CN114152103B - Condenser for axial exhaust steam turbine - Google Patents
Condenser for axial exhaust steam turbine Download PDFInfo
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- CN114152103B CN114152103B CN202111369206.8A CN202111369206A CN114152103B CN 114152103 B CN114152103 B CN 114152103B CN 202111369206 A CN202111369206 A CN 202111369206A CN 114152103 B CN114152103 B CN 114152103B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 62
- 238000001816 cooling Methods 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004781 supercooling Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a condenser for an axial exhaust steam turbine, which comprises a condenser shell and a throat part laterally arranged on the condenser shell, wherein the exhaust axis of the steam turbine is set to be x-direction, the throat part is set along the x-direction, a condenser front end tube plate and a condenser rear end tube plate are respectively arranged on two sides of the outer wall of the condenser shell, a middle tube plate is fixed in the condenser shell, a hot well is arranged at the bottom of the condenser shell, an expansion joint component for balancing vacuum force and absorbing axial thermal displacement is arranged on the condenser shell, a full-arc front water chamber is arranged on the condenser front end tube plate, a full-arc rear water chamber is arranged on the condenser rear end tube plate, and a plurality of tube bundle groups are arranged on the middle tube plate. The invention has the advantages of high heat exchange efficiency, small air resistance, low supercooling degree of condensed water and the like, the steam flow field is uniform and has no vortex, the thermal load is uniformly distributed, and the expansion joint component is arranged to offset and balance the vacuum thrust, so that the excessive thrust is not caused to the steam turbine.
Description
Technical Field
The invention relates to the technical field of steam turbine condensers, in particular to a condenser for an axial exhaust steam turbine.
Background
Along with the strong promotion of carbon emission reduction in China, compared with the traditional gas-steam combined cycle unit with less carbon emission and higher comprehensive efficiency, the market share of the gas-steam combined cycle unit in the field of thermal power generation is gradually increased, the axial exhaust steam turbine with lower overall investment and more compact arrangement is more popular in the gas-steam combined cycle power generation market, and a condenser matched with the axial exhaust steam turbine is used as a cold source in the thermal cycle of a steam turbine device. The condenser for axial exhaust steam turbine is a shell-and-tube heat exchanger, which is used for condensing exhaust steam exhausted by low pressure cylinder of turbine into water and maintaining a certain vacuum value in the exhaust port of turbine. Whether the condenser cooling tube bundle is arranged reasonably or not has an important influence on the steam condensation process, and has a great influence on the heat exchange performance and the energy consumption of the unit. Unreasonable arrangement of the tube bundles will cause unreasonable steam flow fields, thereby causing uneven heat load distribution, local air accumulation, excessive flow resistance, large supercooling degree, air leakage (uncondensed steam directly enters an air cooling zone) and the like.
Therefore, reasonable tube bundle arrangement is the basis for ensuring the performance of the lateral steam inlet condenser. Research shows that the actual condenser vacuum degree of unreasonable lateral inlet steam condenser tube bundle arrangement and the vacuum degree calculated according to HEI standard can be different by more than 1KPa, and the output and economy of the unit are directly and obviously affected. Reasonable condenser tube bundle arrangement is adopted, and the energy-saving benefit of the unit is obvious.
The existing lateral steam inlet condenser has fewer tube distribution modes, more or less problems of large shell side flow resistance, large supercooling degree and the like, and the actual heat transfer coefficient is not ideal. The existing lower exhaust steam condenser is not compact in most of pipe distribution modes, and the investment of the lateral steam inlet condenser is obviously increased if the lower exhaust steam condenser is directly inverted and used for the lateral steam inlet condenser.
