JP2816713B2 - Method and apparatus for producing ultra-fine water droplets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and an apparatus for producing ultra-fine water droplets capable of obtaining 50 million or more ultra-fine water droplets having a particle size of 0.5 μm or less per m ^{3 of} air. .

[Conventional technology]

Conventionally, hospitals, pharmaceutical manufacturing factories, food manufacturing factories, food refrigerators, research laboratories, laboratories, etc. require clean air that does not contain dust or microorganisms. Measures such as installing curtains are being taken. However, according to the above-described method, it is not possible to obtain sufficiently purified air, and it is not possible to sufficiently achieve the object even by using an air shower room.

In recent years, such as LSI, ultra LSI manufacturing plant, biologics manufacturing plant, precision equipment washing plant, aseptic food manufacturing plant, operating room, refrigeration room, etc.
Many factories and the like require ultra-clean clean air under strict conditions that do not allow dust of 5 μm or less.

For various factories, operating rooms, refrigeration rooms, etc., which need to be highly purified, it is relatively easy to produce the above-described ultra-clean clean air.
JP-A-62-68515 and JP-A-62-68516 are known.

This conventional example is configured as follows. That is, a large number of, for example, 30 to 1500 diameters of 0.2 to 8 mm, preferably 0.
A nozzle of 5 to 3 mm is provided. Water is fed by a pump at a higher pressure, gauge pressure 0.3~5.5Kg / cm ^2, preferably 0.
Water is sprayed from each nozzle at 5 to 2.5 kg / cm ² , and a large amount of water is sprayed as much as 1 to 3 / min per nozzle. The water collides with the inside of the water injection device at a distance of 10 to 150 cm from the nozzle, generating a large number of ultra-fine water droplets. In this conventional example, air is introduced into the water injection device from the air introduction pipe at a wind speed of about 15 to 50 m / sec and an air volume of 3 m / sec.
The air is fed at a standard of about 3,000 m ³ / _min to obtain air containing 50 million or more ultra-fine water droplets having a particle size of 0.5 μm or less per m ³ of air.

[Problems to be solved by the invention]

However, in the conventional example described above, the device becomes very large, and in particular, the water injection device becomes large, the installation space is widened, and the device itself has a complicated structure, so that it is expensive. Easy to be.

Therefore, the present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a method and an apparatus for producing ultra-fine water droplets having a simple structure and requiring almost no installation space.

[Means for solving the problem]

In order to solve the above problems, the method for producing ultra-fine water droplets of the present invention comprises supplying water to a high-speed rotating impeller during air conveyance at a gauge pressure of −0.20 to 3.5 kg / cm ² , water by impact with the impeller by mixing air while the ultra-fine water droplets, the ultra-fine water droplets mixture air through the separator, to separate a large water microdroplets than the particle diameter 0.5 [mu] m, air 1 m ³ per 0.5 It is intended to obtain mixed air of ultra-fine water droplets containing 50 million or more ultra-fine water droplets of not more than μm.

Further, the apparatus for producing ultra-fine water droplets includes an ultra-fine water droplet generator in which an impeller rotates at high speed to convey air and a water supply hole, and the water supply hole in the impeller of the ultra-fine water droplet generator. A water feeder for supplying water at a pressure of -0.20 to 3.5 kg / cm ² through a gauge pressure of -0.20 to 3.5 Kg / cm2; It consists of a separator to separate off the water droplets, air 1 m ³ per 0.5
It is intended to obtain mixed air of ultra-fine water droplets containing 50 million or more ultra-fine water droplets of not more than μm.

[Action]

According to the above configuration, water is measured at a gauge pressure of -0.20 to 3.5 kg / cm.
^By supplying to the impeller rotating at high speed in ² to create ultra-fine water droplets and removing water droplets of 0.5 μm or more through the separator,
Air containing 50 million or more ultra-fine water droplets of 0.5 μm or less per m ^{3 of} air can be obtained.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of an apparatus for producing ultra-fine water droplets to which the method of the present invention is applied. In the figure, reference numeral 1 denotes an apparatus for producing ultra-fine water droplets. The apparatus 1 for producing ultra-fine water droplets comprises a turbine fan 4 (an ultra-fine water droplet generating apparatus) having an impeller 2 rotating at high speed to convey air and a water supply hole 3. ) And a gauge pressure of 0.02 to 3.5K through the water supply hole 3 to the impeller 2 of the turbine fan 4.
a pump 5 (water feeder) for supplying water at a pressure of g / cm ² ,
A cyclone 6 (separator) that separates and removes fine water droplets having a particle diameter of 0.5 μm or more in the mixed air of ultra-fine water droplets generated by the impact of the impeller 2 with water and air, and a cyclone 6 located below the cyclone 6. It comprises a water tank 7 for storing a certain amount of water.

