JP3138778B2 - Condenser using turbine base as steam room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser for a turbine, and more particularly to a condenser for a turbine in which a turbine base made of concrete is used as a part of its components.

[0002]

2. Description of the Related Art A turbine generator unit in a thermal power plant or the like is usually installed on a concrete base. In this foundation, generally rectangular beams are integrally formed on a plurality of concrete legs. And it is constructed by integrally connecting the generator base and the turbine base, and the space surrounded by the beams and legs in the generator base is used as a generator inspection space. A similar space is used as a space for installing a condenser for the turbine. FIG. 4 is an example of a concrete base of the turbine generator unit,
The generator base 1 and the turbine base 2 are integrally connected. And a generator base 1 and a turbine base 2
Has a beam 49 and a leg 47, respectively.

The beam 49 of the generator base 1 is provided with an opening 7 for accommodating the lower part of the generator, and an opening 8 as a passage is provided between the legs 47. A space 9 is formed by the beam 49 and the leg 47. on the other hand,
The beam portion 49 of the turbine base 2 is provided with an opening 10 for accommodating a lower portion of the turbine, and the opening 11 is provided between the legs 47 as a passage. The beam portion 49 and each leg portion 47 form the space portion 12, and the turbine rest indicated by a chain line on a plurality of concrete bases 50 projecting from a floor surface 48 provided below the space portion 12. A water container 14 is installed. An insertion portion 15 for inserting a turbine exhaust pipe connected to the steam chamber of the condenser 14 is provided in a part of the opening 10. The condenser 14 has a metal steam chamber and a cooling water pipe unit, and is usually assembled in a factory, transported by a trailer or the like, and installed at the site. However, when the capacity is large, there are restrictions on transportation and import. It is manufactured by being divided into a plurality of units and assembled by welding or bolting on site.

[0004]

However, in such a conventional condenser, all of its components are manufactured in a factory, and are carried on-site and installed. Therefore, the outer dimensions and weight are increased, and transportation and carrying-in are performed. There was a problem that many man-hours were required for assembly. Further, as described above, when the capacity is large, there is a problem that divisional production and on-site assembly are required, and further, a large number of man-hours, an installation period, and a high cost are required. During operation, the inside of the condenser is maintained at a negative pressure, and steam is smoothly introduced from the turbine. Therefore, a large number of various reinforcing members that can withstand the negative pressure have been required. The present invention has problems in manufacturing, transporting, carrying in and installing such a conventional condenser,
It is another object of the present invention to solve a problem that requires a large amount of reinforcing material.

[0005]

Condenser of the present invention to solve the above problems SUMMARY OF THE INVENTION are made each concrete, a bottom wall (23)
A peripheral wall (6) is formed on the top, and a top wall (5) is formed on the peripheral wall (6).
Formed on the top wall (5) where the turbine is installed
It has a REIT turbine base (2), the bottom wall (23),
The concrete inner surfaces of the peripheral wall (6) and the top wall (5)
Steam room (21) directly used as the inner surface of the steam room
And turbine exhaust communication provided at the opening of the top wall (5).
Part (24) and a condensate communication part provided at the opening of the bottom wall (23)
(25), and a pair of openings that are opened on the facing surface of the peripheral wall (6).
A pair of tube sheets (37) respectively provided in (26) and a large number of cooling water
Both ends of the tube (36) are supported by the pair of tube sheets (37).
Comprising cooling pipe unit (22), comprising a said cooling water pipe
The unit (22) is a husband of the bottom wall (23), the peripheral wall (6) and the top wall (5).
While being directly covered by various concrete inner surfaces,
A pair of openings (26) provided in the peripheral wall (6) is formed by the tube sheet (37).
It is characterized by being closed in a liquid-tight manner .

[0006]

According to the present invention, the top, bottom and peripheral walls of the turbine base are used as the top, bottom and peripheral walls of the steam chamber in the condenser, respectively. There is no. This significantly reduces the man-hours, time and cost of manufacturing, transporting, carrying in and installing. Further, even if the capacity becomes large, there is no need to manufacture the parts separately. In addition, the installation requires only a relatively small weight of the cooling water pipe unit, so that the operational risks are also significantly reduced. Further, there is no need to reinforce the wall against internal negative pressure, and a large amount of reinforcing material used in the conventional condenser is not required.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an example of the condenser of the present invention.
The condenser 20 has a steam chamber 21 and a cooling water pipe unit 22. The steam chamber 21 includes a top wall 5, a bottom wall 23, and a peripheral wall 6, and these walls are respectively used in common with the top, bottom, and peripheral walls of the concrete turbine base 2. The turbine exhaust communication portion 24 and the bottom wall 2 are provided on the top wall 5.
3 is provided with a condensate communication part 25, respectively.
A pair of openings 26 facing the peripheral wall are provided. In addition, an inspection port 27 for an operator to enter the inside of the steam chamber is provided as necessary at the upper part of the peripheral wall 6.

