JPH08229340A - Wet type air cleaner - Google Patents

Abstract

PURPOSE: To obtain a wet type air cleaner for indoor use which is used for many purposes and is small in size and is inexpensive and is low in maintenance cost and also is easy to control by constituting it of a nonwoven fabric filter part, an alkaline washing part, an alkaline water regenerating part, acid washing part and a dewatering part. CONSTITUTION: This cleaner consists of a nonwoven fabric filter part A consisting of plural active carbon beds packed with active carbon in a bag body made of nonwoven fabric of about 2-10μm texture, an alkaline washing part B for subjecting alkaline water solution and polluted air to gas-liquid contact, an alkaline water regenerating part C for regenerating the alkaline water solution which has absorbed the contaminants with the alkaline washing part B, an acid washing part D for subjecting air after alkaline washing and organic acid water solution to gas-liquid contact, and a dewatering part E for dewatering purified air after purification. In this way, various kinds of the contaminants are removed with high efficiency. Since the alkaline water regenerating part is incorporated, maintenance cost is low and control is easy. Since the constitution is relatively simple and small in size, the device is inexpensive and does not require much space, and is suitable for domestic use or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet air purifier, and more particularly to an indoor wet air purifier comprising a nonwoven fabric filter section, an alkali cleaning section, an alkaline water regenerating section, an acid cleaning section and a draining section. .

[0002]

2. Description of the Related Art In recent years, concerns about air pollution have only deepened, and various air purifiers have been proposed and used as countermeasures against them. These are classified into a filter type general type and an electric high-grade type. Broadly divided.

In order to remove dust, bacteria, smoke, etc., the filter type combines three types of filters, usually a pre-filter, a high-performance filter and a deodorizing filter, by the suction force of a fan. , A deodorizing filter, a germicidal lamp, etc. are combined.

The pollutants in the air differ from region to region, and some measures have been taken sufficiently, but NOx and SO, which are exhaust gases of personal cars, especially diesel cars.
x, COx, etc. are not expected to improve the environment for the time being in places with heavy traffic in urban areas.

[0005] In addition, seasonal air pollution represented by cedar pollen is a heavy burden on people with allergies, and it is necessary to wear a special mask. In addition, measures against unpleasant malodorous components such as mercaptan, hydrogen sulfide, ammonia, etc., especially for indoor use such as hospitals and nursing elderly people's rooms,
Development of a compact and inexpensive indoor air purifier that is versatile for removing formed components such as gas components, dust, pollen, malodorous components, nicotine, smoke components, etc. is awaited.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to harmful gas components in polluted air, formed components such as dust and pollen, malodorous components,
The present invention proposes an indoor warm air purifier that can be used for multiple purposes such as removal of nicotine and smoke components, is small, inexpensive, has low maintenance cost, and is easy to manage.

[0007]

SUMMARY OF THE INVENTION The present invention is based on weaves 2-10.
A non-woven fabric filter part composed of a plurality of activated carbon layers filled with activated carbon in a bag made of non-woven fabric of μmm, an alkali cleaning part for bringing an alkaline aqueous solution into contact with contaminated air in gas-liquid contact, and an alkali absorbing contaminants in the cleaning part It is characterized by comprising an alkaline water regenerating section for regenerating an aqueous solution, an acid cleaning section for bringing an organic acid aqueous solution into contact with air after the alkaline cleaning in gas-liquid contact, and a cyclone type draining section for draining clean air after cleaning. And a wet air purifier.

In the above, the alkali cleaning section and the acid cleaning section are provided with an alkali aqueous solution or an acid aqueous solution distributor, a gas-liquid contact section composed of a multi-stage inclined plate for gas-liquid contact, and a circulation for storing a liquid after absorbing contaminants. Preferably, it is composed of a liquid storage tank with a pump, and the alkaline water regenerating section is composed of a heating section and a heat exchanging section, and the heating section has a built-in heater,
It is preferable that heat transfer fins are attached to the pipes in the heat exchanger of the heat exchange section.

The present invention is constructed as described above, is capable of removing various pollutants with high efficiency, and has a built-in alkaline water regenerating unit, so that maintenance costs are low and management is easy. Further, since the structure is relatively simple and small, the manufacturing cost is low, the space is small, and it is suitable for household use.

