CN114152103A - Condenser for axial exhaust steam turbine - Google Patents
Condenser for axial exhaust steam turbine Download PDFInfo
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- CN114152103A CN114152103A CN202111369206.8A CN202111369206A CN114152103A CN 114152103 A CN114152103 A CN 114152103A CN 202111369206 A CN202111369206 A CN 202111369206A CN 114152103 A CN114152103 A CN 114152103A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 59
- 238000001816 cooling Methods 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004781 supercooling Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 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
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 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
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003825 pressing 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
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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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- 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 axial direction of the steam turbine is set to be the 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 hot well is arranged at the bottom of the condenser shell, an expansion joint component used 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 condensate supercooling degree and the like, the steam flow field is uniform and has no vortex, the heat load distribution is uniform, and the expansion joint assembly is arranged to offset and balance the vacuum thrust without causing overlarge thrust 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 vigorous promotion of the state on carbon emission reduction, the market share of a gas-steam combined cycle unit with less carbon emission and higher comprehensive efficiency in the field of thermal power generation is gradually improved compared with the traditional coal-electricity turbine, an 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 plays a role of a cold source in the thermal cycle of a steam turbine device. The condenser for axial steam exhaust turbine is a shell-and-tube heat exchanger, and its function is to condense the exhausted steam exhausted from low-pressure cylinder of turbine into water and to establish and maintain a certain vacuum value at the steam exhaust outlet of turbine. Whether the arrangement of the cooling tube bundle of the condenser is reasonable or not has important influence on the steam condensation process and has great influence on the heat exchange performance and the energy consumption of a unit. The unreasonable arrangement of the tube bundles will cause the unreasonable arrangement of the steam flow field, thereby bringing about uneven heat load distribution, local air accumulation, overlarge flow resistance, large supercooling degree, air leakage (uncondensed steam directly enters an air cooling area), and the like.
Therefore, the reasonable arrangement of the tube bundles is the basis for ensuring the performance of the lateral steam inlet condenser. Research shows that the actual vacuum degree of the condenser in unreasonable arrangement of the lateral steam inlet condenser pipe bundle and the vacuum degree calculated according to the HEI standard may have a difference of more than 1KPa, and the output and the economical efficiency of a unit are directly and obviously influenced. And the reasonable condenser tube bundle arrangement is adopted, so that the energy-saving benefit of the unit is obvious.
The existing lateral steam inlet condenser has fewer pipe distribution modes, more or less problems of overlarge shell side flow resistance, large supercooling degree and the like, and the actual heat transfer coefficient is not ideal. Most of the existing lower exhaust steam condenser pipe arrangement modes are not compact enough, and the investment of the lateral steam inlet condenser is obviously increased if the lower exhaust steam condenser pipe arrangement modes are directly inverted for the lateral steam inlet condenser.
When the unit operates, the operating pressure of the condenser is lower than the atmospheric pressure, the condenser is a negative pressure container, the shell part of the condenser must reach enough strength to ensure that the condenser is not deformed by pressure during operation, and a waveform expansion joint with rigidity far lower than that of the shell part of the condenser is additionally arranged between the steam turbine and the condenser and can be subjected to vacuum thrust caused by the pressure difference between the atmospheric pressure and the condenser, wherein the magnitude of the vacuum thrust is the product of the difference delta P between the atmospheric pressure and the operating pressure of the condenser and the area S of an exhaust port of the steam turbine. Taking a conventional 20-ten-thousand-watt gas-steam combined cycle steam turbine as an example, the value of the combined cycle steam turbine can reach 2000KN, and if the thrust acts on the steam turbine, the combined cycle steam turbine brings great risk to the safe and stable operation of the steam turbine. 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 add a pressure balance type waveform expansion joint compensator between a steam exhaust port of the steam turbine and the condenser to absorb the thermal expansion of the condenser in all directions, so that the unit operates more safely and reliably.
