JP2003014381A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser wherein the flow of waste from a turbine is made good, and flow performance is further improved, and further the condensation rate of turbine waste to be condensed is improved. SOLUTION: A condenser includes rectification plates 22a, 22b outside upper stage side water supply heaters 18, 19 laid on a connection trunk section 14 and lower stage side water supply heaters 20, 21 laid in the same.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser having an improved connecting body connected to a steam turbine.

[0002]

2. Description of the Related Art In general, a steam turbine plant is shown in FIG.
As shown in 3 (a) and 3 (b), the condenser 2 is connected to the low pressure turbine 1, and the turbine exhaust exhausted from the low pressure turbine 1 that has finished the expansion work is condensed in the condenser 2 to The heat energy of the plant is recovered to improve the thermal efficiency of the plant.

The low-pressure turbine 1 includes a turbine casing 3 for accommodating turbine nozzles, turbine rotor blades (both not shown), a turbine exhaust chamber 4 provided on the outlet side of the turbine casing 3, and a turbine exhaust chamber 4. And a bearing cone 5 surrounding a bearing (not shown) that supports the shaft system.

The condenser 2 has a connecting body portion (condenser upper body portion) 6 and a main body portion 7.

In order to effectively use the space, the connection body portion 6 is provided with feed water heaters 8a, 8b, ... In a direction intersecting the axial direction of the turbine casing 3. Further, the connection body 6 is provided therein with trusses 9a and 9b which also serve to reinforce the strength of the steel plate for the body.

On the other hand, in the main body portion 7, a large number of heat transfer tubes 1 are arranged along a direction intersecting the axial direction of the turbine casing 3.
0 is formed as, for example, tube bundle portions 11a and 11b arranged in an egg shape. The tube bundle portions 11a and 11b flow cooling water such as seawater inside the tubes and turbine exhaust outside the tubes to exchange heat between the turbine exhaust and the cooling water and condense the turbine exhaust to generate condensate.

In the condenser having such a structure,
The turbine exhaust that has completed expansion work in the low-pressure turbine 1 becomes a turning flow that bends in the turbine exhaust chamber 4 at a substantially right angle. The turbine exhaust gas that has turned into a diverted flow becomes a flow that spreads in the connection body 6 and is decelerated accordingly, and the velocity becomes almost uniform and flows into the tube bundle portions 11a and 11b of the main body portion 7, where the pipe bundle is formed. Heat is exchanged with the cooling water in the parts 11a and 11b to become condensate.

[0008]

In recent steam turbine plants, there is a tendency to increase the efficiency of turbine performance by enlarging the size of the steam turbine, especially the steam turbine for nuclear power.

With the increase in size of steam turbines and the increase in efficiency of turbine performance, the condenser 2 is required to have densely arranged trusses for ensuring the strength of the connecting body portion 6 and pipes for the water heater. The sex is coming out.

However, if the trusses and pipes are densely packed,
It has a significant adverse effect on the turbine exhaust flow and the condenser's condensing performance, which have not been a problem until now. In particular, the turbine exhaust is constrained by the structure of the turbine exhaust chamber 4, and has high pressure swirl flow, pressure loss (shear flow pressure loss due to velocity defect) caused by uneven flow due to turning flow, and obstacles such as truss and piping. The fluid resistance associated with the object, the static pressure recovery rate reduction due to the unsuitability of the expansion body flow path of the connection body portion 6, the condensation rate reduction during the partial load operation, and the like are significantly increased.

The present invention has been made in consideration of such circumstances, and condenses the turbine exhaust to condensate it by improving the flow of the turbine exhaust to further improve the hydrodynamic performance such as pressure loss reduction. The purpose is to provide a condenser that increases the rate.

[0012]

The condenser according to the present invention comprises:
In order to achieve the above-mentioned object, as described in claim 1, one side is connected to a steam turbine, and an upper stage side is arranged in a line along a flow of turbine exhaust from the steam turbine in an intermediate portion. A condenser provided with a connection body part on which a feed water heater and a lower feed water heater are mounted, wherein the condenser is provided outside the upper feed water heater and the lower feed water heater arranged in rows, and the turbine is provided. A straightening plate is provided along the flow of exhaust gas.

