CN109966806B - Preseparator based on vertical steam-water separation reheater - Google Patents
Preseparator based on vertical steam-water separation reheater Download PDFInfo
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- CN109966806B CN109966806B CN201711462020.0A CN201711462020A CN109966806B CN 109966806 B CN109966806 B CN 109966806B CN 201711462020 A CN201711462020 A CN 201711462020A CN 109966806 B CN109966806 B CN 109966806B
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- drain pipe
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- separation
- water
- conical cover
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000000926 separation method Methods 0.000 title claims abstract description 70
- 230000008093 supporting effect Effects 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/18—Cleaning-out devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
- F22B37/266—Separator reheaters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention relates to the technical field of steam-water pre-separation, and particularly discloses a pre-separator based on a vertical steam-water separation reheater. The preseparator comprises a preseparation unit, a drain pipe and a drain pipe supporting rod, wherein the preseparation unit is fixed on a barrel of the steam-water separator reheater and faces to a steam inlet, the preseparation unit is of a curved cylindrical structure, the drain pipe is arranged at the lower end of the preseparation unit, and the drain pipe is supported and fixed by the drain pipe supporting rod. The structure is exquisite and has strong resistance to airflow impact; the whole preseparation unit is in a curved cone shape, and the circular arc streamline conical ring section design can change the steam flow direction, effectively homogenize the steam flow of the inlet of the corrugated plate separator, and meanwhile, the pressure drop loss is smaller, so that the air flow entering the MSR is uniformly distributed, and the separation and heating efficiency of the MSR is greatly improved.
Description
Technical Field
The invention belongs to the technical field of steam-water preseparators, and particularly relates to a preseparator based on a vertical steam-water separator reheater.
Background
The steam-water separation reheater (MSR) is often applied to energy industries such as nuclear power, thermal power and the like, is positioned between a high-pressure cylinder and a low-pressure cylinder of a steam turbine in a thermal loop system, and can reduce the steam humidity of the low-pressure cylinder, avoid serious erosion of blades of the steam turbine and improve the reliability of the steam turbine; on the other hand, the steam entering the downstream cylinder has a certain degree of superheat, and the efficiency of the turbine unit is improved.
The internal components of the vertical steam-water separation reheater are compact in arrangement, the space at the inlet is smaller, and if wet steam directly enters the MSR at a higher speed, uneven flow velocity in different areas of the MSR inlet can be caused, so that the separation and reheating efficiency of the whole MSR is affected. Because the vertical MSR application experience in engineering is insufficient, in order to solve the problem well, a preseparator is arranged at the MSR inlet, so that the steam flow at the inlet can be effectively and uniformly distributed, and the liquid drops with larger particle size in the wet steam can be separated in advance, thereby improving the performance of the whole MSR equipment.
Disclosure of Invention
The invention aims to provide a preseparator based on a vertical steam-water separation reheater, which can guide and separate large-particle-size liquid drops so as to improve the efficiency of the steam-water separation reheater.
The technical scheme of the invention is as follows: the preseparator comprises a preseparation unit, a drain pipe and a drain pipe supporting rod, wherein the preseparation unit is fixed on a barrel of the steam-water separator reheater and faces to a steam inlet, the preseparation unit is of a curved conical structure, the drain pipe is arranged at the lower end of the preseparation unit, and the drain pipe is supported and fixed by the drain pipe supporting rod.
The two pre-separation units are arranged up and down and are respectively arranged on the steam-water separation reheater cylinder body opposite to the steam inlet; a drain pipe A and a drain pipe B are arranged below the two pre-separation units, and a drain pipe supporting rod A and a drain pipe supporting rod B are respectively arranged in the middle of the drain pipe A and the drain pipe B; the end of the drain pipe is provided with a water seal head, so that gas in the drain pipe is prevented from being lost through a drain pipe.
