JP2000186809A - Flue gas temperature lowering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flue gas temperature lowering apparatus capable of preventing scattering of high concentration harmful substance even in the case of using an open type cooling tower. SOLUTION: A sprinkler 12 is provided above an interior of a temperature lowering tower 11 for feeding flue gas 1, connected to an outlet of a feed pump 13 through piping 15, and an inlet of the pump 13 is coupled to the tower 11 through piping 16. An open type cooling tower 14 is provided on the way of the piping 16, and a flow regulating valve 17 is provided on the way of the piping 16. An upstream side of the valve 17 of the piping 16 is connected to its downstream side through piping 18. An ozone feeder 19 is coupled to the piping 18, an ultraviolet emitting unit 20 is coupled to the downstream side of the feeder 19 of the piping 18, and a flow regulating valve 21 is provided at the upstream side of the feeder 19 of the piping 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flue gas temperature reducing apparatus for lowering the temperature of flue gas to prevent white smoke from being emitted to the atmosphere.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional flue gas temperature reducing device for lowering the temperature of flue gas generated by incineration of garbage and the like to prevent white smoke from being emitted to the atmosphere.

[0003] As shown in FIG. 3, flue gas 1 which has been subjected to a treatment for removing harmful substances and the like is sent to the lower side of the cooling tower 111. A sprinkler 112 is provided above the inside of the cooling tower 111. Sprinkler 112
An open cooling tower 114 for cooling the cooling water 2 to a predetermined temperature and a feed pump 113 for feeding the cooling water 2
Is connected to the lower part of the cooling tower 111 via the lower part. The upper part of the cooling tower 111 communicates with a chimney (not shown).

[0004] In such a flue gas temperature reducing apparatus, after the feed pump 113 and the cooling tower 114 are operated,
Exhaust gas 1 (temperature: 70 to 1)
(00 ° C.), cooling water 2 having a predetermined temperature is sprayed from the water sprayer 112, and the flue gas 1 is cooled (temperature: 40 ° C.).
° C) It is released from the upper part of the cooling tower 111 into the atmosphere via the chimney without white smoke. On the other hand, the cooling water 2 that has cooled the flue gas 1 is supplied from the lower part of the cooling tower 111 to the feed pump 11.
3 and the sprayer 112 via the cooling tower 114
Is sprinkled again.

[0005]

The flue gas 1 to be sent to the temperature reducing tower 111 of the above-described flue gas reducing device is cleaned beforehand to remove various harmful substances. In some cases, it may contain the harmful substance. When the flue gas 1 containing harmful substances is sent to the flue gas temperature reduction device, the cooling water 2 cools the flue gas 1 and at the same time cleans and removes the remaining harmful substances in the flue gas 1,
The flue gas 1 is released into the atmosphere without any problems.

However, the cooling water 2 that has cooled the flue gas 1
Since the concentration of the harmful substances gradually increases with the recycling, the harmful substances in the open-type cooling tower 114 are also scattered, so that the high-concentration harmful substances are also scattered. May be deteriorated. Here, if the harmful substance is a hardly decomposable substance such as an organic halogen compound such as PCBs or dioxins, a problem is likely to occur. Therefore, by applying a closed cooling tower,
Although it is conceivable to prevent the cooling water 2 from scattering to prevent the harmful substances from scattering around, it is difficult to apply the cooling water to all cases because the closed cooling tower is large and expensive. .

In view of the above, an object of the present invention is to provide a flue gas temperature reducing apparatus capable of preventing scattering of high-concentration harmful substances even when an open cooling tower is used. And

[0008]

According to a first aspect of the present invention, there is provided a flue gas reducing apparatus for cooling smoke, which is provided in the cooling tower to spray cooling water. A water sprayer, a cooling water circulating means for supplying the cooling water sprayed from the water sprayer to the water sprayer again, and an open cooling tower provided in the cooling water circulating means and cooling the cooling water. The apparatus for reducing flue gas temperature comprises a hydroxy radical supply means for supplying hydroxy radicals to the cooling water for cooling the flue gas.

According to a second aspect of the present invention, there is provided a flue gas cooling device, wherein a flue gas is supplied to the inside of the flue gas cooling device, a water sprinkler disposed in the cooling gas tower to spray cooling water, Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. The apparatus is characterized in that cooling water electrolysis means for performing an electrolysis treatment on the cooling water that has cooled the flue gas is provided.

