JPH09313873A - Removing device of dust and odor in gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dust and odor removing device with high recovery efficiency by combining water spray type humidity control tower, a gas cleaning device, and an ultrafine particle collector, etc. SOLUTION: Contaminated gas is sucked from an introduction port of the water spray type humidity control tower with a suction force of a fan when the fan is worked and is washed in the water spray type humidity control tower and flows in the gas cleaning device. Since the inflow air becomes faster in the flow speed at a venturi part 3 and the pressure drops, the mist generated at a mist generation device 7 is sucked to the venturi part 3, mixed with the contaminated gas, and absorbs the odor of the gas and the contamination substance such as dust. Next, the mist absorbed this contamination substance is fed to the ultrafine particle collection device 11 in the downstream, and is recovered by the liquid droplets from the nozzle 13 during it flows in a long and zigzag flow path. The mist is efficiently recovered even by the liquid droplets sticking to the partitioning wall 12 or the confronting wall at that time and the gas is cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust and odor removing device capable of efficiently removing dust and odor contained in a gas by a charged mist and water droplets sprayed from a nozzle.

[0002]

2. Description of the Related Art An electrostatic precipitator has been well known as a device for purifying dust, corrosive gas or odorous gas. This dust collector is one in which dust that is floating in the gas is charged by corona discharge and the dust that is charged by the dust collecting electrode is adsorbed and removed, and it has been widely put into practical use. However, this electrostatic precipitator requires regular maintenance of the dust collecting electrodes,
It takes time to maintain the electrodes. In addition, a high voltage source is required for discharging, and it is necessary to give sufficient consideration to safety during use. Furthermore, there are many problems such as insufficient removal of odors in the gas and unsatisfactory aspects in use effect.

Separately from this, a device has also been proposed in which the mist supplied from the mist generator is brought into contact with a contaminated gas and the corrosive substance contained in the gas is dissolved in the mist to be removed. (See JP-A-51-13379). The above device is also inconvenient in practical use because it cannot efficiently collect dust and odor contained in the gas.

[0004]

From such a background, the inventors of the present invention have earnestly developed a simple polluted gas purifying apparatus which can efficiently purify corrosive and odorous gases and has good maintainability. As a result, a venturi is continuously formed at the introduction part that feeds the polluted gas, the negative pressure generated here is used to suck in the mist, and while mixing with the polluted gas, the pollutant is adsorbed to the mist and the polluted gas is purified. Succeeded in developing a new gas purifier. This gas purifier has a very simple structure, yet high dust collection efficiency,
In addition, it is a highly practical gas purification device that does not require special maintenance.

However, the subsequent studies revealed problems in practical use, such as difficulty in controlling the mixing ratio of the mist and the pollutants present in the gas with this device alone. With further development, the above-mentioned gas purification device, ultra-fine particle capture device that can remove dust and odor in the gas by the droplets sprayed from the nozzle while passing through a long flow path, and a sprinkler type humidity control that can clean the polluted gas By combining it with a tower, we succeeded in developing a device that can more efficiently remove dust and odor contained in gas. An object of the present invention is to propose a dust and odor removing device with high recovery efficiency by combining the above-mentioned water spray type humidity control tower, gas purifying device, ultrafine particle capturing device and the like.

[0006]

The technical solution adopted by the present invention is a sprinkler type humidity control tower for cleaning gas containing dust and odor, and means for introducing gas containing dust and odor. A venturi portion formed continuously with the means, and a mist generating device for generating a mist capable of absorbing dust and odor,
A gas purifying device including a flow path connecting the venturi portion and a mist generating device, a jumbled flow path capable of changing the flow direction of gas by a partition wall provided in the flow path, and the flow A device for removing dust and odor in a gas, which is a combination of an ultrafine particle capturing device provided with a nozzle capable of spraying a liquid on a wall surface of a main body where a gas collides, facing the flow of the gas,

[0007] A means for introducing gas containing dust and odor, a venturi portion formed continuously with the introduction means, a mist generator for generating mist capable of adsorbing dust and odor, and the venturi portion and the mist. A gas purifying device having a flow path connecting a generator, a jumbled flow path capable of changing the flow direction of the gas by a partition wall provided in the flow path, and a main body with which the flowing gas collides. A device for removing dust and odor in a gas, which is obtained by combining an ultrafine particle capturing device having a nozzle capable of spraying a liquid on a wall surface so as to face the flow of the gas.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments according to the present invention will be described below. First, each of the gas purifying device, the ultrafine particle capturing device, and the water spray type humidity control tower constituting the present invention will be described, and then the overall configuration of the device will be described.