Disclosure of Invention
The invention provides a condenser for an axial exhaust steam turbine, which aims at the problems that the existing lateral intake condenser has few pipe arrangement modes, the effect of directly inverting a pipe bundle of a lower exhaust steam condenser for the lateral intake condenser is not ideal, the arrangement is unreasonable and not compact, the investment is increased, and negative pressure blind plate force exists after the thermal displacement of the condenser is absorbed by an expansion joint.
The embodiment of the invention is realized by the following technical scheme: a condenser for an axial exhaust steam turbine comprises a condenser shell and a throat part laterally arranged on the condenser shell, wherein the exhaust axial direction of the steam turbine is set to be the 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 hot well is arranged at the bottom of the condenser shell, an expansion joint assembly used for balancing vacuum force and absorbing axial thermal displacement is arranged on the condenser shell, and the expansion joint assembly comprises a front sealing expansion joint assembly and a rear sealing expansion joint assembly; 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 pressure rods, the length direction of the pressure rods is arranged along the x direction, one end of each pressure rod 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 each pressure rod 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, a front end tube bundle area, a rear end tube bundle area and an air cooling tube bundle area are formed by a plurality of heat exchange tube distribution tubes, the front end tube bundle area, the rear end tube bundle area and the air cooling tube bundle area are sequentially arranged in an inner cavity of a condenser shell along the x direction, and the air cooling tube bundle area is provided with an air pumping port.
Furthermore, the front-end tube bundle region comprises a pair of v-shaped tube bundle regions, the v-shaped tube bundle regions are arranged in an up-down symmetrical mode about the center line of the tube bundle, a front middle steam passage is arranged in the v-shaped tube bundle region along the x direction, the tip ends of the v-shaped tube bundle regions face the throat, the adjacent side edges of the v-shaped tube bundle regions are connected, and one ends, far away from the throat, of the v-shaped tube bundle regions are connected with the rear-end tube bundle region;
further, the rear end tube bundle region comprises a pair of side wing tube bundle regions, the side wing tube bundle regions are arranged in an up-down symmetrical mode about the center line of the tube bundle, the side wing tube bundle regions are respectively connected with the adjacent v-shaped tube bundle regions, a rear middle steam passage is formed between the side wing tube bundle regions, the front middle steam passage is communicated with the rear middle steam passage, and the air cooling tube bundle region is embedded at the tail ends of the side wing tube bundle regions.
Furthermore, the front sealing expansion joint assembly comprises a guide pipe, a front expansion joint and a throat sealing plate which are sequentially and fixedly connected along the x direction, the guide pipe is matched with an exhaust port of a steam turbine, a flange used for being fixed with the exhaust port of the steam turbine is arranged on the outer wall of the guide pipe, the throat sealing plate is arranged in the condenser shell in a sealing mode, a through hole is formed in the throat sealing plate, the through hole is communicated with the inside of the condenser shell, and the pressure rod is fixedly connected with the guide pipe;
furthermore, the rear sealing expansion joint component comprises a rear sealing plate and a rear expansion joint which are fixedly connected in sequence along the x direction, the rear sealing plate is arranged at the rear end of the condenser shell in a sealing mode, and the pressing rod is fixedly connected with the rear sealing plate.