In order to achieve the above-mentioned object, the condenser according to the present invention comprises, as described in claim 2, an upper stage side feed water heater and a lower stage side feed water heater which are arranged in rows. The current plate provided outside and provided along the flow of the turbine exhaust is configured to extend toward the downstream side of the lower stage feed water heater.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, in order to achieve the above-mentioned object. In a condenser provided with a connecting body part on which an upper stage side feed water heater and a lower stage side feed water heater are arranged along a flow of turbine exhaust, the upper stage side feed water heater is arranged along the line. Outside the lower feed water heater and on the fuselage wall side, a straightening plate is provided along the flow of the turbine exhaust, and the upper feed water heater and the lower feed water heater are arranged in rows. And a connection body centerline side straightening plate provided along the flow of the turbine exhaust, on the outside of the connection bodyside portion, and on the other hand, the straightening plate and the connection body portion centerline side straightening plate. A structure in which and are supported by a reinforcing member It is intended to.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, in order to achieve the above object. In a condenser provided with a connecting body part on which an upper stage side feed water heater and a lower stage side feed water heater are arranged along a flow of turbine exhaust, the upper stage side feed water heater is arranged along the line. The lower side feed water heater is covered with an outer cover.

Further, in the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 5, the jacket is formed in a streamlined shape.

In order to achieve the above-mentioned object, in the condenser according to the present invention, as described in claim 6, the jacket is provided with a turbine exhaust suction port on the fuselage wall side of the connection fuselage portion. At the same time, a turbine exhaust outlet is provided on the outlet side of the connecting body portion.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, as described in claim 7. In a condenser provided with a connecting body part on which an upper stage side feed water heater and a lower stage side feed water heater are arranged along a flow of turbine exhaust, the upper stage side feed water heater is arranged along the line. A lower-stage feed water heater is arranged on the body wall side of the connection body portion to form a wide central passage for turbine exhaust, and the upper-stage feed water heater and the lower-stage feed water heater arranged in rows are covered with a jacket. It is intended to be covered with.

Further, in the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 8, the jacket is formed in a streamlined shape.

Further, in the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 9, the jacket has a turbine exhaust suction port on the central passage side of the connecting body portion. At the same time, a turbine exhaust outlet is provided on the outlet side of the connecting body portion.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, in order to achieve the above-mentioned object. In a condenser provided with a connecting body portion on which an upper stage side feed water heater and a lower stage side feed water heater are arranged in a row along the flow of turbine exhaust, in the upper stage side feed water heater arranged in a row The guide plate is formed in a dome shape toward the steam turbine side.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, in order to achieve the above-mentioned object. In a condenser provided with a connecting body part on which an upper stage side feed water heater and a lower stage side feed water heater are arranged along a flow of turbine exhaust, the upper stage side feed water heater is arranged along the line. A cusp is provided on each of the lower feed water heater.

Further, in the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 12, the cusp provided in the upper feed water heater has a funnel shape toward the steam turbine side. To form.

In order to achieve the above-mentioned object, the condenser according to the present invention has the cusp provided in the lower feed water heater facing the outlet side of the connecting body portion. To form a funnel shape.

Further, in the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 14, the cusp provided in the upper stage side feed water heater is bulged toward the steam turbine side. It is formed into a tapered ellipse.

In the condenser according to the present invention, in order to achieve the above-mentioned object, as described in claim 15, the cusp provided in the lower stage side feed water heater faces the outlet side of the connection body portion. It is formed into a tapered ellipse that rises up.

In order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine in order to achieve the above object. In a condenser provided with a connecting body portion on which an upper stage side feed water heater and a lower stage side feed water heater are arranged in a row along a flow of turbine exhaust, in the connecting body portion, a throttle passage is provided in an intermediate portion thereof. And an expansion passage is formed on the outlet side thereof, and the upper stage side feed water heater and the lower stage side feed water heater are sequentially arranged outside the connection body portion along the body wall.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has one side connected to a steam turbine and an intermediate portion from the steam turbine, in order to achieve the above object. In a condenser provided with a connection body portion on which a plurality of feed water heaters are sequentially arranged along a flow of turbine exhaust, a plurality of water feed heaters mounted on the connection body portion are from the steam turbine side. It is arranged in a meandering shape toward the outlet of the connecting body portion.

