JPH10288496A - Discharge suppression device for vapor from vapor discharge part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge suppression device for vapor from a vapor discharge part that has a simple structure, can be mounted to an existing facility simply and inexpensively, and at the same time, prevent the vapor discharge part from being blocked, and can suppress the discharge of vapor effectively. SOLUTION: A rotating blade 3 is arranged at the upper inside of a vapor discharge part 2 so that it can be rotated freely and a cylindrical slit 4 is provided between the rotating blade 3 and an inner wall 2a of the vapor discharge part 2. Then, the vapor which has come rising along the vapor discharge part 2 is scattered sideways by the rotating blade 3. The scattered vapor passes through the slit 4, bounces off the inner wall 2a of the vapor discharge part 2, passes through the slit 4 again, condenses when the vapor passes through the slit 4, and condenses and drops on the slid 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention suppresses the amount of steam discharged from a steam discharge portion of a cooling tower or a smoke discharge portion of an incinerator or the like so that water vapor and harmful substances contained in the water vapor diffuse into the atmosphere. The present invention relates to a device for suppressing the discharge of water vapor from a vapor discharge part for preventing the occurrence of water vapor.

[0002]

2. Description of the Related Art Generally, cooling towers installed in factories, buildings, and the like are designed to cool hot water whose temperature has been raised by cooling a high-temperature and high-pressure refrigerant gas with an air conditioner and return it as cooling water for the refrigerant. In the cooling tower, part of the warm water is evaporated, and the heat of evaporation is taken from the warm water to lower the water temperature and cool. For this reason,
Not only does the evaporation from the cooling tower evaporate but also the water splashes off on the air accelerated by the blower, so not only is considerable water consumed, but also carbonates dissolved in the cooling water and Silica is deposited by evaporation of water vapor to form scale and adhere to the pipe. In addition, when the discharged air is diffused into the atmosphere when the outside air temperature is low or the humidity is high, it becomes temporarily oversaturated and white smoke is generated, causing traffic obstruction and legionella bacteria. In addition to being scattered, it may cause a trouble such as misidentification of fire or emission of harmful substances.

[0003] In addition, the moisture contained in the garbage evaporates from the smoke incinerator and a large amount of water vapor is discharged, and dioxin and hydrogen chloride harmful to the human body are dissolved in the moisture. It also causes acid rain. For this reason, even if the amount discharged at a time is small, the atmosphere is continuously polluted, and it is unavoidable that a significant environmental problem will occur for a long time unless effective measures are taken.

As a technique for preventing the generation of water vapor by the above-mentioned smoke conduction and the like, a technique utilizing a cyclone is known. Further, a wire mesh is provided at an upper end opening of a vapor discharge section for the smoke conduction and the like, and the discharged water vapor is removed. Attempts have been made to condense water by bringing it into contact with a wire mesh, to condense the water, to drop it, and to collect it.

[0005]

However, the equipment utilizing the cyclone is large and expensive. In addition, in the case where the wire mesh is stretched, the efficiency is low due to the presence of water vapor passing through the wire mesh, and not only the steam but also the solids are discharged from the steam discharge portion, so that the wire mesh is easily clogged. Because it becomes exhaust resistance and emission efficiency decreases,
The wire mesh had to be cleaned frequently and the management was very troublesome.

The present invention solves the above-mentioned problems, and has a simple structure and can be easily and inexpensively installed in existing equipment.
It is an object of the present invention to provide an apparatus for suppressing the discharge of steam from a steam discharge section, which is less likely to cause clogging of the steam discharge section and which can effectively suppress discharge of water vapor.

[0007]

According to the present invention, there is provided an apparatus for suppressing the discharge of water vapor from a steam discharge section according to the present invention, wherein a rotating blade is rotatably disposed inside an upper portion of a steam discharge section such as a smoke guide. And, a cylindrical slip is provided between the rotating blades and the inner wall of the steam discharging portion, and the steam rising along the steam discharging portion is scattered to the side by the rotating blades,
The scattered water vapor passes through the above-mentioned slip and rebounds on the inner wall of the vapor discharge part, so that it again passes through the slip, and when the water vapor passes through the slip, the water vapor condenses and condenses on the slip to descend. I do.

