator / heater 17 of the present embodiment, better workability is ensured while suppressing a decrease in moisture separation performance.

  The rectifying mechanism 70 as the rectifying means has a plurality of holes 70 a for rectifying the steam introduced from the steam inlet 41. More specifically, the rectifying mechanism 70 of the present embodiment is formed by a cylindrical perforated plate having a plurality of holes 70a. That is, the rectifying mechanism 70 is formed in a cylindrical shape along the inner surface of the manifold 49 and is arranged so as to be coaxial with the manifold 49.

  The rectifying mechanism 70 is positioned and welded to the inner surface of the manifold 49 with a shim plate at a slight interval. That is, the rectifying mechanism 70 is not provided so as to be in contact with the plurality of air outlets 50 formed in the manifold 49, but is provided at a predetermined interval with respect to the plurality of air outlets 50. The blower outlet 50 is not blocked, and a large area for blowing steam from the blower outlet 50 can be secured.

The moisture separator / heater 17 is configured as described above, so that the steam supplied from the steam inlet 41 into the inflow chamber 60 and then branched into the pair of manifolds 49 is supplied to the manifold 49. Before being blown out from the plurality of air outlets 50, the air is rectified by passing through the plurality of holes 70 a of the rectifying mechanism 70. Thereafter, steam is blown toward a plurality of air outlets 50 to the steam supply space S _21, flowing in the steam supply space S _21.

At this time, the steam flowing in the steam supply space S ₂₁ is rectified by the rectifying mechanism 70 just prior to being blown out from the air outlet 50, from becoming be ejected radially from a plurality of holes 70a, axially The steam flow along the flow, that is, the axial flow is reduced, and the flow velocity distribution of the steam in the moisture separation element 53 is made uniform. Further, by suppressing the uneven flow of the steam, it is possible to suppress the partial formation of a region in which the flow velocity of the steam close to the separator vane 54 is relatively high, and the steam flow velocity has an appropriate moisture content in the separator vane 54. It is prevented that the flow rate exceeds the limit flow rate at which the separation performance can be exhibited. Thereby, the residence time of the vapor in the moisture separation element 53 is sufficiently secured, and the moisture can be appropriately separated from the vapor. Further, since there is no region where the flow velocity of the steam becomes high, moisture staying in the region between the lower vertical wall portion 56e and the lower vertical wall portion 56f on the lower support frame 56b is blown up by the dynamic pressure of the steam. This is also prevented. As a result, a decrease in moisture separation performance in the moisture separation heater 17 can be suppressed. In addition, by preventing steam drift, the separator vanes 54 that are stacked in the axial direction can be used evenly, and therefore, the performance of the separator vanes 54 is prevented from partially deteriorating. Is done.

  Further, as described above, the manifold 49 provided with the rectifying mechanism 70 on the inner side is closed at the distal end, while the proximal end is open. Therefore, the rectifying mechanism 70 is advanced from the proximal end side of the manifold 49 to the distal end. It can be easily installed in the manifold 49 by being inserted so as to be pushed toward the side. Further, for example, when the rectifying mechanism 70 needs to be replaced due to secular change, the base end of the manifold 49 opens to the inflow chamber 60 formed as an accessible area, so that the apparatus can be stopped. An operator can enter the inflow chamber 60 from the outside through the manhole 61 (see FIG. 4), and can easily replace the rectifying mechanism 70 from the inflow chamber 60 side.

  As described above, in the moisture separation heater 17 according to the first embodiment, the body 40 formed in a cylindrical shape, and the steam inlet 41 that introduces steam containing moisture into the body 40 in the axial direction of the body 40. And a manifold 49 provided parallel to the axial direction in the body 40 and having a proximal end communicating with the steam inlet 41 and closed at the distal end, and a side portion of the manifold 49 formed at predetermined intervals along the axial direction. A plurality of outlets 50 through which steam can be blown out from the manifold 49, a moisture separation element 53 that separates moisture by passing through the steam, and an axis of the steam from which moisture has been separated by the moisture separation element 53 A steam outlet 42 that discharges to the outside of the body 40 in a direction crossing the direction, and a plurality of holes 70 a that are provided in the manifold 49 and rectify steam introduced from the steam inlet 41. It comprises a rectifying mechanism 70.

