JP2012143710A - Moisture separation unit and moisture separation device having the moisture separation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture separation unit improved in robustness of moisture removing and a moisture separation device having the moisture separation unit.SOLUTION: The moisture separation units 10A-10G having a plurality of bent flow channels 15 (flow channel group 16) and separating moisture contained in steam introduced in the flow channels 15 are configured such that the total length from an introduction port 13 to a lead-out port 14 is divided into a plurality of sections, and at least one of the steam introduced from the introduction port 13 of one flow channel 15 is led from the lead-out port 14 of another flow channel 15.

Description

  Embodiments of the present invention relate to a moisture separation unit that separates moisture from steam and a moisture separation device including the moisture separation unit.

  In a boiling water reactor (BWR) plant, a two-phase flow of water and steam generated in the furnace removes most of the water with a steam-water separator and then a steam dryer composed of a moisture separation unit. Thus, steam with a wetness of 0.1% or less is sent to the high-pressure turbine. Also, in a pressurized water reactor (PWR) plant, the two-phase flow of water and steam generated by a steam generator is similarly sent to a high-pressure turbine via a steam-water separator and a steam dryer.

  Since steam expands in the process of passing through the high-pressure turbine and the wetness increases, before it is sent to the low-pressure turbine, a device such as a moisture separator heater (MSH: Moisture Separator Heater) (moisture separator) The moisture is removed by passing through a moisture separation unit installed in

  For example, as described in Japanese Patent Application Laid-Open No. 2004-205302 (Patent Document 1), the moisture separation unit is configured such that corrugated plates are arranged in parallel, and a zigzag serpentine flow is formed by clamping a spacer between the corrugated plates. A road is formed. When steam flows into the meandering flow path and the flow meanders, water having a large mass is blown outward by inertial force, so that water is collected in a pocket (drain pocket) opened toward the upstream.

  As an example of a moisture separation device provided with a moisture separation unit that separates moisture using such a corrugated plate, Patent Document 1 discloses that a moisture collecting pocket formed on the corrugated plate is changed depending on the location. The removal rate is improved.

JP 2004-205302 A

  The moisture separation unit described above makes the liquid film formed on the wall surface in the pocket by causing the water to collide with the corrugated wall surface by inertia force using the difference in density between water and water vapor by meandering the flow path. Collecting. In such inertial separation, when the steam flow rate increases, water is transported along with the steam. Therefore, when the steam flow rate exceeds a certain level, water is not separated, that is, breakthrough occurs. Therefore, it is necessary to design the moisture separation unit so as not to exceed the upper limit speed of the steam flow rate (hereinafter referred to as “breakthrough flow rate”) that allows inertial separation of water and steam.

  For this reason, the moisture separation unit is designed so that the average inflow rate to the moisture separation unit determined by the inflow area and flow rate of the moisture separation unit is smaller than the breakthrough flow rate. If there is no bias in the distribution, breakthrough will not normally occur.

  However, if the steam drifts due to a bias in the inflow distribution to the moisture separation unit, the flow rate of the steam in the moisture separation unit may locally become larger than the breakthrough flow rate. In this case, since water is transported along with the steam, the moisture separation performance of the moisture separation unit is reduced.

  Embodiments of the present invention have been made in order to solve the above-described problem, and a moisture separation unit with improved moisture separation (removal) robustness and a moisture separation provided with the moisture separation unit. The purpose is to provide a device.

  In order to solve the above-described problem, a moisture separation unit according to an embodiment of the present invention has a plurality of bent flow paths and separates moisture contained in steam introduced into the flow paths. The total length from the inlet to the outlet of the flow path is divided into a plurality of sections, and at least a part of the steam introduced from the inlet of one flow path is led out from the outlet of the other flow path It is structured.

  In order to solve the above-described problem, a moisture separator according to an embodiment of the present invention includes the moisture separator unit.

  According to the embodiment of the present invention, even when flowing into the flow path group at a flow rate that is locally larger than the breakthrough flow speed, the flow rate is decreased in the flow path group. Can be improved.

The block diagram which showed schematically the structure of the steam dryer which is an example of the moisture separator provided with the moisture separation unit which concerns on embodiment of this invention. The longitudinal cross-sectional view which showed schematically the structure of the moisture separation heater which is an example of the moisture separation apparatus provided with the moisture separation unit which concerns on embodiment of this invention. The block diagram which showed schematically the structure of the 1st moisture separation unit which is an example of the moisture separation unit which concerns on the 1st Embodiment of this invention. Sectional drawing in the direction in alignment with the II line | wire of the moisture separation unit shown by FIG. The cross-sectional view of the 2nd moisture separation unit which is an example of the moisture separation unit which concerns on the 2nd Embodiment of this invention. The cross-sectional view of the 3rd moisture separation unit which is an example of the moisture separation unit which concerns on the 3rd Embodiment of this invention. The cross-sectional view of the 4th moisture separation unit which is an example of the moisture separation unit which concerns on the 4th Embodiment of this invention. The cross-sectional view of the 5th moisture separation unit which is an example of the moisture separation unit which concerns on the 5th Embodiment of this invention. The cross-sectional view of the 6th moisture separation unit which is an example of the moisture separation unit which concerns on the 6th Embodiment of this invention. The cross-sectional view of the 7th moisture separation unit which is an example of the moisture separation unit which concerns on the 7th Embodiment of this invention.

  Hereinafter, a moisture separation unit according to an embodiment of the present invention and a moisture separation device including the moisture separation unit will be described with reference to the accompanying drawings.

  FIG. 1 and FIG. 2 are configuration diagrams schematically showing a configuration example of a moisture separation device 70 provided with a moisture separation unit 10 (humidity separation units 10A to 10G described in detail later) according to an embodiment of the present invention. FIG. 1 is a configuration diagram schematically showing the configuration of the steam dryer 70A, and FIG. 2 is a longitudinal sectional view showing the schematic configuration of the moisture separation heater 70B.

