JPH0518505A - Split type silencer for steam - Google Patents

Abstract

PURPOSE:To obtain a large silencer for steam for a boiler or the like for thermal power generation by making mounting and exchanging work easier to be performed than ever. CONSTITUTION:Both ends of a plurality of sound absorbing panels 5 are fitted into a sound absorbing panel mounting section formed on a side wall of a hollow casing to form a silencer unit 1. The silencer unit 1 thus obtained is laminated in layers in height. The silencer thus arranged can be disassembled to be carried onto a boiler thereby achieving a simplification of the assembling.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A steam silencer is attached to the upper part of a boiler for thermal power generation in order to prevent noise generated when a safety valve of the boiler is opened. Such a conventional steam silencer is usually made of a steel casing having a diameter of about 2 m and a height of about 5 m and a wool sound absorber attached inside the casing. There is a drawback that the sound absorbing body of the system deteriorates due to wetting, and the sound absorbing property deteriorates in a short period of time.

The height of a boiler for thermal power generation is 50
Since the length is up to 60 m, a large crane is required to install the large-scale steam silencer and the replacement work of the deteriorated silencer as described above, and in order to move the boiler horizontally on the ceiling surface of the boiler. It was also necessary to build a scaffold, and the construction cost was extremely expensive.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art so that the sound absorbing performance does not deteriorate even if it comes into contact with steam for a long period of time, and the installation and replacement work is performed more than before. The purpose of the present invention is to provide a silencer for steam that can be performed extremely easily.

[0005]

[Means for Solving the Problems] The above problem is to form sound absorbing panel mounting portions on a side wall of a hollow casing at predetermined intervals and to fit both ends of a plurality of sound absorbing panels to these sound absorbing panel mounting portions. Therefore, the present invention can be solved by a split-type steam silencer, which is vertically housed inside a casing to form a silencer unit, and such silencer units are stacked in multiple layers in the height direction. Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 shows the whole of the split type steam silencer of the embodiment, which is composed of six units divided in the height direction. 1 is 4 silencer units, 2
Is a second diffuser unit, and 3 is a first diffuser unit. The height of each unit is about 600 to 750 mm, and it can be divided and carried to the upper part of the boiler etc. by an elevator.

The silencer unit 1 comprises a hollow casing 4 and a plurality of ceramic sound absorbing panels 5 installed therein. It is preferable that the casing 4 can be divided into a plurality of sheets in the lateral direction as shown in FIG. 2 so as to be convenient for transportation by an elevator. In the embodiment, the side plate 6 divided into four pieces is combined to form the cylindrical casing 4.

On the side wall of the casing 4 thus constructed, sound absorbing panel mounting portions 7 are formed at predetermined intervals. In the embodiment, these sound absorbing panel mounting portions 7 are formed by welding a metal plate having a predetermined width to the inner surface of the side plate 6 so as to match the shape of the side end surface of the sound absorbing panel 5, as shown in FIG.

In the embodiment shown in FIG. 3, the sound absorbing panel 5 is a hollow frame made of metal with porous ceramic sound absorbing plates attached to both sides thereof, and the lower end thereof is sharpened. 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 both ends thereof are fitted into these sound absorbing panel mounting portions 7 so that they are housed vertically inside the casing. Further, as shown in FIG. 3, the upper part of the sound absorbing panel 5 is connected to the welding nut 8 on the upper part of the sound absorbing panel mounting portion 7.
It is preferable to fix the sound absorbing panel 5 with the bolts 9 so that the sound absorbing panel 5 does not vibrate inside the sound absorbing panel mounting portion 7.

In the embodiment shown in FIG. 4, the sound absorbing panel 5 has a structure in which a metal hollow frame is filled with a sound absorbing material made of fiber, and metal perforated plates are attached to both side surfaces of the frame. In addition, the silencer for the flash tank, the silencer for the blow tank, and the silencer with the shape that rainwater enters from the silencer outlet part, where steam inflows frequently
It is preferable to select a ceramic sound absorbing plate that does not deteriorate with respect to steam and rainwater.