When the unit is in operation, the operation pressure of the condenser is lower than the atmospheric pressure, the condenser is a negative pressure container, the condenser shell part must reach enough strength to ensure that the condenser is not deformed by pressure during operation, and a wave expansion joint with the rigidity far lower than that of the condenser shell part is additionally arranged between the steam turbine and the condenser, so that the condenser can receive vacuum thrust caused by the atmospheric pressure and the pressure difference of the condenser, and the size of the wave expansion joint is the product of the difference delta P of the atmospheric pressure and the operation pressure of the condenser and the area S of an exhaust port of the steam turbine. Taking a conventional 20-kilowatt gas-steam combined cycle turbine as an example, the value of the turbine can reach as large as 2000KN, and if the thrust is allowed to act on the turbine, the turbine can be at great risk for safe and stable operation. The condenser needs to reduce the influence of the thermal expansion of the condenser on the steam turbine as much as possible when the unit operates, wherein an effective method is to additionally install a pressure balance type waveform expansion joint compensator between a steam turbine exhaust port and the condenser, absorb the thermal expansion of the condenser in all directions, and ensure that the unit operates more safely and reliably.
Disclosure of Invention
Aiming at the problems that the existing lateral steam inlet condenser has few pipe distribution modes, the lower steam outlet condenser pipe bundle is directly inverted to be used in the lateral steam inlet condenser, the effect is not ideal, the arrangement is unreasonable and compact, the investment is increased, and the negative pressure blind plate force exists after the thermal displacement of the condenser is absorbed by an expansion joint, the invention provides the condenser for the axial steam outlet turbine.
The embodiment of the invention is realized by the following technical scheme: the condenser for the axial exhaust steam turbine comprises a condenser shell and a throat part which is laterally arranged on the condenser shell, wherein the exhaust axial direction of the steam turbine is set to be x direction, the throat part is arranged along the x direction, a condenser front end tube plate and a condenser rear end tube plate are respectively arranged on two sides of the outer wall of the condenser shell, a middle tube plate is fixed in the condenser shell, a thermal well is arranged at the bottom of the condenser shell, an expansion joint component for balancing vacuum force and absorbing axial thermal displacement is arranged on the condenser shell, and the expansion joint component comprises a front sealing expansion joint component and a rear sealing expansion joint component; the front sealing expansion joint component is arranged at one end of the throat part far away from the condenser shell, the front sealing expansion joint component is connected with a plurality of compression bars, the length direction of the compression bars is along the x direction, one end of the compression bars far away from the front sealing expansion joint component enters the condenser shell from the throat part and then penetrates out of the condenser shell, and the rear sealing expansion joint component is arranged at one end of the compression bars far away from the front sealing expansion joint component; the condenser front end tube plate is provided with a full-arc front water chamber, the condenser rear end tube plate is provided with a full-arc rear water chamber, and the middle tube plate is provided with a plurality of tube bundle groups.
Further, the tube bundle group comprises a plurality of heat exchange tubes, the front end tube bundle area, the rear end tube bundle area and the air cooling tube bundle area are formed by arranging the heat exchange tubes, the front end tube bundle area, the rear end tube bundle area and the air cooling tube bundle area are sequentially arranged in the inner cavity of the condenser shell along the x direction, and the air cooling tube bundle area is provided with an air exhausting port.
Further, the front end tube bundle zone comprises a pair of v-shaped tube bundle zones, the v-shaped tube bundle zones are vertically symmetrically arranged about the central line of the tube bundle, a front middle steam channel is arranged in the v-shaped tube bundle zone along the x direction, the tip end of the v-shaped tube bundle zone faces the throat, the adjacent side edges of the v-shaped tube bundle zones are connected, and one end of the v-shaped tube bundle zone, which is far away from the throat, is connected with the rear end tube bundle zone;
Further, the rear end tube bundle region comprises a pair of flank tube bundle regions which are vertically symmetrically arranged about the tube bundle center line, the pair of flank tube bundle regions are respectively connected with the adjacent v-shaped tube bundle regions, a rear middle steam channel is formed between the pair of flank tube bundle regions, the front middle steam channel is communicated with the rear middle steam channel, and the air cooling tube bundle regions are embedded at the tail ends of the pair of flank tube bundle regions.
