JPH0670505B2 - Water-cleaning air purifier, sterilizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is directed to a bioclean room, in which indoor air containing dust and bacteria is circulated between a washing tower to remove dust and bacteria to remove air. The present invention relates to a water-washing type air purifying and sanitizing device for cleaning.

[Conventional technology]

Bio-clean rooms used in food manufacturing, pharmaceutical manufacturing, and medical fields require dust removal as well as sterilization function against airborne microorganisms due to the need for sterilization of the indoor environment and biohazard. As a sterilizing device, a water-washing type was adopted, which adopted a washing tower to remove and sterilize suspended dust and bacteria in the treated air by its washing and collecting action, and sterilize the collected bacteria with ozone. Air purification,
A disinfection device has already been proposed in JP-A-62-69033.

Next, a conventional system of the water-cleaning type air cleaning and sterilizing apparatus described above with reference to FIG. 2 will be described. In the figure, 1 is a bioclean room, 2 is a blower, and 3 is a water washing tower. Between the air intake port 11 and the air supply port 12 of the bioclean room 1, there is an air circulation blower via the blower 2 and the water washing tower 3. The path 4 is formed. On the other hand, the flush tower 3 has a water tank 31 at its bottom.
And an eliminator for removing drops on the upper part of the ventilation passage in the tower.
32, and a sprinkling nozzle 33 are provided so that the water pumped from the water receiving tank 31 to the sprinkling nozzle 33 via the pump 34 is sprayed from the sprinkling nozzle 33 to the ventilation passage in the tower. Further, the water receiving tank 31 is provided with an ozone diffusing pipe 51 which is immersed in water and connected to an external ozonizer 5. Reference numeral 35 is a drain cock for draining water.

In order to remove dust and sterilize the air in the bioclean room 1 with such a configuration, first, ozone generated by the ozonizer 5 is diffused into the water in the water receiving tank 31 in the water washing tower 3 through the ozone diffusing pipe 51, and the water in the water receiving tank 31 is stored. While dissolving and absorbing ozone in the water, the water in the water receiving tank 31 is sprinkled from the sprinkling nozzle 33 into the ventilation passage in the tower, and in this state, the blower 2 is operated to treat air containing dust and bacteria sucked from the bioclean room 1. Is blown into the tower through a duct opening on the side surface of the water washing tower 3.

As a result, the treated air stream A receives the spray of the water shower B ejected from the water nozzle 33 in a countercurrent manner in the process of rising and ventilating the inside ventilation passage of the washing tower 3, and the dust floating in the treated air,
In addition, bacteria and the like adhering to the dust are taken into the water droplets by the washing and dust collecting action of the water shower, separated and collected, and the treated air stream A is dedusted and sterilized. Further, the air purified by the water washing tower 3 is subjected to water drop removal by the eliminator 32, and then is recirculated and released into the room through the air supply port 12 of the bioclean room 1. On the other hand, the shower water in which dust and bacteria are collected is repeatedly used so as to be settled in the tower by its own weight and collected in the water receiving tank 31, and then supplied again to the water spray nozzle 33 via the pump 34. Moreover, ozone C supplied from the ozonizer 5 through the ozone diffuser 51 is dissolved and absorbed in the water of the water receiving tank 31, and the bacteria collected in the water shower react with ozone-absorbed water to rapidly sterilize it. To be done.

[Problems to be Solved by the Invention]

However, the above-mentioned conventional apparatus has the following problems in terms of dust removal and sterilization efficiency of treated air.

That is, in order to improve the dust removal and sterilization efficiency in the process of countercurrently ascending the treated air flow A in the washing tower 3, the contact ratio between the treated air flow A and the water shower B, and It is necessary to increase the relative velocity of collision, but if the water droplets of the water shower sprayed from the water spray nozzle 33 are made fine to increase the contact rate, it becomes easy to be affected by the process air flow A rising in the tower, The particles rise in the tower along with the air flow while collecting dust, bacteria, etc., and the proportion of the particles that escape from the water washing tower 3 increases.