The turbine exhaust communication portion 24 is constituted by an opening 28 provided in the top wall 5 and a flange-like connecting member 29 embedded in a peripheral portion of the opening 28.
An opening edge of the turbine exhaust pipe 30 is connected to the connecting member 29 in a liquid-tight manner by welding or packing (not shown) and a fastening bolt. Reference numeral 31 denotes an expander for absorbing thermal expansion of the turbine exhaust pipe 30. The condensate communication part 25 is provided with an opening 32 provided in the bottom wall 23 and the opening 3
2 is composed of a flange-shaped connecting member 33 embedded in the peripheral portion and a disk-shaped bottom plate member 34 flange-connected to the connecting member 33. The opening edge of the condenser pipe 35 is connected to the bottom plate member 34 in a liquid-tight manner by welding or the above-mentioned fastening bolt. In order to form the condensate communication section 25, instead of providing such an opening 32, the upper surface of the bottom wall 23 is formed in a mortar shape, and a condensate pipe 35 is formed on the bottom thereof.
May be arranged.

The cooling water pipe unit 22 includes a plurality of cooling water pipes 3.
6. The cooling water pipe 36 has a pair of tube sheets 37 that support the openings at both ends. The cooling water pipe 36 is divided into two upper and lower subunits, the whole of which is arranged in a circular cross-sectional shape, and an intermediate portion thereof is supported by a plurality of sasai plates 38 at appropriate intervals. Both the upper water chamber 39 communicating with one opening of the cooling water pipe 36 of the upper subunit and the lower water chamber 40 communicating with one opening of the cooling water pipe 36 of the lower subunit are connected to the tube sheet 37 on the right side of FIG. Are connected to each other, and the cooling water pipe 36 of the upper subunit is
And a hemispherical intermediate water chamber 4 for communicating the respective other openings of the cooling water pipes 36 of the lower subunit with each other.
1 are connected.

The bottom surface of the lower part of the cooling water pipe unit 22 is supported by a rail 42 if desired, so that the cooling water pipe unit 22 can be easily moved at the time of repair or the like. The rail 42 is supported on the upper surface of the bottom wall 23 by support members 43 provided at appropriate intervals. A connecting portion between the pair of tube sheets 37 and each of the water chambers is a flange-shaped connecting member 44 embedded in the opening edge of the opening 26.
Are connected in a liquid-tight manner. FIG. 2 is a partially enlarged cross-sectional view for explaining a connection state of the connection member 44 and the tube sheet 37 and the like in the opening 26. Tube sheet 37 and intermediate water chamber 41
Are respectively bolt 45 and nut 46
Thus, it is liquid-tightly connected to the connecting member 44 via an appropriate packing. FIG. 3 shows the overall arrangement of the generator base 1 and the turbine base 2 and the steam chamber portion of the condenser 20 shown in FIG. 1 before the turbine exhaust pipe, the condenser pipe, the cooling water pipe unit and the like are attached. The state is shown.

To install the condenser shown in FIG. 1, first, when constructing the generator base 1 and the turbine base 2, the top wall 5
The connecting members 29, 3 are provided in advance on the opening edges of the opening 28 of the bottom wall 23, the opening 32 of the bottom wall 23, and the opening 26 of the peripheral wall 6.
3 and 44 are attached by means such as embedding. Further, a support member 43 is fixed to the bottom wall 23, and a rail 42 is attached to the support member 43. Next, the cooling water pipe unit 22 produced and carried in the factory is installed on the rail 42,
The connecting portions of the pair of tube plates 37 and the respective water chambers are liquid-tightly connected to the connecting members 44 of the openings 26, respectively. At the same time, the turbine exhaust pipe 30 is connected to the connecting member 29, the condensing pipe 35 is connected to the connecting member 33 via the bottom plate member 34, and the cooling water supply pipe (not shown) and the cooling water are connected to the upper water chamber 39 and the lower water chamber 40. Connect the water discharge pipe.