In order to achieve the above-mentioned object, the condenser according to the present invention has a plurality of meandering water heaters arranged in a meandering manner, as described in claim 18, in which the intersections of the sides of the triangle are intersected. Is the center position of the installation.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has a plurality of feed water heaters having an installation center position at the intersection of each side of the triangle as described in claim 19. The stagger distance between one center axis connecting the installation center positions and the other center axis connecting the installation center positions is set to be smaller than the average diameter of the plurality of feed water heaters.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a condenser according to the present invention will be described below with reference to the drawings and the reference numerals attached to the drawings.

FIG. 1 is a conceptual diagram showing a first embodiment of a condenser according to the present invention.

The condenser 12 according to this embodiment has a connecting body portion 14 connected to the low pressure turbine 13. The condenser 12 according to the present embodiment includes a main body part in addition to the connection body part 14, but the description thereof is omitted here.

The low-pressure turbine 13 includes a turbine exhaust chamber 16 provided on the outlet side of a turbine casing 15 that houses a turbine nozzle, turbine rotor blades (both not shown), and the like.
A bearing cone 17 is housed in the turbine exhaust chamber 16 and surrounds a bearing (not shown) that supports the shaft system.

Further, the condenser 12 extends toward the intermediate portion in the body of the connecting body portion 14 and is arranged along the flow of the turbine exhaust, and the upper stage first feed water heater 18 and the upper stage second feed water are provided. The heater 19 is provided with a lower stage first feed water heater 20 and a lower stage second feed water heater 21.

On the other hand, the connecting body portion 14 has an upper stage first feed water heater 18, an upper stage second feed water heater 19, a lower stage first feed water heater 20 and a lower stage side feed water which extend toward an intermediate portion in the body. The upper stage first feed water heater 18 and the lower stage first feed water heater 20 and the upper stage second feed water heater 19 and the lower stage first feed water heater 21 are arranged along the flow of the turbine exhaust with respect to the heater 21. Rectifier plates 22a, 22 are provided on the outer diameter side of each.
b is provided.

In the condenser having such a structure,
The turbine exhaust that has exited the turbine exhaust chamber 16 and has completed the expansion work causes a drift when it is turned toward the upstream side of the connecting body portion 14.

However, the connecting body portion 14 includes the upper stage first feed water heater 18 and the lower stage first feed water heater 20, the upper stage second feed water heater 19 and the lower stage second feed water heater 21.
Rectifying plates 22a and 22b are provided on the outer diameter side of
Since the passages 23a and 23b are formed in a so-called substantially rectangular duct shape, the upper stage first feed water heater 1 of the turbine exhaust is
It is possible to prevent the disturbance caused by the vortex flow and the separation flow generated from the trailing edge portions 24a and 24b of the second upper side feed water heater 19 and the second upper side feed water heater 19. Further, it is possible to prevent the turbine exhaust from being entrained in the trailing edges 24a and 24b of the upper-stage first feed water heater 18 and the upper-stage second feed water heater 19, respectively, without making the turbine exhaust a complicated three-dimensional flow. Simple 2
It can be a dimensional flow.

Therefore, according to the present embodiment, the fluctuating fluid force due to the turbine exhaust flow between the first and second feedwater heaters 18, 19, 20, 21 on the upper and lower stages can be reduced, so that the fluid friction causes The pressure loss can be further reduced.

FIG. 2 is a conceptual diagram showing a second embodiment of the condenser according to the present invention. The same components as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper-stage first feed water heater 18, an upper-stage second feed water heater 19, and a lower-stage first first water supply heater 18 which extend toward an intermediate portion in the body of the connecting body portion 14. The upper-stage first feed water heater 18 is arranged along the flow of the turbine exhaust with respect to the feed water heater 20 and the lower second feed water heater 21.
Further, the straightening plates 22a and 22b are provided on the outer diameter sides of the lower first feed water heater 20, the upper second feed water heater 19 and the lower second feed water heater 21, respectively, and the straightening plates 22a and 22b are provided. Is straightly extended from the contact points A and B of the lower-stage first feed water heater 20 and the lower-stage second feed water heater 21 toward the downstream side of the trailing edge portions 24c and 24d.

As described above, in this embodiment, the upper stage first feed water heater 18 and the lower stage first feed water heater 20, the upper stage second feed water heater 19 and the lower stage second feed water heater 21.
Rectifying plates 22a and 22b are provided on the outer diameter side of
Since each straightening vane 22a, 22b is extended straight toward the downstream side of each trailing edge portion 24c, 24d, due to the vortex flow and the separation flow generated from each trailing edge portion 24c, 24d as in the first embodiment. Disturbance can be prevented. Further, the upper stage side first feed water heater 18 and the upper stage side second feed water heater 19
It is possible to prevent the turbine exhaust from being entrained in each of the trailing edges 24a and 24b, and to make the turbine exhaust into a simple two-dimensional flow.