  Therefore, the steam containing moisture introduced into the body 40 from the steam inlet 41 is blown out from the plurality of outlets 50 through the manifold 49, and the moisture is separated by passing through the moisture separation element 53. Then, it is discharged from the steam outlet 42 to the outside. At this time, the steam is rectified by passing through the plurality of holes 70a of the rectifying mechanism 70 before being blown out from the plurality of outlets 50 of the manifold 49, and there is a region where the approaching flow velocity toward the separator vane 54 becomes relatively high. Since partial formation is suppressed, a decrease in moisture separation performance can be suppressed. Further, since the rectifying mechanism 70 is provided in a manifold 49 formed in a cylindrical shape whose base end is open so that steam can be introduced as a fluid, the rectifying mechanism 70 is inserted so as to be pushed from the base end side toward the front end side of the manifold 49. Thus, the rectifying mechanism 70 can be easily installed in the manifold 49. As a result, good workability can be ensured while suppressing a decrease in moisture separation performance.

  Further, the moisture separator / heater 17 according to the first embodiment includes the inflow chamber 60 provided in the body 40 and communicating with the steam inlet 41 and the manifold 49 and formed as an accessible area. Therefore, even when the rectifying mechanism 70 is replaced when the apparatus is stopped due to maintenance or the like, the opening of the manifold 49 is formed facing the inflow chamber 60 provided as an accessible area, so that it is easy from the inflow chamber 60 side. The rectifying mechanism 70 can be replaced.

  Furthermore, in this way, in the moisture separation heater 17 of Example 1, the rectifying mechanism 70 is provided at a predetermined interval with respect to the air outlet 50. Therefore, by providing this rectifying mechanism 70 at a predetermined interval with respect to the plurality of outlets 50 formed in the manifold 49, the rectifying mechanism 70 does not block the outlet 50, and the steam generated by the outlet 50. Since a large blowing area can be secured, an increase in steam pressure loss can be suppressed. As a result, a decrease in turbine efficiency of the low pressure turbine 15 can be suppressed.

  Further, in this way, in the moisture separation heater 17 of the first embodiment, the rectifying mechanism 70 is formed in a cylindrical shape along the inner surface of the manifold 49. Therefore, since the rectifying mechanism 70 is formed in a cylindrical shape, the strength of the rectifying mechanism 70 can be appropriately ensured.

  Furthermore, in the moisture separation heater 17 of the first embodiment as described above, the drain passage 52 that is partitioned inside the body 40 and can store the moisture separated from the steam by the moisture separation element 53, and the moisture A drain opening 59 that connects the inside of the separator vane support frame 55 of the separation element 53 and the drain passage 52, and a drain outlet 43 that is provided in the body 40 so as to communicate with the drain passage 52 and discharges moisture to the outside of the body 40. With. Therefore, moisture is removed by passing through each moisture separation element 53, and the steam from which moisture has been removed flows to the steam outlet 42, while moisture is drained from the drain opening 59 through the drain passage 52 and drain outlet. Therefore, the steam can be efficiently flowed into the body 40 to appropriately separate moisture.

  Furthermore, in this way, the moisture separation heater 17 according to the first embodiment includes the heating tube group 44 that is inserted through the body 40 along the axial direction and can heat the steam upstream of the steam outlet 42. Therefore, the moisture is removed by passing through each moisture separation element 53 and the steam is brought into contact with the heating tube group 44 and heated and then flows to the steam outlet 42. By exhausting from the steam, it is possible to effectively use the steam.

  FIG. 7 is a schematic perspective view of the rectifying mechanism of the moisture separator / heater according to the second embodiment of the present invention. The moisture separator / heater according to the second embodiment has substantially the same configuration as the moisture separator / heater according to the first embodiment, but the moisture separator according to the first embodiment is different in that the rectifying means is divided into a plurality of parts. Different from the heater. In addition, about the structure, effect | action, and effect which are common in Example 1, while overlapping description is abbreviate | omitted as much as possible, the same code | symbol is attached | subjected.