In addition, as a measure to prevent such water shower water droplet particles from escaping from the tower, the wind speed of the treated air flow A passing through the tower is lowered, and the wind speed distribution in the tower is made uniform to bring the water shower into contact with the average. However, in order to reduce the wind speed in the tower, it is necessary to enlarge the cross section of the ventilation passage in the washing tower in order to process the same amount of air, and the washing tower equipment becomes larger accordingly. To do. Moreover, even in this case, with the conventional structure, the dynamic pressure of the treated airflow A pushed into the tower from the side has a great influence on the wind speed distribution in the tower, and a uniform wind speed distribution cannot be obtained. The expected dust removal and sterilization effects cannot be obtained. Therefore, an attempt was made to arrange a windbreak plate in the tower to make the wind velocity distribution uniform in the tower.However, if a windbreak plate is provided, the internal structure becomes complicated and equipment costs increase, and bacteria adhere to the windbreak plate. As a result, a new problem arises, and maintenance work such as cleaning the air conditioning plate becomes necessary, which makes maintenance work difficult.

The present invention has been conceived in view of the above points, by modifying the introduction path of the treated air flow into the washing tower, while homogenizing the wind speed distribution in the tower without the need of a windbreak plate. It is another object of the present invention to provide a water-washing type air cleaning / sterilizing apparatus capable of further improving the dust removing / sterilizing effect.

[Means for Solving the Problems]

In order to solve the above problems, in the device of the present invention,
The open end of the in-tower outlet duct for the treated air, which is piped in the water washing tower, is arranged so as to be closer to the water surface of the water receiving tank from above.

[Action]

In the above structure, the outlet duct opens at a vertical angle or an angle close to a vertical angle with respect to the water surface of the water receiving tank, and the distance between the opening end and the water surface is at least smaller than the duct diameter dimension. It is opening close to. By blowing the treated air through the blowing duct into the washing tower with such a configuration, the air blown from the blowing duct vigorously hits the water surface of the water receiving tank, where coarse particles of dust contained in the treated air, And bacteria adhering to the dust are first collected so as to be taken into the water in the water receiving tank in the previous stage where they are washed and dust-collected by the water shower in the latter stage, and at the same time the bacteria are sterilized with ozone dissolved in water. It

Moreover, the introduced air flow blown into the tower from the air blow duct hits the water surface, whereby the dynamic pressure of the electric flow is changed to static pressure. Therefore, the direction of air flow is reversed from here and the air velocity of the airflow rising in the tower air passage is made uniform, and therefore the spraying of the water shower spouting from the sprinkling nozzles on the way of ventilation in the tower causes the washing and dust collection effect. The dust and bacteria remaining in the air stream will be efficiently secondarily collected,
As a result, a comprehensively high dust removal and sterilization effect can be obtained.

〔Example〕

FIG. 1 shows a system diagram of an embodiment of the present invention, and the same portions corresponding to FIG. 2 are denoted by the same reference numerals. First, in the illustrated embodiment, an independent ozone dissolving tank 6 is installed in juxtaposition with the water washing tower 3, and a circulation water passage 62 including a pump 61 is provided between the ozone dissolving tank 6 and the water receiving tank 31 of the water washing tower 3.
An ozone diffusing pipe 51 connected to the ozonizer 5 is provided at the bottom of the ozone dissolving tank 6 through communication. Reference numeral 63 is an exhaust ozone treatment device connected to the top of the ozone dissolving tank 6. Here, while water is circulated between the ozone dissolving tank 6 and the water receiving tank 31 of the water washing tower 3, the ozone generated by the ozonizer 5 is diffused into the water of the ozone dissolving tank 6 through the ozone diffusing pipe 51. During the process in which ozone is dissolved and absorbed, and the ozone-absorbed water is circulated and sent to the water receiving tank 31 of the water washing tower 3, the bacteria separated and collected from the treated air stream are sterilized. Reference numeral 7 is a chirig unit that cools the water stored in the water receiving tank 31, and serves to cool the water in order to increase the ozone absorption rate in the water.

According to the present invention, the air blow-out duct 8 connected to the discharge port of the blower 2 and drawn into the inside of the washing tower 3 by the present invention
Is arranged so that its open end 81 approaches the surface of the stored water stored in the water receiving tank 31 in a direction substantially vertical from above and faces the surface of the stored water. The water level of the water receiving tank 31 is adjusted so that the distance between the open end 81 of the duct 8 and the water surface is at least smaller than the duct diameter dimension.

