JP2000161013A - Thermal power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce costs of construction by serially disposing a turbine, a power generator driven by the turbine, and a waste heat recovery boiler for supplying energy to a steam turbine by recovering waste heat from the turbine, in a vertical direction, and disposing a stack having a required height. SOLUTION: Rotary shafts of a steam turbine 23, a power generator 25, and a gas turbine 27 are disposed in series in a vertical direction. Fuel such as natural gas is supplied to the gas turbine 27, exhaust gas from the gas turbine 27 is raised through a flue 29 to be supplied to a waste heat recovery boiler 31. Waste is fed to a feed waste tube arranged on an upper end of the waste heat recovery boiler 31, and is converted into steam by waste heat of the gas turbine 27. And then, it is supplied to a steam turbine 23 through a steam pipe so as to rotate the steam turbine 23. The power generator 25 is driven by the gas turbine 27 and the steam turbine 23. Exhaust gas having passed the waste heat recovery boiler 31 is supplied to a stack 36 through a flue 33 to be discharged to high atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a thermal power plant comprising a generator driven by a turbine and an exhaust heat recovery boiler for recovering the exhaust heat of the turbine and returning it to the turbine. The present invention relates to a vertical (vertical) thermal power plant that can significantly reduce the construction site area.

[0002]

2. Description of the Related Art A thermal power plant uses LNG, petroleum, coal or the like as a main fuel to rotate a turbine and transmits the rotation of the turbine to a generator to generate power. recently,
Using a gas turbine as the turbine, the exhaust heat of this gas turbine is recovered by an exhaust heat recovery boiler to generate steam, which drives the steam turbine and further drives the generator to improve energy efficiency. Is increasing. Further, a chimney for discharging exhaust gas from the gas turbine and the exhaust heat recovery boiler, that is, exhaust gas to a certain height above the ground is required. The chimney has a height of about 200 meters above the ground for solving environmental problems.

[0003] As described above, the conventional thermal power plant is a gas-fired power plant.
A turbine room in which a turbine and a steam turbine are installed,
A generator room in which a generator is installed, an exhaust heat recovery boiler, a chimney, and a central control room for controlling these are each constructed in a planar arrangement with a large area. And 20 above the ground
Due to the presence of a tall chimney of 0 m, it is constructed in a very large three-dimensional space. In some cases, the generator is disposed in the turbine room.

FIGS. 10 and 1 show an example of a current thermal power plant.
It is shown in FIG. FIG. 10 is a plan view of the thermal power plant, and FIG. 11 is a side view taken along line AA in FIG.

In a turbine room (turbine building) 10, a plurality of combinations of a gas turbine rotationally driven by LNG gas, a steam turbine, and a generator driven by the gas turbine and the steam turbine are provided. Pairs (eight in the figure) are arranged. One exhaust heat recovery boiler 12 is arranged for each of the eight turbine and generator combinations. The exhaust heat recovery boiler 12 recovers the exhaust heat from the gas turbine, converts water into steam using the heat, and drives the steam turbine using the steam as energy. The exhaust gas from the turbine and the exhaust heat recovery boiler 12 is
The four exhaust heat recovery boilers 12 are exhausted from the chimney 14 as one set.

Next, Japanese Utility Model Application Laid-Open No. 64-51704 discloses a thermal power plant configured to save the area of a site. In this thermal power plant, a turbine and generator building and a boiler building were installed in a line on each side of the central operation room, and were connected to two sets of boilers along these straight buildings. A chimney is installed, and smoke is discharged from a single chimney located near the central control room.

In Japanese Patent Application Laid-Open No. 49-28728, a plurality of boilers are installed at the center, a generator is arranged in a machine room installed outside these boilers, and a common chimney is placed above the boiler. The deployed thermal power plants are listed.

[0008]

SUMMARY OF THE INVENTION Conventional thermal power plants are:
Since the turbine room, generator room, exhaust heat recovery boiler, chimney and control room are constructed in a planar arrangement, the construction of a thermal power plant requires, for example, a vast construction site as large as 300 m on each side. Construction costs, including land costs. Since a thermal power plant is composed of one unit (that is, one set) of a turbine room, a generator room, a heat recovery steam generator and a chimney, and is usually constructed as a multi-unit thermal power plant using a plurality of such units, furthermore, Costs are rising. Therefore, it has been conventionally desired to reduce the construction cost of a thermal power plant, and various proposals have been made.

