JPH0938441A - Multistage tower scrubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency in removing dust, etc., by providing a perforated hot water plate and a perforated cold water plate thereon in a cleaning tower, passing the sucked air upward through the perforated hot water plate to bring the air into contact with the hot water and passing the air upward through the perforated cold water plate to bring the air into contact with the cold water. SOLUTION: Air is sucked into a cleaning tower 1 from an air suction port 2 by operating a fan 6. The air is passed through the through holes of a perforated hot water plate 3, brought into contact with the hot water and supersaturatedly humidified. The humidified air is passed through the through holes of a perforated cold water plate 4 and brought into contact with the cold water, and the dust, etc., in the air are removed. Namely, the humidified air is brought into contact with the cold water and cooled to form a waterdrop with the dust particle as a nucleaus. The waterdrop having a dust particle is captured by the cold water on the plate 5, the air passed through the cold water plate 4 is passed through an eliminator 14 and freed from the waterdrop, etc., and the cleaned air is discharged outside the tower 1.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a multi-stage tower scrubber.

[0002]

2. Description of the Related Art Conventionally, it has been known as a type of air cleaner for removing dust and the like in the air by bringing air and water into contact with each other. In this multi-stage tower scrubber, a perforated plate having a large number of upper and lower through-holes is horizontally provided in one or multiple stages in the washing tower, and air is brought into contact with water by the perforated plate to remove dust and the like in the air. That is, air is sucked into the washing tower so as to pass through the through holes of the perforated plate from bottom to top, while the washing water is supplied onto the perforated plate, and the perforated plate is used to wash the inside of the washing tower. The air drawn in and the washing water come into contact with each other.

By the way, in the conventional multi-stage tower scrubber,
In order to improve the efficiency of removing dust etc. in the air, the washing water supplied on the perforated plate is made cold water, and the air sucked into the washing tower is cooled by this air before it contacts the cold water at the perforated plate. Some spray pressurized steam to supersaturate the air.

[0004]

However, in such a multi-stage tower scrubber, since a steam generator and a pressurizer for spraying pressurized steam to air are required, the device becomes complicated, Moreover, there is a drawback that the power cost becomes large.

The present invention has been made in view of the above circumstances, and provides a multi-stage tower scrubber capable of improving the removal efficiency of dust and the like in the air with a simple structure.

[0006]

A multi-stage tower scrubber according to a first aspect of the present invention has a washing tower having a large number of upper and lower through-holes horizontally provided with a porous hot water plate to which hot water is supplied from above. Above the porous hot water plate in
It has a large number of upper and lower through holes and is horizontally provided with a perforated cold water plate to which cold water is supplied from above, and the air sucked into the washing tower is passed through the perforated hot water plate from the bottom to the top to make contact with the hot water. Further, the porous cold water plate is passed from the bottom to the top to be brought into contact with the cold water to remove dust in the air, and the purified air is discharged from the washing tower.

The multi-stage tower scrubber according to claim 2 is the multi-stage tower scrubber according to claim 1, wherein a water passage for escaping cold water overflowing on the perforated cold water plate is provided in the washing tower. It is a feature.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view showing a multistage tower scrubber according to an embodiment of the present invention.

The multi-stage tower scrubber according to the embodiment has a box-shaped cleaning tower 1 having a large number of upper and lower through-holes, and a horizontal porous water plate 3 to which hot water is supplied from above is horizontally provided. A porous cold water plate 4 having a large number of upper and lower through holes and having cold water supplied from above is horizontally provided above the porous hot water plate 3 in the washing tower 1.

A hot water supply pipe 8 for supplying hot water from the hot water heater 10 to the porous hot water plate 3 is provided above the porous hot water plate 3. Above the porous cold water plate 4, a water supply pipe 7 for supplying cold water from the cold water cooler 9 to the porous cold water plate 4 is provided.

An air suction port 2 is provided in the lower part of the side wall of the washing tower 1, and an air sending port 5 is provided in the ceiling part. Air is sent into the washing tower 1 through the air suction port 2. The fan 6 is attached. An eliminator 14 is horizontally provided between the porous cold water plate 4 and the air outlet 5.

The lower end of the inside of the washing tower 1 is a water storage tank 15 in which the warm water supplied onto the porous hot water plate 3 drops through the through holes of the porous plate 3 and accumulates therein. Further, the washing tower 1 is provided with a drain pipe 11 for discharging water from the water storage tank 15. The drainage pipe 11 is provided with a drainage valve 12, and is installed in the water storage tank 15 at the lower end of the washing tower 1.

Further, in the washing tower 1, the upper end is opened above the porous cold water plate 4, and the lower end is the water storage tank 1.
A water passage 13 that opens in 5 is formed.

Next, the operation of the multi-stage tower scrubber according to this embodiment will be described. First, when the fan 6 is operated, air is sucked into the washing tower 1 through the air suction port 2. This air passes through the through holes of the porous hot water plate 3, contacts the hot water supplied onto the porous hot water plate 3, and is humidified to a supersaturated state. Here, the hot water is not particularly limited in its temperature and may be any temperature that is equal to or higher than the dew point temperature of the air sucked into the cleaning tower 1. Considering easiness, it is preferable that the temperature is sufficiently higher than the dew point temperature of air. For example, if the temperature of the air sucked into the washing tower 1 is 27 ° C. and the humidity is 50% (dew point temperature 16.6 ° C.), the temperature is 40%. It is preferable to use warm water of about ° C.

