JPH0790144B2 - Deodorizing method and device - Google Patents

Description

The present invention relates to an odor deodorizing method and apparatus.

[Conventional technology]

Conventionally, for deodorizing odors, there are filters using activated carbon and a deodorizing exhaust gas purifying device disclosed in JP-A-58-76125.

The filter deodorizes an odor by adsorbing odor molecules of the odor by the adsorption force of activated carbon.

The deodorizing exhaust gas purification device presses exhaust gas containing pollutant molecules (odor molecules) into the cylindrical body in its tangential direction, and while the exhaust gas is turning inside the main body, fine water droplets are directed toward it. It is a device for deodorizing odors by ejecting the polluted molecules to collide with the water droplets to combine them and separate them from the gas by the action of centrifugal force.

[Problems to be solved by the invention]

 The above conventional technique has the following problems.

1) In the case of a filter using activated carbon, the filter is apt to be clogged and maintenance is difficult, and there are disadvantages such as pressure loss due to the filter. Further, there is a limit to the adsorption power and use capacity of the activated carbon, and the activated carbon is expensive and the cost is high.

2) In the deodorizing exhaust gas purification device, pollutant molecules are combined with water droplets. This is the combination of odor molecules adsorbed by particles such as dust and water droplets, or odor molecules that dissolve in water droplets. , It does not decompose odor molecules. Therefore, it is impossible to deodorize odors other than water-soluble ammonia, and the deodorizing ability is considerably low. In addition, an odor was emitted from the water droplets bound to the contaminant molecules, which caused secondary contamination.

The present invention solves the above problems, and provides a low cost deodorizing method and apparatus with excellent deodorizing ability.

[Means for solving problems]

The present invention is configured as follows to solve the above problems.

1) A deodorizing method is characterized in that an odor and ozone gas are introduced into a cyclone, a gas derived from the cyclone is introduced into a cyclone scrubber, and the gas derived from the cyclone scrubber is dehumidified.

2) A deodorizing device comprising a cyclone that receives an odor, a cyclone scrubber that communicates with the cyclone, a dehumidifier that communicates with the cyclone scrubber, and an ozone generator that supplies ozone gas into the cyclone. .

[Action]

 The present invention operates as follows with the above configuration.

The odor introduced into the cyclone comes into contact with ozone gas in the cyclone and is decomposed, sterilized and deodorized by the ozone gas, and the cyclone removes dust in the odor.
The odor and ozone gas derived from the cyclone and introduced into the cyclone scrubber come into contact with the particles of spray water in the cyclone scrubber, and the particles contain odor molecules, decomposed odor molecules, and fine dust. Dissolved and adsorbed, ozone gas is dissolved in the particles to sterilize the particles,
Deodorize. The particles are separated from the gas by the cyclone scrubber. The gas introduced into the dehumidifying cyclone derived from the cyclone scrubber is dehumidified by the dehumidifying cyclone.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

1 is a schematic view of an apparatus for explaining an embodiment of the present invention, FIG. 2 is a front sectional view of a cyclone according to the embodiment of the present invention, and FIG. 3 is a plan view of the cyclone according to the embodiment of the present invention. It is a figure.

As shown in FIG. 1 of the drawings, a deodorizing device A is a blower 1 for sending an odor from an odor source that produces an odor to a cyclone B, a cyclone B that receives the odor, and a cyclone scrubber C that communicates with the cyclone B. It consists of a dehumidifier D that communicates with the cyclone scrubber C and an ozone generator E that supplies ozone gas into the cyclone B. Further, since two cyclone scrubbers C were used, they consisted of a cyclone scrubber C ₁ and a cyclone scrubber C ₂ .

The blower 1 is connected to an odor source by a pipe 1a, and is connected to a cyclone B introduction pipe 3 via a pipe 1b. As the blower, it is preferable to use a roots blower capable of quantitatively transferring odor.

As shown in FIGS. 1, 2 and 3, the cyclone B has a spherical main body 2 for separating particles of gas and solids such as dust and particles of liquid such as water, and particles into the main body 2. An introduction pipe 3 for introducing a gas containing the gas, a discharge pipe 4 for discharging the gas separated from the particles inside the main body 2 to the outside of the main body 2, and an exhaust pipe for discharging the particles separated from the gas inside the main body 2 to the outside of the main body 2. It consists of a tube 5.

The main body 2 has a two-divided structure that is half-divided from the center, and is composed of a hemispherical upper part 2a and a hemispherical lower part 2b. The open end of the upper part 2a and the open end of the lower part 2b are attached to form a ring shape. The packing 6 and the link band 7 having a substantially U-shaped cross section make the upper part 2a and the lower part
2b is fixed.