The pre-separation unit comprises an annular bottom plate, a conical cover, a separation hole, a supporting plate and a central shaft tube, wherein one end of the central shaft tube is connected with the annular bottom plate with a central opening, the other end of the central shaft tube is connected with the inner side of the middle peak of the conical cover, and a narrow annular gap is formed between the outer edge of the annular bottom plate and the edge of the conical cover; a plurality of separation holes are formed in the conical cover along the circumferential direction; a plurality of supporting plates are uniformly distributed on the outer side of the conical cover, and the whole pre-separation unit is fixed on the steam-water separation reheater cylinder body through the supporting plates.
The annular bottom plate comprises a flat bottom plate and a water collecting ring groove, wherein the water collecting ring groove is of an annular groove structure with an arc-shaped cross section, and is combined with the flat bottom plate of the circular plate-shaped structure to form the annular bottom plate; the top end of the water collecting ring groove is provided with a plurality of vent holes with small round hole structures, and the bottom end of the water collecting ring groove is provided with a water draining connecting pipe.
And a plurality of support columns are uniformly distributed in the circumferential direction in a narrow annular gap between the outer edge of the annular bottom plate and the edge of the conical cover, and are welded and fixed with the outer edge of the water collecting ring groove and the edge of the conical cover respectively.
4 support columns are uniformly distributed on the annular gap; the size of the annular gap is determined according to the specification of the pre-separation unit.
The conical cover is of a concave curved conical surface structure; the separation holes are of a partial circular ring slot structure; the circles of separation holes are staggered and are spaced a certain distance in the radial direction.
The outside of the conical cover is uniformly provided with 6 supporting plates, and the supporting plates are of a central symmetrical structure.
A rib plate is arranged between the central shaft tube and the conical cover, and the direction of the rib plate is consistent with that of the supporting plate.
The one end that gusset be close to the toper cover tip be equipped with inside shrouding, inside shrouding can carry out the shutoff with the hole between gusset end and the toper cover, avoid the water that the separation of toper cover upside hole was followed the toper cover inner wall and is flowed through downside separation hole.
The invention has the remarkable effects that: the pre-separator based on the vertical steam-water separation reheater has a simple structure, is convenient to manufacture, is mainly used for vertical MSR, can be used for a small-size vertical steam-water separation reheater, and is used for laying out a compact system loop; the structure is exquisite, when the rib plates, the inner sealing plates, the conical cover and the supporting plates play roles in respective diversion and steam-water separation, the structure of the pre-separation unit is reinforced, so that the whole structure of the pre-separation unit has good strength, and the performance of the pre-separator for resisting the airflow impact can be improved; the water collecting ring groove can rapidly and efficiently collect separated liquid drops, can discharge gas mixed into the pre-separation unit, and the water is automatically discharged under the action of gravity through the water discharging connecting pipe without accumulated water; the whole preseparation unit is in a curved cone shape, and the circular arc streamline conical ring section is designed, so that the steam flow direction can be changed, the steam flow at the inlet of the corrugated plate separator is effectively uniform, and meanwhile, the pressure drop loss is small, so that the air flow entering the MSR is uniformly distributed, and the separation and heating efficiency of the MSR is greatly improved; the preseparation unit is provided with a steam-water separation gap and a steam-water separation hole, so that large-particle-size liquid drops in the steam-water mixture are separated, the steam-water separation load of the MSR is greatly reduced, and the separation efficiency of the MSR is improved.