In addition, thermal power plants, without exception, must be replaced before they reach their end of life. In that case, there is no room to dismantle the existing thermal power plant and clear it up to build a new thermal power plant in order to maintain the current power supply. That is, it is required to secure a replacement site of the same size as that of the current thermal power plant, construct a new thermal power plant with a capacity equal to or higher than that, and continue the power supply without interruption.

However, in places where land is narrow and confined, as in Japan, it is extremely difficult to secure a rebuilding site at a location adjacent to the current thermal power plant that is at least equivalent to the current thermal power plant. Yes, and the land acquisition costs will be huge, squeezing the cost of building new thermal power plants.

[0011] In this regard, it is recognized that the thermal power plant described in Japanese Utility Model Application Laid-Open No. 64-51704 can use the site more effectively than a configuration in which the flue is extended in a direction perpendicular to a straight building. However, all facilities are still spread out in a plane, which limits the savings on the site area.

Although the boiler and the chimney of the thermal power plant described in the above-mentioned Japanese Patent Application Laid-Open No. 49-28728 are arranged vertically, it is recognized that the site can be effectively used. These facilities are also installed with a flat spread, and there is a limit in saving the site area.

Accordingly, an object of the present invention is to provide a vertical thermal power plant that can be effectively constructed in a small building area and can reduce construction costs.

Another object of the present invention is to provide a vertical thermal power plant which does not require a separate construction of a high chimney.

Still another object of the present invention is to provide a thermal power plant capable of reducing maintenance costs.

[0016]

Means for Solving the Problems As means for solving the above-mentioned problems of the prior art, a thermal power plant according to claim 1 is provided.
A turbine, a generator driven by the turbine,
An exhaust heat recovery boiler that recovers exhaust heat from the turbine and supplies energy to the steam turbine is arranged in series in the vertical direction, and a chimney reaching a required height is further provided above the exhaust heat recovery boiler. It is characterized by.

According to a second aspect of the present invention, in the thermal power plant according to the first aspect, the turbine comprises a gas turbine and a steam turbine which are arranged in series in a vertical direction.

According to a third aspect of the present invention, in the thermal power plant according to the first aspect, the power generator is disposed between the steam turbine and the gas turbine.

According to a fourth aspect of the present invention, in the thermal power plant according to the first or third aspect, the power generator is disposed below the steam turbine in the vertical direction.

According to a fifth aspect of the present invention, in the thermal power plant according to the first aspect, the chimney is disposed above the exhaust heat recovery boiler in the vertical direction, and discharges exhaust gas from at least one of the turbine and the exhaust heat recovery boiler. It is characterized by doing.

According to a sixth aspect of the present invention, there is provided the thermal power plant according to the first aspect, wherein a plurality of sets including a vertical combination of a steam turbine, an exhaust heat recovery boiler, a generator, and a chimney are arranged in parallel. The plurality of sets are installed in a mega-frame frame-type building including a mega pillar and a mega beam.

According to a seventh aspect of the present invention, in the thermal power plant according to the sixth aspect, a single chimney is provided as a common chimney receiving exhaust from a plurality of sets.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermal power plant according to the present invention will be described below with reference to FIGS.

FIGS. 1 to 3 show an embodiment of the invention described in claims 1 to 7. 1 is a schematic elevational view, FIG. 2 is a plan view along line AA of FIG. 1, and FIG.
FIG. 4 is a plan view taken along line BB of FIG.

In this embodiment, "4 units", that is, 4 units
A thermal power plant is composed of a set of power generation facilities. The building of the thermal power plant is constructed in the form of a mega frame having four mega pillars 20 and four mega beams 22 arranged at four corners of a rectangular plane as main elements. In this building, a steam turbine room (and a condenser room) 24 in which a steam turbine 23 is installed, a generator room 26 in which a generator 25 is installed, and a gas turbine 27 are installed from lower to upper layers. A first flue chamber 30 in which a first flue 29 is installed, an exhaust heat recovery boiler chamber 32 in which an exhaust heat recovery boiler 31 is fixedly installed, and a second flue 33 Each of the installed second flue chambers 34 is constituted by a set of "4 units" in which a series of arrangements are made in the vertical direction.