Therefore, in this embodiment, as in the first embodiment, the upper and lower first and second feed water heaters 18, 1 are arranged.
The fluctuating fluid force due to the turbine exhaust flow between 9, 20, and 21 can be reduced, and the pressure loss due to fluid friction can be further reduced.

FIG. 3 is a diagram comparing pressure loss coefficients comparing conventional data with data obtained by the present invention. Note that in FIG. 3, the horizontal axis represents the dimensionless Reynolds number Re that indicates the hydrodynamic similarity law of the flow, and the vertical axis represents the pressure loss coefficient ζ.

The Reynolds number and the pressure loss coefficient here are respectively

[Outer 1] Is expressed as. Further, FIG. 3 shows data verified by a wind tunnel experiment.

In this embodiment, the upper stage first feed water heater 18
Further, the straightening plates 22a and 22b are provided on the outer diameter sides of the lower second feed water heater 20, the upper second feed water heater 19 and the lower second feed water heater 21, respectively.
When a and 22b were straightly extended toward the downstream side of the respective trailing edge portions 24c and 24d, it was found that the pressure loss was reduced by 30% or more as compared with the conventional case, as shown in FIG.

FIG. 4 is a conceptual diagram showing a third embodiment of the condenser according to the present invention. The same components as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper stage side first feed water heater 18, an upper stage side second feed water heater 19, and a lower stage side first that extend toward the middle portion of the connection body portion 14 inside the body. The upper-stage first feed water heater 18, the lower-stage first feed water heater 20, and the upper-stage second feed water heater 19 with respect to the feed water heater 20 and the lower-stage second feed water heater 21 along the flow of the turbine exhaust. And rectifying plates 22a and 22b are provided on the respective outer diameter sides of the lower tier side second feed water heater 21 and the rectifying plates 22a and 22b of the lower tier first feed water heater 20 and the lower tier second feed water heater 21. While extending straight from the respective contact points A and B toward the downstream side of the respective rear edge portions 24c and 24d, the first upper stage side along the center line CL side of the connecting body portion 14
Feed water heater 18 and lower first feed water heater 20, upper second feed water heater 19 and lower second feed water heater 2
1 and the connection body part center line side current plate 25a, 2 respectively
5b is provided, and the straightening plates 22a, 22b and the connecting body part centerline straightening plates 25a, 25b are supported by the reinforcing members 26a, 26b.

Thus, in this embodiment, the upper stage first feed water heater 18 and the lower stage first feed water heater 20, the upper stage second feed water heater 19 and the lower stage second feed water heater 21.
And the rectifying plates 22a and 22b provided on the outer diameter side and the centerline side of the connecting body portion 14 and the rectifying plates 25a and 25b on the connecting body portion centerline side, respectively.
Since 6a and 26b are provided, the strength can be maintained high, and it is possible to sufficiently resist the disturbance of the turbine exhaust.

FIG. 5 is a conceptual diagram showing a fourth embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper stage side first feed water heater 18, an upper stage side second feed water heater 19, and a lower stage side first that extend toward the middle portion of the connection body portion 14 inside the body. The entire area of the feed water heater 20 and the lower second side feed water heater 21 is covered with a streamlined jacket 29 having, for example, an oval shape, while the upper stage first feed water heater 18 and the lower stage first feed water heater are heated. Fuselage wall side between the vessel 20 and the upper side second feed water heater 19
Between the lower stage side first feed water heater 21 and the lower stage side second feed water heater 21 and the turbine exhaust suction ports 27a and 27b are provided on the body wall side between the lower stage side first feed water heater 21 and the lower stage side second feed water heater 21, respectively. The turbine exhaust outlet 28 is provided on the center line CL side of the connecting body portion 14 and on the outlet side of the connecting body portion 14.

As described above, in the present embodiment, the upper stage first feed water heater 18, the upper stage second feed water heater 19, and the lower stage first feed water heater 18 are provided.
Since the entire area of the feed water heater 20 and the lower second side feed water heater 21 is covered with the oval jacket 29, it is possible to prevent the disturbance or the like due to the vortex flow or the separation flow, as in the first embodiment. it can.