  As shown in FIG. 1, a steam dryer 70 </ b> A, which is an example of a moisture separator 70, includes a moisture separator unit 10 having a plurality of bent flow paths. For example, water generated in a nuclear power generation system The steam S0 after passing through the steam-water separator that removes most of the water in the two-phase flow of steam and steam is introduced into the moisture separation unit 10 to further separate the moisture. The steam S1 that has passed through the moisture separation unit 10 has a wetness of 0.1% or less and is supplied to the high-pressure turbine. The water separated and collected by the moisture separation unit 10 is collected in the drain 71 and discharged from the drain pipe 72 to the outside of the steam dryer 70A. 70 A of steam dryers are normally provided in the upper part of a reactor pressure vessel if it is a boiling water reactor (BWR), and are provided in the upper part of a steam generator (SG) if it is a pressurized water reactor (PWR).

  Reference numeral 73 denotes a casing of the steam dryer 70A, and reference numeral 11 denotes a plate-like structure (hereinafter simply referred to as “vane”) 12 that forms a flow path and holds (holds) the sandwiched structure from both sides. It is a plate-like structure (hereinafter referred to as “clamping plate”). Grooves into which the vanes 12 are fitted are formed in the clamping plate 11, and the vanes 12 are clamped from both sides (vertical direction in FIG. 1) by fitting into the grooves.

  On the other hand, as shown in FIG. 2, a moisture separator heater (MSH) 70B, which is an example of a moisture separator 70, is provided on the path of a steam system that guides steam from a high-pressure turbine to a low-pressure turbine, A cylindrical main body container 81, a moisture separation unit 10 and a heater 82 housed in the main body container 81 are provided.

  At the bottom of the main body container 81, for example, two moisture separation units 10 are disposed so as to face each other, a first stage heater 82a is disposed above them, and a second stage heater 82b is disposed above them. Is placed. In addition, a drain flow path 85 defined by a bottom plate 83 and a ceiling plate 84 is formed between the two moisture separation units 10.

  Inside the main body container 81, flow path partition plates 91, 92 a, 92 b are sequentially arranged from the lower heated steam inlet 87 to the upper heated steam outlet 88, and the moisture separation unit 10, first stage heating is arranged. A flow path for sequentially leading the heated steams S0 and S1 to the heater 82a and the second stage heater 82b is formed. The drain channel 85 is isolated from the channel of the heated steam S0. A space surrounded by the flow path partition plate 91 and the flow path partition plate 92 a is communicated with the downstream side of the moisture separation unit 10. The space surrounded by the flow path partition plate 92a and the flow path partition plate 92b communicates with the downstream side of the first stage heater 82a.

  The moisture separation heater 70B configured in this way guides the heated steam S0 flowing from the heated steam inlet 87 to the moisture separation unit 10, and the heated steam S1 separated by the moisture separation unit 10 from the moisture. Subsequently, the steam S1 to be heated is guided to the heater 82, and the heating steam S2 is generated by the heating by the heater 82. The generated heated steam S2 is supplied from the heated steam outlet 88 to the low pressure turbine. In addition, the code | symbols 95a and 95b shown by FIG. 2 are the heat exchanger tubes arrange | positioned in U shape.

  The moisture separation device 70 includes a moisture separation unit 10 (humidity separation units 10A to 10G described in detail later) in addition to the above-described steam dryer 70A and moisture separation heater 70B. Any device that separates steam moisture by (10A-10G) is included. Hereinafter, the moisture separation units 10A to 10G, which are examples of the moisture separation unit according to each embodiment of the present invention, will be described.

[First Embodiment]
FIG. 3 schematically shows the configuration of a moisture separation unit (hereinafter referred to as “first moisture separation unit”) 10A which is an example of the moisture separation unit according to the first embodiment of the present invention. It is a block diagram.

  For example, as shown in FIG. 3, the first moisture separation unit 10 </ b> A is configured by fitting and holding both ends of the vane 12 by the holding plate 11 in which the groove for fitting the vane 12 is formed. A flow path having a flow path 15 that erects the vane 12 between the sandwiching plates 11, introduces the steam S0 from the introduction port 13, meanders and separates the moisture after separating the moisture S1 from the discharge port 14. A group 16 is formed. FIG. 3 illustrates the first moisture separation unit 10A, but other moisture separation units 10B to 10G described later are similarly configured.

  4 is a cross-sectional view taken along the line II of the moisture separation unit 10A (10B to 10G) shown in FIG. 3 (hereinafter referred to simply as a cross-sectional view taken along the line II). .)

  In the first moisture separation unit 10A, a flow path group 16 having a plurality of flow paths 15 bent by arranging a plurality of vanes 12 (12A, 12B) in a matrix is formed. In the following description, in describing the matrix of the vanes 12, the vanes 12 arranged in the m-th row (vertical direction) from the top row are simply referred to as “m-th row vanes 12”, and the inlet 13 The vanes 12 arranged in the nth row (lateral direction) from the side are simply referred to as “nth row vanes 12”. Further, in describing the flow path 15 formed by the matrix of the vanes 12, the flow path 15 from the inlet 13 to the outlet 14 formed by the mth and m + 1th vanes 12 is simply referred to as “mth row”. And a partial section of the flow path 15 formed by the nth row of vanes 12 is simply referred to as an “nth row section”.

  The vane 12 </ b> A is a vane (hereinafter referred to as “normal vane”) except for one row that is closest to the inlet 13 and the outlet 14, and the vane 12 </ b> B is the inlet 13 and the outlet 14. The vanes are arranged in a row closest to (hereinafter referred to as “guided vanes”).