Further, the front sealing expansion joint assembly comprises a flow guide pipe, a front expansion joint and a throat sealing plate which are sequentially and fixedly connected along the x direction, the flow guide pipe is matched with the exhaust port of the steam turbine, the outer wall of the flow guide pipe is provided with a flange for being fixed with the exhaust port of the steam turbine, the throat sealing plate is hermetically arranged on the condenser shell, the throat sealing plate is provided with a through hole, the through hole is communicated with the inside of the condenser shell, and the pressure lever is fixedly connected with the flow guide pipe;
Further, the back sealing expansion joint assembly comprises a back sealing plate and a back expansion joint which are sequentially and fixedly connected along the x direction, the back sealing plate is arranged at the rear end of the condenser shell in a sealing mode, and the pressure rod is fixedly connected with the back sealing plate.
Further, the number of the tube bundle groups is four, and the four tube bundle groups are sequentially arranged from top to bottom.
Further, the throat is configured with a square manhole.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
According to the invention, the expansion joint assembly is configured, the compression bar is arranged to connect the front sealing expansion joint assembly and the rear sealing expansion joint assembly, so that the negative pressure vacuum thrust generated by the condenser on the steam turbine is counteracted, when the negative pressure vacuum thrust acts on the front sealing expansion joint assembly from the air inlet of the throat part of the condenser, the front sealing expansion joint assembly is stressed to balance the vacuum thrust through the compression bar by the rear sealing expansion joint assembly, thereby avoiding the occurrence of the condition that the steam turbine suffers from excessive vacuum thrust, and ensuring the safe and stable operation of the steam turbine; and through the mode that the pressure lever passes through from the condenser inside, ingenious saving the arrangement space, saved manufacturing material and investment cost. The tube bundle distribution mode adopted by the invention has the advantages of high heat exchange efficiency, small air resistance, low condensate supercooling degree and the like, the steam flow field in the condenser is straight, the deflection is less, the flow field is uniform and vortex-free, the shell side steam resistance is small, the heat load is uniformly distributed, the heat transfer coefficient and the operation vacuum degree of the condenser are higher, the heat transfer coefficient can be improved by more than 20 percent compared with the common tube distribution scheme, the calculated value is 10 to 20 percent higher than the calculated value according to HEI, the shell side steam resistance is 40 to 60 percent of that of the common tube bundle (under the condition of no air leakage), and the energy saving effect of the unit is obvious.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of another embodiment of the present invention;
FIG. 4 is a schematic view of the tube bundle of the present invention;
FIG. 5 is a schematic view of an expansion joint assembly according to the present invention;
Icon: 1-condenser shell, 2-throat, 21-square manhole, 31-condenser front end tube plate, 32-condenser rear end tube plate, 33-middle tube plate, 4-hot well, 51-front seal expansion joint assembly, 511-honeycomb duct, 512-front expansion joint, 513-throat sealing plate, 514-flange, 52-rear seal expansion joint assembly, 521-rear sealing plate, 522-rear expansion joint, 53-compression bar, 61-full-arc front water chamber, 62-full-arc rear water chamber, 7-tube bundle group, 71-front end tube bundle region, 711-v-shaped tube bundle region, 712-front middle steam channel, 72-rear end tube bundle region, 721-flank tube bundle region, 7210-air inlet gap, 722-rear middle steam channel, 73-air cooling tube bundle region and 8-tube bundle center line.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to 5, the embodiment provides a condenser for an axial exhaust steam turbine, including a condenser housing 1 and a throat 2 laterally configured in the condenser housing 1, the throat 2 is configured with a square manhole 21 to facilitate maintenance work, an exhaust axis of the steam turbine is set as an x direction, the throat 2 is set along the x direction, two sides of an outer wall of the condenser housing 1 are respectively configured with a condenser front end tube plate 31 and a condenser rear end tube plate 32, the condenser front end tube plate 31 is configured with a full-arc front water chamber 61, the condenser rear end tube plate 32 is configured with