JPS60134104A - Supporter for waste heat recovery boiler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a support device for an exhaust heat recovery boiler that has excellent earthquake resistance and is more compact.

[Technical background of the invention]

In general, power generation plants are increasingly using so-called combined cycle power generation, which combines the advantages of steam turbines and gas turbines, in consideration of fuel savings and efficient operation during frequently repeated startups and shutdowns.

Conventionally, in a combined cycle power plant, as shown in Fig. 1, the exhaust gas that has finished its work in the gas turbine (1) is heated to approximately 500 to 600°C and is sent through a duct to the waste heat boiler (3). Heat is exchanged with the water naturally falling from the steam drum (9) through the heat transfer tube (6) of the evaporator (4).

Furthermore, the exhaust gas exchanges heat with water in the economizer (5) and is eventually discharged to the outside through the outlet duct (7).

On the other hand, the steam generated from the steam drum (9) is transferred to the pipe (9a
) is sent to the steam turbine Ql, where it performs work and then condenses in the condenser (1). The condensed water is sent through a pump (8) to an economizer (5) where it is sent, still partially moist, to a steam drum (9).

The steam is then sent to the heat exchanger tube (6) of the evaporator to re-evaporate the moisture, and is then sent to the steam turbine Ql as steam.

[Problems with background technology]

By the way, the waste heat boiler (3) is a gas turbine (1).
) Since the temperature of the exhaust gas sent from the boiler is relatively low, the boiler must be made larger in order to secure enough heat to match the output of the steam turbine, which means that the frame that supports the boiler itself becomes larger. .

Conventionally, as shown in Figs. 2 to 4, a frame supporting a boiler consists of a boiler body (38) having a rectangular cross section and extending longitudinally, and a vertical support (I2, an upper longitudinal frame (12g)).
, upper end execution frame (tzb), middle longitudinal frame (12a),
Intermediate depth frame (Support frame incorporated into the parallel girder by I31)
121, and this support frame a'a has heat insulation,
The entire circumference is covered with a shielding plate <14+ which also serves as soundproofing.

However, although the frame with the above configuration can sufficiently withstand earthquakes when the waste heat boiler is relatively small,
As waste heat boiler containers become extremely large, the structures must be made stronger for agricultural reasons and wind pressure reasons.As a result, the structures themselves become extremely large and require a lot of time to assemble. However, there are also various bottlenecks, such as the preparation of maintenance work due to long-term use.

[Purpose of the invention]

Therefore, in view of the above-mentioned circumstances, it is an object of the present invention to provide a support device for an exhaust heat recovery boiler that reduces the size of the structure itself and is sufficiently resistant to earthquakes and wind pressure.

[Summary of the invention]

In order to achieve the above object, the present invention provides a support device for an exhaust heat recovery boiler having a support frame in which the circumferential wall of a boiler body having a rectangular cross section and extending vertically is incorporated into the double cross section. Among the support frames, an auxiliary beam is installed parallel to the intermediate depth frame and passes through the boiler shell. It is characterized by being stretched so as to

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

5 to 11 show a support device for an exhaust heat recovery boiler according to the present invention, in which the support frame α has a vertical support (1
2a), (12b), (12c), (12
d) , (12e), and (12f), and these columns are incorporated into the parallel girder and firmly connected to the upper end support frame and the middle support frame, respectively. That is,
The upper end support frame is composed of upper end longitudinal frames (14a), (14c) and upper end depth frames (14d), (14f),
In addition, the intermediate support frame is an intermediate longitudinal frame (13b), (13
e) and the intermediate depth frame (13a), (13c) and (2).However, as shown in FIG. , (13g), and these first auxiliary beams (13f), (13
g) is stretched parallel to the intermediate depth frames (13a) and (13c), and extends through the boiler barrel (3a).

FIG. 6 shows another embodiment of the present invention, which differs from the first embodiment in that there is a second auxiliary beam (13f) and a second support beam (13g) parallel to the center of the intermediate support frame. Auxiliary beam (13
h), and a third auxiliary beam (14g)' is also provided within the support frame at the upper end.

The second auxiliary beam (13h) passes through the boiler shell (3a), as shown in FIGS. 7 and 9.

In this way, if the boiler trunk (3a) is penetrated by the auxiliary beam, the conventional support device can be applied as is, and even if this type of container becomes extremely large, there is no need to provide an unnecessarily strong structure.

〔Effect of the invention〕

As explained above, according to the present invention, the intermediate support frame (
= An auxiliary beam is provided, and an auxiliary beam is also provided on the upper support frame,
Since these auxiliary beams are installed to extend through the boiler body, this type of support device can be made more compact, and there is no need to select strong support members, so that external forces such as earthquakes and wind pressure can (It also has the effect of being able to sufficiently resist the second one.

[Brief explanation of drawings]

Figure 1 is a schematic system diagram showing a general combined cycle, Figure 2 is a diagram showing a support device for a conventional exhaust heat recovery boiler, and Figure 3 is a diagram cut in the direction of arrow I-1 in Figure 2. , 4th
The figure is a view in the direction of arrow IV-1T in FIG. 2, FIG. 5 is a schematic diagram showing a support device for an exhaust heat recovery boiler of the present invention, and FIG. Fig. 7 is a side view showing the support device for the exhaust heat recovery boiler of the present invention, Fig. 8 is a view cut in the direction of the -11 arrow in Fig. 7, and Fig. 9 is a side view showing the support device for the exhaust heat recovery boiler of the present invention.
(2) A view in the direction of arrows, and FIG. 10 is an enlarged plan view of section E in FIG. 7. Agent/patent attorney Kensuke Chika (and 1 other person) (J %
1

Claims (1)

[Claims] In a support device for an exhaust heat recovery boiler having a support frame built into a parallel cross section which is a circumferential wall of a boiler body that has a rectangular cross section and extends long in the vertical direction, of the support frame incorporated into the parallel cross section,
An auxiliary beam is installed parallel to the intermediate depth frame and passes through the boiler body, and an auxiliary beam provided parallel to the depth frame at the upper end of the support frame is also installed so as to pass through the boiler body. Features: Support device for exhaust heat recovery boiler.