  For example, in the moisture separation unit 10A shown in FIG. 4, 3 rows (vertical direction) × 4 columns (horizontal direction) = 12 vanes 12 are arranged in a matrix and arranged at the ends (at the left and right ends). Six vanes 12B with guides are arranged in three rows for two columns, and the remaining six vanes (arranged in three rows for the second and third columns from the left) are normal vanes 12A.

  The normal vane 12A has a substantially V-shaped cross-sectional shape (hereinafter simply referred to as “transverse cross-sectional shape”) in the direction along the line I-I shown in FIG. 3 (the direction perpendicular to the axis of the normal vane 12A). A vane body 21A formed in a mold, and a pocket member 23 that forms a pocket 22 that inertially separates and collects water from steam (two-phase flow of water and steam). In addition, the guide vane 12B is different from the vane body 21A in comparison with the normal vane 12A in that the guide 24 for guiding the steam to the inlet 13 and the outlet 14 is provided at the end of the vane body 21A. Is provided.

  As with the vane body 21, the pocket member 23 has a cross-sectional shape (a cross-sectional shape in the direction along the line I-I shown in FIG. 3), for example, a straight line such as a substantially V-shape bent at least once. The pocket 22 formed by the pocket member 23 and the vane main bodies 21A and 21B is attached to the vane main bodies 21A and 21B so that the inlet of the pocket 22 faces the upstream side with respect to the flow direction of the steam. . That is, the pocket member 23 constitutes the normal vane 12A and the guide vane 12B having the pocket 22 in combination with the vane main bodies 21A and 21B.

  In the first moisture separation unit 10A, a flow path group 16 having a plurality of flow paths 15 having a flow path width 2d for guiding steam from the inlet 13 to the outlet 14 is formed, and the vanes 12 in adjacent rows They are arranged so as to be shifted in the vertical direction with respect to the flow direction (the direction connecting the inlet 13 and the outlet 14). For example, in the first moisture separation unit 10A shown in FIG. 4, the second row of normal vanes 12A and the fourth row of normal vanes 12B and the third row of normal vanes 12A and the fourth row of normal vanes 12A. The vanes 12B with guides are arranged to be shifted upward by a distance (half pitch) d corresponding to half of the flow path width 2d.

  In the first moisture separation unit 10A configured as described above, after the two-phase flow of the inflowing steam and water is led from the inlet 13 to the first row section, the first row section and the second row The two-phase flow from the two adjacent flow paths 15 formed in the first row section is merged in the second row section while being distributed to the two adjacent flow paths 15 between the row sections. To do. In the subsequent rows as well, between the first and second rows, the distribution and merging are repeated, and the two-phase flow of steam and water flowing in from the inlet 13 finally passes from the section of the last row to the outlet 14. Led.

  For example, in the case of the first moisture separation unit 10 </ b> A shown in FIG. 4, the two-phase flow of steam and water that has flowed into the flow path 15 in the second row is led from the inlet 13 to the section in the first row. After that, the second row of flow channels 15 and the third row of flow channels 15 are distributed between the first column section and the second column section, while the second column section 1 Two-phase flows merge from two of the second row of flow paths 15 and the third row of flow paths 15 formed in the column section. In the subsequent rows as well, between the first and second rows, the distribution and merging are repeated, and the two-phase flow of steam and water flowing in from the inlet 13 finally passes from the section of the last row to the outlet 14. Led. Further, the pockets 22 of each row of vanes 12 have their inlets facing upstream with respect to the flow direction of the steam, and the steam introduced by flowing through the flow path 15 through which the steam introduced from the introduction port 13 flows. The water contained in is inertially separated and collected.

  According to the present embodiment, since the flow to the first moisture separation unit 10A is unevenly distributed, the flow into the flow paths 15 from the inlet 13 is locally higher than the breakthrough flow rate. However, since the flow is distributed to the adjacent flow paths 15 in each section after the second row, the flow velocity is averaged toward the downstream. That is, in the first moisture separation unit 10A, the steam introduced into the flow path 15 from the inlet 13 is not led out as it is from the outlet 14 of the same flow path 15, but at least between successive sections. Since a part of the flow path 15 is configured to be movable, even if the steam flow is uneven, the unevenness can be corrected.

  Therefore, the moisture separation device 70 including the first moisture separation unit 10A and the first moisture separation unit 10A can improve the robustness of moisture removal with respect to the inflow distribution.

  In the first moisture separation unit 10A shown in FIG. 4, the gravity direction is described from the front side to the back direction on the paper surface of FIG. 4, but it may be from the back side to the front direction. This also applies to moisture separation units 10B, 10C, 10D, and 10E shown in FIGS.

[Second Embodiment]
The moisture separation unit according to the second embodiment of the present invention is different from the moisture separation unit according to the first embodiment of the present invention in terms of the configuration of the flow path 15, that is, the shape and arrangement of the vanes 12. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  The 2nd moisture separation unit 10B which is an example of the moisture separation unit which concerns on the 2nd Embodiment of this invention is comprised similarly to 10 A of 1st moisture separation units shown by FIG. 3, for example. That is, if the code | symbol 10A shown in FIG. 3 is read as 10B, FIG. 3 after reading will become a block diagram which showed the structure of the 2nd moisture separation unit 10B roughly.

  FIG. 5 is a cross-sectional view of a second moisture separation unit 10B which is an example of a moisture separation unit according to the second embodiment of the present invention.

  The second moisture separation unit 10B is different from the first moisture separation unit 10A in that the second row of normal vanes 12A and the fourth row of guide vanes 12B are replaced with normal vanes 12C in the second row. The fourth row is different from the vane 12D with guide in the fourth row. That is, the moisture separation unit according to the second embodiment of the present invention includes a guided vane 12B in the first row, a guided vane 12C in the even row, and a normal vane 12A in the odd rows except the first row, The vane 12B with guide (when the final column is an odd column) or the vane 12D with guide (when the final column is an even column) is arranged in a matrix in the final column.