a full-arc rear water chamber 62, and the full-arc front water chamber 61 and the full-arc rear water chamber 62 both adopt a "mongolian" type full-arc water chamber, compared with a common water chamber, the structural strength is high, and because the full-arc water chamber is compared with a common water chamber, a streamline vortex area is smooth without sediment, a ball cleaning device has high ball collecting rate, and the circulating water resistance is small; an intermediate tube plate 33 is fixed in the condenser shell 1, the intermediate tube plate 33 is provided with a plurality of tube bundle groups 7, and the tube bundle groups 7 play a role in condensing exhaust gas of the steam turbine; the bottom of the condenser shell 1 is provided with a thermal well 4 for collecting condensed water at the bottom of the condenser shell 1, and the condenser shell 1 is provided with an expansion joint assembly for balancing vacuum force and absorbing axial thermal displacement, wherein the expansion joint assembly comprises a front sealing expansion joint assembly 51 and a rear sealing expansion joint assembly 52; the front sealing expansion joint assembly 51 is configured at one end of the throat 2 far away from the condenser shell 1, the front sealing expansion joint assembly 51 is connected with a plurality of pressure rods 53, the length direction of the pressure rods 53 is along the x direction, one end of the pressure rods 53 far away from the front sealing expansion joint assembly 51 enters the condenser shell 1 from the throat 2 and then passes out of the condenser shell 1, and the rear sealing expansion joint assembly 52 is configured at one end of the pressure rods 53 far away from the front sealing expansion joint assembly 51; the front sealing expansion joint assembly 51 and the rear sealing expansion joint assembly 52 are connected through the configuration of the compression rod 53, so that negative pressure vacuum thrust generated by the condenser on the steam turbine is counteracted, and when the negative pressure vacuum thrust acts on the front sealing expansion joint assembly 51 from the air inlet of the throat 2 of the condenser, the front sealing expansion joint assembly 51 is stressed and the rear sealing expansion joint assembly 52 balances the vacuum thrust through the compression rod 53, so that the condition that the steam turbine suffers from excessive vacuum thrust is avoided, and the safe and stable operation of the steam turbine is ensured; and through the mode that the pressure lever 53 passes through from the condenser inside, ingenious saving the arrangement space, saved manufacturing material.
Further, in this embodiment, the tube bundle group 7 includes a plurality of heat exchange tubes, where the plurality of heat exchange tubes form a front end tube bundle area 71, a rear end tube bundle area 72, and an air cooling tube bundle area 73, and heat exchange tubes passing through the peripheries of the front end tube bundle area 71, the rear end tube bundle area 72, and the air cooling tube bundle area 73 form a specific shape, where the front end tube bundle area 71, the rear end tube bundle area 72, and the air cooling tube bundle area 73 are sequentially disposed in the inner cavity of the condenser shell 1 along the x-direction, and the tube bundles of the air cooling tube bundle area 733 occupy 5% -7% of the total number of the whole tube bundles, and the air cooling tube bundle area 73 is configured with an air evacuation port. The air exhausting port is used for connecting an air exhausting system through a pipe fitting, the air exhausting system is used for exhausting the exhaust steam which is not sufficiently cooled and condensed and the non-condensed gas, so that the subsequent steam is conveniently introduced, the condenser maintains a certain vacuum degree, and unsmooth exhaust steam caused by overlarge pressure in the inner cavity of the condenser is avoided, and the unit efficiency is reduced. The front end tube bundle area 71, the rear end tube bundle area 72 and the air cooling tube bundle area 73 are sequentially arranged along the exhaust axial direction of the steam turbine in the x direction, so that after exhaust gas enters the inner cavity of the condenser shell 1, the exhaust gas is condensed through the front end tube bundle area 71 and the rear end tube bundle area 72 in sequence, the steam flow field in the condenser is straight, the deflection is less, the streamline is uniform, no vortex exists when the steam flows, the steam is fully condensed before entering the air cooling tube bundle, and finally the exhaust gas is pumped out through the exhaust gas port of the air cooling tube bundle area 73 positioned at the tail end, and the overall heat transfer coefficient of the condenser is high.