Drawings
FIG. 1 is a schematic diagram of a preseparator based on a vertical steam-water separator reheater according to the present invention;
FIG. 2 is a schematic diagram of the preseparation unit in FIG. 1;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
in the figure: 1. a steam-water separation reheater; 2. a steam inlet; 3. a drain pipe A; 4. a drain pipe support rod A; 5. a pre-separation unit; 6. a drain pipe B; 7. a drain pipe support rod B; 8. a water seal head; 9. an exhaust hole; 10. an annular bottom plate; 11. a conical cover; 12. a support column; 13. a separation hole; 14. a support plate; 15. a water discharge connection pipe; 16. a water collecting ring groove; 17. a flat bottom plate; 18. a central shaft tube; 19. rib plates; 20. and an inner sealing plate.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1 to 5, the preseparator based on the vertical steam-water separation reheater comprises preseparation units 5, a drain pipe and a drain pipe supporting rod, wherein the two preseparation units 5 are arranged up and down, are fixedly arranged on a cylinder of the steam-water separation reheater 1 through a plurality of supporting plates 14 at positions opposite to a steam inlet 2, the preseparation units 5 are integrally of a curved conical structure, the lower ends of the two preseparation units 5 are respectively provided with a drain pipe A3 and a drain pipe B6, and a drain pipe supporting rod A4 and a drain pipe supporting rod B7 are arranged at the middle positions of the drain pipe A3 and the drain pipe B6 so as to increase the rigidity of the pipeline, eliminate the vibration of the drain pipe and avoid fatigue failure of the drain pipe; a water seal head 8 is arranged at the tail end of the drain pipe, so that gas in the drain pipe is prevented from being lost through a drain pipe; each pre-separation unit 5 is provided with an independent drain pipe, so that secondary mixing between steam and water of the pre-separation units 5 is avoided;
the preseparation unit 5 comprises an annular bottom plate 10, a conical cover 11, a separation hole 13, a supporting plate 14 and a central shaft tube 18, wherein the annular bottom plate 10 comprises a flat bottom plate 17 and a water collecting ring groove 16, the water collecting ring groove 16 is of an annular groove structure with an arc-shaped cross section, the annular groove structure is combined with the flat bottom plate 17 of a circular plate-shaped structure to form the annular bottom plate 10, a plurality of circular exhaust holes 9 are formed at the top end of the water collecting ring groove 16, and a drainage connecting tube 15 is arranged at the bottom end of the water collecting ring groove 16 to drain water collected and separated by the water collecting ring groove 16; the center of the annular bottom plate 10 is provided with a round hole, one end of the central shaft tube 18 is welded with the central round hole of the annular bottom plate 10, the other end of the central shaft tube 18 is connected with the inner side of the middle peak of the conical cover 11, a narrow annular gap exists between the outer edge of the water collecting ring groove 16 and the edge of the conical cover 11, a support column 12 is arranged on the annular gap at an interval of 90 degrees and is welded with the outer edge of the water collecting ring groove 16 and the edge of the conical cover 11 respectively, good supporting effect is achieved, the size of the annular gap is determined according to the specification of the preseparation unit 5, when the two-phase flow mixed with steam and water impacts on the conical cover 11, liquid drops with large particle size can be gathered on the outer surface of the conical cover 11 to form a water film or water drops, and the water film can be blown into a gap between the outer edge of the water collecting ring groove 16 and the edge of the conical cover 11 by air flow, and then is discharged from the water discharging connecting pipe 15. The water film or water drop can also be driven by the air flow to directly enter the hydrophobic connection pipe 15 from the separation hole 13; the conical cover 11 is of a concave curved surface conical surface structure, a plurality of separation holes 13 are formed in the conical surface of the conical cover 11 along the circumferential direction, the separation holes 13 are of a partial circular slotted hole structure, and the separation holes 13 are staggered with each other and are spaced a certain distance along the radial direction, so that the strength of the whole conical cover 11 is not influenced; 6 support plates 14 are uniformly distributed on the outer side of the conical cover 11, the support plates 14 are of a central symmetrical structure, the included angle between any two adjacent support plates 14 is 60 degrees, and the whole pre-separation unit 5 is fixed on the cylinder of the steam-water separation reheater 1 through the support plates 14; 6 rib plates 19 are arranged between the central shaft tube 18 and the conical cover 11, and the positions of the rib plates 19 are consistent with those of the supporting plate 14; an inner sealing plate 20 is arranged at one end of the rib plate 19 close to the tip of the conical cover 11, and the inner sealing plate 20 seals the pores between the tail end of the rib plate 19 and the conical cover 11, so that water separated from the separation hole 13 at the upper side of the conical cover 11 is prevented from flowing out along the inner wall of the conical cover 11 through the separation hole 13 at the lower side; after the inner sealing plate 20 is arranged, the water separated from the upper side of the conical cover 11 flows to the drainage connecting pipe 15 along the groove formed between the rib plate 19 and the central shaft tube 18;
in the preseparator based on the vertical steam-water separation reheater, as the outer side of the conical cover 11 is provided with the plurality of separation holes 13, when a steam-water mixture impacts the separation holes 13 on the conical cover 11 at a certain speed, large-particle-size liquid drops are partially condensed at the periphery of the separation holes 13, and mixed air flows are dispersed along the tangential direction of the curved conical cover 11; another small part of the mixed gas flow enters the inside of the pre-separation unit 5 along the separation hole 13, after the gas component is swirled in the inside, the gas component is discharged from the top exhaust hole 9, and condensed large-particle-size liquid drops directly enter the drainage connection pipe 15 along the inner wall.