The introduction pipe 3 is provided on the outer peripheral surface of the upper portion 2a of the main body 2, and the outlet pipe 3 is provided so as to extend from the upper portion of the upper portion 1a of the main body 1 toward the inside in the center direction of the main body 1. The discharge pipe 5 is provided at the bottom of the lower portion 1b of the main body 1, and a valve 8 is provided below the discharge pipe 5, and the valve 8 is connected by a pipe 9 to a container such as dust (not shown).

The outlet pipe 4 is connected to the cyclone scrubber via the pipe 10.
It is connected to the inlet pipe 12 of C ₁ .

This cyclone B operates and acts as follows.

The gas containing particles introduced into the main body 2 from the introduction tube 3 by a blower or the like becomes a spiral spiral flow that descends while swirling along the inner wall of the main body 2, and during this time centrifugal force acts on the particles. The particles move toward the wall of the main body 2 and are separated from the air flow. The separated particles are discharged from the discharge pipe 5 to the outside of the main body 2 through the valve 8. In the spiral spiral flow, the spiral becomes larger from the upper part to the lower central part, and the flow velocity decreases. Further, the diameter of the spiral becomes smaller and the flow velocity increases as it goes downward from the central portion, and an ascending air current is generated in the center and is discharged from the outlet pipe 4 to the outside of the main body 2.

Since the spiral spiral flow as described above is generated due to the shape of the main body 2, the pressure loss of the main body 2 is small, and a high flow velocity can be obtained in the upper and lower portions, so that particles that cannot be separated in the upper portion are separated in the lower portion. And the ability to separate twice allows separation even with a large number of particles in the gas, better than using a cylindrical cyclone.

The cyclone scrubber C ₁ is the cyclone B described above.
It is equipped with a sprayer in the main body 11, inlet pipe 12, outlet pipe 13,
It consists of a discharge pipe 14 and a sprayer 15.

The sprayer 15 comprises a spray nozzle 15a for spraying fine water particles to the center of the main body 11 and a pump 15b for supplying water to the spray nozzle. The pump 15b and the spray nozzle 15a are pipes 15c.
The pump 15b and a water source (not shown) are connected by a pipe 15d.

An automatic valve 16 is provided below the outlet pipe 14, and a liquid level sensor 17 is provided inside the main body 11.

The liquid level sensor 17 is composed of an upper float switch 17a and a lower float switch 17b.When the liquid level rises, the upper float switch 17a operates to open the automatic valve 16, and when the liquid level falls, the lower float switch 17b opens. When activated, the automatic valve 16 is closed to prevent water sprayed in the main body 11 from accumulating in the main body 11.

The automatic valve 16 is connected to a container for water or the like (not shown) through a pipe 18.

The outlet pipe 13 of the cyclone scrubber C ₁ is connected via a pipe 17 to an inlet pipe 21 of the cyclone scrubber C ₂ .

The cyclone scrubber C ₂ is similar to the cyclone scrubber C ₁ and has a spray nozzle 25 branched from a main body 20, an introduction pipe 21, a discharge pipe 22, a discharge pipe 23, and a pipe 15c of the sprayer 15.
And the upper float switch 26a and the lower float switch 2
6b and a liquid level sensor 26, and an automatic valve 24 provided below the discharge pipe and operated by the liquid level sensor 26. The automatic valve 24 is connected to a container (not shown) such as water by a pipe 27. There is.

The outlet pipe 22 of the cyclone scrubber C ₂ is connected to the inlet pipe 30 of the dehumidifier D via a pipe 28.

In the cyclone scrubber C, the sprayed water particles collide with the particles in the air stream to increase the particle size and facilitate separation.

The dehumidifier D is a cyclone B provided with a cooling device, and includes a main body 29, an introduction pipe 30, an outlet pipe 31, a discharge pipe 32, and a cooling device 33.

The cooling device 33, the pipe 33a is wound around the outer peripheral wall of the main body 29, is connected to the cooler 33b and the pipe 33c and the pipe 33d, the main body 29 is cooled by the refrigerant from the cooler to prevent moisture in the main body 29. Dehumidify.

A valve 34 is provided below the discharge pipe 32, and the valve 34 is connected by a pipe 35 to a container for dehumidifying water (not shown).

The ozone generator E is a device for generating ozone gas, and exchanges air with ozone gas by silent discharge. Since NO _X is generated depending on the air converted to ozone gas, the converted air is preferably -60 ° C dry air. Therefore, the heatless air dryer 36 and the filter 37 are used.
The heatless air dryer 36 is a twin cylinder that is tightly filled with a desiccant having a strong affinity for moisture.