  As shown in FIG. 7, the moisture separation heater 217 as a moisture separator according to the second embodiment includes a rectifying mechanism 270 as a rectifying means having a plurality of holes 270a for rectifying steam. The rectifying mechanism 270 is formed in a cylindrical shape along the inner surface of the manifold 49 by a perforated plate having a plurality of holes 270 a and is arranged to be coaxial with the manifold 49. And the rectification | straightening mechanism 270 of a present Example is divided | segmented into multiple, here three with respect to the axial direction. That is, the rectifying mechanism 270 is formed by three divided rectifying mechanisms 270b arranged in the axial direction.

  Thereby, since one division | segmentation rectification | straightening mechanism 270b can be reduced in size, workability | operativity further improves. As described above, the manifold 49 provided with the rectifying mechanism 270 on the inner side is closed at the front end, and the base end is opened. Therefore, the rectifying mechanism 270 includes one divided rectifying mechanism 270b. By inserting the manifold 49 so as to be pushed in from the proximal end side toward the distal end side and welding the end faces of the adjacent divided rectifying mechanisms 270b to each other, the construction can be easily performed in the manifold 49. Even when the rectifying mechanism 270 is replaced when the apparatus is stopped due to maintenance or the like, since the rectifying mechanism 270 is divided into a plurality of divided rectifying mechanisms 270b and is downsized, the inflow chamber in the fuselage 40 is provided via the manhole 61. 60 can be easily put in and out.

  Thus, in the moisture separation heater 217 of Example 2, the rectifying mechanism 270 is divided into a plurality of parts in the axial direction. Therefore, since the rectifying mechanism 270 is formed by a plurality of divided rectifying mechanisms 270b arranged in the axial direction, one divided rectifying mechanism 270b can be reduced in size, and the rectifying mechanism 270 can be attached more easily and accurately. In addition, it can be easily inserted into and removed from the body 40 during replacement.

  FIG. 8 is a schematic perspective view of the rectification mechanism of the moisture separator / heater according to the third embodiment of the present invention. The moisture separator / heater according to the third embodiment has substantially the same configuration as the moisture separator / heater according to the second embodiment, but the size of the plurality of holes formed in the rectifying means is the moisture according to the second embodiment. Different from the separation heater. In addition, about the structure, effect | action, and effect which are common in Example 2, while omitting the overlapping description as much as possible, the same code | symbol is attached | subjected.

As shown in FIG. 8, the moisture separation heater 317 as a moisture separator according to the third embodiment includes a rectifying mechanism 370 as a rectifying means having a plurality of holes 370a for rectifying steam. The rectifying mechanism 370 is formed in a cylindrical shape along the inner surface of the manifold 49 by a perforated plate having a plurality of holes 370 a and is arranged so as to be coaxial with the manifold 49. The rectifying mechanism 370 is formed by _three divided rectifying mechanisms 370b ₁ , 370b ₂ , and 370b ₃ that are divided into a plurality of, here three, in the axial direction and are arranged in the axial direction.

And the rectification | straightening mechanism 370 of a present Example differs for every part into which the aperture ratio of the some hole 370a was divided | segmented. That is, the alignment mechanism 370, split the alignment mechanism opening ratio of holes 370a ₁ in 370b _1, divided rectifying mechanism opening ratio of holes 370a ₂ in 370b ₂ and split the alignment mechanism 370b aperture ratio aperture ratio of holes 370a ₃ are different in the _three Is set to Here, the opening ratio of the plurality of holes 370a is a ratio of an area through which steam can pass in the rectifying mechanism 370. When this figure increases, the steam easily passes through the rectifying mechanism 370. Is reduced, the pressure loss in the hole 370a increases, and the vapor becomes difficult to pass through the rectifying mechanism 370. In this embodiment, the diameter of the hole 370a ₁ is made larger than the diameter of the hole 370a _{2 and} the diameter of the hole 370a ₃ is made smaller than the diameter of the hole 370a ₂ , so that the holes 370a ₁ , 370a ₂ and 370a ₃ Different opening ratios.