Further, in this embodiment, the outer casing 29 is provided with the turbine exhaust suction ports 27a and 27b and the turbine exhaust discharge port 2.
8 is provided to rectify the flow when the turbine exhaust is supplied and discharged, the boundary layer thickness of the turbine exhaust flowing through the upper and lower stage first and second feed water heaters 18, 19, 20, 21 is By making it smaller, the average flow velocity can be kept low.

Therefore, in this embodiment, as in the first embodiment, the upper and lower first and second feed water heaters 18, 1 are arranged.
The fluctuating fluid pressure due to the turbine exhaust flow between 9, 20, and 21 can be reduced, and the pressure loss due to fluid friction can be further reduced.

FIG. 6 is a conceptual diagram showing a fifth embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper-stage first feed water heater 18, an upper-stage second feed water heater 19, and a lower-stage first first water heater 18, which extend toward an intermediate portion of the connecting body portion 14 inside the body. Of the feed water heater 20 and the lower second feed water heater 21,
The upper stage side first feed water heater 18 and the lower stage side first feed water heater 20, and the upper stage second feed water heater 19 and the lower stage second feed water heater 21 are arranged as one set on the body wall side, A wide central passage 30 for the turbine exhaust is secured, and the upper stage first feed water heater 18 and the lower stage first feed water heater 20 which are arranged as one set on the body wall side and the upper stage second
Each of the feed water heater 19 and the lower second side feed water heater 21 is provided with a streamlined jacket 29a, 2 such as a semi-elliptical shape.
It is covered with 9b.

Further, the condenser 12 according to the present embodiment includes, among the streamlined jackets 29a, 29b of, for example, a semi-elliptical shape,
Turbine exhaust suction ports 27a, 27b on the side of the central passage 30
And the turbine exhaust outlets 28a and 28b are provided on the outlet side of the connecting body portion 14, respectively.

As described above, in this embodiment, the upper stage first feed water heater 18 and the lower stage first feed water heater 20, the upper stage second feed water heater 19 and the lower stage second feed water heater 21.
And each of them are arranged as a set on the fuselage wall side and are covered with semi-elliptical jackets 29a and 29b to secure a wider central passage 30, so that the turbine exhaust can be satisfactorily flown, and the pressure can be reduced. Loss can be reduced.

FIG. 7 is a conceptual diagram showing a sixth embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper stage side first feed water heater 18, an upper stage side second feed water heater 19, and a lower stage side first that extend toward an intermediate portion in the body of the connection body portion 14. Of the feed water heater 20 and the lower second feed water heater 21,
Upper stage first feed water heater 18 and upper stage second feed water heater 19
A guide plate 31 formed in a dome shape is provided toward the low-pressure turbine 13 side as a set.

As described above, in this embodiment, the upper stage first feed water heater 18 and the upper stage second feed water heater 19 are set as one set, and the dome-shaped guide plate 31 is provided toward the low pressure turbine 13 side. Therefore, the turbine exhaust can be formed into a smooth flow.

Therefore, according to this embodiment, the pressure loss due to the flow of turbine exhaust can be suppressed to a low level,
Due to the impact of the turbine exhaust, the upper side first feed water heater 1
8 and the upper second side feed water heater 19 can be protected.

FIG. 8 is a conceptual view showing a seventh embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to the present embodiment has an upper stage side first feed water heater 18, an upper stage side second feed water heater 19, and a lower stage side first that extend toward the middle part of the body of the connection body portion 14. Of the feed water heater 20 and the lower second feed water heater 21,
The upper-stage first feed water heater 18 and the upper-stage second feed water heater 19 are provided with cusps 33a and 33b formed in a funnel shape toward the low-pressure turbine 13 side, respectively, and the lower-stage first feed water heater 20 and the lower stage are provided. Side second feed water heater 21
Each of them is provided with cusps 33c and 33d formed in a funnel shape toward the outlet side of the connecting body portion 14.

As described above, in this embodiment, each of the upper stage side first feed water heater 18 and the upper stage side second feed water heater 19 is provided with cusps 33a, 33b formed in a funnel shape toward the low pressure turbine 13 side. Along with each of the lower-stage first feed water heater 20 and the lower-stage second feed water heater 21, cusps 33c and 33d formed in a funnel shape toward the outlet side of the connection body portion 14 are provided. 19, 2
Since the vortex flow and the flow separation generated from each of the leading edge portions 32a, 32b, 32c, 32d of 0 and 21 and the trailing edge portions 24a, 24b, 24c, 24d are suppressed, the flow of the turbine exhaust is stabilized, Pressure loss can be reduced.

