JPH09206554A - Waste ozone treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an operational difficulty due to the weight of an ozone decomposing agent, etc., in the device when the activated carbon or an ozone decomposing agent is replaced from the waste ozone gas inlet side and to provide the waste ozone treating device without the periphery being contaminated with dust, etc. SOLUTION: Plural cartridges 18a, 18b, 18c and 18d each packed with activated carbon or an ozone decomposing agent are independently dischargeably laminated in a freely closable vessel main body 11 resistant to ozone, a gas feed hood 14 for introducing waste ozone gas is provided on one side of the main body 11, and an exhaust hood 16 for discharging the treated gas into the atmosphere is furnished on the other side to constitute the waste ozone treating device. A cylindrical body is cut in half in the longitudinal direction, the two halves are combined to constitute the main body 11, and the main body is made openable in the form of a door by a hinge. Further, a jack is provided to the side of the main body 11 to lift the cartridge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust ozone treating apparatus for detoxifying exhaust ozone gas generated in various water treatment facilities using ozone and releasing it into the atmosphere.

[0002]

2. Description of the Related Art In recent years, water pollution of rivers and lakes is advancing along with the deterioration of the water environment in urban areas. Only by combining conventional flocculation and sedimentation, sand filtration and chlorine treatment,
Currently, there are limits to the chromaticity and odor removal effects of raw water for tap water.

Pre-chlorination is generally adopted in order to cope with such deterioration of water quality of the water source, but it is known that an organic chlorine compound is generated in the water purification process adopting the pre-chlorination. Furthermore, there is a drawback that the mold odor and algae odor of the water source cannot be completely eliminated.

As a countermeasure against this, an ozone treatment or a combined treatment of the ozone treatment and activated carbon treatment is introduced in the operation process of purified water, and sterilization, decolorization, deodorization and harmful substances are made by utilizing the strong oxidizing power of ozone. An advanced water purification system for removing water is being considered.

[0005] and the ozone treatment is a method that utilizes a strong ozone O ₃ much oxidizing power than chlorine,
Ozone gas is blown into the water to be treated from the diffuser in the form of fine air bubbles, and by contact with the water to be treated, the offensive odor and chromaticity are removed, and the harmful substances are oxidized and removed.

Exhaust ozone gas that remains unabsorbed in the water to be treated is sent to a separately disposed exhaust ozone treatment device and decomposed to a level below the allowable concentration level so as not to affect the living body. . Ozone gas has a strong oxidizing power like fluorine and is harmful to the human body, so it cannot be released into the atmosphere as it is.Therefore, decomposition treatment in the exhaust ozone treatment tower is an essential step. ing.

In Japan, 0.1 ppm is applied as an allowable concentration for occupational health of ozone gas, and when relatively high concentration of ozone is used in a water treatment facility, the excess ozone not used in the decomposition reaction is It must be released to outside the treatment route below the allowable concentration, and the treatment route must be completely sealed, and the facility ventilation and ozone concentration monitoring system must be prepared.

At present water treatment plants, dissolved ozone dissolved in water among the above-mentioned surplus ozone is degassed by injecting air into the water by providing a deozone tank or the like in the latter stage. A means for releasing water after decomposing it by self-decomposition of ozone in a storage tank is adopted. For exhaust ozone released as gas, methods such as thermal decomposition, adsorption decomposition with activated carbon, decomposition using a catalyst, chemical decomposition with chemicals, etc. are used. Among them, adsorption decomposition using activated carbon is often used in Japan. Has been done.

This is because ozone is adsorbed in the pores of activated carbon,
Ozone is chemically decomposed by the following reaction. 2O ₃ + 2C → 2CO ₂ + O ₂・ ・ ・ ・ ・ ・ (1) 2O ₃ + C → CO ₂ + 2O ₃・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ (2) 2O ₃ + C → 3O ₂ + C ・ ・ ・ ・ ・ ・ ・ ・ (3) Above (1) The formula (2) is a chemical reaction and the activated carbon is also consumed at the same time, but the formula (3) is a catalytic reaction and the activated carbon is not consumed. Actually, ozone was adsorbed on activated carbon (1) ~
It is considered that the reaction of (3) is occurring, and therefore the activated carbon is consumed according to the amount of ozone.