With the above configuration, the treated air flow A introduced by being pushed into the water washing tower 3 from the bio clean room 1 through the blower 2.
First, in the process of blowing into the tower through the air blowing duct 8, the water surface of the water receiving tank 31 is vigorously hit, and in this process, coarse particles of dust contained in the treated air, bacteria attached to the dust, etc. It is taken up by and is primarily collected, and the bacteria are sterilized here with ozone dissolved in water. On the other hand, when the treated air flow A blown from the duct 8 hits the water surface, the dynamic pressure of the air flow changes to static pressure, and the air flow whose air flow direction is reversed from here rises in the air passage in the tower with a uniform wind velocity distribution. Ventilation is carried out, and in the course of this ventilation, the water shower sprayed from the sprinkling nozzle 33 flows countercurrently to make sufficient contact with each other. Therefore, the dust and bacteria remaining in the air stream are effectively secondarily collected by the washing and collecting action of the water shower. The dust and bacteria collected by the shower water settle in the tower and are collected in the water receiving tank 31, where they are sterilized by ozone, and the pump 33 is used again.
And is supplied to the water spray nozzle 32.

In the illustrated embodiment, the ozone washing tank 6 is attached to the water washing tower 3 and ozone is supplied thereto. However, as shown in FIG. 2, the ozone is directly supplied to the water receiving tank 31 of the water washing tower 3. It is needless to say that the same effect can be obtained by configuring the air blowing duct as shown in the illustrated embodiment even for the configuration in which the air is diffused.

Further, in the embodiment shown in FIG. 1, an electric dust collector 9 is installed between the air outlet 11 of the bioclean room 1 and the blower 2. This electrostatic precipitator 9 replaces the pre-filter used in the conventional device, and in the conventional pre-filter, the filter is contaminated during long-term operation to deteriorate the dust removal function, or the bacteria adhered to the filter. However, maintenance work was required to replace the filter regularly. In this respect, by installing the electric dust collector 9 in place of the pre-filter as described above, the treated air flow can be pre-dust-removed with almost no maintenance, and the washing tower 3 reduces the dust-removal load and is stable for a long period of time. You will be able to perform the required driving.

〔The invention's effect〕

Since the water-cleaning type air cleaning / sterilizing apparatus of the present invention is configured as described above, it has the following effects.

That is, the opening end of the air outlet duct of the treated air flow that is pushed into the water washing tower is arranged closer to the water surface of the water receiving tank from above, so that the front stage of the washing and dust collecting operation by the water shower is performed. , The dust and bacteria in the air stream are primarily collected in the water of the water receiving tank while the treated air flow blown from the air blowing duct hits the water surface of the water receiving tank, and then it reverses in the air blowing direction and rises in the tower. The wind velocity distribution of the flowing air flow becomes uniform. Therefore, it is possible to obtain comprehensively high dust removal and sterilization efficiency together with the secondary collection of dust and bacteria by the latter-stage water shower spraying.

[Brief description of drawings]

FIG. 1 and FIG. 2 are system diagrams of an embodiment of the present invention and a conventional water-washing type air cleaning and sterilizing apparatus, respectively. In each figure, 1: bio clean room, 2: blower, 3: water washing tower, 31: water receiving tank, 33: water spray nozzle, 5: ozonizer, 51: ozone diffusing pipe, 8: air blowing duct, A: treated air flow, B: water shower,
C: Ozone.

Claims (1)

[Claims] 1. A water washing tower having a water spray nozzle at the top of the tower and a water receiving tank at the bottom, and ozone supply means for diffusing and absorbing ozone from the outside into the stored water of the water receiving tank. In order to remove dust and bacteria, the treated air containing dust and bacteria is pushed into the ventilation passage of the washing tower to blow air, and a water shower is sprayed countercurrently from the water spray nozzle into the treated air. In the water-cleaning type air cleaning and sterilizing device, the water-cleaning type air cleaning and sterilizing device is characterized in that the opening end of the in- tower blowing duct for the treated air is arranged closer to the water surface of the water receiving tank from above. Bacteria device.