In this embodiment, the cusp 33 is formed in each of the upper first feed water heater 18 and the upper second feed water heater 19 in a funnel shape toward the low pressure turbine 13 side.
a and 33b are provided, and the lower side first feed water heater 2
No. 0 and the lower second side feed water heater 21 each have a cusp 33 formed in a funnel shape toward the outlet side of the connecting body portion 14.
c and 33d are provided, but not limited to this example, for example,
As shown in FIG. 9, the front edge portions 32 a, 3 of the upper first feed water heater 18 and the upper second feed water heater 19, respectively.
2b is provided with cusps 33a and 33b having a tapered elliptical shape, for example, a crescent shape, which is bulged toward the low-pressure turbine 13 side, and each of the lower stage first feed water heater 20 and the lower stage second feed water heater 21 is provided. Trailing edges 24c, 24d
Further, cusps 33c and 33d having a tapered elliptical shape such as a crescent shape may be provided which is bulged toward the outlet side of the connection body portion 14.

FIG. 10 is a conceptual view showing a ninth embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to this embodiment has a so-called turbine exhaust end widening passage 36 in which the throttle passage 34 is formed in the intermediate portion of the connecting body portion 14 and the expansion passage 35 is formed at the outlet side thereof. Forming and connecting body part 1
4, the upper side first feed water heater 1 along the fuselage wall
8, the second upper side feed water heater 19, the lower first side feed water heater 20, and the lower second side feed water heater 21 are installed respectively.

As described above, in this embodiment, the connecting body portion 1 is
4, a throttle passage 34 is formed in an intermediate portion of the turbine 4, and a turbine exhaust end spread passage 36 having an expansion passage 35 on the outlet side thereof is formed, and each feed water heater 1 is provided along the outer body wall thereof.
Since 8, 19, 20, 21 are installed and no obstacle is installed in the turbine exhaust end spread passage 36, the turbine exhaust flow can be improved and pressure loss can be reduced, and the connecting body portion 14 With the formation of the expansion passage 35, the pressure of the turbine exhaust, which is a turning flow from the low-pressure turbine 13, can be recovered, and the condensation rate of the condensate generated during heat exchange can be further increased.

FIG. 11 shows data collected by a wind tunnel experiment when the throttle passage 34 is formed in the intermediate portion of the connecting body portion 14 and the turbine exhaust end spread passage 36 having the spread passage 35 on the outlet side thereof is formed. Reynolds Re on the horizontal axis,
It is a pressure loss diagram of the connection body part 14 which shows each pressure loss coefficient (zeta) on a vertical axis.

In this embodiment, when the connecting body portion 14 is formed into the turbine exhaust end widening passage 36 having the throttle passage 34 in the middle portion and the widening passage 35 on the outlet side, as shown in FIG. It was confirmed that the pressure loss was made 0.1 or less.

FIG. 12 is a conceptual view showing a tenth embodiment of the condenser according to the present invention. The same parts as those of the first embodiment are designated by the same reference numerals.

The condenser 12 according to this embodiment has a first feed water heater 37, a second feed water heater 38, a third feed water heater 39, and a third feed water heater 39, which extend toward an intermediate portion of the connection body portion 14 inside the body. Four
The feed water heater 40 is sequentially arranged along the flow of turbine exhaust from the low-pressure turbine 13 side toward the outlet side of the connection body portion 14,
It is arranged in a meandering shape.

This meandering arrangement is such that the sides a, b,
The intersections A, B, C, D of c, d, e are set as installation centers, and the first central axis A1 and the second central axis A1 connecting the installation center positions passing through the first water heater 37 and the third water heater 39 The stagger distance W from the second central axis A2 connecting the installation center positions passing through the feed water heater 38 and the fourth feed water heater 40 is set to each feed water heater 3
It is set smaller than the average diameter of 7, 38, 39 and 40.

As described above, in this embodiment, the first feed water heater 37, the second feed water heater 38, the third feed water heater 39, and the fourth feed water heater 40 are connected from the low-pressure turbine 13 side to the connecting body portion 14. Since the resistance elements of the turbine exhaust to the feed water heaters 37 to 40 are reduced in a meandering manner toward the outlet of the turbine exhaust, the pressure loss of the turbine exhaust can be reduced by the reduction of the resistance elements.