[Gas Purifying Device] FIG. 1 is a conceptual side sectional view as one embodiment of a gas purifying device constituting the present invention. In the figure, reference numeral 1 denotes a gas flow passage as a gas introduction means which is a main part of the gas purifier, and a gas suction fan 2 is attached to an inlet of the gas flow passage 1. The fan 2 has a function of sucking and introducing a corrosive or odorous gas into the gas flow passage 1. A venturi portion 3 having a small flow passage cross-sectional area is formed in the middle of the gas flow passage 1 in a continuous manner. Reference numeral 4 denotes a purified gas discharge port formed on the other side of the gas flow passage 1, which can be connected to a suction port of an ultrafine particle capturing device described later or the like, if necessary.

The venturi portion 3 is formed with an opening 5 for allowing the mist to flow in, and the opening 5 is connected to a flow path 6 formed of, for example, a hose. A liquid storage unit 8 accommodating a mist generator 7 is connected to the other end of the flow path 6. The mist generator and the venturi portion can be directly connected without using a hose as long as the mist can be sucked by using the negative pressure of the venturi portion.

The mist generator 7 is provided with an ultrasonic oscillator, and when the ultrasonic oscillator is operated in the liquid stored in the liquid storage section 8, a uniform mist can be obtained. Since this mist is made into ultrafine particles, its adsorption surface area is large and it is charged due to the Leonard effect and the like. Therefore, in this gas purification apparatus, the pollutants in the polluted gas are adsorbed by the charged mist, and the dirt and odor are removed. Further, the mist that has adsorbed odors and the like falls downward by its own weight and is collected by a collection device (not shown).

As the ultrasonic oscillator, a commercially available device can be used, and the liquid misted by the ultrasonic oscillator can be various liquids (for example, liquids mixed with a cleaning agent) according to the polluted gas. Alternatively, an alkaline liquid or the like suitable for neutralizing the polluted gas) can be used, and the liquid storage unit 8 can be supplied with a liquid to be mist by an appropriate means.

[Ultrafine Particle Capture Device] FIG. 2 is a conceptual plan sectional view as an embodiment of the ultrafine particle capture device constituting the present invention. In the figure, 11 is a main body of an ultrafine particle capturing apparatus, and a large number of partition walls 12 are provided in the main body 11, and one end side of the partition walls is alternately opened to open a zigzag flow as shown in the figure. The road is formed. In the zigzag flow path, at least one nozzle 13 capable of spraying liquid droplets is provided on each of the walls (walls of the main body) on which gas collides so as to face the flow of gas.

The opening a formed in the partition wall 12 is
The size is such that it is not affected by the droplets from the nozzle that spreads in a fan shape, and specifically, the outer locus of the droplets that spread in a fan shape in FIG. 2 and the axis of the partition wall that is on the downstream side with respect to the flow. Is the length up to the point where
Is set as a distance at which droplets from the nozzle collide with the opposite wall surface and have a sufficient rebounding force. By doing so, the droplets of the nozzle are sufficiently attached to the entire surface of the partition wall, and an uneven water film is more likely to be formed on the opposing wall surface, so that there is an opportunity for the droplets to come into contact with dust or odorous substances in the gas. As the number increases, the chances of contact between the bounced liquid droplets and dust or odorous substances also increase, and the efficiency of collecting dust or odors can be improved.

In this ultrafine particle capturing device, when the mist adsorbing dust or odor passes through the flow path, the mist can be captured by the droplets sprayed from the nozzle to purify the gas, and further dust or the like can be collected. The adsorbed droplets drop downward by their own weight and are collected by a collecting device (not shown). In addition, a fan for sucking gas may be provided at an appropriate position also in this ultrafine particle capturing apparatus, and the liquid to be sprayed may be a liquid suitable for the contaminated gas. it can.

[Sprinkling Type Humidity Control Tower] FIG. 3 is a conceptual side sectional view as an embodiment of the water sprinkling type humidity control tower constituting the present invention.
In the figure, reference numeral 15 is a main body of a water spray type humidity control tower, and this main body 15 is configured as a closed space, and a polluted gas inlet 16 is provided at the bottom thereof, and a cleaned gas outlet 17 is provided at the top thereof. Are formed. An appropriate number of water spray nozzles 18 are provided on the ceiling of the main body, and the amount of water spray from the nozzles can be adjusted via a flow valve (not shown). In this humidity control tower, the polluted gas is washed with water by passing the polluted gas through the nozzle, and the cleaned gas is discharged from the outlet while the polluted water is discharged from the bottom of the main unit to the outside of the unit. It can be discharged to. The amount of water sprayed from the water spray nozzle can be appropriately changed depending on the state of the contaminated gas, and the contaminated gas can be washed in the optimum state. In addition, a fan for sucking gas may be provided in the humidity control tower as necessary.