According to a third aspect of the present invention, there is provided a flue gas cooling apparatus, wherein a flue gas is supplied to the inside of the flue gas cooling apparatus, a sprinkler disposed in the cooling tower to spray cooling water, Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. In the apparatus, it is provided that a hydroxy radical supply unit that supplies hydroxy radicals to the cooling water that has cooled the flue gas, and a cooling water electrolysis unit that performs an electrolysis process on the cooling water that has cooled the flue gas are provided. Feature

According to a fourth aspect of the present invention, there is provided a flue gas cooling apparatus according to a fourth aspect of the present invention, comprising: a cooling tower to which smoke is supplied; a water sprayer disposed in the cooling tower to spray cooling water; Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. In the apparatus, a solvent supply means for adding a lipophilic solvent to the cooling water, an oil-water separation means for separating the lipophilic solvent from the cooling water to which the lipophilic solvent has been added, and a liquid separated from the cooling water And a solvent electrolysis means for subjecting the lipophilic solvent to an electrolysis treatment.

According to a fifth aspect of the present invention, there is provided a smoke exhaust gas cooling apparatus according to any one of the first to fourth embodiments, wherein the cooling water circulation means has a bypass line.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.

<First Embodiment> A first embodiment of a flue gas reducing apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram.

As shown in FIG. 1, a flue gas 1 which has been subjected to a treatment for removing harmful substances and the like is sent to a cooling tower 11. A sprinkler 12 is provided above the inside of the cooling tower 11.
Is provided. The sprinkler 12 is connected via a pipe 15 to an outlet of a feed pump 13 for feeding the cooling water 2. The receiving port of the feed pump 13 is connected to the pipe 1
6 are connected. An open cooling tower 14 for cooling the cooling water 2 to a predetermined temperature is provided in the middle of the pipe 15. A flow control valve 17 is provided in the middle of the pipe 16.

The upstream side and the downstream side of the flow control valve 17 of the pipe 16 are connected by a pipe 18.
An ozone supply device 19 that supplies ozone 3 to the cooling water 2 flowing through the pipe 18 is connected to the pipe 18. An ultraviolet irradiation device 20 that irradiates ultraviolet rays (UV) 4 to the cooling water 2 flowing in the piping 18 is connected to a downstream side of the ozone supply device 19 of the piping 18. Piping 18
Upstream of the ozone feeder 19, a flow control valve 2
1 is provided.

In the present embodiment, a bypass line is formed by the pipe 18, the flow control valve 21, and the like, and the cooling water circulating means is formed by the feed pump 13, the pipes 15, 16, the flow control valve 17, the bypass line, and the like. The ozone supply device 19 and the ultraviolet irradiation device 20 constitute a hydroxy radical supply unit.

Next, the operation of such a flue gas temperature reducing apparatus will be described. After the flow control valve 17 is opened and the flow control valve 21 is closed and the feed pump 13 and the cooling tower 14 are operated, the smoke
(Temperature: 70-100 ° C.)
, Cooling water 2 of a predetermined temperature is sprayed, and the flue gas 1 is cooled (temperature: 40 ° C.) and discharged from the cooling tower 111 into the atmosphere via the chimney without white smoke. On the other hand, smoke
The cooling water 2 which has cooled the water is supplied from the lower part of the cooling tower 11 through the feed pump 13 and the cooling tower 14 to the sprinkler 12.
Is sprinkled again.

In this way, the flue gas 1 is cooled, and harmful substances (for example, PC) transferred from the flue gas 1 to the cooling water 2 are cooled.
When the concentration of a hardly decomposable substance such as an organic halogen compound such as B or dioxin exceeds a specified value, the flow control valve 21 is opened and the flow control valve 17 is closed to supply ozone. When the device 19 and the ultraviolet irradiation device 20 are operated to supply the ozone 3 to the cooling water 2 flowing in the pipe 18 and irradiate the cooling water 2 with UV4, highly active hydroxy radicals (OH radicals) are contained in the cooling water 2. The generated harmful substances in the cooling water 2 are decomposed, and the harmful substances are removed from the cooling water 2.

When the concentration of the harmful substances in the cooling water 2 becomes equal to or less than the specified value, the flow control valve 17 is opened and the flow control valve 21 is closed, and the ozone supply device 19 and the ultraviolet irradiation device By stopping 20, the flow of the cooling water 2 is returned from the pipe 18 to the pipe 16 to return to the initial state. Hereinafter, by repeating the above-described operation, the concentration of the harmful substance in the cooling water 2 can always be reduced to a specified value or less.

For this reason, the open cooling tower 14
Therefore, even if the cooling water 2 scatters, the concentration of harmful substances scattered around can be suppressed to a specified value or less.

Therefore, according to such a flue gas cooling apparatus, even if the cooling tower 14 is open, high concentration harmful substances are not scattered around the cooling tower 14, so that it is necessary to use a closed cooling tower. In addition, the deterioration of the surrounding environment can be prevented at a compact size and at low cost.