More specifically, in this embodiment, the opening ratio of the hole 370a ₁ in the split rectifying mechanism 370b ₁ located on the base end side of the manifold 49, that is, on the upstream side with respect to the flow direction of the steam is maximized. The aperture ratio of the hole 370a ₃ in the split rectifying mechanism 370b ₃ located on the distal end side, that is, the downstream side with respect to the flow direction of the steam is minimized. That is, as described above, the steam blown from each outlet 50 tends to have a high flow velocity on the front end side (closed end side) of the manifold 49. However, in this embodiment, while the largest aperture ratio of holes 370a ₁ in the divided rectifying mechanism 370b _1, since it has the smallest aperture ratio of the hole 370a ₃ in the divided rectifying mechanism 370b _3, the holes 370a ₃ The decrease in the flow velocity of the steam that passes through and blown out from the outlet 50 is larger than the decrease in the flow velocity of the steam that passes through the hole 370a ₁ and is discharged from the outlet 50, and as a result, the steam drift is more effectively suppressed. can do. Furthermore, by appropriately setting the opening ratio of the plurality of holes 370a according to the region where the flow velocity of the steam tends to be high, the region where the pressure loss of the steam in the hole 370a increases can be minimized. An increase in loss can also be suppressed.

  As described above, in the moisture separation heater 317 according to the third embodiment, the opening ratio of the plurality of holes 370a in the rectifying mechanism 370 is different in the axial direction. Therefore, by making the opening ratio of the hole 370a in the rectifying mechanism 370 different according to the distribution of the region where the flow velocity of the steam increases in the axial direction, the steam drift can be more effectively suppressed and the steam in the hole 370a can be suppressed. Since the region where the pressure loss increases can be minimized, the increase in pressure loss can also be suppressed. For this reason, a decrease in turbine efficiency of the low-pressure turbine 15 can be suppressed.

  FIG. 9 is a cutaway perspective view of a manifold and a rectifying mechanism of a moisture separation heater according to Embodiment 4 of the present invention, and FIG. 10 is a schematic cross-sectional view in the radial direction of the moisture separation heater according to Embodiment 4 of the present invention. FIG. The moisture separation heater according to the fourth embodiment has substantially the same configuration as the moisture separation heater according to the first embodiment, but the shape of the rectifying means is different from that of the moisture separation heater according to the first embodiment. In addition, about the structure, effect | action, and effect which are common in Example 1, while overlapping description is abbreviate | omitted as much as possible, the same code | symbol is attached | subjected.

  As shown in FIGS. 9 and 10, the moisture separation heater 417 as the moisture separator according to the fourth embodiment includes a rectifying mechanism 470 as a rectifying unit having a plurality of holes 470 a for rectifying steam. The rectifying mechanism 470 according to the present embodiment is different from the rectifying mechanism 70 according to the first embodiment (see FIG. 1), and covers the plurality of outlets 50 with a perforated plate having a plurality of holes 470a along the inner surface of the manifold 49. Partly formed. That is, the straightening means of the present invention does not have to be a perfect cylindrical shape. If the plurality of outlets 50 are covered by the inner surface of the manifold 49, the radial cross-sectional shape as in the straightening mechanism 470 of the present embodiment. May be formed in a circular arc shape.

  The moisture separator / heater 417 is configured as described above, so that the steam is rectified by the rectifying mechanism 470 immediately before being blown out from the blowout port 50 and is sprayed radially from the plurality of holes 470a. Therefore, the flow of steam along the axial direction, that is, the axial flow is reduced, the steam flow velocity distribution in the moisture separation element 53 is made uniform, and the moisture separation performance in the moisture separation heater 417 is reduced. Can be suppressed. Further, the rectifying mechanism 470 can be easily installed in the manifold 49 by being pushed in from the proximal end side of the manifold 49 toward the distal end side, and the proximal end of the manifold 49 can be accessed. Since an opening is made in the inflow chamber 60 formed as follows, when the apparatus is stopped, an operator enters the inflow chamber 60 from the outside through the manhole 61 (see FIG. 4) and easily enters from the inflow chamber 60 side. The rectifying mechanism 470 can be replaced.