[0010]

Next, each part constituting the present invention will be described. (A) The non-woven fabric filter part is composed of a plurality of flat activated carbon layers having a small air flow resistance filled with granular activated carbon having good air permeability in a bag made of a non-woven fabric of 2 to 10 mm.
Pollen, diesel exhaust carbon particles, cigarette smoke particles, etc. are removed to prevent clogging of each cleaning part described later. If necessary, a mesh plate of about 0.5 mm size for removing relatively coarse dust may be provided in front of the activated carbon layer.

(B) The alkaline cleaning section brings the alkaline aqueous solution into contact with contaminated air and absorbs NOx, SOx, COx, mercaptan, hydrogen sulfide and the like.

Renewable Na ₂ is used as the alkaline substance.
Using CO ₃ , Na ₂ CO ₃ is dissociated in water to become Na ₂ CO ₃ + H ₂ O → NaOH + NaHCO ₃ ... (1), and exhibits an alkaline property around pH 10.5. As pollutants in polluted air existing in the city, COx mainly composed of CO ₂ is about 1 to 0.02%, and other components are p.
p. m. Or P. P. B. Units, so the alkali consumption is mostly consumed by COx.

(C) The alkaline water regenerating section comprises a heating section and a heat exchanging section. A part of the alkaline aqueous solution circulated in the alkaline cleaning section is extracted, and the residual heat of the heating section is first used for heat exchange. , 30 to 40 ° C., and then flown into the heater heating section and heated to 60 to 80 ° C., sodium bicarbonate (NaHCO ₃ ) vaporizes CO ₂ by the formula (2), and Na ₂ CO ₃ aqueous solution. To be played. NaHCO ₃ → Na ₂ CO ₃ + CO ₂ ↑ + H ₂ O (2)

The vaporized CO ₂ is induced outside the system (outdoor),
Remove. The temperature rise due to heating is heat-exchanged in the heat exchange section and the gas-liquid contact section, and is naturally cooled.

(D) The acid cleaning section uses a malodorous organic acid such as malic acid or citric acid as an acid substance, and makes gas-liquid contact with alkali-cleaned air as an acid aqueous solution.
Absorbs and removes ammonia components and amine components. When sterilization is required, iodine is added.

(E) Above (A), (B), (C),
The clean air containing water washed in (D) is finally sucked by the blower and introduced into the cyclone-type water draining section, the separated water droplets are returned to the cleaning section, and the clean air is released indoors.

Next, an embodiment of the present invention will be described with reference to the drawings. However, the wet air purifier according to the present invention is not limited to the following embodiments.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a flow chart showing the function of a wet air purifier according to the present invention, FIG. 2 is an explanatory overall sectional front view showing an example of a wet air purifier according to the present invention, and FIG. XX sectional view, FIG. 4 is a YY sectional view of FIG. 2, FIG. 5 is an explanatory perspective view showing a main part of a gas-liquid contact portion in the present invention, and FIG. 6 shows a cyclone type draining portion in the present invention. It is an explanatory perspective view.

The wet air purifier according to the present invention is a box having a substantially rectangular shape, and has a non-woven fabric filter section A, an alkaline cleaning section B, an alkaline water regenerating section C, which have the above-mentioned functions therein.
The acid cleaning section D and the cyclone-type draining section E are compactly built in.

The non-woven fabric filter part A has a rectangular section in one side (the right side in the figure) of the box body in the longitudinal direction of the box and is formed in a duct shape in the upper half, and 1 is a part of the filter part A. With a contaminated air suction port provided toward the outside of the upper part, a 0.5 mm mesh mesh blade 2 for dust removal as shown in FIGS. 1 and 2 is stretched over the entire suction port 1 at the suction port 1. Removes relatively coarse dust.

Reference numeral 3 denotes a plurality of activated carbon layers (two layers in the figure) formed in a rectangular flat shape by filling a breathable granular activated carbon into a bag made of a non-woven fabric having a texture of 2 to 10 μm.
3 are laid on the filter part A in parallel with each other with a slight gap therebetween as shown in FIG. 3, and the contaminants introduced from the suction port 1 are filtered.

There are a plurality of alkali cleaning parts B (4 in the figure).
Liquid distributor 4 and a multi-stage gas-liquid contact plate 5a are combined to form a gas-liquid contact portion 5 (four in the figure), a liquid collecting plate 6, and a circulation pump 9 with a switching valve (shared) and It is composed of a liquid circulation storage tank 7.

