JP3898847B2 - Thermal power plant - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a thermal power plant that includes a generator driven by a turbine and an exhaust heat recovery boiler that recovers exhaust heat from the turbine and returns it to the turbine, and particularly significantly reduces the construction area. The present invention relates to a thermal power plant configured vertically (vertical type) as possible.
[0002]
[Prior art]
A thermal power plant rotates a turbine using LNG, oil, coal, or the like as main fuel, and transmits the rotation of the turbine to a generator to generate power. Recently, by using a gas turbine as a turbine, the exhaust heat of this gas turbine is recovered by an exhaust heat recovery boiler to generate steam, and the steam turbine is driven by this steam, and further the generator is driven. Increases energy efficiency. There is also a need for an exhaust from the gas turbine and exhaust heat recovery boiler, that is, a chimney for discharging the exhaust smoke to a certain height above the ground. The chimney has a height of about 200 meters to solve environmental problems.
[0003]
Thus, the conventional thermal power plant has a turbine room in which a gas 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 center for controlling these. The operation room is constructed in a wide area with a planar arrangement. Moreover, it is built in a very large three-dimensional space due to the presence of a high chimney extending over 200 meters above the ground. In some cases, the generator is disposed in the turbine chamber.
[0004]
An example of the current thermal power plant is shown in FIGS. FIG. 10 is a plan view of the thermal power plant, and FIG. 11 is a side view taken along line AA of FIG.
[0005]
In the turbine room (turbine building) 10, there are a plurality of combinations of a gas turbine rotated by LNG gas, a steam turbine, and a generator driven by the gas turbine and the steam turbine (see FIG. Then there are 8 sets). One exhaust heat recovery boiler 12 is arranged in each of the eight turbine and generator combinations. The exhaust heat recovery boiler 12 recovers exhaust heat from the gas turbine, converts water into steam by this 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 exhausted from the chimney 14 as a set of four exhaust heat recovery boilers 12.
[0006]
Next, Japanese Utility Model Laid-Open No. 64-51704 discloses a thermal power plant configured to save site area. This thermal power plant has a turbine and generator building and a boiler building on each side of the central control room, and is connected to two sets of boilers along these straight buildings. A flue is installed and exhausted from a single chimney installed near the central control room.
[0007]
Japanese Patent Laid-Open No. 49-28728 discloses that a plurality of boilers are installed in the center, a generator is arranged in a machine room installed outside these boilers, and a common chimney is arranged on the boiler. The thermal power plant is described.
[0008]
[Problems to be solved by the invention]
Conventional thermal power plants have a turbine room, a generator room, a waste heat recovery boiler, a chimney, and a control room that are constructed in a flat layout. Large construction land is required, and construction cost including land cost is high. A thermal power plant consists of a turbine room, a generator room, an exhaust heat recovery boiler and a chimney in one unit (ie, one set), and is usually constructed as a multi-unit thermal power plant that uses a plurality of such units. The cost is raised. Therefore, it has been conventionally desired to reduce the construction cost of a thermal power plant, and various proposals have been made.
[0009]
In addition, thermal power plants must be replaced before they reach the end of their lives. In that case, in order to maintain the current power supply, there is no room to dismantle the current thermal power plant and clear it, and then build a new thermal power plant. That is, it is required to secure a replacement site of the same size as that of the current thermal power plant, to build a new thermal power plant with an equivalent capacity or more, and to continue power supply without interruption.
[0010]
However, where land is small and limited like Japan, it is difficult to secure a land for replacement at the same level as the current thermal power plant in a place adjacent to the current thermal power plant. Land acquisition costs will be enormous, putting pressure on the construction costs of new thermal power plants.
[0011]
In this regard, it is recognized that the thermal power plant described in Japanese Utility Model Publication No. 64-51704 can effectively use the site as compared with the configuration in which the flue is extended in a direction perpendicular to the straight building. All the facilities are still flat and there is a limit to the savings on the site area.
[0012]
In the thermal power plant described in the above-mentioned JP-A-49-28728, since the boiler and the chimney are arranged in the vertical direction, it is recognized that the site can be used effectively, but facilities other than the boiler and the chimney are It is also installed with a flat spread, and there is a limit to the saving of site area.
[0013]
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 the construction cost.
[0014]
Another object of the present invention is to provide a vertical thermal power plant having a configuration that does not require a separate construction of a high chimney.
[0015]
Still another object of the present invention is to provide a thermal power plant that can reduce maintenance costs.
[0016]
[Means for Solving the Problems]
As a means for solving the problems of the prior art, the thermal power plant described in claim 1 is:
A steam turbine 23 and a gas turbine 27 ; a generator 25 driven by the turbine; a waste heat recovery boiler 31 that recovers exhaust heat from the gas turbine 27 and supplies energy to the steam turbine 23 ; and A combination in which the flues 29 and 33 are arranged in series in the vertical direction is configured as a set of power generation equipment, and the steam turbine chamber 24 and the generator chamber 26, the gas turbine chamber 28, and the waste are formed from the lower layer to the upper layer. In a building in which the heat recovery boiler chamber 32 and the flue chambers 30 and 33 are arranged in a series in the vertical direction , a plurality of sets of the power generation facilities are arranged side by side in plan view. A chimney 33 constituting the facility is connected to an upper chimney 36 .