The above devices are connected as shown in the figure.

That is, the outlet 8 of the turbine fan 4 is connected to the supply port 9 of the cyclone 6 by the duct 10. A discharge port 11 provided at an upper part of the cyclone 6 is connected to a suction port 13 of the turbine fan 4 via a clean room 12. The drain port 14 of the cyclone 6 is connected to the water tank 7 in a sealed state. A water supply pipe 15 for supplying fresh water from the outside is connected to the water tank 7, and a hole tap valve 16 is attached to the water supply pipe 15 so that the level in the water tank 7 becomes lower than a certain level. In some cases, fresh water is supplied automatically. This water tank 7
Is connected to the delivery side of the pump 5. The suction side of the pump 5 is connected to the water supply hole 3 of the turbine fan 4 via a flow control valve 17.

The turbine fan 4 rotates at a high speed, for example, 5,000 to 3
The rotation speed is preferably higher when the diameter of the impeller 2 is small, and the rotation speed may be low when the diameter is large. That is, the peripheral speed of the impeller 2 only needs to be equal to or higher than a predetermined speed, for example, 20 m / sec or higher. The shape of the impeller 2 of the turbine fan 4 is not particularly limited, but a material that does not corrode with water is preferable. The casing 18 of the turbine fan 4 is provided with a water supply hole 3. The water supply hole 3 is provided near the suction port 13. That is, water is more easily supplied near the suction port 13.

The pump 5 is not particularly limited as long as a predetermined amount of water and a predetermined pressure are satisfied. However, the material is preferably one that does not produce rust and the like, and a one-sided suction centrifugal pump is usually used. Although the amount of water supplied to the turbine fan 4 depends on the capacity of the clean room 12 and the like, a pump having a sufficient capacity is usually selected, and the amount of water supplied is adjusted by the flow control valve 17. When the water supply hole 3 is provided near the suction port 13 of the turbine fan 4, the pump 5 may not be necessarily provided. That is, if the turbine fan 4 has a suction pressure, it may be directly connected to the water tank 7.
For example, it may be −0.2 kg / cm ^{2 to 0} kg / cm ² .

The cyclone 6 removes fine water droplets having a predetermined diameter or more, and an appropriate diameter and length are selected according to the particle diameter of the fine water droplets contained in the air. In the present invention, 0.5μ
Those that remove fine water droplets having a particle size of m or more are selected.
In addition, the material which does not show rust etc. is used.

The water tank 7 has a function of receiving the water droplets separated by the cyclone 6 and supplying the water to the turbine fan 4 again, and the water is gradually contaminated by the circulating action in the clean room 12 or the like. Alternatively, it has a function of continuously changing water.

Next, the method of the present invention will be described with reference to the ultrafine water droplet producing apparatus 1 having the above configuration.

First, after confirming that predetermined conditions are satisfied, the turbine fan 4 is rotated. Next, the flow control valve 17 is closed, the pump 5 is rotated, and the flow control valve 17 is gradually opened to supply water at a predetermined water amount. The flow-regulated water is
When the turbine fan 4 collides with the high-speed rotating impeller 2, ultra-fine water droplets are instantaneously generated and mixed with the air sucked from the inlet 13, and the supply of the outlet, the duct 10 and the cyclone 6 is performed. It enters the cyclone 6 tangentially through the mouth 9. The air mixed with ultra-fine water droplets forms a swirling flow in the cyclone 6, and fine water droplets having a large particle size, that is, 0.5 μm or more, hit the inner peripheral wall surface of the cyclone 6, travel down the inner peripheral surface as it is, and go downward, through the drain port 14. Enter tank 7. Ultra-fine water droplet mixed air of 0.5 μm or less is supplied into the clean room 12 from the outlet 11 of the cyclone 6. In this mixed air, ultra-fine water droplets having a particle size of 0.5 μm or less are 1 m ³
More than 50 million are contained per. Again, the air is supplied from the suction port 13 to the turbine fan 4. Hereinafter, the circulation operation is performed.

The ultra-fine water droplets thus obtained are reduced in size to substantially ultra-fine water droplets of 0.5 μm or less, and the air is supplied by containing more than 50 million per 1 m ^{3 of} air. Not only fine dust in the air, but also bacteria,
Filamentous fungi and spores, as well as viruses, can be adhered and cleaned and eradicated. Furthermore, in an air atmosphere in which such ultra-fine water droplets are floated, not only can air be cleaned, but in the case of ultra-fine water droplets, the phenomenon that an object does not get wet despite the presence of water droplets does not occur. Has a noticeable effect. Therefore, when ordinary air is passed through the mixed air of ultra-fine water droplets, the ordinary air is highly purified to an ultra-clean state, and the highly purified air is supplied to each room and home. It can be directly applied to dust removal, bacteria elimination, deodorization, humidity control, etc. in refrigerators and other related parts.

