JPH07145926A - Gas leakage preventing apparatus for damper of high-temperature gas furnace - Google Patents

Abstract

PURPOSE:To prevent leakage of gas by standing a watercooled jacket for holding water at a predetermined level in a cylindrical drawing port of a damper on a flue of a hightemperature gas furnace, and forming a lower end of a peripheral wall of a post from an opened upper end in a reverse box shape to be always submerged in the water. CONSTITUTION:A drawing port 7 for raising a water-cooled damper 2 is provided at a flue 1, a post 5 is stood at an upper end of the damper 2, and the port 7 is sealed with a water-cooled jacket 6 and a jacket cover 9. The damper 2 is hollow. The post 5 is used also as a water supply tube from a water storage tank 11, sidewalls are fully filled with water via both inner and outer walls 15, 16, and the water is held at a predetermined level. The upper end is opened with the entire periphery, and a peripheral wall 25 of the cover 9 of a reverse box shape is inserted into the sidewall of the jacket. It is vertically moved up or down together with the damper 2, and submerged under the water irrespective of its height. Even if the damper 2 is raised, a sealed state is held to prevent leakage of gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leakage prevention device for sealing a damper outlet in a damper part of a high temperature gas furnace such as an incinerator for waste such as tires and plastics.

[0002]

2. Description of the Related Art In an incinerator for waste such as tires and plastics, a flue is provided between a primary combustion furnace and a secondary combustion furnace, and the waste is incompletely burned in the primary combustion furnace and Air is mixed into the complete combustion gas by the flue and sent to the secondary combustion furnace, where it is completely combusted in the secondary incinerator. Moreover, in order to utilize the thermal energy, the hot gas of the secondary combustion furnace may be sent to the heat exchange casing.

In such a high temperature gas furnace, a damper is provided in a flue or a furnace (generally referred to as a flue in this specification) in order to divide the high temperature gas and adjust the feed rate.

Conventionally, regarding the opening and closing of the damper, the upper wall of the flue is provided with an outlet for lifting the damper, and the flue is opened and closed by raising and lowering the damper inserted in the outlet. It was

[0005]

The outlet of the damper is not a simple opening but is generally formed in a tubular shape which serves as a guide for pulling up the damper. In any case, it is necessary for opening and closing the damper. Since a large dimensional allowance is required, a gap is provided between the outlet and the damper, and the inconvenience of high temperature and high pressure gas spouting from the gap is unavoidable. There was a problem of causing deterioration and danger.

Since the inside of the flue is affected by extremely high temperatures,
Since a material suitable for sealing cannot be used for the outlet, this also causes the gas ejection to be unavoidable. Further, the gap at the outlet of the damper becomes larger as the damper becomes larger, which has also been a constraint for building a large-scale high-temperature gas reactor.

The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a gas leakage prevention device in a damper part of a high temperature gas reactor in which high temperature and high pressure gas is never ejected from an outlet of a damper provided in a flue.

[0008]

In order to achieve the above object, the present invention provides a water cooling jacket projecting above the outlet of the damper on the flue, and the water cooling jacket is arranged so that the damper can rise. The water-cooling jacket has a side wall that is hollow so that the water is kept at a constant water level inside, the upper end is open over the entire circumference, the pillar is erected on the damper, and the jacket cover is installed on the pillar. By installing the jacket cover, the lower end of its peripheral wall was formed into an inverted box shape in which the lower end of the peripheral wall is always immersed in the water of the water cooling jacket, and a gas leakage prevention device was constructed in the damper part of the high temperature gas reactor.

[0009]

[Operation] During operation of the high temperature gas reactor, water is constantly injected into the water cooling jacket. Then, even if high-temperature gas blows into the water-cooling jacket through the damper outlet, the water-cooling jacket will not be damaged by the high temperature, and the peripheral wall of the jacket cover will be submerged in the water of the water-cooling jacket to completely seal the water-cooling jacket. There is.

Although the jacket cover is attached to the column, unlike the case where the column can be moved up and down with respect to the jacket cover, there is no gas leakage between them, and the jacket cover is lifted by lifting the damper. Even if it goes up, the lower end of its peripheral wall is also submerged in the water of the water cooling jacket, so that the gas never leaks to the outside.

If the jacket cover is water-cooled, the prevention of gas leakage becomes even more complete.

[0012]

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

FIG. 1 and FIG. 2 show an embodiment, in which the flue 1 for feeding the high temperature gas from the secondary combustion furnace to the heat exchange casing (in the direction of the arrow) is used. It can be applied not only to the flue from the furnace to the secondary combustion furnace, but also to the case of partitioning the furnace body with a damper.

The gas leakage prevention device is provided with an outlet 7 for lifting the water-cooled damper 2 of the flue 1, a column 5 is erected on the upper end of the water-cooled damper 2, and the outlet 7 of the water-cooled damper 2 is provided with a water-cooling jacket 6. Then, it is sealed by the jacket cover 9.