In the present embodiment, an ozone supply device 19 and an ultraviolet irradiation device 20 are provided in the pipe 18, and when the concentration of the harmful substance in the cooling water 2 exceeds a specified value, the pipe 18
The cooling water 2 is circulated in the cooling water 2 to decompose harmful substances in the cooling water 2. For example, the ozone feeding device 19 and An ultraviolet irradiation device 20 is provided. Normally, the cooling water 2 flows through the pipe 18. When the concentration of the harmful substance in the cooling water 2 exceeds a specified value, the cooling water 2 flows through the pipe 16 to cool the cooling water 2. It is also possible to decompose harmful substances in them. Here, the flow control valves 17 and 21 and the pipe 18
By activating the ozone feeding device 19 and the ultraviolet irradiation device 20 when the concentration of the harmful substance in the cooling water 2 exceeds the specified value, the cooling water 2 flowing through the pipe 16 is omitted.
It is also possible to decompose harmful substances in them.

Further, in the present embodiment, when the concentration of the harmful substance in the cooling water 2 exceeds the specified value, the entire amount of the cooling water 2 is allowed to flow through the pipe 18.
The flow control valves 17 and 21 are respectively adjusted so that a predetermined amount of the cooling water 2 always flows through the pipe 18 and the ozone supply device 19 and the ultraviolet irradiation device 20.
Is always operated to always decompose the harmful substance in the cooling water 2 flowing through the pipe 18 so that the concentration of the harmful substance in the cooling water 2 scattered from the cooling tower 14 is suppressed to a specified value or less. Is also possible.

In this embodiment, the harmful substances in the cooling water 2 are decomposed by the hydroxy radical supply means including the ozone supply device 19, the ultraviolet irradiation device 20, and the like. Instead of, for example, an electrode connected to a power supply is provided in the pipe to constitute an electrolyzing means for cooling water, and the harmful substance is decomposed by subjecting the cooling water flowing through the pipe to electrolysis. It is also possible. Further, both the hydroxyl radical supply means and the cooling water electrolysis means can be provided in parallel.

Examples of the hydroxy radical supply means include a method of irradiating ozone with an ultraviolet lamp using an ultraviolet lamp, a method of using ozone and hydrogen peroxide in combination, a method of irradiating hydrogen peroxide with an ultraviolet lamp by an ultraviolet lamp, ozone and peroxide. There is a method of irradiating hydrogen oxide with ultraviolet rays using an ultraviolet lamp.

An ultraviolet lamp (for example,
The method of irradiating ultraviolet rays with a low-pressure mercury lamp (output: 10 to 200 W) is to generate OH radicals by irradiating ozone (ozone concentration of 10 g / m ³ or more) with ultraviolet rays having wavelengths of 185 nm and 254 nm.

In the above-mentioned method of using ozone and hydrogen peroxide together, the injection amount of hydrogen peroxide is set to 10 to 5000 mg / liter, and the injection amount of ozone is set to 50 to 5000 mg / liter to generate OH radicals. .

In the method of irradiating the hydrogen peroxide with an ultraviolet lamp using an ultraviolet lamp, the injection amount of the hydrogen peroxide is set to 10 to 10.
OH radicals are generated by irradiating an ultraviolet ray from the ultraviolet lamp at 5000 mg / liter.

The method of irradiating the ozone and the hydrogen peroxide with ultraviolet rays by using an ultraviolet lamp is a method in which hydrogen peroxide is further injected (10 to 5000 mg / liter) into the above method to generate OH radicals.

Among the various hydroxy radical supply means, those applied in the present invention include the above-mentioned ones.
In the present embodiment, the above method is applied, and the strong OH generated by reacting ozone (O ₃ ) in water with ultraviolet irradiation as shown in the following Chemical Formula 1 is applied. The oxidative decomposition of radicals is used to decompose hardly decomposable substances.

[0032]

Embedded image

Here, when Fe ions, Cu ions, and the like coexist in the cooling water 2, as shown in the following “Chemical formula 2”,
By the action of the above-mentioned ions, OH radicals are easily generated significantly, and the effect of promoting decomposition is improved.

[0034]

Embedded image

On the other hand, the harmful substances to be decomposed in the present invention include harmful chlorinated aromatic compounds represented by dioxins and PCBs, highly condensed aromatic hydrocarbons and the like, garbage, night soil and sewage. This refers to the hardly decomposable substances contained in the flue gas generated by incineration of sludge.
The harmful substances (or environmental hormones) in the flue gas that can be decomposed by H radicals and electrolysis are not limited to these.