The steam turbine room (and the condenser room) 24
It is located underground. Girder 3 at the boundary of each floor
8 to build a mega-frame structure. In each of the four sets of power generation equipment, the rotating shafts of the steam turbine 23, the generator 25, and the gas turbine 27 are linear in a vertical direction. The gas turbine 27 has a fuel supply path (not shown).
Fuel such as natural gas is supplied from the outside via the. The exhaust gas from the gas turbine 27 rises through the flue 29 and is supplied to the exhaust heat recovery boiler 31. Water is supplied to the upper end of the exhaust heat recovery boiler 31 from outside through a water supply pipe (not shown), and the water is converted into steam by the exhaust heat of the gas turbine 27. This steam is supplied to the steam turbine 23 through a steam pipe (not shown), and rotates the steam turbine. Thus, the generator 25 is rotated by both the gas turbine 27 and the steam turbine 23 to use fuel efficiently. After that, the steam becomes water in the condenser,
Circulated. The electricity generated by the generator 25 is transmitted to the outside via a transformer.

The exhaust gas (smoke exhaust) that has passed through the exhaust heat recovery boiler 31 is supplied to a chimney 36 through a flue 33 and discharged into the high atmosphere. In this embodiment, a single chimney 36 is shared by four sets of exhaust heat recovery boilers 31. However, the steam turbine 23, the generator 25, the gas turbine 27, the first flue 29, the exhaust heat recovery boiler 31, the second flue 3
3 is already 180 m above the ground only by the height of the components that are arranged in a series in the vertical direction.
The height of 6 is substantially only about 20 m.

Steam turbine 23 and gas turbine 27
Is performed in each room. As shown in FIG. 2, the gas turbine room 28 has a space in the center of the building where a spacious space is vacant. The gas turbines 27 are put in and out sequentially in the vertical arrangement as needed to perform maintenance and inspection. In addition, mega pillar 20,
A machine room 42 and a maintenance stage 44 are provided on the girder 38 between 20.

Next, FIGS. 4 to 6 show different embodiments of the invention described in claims 1 to 7. FIG. 4 is a schematic sectional view, and FIG. 5 is a plan view along the line AA in FIG. FIG. 6 is a plan view along line BB in FIG. Hereinafter, points different from the embodiment of FIGS. 1 to 3 will be mainly described.

In the above-described first embodiment, the steam turbine room (and the condenser room) 24 is provided on the same floor underground. In the second embodiment, the condenser room 46 is provided on the lowest floor.
The steam turbine room 48 is provided independently on the upper floor, and the condenser room 46 is underground.

In the exhaust heat recovery boiler room 32, the exhaust heat recovery boiler 31 is suspended from the mega beam 22 by a suspension rod 50 to form a suspended seismic isolation structure. It is provided for the mega beam 22. Since the exhaust heat recovery boiler 31 is suspended, the chimney 36 is provided individually for each exhaust heat recovery boiler 31. As shown in FIG. 5, the maintenance work of each turbine is performed by the work robot 40 on each floor.

FIGS. 7 to 9 show a third embodiment of the present invention. 7 is a schematic cross-sectional view, FIG. 8 is a plan view along line AA in FIG. 7, and FIG. 9 is a plan view along line BB in FIG.

The difference from the first and second embodiments is that the structure of the building is a reinforced concrete structure (RC), and the RC walls 60 and the RC floor 62 support equipment on each floor. On the girder 61 above the second flue chamber 34, a tropical biotob / heated pool / observation room 63 is provided as a regional symbiotic facility using waste heat.

In short, in the thermal power plant of the present invention, the turbine, the generator, the exhaust heat recovery boiler and the chimney, which constitute one unit, are vertically arranged in a series in the vertical direction. For the construction site, for example, the flat area of the steam turbine room is sufficient, and the site area required for the construction of the power plant can be greatly reduced, for example, to about one-fourth as compared with the related art.

Even when building a multi-unit thermal power plant,
Land can be significantly reduced. In addition, since the “units” of the turbine, the generator, and the exhaust heat recovery boiler are arranged linearly in the vertical direction, the upper end of the exhaust heat recovery boiler 31 is located at a considerable height from the ground. Eliminating the need for 36 or reducing the length of the chimney can be significant, yet the exhaust outlet can be of sufficient ground level. Furthermore, by installing this thermal power plant in a mega-frame framing-type building composed of mega pillars 20 and mega beams 22, construction costs can be further reduced and maintenance costs can be reduced.

[0036]

In each of the embodiments described above, the height of the chimney 36 at the tip is about 200 meters above the ground, but the actual length of the chimney itself is the "one unit" height of the thermal power plant,
Alternatively, the difference between the height of the upper end of the exhaust heat recovery boiler 31 supporting the same and the above-mentioned 200 meters may be sufficient. In embodiments where the required smoke exhaust height does not need to be very high, the chimney may not be required. Steam turbine room 24 or 4
If 8 etc. dives underground, its depth is about 20 meters. The plane shape of the turbine chamber has a side length of about 70
It is the size of a meter. The length of one side of the mega pillar 20 having a rectangular cross section is about 10 meters. Although the site of a “conventional thermal power plant” with a power output of 2.8 million kilowatts required about 300 m × 300 meters, according to the present invention, the site of a thermal power plant having a power generation capacity of the same scale is 10 yards.
It can be reduced to 0 meters x 140 meters. Therefore, the site area required in the embodiment of the present invention is 1/6 to the conventional one.
The cost can be reduced by a factor of one, and the land cost can be significantly reduced.