Next, a description will be given of an embodiment of a device for removing dust and odor in a gas, which is a combination of the above components, and FIGS. 4 to 7 are configuration diagrams of the first to fourth embodiments.

[First Embodiment] This example is characterized in that the above-mentioned water spray type humidity control tower, gas purifying apparatus, and ultrafine particle capturing apparatus are arranged as shown in FIG. In order to purify the polluted gas using this device, the water sprinkling type humidity control tower and the ultrafine particle capturing device are operated, and further, in the gas purification device, the mist generating device 7 (ultrasonic oscillator) is operated and removed. A liquid suitable for adsorbing the substance to be adsorbed is formed into a mist. Here, the mist in the gas purification device becomes uniform super-particles to increase the adsorption surface area and is charged by the Leonard effect or the like.

When the fan 2 attached to the gas flow passage of the gas purifying apparatus is operated in the above-mentioned state, the contaminated gas is sucked from the inlet 16 of the water spray type humidity control tower by the suction force of the fan. And washed in a water spray type humidity control tower,
It flows into the gas purifier. The gas flowing into the gas purification device has a high flow velocity and a reduced pressure in the venturi portion 3, so that the mist generated in the mist generating device is sucked into the venturi portion 3 and mixed with the polluted gas, where the mist is in the gas. Adsorbs pollutants (smell and dust). The mist that has adsorbed the contaminants is sent to the ultrafine particle capturing device disposed further downstream, and is captured and collected by the droplets sprayed from the nozzle while flowing through the long flow path in the ultrafine particle capturing device. Further, while flowing through the flow path, the droplets attached to the partition wall, the droplets bounced back by colliding with the opposing wall, and the like are also attached to perform efficient recovery. Then, the cleaned gas is discharged to the outside of the device.

As described above, in the present embodiment, the water spray type humidity control tower for the primary cleaning of the polluted gas, and the gas cleaning device for mixing the primary cleaned gas with the mist generated by the ultrasonic oscillator 7 are provided. Since it is configured in combination with the ultrafine particle capturing device that captures the mist that has adsorbed the pollutant, it is possible to efficiently purify the polluted gas. In addition, since each component is unitized, it is easy to handle. Furthermore, in the gas purification device, maintenance of the mist generator (ultrasonic oscillator) can be easily done simply by removing the hose from the venturi section. It has advantages such as being able to.

[Second Embodiment to Fourth Embodiment] In the above-described embodiments, the water spray type humidity control tower is used, but the second to fourth embodiments are used.
The embodiment is an example of an apparatus that can purify polluted gas without using the water spray type humidity control tower. There are various possible combinations of the gas purifying device and the ultrafine particle capturing device, and each is effective. For example, as in the second embodiment, the inlet of the ultrafine particle capturing device is connected to the outlet of the gas purifying device. Alternatively (see FIG. 5), the outlet of the ultrafine particle capturing device is connected to the inlet of the gas purifying device, and the inlet of the ultrafine particle capturing device is connected to the outlet of the gas purifying device as in the third embodiment. (See FIG. 6), the suction port of the ultrafine particle capturing device is connected to the exhaust port of the gas purifying device and the suction port of the gas purifying device is connected to the exhaust port of the ultrafine particle capturing device as in the fourth embodiment. (See FIG. 7), and a combination suitable for each polluted gas to be purified can be adopted. Further, in the second to fourth embodiments, the gas cleaning work after the gas cleaning in the water spray type humidity control tower in the first embodiment is carried out.

In addition to the above-mentioned respective embodiments, various combinations of a sprinkler type humidity control tower, a gas purifying device, and an ultrafine particle capturing device are possible, and a gas is in a dirty state or a mixed state of odor and dust. Therefore, it is desirable to change and use the above combination. The sprinkler type humidity control tower, the gas purifying device, and the ultrafine particle capturing device combined as described above are housed in a case (not shown) as necessary for easy handling.