The liquid distributor 4 is a perforated plate box type container, and as shown in FIG. 2, a plurality of liquid distributors 4 (four in the figure) are arranged on the same plane above the box of the alkali cleaning section B at equal intervals. Therefore, the alkaline aqueous solution fed through the liquid feeding pipe 8 by the circulation valve-equipped circulation pump 9 provided at the bottom of the box is sprayed onto the gas-liquid contact portion 5. The liquid distributor is not limited to the above type, and may be appropriately designed and determined.

The gas-liquid contact portion 5 is composed of a gas-liquid contact inclined plate 5a having a substantially L-shaped cross section as shown in FIG. The contaminated air introduced downward from the non-woven fabric filter portion A is redirected upward by the liquid collecting plate 6 to form a gap between the lower part of the gas-liquid contact slant plate 5a and the slant plate 5a. Is dispersed and rises by the above, and is contacted with the alkaline aqueous solution distributed and dispersed from the upper liquid distributor 4 in an alternating-current manner for alkali cleaning.

The cleaned air passes through the communication port 19 of the partition 18 whose upper part is opened and is introduced into the next acid cleaning section (D).

The liquid collecting plate 6 is formed in an inverted cone shape or an inverted polygonal pyramid shape, and a liquid outlet is provided at the lower end, and the peripheral edge portion is on the three outer walls of the alkali cleaning section B and the partition wall 18. After being fixed internally, the alkali-cleaned liquid from the gas-liquid contact portion 5 is collected and made to flow into the liquid storage tank 7 provided at the bottom.

The liquid storage tank 7 is formed in a square cross section by the four side walls of the alkali cleaning section B and is provided at the bottom of the box below the liquid collection plate 6 and is connected to the circulation pump 9 with a switching valve. A liquid sending pipe 8a is continuously provided.

The alkaline aqueous solution is sent to the liquid distributor 4 via the liquid supply pipe 8 by the circulation valve 9 with a switching valve, sprayed by the distributor 4, and exchanged with the contaminated air from below at the gas-liquid contact section 5. After making contact with the formula, the liquid is collected by the liquid collecting plate 6 and flows into the liquid storage tank 7. Thus, the alkaline aqueous solution is constantly circulated while the alkaline cleaning section B is operating.

In the alkaline water regenerating section C, as shown in FIG. 4, a heating section 12 and a heat exchanging section 13 are arranged side by side in the upper part of the box, and the box between the alkali cleaning section B and the acid cleaning section D is arranged. It is provided in the center of the body, and the heating unit 12 has a built-in heater.

Further, in the heating section 12, a plurality of baffle plates 20 are divided into a plurality of communicating chambers as shown in FIG. Shaped to maintain.

A part of the alkaline aqueous solution circulated in the alkali cleaning section B is extracted by the circulation pump 9 with a switching valve through the liquid feed pipe 8 and the flow rate adjusting valve 10, and first, the residual heat of the heating section is used to generate heat. After exchanging and preheating to 45 to 55 ° C., the CO ₂ absorbed by the alkaline aqueous solution is vaporized and separated by flowing into the heating unit 12 and heating to 60 to 80 ° C., and according to the formula (2). Na ₂ C
Regenerate the O ₃ aqueous solution. The vaporized CO ₂ gas is
It is released to the outside of the system from a CO ₂ outlet 21 provided in the upper part of the heating unit 12.

The heat exchanging section 13 arranged in parallel with the heating section 12 is the same as a normal heat exchanger, and the liquid feed pipe 8c connected to the circulation pump 9 with a switching valve and the baffle plate 20 are shown in FIG. As shown in FIG. 3, the heating unit 12 is arranged in the same manner, and heat transfer fins are attached to the liquid supply pipe 8c.

A part of the alkaline aqueous solution circulated in the alkaline cleaning section B is extracted by the pump 9 into the liquid feeding pipe 8c, and the regenerated alkaline aqueous solution from the heating section 12 is circulated in an alternating manner for heat exchange. It is introduced into the liquid inlet of the heating unit 12.

In this case, the regenerated alkaline aqueous solution heated to about 60 to 80 ° C. by the heating section 12 is heated by the heat exchange section 13.
Is heat-exchanged to lower the temperature to about 40 ° C., and then flows into the liquid storage tank 7 from the outlet 22. On the other hand, the alkaline aqueous solution in the liquid supply pipe 8c is heated to about 45 to 55 ° C. and circulated to the heating unit 12.

As described above, the CO ₂ absorbed in the alkaline cleaning section B is vaporized in the alkaline water regenerating section C and discharged to the outside of the system, and the regenerated alkaline aqueous solution is circulated to the alkaline cleaning section B. is there.

