JP2908084B2 - Split type steam silencer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a steam silencer mounted on a safety valve of a boiler for thermal power generation or a steam turbine.

[0002]

2. Description of the Related Art A steam silencer for preventing noise generated when a safety valve of a boiler is opened is attached to an upper portion of a boiler for thermal power generation. Such a conventional silencer for steam usually has a wool-based sound absorber attached to the inside of a steel casing having a diameter of about 2 m and a height of about 5 m. There is a drawback that the sound absorbing body of the system is wet and deteriorates, and the sound absorbing properties are reduced within a short period of time.

A boiler for thermal power generation has a height of 50.
Because it is up to 60 m, the installation of a large-sized steam silencer and the replacement of a deteriorated silencer as described above require a large-sized crane and must be moved horizontally on the boiler ceiling surface. There was a drawback that the construction cost was extremely expensive.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, so that the sound absorbing performance is not deteriorated even if it comes into contact with steam for a long period of time, and the mounting and replacement work is performed more than before. It is an object of the present invention to provide a steam silencer which can be performed extremely easily.

[0005]

Means for Solving the Problems The above problem is solved by a plurality of sheets.
Hollow composed of combined casing side plates
A diffuser that distributes the flow of introduced steam in the casing
And a diffuser unit incorporating the Za, the de
Multiple hollow casings with the same diameter as the diffuser unit
Combine the casing side plates divided into
A plurality of girder members having a sound absorbing panel fitting portion formed at predetermined intervals are passed to the bottom of the hollow casing, and a plurality of sound absorbing panels whose lower ends are formed in a shape corresponding to the fitting portion are passed through the casing. It has a silencer unit that is housed vertically inside and fixed at the top with another girder material ,
In multiple stages Size Lee Streptococcus over this unit will be in the height direction, the de
The problem can be solved by a split-type steam silencer characterized by being laminated on a diffuser unit . Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

[0006]

DETAILED DESCRIPTION FIG. 1 shows the overall division type silencer steam embodiment, the diameter size that is divided in the height direction
Consists of six units. 1 is four silencer units, 2 is a 2nd diffuser unit, 3 is a 1st diffuser unit. Each unit has a height of 600
It is about 750 mm , divided into units and can be lifted up to the top of a boiler or the like by an elevator.

The silencer unit 1 comprises a hollow casing 4 and a plurality of ceramic sound absorbing panels 5 installed inside the casing. For convenience of transportation by an elevator, the casing 4 can be divided into a plurality of casing side plates in the lateral direction as shown in FIG.
In the embodiment, a cylindrical casing 4 can be formed by combining the casing side plates 6 divided into four pieces.

[0008] A plurality of girder members 7 are provided at the bottom of the casing 4 thus constructed.
Are formed at predetermined intervals with fitting portions 8 of the sound absorbing panel. The lower end of the sound absorbing panel is formed in a shape corresponding to the fitting portion 8 of the beam member 7.

In the embodiment shown in FIG. 3, V
A letter-shaped fitting portion 8 is formed, and the lower end of the sound absorbing panel 5 is sharpened corresponding to the fitting portion 8 of the beam member 7. FIG.
In this embodiment, a U-shaped fitting is welded to the girder member 7 at a predetermined interval to form a fitting portion 8, and the lower end of the sound absorbing panel 5 is fitted to the inside of the fitting portion 8 of the girder member 7. And Then, these sound absorbing panels 5 are vertically lowered from the upper part of the casing 4 into the inside of the casing 4, and the lower end is stabilized by fitting the projecting portion of the lower end into the concave portion 8 of the beam member 7 as shown in FIGS. The sound absorbing panel 5 is fixed inside the casing 4 by fixing the protruding piece 9 formed on the upper surface of the sound absorbing panel 5 with another girder member 10 on the upper part of the casing 4 as shown in FIG.

The sound absorbing panel 5 has a structure in which a porous ceramic sound absorbing plate is attached to both side surfaces of a metal hollow frame in the embodiment of FIG. 3, and a metal hollow frame in the embodiment of FIG. The sound absorbing material made of fiber is filled, and metal perforated plates are attached to both sides of the frame. Silencers for flash tanks with high steam inflow frequency
For a silencer for a blow tank or a silencer in which rainwater enters from a silencer outlet, it is preferable to select a ceramic sound absorbing plate that does not deteriorate against steam or rainwater.

In the present invention, since the silencer unit 1 is configured as described above, the sound absorbing panel 5 can be fixed only from above the casing 4 without entering the inside of the casing 4.

FIG. 5 shows the same diameter as the silencer unit 1 .
FIG. 4 shows a second diffuser unit 2 having a size similar to that of the silencer unit 1 described above in that the casing 4 is constituted by a casing side plate 6 divided into a plurality of sheets. The difference is that a second diffuser 12 is provided inside. This second diffuser 12 also considers transportation convenience,
It is preferable to those which can be divided into a plurality as shown in FIG.