  The normal vane 12C is the same as the normal vane 12A in that the vane body 21A and the pocket member 23 are provided, but the direction of the vane body 21A is different from that of the normal vane 12A. In the normal vane 12A, the bending point of the vane body 21A is on the upper side with respect to the direction in which the introduction port 13 is on the left and the outlet port 14 is on the right, whereas in the normal vane 12C, the bending point of the vane body 21A is Is on the bottom. That is, the bending direction (protruding direction) is reversed between the normal vane 12A and the normal vane 12C.

  Further, in both the normal vane 12A and the normal vane 12C, the pocket member 23 is attached to the vane body 21A so that the inlet of the pocket 22 faces the upstream side with respect to the flow direction of the steam. While the pocket member 23 is attached to the outer surface of the V-shaped (see, for example, the normal vane 12A in the third row shown in FIG. 5), in the normal vane 12C, the pocket member is disposed on the inner surface of the V-shaped vane body 21A. 23 (see, for example, the normal vane 12C in the second row shown in FIG. 5).

  The guide vane 12D has a guide 24 installed at the end of the normal vane 12C, and a component corresponding to the normal vane 12A of the vane 12B with guide is replaced with a component corresponding to the normal vane 12C. . That is, the bending point of the vane body 21A is on the lower side.

  In the 2nd moisture separation unit 10B comprised in this way, after the two-phase flow of the inflowing steam and water is guide | induced to the 1st row | line area from the inlet 13, after the 1st row | line area and 2nd flow The two-phase flow from the two adjacent flow paths 15 formed in the first row section is merged in the second row section while being distributed to the two adjacent flow paths 15 between the row sections. To do. In the subsequent rows as well, between the first and second rows, the distribution and merging are repeated, and the two-phase flow of steam and water flowing in from the inlet 13 finally passes from the section of the last row to the outlet 14. Led.

  For example, in the case of the second moisture separation unit 10 </ b> B shown in FIG. 5, the two-phase flow of steam and water flowing into the flow path 15 in the second row is guided from the inlet 13 to the section in the first row. After that, the second row of flow channels 15 and the third row of flow channels 15 are distributed between the first column section and the second column section, while the second column section 1 Two-phase flows merge from two of the second row of flow paths 15 and the third row of flow paths 15 formed in the column section. In the subsequent rows as well, between the first and second rows, the distribution and merging are repeated, and the two-phase flow of steam and water flowing in from the inlet 13 finally passes from the section of the last row to the outlet 14. Led. Further, the pockets 22 of each row of vanes 12 have their inlets facing upstream with respect to the flow direction of the steam, and the steam introduced by flowing through the flow path 15 through which the steam introduced from the introduction port 13 flows. The water contained in is inertially separated and collected.

  Further, in the second moisture separation unit 10B, when steam merges from two sections in the front row to one section in the next row, the direction in which the steam flows from one section of the front row and the other sections of the front row Since the steam flows in the same direction, the steam flows in the same direction without colliding. As a result, the second moisture separation unit 10B has an effect of suppressing an increase in pressure loss in addition to the same effect as that of the first moisture separation unit 10A.

  According to the present embodiment, since the flow to the second moisture separation unit 10B is unevenly distributed, the flow into the flow paths 15 from the inlet 13 is locally higher than the breakthrough flow velocity. Even so, since the flow is distributed to the adjacent flow paths 15 in each section from the second row onward, the flow velocity is averaged toward the downstream. Also, when the steam distributed at one location merges with the steam distributed at another location, the steam flows in the same direction. Can do.

  In the moisture separation device 70 including the second moisture separation unit 10B and the second moisture separation unit 10B, the moisture removal robustness is improved with respect to the inflow distribution, similarly to the first moisture separation unit 10A. In addition to being able to improve, since the collision at the time of confluence | merging with the distributed vapor | steam can be suppressed, the increase in the pressure loss in the 2nd moisture separation unit 10B can be suppressed.

[Third Embodiment]
The moisture separation unit according to the third embodiment of the present invention is different from the moisture separation units according to the first and second embodiments of the present invention in the configuration of the flow path 15, that is, the shape and arrangement of the vanes 12. It is different from the viewpoint. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  A third moisture separation unit 10C, which is an example of a moisture separation unit according to the third embodiment of the present invention, is configured similarly to the first moisture separation unit 10A shown in FIG. 3, for example. That is, if the reference numeral 10A shown in FIG. 3 is replaced with 10C, FIG. 3 after the replacement is a configuration diagram schematically showing the configuration of the third moisture separation unit 10C.

  FIG. 6 is a cross-sectional view of a third moisture separation unit 10C which is an example of the moisture separation unit according to the third embodiment of the present invention.

  Compared with the second moisture separation unit 10B, the third moisture separation unit 10C has a different positional relationship in which the vanes 12 in the second row and thereafter are installed. More specifically, the start end position of the vane 12 is disposed upstream of the end position of the vane 12 in the front row with respect to the steam flow direction (left to right direction shown in FIG. 6). In each section of the flow path 15, the steam is diverted at a position before (upstream side) from the end position. In other words, each flow path 15 has a partial overlap in adjacent rows.

  A straight line that connects the start positions of the vanes 12 in each row is arranged upstream of the straight line that connects the end positions of the vanes 12 in the previous row with respect to the flow direction of steam (the direction from left to right shown in FIG. 6). In the third moisture separation unit 10 </ b> C, the second moisture separation unit 10 </ b> B in which the straight line connecting the start position of each vane 12 with the end position of the vane 12 in the front row coincides with the straight line connecting the end position of the vane 12 in the front row. On the other hand, in the case of the same number of rows, the length of the flow path 15 in the flow direction (hereinafter referred to as “full length”) is shortened, and the overall configuration is compact.

