JPS6237215B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact packaged regenerative cycle gas turbine.

Conventionally, various devices constituting a regenerative cycle gas turbine apparatus are generally arranged in a straight line as shown in FIG.

Driven equipment 4 such as a turbine 2, an air compressor 3, and a generator are mounted on a sturdy foundation 1 on the ground.
The regenerator 5 is supported floating from the GL and is provided on an axial extension of the turbine. The planar arrangement of this device is as shown in FIG. 2, and a combustor 6 is provided near the turbine 2. The compressed air sent out from the air compressor 3 is sent to the regenerator 5 via a combustion air discharge pipe 7, where it is preheated, and then supplied to the combustor 6 via a combustion air return pipe 8. 9 is a waste heat recovery boiler.

The conventional method of installing a regenerative cycle gas turbine as described above is that a large and sturdy turbine can be used, that the force due to thermal displacement can be absorbed by the turbine, and that the turbine, air compressor, combustor, It has the advantage of being easy to inspect and maintain the regenerator, etc. However, on the other hand, if you arrange the equipment as mentioned above and try to accommodate it within the building, it will require a large building. There must be. Figure 1,
The example shown in FIG. 2 also has a large building 10, but the regenerator is exposed outdoors.

This method of installing a regenerative cycle gas turbine, which requires a sturdy foundation and a spacious building, requires huge construction costs, and the fixed equipment costs and operating costs required for noise prevention and air conditioning are high. Moreover, after these various devices are manufactured at the manufacturer's factory, the cost of transporting them to the user's work site and the cost of installation work are large.

The present invention has been made in view of the above circumstances, and provides a compact packaged gas turbine for outdoor installation that can be installed on a simple foundation, thereby reducing building construction costs, shortening the construction period, and reducing installation time. It contributes to a reduction in area and makes transportation and installation easier.
The purpose is also to facilitate relocation if necessary.

In order to achieve the above object, the present invention is characterized in that the combustor and the regenerator are provided horizontally and at right angles to the turbine axis.

Next, one embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a plan view, and FIG. 4 is a front view.

The turbine main body 11 is installed on a turbine base 12, and includes a compressor casing 13, a turbine casing 14,
It is a rotating equipment part consisting of a turbine intermediate casing 15, their built-in members, and an intake plenum 16, and a turbine enclosure 17 is provided surrounding them.

Combustor outer cylinder 18 forming the casing of the combustor
is attached to the turbine intermediate casing 15 so as to be perpendicular to the axial direction of the gas turbine main body 11, projects horizontally from the turbine enclosure 17, and has its top covered by a mirror plate 19.

A vertical section including the centerline of the combustor is shown in FIG. A combustor enclosure 20 having a shape surrounding the combustor outer cylinder 18 is a turbine enclosure 17.
The opening 21 is provided at the top of the opening 21. Among the accessory members of the combustor, a flame detector etc. (not shown) that are sensitive to high heat is provided near the end plate 19 and is connected to the opening 2.
facing 1.

The horizontal regenerator 22 is connected to the turbine exhaust port 23 such that its flow direction is perpendicular to the turbine body 11 . In this way,
Both the combustor 18 and the regenerator 22 are arranged horizontally with respect to the turbine body 11 and at right angles to the turbine body.

A combustion air discharge pipe 24 and a combustion air return pipe are interposed and connected between the combustor outer cylinder 18 and the regenerator 22 in the following manner (see FIG. 4).

The combustion air discharge pipe 24 has an inverted U shape, and includes a vertical portion 24a connected to the regenerator 22, a vertical portion 24b connected to the combustor outer cylinder 18, and a horizontal portion 24c connecting both of the vertical portions. There is. Horizontal part 2
Gimbaled bellows expansion joints 26, 26 are provided as expansion joints at locations near both ends of 4c, and a hinged bellows expansion joint 27 is provided as an expansion joint in the vertical portion 24b. The combustion air discharge pipe 24 is thus arranged in a vertical plane in the form of a U-shaped vent with three expansion joints. The vertical portion 24b communicates with an air compressor (not shown) of the turbine body 11 via a combustion air discharge passage (not shown) provided in the combustor outer cylinder 18.

The combustion air return pipe 25 is connected to the combustion air discharge pipe 2 described above.
4, it has a U-shaped vent shape with two gimbaled bellows expansion joints 28, 28 and one hinged bellows expansion joint 29, and the connection between the regenerator 22 and the combustor outer cylinder 18 An intervening connection is made between the two. The combustion air discharge pipe 24 and the combustion air return pipe 25 are supported at appropriate locations by spring hangers or oil snubbers (none of which are shown).

Then, an exterior made of rectangular corrugated thin steel plate is provided so as to cover the equipment disposed outside the turbine enclosure 17, that is, the combustor 18, the regenerator 22, the combustion air discharge pipe 24, and the combustion air return pipe 25. 30
is provided. This sheath 30 is attached to the side wall of the turbine enclosure 17 and encloses the combustor enclosure 20.