FIG. 6 shows a first diffuser unit 3 having the same diameter as the second diffuser unit 2 constituted by a casing side plate 6 divided into a plurality of sheets.
A first diffuser 14 having a large number of steam ejection holes 13 is attached to the center of the casing 4 of the loudspeaker. Also 15
Is a base for introducing steam into the first diffuser 14.

[0014]

The split-type steam silencer of the present invention constructed as described above is such that each unit can be divided and carried by a lift to the upper part of the boiler. After being transported, first, the casing 4 of the first diffuser 3 is assembled and fixed at a predetermined position on the top of the boiler. And the first
The diffuser 3 is installed and fixed inside. Next, the upper casing 1 for the first stage is assembled on the lower casing 4 to incorporate the internal members. This is repeated to sequentially stack.

In assembling the silencer unit 1,
First, the casing 4 is assembled on the casing 4 of the second diffuser 2. Then, a plurality of sound absorbing panels 5 are vertically inserted into the inside of the casing 4 from above, and the lower ends thereof are fitted to fitting portions 8 formed at predetermined intervals on the plurality of beam members 7 at the bottom of the casing 4. In addition, sound absorbing panel 5
Is fixed by another girder member 10 to form the silencer unit 1. Thus, the silencer unit 1
Can be assembled only from the upper side without entering the casing 4. Further, since the divided members can be individually incorporated, it is possible to assemble with a small lifting device.

As described above, the split-type steam silencer of the present invention is different from the conventional integrated-type steam silencer, and is different from the diffuser unit and the silencer unit.
Are also of the same diameter and are divided for each of these units .
And since the casing can be divided into side plates and transported by elevator, there is no need to use a large crane,
Also, there is no need to construct a scaffold for transporting the boiler on the ceiling in the horizontal direction, and a small lifting device on the roof of the boiler is possible. Moreover, since the split-type silencer for steam of the present invention is formed by stacking the silencer units 1 in which the ceramic sound absorbing panels 5 are vertically accommodated in the casing 4 in multiple stages, the steam discharged from the boiler, the steam turbine, or the like. Of course, when a porous ceramic sound-absorbing plate is attached to the sound-absorbing panel 5, the ceramic sound-absorbing panel 5 does not deteriorate even if it comes into contact with steam for many years. There is an advantage that it can be maintenance-free.

[0017]

Split vapor silencer of the present invention as described in detail above, according to the present invention is a diffusion Yuzayunitto
By dividing into each unit constituent member including, it becomes possible to carry by elevator, and since the divided members can be individually incorporated,
It is possible to assemble with a small lifting device, and it is possible to perform mounting and replacement work much easier, cheaper and safer than before. Therefore, the present invention greatly contributes to industrial development as a split-type steam silencer that has eliminated the conventional disadvantages.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a silencer unit.

FIG. 3 is a cross-sectional view illustrating a support structure of a sound absorbing panel at a bottom portion of the silencer unit.

FIG. 4 is a sectional view showing another supporting structure of the sound absorbing panel at the bottom of the silencer unit.

FIG. 5 is an exploded perspective view of a second diffuser unit.

FIG. 6 is an exploded perspective view of a first diffuser unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Silencer unit 4 Casing 5 Sound absorption panel 6 Casing side plate 7 Girder material 8 Fitting part 10 Girder material

Continuation of the front page (56) References JP-A-52-25901 (JP, A) JP-A-2-95713 (JP, A) JP-A-2-119917 (JP, A) JP-A-2-185610 (JP) , A) Fully open 1986-73997 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F22B 37/02 F01B 31/16 F01N 1/24

Claims (3)

(57) [Claims] A casing side plate divided into a plurality of sheets is assembled.
The flow of the introduced steam is
Diffuser with diffuser for dispersing
And Heather unit, having the same diameter as the diffuser unit
Casing side plate divided into multiple hollow casings
Constitute in combination, of the hollow casing at the bottom passes the plurality of beam members that mating portion of the acoustical panels are formed at predetermined intervals, a plurality of sheets of the shape to correspond to the fitting portion of the lower end a siren <br/> Sir units constructed by fixing the upper portion of another spar after accommodating vertically sound absorbing panels in the interior of the casing, the multistage Size Lee Streptococcus over units of this in the height direction, A split-type steam silencer, which is laminated on the diffuser unit . 2. The split type steam silencer according to claim 1, wherein the sound absorbing panel is formed by attaching a porous ceramic sound absorbing plate to both sides of a metal hollow frame. 3. The split type sound absorbing panel according to claim 1, wherein the sound absorbing panel is formed by filling a metal hollow frame with a fiber sound absorbing material and attaching metal perforated plates to both sides of the frame. Silencer for steam.