It is preferable that two or more rotating blades are provided along the steam discharge portion.

Further, the rotating blades apply the steam rising in the steam discharge portion to a surface in a radial direction of the steam discharge portion.
It is preferred that the particles be scattered laterally at an angle of 5 ° to 60 °.

Further, it is preferable that the cross-sectional area of the space between the inner wall of the steam discharge portion and the slip is substantially equal to the cross-sectional area of the steam discharge portion.

It is preferable that a baffle plate is formed on the inner wall of the steam discharge portion at a position above the rotary blade so as to protrude inward.

It is preferable that an outside air intake is formed at a position below the rotating blades of the steam discharge section. In this case, the outside air is forcibly supplied to the outside air between the steam discharge section and the slip. It is preferable to provide an intake fan that feeds the air into the intake fan.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example in which a cooling tower is provided with a device for suppressing the discharge of water vapor. A rotary blade 3 is rotatably arranged inside the steam discharge portion 2, a cylindrical slide 4 is provided between the rotary blade 3 and the inner wall 2 a of the steam discharge portion 2, and the upper and lower steam discharge portions 2 are provided. Between them, an outside air intake 5 is formed at a position below the rotary blade 3. An intake fan 6 is provided in the outside air intake 5
Is provided. The rotating blades 3 and the intake fan 6 are attached to a common rotating shaft 7, and
The upper end of the rotating shaft 7 is connected to a fan motor 9 via a belt 8.
It is connected to. Further, a baffle plate 11 protruding inward is formed on the upper inner periphery of the inner wall 2a of the steam discharge section 2.

The rotating blade 3 scatters water vapor that has risen in the steam discharge section 2 during rotation to the side.
The intake fan 6 draws in outside air from the outside air intake 5. The slip 4 is made of a mesh material such as a wire mesh, and is for passing water vapor and condensing the water vapor.

In the above configuration, if the fan motor 9 is operated while the steam is being discharged from the cooling tower, the rotating blades 3 and the intake fan 6 rotate.
The water vapor that has risen along the side is scattered laterally by the rotary blade 3 as shown by the arrow A. After the scattered water vapor passes through the above-mentioned slip 4, the inner wall 2 of the vapor discharge part 2
When it hits a, it rebounds, and is further guided by the baffle plate 11 and passes through the slip 4 again as shown by the arrow B.

The outside air is forcibly forced from the outside air intake port 5 by the intake fan 6 to the steam discharge section 2 and the slide 4.
The space S and the slide 4 are cooled by the outside air. Therefore, the space S
Then, the steam is cooled and condensed by mixing of the steam and the outside air, and dew forms on the slip 4. The dew drops along the slide 4 by its own weight and is collected again as cooling water.

If the space S between the slide 4 and the steam discharge section 2 is too large, the water vapor comes into contact with a large amount of cold outside air, but the scattering speed of the water vapor passing through the slide 4 decreases. The inner wall 2 of the steam discharge section 2
I can't bounce back with a. If the space S is too small, the water vapor rebounds well, but the condensation with the outside air is insufficient because of insufficient contact with the outside air. For this reason, it is preferable that the cross-sectional area of the space S between the slip 4 and the steam discharge section 2 and the cross-sectional area of the steam discharge section 2 be substantially equal. As a result, the steam that is blown from the steam discharge unit 2 by the rotating blades 3 and enters the space S between the slip 4 and the steam discharge unit 2 and is sucked into the space S between the slip 4 and the steam discharge unit 2 by the intake fan 6. Since the amount of the outside air becomes substantially equal, the steam can be sufficiently condensed, and the rebound of the steam becomes sufficient.

Further, in order for the water vapor scattered by the rotary blades 3 to bounce against the inner wall 2a of the discharge section and pass through the slip 4 again, the water vapor must be applied to the radial surface of the vapor discharge section 2 by 45 degrees. It is preferred that the particles be scattered laterally at an angle of about 60 °. If the angle is smaller than the above range, the spring cannot rebound. If the angle is larger than the above range, the angle of the rebound is too small to be able to pass through the slip 4 again.

