JP2929842B2 - boiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view of a boiler. A boiler body 1 is suspended from a steel boiler frame 2 using suspension rods 3.

A steam separator 4 and a steam separator drain tank 5 are also suspended from the boiler steel frame 2 by using suspension rods 3. In addition, steam-water separation gas drain tank 5
Is fixed to the boiler steel frame 2 by a support beam 50 so as to be immovable in the horizontal direction as a steady rest during an earthquake.

In FIG. 4, reference numeral 6 denotes a furnace constituting the boiler main body 1, reference numeral 7 denotes a rear heat transfer section connected to the outlet side of the furnace 6, reference numeral 8 denotes a ceiling enclosure formed on the upper portion of the boiler main body 9, Is the front and rear direction of the boiler.

[0005] Further, inside the ceiling enclosure 8, as shown in FIG. 5, a steam separator inlet manifold 10 is suspended from the ceiling enclosure 8 by using a suspension rod 11, and constitutes a furnace front wall 12. The boiler water that has risen inside the heat transfer pipes is connected to the steam-water separator inlet manifold 1 through a connecting pipe 13.
0 and collected at one end of steam-water separator inlet manifold 1
The steam flowing from the other end is sent from the other end to the steam separator 4 via the connecting pipe 14 to be separated by steam, and the steam separated by the steam separator 4 forms the boiler ceiling wall 16 from the connecting pipe 15. The water (boiler water) sent to the heat transfer tube and separated by the steam separator 4 is sent to the steam separator drain tank 5 via the communication pipe 17.

In FIG. 5, reference numeral 18 denotes a boiler elongation base point;
9 is an upper beam of the ceiling enclosure, 20 is a back stay for pressing the outer periphery of the furnace 6, 48 and 49 are headers of the furnace front wall 12 and the boiler ceiling wall 16, and 51 is provided between the boiler steel frame 2 and the upper part of the ceiling enclosure 8. Earthquake received 52, boiler steel frame and furnace 1
It is an earthquake receiver (see FIG. 6) provided between the two sides.

The boiler body 1 is suspended from the boiler steel frame 2 by using the suspension rods 3 so that the boiler body 1 can be supported without any trouble even if the boiler body 1 thermally expands during operation. .

A steam separator 4 and a steam separator drain tank 5 are suspended and supported from a boiler steel frame 2 separately from a boiler main body 1 via a suspending rod 3, and a steam separator Drain tank 5 is provided. 5 is fixed to the boiler steel frame 2 so as to be immovable in the horizontal direction by using the support beam 50, so that they can be supported without being affected by the thermal expansion of the boiler main body 1, and steam-water separation during an earthquake The container drain tank 5 is prevented from interfering with the boiler main body 1.

When the boiler body 1 is displaced due to thermal expansion or during an earthquake, the relative displacement between the boiler body 1 and the steam / water separator 4 or the steam / water separator drain tank 5 is determined by the respective connecting pipes 13. , 14, 15, 17 for a long time, connecting pipe 1
3, 14, 15, and 17 are allowed by giving them great flexibility.

[0010]

However, the above-mentioned conventional boiler has the following problems.

That is, in order to support the steam-water separator 4 and the steam-water separator drain tank 5 so that they cannot be displaced in the horizontal direction without hindrance against displacement of the boiler main body 1 due to thermal expansion, earthquake, or the like. Water separator 4 or steam-water separator drain tank 5
Is suspended from the boiler steel frame 2 separately from the boiler main body 1 by a suspension rod 3, and the steam-water separator drain tank 5 is fixed to the steel frame 2 by using a support beam 50. Since the displacement has been eliminated by giving the connecting pipes 13, 14, 15, 17 large flexibility, the length of each connecting pipe 13, 14, 15, 17 becomes very large, and accordingly, And each connecting pipe 13,1
A large number of supporting devices (not shown) for 4, 15, 17 have been required.

Although the displacement of the boiler body 1 due to the thermal expansion is allowed by the flexibility of the communication pipes 13, 14, 15, and 17, the boiler body 1 is displaced and the communication pipes 13, 14 are displaced. , 15, 17 are inevitably applied directly to the boiler main body 1, and there is a possibility that the weak portion of the boiler main body 1 may be damaged.

In view of the above-mentioned circumstances, the present invention shortens each connecting pipe and uses a boiler body 1 by a reaction force at the time of thermal expansion or earthquake.
It is an object of the present invention to provide a boiler capable of preventing a weak portion of the boiler from being damaged.