The water-cooled damper 2 is formed in a hollow space filled with water, and has a pair of left and right columns 5 and 5 provided upright on the upper surface thereof.
The pillar 5 serves as a water supply pipe for the water-cooled damper 2,
A water storage tank 11 is provided at the upper end of the water storage tank 11.
A drain port 13 is provided in the water storage tank 11 so that a constant water level is maintained therein, and water is constantly supplied to the water storage tank 11.

The water cooling jacket 6 has a square tubular shape,
The main side wall is hollow so that the inner and outer walls 15 and 16 are filled with water, and the upper end is open over the entire circumference. Further, a drainage port 19 is provided at the upper end so that the water level P is kept constant, and a drainage pipe 21 is connected to the drainage port 19. Then, the drain pipe 14 of the water storage tank 11 and the drain pipe 21 thereof are opened to the drain receiver 23.

The jacket cover 9 has an inverted box shape,
Attached to the stanchions 5, 5, the peripheral wall 25 is inserted into the side wall of the water cooling jacket 6. Although it moves up and down together with the damper 2, the lower end of the peripheral wall 25 is submerged below the water surface of the water cooling jacket 6 regardless of its height.

The jacket cover 9 can also be water-cooled. The water supply to the water cooling jacket 6 and the water cooling jacket cover 9 may be taken in from the support column 5 or a separate water supply device may be provided. Also,
Post 5 to jacket cover 9, jacket cover 9
A method of supplying water from the water cooling jacket 6 is also conceivable.

With respect to the opening / closing device of the water-cooled damper 2, the suspension member 31 is passed from the water storage tank 11 to the column 5, the lower end thereof is connected to the bottom surface of the water-cooled damper 2, and the suspension member 31 can be pulled up by an elevator (not shown). Things
As for the elevator, the suspension member 31 is wound around a drum by a motor or lifted by a hydraulic cylinder.

By constructing the opening / closing device for the water-cooled damper 2 in this way, there is no risk of the hanging member 31 and the like coming into contact with the hot gas and being cut off, which is safe.

As another opening / closing device for the water-cooled damper 2,
A method of moving the water storage tank 11 up and down by a hydraulic cylinder can be considered. Also in this case, a hydraulic cylinder or rod is provided outside the water cooling jacket 6 for safety.

The outlet 5 of the water-cooled damper 2 provided on the flue 1 has a water-cooled jacket 6 and a jacket cover 9.
When the water-cooled damper 2 is lifted up, the water-cooled jacket 6 also rises. However, even when the water-cooled damper 6 is raised, the peripheral wall 25 of the jacket cover 9 is submerged in the water of the water-cooled jacket 6, so that the sealed state is maintained. To be done.

The damper 2, the support column 5, the water cooling jacket 6 and the jacket cover 9 are made of refractory metal, but the surface which comes into contact with high temperature gas may be coated with a refractory material.

FIG. 3 shows another embodiment, which is basically the same as the above embodiment, but in order to make it easier for the water-cooled damper 2 to be received by the sealing material 39 provided in the flue 1.
The water-cooled damper 2 is tilted in that direction. In addition, the inclination of the pillar 5, the water cooling jacket 6, the jacket cover 9,
The water storage tank 11 is tilted.

In this way, the ability of the water-cooled damper 2 to divide the high temperature gas is improved, and fine adjustment of the gas flow rate is ensured.

Although water is used for water cooling, it does not violate the spirit of the present invention even if another liquid or fluid instead of water is used.

[0027]

As described above, according to the present invention, the cylindrical water cooling jacket surrounding the outlet of the damper is projected on the flue, and the jacket cover is attached to the pillar erected on the damper. The jacket cover is formed in an inverted box shape where the lower end of its peripheral wall is constantly immersed in the water of the water-cooling jacket, so that the outlet of the damper provided in the flue is completely sealed, and high-temperature gas blows into the water-cooling jacket from the outlet. Even so, it never leaks to the outside, and there is an excellent effect that the deterioration of the working environment and the danger due to the high-temperature gas leaking from the outlet can be surely prevented.

If the jacket cover is water-cooled, the effect will be more remarkable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional explanatory view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram corresponding to FIG. 1 showing another embodiment.

[Explanation of symbols]

 1 Flue 2 Damper 5 Support 6 Water-cooling jacket 7 Draw-out port 9 Jacket cover 25 Perimeter wall P Water level of water-cooling jacket

Claims (2)

[Claims] 1. A water-cooling jacket surrounding the outlet of the damper is projected on the flue, the water-cooling jacket is formed in a tubular shape so that the damper can rise, and the side wall of the water-cooling jacket has a constant water level inside. It is formed in a hollow shape, and the upper end is opened over the entire circumference, the pillar is erected on the damper, the jacket cover is attached to the pillar, and the lower end of the jacket wall is always immersed in the water of the water cooling jacket. A gas leakage prevention device in a damper part of a high temperature gas reactor, which is formed in an inverted box shape. 2. A gas leakage prevention device in a damper part of a high temperature gas reactor according to claim 1, wherein the jacket cover is water-cooled.