  According to the present embodiment, since the flow to the third moisture separation unit 10C is unevenly distributed, the flow into the flow paths 15 from the inlet 13 is locally higher than the breakthrough flow rate. Even so, since the flow is distributed to the adjacent flow paths 15 in each section from the second row onward, the flow velocity is averaged toward the downstream. Also, when the steam distributed at one location merges with the steam distributed at another location, the steam flows in the same direction. Can do. Furthermore, in the case of the same number of rows, the total length is shortened, and the configuration is more compact than the first and second moisture separation units 10A and 10B.

  In the moisture separation device 70 including the third moisture separation unit 10C and the third moisture separation unit 10C, the moisture removal robustness is improved with respect to the inflow distribution, similarly to the second moisture separation unit 10B. In addition to being able to improve, the collision at the time of merging by the distributed steam can be controlled. Further, as compared with the first and second moisture separation units 10A and 10B, a compact configuration can be achieved while maintaining the moisture removal capability. Further, if the third moisture separation unit 10C is configured with the same overall length as the first and second moisture separation units 10A and 10B, the number of rows of the vanes 12 can be increased, so that the size is increased. The moisture removal rate can be improved without any problems.

[Fourth Embodiment]
The moisture separation unit according to the fourth embodiment of the present invention is different from the moisture separation unit according to the first embodiment of the present invention in terms of the configuration of the flow path 15, that is, the shape and arrangement of the vanes 12. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  A fourth moisture separation unit 10D, which is an example of a moisture separation unit according to the fourth embodiment of the present invention, is configured similarly to the first moisture separation unit 10A shown in FIG. 3, for example. That is, if the code | symbol 10A shown in FIG. 3 is read as 10D, FIG. 3 after replacement will become a block diagram which showed schematically the structure of 4th moisture separation unit 10D.

  FIG. 7 is a cross-sectional view of a fourth moisture separation unit 10D which is an example of a moisture separation unit according to the fourth embodiment of the present invention.

  The fourth moisture separation unit 10D is provided with a normal vane 12C instead of the second row of normal vanes 12A with respect to the first moisture separation unit 10A, and the second row of normal vanes 12A and normal vanes. The difference is that the number of 12C is different from the point that the third row includes the vane 12F with guide in the third row instead of the normal vane 12A in the third row and the vane 12D with guide in the fourth row.

  The vane 12F with guide is a combination of the vane main body 21A in two lateral directions instead of the vane main body 21A, with respect to the vanes 12B and 12D with guide having the vane main body 21A having a substantially V-shaped cross section. The difference is that a vane body 31 having a substantially W-shaped (or M-shaped) cross-sectional shape is provided.

  In other words, the guide vane 12F is a bending point of a normal vane 12A formed in a substantially V shape and a guide vane 12D provided with a guide 24 at the end of a normal vane 12C formed in a substantially V shape. The section length of the flow path 15 formed by a substantially M-shaped (W-shaped) integrated in the same direction and formed by the vane 12F with guide is approximately twice that of the normal vane 12A (two rows). Min) length.

  In the fourth moisture separation unit 10D configured by combining the normal vane 12C and the guide vane 12F, the flow path width is increased in a partial section of the flow path 15 without changing the width of the flow path group 16. Since it can be changed, the flow can be distributed or merged in the region between the rows where the flow path width changes.

  For example, in the fourth moisture separation unit 10D shown in FIG. 7, the number of vanes 12C to be arranged in the second row section which is a partial section of the flow path 15 is larger than the vanes 12B and 12F in the other sections. By increasing the number by 4 (4 rows), the flow path width d1 is narrower than the flow path width d2 of the sections of the first, third, and fourth columns, which are other sections. As a result, in the flow path 15 of the fourth moisture separation unit 10D, the flow is distributed between the first row section and the second row section, and the moisture removal robustness can be improved.

  According to the present embodiment, even if the flow to the moisture separation unit is locally flowing from the inlet 13 to each flow path 15 at a flow velocity larger than the breakthrough flow velocity, each section in the second row and thereafter Since the flow is distributed to the adjacent flow paths 15, the flow velocity is averaged downstream. Therefore, in the moisture separation device 70 including the fourth moisture separation unit 10D and the fourth moisture separation unit 10D, as in the first moisture separation unit 10A, the moisture removal is robust against the inflow distribution. Can be improved.

  In the fourth moisture separation unit 10D shown in FIG. 7, the first row is set by setting the channel width d2 in the first, third, and fourth row sections and the channel width d1 in the second row section. The flow is distributed between the section of the second row and the section of the second row, but by changing the number of the vanes 12 other than the second row, a portion other than between the section of the first row and the section of the second row It is also possible to distribute the flow in the region. In this case, further improvement in the robustness of moisture removal can be expected as compared with the case where the flow is distributed only between the first row section and the second row section.

  Further, in the fourth moisture separation unit 10D shown in FIG. 7, an example in which the vane with guide 12F is applied to the end side of the flow path 15 is shown, but the normal vane 12A and the vane with guide 12D are individually provided. The same configuration as the guide vane 12F may be used.

[Fifth Embodiment]
The moisture separation unit according to the fifth embodiment of the present invention is different from the moisture separation unit according to the first embodiment of the present invention in terms of the configuration of the flow path 15, that is, the shape and arrangement of the vanes 12. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  A fifth moisture separation unit 10E that is an example of a moisture separation unit according to the fifth embodiment of the present invention is configured in the same manner as the first moisture separation unit 10A shown in FIG. 3, for example. That is, if the code | symbol 10A shown in FIG. 3 is read as 10E, FIG. 3 after reading will become a block diagram which showed schematically the structure of the 5th moisture separation unit 10E.

  FIG. 8 is a cross-sectional view of a fifth moisture separation unit 10E which is an example of a moisture separation unit according to the fifth embodiment of the present invention.