[0014]

SUMMARY OF THE INVENTION The present invention relates to a boiler front-rear direction 9 at one end of a steam-water separator inlet manifold 10.
24 corresponds to the extension base point 18 of the boiler body 1.
Is supported on the ceiling enclosure upper beam 19 so as not to be movable in the boiler front-rear direction 9, and other portions of the steam separator inlet manifold 10 are supported on the ceiling enclosure upper beam 19 so as to be movable in the boiler front-rear direction 9, The steam-water separator 4 and the steam-water separator drain tank 5 are suspended from the boiler steel frame 2 and supported by a hanging rod 26, and the steam-water separator drain tank 5 is horizontally moved by a fixing member 40 from the backstay 20 of the furnace 6. The present invention relates to a boiler characterized in that it is immovably supported and connected between them by connecting pipes 45 and 47.

[0015]

According to the present invention, the steam-water separator 4 and the steam-water separator drain tank 5 are suspended and supported from the boiler steel frame 2 by the hanging rod 26, and the steam-water separator drain tank 5 is connected to the furnace 6
Of the boiler main body 1 due to thermal expansion and displacement of the boiler main body 1 during an earthquake, and the steam-water separator 4 and the steam-water separator drain The tank 5 will also be displaced,
Since the relative displacement of the steam separator 4 and the steam separator drain tank 5 with respect to the boiler main body 1 is small, the flexibility of the connecting pipes 45, 46, 47 connecting between them can be reduced.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the present invention.

In the drawings, the same components as those in FIGS. 4 to 6 are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, only the configuration unique to the present invention will be described.

One end of the steam-water separator inlet manifold 10 is immovably supported in the boiler front-rear direction 9 by means of a fixing member 21 on the top wall 19 surrounding the ceiling.

As shown in FIG. 2, the fixed position of one end of the steam-water separator inlet manifold 10 is a straight line 23 extending in the boiler width direction 22 through the extension base point 18 of the boiler body 1 and a steam-water separator inlet manifold 10. (The point in the boiler front-rear direction 9 corresponds to the extension base point 18 of the boiler body 1).

Further, the other end of the steam-water separator inlet manifold 10 is supported on a top wall 19 surrounding the ceiling by a slide member 25 so as to be movable in the front-back direction 9 of the boiler.

The boiler steel frame 2 is supported by the suspension rod 26 at a position substantially at the same height as the ceiling-enclosed upper beam 19 of the steam separator 4 and the steam separator drain tank 5.

The circumferential position of the steam separator 4 is shown in FIG.
2, a straight line 2 passing through the center of the steam separator 4 and connecting the extension base point 18 of the boiler main body 1 and the center of the steam separator 4
Lines 32, 29, 30, 31, which are substantially orthogonal to
Two positions 36, 37, 38 on 33, 34, 35,
39.

As shown in FIG. 2, the supporting position of the steam / water separator drain tank 5 in the circumferential direction passes through the center of the steam / water separator drain tank 5, and extends from the extension base point 18 of the boiler body 1 to the steam / water separation. Two positions 43 on a line 42 that is substantially orthogonal to a straight line 41 connecting the center of the container drain tank 5.

Further, the steam-water separator drain tank 5 is fixed by using a fixing member 40 extended from a back stay 20 for holding the outer periphery of the furnace 6.

In this state, a connecting pipe 44 extends between the upper end of the boiler ceiling wall 16 and one end of the steam-water separator inlet manifold 10.
And the other end of the steam-water separator inlet manifold 10 and the steam-water separator 4 are connected by a connecting pipe 45.
And the boiler ceiling wall 16 are connected by a communication pipe 46, and the communication pipe 4 is connected between the steam separator 4 and the steam separator drain tank 5.
Connect with 7.

Next, the operation will be described.

The process of allowing the boiler main body 1 to be displaced by thermal expansion by suspending the boiler main body 1 from the boiler steel frame 2 by the hanging rod 3 and the flow paths of boiler water and steam are the same as those in FIGS. Therefore, the description is omitted.

In the present invention, first, the position of the steam-water separator 4 and the position substantially equal to the height of the ceiling-enclosed upper beam 19 of the steam-water separator drain tank 5 are suspended from the boiler steel frame 2 by suspension rods 26, respectively. In addition, since the steam separator drain tank 5 is supported by the back stay 20 using the fixing member 40, the steam separator 4 and the steam separator drain tank 5 are displaced by the thermal expansion and the earthquake. Will be displaced according to.

As a result, the relative displacement of the steam separator 4 and the steam separator drain tank 5 with respect to the boiler body 1 is reduced, and the connecting pipes 45, 46,
47 is less flexible.

The above will be described in more detail. First, a point (intersection 24) at one end of the steam-water separator inlet manifold 10 where the position in the boiler front-rear direction 9 corresponds to the extension base point 18 of the boiler main body 1 is defined as an upper surface of the ceiling enclosure. Fixing member 2 for beam 19
1 and the other end of the steam-water separator inlet manifold 10 is ceiling-enclosed with a top beam 1
9 is supported by a slide member 25 so as to be movable in the boiler front-rear direction 9 so that the extension base point 1
8 and the elongation of each part of the boiler centered on the elongation base point 18.