  Furthermore, since the flow regulating mechanism 470 may be of a size that can cover the plurality of air outlets 50, it can be further reduced in size and workability is further improved. Even when the rectifying mechanism 470 is replaced when the apparatus is stopped due to maintenance or the like, since the rectifying mechanism 470 is downsized, it can be easily put in and out of the inflow chamber 60 in the trunk 40 through the manhole 61. . In addition, since the rectifying mechanism 470 is only partially provided on the inner surface of the manifold 49, it is easy to secure a work space for workers in the manifold 49, so that workability is further improved.

  As described above, in the moisture separator / heater 417 according to the fourth embodiment, the rectifying mechanism 470 is partially formed along the inner surface of the manifold 49 so as to cover the outlet 50. Therefore, since the rectifying mechanism 470 is partially provided on the inner surface of the manifold 49 so as to cover the outlet 50, the rectifying mechanism 470 can be downsized, and the rectifying mechanism 470 can be attached more easily and accurately. In addition, it can be easily put in and out of the body 40 at the time of replacement.

  FIG. 11 is a schematic perspective view of the rectifying mechanism of the moisture separator / heater according to the fifth embodiment of the present invention. The moisture separator / heater according to the fifth embodiment has substantially the same configuration as that of the moisture separator / heater according to the second embodiment, but the moisture separator / heater according to the second embodiment in that the rectifying means includes a partition. Is different. In addition, about the structure, effect | action, and effect which are common in Example 2, while omitting the overlapping description as much as possible, the same code | symbol is attached | subjected.

  As shown in FIG. 11, the moisture separation heater 517 as a moisture separator according to the fifth embodiment includes a rectifying mechanism 570 as a rectifying means having a plurality of holes 570a for rectifying steam. The rectifying mechanism 570 is formed in a cylindrical shape along the inner surface of the manifold 49 by a perforated plate having a plurality of holes 570 a and is arranged so as to be coaxial with the manifold 49. The rectifying mechanism 570 of the present embodiment is divided into a plurality, here three, in the axial direction. That is, the rectifying mechanism 570 is formed by three divided rectifying mechanisms 570b arranged in the axial direction.

  Furthermore, the rectifying mechanism 570 of the present embodiment has a support portion 571 as two partition portions. Each support portion 571 is formed of a perforated plate having a plurality of holes 571a for rectifying steam. In addition, each support portion 571 is formed in a disk shape substantially equal to the passage cross section of the manifold 49. And each support part 571 is provided along the channel | path cross-sectional direction of the manifold 49 between the end surfaces of the adjacent division | segmentation rectification | straightening mechanism 570b. That is, the support part 571 is provided so as to be orthogonal to the axial direction, and partitions the manifold 49 so as to be divided into a plurality of parts in the axial direction.

  As described above, the manifold 49 provided with the rectifying mechanism 570 on the inner side is closed at the front end and is open at the base end. Therefore, the rectifying mechanism 570 is first configured with each of the divided rectifying mechanisms 570b. One surface of the support portion 571 is welded to one end surface, and the other end surface side of the divided rectifying mechanism 570b is inserted so as to be pushed from the base end side to the distal end side of the manifold 49, and then the next divided rectifying mechanism is inserted. The other end surface of 570b is welded to the other surface of the support portion 571 of the split rectification mechanism 570b inserted previously, and the end surfaces of the adjacent split rectification mechanism 570b are welded and connected via this support portion 571. By repeating this, the flow straightening mechanism 570 can be easily installed in the manifold 49. The rectifying mechanism 570 is secured by the support portion 571 in the radial direction and is prevented from being deformed. That is, the roundness of the radial cross section of the rectifying mechanism 570 configured in a cylindrical shape along the inner surface of the manifold 49 is maintained. Further, since the steam flowing in the manifold 49 is rectified by the plurality of holes 571a formed in the support portion 571 before being rectified by the plurality of holes 570a, the flow velocity distribution of the steam in the moisture separation element 53 is obtained. Can be more effectively made uniform, and a decrease in the moisture separation performance in the moisture separation heater 517 can be more effectively suppressed.

  As described above, in the moisture separator / heater 517 of the fifth embodiment, the rectifying mechanism 570 is provided along the passage cross-sectional direction of the manifold 49, partitions the manifold 49 with respect to the axial direction, and has a plurality of holes 571 a. It has the formed support part 571. Therefore, the rectifying mechanism 570 can rectify the steam flowing in the manifold 49 by the support portion 571. Further, the rectifying mechanism 570 is secured in the radial direction by the support portion 571 and is prevented from being deformed in the radial direction. As a result, the rectifying mechanism 570 is prevented from being deformed during the construction of the rectifying mechanism 570, so that the workability can be improved.