The operation of this condenser will be described. The cooling water flows in the upper water chamber 39-the cooling water pipe 36 of the upper sub-unit-the intermediate water chamber 41-the cooling water pipe 3 of the lower sub-unit as shown by arrows.
6-Flowed down the lower water chamber 40. On the other hand, the turbine exhaust is introduced into the upper part of the steam chamber 21 from the turbine exhaust pipe 30 via the turbine exhaust communication part 24, cooled by the cooling water pipe unit 22, condensed, and collected as condensed water at the bottom of the steam chamber 21. This condensate is discharged to the outside via a condensate communication part 25 by a condensate pipe connected to a condensate pump.
As described above, since the turbine exhaust is condensed in the steam chamber 21 using the space of the concrete turbine base 2 and stored as condensate, at least the inner wall surface of the steam chamber 21 may have waterproofness. preferable. For this purpose, for example, a method of constructing a portion forming the steam chamber 21 with waterproof concrete, coating the inner surface of the steam chamber 21 with a waterproof layer, and the like can be mentioned.

[0013]

The condenser of the present invention having the above-described structure has the following effects. (1) Since the top wall, bottom wall and peripheral wall of the steam chamber are formed using the turbine base, there is no need to manufacture the steam chamber at a factory and carry it on site. (2) Man-hours, periods and costs for manufacturing, transporting, carrying in and installing are greatly reduced. (3) Even if the capacity becomes large, there is no need to manufacture separately. (4) Since the installation requires only the cooling water pipe unit having a relatively small weight, the danger at the time of work is significantly reduced. (5) The maintenance and inspection of the steam chamber is almost unnecessary, and the main inspection and repair are performed only by the cooling water pipe unit, and the man-hour and cost required for maintenance and repair are reduced. (6) It is not necessary to reinforce the wall against internal negative pressure, and a large amount of internal reinforcing material used in the conventional condenser is not required.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a condenser according to the present invention.

FIG. 2 is a partially enlarged sectional view of an opening 26 in FIG. 1;

FIG. 3 shows a generator base 1 and a turbine base 2 and FIG.
The perspective view which shows the whole arrangement relationship with the steam chamber part of the condenser 20 shown in FIG.

FIG. 4 shows a conventional generator base 1 and turbine base 2
FIG. 2 is a perspective view showing a relationship between the condenser and a condenser installed in a space of the turbine base 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Generator base 2 Turbine base 3 Top wall 4 Peripheral wall 5 Top wall 6 Peripheral wall 7 Opening 8 Opening 9 Space part 10 Opening 11 Opening 12 Space part 13 Bottom wall 14 Condenser 15 Insertion part 20 Condensation Container 21 Steam chamber 22 Cooling water pipe unit 23 Bottom wall 24 Turbine exhaust communication part 25 Condensate communication part 26 Opening 27 Inspection port 28 Opening 29 Connecting member 30 Turbine exhaust pipe 31 Expander 32 Opening 33 Connecting member 34 Bottom plate member 35 Condenser pipe 36 Cooling water pipe 37 Tube plate 38 Sasai board 39 Upper water chamber 40 Lower water chamber 41 Intermediate water chamber 42 Rail 43 Supporting member 44 Connecting member 45 Bolt 46 Nut 47 Leg 48 Floor 49 Beam 50

Claims (1)

(57) [Claims] A peripheral wall (6) is formed on a bottom wall (23) made of concrete , and a top wall (5) is formed on the peripheral wall (6), and a turbine is mounted on the top wall (5). It has a concrete turbine base (2) to be installed, and has concrete walls for the bottom wall (23), peripheral wall (6) and top wall (5).
Can be used directly as the inner surface of the steam chamber.
Steam chamber (21) which, said top wall (5) turbine exhaust communicating portion provided on the opening (2
4), a condensate communication portion (25) provided at the opening of the bottom wall (23), and a pair of openings (26) opened at the facing surface of the peripheral wall (6).
A pair of individually provided tube sheets (37) and a plurality of cooling water pipes (36) provided with cooling water pipes (36) having openings at both ends supported by the pair of tube sheets (37).
A water pipe unit (22) , wherein the cooling water pipe unit (22) is provided with the bottom wall (23),
Directly on the concrete inner surface of the surrounding wall (6) and the top wall (5)
A pair of openings that are covered and provided in the peripheral wall (6)
(26) A condenser using a turbine base as a steam chamber, wherein the condenser is liquid-tightly closed by the tube sheet (37).