Further, in this embodiment, the front end tube bundle section 71 includes a pair of v-shaped tube bundle sections 711, the pair of v-shaped tube bundle sections 711 are disposed symmetrically up and down about the tube bundle center line 8, a front middle steam duct 712 is disposed in the v-shaped tube bundle section 711 in the x-direction, the tip of the v-shaped tube bundle section 711 faces the throat 2, and adjacent sides of the pair of v-shaped tube bundle sections 711 are connected, and an end of the v-shaped tube bundle section 711 remote from the throat 2 is connected to the rear end tube bundle section 72; by configuring the front tube bundle region 71 as a pair of v-shaped tube bundle regions 711, the exhaust gas entering the condenser is firstly contacted with the tips of the v-shaped tube bundle regions 711, so that the heat exchange area is increased while the resistance generated by the front tube bundle region 71 and steam is reduced, the overall heat exchange efficiency of the condenser is improved, and the steam flow lines in the condenser shell 1 are uniform. By arranging the front middle steam channel 712 along the exhaust direction, the inside of the front tube bundle area 71 also ensures the characteristics of straight steam flow lines and less deflection, so that the steam flow is free from vortex, and the structure is simple, but the higher heat transfer coefficient is ensured;
The rear end tube bundle section 72 includes a pair of side wing tube bundle sections 721, the pair of side wing tube bundle sections 721 are disposed vertically symmetrically about a tube bundle center line 8, the pair of side wing tube bundle sections 721 are respectively connected to v-shaped tube bundle sections 711 adjacent thereto, a rear middle steam passage 722 is formed between the pair of side wing tube bundle sections 721, a front middle steam passage 712 is communicated with the rear middle steam passage 722, the air cooling tube bundle section 73 is embedded at the ends of the pair of side wing tube bundle sections 721 in the x-axis direction, the air cooling tube bundle section 73 is located at the ends of the side wing tube bundle sections 721, the pair of side wing tube bundle sections 721 are clamped and located at both sides of the air cooling tube bundle section 73, the side wing tube bundle sections 721 are provided with a plurality of air inlet notches 7210, by configuring the air inlet notches 7210, steam located at both sides of the front end tube bundle section 71 can enter the tube bundle section 721 from the side wing tube bundle sections 721 to be unobstructed, and heat exchange efficiency is improved. By configuring the rear tube bundle section 72 as a pair of flanking tube bundle sections 721, the structure is simple and compact, the tubes are conveniently distributed, and the higher heat transfer coefficient is ensured, and the front middle steam passage 712, the rear middle steam passage 722 and the air-cooled tube bundle section 73 are axially arranged along x and positioned in the tube bundle group 7, so that steam flows straight and has less deflection in the tube bundle group 7, no vortex is generated in the tube bundle group 7, and high efficiency and high heat transfer coefficient are ensured.
The front sealing expansion joint assembly 51 comprises a flow guiding pipe 511, a front expansion joint 512 and a throat sealing plate 513 which are sequentially and fixedly connected along the x direction, the flow guiding pipe 511 is matched with a steam turbine exhaust port, a flange 514 for being fixed with the steam turbine exhaust port is arranged on the outer wall of the flow guiding pipe 511, the flange 514 is matched with the steam turbine exhaust port, the connection and the installation are convenient, and the structural strength is good; the throat sealing plate 513 is arranged on the air inlet of the condenser in a sealing way, the throat sealing plate 513 is provided with a through hole which is communicated with the inside of the condenser shell 1, and the pressure lever 53 is fixedly connected with the flow guide pipe 511; the rear sealing expansion joint assembly 52 includes a rear sealing plate 521 and a rear expansion joint 522 that are fixedly connected in sequence along the x direction, the rear sealing plate 521 is configured at the rear end of the condenser housing 1 in a sealing manner, and the pressure lever 53 is fixedly connected with the rear sealing plate 521. By providing the draft tube 511, throat seal plate 513 and rear seal plate 521, structural strength is increased and service life is increased.