  In addition, the moisture separator and the rectifying mechanism of the manifold according to the embodiment of the present invention described above are not limited to the embodiment described above, and various modifications can be made within the scope described in the claims. In the above description, the rectifying plate having a plurality of holes for rectifying the vapor has been described as a perforated plate, but may be a mesh member in which holes are formed in a lattice shape. Further, the rectifying plate may be used in multiple stages by stacking perforated plates. In addition, the moisture separator according to the embodiment of the present invention may be configured by combining a plurality of the embodiments described above.

In the description of the moisture separator / heater 317 of Example 3 above, the diameter of the hole 370a ₁ is made larger than the diameter of the hole 370a _{2 and} the diameter of the hole 370a ₃ is made smaller than the diameter of the hole 370a _2. The holes 370a ₁ , the holes 370a _2, and the holes 370a ₃ have been described as having different opening ratios. However, the holes 370a ₁ , the holes 370a _2, and the holes 370a _{3 have} the same diameter, and the holes 370a ₁ , 370a ₂ have the same diameter. and it may be made different aperture ratio by changing the density of the holes 370a ₃ (few). Moreover, the aperture ratios of the holes 370a ₁ , the holes 370a ₂ and the holes 370a ₃ may be appropriately adjusted in accordance with the drift distribution of the steam in the axial direction regardless of the division position. The rectifying mechanism 370 may not be divided.

  In the description of the moisture separator / heater 517 of Example 5 described above, the support portion 571 is described as being provided between the end surfaces of the adjacent split rectifying mechanisms 570b. However, the support portion 571 is provided in a portion other than the split portion. May be. Further, the rectifying mechanism 570 may not be divided. Further, the rectifying mechanism 570 has the largest opening ratio of the hole 570a in the divided rectifying mechanism 570b located on the proximal end side of the manifold 49 as in the rectifying mechanism 370 of the third embodiment, and is divided on the distal end side of the manifold 49. The opening ratio of the hole 570a in the rectifying mechanism 570b may be minimized, and the opening ratio of the hole 571a of the support portion 571 may be different in the axial direction. In this case, the aperture ratio of the hole 571a of the support portion 571 located on the base end side of the manifold 49 may be reduced, and the aperture ratio of the hole 571a of the support portion 571 located on the distal end side of the manifold 49 may be increased. That is, in the rectifying mechanism 570, the cylindrical portion provided along the axial direction has a larger opening ratio on the proximal end side than the opening ratio on the distal end side, and serves as a partition portion provided along the radial direction perpendicular to the axial direction. In the support portion 571, the opening ratio on the proximal end side may be smaller than the opening ratio on the distal end side. Thereby, the flow velocity reduction of the steam blown out from the blower outlet 50 on the distal end side through the hole 570a and the hole 571a becomes larger than the flow velocity drop of the steam blown out from the blower outlet 50 on the proximal end side. Steam drift can be more effectively suppressed. Further, the rectifying mechanism 570 may not be provided with a cylindrical part, but may be constituted only by a partition part, and the aperture ratio of the hole may be appropriately changed according to the flow velocity distribution of steam.

  In the above description, the rectifying mechanism of the manifold of the present invention is applied to the manifold of the moisture separator / heater. However, at least one end is formed in a cylindrical shape that allows fluid to be introduced and the side portion. If it is a manifold having a plurality of outlets through which fluid can be blown out, the same operation and effect as those of the rectifying mechanism described above can be achieved even if it is applied to other manifolds.

  The moisture separator according to the present invention secures good workability while suppressing a decrease in moisture separation performance, and can be applied to moisture separators of various plants.