Claims (9)
1. A preseparator based on vertical steam-water separation reheater, its characterized in that: the preseparator comprises a preseparation unit (5), a drain pipe and a drain pipe supporting rod, wherein the preseparation unit (5) is fixed on a cylinder body of the steam-water separation reheater (1) and is opposite to the steam inlet (2), the preseparation unit (5) is of a curved conical structure, the drain pipe is arranged at the lower end of the preseparation unit (5), and the drain pipe is supported and fixed by the drain pipe supporting rod; the pre-separation unit (5) comprises an annular bottom plate (10), a conical cover (11), a separation hole (13), a supporting plate (14) and a central shaft tube (18), wherein one end of the central shaft tube (18) is connected with the annular bottom plate (10) with a central opening, the other end of the central shaft tube (18) is connected with the inner side of the middle peak of the conical cover (11), and a narrow annular gap is formed between the outer edge of the annular bottom plate (10) and the edge of the conical cover (11); a plurality of separation holes (13) are formed on the conical cover (11) along the circumferential direction; a plurality of support plates (14) are uniformly distributed on the outer side of the conical cover (11), and the whole pre-separation unit (5) is fixed on the cylinder of the steam-water separation reheater (1) through the support plates (14).
2. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: the two pre-separation units (5) are arranged up and down and are respectively arranged on the barrel of the steam-water separator reheater (1) opposite to the steam inlet (2); a drain pipe A (3) and a drain pipe B (6) are arranged below the two pre-separation units (5), and a drain pipe supporting rod A (4) and a drain pipe supporting rod B (7) are respectively arranged at the middle positions of the drain pipe A (3) and the drain pipe B (6); the end of the drain pipe is provided with a water seal head (8) to prevent gas in the drain pipe from being lost through the drain pipe.
3. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: the annular bottom plate (10) comprises a flat bottom plate (17) and a water collecting ring groove (16), wherein the water collecting ring groove (16) is of an annular groove structure with an arc-shaped cross section, and the annular groove structure is combined with the flat bottom plate (17) of the circular plate-shaped structure to form the annular bottom plate (10); the top end of the water collecting ring groove (16) is provided with a plurality of exhaust holes (9) with small round hole structures, and the bottom end of the water collecting ring groove (16) is provided with a water discharging connecting pipe (15).
4. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: a plurality of support columns (12) are uniformly distributed circumferentially on a narrow annular gap between the outer edge of the annular bottom plate (10) and the edge of the conical cover (11), and the support columns (12) are welded and fixed with the outer edge of the water collecting ring groove (16) and the edge of the conical cover (11) respectively.
5. The vertical steam and water separator reheater based preseparator according to claim 4, wherein: 4 support columns (12) are uniformly distributed on the annular gap; the size of the annular gap is determined according to the specification of the pre-separation unit (5).
6. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: the conical cover (11) is of a concave curved conical surface structure; the separation holes (13) are of a partial circular ring slot structure; the plurality of circles of separation holes (13) are staggered and radially spaced apart.
7. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: the outer side of the conical cover (11) is uniformly provided with 6 supporting plates (14), and the supporting plates (14) are of a central symmetrical structure.
8. The vertical steam-water separator reheater based preseparator according to claim 1, wherein: a rib plate (19) is arranged between the central shaft tube (18) and the conical cover (11), and the direction of the rib plate (19) is consistent with that of the supporting plate (14).