  The fifth moisture separation unit 10E is different from the first moisture separation unit 10A in the first row of vanes with guides 12B, the second row of normal vanes 12A, the third row of normal vanes 12A, and the fourth row. A difference is that a vane 12G with guide is provided instead of the vane 12B with guide in the row.

  The guide vane 12G includes a vane body 31 having a substantially W-shaped (or M-shaped) cross-sectional shape, and a pocket member 33 that forms a pocket 32a that inertially separates and collects water from steam.

  The pocket 32a is a water collection region having the vane body 31 and the pocket member 33 as wall surfaces, and its cross-sectional shape (cross-sectional shape in the direction along the line II shown in FIG. 3) is one side of a triangle. It is comprised in the substantially triangular shape which uses as an opening part. The pocket 32a is provided so as to face the upstream side with respect to the flow direction of the steam.

  The pocket member 33 is a plate-like member bent at one place similarly to the pocket member 23, and is attached to the vane body 31 so that the inlet (opening) faces the upstream side with respect to the flow direction of the steam. That is, the pocket member 33 constitutes the vane 12G with a guide having the pocket 32a opened on the upstream side together with the vane body 31.

  For example, in the vane with guide 12G shown in FIG. 8, the three pockets 32a are formed by attaching the three pocket members 33 to the straight portion of W of the vane body 31 having a substantially W-shaped cross section. Provided. The pocket 32a has a flow of steam at a position on the outer side when the steam meanders in a section of the flow path 15 formed by two adjacent guide vanes 12G when the guided vanes 12G are arranged in the same row. It is provided with the upstream side opened with respect to the direction.

  In the fifth moisture separation unit 10E, as in the first moisture separation unit 10A, a channel group 16 having a plurality of channels 15 having a channel width 2d that leads the vapor from the inlet 13 to the outlet 14 is formed. The adjacent rows of guide vanes 12G are arranged at a distance (half pitch) d corresponding to half of the flow path width 2d in the direction perpendicular to the flow direction of the steam. For example, in the fifth moisture separation unit 10E shown in FIG. 8, the second row of guided vanes 12G is arranged so as to be shifted by a half pitch d downward from the first row of guided vanes 12G. .

  In the fifth moisture separation unit 10E configured as described above, a phenomenon similar to that of the first moisture separation unit 10A occurs. That is, after the two-phase flow of steam and water flowing into the fifth moisture separation unit 10E is led from the inlet 13 to the first row section, the first row section and the second row section In the second row section, the two-phase flows from the two adjacent flow paths 15 formed in the first row section merge.

  Further, since the cross-sectional shape of the pocket 32a is substantially triangular, the pocket 32a has a cross-sectional shape that is not substantially triangular, as compared with the conventional or first to fourth moisture separation units 10A to 10D. The contracted flow in the flow path 15 is alleviated.

  According to the present embodiment, since the flow to the fifth moisture separation unit 10E is unevenly distributed, the flow into the flow paths 15 from the inlet 13 is locally higher than the breakthrough flow rate. Even so, since the flow is distributed to the adjacent flow paths 15 in each section from the second row onward, the flow velocity is averaged toward the downstream. Therefore, the moisture separator 70 including the fifth moisture separation unit 10E and the fifth moisture separation unit 10E can improve moisture removal robustness with respect to the inflow distribution.

  Further, in the moisture separator 70 provided with the fifth moisture separation unit 10E and the fifth moisture separation unit 10E, the shape of the cross section of the pocket 32a is substantially triangular, so the shape of the transverse section is substantially triangular. Compared with the conventional or first to fourth moisture separation units 10A to 10D that are not shaped, the contraction of the flow path 15 by the pocket 32a can be reduced.

[Sixth Embodiment]
The moisture separation unit according to the sixth embodiment of the present invention is different from the moisture separation unit according to the fifth embodiment of the present invention in terms of the configuration of the flow path 15, that is, the shape and arrangement of the vanes 12. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  A sixth moisture separation unit 10F, which is an example of a moisture separation unit according to the sixth embodiment of the present invention, is configured similarly to the first moisture separation unit 10A shown in FIG. 3, for example. That is, if the code | symbol 10A shown in FIG. 3 is read as 10F, FIG. 3 after reading will become a block diagram which showed schematically the structure of the 6th moisture separation unit 10F.

  FIG. 9 is a cross-sectional view of a sixth moisture separation unit 10F that is an example of the moisture separation unit according to the sixth embodiment of the present invention.

  The sixth moisture separation unit 10F is different from the fifth moisture separation unit 10E in that it includes the vanes 12H and 12I with guides instead of the direction of the flow path 15 and the vanes 12G with guides. .

  The vanes with guides 12H and 12I include a vane main body 31 having a substantially W-shaped (or M-shaped) cross-sectional shape, and a pocket member 33 that forms a pocket 32b that inertially separates and collects water from steam. Prepare.

  The pocket 32b is a water collecting region in which the cross-sectional shape with the vane body 31 and the pocket member 33 as the wall surface is configured in a substantially triangular shape, like the pocket 32a, and when the vanes 12H with guides are arranged in the same row In the section of the flow path 15 formed by the two guide vanes 12H adjacent to each other, it is common in that it is provided at a position outside the steam when meandering, but the direction in which the pocket 32b opens is the flow of steam. It is on the downstream side (ceiling side) with respect to the direction and is different from the opening direction of the pocket 32a facing the upstream side with respect to the flow direction of the steam.

  In the sixth moisture separation unit 10F configured by standing these vanes 12H and 12I with guides, a flow having a plurality of channels 15 having a channel width 2d for guiding the steam from the inlet 13 to the outlet 14 is provided. A path group 16 is formed, and the guide vanes 12H and 12I in adjacent rows are arranged at a distance (half pitch) d corresponding to a half of the flow path width 2d in the direction perpendicular to the flow direction of the steam.