In the present invention, since the silencer unit 1 is constructed as described above, the sound absorbing panel 5 can be fixed only from the upper side of the casing 4 without entering the inside of the casing 4. Further, by sharpening the lower end of the sound absorbing panel 5 as in the embodiment, it is possible to reduce the flow resistance when the steam flows upward from the lower side and to reduce the pressure loss.

FIG. 5 shows the second diffuser unit 2, which is similar to the silencer unit 1 described above in that the casing 4 is composed of a plurality of side plates 6 which are divided into a plurality of sheets. The difference is that a second diffuser 12 having a slit 11 is incorporated inside. This second diffuser 12 also considers the convenience of transportation,
It is preferable that it can be divided into a plurality as shown in FIG.

FIG. 6 shows the first diffuser unit 3. The first diffuser unit 3 is provided with a large number of steam ejection holes 13 at the center of a casing 4 constituted by a plurality of side plates 6.
The diffuser 14 is attached. 15 is the first
A mouthpiece for introducing steam into the diffuser 14.

[0014]

The split-type steam silencer of the present invention having the above-described structure is one in which each unit is divided and can be carried up to the upper part of the boiler by the elevator. After transporting, 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 built in and fixed. Next, the casing 4 for one stage located on the upper side is assembled on the casing 4 for the lower stage to incorporate the internal members. This process is repeated to stack in sequence.

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 the upper side, and both ends thereof are fitted to the sound absorbing panel mounting portions 7 formed on the side walls of the casing 4, and the sound absorbing panel 5 The silencer unit 1 is constructed by fixing the upper portion with, for example, bolts 9. As described above, the silencer unit 1 can be assembled only by the work from the upper side without entering the inside of the casing 4. Further, since the divided members can be individually incorporated, it is possible to assemble with a slight lifting device.

As described above, unlike the conventional integrated steam silencer of the present invention, the split type vapor silencer of the present invention can be divided into units and can be conveyed by an elevator, so that it is not necessary to use a large crane. Moreover, it is not necessary to form a scaffold for horizontally transporting on the ceiling of the boiler, and the hoisting device on the roof of the boiler can be light. In addition, the split type silencer for steam of the present invention uses the sound absorbing panel mounting portion 7 to vertically stack the sound absorbing panel 5 inside the casing 4 so that the silencer unit 1 is stacked in multiple stages. It is extremely easy and can effectively reduce the noise of steam discharged from boilers, steam turbines, etc., and when a porous ceramic sound absorbing plate is attached to the sound absorbing panel 5, it will come into contact with steam for many years. However, since the ceramic sound absorbing panel 5 is not likely to deteriorate, there is an advantage that it can be maintenance-free.

[0017]

As described in detail above, the split type vapor silencer of the present invention can be carried by an elevator by dividing it into units, and the divided members can be individually assembled. Since it can be put in, it is possible to assemble with a slight lifting device,
This makes installation and replacement work much easier, safer, and cheaper than before. Therefore, the present invention has a great contribution to the industrial development as a split-type steam silencer that eliminates the conventional drawbacks.

[Brief description of 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 showing a fixing structure of a ceramic sound absorbing panel inside a silencer unit.

FIG. 4 is a cross-sectional view showing another fixing structure of the ceramic sound absorbing panel inside 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]

1 silencer unit 4 casing 5 sound absorbing panel 6 side plate 7 Sound absorbing panel mounting part

Claims (3)

[Claims] 1. A sound absorbing panel mounting portion is formed on a side wall of a hollow casing at a predetermined interval, and both ends of a plurality of sound absorbing panels are fitted vertically into the sound absorbing panel mounting portion so as to be housed vertically in the casing. A silencer unit is constructed by stacking such silencer units in multiple stages in the height direction, and is a split type silencer for steam. 2. The split type vapor silencer according to claim 1, wherein the sound absorbing panel is a hollow frame made of metal having porous ceramic sound absorbing plates attached to both side surfaces thereof. 3. The split mold according to claim 1, wherein the sound absorbing panel is a hollow metal frame filled with a fiber sound absorbing material, and metal perforated plates are attached to both sides of the frame. Silencer for steam.