Since all of the above reactions are exothermic reactions, there is a risk that activated carbon will ignite and burn due to a rapid reaction when a high concentration of exhaust ozone gas flows in. Therefore, when treating high-concentration exhaust ozone gas, an ozone decomposer formed by mixing powdered activated carbon with alumina silica gel to prevent sudden heat generation and combustion (for example, the product name is known as SECARD). Has been developed and used.

An example of a device using this product is shown in FIG.
As shown in (A), (B) and (C), a granular or pelletized ozone decomposing agent 2 (Secard) is filled in a container 1 having various shapes, and exhaust ozone gas 3 is supplied to one side of the container 1. The ozone is decomposed in the same manner as in the case of activated carbon by sending it through the ozone decomposing agent 2 through the introduction port provided in the. Since this ozone decomposer 2 changes color from black to white when it reacts with ozone gas, it has a feature that the replacement time can be clearly determined by installing a monitoring window in the container 1 in advance and monitoring the color change state. ing.

Further, when decomposing the exhaust ozone gas having a relatively low concentration, there is known an example of an apparatus in which the container 1 is filled with activated carbon in a granular or powder form which is cheaper than the ozone decomposing agent 2. . Further, recently, there is also an example of a device in which a manganese-based catalyst is molded into an ozone decomposing agent, which is filled in the container 1 to decompose ozone by utilizing a catalytic reaction.

[0013]

As described above, when activated carbon or the ozone decomposing agent is used for exhaust ozone treatment, the activated carbon or the ozone decomposing agent itself is decomposed and consumed when the exhaust ozone gas is decomposed by a chemical reaction. Because it will be done
At the time of continuous exhaust ozone treatment, it is necessary to replace the activated carbon filled in the container 1 or the ozone decomposer.

The ozone decomposition reaction occurs sequentially from the inflow side of exhaust ozone gas, and at the same time, activated carbon and the ozone decomposer itself are decomposed and consumed. Therefore, if the exchange work is performed from the inflow side of the exhaust ozone gas, the ozone decomposing effect can be restored without exchanging the total amount of the activated carbon or the ozone decomposing agent filled in the container 1. In particular, depending on the conditions of use, the amount of activated carbon or the ozone decomposing agent 2 used becomes large and the size of the apparatus also becomes large. Therefore, it is considered that the cost of the partial replacement is lower than that of the entire replacement at once. .

In most of the current exhaust ozone treatment apparatuses, half the amount of exhaust ozone gas is exchanged from the inflow side. However, in the case of a large-sized exhaust ozone treatment apparatus, the weight of activated carbon or an ozone decomposing agent is large, even if the amount is half. Therefore, in the case of the apparatus example shown in FIGS. 6 (A) and 6 (B), There is no choice but to take measures such as scraping off the depleted activated carbon or ozone decomposing agent from the exchange port provided on the inflow side of the exhaust ozone gas, and throwing in the activated carbon etc. to be exchanged from the top. There is a problem that the surroundings become dirty with soot and the like. Therefore, the exhaust ozone treatment device must be installed outside the room instead of indoors in the processing plant, which causes new problems such as securing a site for installation.

In view of the above, the present invention eliminates the operational difficulty caused by the weight of the activated carbon or the ozone decomposing agent in the apparatus in which the activated carbon or the ozone decomposing agent is exchanged from the inflow side of the exhaust ozone gas, and It is an object of the present invention to provide an exhaust ozone treatment device that does not pollute the surroundings with soot and dust.