In this embodiment, the number of the tube bundle groups 7 is four, and the four tube bundle groups 7 are sequentially arranged from top to bottom.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a condenser for axial exhaust steam turbine, includes condenser casing (1) and side direction configuration in throat (2) of condenser casing (1), establishes turbine exhaust axial and is X to, and this throat (2) are followed X and are set up, condenser casing (1) outer wall both sides are provided with condenser front end tube sheet (31) and condenser rear end tube sheet (32) respectively, condenser casing (1) internal fixation has middle tube sheet (33), and condenser casing (1) bottom is provided with hot well (4), its characterized in that:
The condenser shell (1) is provided with an expansion joint assembly for balancing vacuum force and absorbing axial thermal displacement, and the expansion joint assembly comprises a front sealing expansion joint assembly (51) and a rear sealing expansion joint assembly (52); the front sealing expansion joint assembly (51) is arranged at one end of the throat part (2) far away from the condenser shell (1), the front sealing expansion joint assembly (51) is connected with a plurality of pressure rods (53), the length direction of the pressure rods (53) is along the x direction, one end of the pressure rods (53) far away from the front sealing expansion joint assembly (51) enters the condenser shell (1) from the throat part (2) and then penetrates out of the condenser shell (1), and the rear sealing expansion joint assembly (52) is arranged at one end of the pressure rods (53) far away from the front sealing expansion joint assembly (51);
The condenser front end tube plate (31) is provided with a full-arc front water chamber (61), the condenser rear end tube plate (32) is provided with a full-arc rear water chamber (62), and the middle tube plate (33) is provided with a plurality of tube bundle groups (7);
The tube bundle group (7) comprises a plurality of heat exchange tubes, wherein the heat exchange tubes are distributed to form a front end tube bundle area (71), a rear end tube bundle area (72) and an air cooling tube bundle area (73), the front end tube bundle area (71), the rear end tube bundle area (72) and the air cooling tube bundle area (73) are sequentially arranged in the inner cavity of the condenser shell (1) along the x direction, and the air cooling tube bundle area (73) is provided with an air evacuation port;
The front sealing expansion joint assembly (51) comprises a flow guide pipe (511), a front expansion joint (512) and a throat sealing plate (531) which are sequentially and fixedly connected along the x direction, the flow guide pipe (511) is matched with a steam turbine exhaust port, a flange (514) used for being fixed with the steam turbine exhaust port is arranged on the outer wall of the flow guide pipe (511), the throat sealing plate (531) is arranged on the condenser shell (1) in a sealing mode, the throat sealing plate (531) is provided with a through hole, the through hole is communicated with the inside of the condenser shell (1), and the compression rod (53) is fixedly connected with the flow guide pipe (511);
the rear sealing expansion joint assembly (52) comprises a rear sealing plate (521) and a rear expansion joint (522) which are sequentially and fixedly connected along the x direction, the rear sealing plate (521) is arranged at the rear end of the condenser shell (1) in a sealing mode, and the pressure rod (53) is fixedly connected with the rear sealing plate (521).
2. A condenser for an axial exhaust steam turbine according to claim 1, wherein the front end tube bundle section (71) includes a pair of v-shaped tube bundle sections (711), the pair of v-shaped tube bundle sections (711) being disposed symmetrically up and down with respect to a tube bundle center line (8), a front intermediate steam duct (712) being disposed in the v-shaped tube bundle section (711) in the x-direction, a tip of the v-shaped tube bundle section (711) being directed toward the throat section (2), and adjacent sides of the pair of v-shaped tube bundle sections (711) being joined, an end of the v-shaped tube bundle section (711) remote from the throat section (2) being joined to the rear end tube bundle section (72);
the rear end tube bundle region (72) comprises a pair of flank tube bundle regions (721), the pair of flank tube bundle regions (721) are arranged symmetrically up and down about a tube bundle center line (8), the pair of flank tube bundle regions (721) are respectively connected with the adjacent v-shaped tube bundle regions (711), a rear middle steam channel (722) is formed between the pair of flank tube bundle regions (721), the front middle steam channel (712) is communicated with the rear middle steam channel (722), and the air cooling tube bundle region (73) is embedded at the tail ends of the pair of flank tube bundle regions (721).