Furthermore, 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 at least has the following advantages and beneficial effects:
according to the invention, the expansion joint component is configured, the pressure rod is arranged to connect the front sealing expansion joint component and the rear sealing expansion joint component, 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 component from the air inlet of the throat part of the condenser, the front sealing expansion joint component is stressed and the vacuum thrust is balanced by the rear sealing expansion joint component through the pressure rod, so that the situation that the steam turbine is subjected to excessive vacuum thrust is avoided, and the safe and stable operation of the steam turbine is ensured; and through the mode that passes the depression bar from condenser inside, ingenious saving arrangement space, saved manufacturing material and investment cost. The invention adopts the tube bundle group tube distribution mode, which 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 has no vortex, the shell side steam resistance is small, the heat load distribution is uniform, the heat transfer coefficient and the operation vacuum degree of the condenser are higher, the heat exchange coefficient can be improved by more than 20 percent compared with the common tube distribution scheme and is 10 to 20 percent higher than the value calculated according to HEI, the shell side steam resistance is 40 to 60 percent 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 needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is another schematic structural view of the present invention;
FIG. 4 is a schematic view of the structure of a bundle of tubes according to the present invention;
FIG. 5 is a schematic view of the expansion joint assembly of 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 sealing expansion joint component, 511-draft tube, 512-front expansion joint, 513-throat sealing plate, 514-flange, 52-rear sealing expansion joint component, 521-rear sealing plate, 522-rear expansion joint, 53-pressure rod, 61-full arc front water chamber, 62-full arc rear water chamber, 7-tube bundle group, 71-front end tube bundle region, 711-v type tube bundle region, 712-front middle steam passage, 72-rear end tube bundle region, 721-side wing tube bundle region, 7210-air inlet gap, 722-rear middle steam passage, 73-tube bundle region, 8-tube bundle centerline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent 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 orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 5, the present embodiment provides a condenser for an axial steam turbine, including a condenser housing 1 and a throat portion 2 laterally disposed on the condenser housing 1, the throat portion 2 is disposed with a square manhole 21 to facilitate maintenance work, the turbine exhaust axial direction is set as x direction, the throat portion 2 is disposed along the x direction, a condenser front end tube plate 31 and a condenser rear end tube plate 32 are respectively disposed on two sides of an outer wall of the condenser housing 1, the condenser front end tube plate 31 is disposed with a full arc front water chamber 61, the condenser rear end tube plate 32 is disposed with a full arc rear water chamber 62, the full arc front water chamber 61 and the full arc rear water chamber 62 both adopt a "yurt" type full arc water chamber, compared with a common water chamber, the condenser has high structural strength and pressure bearing performance, and since the full arc water chamber does not store silt in a streamline non-vortex region, the ball collection rate of a rubber ball cleaning device is high, the water resistance of circulating water is small; a middle tube plate 33 is fixed in the condenser shell 1, the middle tube plate 33 is provided with a plurality of tube bundle groups 7, and the plurality of tube bundle groups 7 have a condensation effect on the exhaust gas of the steam turbine; the bottom of the condenser shell 1 is provided with a hot well 4 for collecting condensed water at the bottom of the condenser shell 1, 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 arranged along the x direction, one end of each pressure rod 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 each pressure rod 53 far away from the front sealing expansion joint assembly 51; the front sealing expansion joint component 51 and the rear sealing expansion joint component 52 are connected through the configuration of the pressure lever 53, 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 component 51 from the air inlet of the throat part 2 of the condenser, the front sealing expansion joint component 51 is stressed, and the vacuum thrust is balanced by the rear sealing expansion joint component 52 through the pressure lever 53, so that the situation that the steam turbine is subjected to overlarge vacuum thrust is avoided, and the safe and stable operation of the steam turbine is ensured; and through the mode that passes depression bar 53 from condenser inside, ingenious saving arrangement space, saved the manufacturing material.
Further, the tube bundle group 7 includes a plurality of heat exchange tubes, a front end tube bundle zone 71, a rear end tube bundle zone 72 and an air cooling tube bundle zone 73 are formed by a plurality of heat exchange tube distribution tubes, the front end tube bundle zone 71, the rear end tube bundle zone 72 and the air cooling tube bundle zone 73 are arranged to form a specific shape, the front end tube bundle zone 71, the rear end tube bundle zone 72 and the air cooling tube bundle zone 73 are sequentially arranged in an inner cavity of the condenser shell 1 along the x direction, the tube bundles in the air cooling tube bundle zone 733 account for 5% -7% of the total number of the whole tube bundles, and an air pumping port is configured in the air cooling tube bundle zone 73. The air pumping port is used for being connected with an air pumping system through a pipe fitting, the air pumping system is used for pumping away exhaust steam which is not fully cooled and condensed and non-condensed gas, and subsequent steam is convenient to introduce, so that the condenser maintains a certain vacuum degree, and the problem that the exhaust steam is not smooth and the unit efficiency is reduced due to overlarge pressure in an inner cavity of the condenser is avoided. 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 x direction along the exhaust axial direction of the steam turbine, so that exhaust gas is condensed sequentially through the front-end tube bundle area 71 and the rear-end tube bundle area 72 after entering the inner cavity of the condenser shell 1, a steam flow field in the condenser is straight, the baffling is less, a streamline is uniform, no vortex exists when the steam flows, the steam is fully condensed before entering the air cooling tube bundle area, and is finally pumped away through an air pumping port of the air cooling tube bundle area 73 located at the tail end, and the overall heat transfer coefficient of the condenser is high.