Further, the sprinkler type humidity control tower, the gas purifying device and the ultrafine particle capturing device are unitized respectively, and the respective inlets and outlets are standardized, so that the units can be freely combined to join them. Can be selected. Further, the fan for sucking gas is not limited to the gas purifying device, and may be provided in at least one of the water spray type humidity control tower, the gas purifying device, and the ultrafine particle capturing device, and the fan is further arranged. It goes without saying that the location and the number of fans can be appropriately set in consideration of the gas flow and the like. The present invention can be embodied in various other forms without departing from the spirit or main characteristics of the present invention, and therefore, the above-described embodiments are merely exemplifications in all respects, and should be construed as restrictive. Don't

[0024]

As described in detail above, according to the present invention, since the pollutant gas is washed with water in the sprinkler type humidity control tower, soot or the like mixed in smoke or the like can be reliably captured. In the gas purification device, the mist can surely adsorb pollutants in the gas by using static electricity. In the ultra-fine particle capturing device, the nozzle is provided so as to face the flow of gas, that is, the movement of the mist adsorbing dust or odorous substance and the flow of the droplet sprayed from the nozzle are opposite, so that the moving droplet A vortex or the like is formed in the rear part of the mist, which makes it easier for the mist and the droplet to come into contact with each other, and the mist capture rate can be improved. In addition, the droplets from the nozzle spread, and those that reach the surrounding partition wall become droplets there, forming a thin water film with unevenness on the partition wall, and it is possible to efficiently capture the mist that collides with the wall. Can be fulfilled As a result, in the present invention, it is possible to efficiently purify a corrosive or odorous gas, and it is possible to efficiently collect dust and odorous substances mixed in the gas, and also form a mist. It can be applied to any polluted gas by changing the type of liquid. Further, by combining the device of the present invention with a conventional electrostatic precipitator or the like, it is possible to obtain excellent effects such as obtaining a more effective dust collecting effect.

[Brief description of drawings]

FIG. 1 is a side sectional view of a gas purification device according to the present invention.

FIG. 2 is a plan sectional view of an ultrafine particle capturing apparatus according to the present invention.

FIG. 3 is a side sectional view of a water spray type humidity control tower according to the present invention.

FIG. 4 is a configuration diagram of a first embodiment of a dust and odor removing device according to the present invention.

FIG. 5 is a configuration diagram of a second embodiment of a dust and odor removing device according to the present invention.

FIG. 6 is a configuration diagram of a third embodiment of a dust and odor removing device according to the present invention.

FIG. 7 is a configuration diagram of a fourth embodiment of a dust and odor removing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas flow passage (gas introduction means) 2 Fan 3 Venturi part 4 Mist recovery device 6 Flow path 7 Mist generation device 8 Liquid storage part 11 Ultrafine particle capturing device main body 12 Partition wall 13 Nozzle 15 Water sprinkling type humidity control tower main body 16 Inlet port 17 Discharge port 18 Sprinkling nozzle

Claims (4)

[Claims] 1. A sprinkler type humidity control tower for cleaning a gas containing dust and odor, a means for introducing a gas containing dust and odor, a venturi portion formed continuously with the introducing means, and a dust and odor. A mist generating device for generating a mist capable of adsorbing the gas, a gas purifying device comprising a flow passage connecting the venturi portion and the mist generating device, and a flow direction of gas by a partition wall provided in the flow passage. In a gas, which comprises an ultrafine particle capturing device comprising a gas flow path capable of changing the flow rate and a nozzle capable of spraying a liquid on the wall surface of the main body with which the flowing gas collides, facing the flow of the gas. A device for removing dust and odors. 2. A means for introducing gas containing dust or odor, a venturi portion formed continuously with the introduction means, a mist generator for generating mist capable of adsorbing dust or odor, and the venturi portion. And a mist generating device, and a gas purifying device that includes a flow path that connects the mist generating device, a flow path that allows the flow direction of the gas to be changed by a partition wall provided in the flow path, and the flowing gas that collides. A device for removing dust and odor in a gas, which is formed by combining an ultrafine particle capturing device having a nozzle capable of spraying a liquid on a wall surface of a main body facing a gas flow. 3. The ultrafine particle capturing apparatus comprises a zigzag flow path formed by alternately opening one end side of a partition wall in the main body, and a gas of the main body wall against which the gas collides in the flow path. A nozzle capable of spraying a liquid so as to face the flow, and further, the opening of the partition wall,
The size is set so as not to be affected by the droplets from the nozzles that spread in a fan shape, and the width L of the main body is set to a distance such that the droplets from the nozzles collide with the opposing wall surfaces and have a sufficient rebounding force. A device for removing dust and odor in a gas according to claim 1 or 2. 4. The gas according to claim 1, wherein at least one ultrafine particle capturing device is connected in series at least upstream or downstream of the gas purifier. Device for removing dust and odor inside.