The filter 37 and the heatless air dryer 36 are connected by a pipe 38, the heatless air dryer 36 and the ozone generator E are connected by a pipe 39, and the ozone generator 5 and the cyclone B are connected.
Are connected by a pipe 40. The air that is converted into ozone gas uses outside air, and the outside air is dust-removed by the filter 37 and sent to the heatless air dryer 36. The heatless air dryer 36 makes dry air at -60 ° C and sends it to the ozone generator E. The ozone generator E turns it into ozone gas and sends it to the cyclone B. Further, when an enzyme is used as a raw material instead of the outside air (general air), the ozone generation amount is doubled and NO _x is not generated, which is effective, and the heatless air dryer 36 becomes unnecessary.

The odor is deodorized by the deodorizing apparatus A of this embodiment as follows.

The odor from the odor source is sent to the cycle B via the blower 1, and the ozone gas from the ozone generator E is also sent to the cyclone B. The odor introduced into the cyclone B contacts the ozone gas while swirling in the cyclone B, and is decomposed, sterilized and deodorized by the ozone gas,
Particles such as dust in the odor are separated from the air stream by the cyclone B and removed. The odor and ozone gas derived from the cyclone B are introduced with the cyclone scrubber C ₁ . The gas introduced into the cyclone scrubber C ₁ comes into contact with the water particles sprayed by the sprayer 15 while swirling in the cyclone scrubber, and the water particles have a molecule of odor such as water solubility and sulfur separated by ozone gas. Molecules of odors such as the system and fine dust not separated by cyclone B are dissolved and adsorbed, ozone gas is dissolved in the water particles to sterilize and deodorize the water particles, and the water particles are Separated from the air flow by the body 11 of the cyclone scrubber C ₁ . The gas derived from the cyclone C ₁ is a cyclone scrubber.
Introduced in C ₂ . The gas introduced into the cyclone scrubber C ₂ acts in the same manner as the cyclone scrubber C _1, and the water particles from the spray nozzle 25 are further bonded to the water particles in the gas to form the water particles in the gas. Increases diameter and facilitates separation from airflow. The gas derived from the cyclone scrubber C ₂ is introduced into the dehumidifier D. Dehumidifier D
The gas introduced into is cooled while swirling, and the water particles that could not be separated by the cyclone scrubber C ₂ are separated and dehumidified. The gas discharged from the dehumidifier D is a discharge pipe.
It will be released into the atmosphere from 31. As described above, the deodorizing device A can perform not only deodorizing but also sterilization, dust removal and the like.

Odor was deodorized using the deodorizer A. The conditions are shown below, the results are shown in Table 1, and the rule criteria are shown in Table 2.

Conditions Ozone gas 2g / hr Amount of spray water 12 / hr Cooling temperature 21 ℃ Atmosphere temperature 31 ℃ Cyclone diameter 450mm Inlet pipe diameter Φ27mm Outlet pipe diameter Φ35mm Blower flow rate 20 / sec Maximum flow velocity in cyclone about 30m / sec As shown in Table 1, the rule criteria of Table 2 were cleared, and good results were obtained. Also, the odor concentration was measured by the three-point comparison odor bag method, and good results were obtained.

The embodiment of the present invention has the following unique effects due to the above configuration.

The deodorizing device A is made more compact by using four spherical cyclone bodies than a cyclone body having a cylindrical diameter, and since it has less pressure loss, it can be operated by a blower with a small air volume. It is economical. Furthermore, there is no need for maintenance, and automation is possible.

The present invention is not limited to the above-described embodiment. For example, if the odor is corrosive, the blower is likely to be damaged. Therefore, a vacuum pump may be provided in the outlet pipe 31 of the dehumidifier D. When the odor contains a large amount of moisture, it is better to dry the odor using a heater cyclone in which a heater is provided in the cyclone B.

〔The invention's effect〕

The present invention has the following effects due to the above configuration. There is no need to use a filter that uses activated carbon, and there is no clogging by the filter or pressure loss. In addition, the cost is low and the cost is low. And since it also deodorizes odors and spray water with ozone gas, it has excellent deodorizing ability,
There is a great effect that secondary pollution does not occur.

[Brief description of drawings]

1 is a schematic view of an apparatus for explaining an embodiment of the present invention, FIG. 2 is a front sectional view of a cyclone according to the embodiment of the present invention, and FIG. 3 is a plan view of the cyclone according to the embodiment of the present invention. It is a figure. A: Deodorizer, B: Cyclone C: Cyclone scrubber D ... Dehumidifier E ... Ozone generator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B04C 9/00 7112-4D

Claims (2)

[Claims] 1. A deodorizing method comprising introducing an odor and ozone gas into a cyclone, introducing a gas derived from the cyclone into a cyclone scrubber, and dehumidifying the gas derived from the cyclone scrubber. 2. A deodorant comprising a cyclone that receives an odor, a cyclone scrubber that communicates with the cyclone, a dehumidifier that communicates with the cyclone scrubber, and an ozone generator that supplies ozone gas into the cyclone. apparatus.