A circulation pump 9 with a switching valve is provided at a substantially central portion of the bottom of the box, and a liquid supply pipe 8 for circulating and supplying liquid to the alkali cleaning section B and a liquid volume adjusting valve 10 branched from the liquid supply pipe 8. It is possible to switch between the liquid feed pipe 8C for feeding to the alkaline water regenerating unit C and the liquid feed pipe 8d for feeding to the acid cleaning unit D via this, and one pump can feed liquid in three directions. 8a
Is a suction pipe for an alkaline aqueous solution, and 8b is a suction pipe for an acidic aqueous solution, which can be appropriately switched.

As shown in FIG. 2, the acid cleaning section D is connected to the alkali cleaning section B via the alkaline water regenerating section C, and the internal structure thereof is substantially the same as that of the alkali cleaning section B. Liquid distributor 4 ', gas-liquid contact portion 5'formed by combining multi-stage gas-liquid contact plate 5a, liquid collecting plate 6', circulation pump with switching valve 9 (shared) and liquid circulation storage liquid It is composed of a tank 7 '.

The liquid distributor 4 ', the gas-liquid contact portion 5', the liquid collecting plate 6 ', the circulation pump 9 with a switching valve, the liquid circulation storage tank 7', etc. are the same as those described in the alkali cleaning section B above. Since the structure is similar, the description is omitted.

The air cleaned in the alkali cleaning section B is sucked by the blower 14 through the communication port 19, then introduced into the acid cleaning section D, and is contacted with the acid aqueous solution in the gas-liquid contact section 5'in an alternating manner. Then acid washed.

The acid aqueous solution is circulated in the acid cleaning section D in the same manner as the alkaline aqueous solution described above to absorb and remove contaminants.

Since the amount of pollutants that are acid-cleaned in the contaminated air is very small, a part of the acid-cleaning solution may be appropriately taken out of the system and replenished with a new acid aqueous solution after operating for a certain period of time.

The insides of the non-woven fabric filter portion A, the alkali cleaning portion B, and the acid cleaning portion D, which constitute the wet air purifier of the present invention, are constantly sucked by the blower 14 provided above the acid cleaning portion D to be negative. The pressure is maintained, and the contaminated air is sucked and introduced to be cleaned in each cleaning unit, and the clean air is released from the exhaust port 16 to the room through the next drainer E.

The drainer 17 is formed in a cyclone type as shown in FIG. 6, and finally guides the flow of clean air in the circumferential direction to separate water drops in the clean air and return them to the cleaning section.

In the above embodiment, the wet air purifier provided with the non-woven fabric filter part A, the alkali cleaning part B, the alkaline water regenerating part C, the acid cleaning part D and the water draining part E has been explained. The cleaning section D may be omitted.

With the small wet air purifier constructed as described above, polluted air (CO: 6 ppm, C
O ₂ : 0.05%, NO ₂ : 10 ppm, organic thiol: 0.01%) as a result of the cleaning test,
The composition of the final clean air is CO: <0.01 ppm, CO
₂ : <0.0001%, NO ₂ <0.01 ppm, organic thiol: <0.0001%.

[0046]

Since the air purifier of the present invention is constructed as described above, it has the following effects. (1) Formed components such as gas components, dust and pollen, malodorous components,
Various pollutant components such as nicotine and smoke components can be removed with high efficiency. (2) Since it has a built-in alkaline water regeneration unit, maintenance costs are low and management is easy. (3) Since the life of the alkaline aqueous solution has no problem because the alkaline water regenerating section is built in, the alkali consumption of other NOx, SOx, etc. is on the order of PPM or PPB.
The effect can be sustained for about a year and a half by driving 8 hours a day,
No maintenance is required due to overhauling. (4) A bactericidal effect can be expected by adding iodine to the washing aqueous solution. (5) Since it is relatively small, it can be widely used as an indoor room such as a room at home, a room for the elderly with care, a patient room, a private room karaoke, and a high-paying bar.

[Brief description of drawings]

FIG. 1 is a flow diagram of a wet air purifier according to the present invention.

FIG. 2 is an explanatory sectional front view showing an embodiment of a wet air purifier according to the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken along line YY of FIG.

FIG. 5 is an explanatory perspective view showing a main part of a gas-liquid contact portion according to the present invention.

FIG. 6 is an explanatory perspective view showing an outline of a cyclone-type drainer according to the present invention.