It is a notch perspective view of the manifold and rectification | straightening mechanism of the moisture separation heater which concern on Example 1 of this invention. It is a schematic sectional drawing of the axial direction of the moisture separation heater which concerns on Example 1 of this invention. It is a schematic sectional drawing of the radial direction of the moisture separation heater which concerns on Example 1 of this invention. It is a notch perspective view which shows the internal structure of the moisture separation heater which concerns on Example 1 of this invention. It is a fragmentary sectional view of the radial direction of the moisture separation heater which concerns on Example 1 of this invention. It is a schematic block diagram of the power plant to which the moisture separation heater based on Example 1 of this invention was applied. It is a schematic perspective view of the rectification | straightening mechanism of the moisture separation heater which concerns on Example 2 of this invention. It is a schematic perspective view of the rectification | straightening mechanism of the moisture separation heater which concerns on Example 3 of this invention. It is a notch perspective view of the manifold and rectification | straightening mechanism of a moisture separation heater which concern on Example 4 of this invention. It is a schematic sectional drawing of the radial direction of the moisture separation heater which concerns on Example 4 of this invention. It is a schematic perspective view of the rectification | straightening mechanism of the moisture separation heater which concerns on Example 5 of this invention. It is the schematic showing the conventional moisture separator.

Explanation of symbols

17, 217, 317, 417, 517 Moisture separation heater (moisture separator)
40 Body 41 Steam inlet 42 Steam outlet 43 Drain outlet 46 Heating pipe 48 Support wall 49 Manifold 50 Air outlet 52 Drain passages 53, 53a, 53b Moisture separation element 54 Separator vane 55 Separator vane support frame 59 Drain opening (drain flow passage)
60 Inflow chamber 61 Manhole 70a, 270a, 370a, 470a, 570a, 571a Hole 70, 270, 370, 470, 570 Rectification mechanism (rectification means)
571 Support (partition)
S ₁ Steam flow space S ₂₁ Steam supply space S ₂₂ Steam discharge space

Claims (11)

A trunk formed in a cylindrical shape, a steam inlet for introducing steam containing moisture into the fuselage in the axial direction of the fuselage, and a base end provided parallel to the axial direction in the fuselage. A manifold that communicates with the steam inlet and has a closed tip, a plurality of outlets that are formed at predetermined intervals along the axial direction on the side of the manifold, and that allow the steam to blow out from the manifold, and the steam passes through A moisture separation element for separating moisture, and a steam outlet for discharging the steam separated by the moisture separation element to the outside of the body in a direction intersecting the axial direction. In the moisture separator,
Characterized in that it comprises a rectifying means provided in the manifold and having a plurality of holes for rectifying the steam introduced from the steam inlet;
Moisture separator. The inflow chamber is provided as an area that is provided in the body and communicates with the steam inlet and the manifold and is accessible from the outside.
The moisture separator according to claim 1. The rectifying means is provided at a predetermined interval with respect to the air outlet,
The moisture separator according to claim 1 or 2. The rectifying means is partially formed along the inner surface of the manifold so as to cover the outlet.
The moisture separator according to any one of claims 1 to 3. The rectifying means is formed in a cylindrical shape along the inner surface of the manifold,
The moisture separator according to any one of claims 1 to 4. The rectifying means is provided along a passage cross-sectional direction of the manifold, and has a partition portion that partitions the manifold with respect to the axial direction and is formed with the plurality of holes.
The moisture separator according to any one of claims 1 to 5. The rectifying means is divided into a plurality in the axial direction,
The moisture separator according to any one of claims 1 to 6. The rectifying means is characterized in that an opening ratio of the plurality of holes is different in the axial direction.
The moisture separator according to any one of claims 1 to 7. A drain passage that is partitioned inside the fuselage and can contain moisture separated from steam by the moisture separation element;
A drain flow passage communicating the inside of the moisture separation element and the drain passage;
A drain outlet that is provided in communication with the drain passage in the trunk and that discharges the moisture to the outside of the trunk.
The moisture separator according to any one of claims 1 to 8. A heating pipe inserted through the body along the axial direction and capable of heating the steam upstream of the steam outlet,
The moisture separator according to any one of claims 1 to 9. A plurality of at least one end provided in a manifold having a plurality of outlets capable of blowing out fluid to the side and having a plurality of outlets for rectifying the fluid introduced from the one end. Characterized in that it comprises rectifying means having holes,
Manifold rectification mechanism.

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