That is, the elongation of each part of the boiler main body 1 centering on the elongation base point 18 is determined by the steam-water separator inlet manifold 10.
(Elongation of the corresponding portion of the steam-water separator inlet manifold 10 can be regarded as substantially equal to that of the corresponding portion).

The extension of the connecting pipe 44 connecting the steam-water separator inlet manifold 10 and the furnace front wall 12 and the fixing member 21 of the steam-water separator inlet manifold 10 to the furnace front wall 1
Since it can be seen that the elongation up to the portion corresponding to No. 2 is almost equal, the flexibility of the connecting pipes 44, 45, 46 is reduced by the small expansion difference between the two and the connecting pipes 44, 45 The length of 45 and 46 can be shortened.

Similarly, the steam separator 4 and the boiler ceiling wall 16
And the extension between the corresponding portions of the steam-water separator inlet manifold 10 can be regarded as substantially equal to each other. The flexibility of the pipe 46 can be reduced, and the length of the connecting pipe 46 can be shortened.

Further, the steam-water separator drain tank 5 is fixed by a fixing member 40 protruding from the back stay 20 so that the front wall 1 of the furnace can be cooled.
2, the steam-water separator drain tank 5 is also displaced in accordance with the displacement of the boiler main body 1 due to thermal expansion, but between the steam-water separator 4 and the steam-water separator drain tank 5 Can be regarded as substantially equal to the extension between the corresponding portions of the fixing member 40, and the flexibility of the communication tube 47 is reduced by the small displacement difference between them. Thus, the length of the connecting pipe 47 can be shortened.

Also, by reducing the displacement difference of each part, the communication pipes 44,
Since the amount of deformation of 45, 46, 47 can be reduced, it is possible to eliminate the possibility of damaging a weak portion of the boiler body 1 due to the reaction force of the deformation of the connecting pipes 44, 45, 46, 47. .

Further, as shown in FIG. 2, the steam-water separator 4 passes through the center of the steam-water separator 4 and extends from the extension base point 1 of the boiler body 1.
Lines 28, 29, 3 connecting the center of the steam-water separator 4
0, 31 are substantially orthogonal lines 32, 33, 34,
35, the steam-water separator drain tank 5 passes through the center of the steam-water separator drain tank 5, extends the base point 18 of the boiler body 1 and the steam-water separator. By supporting at two positions 43 on a line 42 substantially orthogonal to a straight line 41 connecting the center of the drain tank 5, the steam-water separator 4 and the steam-water separator The container drain tank 5 is extended.

Therefore, during the earthquake, the seismic load due to the swing of the steam separator 4 and the steam separator drain tank 5 is reduced by the connecting pipe 44,
It is transmitted to the steam-water separator inlet manifold 10 via 45 and 46, transmitted from the fixing member 21 to the ceiling enclosure upper beam 19, and transmitted to the boiler steel frame 2 by the seismic receiver 51 provided on the ceiling enclosure upper beam 8. .

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention.

[0040]

As described above, according to the boiler of the present invention, each connecting pipe can be shortened, and a weak portion of the boiler body 1 is damaged by thermal expansion or a reaction force at the time of an earthquake. This can provide an excellent effect that can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view of one embodiment of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a schematic overall side view of a conventional boiler.

FIG. 5 is an enlarged view of a ceiling enclosure of the boiler of FIG. 4;

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boiler main body 4 Steam separator 5 Steam separator drain tank 6 Furnace 9 Boiler front-back direction 10 Steam separator inlet manifold 18 Extension base point 19 Ceiling enclosure upper surface beam 20 Back stay 24 Intersection 26 Suspension rod 40 Fixing member 45, 47 Connecting pipe

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F22B 37/24

Claims (1)

(57) [Claims] 1. A point 24 at one end of the steam-water separator inlet manifold 10 corresponding to the extension base point 18 of the boiler main body 1 at a position 24 in the boiler front-rear direction 9 cannot be moved in the boiler front-rear direction 9 by a ceiling-enclosed upper surface beam 19. And the other part of the steam-water separator inlet manifold 10 is covered with a ceiling top beam 1
9, the steam-water separator 4 and the steam-water separator drain tank 5 are suspended from the boiler steel frame 2 by hanging rods 26, and are supported by the steam-water separator 4 and the steam-water separator drain tank 5. A boiler which is supported from the back stay 20 of the furnace 6 by a fixing member 40 so as not to be able to move in the horizontal direction, and is connected between them by connecting pipes 45 and 47.