[Explanation of symbols]

 1-Contaminated Air Suction Port 2-Mesh Blade 3-Activated Carbon Layer 4-Liquid Distributor 5-Gas-Liquid Contact 6-Liquid Collection Plate 7-Liquid Storage Tank 8-Liquid Transfer Pipe 9-Circulation Pump with Switching Valve 10-Liquid Volume control valve 11-Power supply chamber 12-Heating part 13-Heat exchange part 14-Blower 15-Suction port 16-Opening port 17-Draining part 18-Partition wall 19-Communication port 20-Baffle plate 21-COx discharge port 22- Alkaline aqueous solution outlet 23-Heater A-Nonwoven fabric filter part B-Alkali cleaning part C-Alkaline water regenerating part D-Acid cleaning part E-Cyclone type draining part F-Air flow direction G-Liquid flow direction

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[Procedure amendment]

[Submission date] December 21, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet air purifier, and more particularly to an alkaline cleaning section and an alkaline water regenerating section.
As necessary, non-woven fabric filter part, acid cleaning part
The present invention relates to an indoor temperature type air purifier configured by combining at least a part of a drainage part and a drainage part .

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

[Means for Solving the Problems] The first invention is
Alkaline cleaning unit that brings the aqueous solution into contact with the contaminated air
And re-use the alkaline aqueous solution that has absorbed the contaminants in the cleaning section.
Moisture characterized by consisting of a regenerated portion of live alkaline water
An expression air purifier, the second invention, a plurality of activated carbon layer
The non-woven fabric filter part and the alkali cleaning part and
Wet air comprising an alkaline water regenerating section
A third aspect of the present invention is a non-woven fabric filter.
Section, alkaline cleaning section, alkaline water regeneration section, and
Acid for contacting air after liquid cleaning with organic acid aqueous solution
A cleaning section and a draining section that drains clean air after cleaning
To provide a wet air purifier characterized by comprising
It is. 1st and 2nd invention WHEREIN: If necessary, a draining part
May be added .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

As the alkaline substance, NaOH, Na
₂ CO ₃ , NaHCO ₃ , KOH, K ₂ CO ₃ , KHC
O ₃ or the like can be used, but, for example, Na ₂ CO ₃ was used.
In this case, Na ₂ CO ₃ is decomposed in water to become Na ₂ CO ₃ + H ₂ O → NaOH + NaHCO ₃ ... (1), and exhibits alkalinity around pH 10.5. As pollutants in polluted air existing in the city, COx mainly composed of CO ₂ is about 1 to 0.02%, and other components are p.
p. m. Or p. p. b. It is an order.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction content]

[0044] In the above embodiment, the nonwoven filter section A, alkali washing unit B, alkaline water reproduction unit C, and was described wet air purifier having an acid cleaning section D and dewatering unit E, contaminants in the contaminated air Depending on the type and amount of
Lucari cleaning section B and alkaline water regeneration section C only or non-woven fabric
Filter part A, alkaline cleaning part B, alkaline water regeneration part
A wet air purifier consisting of only C may be used, if necessary.
A drainer may be added .

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 53/34 ZAB B01D 53/34 ZABA 53/81 ZAB F24F 7/00

Claims (4)

[Claims] 1. A non-woven fabric filter part comprising a plurality of activated carbon layers in which a non-woven fabric bag having a weave of 2 to 10 μm is filled with activated carbon, an alkali cleaning part for bringing an aqueous alkali solution into contact with contaminated air in a gas-liquid manner, An alkaline water regeneration unit that regenerates an alkaline aqueous solution that has absorbed pollutants in the cleaning unit, an acid cleaning unit that brings the organic acid aqueous solution into contact with air after the alkaline cleaning, and a cyclone that drains clean air after cleaning. A wet air purifier comprising a mold drainer. 2. The alkali cleaning section comprises an alkaline aqueous solution distributor, a gas-liquid contact section composed of a multi-stage inclined plate for gas-liquid contact, and a liquid storage tank with a circulation pump for storing the liquid after absorbing contaminants. The wet air purifier according to claim 1, which is configured. 3. The alkaline water regenerating unit comprises a heating unit and a heat exchange unit, a heater is built in the heating unit, and heat transfer fins are attached to pipes in the heat exchanger of the heat exchange unit. The wet air purifier according to claim 1 or 2. 4. The acid cleaning section comprises an acid aqueous solution distributor, a gas-liquid contact section composed of a multi-stage inclined plate for gas-liquid contact, and a storage tank with a circulation pump for storing the liquid after absorbing contaminants. The wet air purifier according to claim 1, wherein the wet air purifier is configured.