3. The condenser for an axial exhaust steam turbine according to claim 1, wherein the number of the tube bundle groups (7) is four, and the four tube bundle groups (7) are sequentially arranged from top to bottom.
4. A condenser for an axial exhaust steam turbine according to claim 1, wherein the throat (2) is provided with a square manhole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369206.8A CN114152103B (en) | 2021-11-18 | 2021-11-18 | Condenser for axial exhaust steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369206.8A CN114152103B (en) | 2021-11-18 | 2021-11-18 | Condenser for axial exhaust steam turbine |
Publications (2)
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| JPS556192A (en) * | 1978-06-27 | 1980-01-17 | Westinghouse Electric Corp | Apparatus for compensating for pressure and load on condenser |
| JPH05196373A (en) * | 1992-01-06 | 1993-08-06 | Hitachi Ltd | Condenser |
| CN103851297A (en) * | 2014-03-18 | 2014-06-11 | 江苏星光波纹管有限公司 | Horizontal type expansion joint of double large draw bar |
| CN204062304U (en) * | 2014-07-18 | 2014-12-31 | 邵军 | Straight pipe pressure-balancing type expansion joint |
| CN106288844A (en) * | 2016-09-27 | 2017-01-04 | 德阳东汽电站机械制造有限公司 | Vapour spike condenser is drawn in a kind of threeway |
| CN106323026A (en) * | 2016-09-28 | 2017-01-11 | 青岛捷能汽轮机集团股份有限公司 | Horizontal axial exhaust condenser |
| CN207298200U (en) * | 2017-09-05 | 2018-05-01 | 洛阳双瑞特种装备有限公司 | A kind of new super-large diameter bend pipe pressure balance type expansion joint |
| CN212430130U (en) * | 2020-04-03 | 2021-01-29 | 洛阳双瑞特种装备有限公司 | Constraint type corrugated pipe expansion joint capable of compensating axial displacement |
| CN216482348U (en) * | 2021-11-18 | 2022-05-10 | 广州海恩能源技术有限公司 | Condenser for axial exhaust steam turbine |
-
2021
- 2021-11-18 CN CN202111369206.8A patent/CN114152103B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0006338A1 (en) * | 1978-06-15 | 1980-01-09 | Westinghouse Electric Corporation | Apparatus including a turbine, a condenser and a support arrangement therefor |
| JPS556192A (en) * | 1978-06-27 | 1980-01-17 | Westinghouse Electric Corp | Apparatus for compensating for pressure and load on condenser |
| JPH05196373A (en) * | 1992-01-06 | 1993-08-06 | Hitachi Ltd | Condenser |
| CN103851297A (en) * | 2014-03-18 | 2014-06-11 | 江苏星光波纹管有限公司 | Horizontal type expansion joint of double large draw bar |
| CN204062304U (en) * | 2014-07-18 | 2014-12-31 | 邵军 | Straight pipe pressure-balancing type expansion joint |
| CN106288844A (en) * | 2016-09-27 | 2017-01-04 | 德阳东汽电站机械制造有限公司 | Vapour spike condenser is drawn in a kind of threeway |
| CN106323026A (en) * | 2016-09-28 | 2017-01-11 | 青岛捷能汽轮机集团股份有限公司 | Horizontal axial exhaust condenser |
| CN207298200U (en) * | 2017-09-05 | 2018-05-01 | 洛阳双瑞特种装备有限公司 | A kind of new super-large diameter bend pipe pressure balance type expansion joint |
| CN212430130U (en) * | 2020-04-03 | 2021-01-29 | 洛阳双瑞特种装备有限公司 | Constraint type corrugated pipe expansion joint capable of compensating axial displacement |
| CN216482348U (en) * | 2021-11-18 | 2022-05-10 | 广州海恩能源技术有限公司 | Condenser for axial exhaust steam turbine |
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| CN114152103A (en) | 2022-03-08 |
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