[0017]

In order to achieve the above object, the present invention discharges the exhaust ozone gas generated in a water treatment facility into the atmosphere after detoxifying it by an activated carbon contact method or an ozone decomposing agent. According to claim 1, in the exhaust ozone treating apparatus, the cartridge is independently provided with a plurality of cartridges filled with activated carbon or an ozone decomposing agent inside the container body having the ozone resistance that can be opened and closed. An exhaust hood for accommodating and accommodating in a removable manner, an air supply hood for introducing exhaust ozone gas to one side of the container body, and an exhaust hood for releasing the treated gas into the atmosphere on the other side of the container body. The structure of the exhaust ozone treatment device is attached.

The container body is constructed such that two cylindrical objects cut in half in the longitudinal direction are combined and can be opened and closed like a door by a hinge. The upper surface and the lower surface of the cartridge are filled. The cartridge is made of a mesh having a mesh that does not allow the ozone decomposing agent to slip through, and each cartridge is provided with air permeability.

Further, according to a fourth aspect of the present invention, there is provided a structure in which a jack for lifting a cartridge one level above the cartridge to be taken out is provided on a side portion of the container body.
Thus, there is provided a configuration in which the container body is provided with a cartridge withdrawing guide for withdrawing each cartridge filled with the ozone decomposing agent.

According to such an exhaust ozone treatment apparatus, during normal operation, each cartridge is filled with activated carbon or an ozone decomposing agent, and then the cartridges are stacked and housed in the container body and completely sealed. Then, when the exhaust ozone gas is introduced from the air supply hood, the exhaust ozone gas passes through the activated carbon or the ozone decomposing agent filled in each cartridge to decompose ozone, and is discharged into the atmosphere via the exhaust hood.

When exchanging the ozone decomposing agent, the cartridge on the inflow side of the exhaust ozone gas is pulled out together with the cartridge, and another cartridge filled with a new ozone decomposing agent is newly replenished to the cartridge on the outflow side of the exhaust ozone gas. When replacing half of the ozone decomposing agent, one half cartridge is pulled out, and the other half cartridge filled with new ozone decomposing agent is replenished to the outflow side of the exhaust ozone gas. By performing such an operation, the ozone decomposing agent can be easily replaced without rolling up the dust.

In addition to the above-mentioned structure, by disposing a jack for lifting the cartridge on the side of the container body, the lower cartridge filled with the ozone decomposing agent can be easily taken out, and a guide for drawing the cartridge into the container body can be provided. By providing the above, any of the cartridges at each stage can be easily taken out when the ozone decomposing agent is replaced.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of an exhaust ozone treating apparatus according to the present invention will be described in detail below with reference to the drawings. The waste ozone treatment apparatus of the present invention stores a plurality of cartridges filled with activated carbon or an ozone decomposing agent in a container made of an ozone-resistant material such as stainless steel or Teflon, and the cartridge is provided with sufficient air permeability. It is a structural feature that the cartridge is exchanged from the inflow side of the exhaust ozone gas depending on the consumption state of the filled ozone decomposing agent while being maintained.

1 to 3 show a first embodiment of the present invention, and FIG. 1 is a front view showing a state in which a door of the apparatus is opened, and FIG.
Is a bottom view of the same, and FIG. 3 is a front view showing a state in which the door is closed. First, the structure of the apparatus will be described. Reference numeral 11 is a container body, and the material of the container body 11 is stainless steel (SUS304) having high ozone resistance. The container main body 11 is configured so that two cylindrical objects cut in half in the longitudinal direction are combined and can be opened and closed like a door by the hinges 12 and 12 shown in FIG.

When the container body 11 is opened and closed, the semi-cylindrical object on one side serves as the door 11a. A handle 20 for opening and closing is attached to the outer surface of the door 11a. Also, the container body 1
Screw holes 13, 13 for screwing the two cylindrical objects are opened at appropriate positions on the end surface along the longitudinal direction of 1.

An air supply hood 14 for introducing exhaust ozone gas is attached to the lower surface side of the container main body 11 through a packing 15, and the processed gas is exposed to the atmosphere on the upper surface side of the container main body 11. An exhaust hood 16 for discharging inside is attached via a packing 17. Then, inside the container body 11, cartridges 18a, 18b, 18c and 18d filled with an ozone decomposing agent are housed in a vertically stacked state. 22 and 22 are screw holes for connecting the container body 11 and the air supply hood 14.