In this embodiment, the turbine enclosure 1
An extrusion type ventilation fan 33 is provided on the ceiling of the room 7.

31 is a gas turbine output shaft, and 32 is a device driven by the gas turbine.

Arrows A, B, C, D, and E indicate the direction of gas flow, where arrow A is intake air flow, arrow B is compressed air flow, arrow C is preheating air flow, arrow D is exhaust gas flow, and arrow E is ventilation. It's an air current.

This embodiment has the above configuration, and the regenerator 2
2 and the combustor 18 are provided perpendicularly and horizontally to the turbine main body 11, so that the entire turbine plant is compactly integrated and can be easily installed on a flat base with a narrow area. As a result, the foundation work for the turbine plant equipment is simple, the construction cost is low, and the construction period is short. Furthermore, it is easy to transport from the manufacturer's factory to the user's installation site.

Furthermore, in this embodiment, the main body 11 of the gas turbine is surrounded by the turbine enclosure 17, and the combustor protruding from this is surrounded by the removable combustor enclosure 20, so that the turbine main body is attached to the turbine enclosure. This provides the necessary protection, and for combustors with short maintenance intervals, inspection and maintenance can be easily performed by removing the combustor enclosure.

Further, in this embodiment, the turbine enclosure 17
Since all of the accessory equipment that is not enclosed by the enclosure is enclosed by the exterior enclosure 30, there is no need for a special building. Once installed on the foundation, operation can begin immediately. Therefore, it is also easy to relocate this set of plant equipment if necessary.

Further, in this embodiment, the combustor enclosure 20
Since the opening 21 is provided at the top of the turbine enclosure 17, when the extrusion type ventilation fan 33 provided at the top of the turbine enclosure 17 is operated, atmospheric air is sucked through the opening. Members with low heat resistance can be effectively ventilated and cooled, and members attached near the mirror plate 19 can be easily inspected and maintained through the opening 21.

Furthermore, in this embodiment, the overall shape of the combustion air discharge pipe 24 and the return pipe 25 are each U-shaped bent, and each is provided with three expansion joints and a spring support or oil snubber. There is no risk of damage due to thermal stress or vibration. Since the entire U-shaped tube is disposed within a vertical plane, the bending stress applied to the attachment portion is significantly reduced.

As explained above, the present invention provides a regenerative cycle gas turbine in which a combustor is provided in a horizontal direction perpendicular to the gas turbine axis, and the flow direction of exhaust gas is in a horizontal direction perpendicular to the gas turbine axis. By providing a horizontal regenerator, a regeneration cycle gas turbine plant can be made more compact. Especially when applied to a packaged gas turbine for outdoor installation, transportation and installation costs, foundation work, etc. can be reduced, and the construction period can be reduced. can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional regenerative cycle gas turbine, FIG. 2 is a plan view, FIG. 3 is a plan view of an embodiment of the present invention, FIG. 4 is a front view, and FIG.
The figure is a vertical sectional view including the centerline of the combustor in the embodiment shown in FIG. 4. 11... Turbine main body, 17... Turbine enclosure, 18... Combustor, 19... End plate,
20... Combustor enclosure, 21... Opening, 22... Regenerator, 23... Turbine exhaust port,
24... Combustion air discharge pipe, 25... Combustion air return pipe, 26, 28... Bellows expansion joint with gimbal, 27, 29... Bellows expansion joint with hinge,
30...Exterior.

Claims (1)

[Claims] 1. In a regeneration cycle gas turbine, the combustor is installed horizontally and at right angles to the gas turbine axis, and the regenerator is installed so that the exhaust gas flow direction of the regenerator is horizontal and at right angles to the gas turbine axis. A package type regenerative cycle gas turbine characterized by being provided with. 2. A main body consisting of a rotating equipment portion of the gas turbine is surrounded by a turbine enclosure, and a combustor enclosure surrounding a combustor protruding from the turbine enclosure is detachably attached to the turbine enclosure. A packaged regenerative cycle gas turbine according to claim 1, characterized in that: 3. The packaged regenerative cycle gas turbine according to claim 2, further comprising an exterior that surrounds gas turbine accessories disposed outside the turbine enclosure. 4. The packaged regenerative cycle gas turbine according to claim 2 or 3, wherein the combustor enclosure has an opening at a location facing the top of the combustor. 5. A combustion air discharge pipe and a combustion air return pipe are provided between the combustor and the regenerator, and each of the combustion air discharge pipe and the combustion air return pipe has a vertical U-shaped bent shape, and each A packaged regenerative cycle gas turbine according to claim 1, characterized in that it is provided with three expansion joints and is provided with a spring support or an oil snubber.