FIG. 2 is a schematic configuration diagram showing a case where the method of the present invention is embodied in a clean room.

That is, the air mixed with ultra-fine water droplets coming out of the supply port 11 of the cyclone 6 is adjusted by the temperature / humidity controller 20 and is blown into the clean room 12 from the blower port 21 in the upper part of, for example, a hospital room. This ultra-fine mixed air is circulated through a clean room 12 such as a hospital room, and after dust removal, sterilization, deodorization, and humidity control, exhausted from an exhaust port 22 provided at a lower portion, impurities are removed by a filter 23, and turbines are removed. The air is supplied to the suction port 13 of the fan 4. Here, the water supplied from the pump 5 collides with the impeller 2 of the turbine fan 4, and ultrafine water droplets are instantaneously generated again, pass through the cyclone 6, and large water droplets are removed. Used for circulation.
Note that the other configuration and operation are the same as those in FIG. 1, and a description thereof will be omitted.

〔The invention's effect〕

As described in detail above, according to the method for producing ultra-fine water droplets of the present invention, water is supplied to the impeller rotating at high speed during air conveyance at a gauge pressure of −0.20 to 3.5 kg / cm ^2. , Water is made into ultra-fine water droplets by the impact with the impeller and mixed with air, and the ultra-fine water droplet mixed air is passed through a separator to a particle size of 0.5μ.
separating the larger water microdroplets than m, 0.5 [mu] per air 1 m ³
It is possible to obtain air mixed with ultra-fine water droplets containing 50 million or more of ultra-fine water droplets of m or less. Accordingly, it is possible to easily produce ultra-fine water droplets of 0.5 μm or less, and it is possible to simplify the generation mechanism. In addition, ultra-fine water droplets of 0.5 μm or less generated by the method of the present invention have extremely low surface tension, and adhere to objects, and ultra-fine water droplets easily adhere to dust floating in the air. The ultra-fine water droplets gather and grow together, significantly increasing the weight, and the dust is removed together with the blast. In addition, since ultra-fine water droplets are used, not only humidity control, but also very fine dust, bacteria, viruses, and odor components can be removed, and indoors can be physically and biologically used. Has the effect of being cleaned. Viruses were conventionally removed with an air filter, etc.
Since it was only 1 μm in size, it was impossible to remove it sufficiently with an air filter. Therefore, if the inside of the room is cleaned using the method of the present invention, the possibility of actually catching a cold is greatly reduced, and it is extremely suitable for use in hospitals, pharmacies, laboratories, maternity clinics, home refrigerators and the like. .

Further, according to the ultra-fine water droplet producing apparatus of the present invention, the apparatus configuration is simplified, each apparatus can be made simple and compact, and the whole apparatus can be made extremely small. Can be significantly smaller than conventional ones.

For this reason, the installation space can be extremely narrowed, and each device can be simply reduced in size, so that it is possible to reduce the cost.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a block diagram of an apparatus for producing ultra-fine water droplets to which the method of the present invention is applied, and FIG. 2 is a schematic configuration diagram showing a case where the method of the present invention is embodied in a clean room. It is. DESCRIPTION OF SYMBOLS 1 ... Ultrafine water droplet manufacturing apparatus 2 ... Impeller 3, Water supply hole 4 ... Turbine fan (Ultrafine waterdrop generator) 5 ... Pump (Water supply machine) 6 ... Cyclone (Separator)

Claims (2)

(57) [Claims] 1. An impeller rotating at a high speed while conveying air is supplied with water at a gauge pressure of -0.20 to 3.5 kg / cm ² , and the water is turned into ultra-fine water droplets by impact with the impeller. The air is mixed with the air, and the ultra-fine water-droplet mixed air is passed through a separator to separate fine water-droplets having a particle diameter of more than 0.5 μm.
A method for producing ultrafine water droplets, characterized by obtaining an air mixture of ultrafine water droplets containing 50 million or more ultrafine water droplets of 0.5 μm or less per m ³ . 2. An ultra-fine water droplet generator having an impeller rotating at high speed to convey air and a water supply hole, and a gauge pressure applied to the impeller of the ultra-fine water droplet generator via the water supply hole. A water feeder for supplying water at a pressure of −0.20 to 3.5 kg / cm ² ,
The impeller and the impact particle size 0.5μm or more water microdroplets ultrafine water droplets mixed in the air generated by the water consists of a separator to separate off, 50 million the following ultrafine water droplets 0.5μm per air 1 m ³ An apparatus for producing ultra-fine water droplets, characterized in that a mixed air of ultra-fine water droplets containing at least two or more pieces is obtained.