Further, in the present embodiment, the front end tube bundle zone 71 includes a pair of v-shaped tube bundle zones 711, the pair of v-shaped tube bundle zones 711 are symmetrically arranged up and down with respect to the tube bundle center line 8, a front middle steam passage 712 is arranged in the v-shaped tube bundle zone 711 along the x direction, the tip of the v-shaped tube bundle zone 711 faces the throat 2, the adjacent sides of the pair of v-shaped tube bundle zones 711 are connected, and one end of the v-shaped tube bundle zone 711 away from the throat 2 is connected to the rear end tube bundle zone 72; by configuring the front end tube bundle area 71 into the pair of v-shaped tube bundle areas 711, exhaust entering the condenser is firstly contacted with the tips of the v-shaped tube bundle areas 711, so that resistance generated by the front end tube bundle areas 71 and steam is reduced, the heat exchange area is increased, the overall heat exchange efficiency of the condenser is improved, and steam in the condenser shell 1 is uniform in streamline. The front middle steam passage 712 is arranged along the exhaust direction, and the characteristics of straight steam flow lines and less deflection are also ensured in the front end tube bundle area 71, so that the steam flows without vortex, and the structure is simple, but a higher heat transfer coefficient is ensured;
the rear end tube bundle region 72 comprises a pair of side wing tube bundle regions 721, the pair of side wing tube bundle regions 721 are arranged up and down symmetrically about the tube bundle central line 8, the pair of side wing tube bundle regions 721 are respectively connected with the adjacent v-shaped tube bundle regions 711, a rear middle steam passage 722 is formed between the pair of side wing tube bundle regions 721, a front middle steam passage 712 is communicated with the rear middle steam passage 722, the air cooling tube bundle region 73 is embedded at the tail end of the pair of side wing tube bundle regions 721 along the x-axis direction, the air cooling tube bundle region 73 is positioned at the tail end of the side wing tube bundle region 721, the pair of side wing tube bundle regions 721 are in a clamping shape and positioned at two sides of the air cooling tube bundle region 73, the side wing tube bundle region 721 is provided with a plurality of air inlet notches 7210, the air inlet area of the side wing tube bundle region 721 is increased by the arrangement of the air inlet notches 7210, the steam positioned at the upper and lower sides of the front end tube bundle region 71 can enter the tube bundle region from the side wing tube bundle region 721 to ensure that the steam can enter the tube bundle of the side wing tube bundle region 721 smoothly, the heat exchange efficiency is improved. Through configuring rear end tube bank district 72 into a pair of flank tube bank district 721, its simple structure is compact, has guaranteed higher heat transfer coefficient when being convenient for the stringing, and preceding middle steam passage 712, back middle steam passage 722 and air cooling tube bank district 73 set up along the x axial, and are located the inside of tube bank 7, and then steam is straight, the baffling is few at the inside flow streamline of tube bank 7, and the inside no vortex of tube bank 7, and then has guaranteed high efficiency and high heat transfer coefficient.