Although the preferred embodiments and examples of the present invention have been described above, various modifications and changes can be made without departing from the gist of the present invention. For example, a configuration in which the units of a power plant are arranged vertically in the order of steam turbine, generator and gas turbine from the bottom up has been described, but the order of the generator, steam turbine and gas turbine is also shown. Good. However, since flue gas rises from the bottom up, it is important from an energy efficiency point of view to dispose a heat recovery steam generator just above the gas turbine. If necessary, the central operation room and the office building may be provided beside the mega pillar.

[0038]

According to the first to seventh aspects of the present invention, a vertical type in which a "one unit" of a turbine, a generator and an exhaust heat recovery boiler constituting a thermal power plant are arranged in series in a vertical direction. Therefore, it is possible to construct efficiently on a small site area, and it is possible to achieve a reduction in the land area and a substantial reduction in the construction cost associated therewith. Therefore, an old thermal power plant can be easily replaced at low cost.

Further, since the chimney is placed on the exhaust heat recovery boiler, the length of the chimney can be shortened. If the height to the exhaust heat recovery boiler has reached the height required for smoke exhaust, the chimney Can be unnecessary. Further, since maintenance work can be performed intensively on each floor, maintenance costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a first embodiment of a thermal power plant according to the present invention.

FIG. 2 is a plan view cut along the line AA of FIG. 1;

FIG. 3 is a plan view cut along a line BB of FIG. 1;

FIG. 4 is a schematic side view showing a second embodiment of the thermal power plant according to the present invention.

FIG. 5 is a plan view cut along the line AA of FIG. 4;

FIG. 6 is a plan view taken along line BB of FIG. 4;

FIG. 7 is a schematic side view showing a third embodiment of the thermal power plant according to the present invention.

FIG. 8 is a plan view cut along the line AA of FIG. 7;

FIG. 9 is a plan view cut along the line BB of FIG. 7;

FIG. 10 is a plan view of a conventional thermal power plant.

FIG. 11 is a side view cut along the line AA of FIG. 10;

[Explanation of symbols]

 Reference Signs List 20 mega pillar 22 mega beam 23 steam turbine 24 steam turbine room / condenser room 25 generator 26 generator room 27 gas turbine 28 gas turbine room 29 first flue 31 waste heat recovery boiler 32 waste heat recovery boiler room 33 second flue 36 chimney 38 girder 46 condenser room 48 steam turbine room

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Gen Taniguchi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Center, Takenaka Corporation (72) Inventor Atsushi Uebayashi 1-5-5 Otsuka, Inzai City, Chiba Prefecture 1 Inside Takenaka Corporation Technical Research Institute, Inc. (72) Inventor Osamu Nojima 8-21-1, Ginza, Chuo-ku, Tokyo F-Terminator, Tokyo Head Office F-term (reference) 3G081 BA02 BC07

Claims (7)

[Claims] 1. A turbine, a generator driven by the turbine, and an exhaust heat recovery boiler that recovers exhaust heat from the turbine and supplies energy to a steam turbine.
A thermal power plant characterized by being vertically arranged in series, and further having a chimney of a required height above it. 2. The thermal power plant according to claim 1, wherein the turbine comprises a gas turbine and a steam turbine arranged in series in a vertical direction. 3. The generator according to claim 1, wherein the generator is arranged between the steam turbine and the gas turbine.
Thermal power plant described in. 4. The thermal power plant according to claim 1, wherein the power generator is disposed below the steam turbine in the vertical direction. 5. The thermal power plant according to claim 1, wherein the chimney is disposed above the exhaust heat recovery boiler in a vertical direction, and discharges exhaust gas from at least one of the turbine and the exhaust heat recovery boiler. Place. 6. A mega-frame frame type comprising a plurality of sets each including a vertical combination of a steam turbine, an exhaust heat recovery boiler, a generator, and a chimney. The thermal power plant according to claim 1, wherein the plurality of sets are installed in a building. 7. The thermal power plant according to claim 6, wherein a single chimney is provided as a common chimney receiving exhaust from a plurality of sets.