  In addition, the sixth moisture separation unit 10F has a direction in which the flow path 15 is formed, that is, a gravity direction, which is different from the gravity directions of the first to fifth moisture separation units 10A to 10E. Specifically, the gravity direction of the sixth moisture separation unit 10F is the left-right direction on the paper surface as shown in FIG. 9, but the gravity direction of the first to fifth moisture separation units 10A to 10E. Is the front and back direction of the paper as shown in FIGS.

  The guided vane 12H is configured by further providing a return portion 34 on the downstream (terminal) side of the vane body 31 with respect to the guided vane 12I. By providing the return portion 34, water droplets attached to the wall surface of the return portion 34 can be collected in the pocket 32b that is provided on the ground side and opens toward the ceiling side when the water drops are collected. Separation effect) can be enhanced.

  For example, in the sixth moisture separation unit 10F shown in FIG. 9, a guided vane 12H is provided in the first row, a guided vane 12I is provided in the second row (final row), and steam is provided on the ground side. It is comprised so that it may guide | invade from the provided inlet 13 to the outlet 14 provided in the ceiling side. Further, the pocket 32b is provided with an opening on the downstream side (ceiling side) with respect to the steam flow direction.

  In the sixth moisture separation unit 10F configured as described above, the same phenomenon as that of the fifth moisture separation unit 10E occurs. That is, after the two-phase flow of steam and water flowing into the sixth moisture separation unit 10F is led from the inlet 13 to the first row section, the first row section and the second row section In the second row section, the two-phase flows from the two adjacent flow paths 15 formed in the first row section merge. Moreover, compared with the conventional or 1st-4th moisture separation unit 10A-10D, the contracted flow of the flow path 15 by the pocket 32b is relieve | moderated.

  Further, since the flow direction of the steam is opposite to the direction in which the gravity acts and the pocket 32b is opened on the ceiling side, the pocket 32b opened toward the downstream side has the vane body 31 and the return portion 34 in the pocket 32b. Water droplets attached to the wall surface can be collected by gravity drop.

  According to the present embodiment, it is possible to achieve the same effect as that of the moisture separator 70 provided with the fifth moisture separator unit 10E and the fifth moisture separator unit 10E. That is, in the moisture separator 70 including the sixth moisture separation unit 10F and the sixth moisture separation unit 10F, the robustness of moisture removal with respect to the inflow distribution can be improved, and the conventional or first Compared with the 1st-4th moisture separation units 10A-10D, the contraction of the flow path 15 by the pocket 32b can be eased.

  The sixth moisture separation unit 10F described in the present embodiment is different from the first to fifth moisture separation units 10A to 10E in the gravitational direction as described above, and sandwiches the vane 12 in the horizontal direction. It becomes composition. Therefore, when applied to the steam dryer 70A, unlike the configuration shown in FIG. 1, the heated steam S0 flows from below the sixth moisture separation unit 10F, and the heated steam S1 becomes the sixth moisture. The water passing through the separation unit 10F and guided to the high-pressure turbine and collected by the sixth moisture separation unit 10F is discharged from the side to the outside of the steam dryer 70A.

[Seventh Embodiment]
The moisture separation unit according to the seventh embodiment of the present invention is different from the moisture separation unit according to the sixth embodiment of the present invention in terms of the direction of the flow path 15, that is, the arrangement direction of the vanes 12. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  A seventh moisture separation unit 10G, which is an example of a moisture separation unit according to the seventh embodiment of the present invention, is configured similarly to the first moisture separation unit 10A shown in FIG. 3, for example. That is, if the code | symbol 10A shown in FIG. 3 is read as 10G, FIG. 3 after reading will become a block diagram which showed schematically the structure of the 7th moisture separation unit 10G.

  FIG. 10 is a cross-sectional view of a seventh moisture separation unit 10G which is an example of a moisture separation unit according to the seventh embodiment of the present invention.

  The seventh moisture separation unit 10G includes guide vanes 12J and 12K instead of the guide vanes 12H and 12I with respect to the sixth moisture separation unit 10F. Is different. That is, in the seventh moisture separation unit 10G, a flow path group 16 having a plurality of flow paths 15 having a flow path width 2d that guides the vapor from the inlet 13 to the outlet 14 is formed, and the guide vanes 12J in adjacent rows are formed. , 12K are arranged at a distance (half pitch) d corresponding to half of the flow path width 2d in the direction perpendicular to the flow direction of the steam.

  In addition, the seventh moisture separation unit 10G has the direction of the flow path 15, that is, the direction of gravity is the gravity of the first to fifth moisture separation units 10A to 10E and the sixth moisture separation unit 10F. It is different from the direction. Specifically, the gravitational direction of the seventh moisture separation unit 10G is the vertical direction on the paper surface as shown in FIG.

  The vane 12J with guide is common to the vane 12H with guide in that the pocket member 33 is attached to the straight portion of W of the vane body 31 and a return portion 34 is further provided on the downstream (terminal) side of the vane body 31. However, it is different in that the pocket member 33 is attached so as to have a pocket 32a opened on the upstream side in the steam flow direction and a pocket 32b opened on the downstream side in the steam flow direction.

  Further, the vane 12K with a guide has a pocket 32a opened on the upstream side with respect to the steam flow direction and a pocket 32b opened on the downstream side with respect to the steam flow direction in the straight portion W of the vane body 31. The pocket member 33 is attached so as to have.

  In the seventh moisture separation unit 10G configured by standing such vanes with guides 12H and 12I, a flow having a plurality of channels 15 having a channel width 2d for guiding steam from the inlet 13 to the outlet 14 is provided. A path group 16 is formed, and the guide vanes 12J and 12K in adjacent rows are arranged at a distance (half pitch) d corresponding to half of the flow path width 2d in the direction perpendicular to the flow direction of the steam.