9. The vertical steam and water separator reheater based preseparator as set forth in claim 8, wherein: one end of the rib plate (19) close to the tip of the conical cover (11) is provided with an inner sealing plate (20), and the inner sealing plate (20) can seal the holes between the tail end of the rib plate (19) and the conical cover (11) so as to prevent water separated from the separation holes (13) on the upper side of the conical cover (11) from flowing out along the inner wall of the conical cover (11) through the separation holes (13) on the lower side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462020.0A CN109966806B (en) | 2017-12-28 | 2017-12-28 | Preseparator based on vertical steam-water separation reheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462020.0A CN109966806B (en) | 2017-12-28 | 2017-12-28 | Preseparator based on vertical steam-water separation reheater |
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| Publication Number | Publication Date |
|---|---|
| CN109966806A CN109966806A (en) | 2019-07-05 |
| CN109966806B true CN109966806B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711462020.0A Active CN109966806B (en) | 2017-12-28 | 2017-12-28 | Preseparator based on vertical steam-water separation reheater |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016835A (en) * | 1975-08-01 | 1977-04-12 | Southwestern Engineering Company | Moisture separator-reheater |
| GB1501983A (en) * | 1975-03-26 | 1978-02-22 | Artemov L | Liquid-gas separators |
| GB2006939A (en) * | 1977-10-17 | 1979-05-10 | Stein Industrie | A Vertical Steam Separator- Superheater |
| US4156403A (en) * | 1976-12-08 | 1979-05-29 | Stein Industrie | Steam superheater-separator with bleeding of saturated dry steam |
| US4273077A (en) * | 1978-10-18 | 1981-06-16 | Stein Industrie | Vertical steam separator-superheater |
| US4629481A (en) * | 1985-01-18 | 1986-12-16 | Westinghouse Electric Corp. | Low pressure drop modular centrifugal moisture separator |
| US4803841A (en) * | 1987-09-30 | 1989-02-14 | Westinghouse Electric Corp. | Moisture separator for steam turbine exhaust |
| CN105148623A (en) * | 2015-08-27 | 2015-12-16 | 苏州创时云能源科技有限公司 | Rotary blade type dynamic steam-water separator with controllable rotational speeds |
| CN207980667U (en) * | 2017-12-28 | 2018-10-19 | 核动力运行研究所 | A kind of preseparator based on vertical separator |
-
2017
- 2017-12-28 CN CN201711462020.0A patent/CN109966806B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501983A (en) * | 1975-03-26 | 1978-02-22 | Artemov L | Liquid-gas separators |
| US4016835A (en) * | 1975-08-01 | 1977-04-12 | Southwestern Engineering Company | Moisture separator-reheater |
| US4156403A (en) * | 1976-12-08 | 1979-05-29 | Stein Industrie | Steam superheater-separator with bleeding of saturated dry steam |
| GB2006939A (en) * | 1977-10-17 | 1979-05-10 | Stein Industrie | A Vertical Steam Separator- Superheater |
| US4273077A (en) * | 1978-10-18 | 1981-06-16 | Stein Industrie | Vertical steam separator-superheater |
| US4629481A (en) * | 1985-01-18 | 1986-12-16 | Westinghouse Electric Corp. | Low pressure drop modular centrifugal moisture separator |
| US4803841A (en) * | 1987-09-30 | 1989-02-14 | Westinghouse Electric Corp. | Moisture separator for steam turbine exhaust |
| CN105148623A (en) * | 2015-08-27 | 2015-12-16 | 苏州创时云能源科技有限公司 | Rotary blade type dynamic steam-water separator with controllable rotational speeds |
| CN207980667U (en) * | 2017-12-28 | 2018-10-19 | 核动力运行研究所 | A kind of preseparator based on vertical separator |
Non-Patent Citations (1)
| Title |
|---|
| "核电站汽水分离再热器管系组件关键制造工艺技术的研究与优化";李胜道;中国优秀硕士学位论文全文数据库工程科技Ⅱ辑;第4-8页 * |
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| CN109966806A (en) | 2019-07-05 |
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