[0017]
The invention according to claim 2 is the thermal power plant according to claim 1,
The turbine is characterized by comprising a gas turbine 27 and a steam turbine 23 which are installed in series above and below a generator 25 with a vertical rotating shaft sandwiched therebetween .
[0022]
The invention according to claim 3 is the thermal power plant according to claim 1,
The flue 33 in a plurality of sets of power generation facilities is connected to a common single chimney 36 .
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on FIGS. 1-9, embodiment of the thermal power plant which concerns on this invention is described.
[0024]
1 to 3 show an embodiment of the invention described in claims 1 to 3 . 1 is a schematic elevation view, FIG. 2 is a plan view taken along line AA in FIG. 1, and FIG. 3 is a plan view taken along line BB in FIG.
[0025]
In this embodiment, “4 units”, that is, four sets of power generation facilities constitute a thermal power plant. 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. This building has 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 installed from the lower layer to the upper layer. Gas turbine chamber 28, first flue chamber 30 where the first flue 29 is installed, exhaust heat recovery boiler chamber 32 where the exhaust heat recovery boiler 31 is fixedly installed, and second flue 33 Each of the installed second flue chambers 34 is composed of a set of “4 units” arranged in a series in the vertical direction.
[0026]
The steam turbine room (and the condenser room) 24 is arranged underground. Large beams 38 are provided at the boundary positions of the floors of each floor, and a mega frame frame type building is firmly constructed. In each of the four sets of power generation facilities, the rotation shafts of the steam turbine 23, the generator 25, and the gas turbine 27 are respectively aligned in the vertical direction. The gas turbine 27 is supplied with fuel such as natural gas from the outside via a fuel supply path (not shown). The flue 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 the outside through a water supply pipe (not shown), and this 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) to rotate the steam turbine. Thus, the generator 25 is rotated by both the gas turbine 27 and the steam turbine 23 to efficiently use the fuel. The steam is then circulated into water at the condenser. The electricity generated by the generator 25 is transmitted to the outside through a transformer.
[0027]
Exhaust gas (smoke) that has passed through the exhaust heat recovery boiler 31 is supplied to the chimney 36 through the flue 33 and released into the high atmosphere. In this embodiment, a single chimney 36 is shared by four sets of exhaust heat recovery boilers 31. Nonetheless, the high components of the steam turbine 23, the generator 25, the gas turbine 27, the first flue 29, the exhaust heat recovery boiler 31, and the second flue 33 are arranged in a series in the vertical direction. The height of the chimney 36 is only about 20 m because it is already 180 m above the ground.
[0028]
Maintenance work of the steam turbine 23 and the gas turbine 27 is performed in each room. As shown in FIG. 2, the plan layout of the building has a large space in the center of the room. Therefore, for example, a work robot 40 is arranged in the approximate center, and four pieces are provided by the work robot 40. The gas turbines 27 are sequentially put in and out of the gas turbine 27 in the vertical arrangement as necessary, and are inspected. Further, a machine room 42 and a maintenance stage 44 are provided on the large beam 38 between the mega pillars 20 and 20.
[0029]
Next, FIGS. 4 to 6 show different embodiments of the invention described in claims 1 to 3 . 4 is a schematic cross-sectional view, and FIG. 5 is a plan view taken along line AA in FIG. FIG. 6 is a plan view taken along line BB in FIG.
The following description will focus on differences from the embodiment of FIGS.
[0030]
In the first embodiment, the steam turbine room (and the condenser room) 24 is provided on the same basement floor. However, in the second embodiment, the condenser room 46 is provided on the lowest floor. The steam turbine chamber 48 is separated and independent on the upper floor, and the condenser chamber 46 is underground.
[0031]
In the exhaust heat recovery boiler chamber 32, the exhaust heat recovery boiler 31 is suspended from the mega beam 22 by the suspension rod 50 to form a suspended seismic isolation structure, and the control damper 52 is disposed near the lower end of the mega damper 20 and the mega beam 22. Is provided against. Since the exhaust heat recovery boilers 31 are suspended, the chimney 36 is provided individually for each exhaust heat recovery boiler 31. As shown in FIG. 5, maintenance work for each turbine is performed by the work robot 40 on each floor.
[0032]
Next, FIGS. 7 to 9 show a third embodiment of the invention described in claims 1 to 3 . 7 is a schematic cross-sectional view, FIG. 8 is a plan view taken along line AA in FIG. 7, and FIG. 9 is a plan view taken along line BB in FIG.
[0033]
The difference from the first and second embodiments described above is that the building structure is a reinforced concrete structure (RC), and the RC wall 60 and the RC floor 62 support the equipment on each floor. A tropical biotobe / hot water pool / observation room 63 is provided on the large beam 61 above the second flue chamber 34 as a local symbiosis facility using exhaust heat.