[0076]

As described above, the condenser according to the present invention improves the flow of turbine exhaust that is given as a turning flow from the low-pressure turbine to the connecting body portion, and at the same time, eliminates the static flow lost during the turning flow. Since a means for recovering the pressure is provided, a stable flow with less pressure loss can be given to the turbine exhaust, heat exchange can be performed in the tube bundle portion, and more condensate can be generated under a high condensation rate, As a result, the plant thermal efficiency can be further improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a first embodiment of a condenser according to the present invention.

FIG. 2 is a conceptual diagram showing a second embodiment of a condenser according to the present invention.

FIG. 3 is a diagram comparing pressure loss coefficients comparing conventional data with data obtained by the present invention.

FIG. 4 is a conceptual diagram showing a third embodiment of a condenser according to the present invention.

FIG. 5 is a conceptual diagram showing a fourth embodiment of a condenser according to the present invention.

FIG. 6 is a conceptual diagram showing a fifth embodiment of a condenser according to the present invention.

FIG. 7 is a conceptual diagram showing a sixth embodiment of a condenser according to the present invention.

FIG. 8 is a conceptual diagram showing a seventh embodiment of a condenser according to the present invention.

FIG. 9 is a conceptual diagram showing an eighth embodiment of a condenser according to the present invention.

FIG. 10 is a conceptual diagram showing a ninth embodiment of a condenser according to the present invention.

FIG. 11 is a pressure loss diagram obtained by the condenser according to the present invention.

FIG. 12 is a conceptual diagram showing a tenth embodiment of a condenser according to the present invention.

FIG. 13 is a conceptual diagram showing a conventional condenser, (a) is a side view of the condenser, and (b) is a front view of the condenser.

[Explanation of symbols]

1 low pressure turbine 2 condenser 3 turbine casing 4 Turbine exhaust chamber 5 bearing cones 6 Connection body 7 Main body 8a, 8b, 8c, 8d Water heater 9a, 9b truss 10 heat transfer tubes 11a, 11b tube bundle part 12 condenser 13 Low pressure turbine 14 Connection body 15 Turbine casing 16 Turbine exhaust chamber 17 bearing cone 18 Upper feed water heater 19 Upper feed water heater 20 Lower feed water heater 21 Lower second water heater 22a, 22b Current plate 23a, 23b passage 24a, 24b, 24c, 24d Rear edge part 25a, 25b Connection body centerline side current plate 26a, 26b Reinforcing member 27a, 27b Turbine exhaust suction port 28, 28a, 28b Turbine exhaust exhaust port 29, 29a, 29b jacket 30 Central passage 31 Information board 32a, 32b, 32c, 32d Front edge part 33a, 33b, 33c, 33d Cusp 34 Throttle passage 35 Expansion passage 36 Turbine exhaust end spread passage 37 First water heater 38 Second water heater 39 Third water heater 40 Fourth water heater

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masashi Tsutsui             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Yoshitaka Fukuyama             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Yoshiki Shinseki             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Shunji Kono             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Akira Nemoto             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office F-term (reference) 3L065 DA15

Claims (19)