  In addition, the seventh moisture separation unit 10G has the direction of the flow path 15, that is, the direction of gravity is the gravity of the first to fifth moisture separation units 10A to 10E and the sixth moisture separation unit 10F. It is different from the direction. Specifically, the seventh moisture separation unit 10G is in the vertical direction on the paper surface as shown in FIG.

  Further, in the seventh moisture separation unit 10G, the pocket 32a opened upstream with respect to the flow direction of the steam faces the ceiling side (the upper side shown in FIG. 10), so that the liquid film adhered to the wall surface Can be directly collected by the pocket 32a, and the pocket 32b opened downstream with respect to the flow direction of the steam is on the ground side (the lower side shown in FIG. 10). The liquid film can be collected in the pocket 32b.

  According to the present embodiment, it is possible to achieve the same effect as that of the moisture separator 70 provided with the fifth moisture separator unit 10E and the fifth moisture separator unit 10E. That is, in the moisture separation device 70 including the seventh moisture separation unit 10G and the seventh moisture separation unit 10G, the robustness of moisture removal with respect to the inflow distribution can be improved, and the conventional or Compared with the first to fourth moisture separation units 10A to 10D, the contraction of the flow path 15 by the pockets 32a and 32b can be reduced.

  As described above, according to the moisture separation device including the moisture separation unit and the moisture separation unit according to the embodiment of the present invention, the inflow distribution is higher than the conventional moisture separation unit and the moisture separation unit including the moisture separation unit. On the other hand, the robustness of moisture removal can be improved.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. For example, in the first moisture separation unit 10A shown in FIG. 4, a case is described in which the guide vane 12B is provided with the guide 24 provided at one end of the normal vane 12A. Then, the guide 24 and the normal vane 12A do not necessarily have to be integrally formed. Instead of the guide vane 12B in which the guide 24 and the normal vane 12A are integrally formed, the guide 24 and the normal vane 12A are It is also possible to adopt a configuration in which these are individually arranged. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 (10A to 10G) Moisture separation unit 11 Holding plate 12 (12A to 12K) Vane 13 Inlet 14 Outlet 15 Channel 16 Channel group 21 (21A, 21B) Vane main body 22 Pocket 23 Pocket member 24 Guide 31 Vane Main body 32a, 32b Pocket 33 Pocket member 34 Return portion 70 Moisture separator 70A Steam dryer 70B Moisture separator heater 71 Drain trough 72 Drain pipe 73 Casing 81 Main body container 82a First stage heater 82b Second stage heater 83 Bottom plate 84 Ceiling plate 85 Drain flow path 87 Heated steam inlet 88 Heated steam outlet 91 Channel partition plates 92a and 92b Channel partition plates 95a and 95b Heat transfer tubes

Claims (11)

In a moisture separation unit that has a plurality of bent flow paths and separates moisture contained in steam introduced into the flow paths,
The entire length from the inlet to the outlet of the flow path is divided into a plurality of sections, and at least a part of the steam introduced from the inlet of one flow path is led out from the outlet of the other flow path. Moisture separation unit characterized by that. A vane having a section divided into a plurality of the flow paths and provided with a pocket for collecting moisture separated from the steam;
Two plate-like bodies that are sandwiched and held from both ends of the vane that are erected in a direction perpendicular to the direction connecting the introduction port and the outlet port, and
The vanes are arranged in a matrix in both a first direction connecting the inlet and the outlet and a second direction perpendicular to the first direction, from the inlet. The sections that are counted in the same row are arranged at a predetermined distance in a direction parallel to the second direction, and any one of the adjacent sections is shorter than the width of the flow path in the direction parallel to the second direction. The moisture separation unit according to claim 1, wherein the moisture separation unit is arranged at a distance. The moisture separation unit according to claim 2, wherein the vane has a shape of a cross section perpendicular to a direction in which the vane is erected, wherein the straight line is bent one or more times. The vane has a V-shaped cross-sectional shape in a direction perpendicular to the standing direction, and the V-shaped protruding direction of the vane arranged in the section adjacent to the first direction. 4. The moisture separation unit according to claim 2, wherein the moisture separation units are arranged in opposite directions to each other. The start end position of the vane is disposed at a position upstream of the vane end position of the adjacent section located upstream with respect to the direction in which the steam flows. The moisture separation unit according to claim 4. The shape of the cross section of the pocket in a direction perpendicular to the direction in which the vane stands is a triangular shape having one side as an opening portion, according to any one of claims 2 to 5. Moisture separation unit. The shape of the cross section of the pocket in a direction perpendicular to the direction in which the vane stands is a triangular shape with an opening on one side, and the opening direction of the pocket is upstream of the direction in which the steam flows. The moisture separation unit according to any one of claims 2 to 5, wherein the moisture separation unit is directed to the side. The vane has a W-shaped cross section in a direction perpendicular to the direction in which the vane stands.
The inlet is provided on the ground side, and the outlet is provided on the ceiling side,
The shape of the cross section of the pocket in a direction perpendicular to the direction in which the vane stands is a triangular shape with an opening on one side, and the opening direction of the pocket is downstream of the direction in which the steam flows. 4. A moisture separation unit according to claim 2 or 3, wherein the moisture separation unit is directed to the side. The vane is arranged so that the shape of the cross section in the direction perpendicular to the direction of standing is W-shaped, while the bending point of the vane is in the direction of gravity,
The shape of the cross section of the pocket in a direction perpendicular to the direction in which the vane stands is a triangular shape with an opening on one side, and the pocket has an opening direction with respect to the direction in which the steam flows. The moisture separation unit according to claim 2 or 3, wherein the moisture separation unit is composed of an upstream side and a downstream side. The moisture separation unit according to claim 8 or 9, wherein the vane is provided with a plate-like return portion at an end located downstream of the direction in which the steam flows. A moisture separation apparatus comprising the moisture separation unit according to claim 1.

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