Each of the cartridges 18a, 18b,
18c and 18d are made of stainless steel which is a material having high ozone resistance, and pull-out handles 21 and 21 are attached to the outer surfaces thereof, respectively. Further, the upper surface and the lower surface of each cartridge are formed of a mesh body so as to have air permeability. The mesh of this reticulate body has a size such that the filled ozone decomposing agent does not slip through, and the upper reticulate body has a removable structure so that the ozone decomposing agent can be easily taken out. Further, the lowermost cartridge 18d is mounted on the support plate 19 to the extent that it does not obstruct gas ventilation in order to maintain the lower space.

The inside of the air supply hood 14 and the exhaust hood 16 is formed with an inverted conical space and a conical space, and the gas flowing into the air supply hood 14 by this space is the lowest cartridge. It is devised so that the ozone decomposing agent filled in 18d is well distributed to the bottom surface and is smoothly discharged from the exhaust hood 16 into the atmosphere.

According to the exhaust ozone treating apparatus having the above structure, each cartridge 18a, 1
8b, 18c, and 18d are filled with an ozone decomposing agent, and then the cartridges are vertically stacked in the container body 11 as shown in FIG. By screwing both cylindrical objects constituting 11
Completely seal the inflowing gas so that it does not leak to the outside air (state of FIG. 3). Then, when the exhaust ozone gas not used for the reaction in the water treatment facility is introduced from the air supply hood 14 as shown by the arrow A, the exhaust ozone gas is the ozone decomposing agent filled in the cartridges 18d, 18c, 18b, 18a. Ozone is decomposed by passing through the inside, and exhaust hood 16
Is released into the atmosphere as indicated by arrow B.

When the ozone decomposing agent is replaced, as shown in FIG.
As shown in FIG. 2, the screw passed through the screw hole 13 is removed, the door 11a is opened, and the ozone decomposing agent filled in the exhaust ozone gas inflow side, the lowermost cartridge 18d in the illustrated example, is used by the handle 21. Then, the cartridge 18d is pulled out, and another cartridge filled with a new ozonolysis agent is newly replenished to the upper part of the uppermost cartridge 18a.

When replacing half of the ozone decomposer,
It suffices to pull out the two cartridges 18c and 18d and replenish the two cartridges filled with new ozone decomposing agent to the upper part of the uppermost cartridge 18a. By carrying out such an operation, it is possible to easily carry out the work of exchanging the ozone decomposing agent without winding up the dust.

FIG. 4 shows a second embodiment of the present invention, which is an example of an exhaust ozone treatment apparatus with a jack. Since the basic structure is the same as that of the first embodiment,
The same reference numerals are attached and displayed. In the second embodiment, in addition to the structure of the first embodiment, a jack 23 for lifting a cartridge one level above the cartridge to be taken out is provided on the container body 11 so that the lower cartridge filled with the ozone decomposing agent can be easily taken out. It is located on the side. 2
3a is a jack handle.

According to the second embodiment, when the lowermost cartridge 18d is pulled out, this cartridge 1
Since the support plate supporting the cartridge 18c one step higher than 8d is supported by the operation of the jack handle 23a and can be moved up and down, the cartridges 18a and 18b stacked above this can be lifted. The lowermost cartridge 18d can be easily pulled out. After pulling out the cartridge 18d, loosen the jack handle 23a and lower the upper cartridges by one step,
Another cartridge filled with a new ozonolysis agent is replenished on the uppermost cartridge 18a.

FIG. 5 shows a third embodiment of the present invention, which is an example of an exhaust ozone treating apparatus with a cartridge withdrawing guide. In addition to the structure of the first embodiment, this third embodiment has each cartridge 18 filled with an ozone decomposing agent.
The container main body 11 is provided with cartridge withdrawing guides 24, 24 so that the a, 18b, 18c, 18d can be easily withdrawn (the door 11a is not shown in FIG. 5).