When the outside air temperature is low, such as in winter,
The intake fan 6 is not always necessary.

According to the above-described device for suppressing the discharge of steam, the steam comes into contact with the slide 4 at least twice by the rebound effect, although the number of the slides 4 in the steam discharge section 2 is one. The probability of occurrence of dew condensation increases, and the discharge of water vapor can be effectively prevented. Further, since the steam and the slide 4 are cooled by using outside air, no special cooling device is required. Therefore, since the structure is simple and the cooling tower can be installed without making any changes to the existing cooling tower, the installation cost of the apparatus can be reduced. Even a new cooling tower can be installed easily.

Further, since most of the water vapor in the vapor discharge section 2 is condensed, falls and is reused, wasteful discharge of the water vapor is suppressed, and it is possible to contribute to saving of water resources macroscopically. . In addition, the generation of white smoke is prevented, and since the cooling water is not concentrated, the generation of scale due to the precipitation of carbonate or silica is also effectively prevented. Therefore, many of the causes of the troubles caused by the conventional large-volume discharge of water vapor are eliminated, and the management of the cooling tower is greatly facilitated.

Further, since the slide 4 is formed along the length direction of the steam discharge portion 2, that is, along the same direction as the discharge direction of steam, clogging hardly occurs. It does not become a resistance to discharge and cleaning is easy. In particular, as shown in the figure, when the slide 4 is formed to have substantially the same diameter as the steam discharge section 2 of the cooling tower, clogging hardly hinders the discharge of steam.

Next, FIG. 2 shows an example in which the rotary blades 3 are provided in two stages on the same rotary shaft along the steam discharge section 2. In this case, the outside air intake 5 and the intake air are provided below the rotary blades 3 in each stage. A fan 6 is provided.

As described above, by providing the rotating blades 3 in a plurality of stages, the steam that has risen along the steam discharge portion 2 passes through the slide 4 many times by the rotating blades 3, so that the condensation efficiency is further improved. improves.

In order to increase the number of times of contact between the steam and the slide 4, the rotating blades 3 and the slide 4 are arranged in multiple stages as in the above-described example, and as shown in FIG. May be provided two or three times. Slid 4
By increasing the frequency of contact between water and steam, the amount of dew condensation of steam can be further increased.

FIG. 3 shows an example in which an incinerator is provided with a device for suppressing the discharge of water vapor. In the incinerator, a cylindrical vapor discharge portion 2 which is one size larger than that of a normal incinerator 10 (steam discharge portion) is formed. ,
The rotary blades 3 are rotatably arranged inside the steam discharge unit 2, and a cylindrical slit 4 is provided between the rotary blade 3 and the inner wall 2 a of the steam discharge unit 2.
Between 0, the outside air intake port 5 is formed below the rotary blade 3. An intake fan 6 is provided in the outside air intake 5, and the rotating blades 3 and the intake fan 6 are attached to a common rotating shaft 7.

Similarly to the above-described rotary blade 3, the rotary blade 3 also blows water vapor to the side. The plane is configured as shown in FIG. 4 and the bottom is configured as shown in FIG. The rotating blades 3 and the intake fan 6 are rotated by the steam pressure of the steam blown up along the smoke guide 10. However, when the steam pressure is low, the rotating blades 3 and the intake fan 6 may be forcibly rotated by a motor or the like.

On the upper part of the inner wall 2a of the steam discharge part 2,
Baffle plate 11 protruding inward above rotating blade 3
Is provided around.

Also in the above configuration, the steam rising along the smoke guide 10 is scattered to the side by the rotary blade 3 as shown by the arrow A. After the scattered water vapor passes through the above-mentioned slide 4, it hits the inner wall 2a of the vapor discharge section 2 and rebounds. From outside air intake 5, steam exhaust unit 2 and slide 4 are forcibly forced by intake fan 6.
Outside air is sucked into the space S between
The slide 4 is cooled by the outside air. Therefore, when the water vapor passes through the slide 4, it condenses and condenses on the slide 4. The dew drops along the slide 4 due to its own weight and is collected. As a result, harmful dioxins and hydrogen chloride contained in water vapor are also collected without being released to the atmosphere, so air pollution is greatly reduced compared to the past.
It is also beneficial in protecting the global environment.