[0034]
In short, the thermal power plant of the present invention has a construction in which a turbine, a generator, an exhaust heat recovery boiler, and a chimney constituting the “unit” are vertically arranged in a series of vertical arrangements. For example, the land area of the steam turbine room is sufficient, and the land area necessary for the construction of the power plant can be greatly reduced, for example, to about a quarter of the conventional area.
[0035]
Even when building a multi-unit thermal power plant, the site can be greatly reduced. In addition, since the “units” of the turbine, the generator, and the exhaust heat recovery boiler are arranged in a straight line in the vertical direction, the upper end of the exhaust heat recovery boiler 31 is located at a considerable height from the ground. 36 need not be installed, or the chimney length can be significantly reduced, yet the smoke outlet can be at a sufficient ground level. Furthermore, by installing this thermal power plant in a mega frame frame type building composed of mega pillars 20 and mega beams 22, construction costs can be further reduced and maintenance costs can be reduced.
[0036]
【Example】
In each of the above embodiments, the height of the chimney 36 at the tip is about 200 meters, but the actual length of the chimney itself is the height of “one unit” constituting the thermal power plant or supports this. The difference between the ground height at the upper end of the exhaust heat recovery boiler 31 and the 200 meters may be sufficient. In embodiments where the required flue gas height does not have to be very high, a chimney may not be required. When the steam turbine chamber 24 or 48 or the like is submerged underground, the depth is about 20 meters. The planar shape of the turbine chamber has a side length of about 70 meters. The length of one side of the mega pillar 20 having a rectangular cross section is about 10 meters. The site of the “conventional thermal power plant” with an output of 2.8 million kilowatts required about 300 meters × 300 meters, but according to the present invention, the site of the thermal power plant with the same scale power generation capacity is 100 meters × Can be reduced to 140 meters. Therefore, the site area required in the embodiment of the present invention can be reduced to one-sixth to one-fourth of the conventional one, and the land cost can be greatly reduced.
[0037]
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 spirit of the present invention. For example, the configuration in which the units of the power plant are arranged in the order of the steam turbine, the generator, and the gas turbine from the bottom to the top in the vertical direction is shown, but the order of the generator, the steam turbine, and the gas turbine is also shown. Good. However, since the flue gas rises from the bottom to the top, it is important from the viewpoint of energy efficiency to arrange the exhaust heat recovery boiler immediately above the gas turbine. If necessary, a central operation room and a main office building may be provided near the mega pillar.
[0038]
[Effects of the present invention]
According to the first to third aspects of the invention, the “one unit” turbine, the generator, and the exhaust heat recovery boiler constituting the thermal power plant are configured in a vertical configuration in which they are arranged in series in the vertical direction. Therefore, it can be constructed efficiently on a small site area, and the land area can be reduced and the construction cost can be greatly reduced. Therefore, replacement of an aging thermal power plant can be easily performed at low cost.
[0039]
In addition, since the chimney is installed on the exhaust heat recovery boiler, the length of the chimney can be shortened, and if the height to the exhaust heat recovery boiler reaches the height required for exhaust smoke, the chimney is not required. You can also. Furthermore, maintenance costs can be concentrated on each floor, reducing maintenance costs.
[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 taken along line AA in FIG.
FIG. 3 is a plan view taken along line BB in FIG. 1;
FIG. 4 is a schematic side view showing a second embodiment of the thermal power plant of the present invention.
5 is a plan view taken along line AA in FIG. 4. FIG.
6 is a plan view taken along line BB in FIG.
FIG. 7 is a schematic side view showing a third embodiment of the thermal power plant of the present invention.
8 is a plan view taken along line AA in FIG. 7. FIG.
9 is a plan view taken along line BB in FIG. 7. FIG.
FIG. 10 is a plan view of a conventional thermal power plant.
11 is a side view taken along line AA in FIG.
[Explanation of symbols]
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 Large beam 46 Condenser room 48 Steam turbine room

Claims (3)

A steam turbine and a gas turbine, a generator driven by the turbine, an exhaust heat recovery boiler that recovers exhaust heat from the gas turbine and supplies energy to the steam turbine , and a flue vertically A series of combinations arranged in a direction is configured as a set of power generation equipment, and the steam turbine room, generator room, gas turbine room, waste heat recovery boiler room, and flue room are vertically oriented from the lower layer to the upper layer. In the building constructed as a series of arrangements, a plurality of sets of the power generation equipment are arranged side by side in plan view, and the flues constituting the power generation equipment of each set are connected to the upper chimney . Thermal power plant characterized by 2. The thermal power generation according to claim 1, wherein the turbine is composed of a gas turbine and a steam turbine which are installed in series above and below the generator with a vertical rotating shaft interposed therebetween. Where. The thermal power plant according to claim 1, characterized in that flues in a plurality of sets of power generation facilities are connected to a common single chimney.

Images