As a result, at the time of exchanging the ozone decomposing agent, any of the cartridges 18a, 18b, 18c, 18d at each stage can be easily taken out along the drawing guides 24, 24.

[0036]

As described above in detail, according to the exhaust ozone treating apparatus of the present invention, during normal operation, ozone is generated by the activated carbon or the ozone decomposer filled in the cartridge stacked in the container. Is decomposed and released into the atmosphere through the exhaust hood, while when exchanging the ozone decomposing agent, the cartridge on the inflow side of the exhaust ozone gas is pulled out together with another cartridge filled with new ozone decomposing agent to remove the exhaust ozone gas. Since it is sufficient to replenish the outflow side, it is extremely easy to replace the exhausted activated carbon or the ozone decomposing agent, and there is no fear of polluting the surroundings of the device with dust or the like.

In particular, depending on the conditions of use, the amount of activated carbon or ozone decomposing agent used becomes large, and even if the apparatus becomes large, the operability of partial replacement of the activated carbon or ozone decomposing agent is improved and the cost is low. Can be contributed to.

In addition to the above construction, if a jack for lifting the cartridge is provided on the side of the container body, the lower cartridge filled with the ozone decomposing agent can be easily taken out, and a cartridge pulling guide is provided on the container body. If so, it is possible to easily take out any of the cartridges at each stage when exchanging the ozone decomposing agent.

Therefore, according to the present invention, the operational difficulty caused by the weight of the activated carbon or the ozone decomposing agent in the apparatus in which the activated carbon or the ozone decomposing agent is exchanged from the inflow side of the exhausted ozone gas is solved, and the apparatus is operated at the time of working. It becomes possible to provide an exhaust ozone treatment device capable of maintaining the surroundings of the cleanliness.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a door of an exhaust ozone treating apparatus according to the present invention is opened.

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a front view showing a state in which the door of FIG. 1 is closed.

FIG. 4 is a schematic diagram showing a second embodiment of the present invention.

FIG. 5 is a schematic diagram showing a third embodiment of the present invention.

6 (A), (B) and (C) are schematic views showing a specific example of a conventional exhaust ozone treatment apparatus using an ozone decomposing agent.

[Explanation of symbols]

 11 ... Container body 11a ... Door 12 ... Hinge 14 ... Air supply hood 15, 17 ... Packing 16 ... Exhaust hood 18a, 18b, 18c, 18d ... Cartridge 19 ... Support plate 20, 21 ... Handle 23 ... Jack 24 ... Drawer guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiichi Tsukamoto 2-17 Osaki 2-chome, Shinagawa-ku, Tokyo Inside the Meidensha Co., Ltd.

Claims (5)

[Claims] 1. An ozone-resistant exhaust gas treatment apparatus in which exhaust ozone gas generated in a water treatment facility is detoxified by an activated carbon contact method or an ozone decomposing agent and then released into the atmosphere. A plurality of cartridges filled with activated carbon or an ozone decomposing agent are stacked inside the container main body having the property so that the cartridges can be independently taken out, and exhaust ozone gas is introduced to one side of the container main body. The exhaust ozone treatment apparatus is characterized in that an air supply hood is attached to the container body, and an exhaust hood for releasing the treated gas into the atmosphere is attached to the other side of the container body. 2. The exhaust ozone treating apparatus according to claim 1, wherein the container body is configured so that two cylindrical objects cut in half in the longitudinal direction are combined and can be opened and closed like a door by a hinge. 3. The upper and lower surfaces of the cartridge are constituted by a mesh body having a mesh that does not allow the filled ozone decomposing agent to slip through, and each cartridge is made breathable, and the upper mesh body is removable. 3. The exhaust ozone treatment device according to claim 1, wherein. 4. A jack for raising a cartridge one level above the cartridge to be taken out is provided on a side portion of the container body so that the lower cartridge filled with the ozone decomposing agent can be easily taken out. Exhaust ozone treatment device described. 5. The exhaust ozone treating apparatus according to claim 1, wherein the container main body is provided with a cartridge withdrawing guide for withdrawing each cartridge filled with the ozone decomposing agent.