The front sealing expansion joint component 51 comprises a guide pipe 511, a front expansion joint 512 and a throat closing plate 513 which are fixedly connected in sequence along the x direction, the guide pipe 511 is matched with an exhaust port of a steam turbine, a flange 514 for fixing the exhaust port of the steam turbine is arranged on the outer wall of the guide pipe 511, the flange 514 is matched with the exhaust port of the steam turbine, and the front sealing expansion joint component is convenient to connect and mount and has better structural strength; the throat sealing plate 513 is hermetically arranged at an air inlet of the condenser, the throat sealing plate 513 is provided with a through hole, the through hole is communicated with the inside of the condenser shell 1, and the pressure 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 fixedly connected in sequence along the x direction, the rear sealing plate 521 is hermetically arranged at the rear end of the condenser shell 1, and the pressure rod 53 is fixedly connected with the rear sealing plate 521. Through setting up honeycomb duct 511, throat shrouding 513 and back shrouding 521, increased structural strength, improved life.
Specifically, the tube bundle groups 7 are four in number, 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, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a condenser for axial exhaust steam turbine, includes condenser casing (1) and lateral direction and disposes throat (2) in condenser casing (1), establishes turbine exhaust axial and be the x to, and this throat (2) are along the x to setting up, condenser casing (1) outer wall both sides dispose 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 disposes hotwell (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, far away from the condenser shell (1), of the throat part (2), the front sealing expansion joint assembly (51) is connected with a plurality of pressure rods (53), the length directions of the pressure rods (53) are arranged along the x direction, one end, far away from the front sealing expansion joint assembly (51), of each pressure rod (53) 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, far away from the front sealing expansion joint assembly (51), of each pressure rod (53);
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).
2. The condenser for an axial exhaust steam turbine according to claim 1, characterized in that the tube bundle group (7) comprises a plurality of heat exchange tubes, the plurality of heat exchange tubes are arranged to form a front tube bundle region (71), a rear tube bundle region (72) and an air cooling tube bundle region (73), the front tube bundle region (71), the rear tube bundle region (72) and the air cooling tube bundle region (73) are sequentially arranged in an inner cavity of the condenser shell (1) along an x direction, and the air cooling tube bundle region (73) is provided with an air extraction port.
3. The condenser for an axial exhaust steam turbine according to claim 2, characterized in that the front end tube bundle region (71) comprises a pair of v-shaped tube bundle regions (711), the pair of v-shaped tube bundle regions (711) are arranged in an up-down symmetrical mode about a tube bundle central line (8), a front middle steam passage (712) is arranged in the v-shaped tube bundle region (711) along the x direction, the tip end of the v-shaped tube bundle region (711) faces the throat (2), the adjacent side edges of the pair of v-shaped tube bundle regions (711) are connected, and one end, away from the throat (2), of the v-shaped tube bundle region (711) is connected with the rear end tube bundle region (72);
the rear end tube bundle region (72) comprises a pair of side wing tube bundle regions (721), the side wing tube bundle regions (721) are arranged up and down symmetrically about a tube bundle central line (8), the side wing tube bundle regions (721) are respectively connected with the adjacent v-shaped tube bundle regions (711), a rear middle steam passage (722) is formed between the side wing tube bundle regions (721), the front middle steam passage (712) is communicated with the rear middle steam passage (722), and the air cooling tube bundle region (73) is embedded at the tail ends of the side wing tube bundle regions (721).
4. The condenser for the axial exhaust steam turbine as claimed in claim 1, wherein the front sealing expansion joint assembly (51) comprises a draft tube (511), a front expansion joint (512) and a throat closing plate (531) which are fixedly connected in sequence along the x direction, the draft tube (511) is matched with an exhaust port of the steam turbine, a flange (514) for fixing the exhaust port of the steam turbine is arranged on the outer wall of the draft tube (511), the throat closing plate (531) is hermetically arranged on the condenser shell (1), the throat closing plate (531) is provided with a through hole which is communicated with the inside of the condenser shell (1), and the pressure rod (53) is fixedly connected with the draft tube (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).
5. A condenser for an axial exhaust steam turbine according to claim 3, characterized in that the tube bundle groups (7) are four in number, four tube bundle groups (7) being arranged in sequence from top to bottom.
6. A condenser for an axial exhaust steam turbine according to claim 1, characterized in that 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 |
|---|---|---|---|
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| 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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2021
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| 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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| CN114152103B (en) | 2024-05-14 |
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