Also in this example, the same effect as in the case of the apparatus for suppressing the discharge of steam shown in FIG. 1 can be obtained, but in particular, since the rotating blades 3 are rotated by the steam pressure, no power is required at all. Of course, when the vapor pressure is low, a power source may be required.

FIG. 6 shows an example in which a device for suppressing the discharge of water vapor is provided in the smoke guide 10 in which bumping occurs. In this case, the rotating blades 3 (see FIG. (The same configuration as shown) is rotatably arranged, and a cylindrical slide 4 is provided in a double manner between the rotary blade 3 and the inner wall 10a of the steam discharge section 10. The rotating blades 3 of this example also rotate by the steam pressure of the steam discharge unit 10.

According to the above configuration, when the discharged water vapor becomes supersaturated and the mist becomes water droplets and scatters, causing a bumping phenomenon in the smoke guide 10, water particles are blown to the side by the rotating blades 3, When rebounding from the inner wall 10a of the steam discharge portion 10, it hits the slide 4 and combines to grow large and descends by its own weight. Moreover, since the slips 4 are arranged in a multiplex manner, even if water drops pass through one of the slips 4, they are collected by the next slip 4. Therefore, even if the inside of the steam discharge part 2 is in a bumping state, it is possible to effectively prevent a large amount of water from splashing outside.

In this case, since the water vapor in the vapor discharge section 2 has already turned into water droplets, it is not necessary to draw in outside air.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view when a device for suppressing the discharge of steam from a steam discharge unit according to the present invention is applied to a cooling tower.

FIG. 2 is a sectional view of an example in which rotary blades are provided in two stages.

FIG. 3 is a cross-sectional view of the case where the above-described water vapor emission control device is applied to a smoke guide of an incinerator.

FIG. 4 is a sectional view of an essential part taken along line XX of FIG. 3;

FIG. 5 is a sectional view of an essential part taken along line YY of FIG. 3;

FIG. 6 is a cross-sectional view of another example of the water vapor emission control device.

[Explanation of symbols]

 1, 2, 10 Steam discharge unit 2a Inner wall 3 Rotating blade 4 Slid 5 Outside air intake 6 Intake fan 11 Baffle plate

Claims (7)

[Claims] 1. A rotary blade is rotatably disposed inside an upper portion of a steam discharge portion such as a smoke guide, and a cylindrical slip is provided between the rotary blade and an inner wall of the steam discharge portion. The rising steam is scattered to the side by the rotating blades, and the scattered steam passes through the above-mentioned slip and rebounds on the inner wall of the steam discharge portion so that the steam again passes through the slip, and condenses when the steam passes through the slip. A device for suppressing the discharge of water vapor from a vapor discharge part, wherein the water vapor is condensed on a slip and is lowered. 2. The apparatus according to claim 1, wherein the rotating blades are provided in two or more stages along the steam discharge section. 3. The steam turbine according to claim 1, wherein the rotating blades move the steam that has risen in the steam discharging portion at an angle of 45 ° with respect to a radial surface of the steam discharging portion.
The apparatus for suppressing the discharge of water vapor from a vapor discharge part according to claim 1, wherein the water vapor is scattered laterally at an angle of 60 °. 4. The discharge of steam from the steam discharge unit according to claim 1, wherein a cross-sectional area of a space between an inner wall of the steam discharge unit and the slip is substantially equal to a cross-sectional area of the steam discharge unit. Suppression device. 5. The apparatus according to claim 1, wherein a baffle plate is formed on an inner wall of the steam discharge portion so as to protrude inward above the rotary blade. 6. The apparatus according to claim 1, wherein an outside air intake is formed below the rotary blade in the steam discharge section. 7. The apparatus according to claim 6, wherein an intake fan is provided in the outside air intake for forcibly sending outside air between the steam discharge section and the slip.