The air humidified in the supersaturated state as described above passes through the through holes of the porous cold water plate 4 and comes into contact with the cold water supplied onto the porous cold water plate 4 to remove dust and the like in the air. . That is, the supersaturated humidified air comes into contact with cold water in the perforated cold water plate 4, whereby the air is cooled and the dust particles contained in the air cause condensation of water, and the dust particles become water droplets and become large. grow up. The water droplets having the dust particles grown in such a large size are easily captured by the cold water on the perforated cold water plate 4,
This reduces the minimum particle size of dust that can be removed to a particle size that is about an order of magnitude smaller. Here, the cold water is not particularly limited in its temperature, and may be any temperature that is low enough to cause the contacted air to condense, for example, below the dew point temperature of the air sucked into the washing tower 1. It should be set to. For example, if the temperature of the air sucked into the washing tower 1 is 27 ° C. and the humidity is 50% (dew point temperature 16.6 ° C.), it is preferable to use cold water at 16 ° C. or lower.

Further, the air that has passed through the perforated cold water plate 4 passes through the eliminator 14 to remove water droplets having dust particles and the like, and then becomes clean air and is sent out of the washing tower 1 from the air outlet 5. .

As described above, the multi-stage tower scrubber has a relatively simple structure in which the air sucked into the washing tower 1 is brought into contact with hot water at the porous hot water plate 3 before passing through the porous cold water plate 4. Can be humidified to a supersaturated state.

By the way, in the multi-stage tower scrubber,
When the air and the hot water are brought into contact with each other in the porous hot water plate 3, it is preferable that the velocity (perforation acceleration) of the air passing through the through holes of the porous hot water plate 3 is set within a stable operation range. The stable operation range is a speed range from the liquid stagnation start speed to the flooding speed or the wading speed at the hole acceleration. Here, the liquid stagnation start speed is the speed at which hot water starts to stay on the perforated hot water plate 3 due to an increase in the air penetration speed, and the flooding speed is a larger air penetration speed. That is, the liquid level of the hot water staying on the porous hot water plate 3 starts to rise, and the wading speed is the speed at which the hot water does not drop from the through hole of the porous hot water plate 3.

By making the contact between the air and the hot water in the porous hot water plate 3 within a stable operation range, a good contact state between the air and the hot water can be obtained, and at the same time, the through hole of the porous hot water plate 3 makes contact with the air. By supplying new hot water from the hot water supply pipe 8 while dropping the cooled hot water, the water temperature can be kept constant.

In the multi-stage tower scrubber, it is preferable to waving the porous cold water plate 4 when the air and the hot water are brought into contact with each other. That is, by setting the hole passing acceleration at which the air passes through the through holes of the perforated cold water plate 4 to be equal to or higher than the waving speed, the cold water falls from the through holes of the perforated cold water plate 4 to lower the hot water temperature on the perforated hot water plate 3. This can be prevented. However, in this case, the perforated cold water plate 4
Although the water level of the cold water rises above, the overflowed cold water can overflow from the water passage 13 whose upper end opens above the perforated cold water plate 4 and flow into the water tank 15. ing.

[0021]

According to the multi-stage tower scrubber according to the first aspect, the air sucked into the washing tower can be brought into a supersaturated state by passing through the porous hot water plate from the bottom to the top to bring it into contact with the hot water. By passing this supersaturated air through the perforated cold water plate from the bottom to the top and bringing it into contact with cold water, water particles condense with the dust particles contained in the air as nuclei, and the dust particles grow large as water droplets. , Easier to be captured. Therefore, the efficiency of removing dust and the like in the air can be improved. The multi-stage tower scrubber humidifies the air to a supersaturated state by a relatively simple structure in which the air taken into the washing tower is brought into contact with hot water on the porous hot water plate before passing through the porous cold water plate. Is something that can be done.

A multi-stage tower scrubber according to a second aspect is the multi-stage tower scrubber according to the first aspect, wherein a water passage capable of escaping cold water overflowing on the perforated cold water plate is provided in the washing tower. Even if the air and the cold water are brought into contact with each other by waving on the perforated cold water plate, there is no fear that the cold water overflows from the washing tower.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a multi-stage tower scrubber according to an embodiment of the present invention.

[Explanation of symbols]

 1 Washing Tower 2 Floor Panel 3 Air Inlet 4 Perforated Cold Water Plate 5 Air Outlet 13 Water Passage

Claims (2)

[Claims] 1. A washing tower having a large number of upper and lower through holes,
Horizontally provided with a porous hot water plate to which hot water is supplied from above, above the porous hot water plate in the washing tower,
It has a large number of upper and lower through holes and is horizontally provided with a perforated cold water plate to which cold water is supplied from above.The air sucked into the washing tower is passed through the perforated hot water plate from the bottom to the top to make contact with the hot water. Furthermore, the multistage tower scrubber is characterized in that it passes through a perforated cold water plate from the bottom to the top and is brought into contact with cold water to remove dust in the air, and the purified air is discharged from the inside of the washing tower. 2. The multi-stage tower scrubber according to claim 1, wherein a water passage capable of releasing cold water overflowing on the perforated cold water plate is provided in the washing tower.