[Claims] 1. An upper stage side feed water heater and a lower stage side feed water heater which are arranged in a line along a flow of turbine exhaust from the steam turbine and which are connected to one side to a steam turbine. In a condenser provided with a connecting body part to be provided, it is provided outside the upper stage side feed water heater and the lower stage side feed water heater arranged in a row, and a straightening plate is provided along the flow of the turbine exhaust. Characteristic condenser. 2. A straightening plate provided outside the upper-stage feed water heater and the lower-stage feed water heater arranged in rows and provided along the flow of the turbine exhaust is provided on the downstream side of the lower-stage feed water heater. The condenser according to claim 1, wherein the condenser is configured so as to extend toward it. 3. One side is connected to a steam turbine, and an upper stage side feed water heater and a lower stage side feed water heater which are arranged in a row along the flow of turbine exhaust from the steam turbine are mounted in an intermediate portion. In a condenser provided with a connecting body part, which is provided outside the upper-stage side feed water heaters and the lower-stage side feed water heaters arranged in a row and on the side of the body wall, rectifying along the flow of the turbine exhaust. It is provided with a plate, is provided outside the upper-stage side feed water heater and the lower-stage side feed water heater arranged in a row, and is provided on the center line side of the connection body portion, and the connection body is provided along the turbine exhaust flow. A condenser comprising a part center line side current plate, and a structure in which the current plate and the connection body part center line side current plate are supported by a reinforcing member. 4. One side is connected to a steam turbine, and an upper stage side feed water heater and a lower stage side feed water heater, which are arranged in a row along the flow of turbine exhaust from the steam turbine, are mounted in an intermediate portion. In the condenser including the connecting body part, the condenser is characterized in that the upper-stage feed water heater and the lower-stage feed water heater arranged in a row are covered with an outer cover. 5. The condenser according to claim 4, wherein the outer cover has a streamlined shape. 6. The back cover according to claim 4, wherein the outer casing is provided with a turbine exhaust suction port on a body wall side of the connection body part and a turbine exhaust discharge port is provided on an outlet side of the connection body part. Water bottle. 7. One side is connected to a steam turbine, and an upper stage feed water heater and a lower stage feed water heater which are arranged in a row along a flow of turbine exhaust from the steam turbine are mounted in an intermediate portion. In the condenser provided with the connecting body portion, the upper stage side feed water heater and the lower stage side feed water heater arranged in the row are arranged on the body wall side of the connecting body portion to form a wide central passage of turbine exhaust. However, the condenser is characterized in that the upper-stage feed water heater and the lower-stage feed water heater arranged in rows are covered with an outer cover. 8. The condenser according to claim 7, wherein the outer cover is formed in a streamlined shape. 9. The restoration according to claim 7, wherein the outer casing is provided with a turbine exhaust suction port on the central passage side of the connecting body portion and a turbine exhaust outlet port on the outlet side of the connecting body portion. Water bottle. 10. One side is connected to a steam turbine, and an upper stage feed water heater and a lower stage feed water heater, which are arranged in a row along the flow of turbine exhaust from the steam turbine, are mounted in an intermediate portion. In the condenser including the connecting body part, the upper side feed water heater arranged in the row is provided with a guide plate formed in a dome shape toward the steam turbine side. 11. An upper stage side feed water heater and a lower stage side feed water heater which are arranged in a row along a flow of turbine exhaust from the steam turbine and which are connected to one side to a steam turbine are mounted in an intermediate portion. In the condenser including the connecting body portion, the condenser is provided with a cusp in each of the upper stage side feed water heater and the lower stage side feed water heater arranged in the row. 12. The cusp provided in the upper feed water heater,
The condenser according to claim 11, wherein the condenser is formed in a funnel shape toward the steam turbine side. 13. The cusp provided in the lower feed water heater,
The condenser according to claim 11, wherein the condenser is formed in a funnel shape toward the outlet side of the connection body portion. 14. The cusp provided in the upper feed water heater comprises:
The condenser according to claim 11, wherein the condenser is formed in a tapered elliptical shape that rises toward the steam turbine side. 15. The cusp provided in the lower feed water heater,
The condenser according to claim 11, wherein the condenser is formed in a tapered elliptical shape that rises toward the outlet side of the connection body portion. 16. An upper stage side feed water heater and a lower stage side feed water heater which are arranged in a row along a flow of turbine exhaust from the steam turbine are mounted at an intermediate portion while connecting one side to the steam turbine. In the condenser provided with the connecting body portion, the connecting body portion is formed with a throttle passage in an intermediate portion thereof, an expansion passage is formed on the outlet side thereof, and along the body wall outside the connecting body portion. A condenser characterized by arranging the upper stage side feed water heater and the lower stage side feed water heater in order. 17. A condenser comprising a connecting body portion, one side of which is connected to a steam turbine, and a plurality of feed water heaters, which are sequentially arranged along a flow of turbine exhaust from the steam turbine, are mounted in an intermediate portion. In the condenser, the plurality of feed water heaters mounted on the connection body portion are arranged in a meandering shape from the steam turbine side toward the outlet of the connection body portion. 18. The condenser according to claim 17, wherein the plurality of feed water heaters arranged in a meandering pattern have an intersection point of each side of the triangle at the installation center position. 19. A plurality of feed water heaters having an installation center position at an intersection of each side of a triangle has a staggered distance between one central axis line connecting the installation center positions and the other central axis line connecting the installation center positions. 18. The condenser according to claim 17, wherein the condenser is set to be smaller than an average diameter of the plurality of feed water heaters.