Here, the dioxins are a general term for polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs).
It is said to be generated in trace amounts during the combustion of chlorine compounds and certain organic chlorine compounds, and is a chemically colorless crystal. There are 75 types of PCDDs and 135 types of PCDFs according to the number of chlorines, from monochloride to octachloride. Of these, dibenzo-p-dioxin tetrachloride (T ₄ CDD) is the most common. It is known to be highly toxic. In addition, as harmful chlorinated aromatic compounds, in addition to dioxins, various organic chlorine compounds (for example, aromatic compounds such as phenol and benzene (for example, chlorobenzenes, chlorophenol and chlorotoluene) ), Chlorinated alkyl compounds, etc.) and must be removed from the use water in order to discharge the use water.

PCBs (polychlorinated biphenyls)
Is a generic term for compounds in which several chlorine atoms are added to biphenyl, and there are isomers depending on the number and positions of substitution of chlorine, and 2,6-dichlorobiphenyl, 2,2′-dichlorobiphenyl, 2,3,5 -Trichlorobiphenyl and the like are typical, and are known to be highly toxic and to emit dioxins when incinerated. is there.

<Second Embodiment> A second embodiment of the flue gas cooling apparatus according to the present invention will be described with reference to FIG. FIG. 2 is a schematic configuration diagram thereof. However,
The same members as those in the first embodiment described above are denoted by the same reference numerals as those used in the description of the first embodiment, and the description thereof is omitted.

As shown in FIG. 2, downstream of the flow control valve 21 of the pipe 18, there is provided a solvent feeding means for adding a predetermined amount of the lipophilic solvent 5 to the cooling water 2 flowing through the pipe 18. The solvent feeding device 22 is connected via a rotary atomizer (not shown), which is oil dispersing means for dispersing oil in water. An oil / water separator 23 which is an oil / water separator for separating the lipophilic solvent 5 from the cooling water 2 flowing through the pipe 18 is provided downstream of the solvent feeder 22 in the pipe 18. The oil supply outlet of the oil-water separator 23 communicates with the liquid storage tank 24. Electrodes 25 and 26 are arranged inside the liquid storage tank 24. These electrodes 2
5 and 26 are connected to a power supply 27. The lower part of the liquid storage tank 24 is connected to the solvent supply device 22 via a delivery valve 28 and a delivery pump 29.

In the present embodiment, the solvent electrolysis means is constituted by the liquid storage tank 24, the electrodes 25 and 26, the power supply 27 and the like, and the solvent recycling means is constituted by the delivery valve 28 and the delivery pump 29. I have.

In such a flue gas cooler, the concentration of harmful substances (for example, hardly decomposable substances such as organic halogen compounds such as PCBs and dioxins) transferred to the cooling water 2 exceeds the specified value. The flow control valve 2
1 is opened and the flow control valve 17 is closed,
When the solvent supply device 22 is operated to supply the lipophilic solvent 5 into the cooling water 2 flowing through the pipe 18, the lipophilic solvent 5
Extracts the harmful substance in the cooling water 2 and
After being removed from the inside, it is separated from the cooling water 2 by the oil / water separator 23 and sent into the liquid storage tank 24.

When the power supply 27 is operated, the harmful substances extracted into the lipophilic solvent 5 are electrolyzed and removed from the lipophilic solvent 5.

After the harmful substances in the lipophilic solvent 5 are decomposed and removed in this way, the delivery valve 28 is opened and the delivery pump 29 is operated to deliver the lipophilic solvent 5 to the solvent delivery device 22. Thereby, the lipophilic solvent 5 can be reused.

On the other hand, the cooling water 2 from which the lipophilic solvent 5 has been separated by the oil / water separator 23 is returned from the pipe 18 to the pipe 16 and is again used for cooling the flue gas 1 as described above.

When the concentration of the harmful substances in the cooling water 2 falls below the specified value, the flow control valve 17 is opened, the flow control valve 21 is closed, and the solvent feeding device 22 is stopped. Thereby, the flow of the cooling water 2 is returned from the pipe 18 to the pipe 16 to return to the initial state.
Hereinafter, by repeating the above-described operation, the concentration of the harmful substance in the cooling water 2 can always be reduced to a specified value or less.

Therefore, according to such a flue gas temperature reducing device, even if the cooling water 2 scatters from the open cooling tower 14 as in the case of the above-described embodiment, harmful substances scattered to the surroundings can be reduced. Since the concentration can be suppressed to a specified value or less, there is no need to use a closed cooling tower, and the deterioration of the surrounding environment can be prevented at a compact size and at low cost.

In the present embodiment, the pipe 18 is provided with the solvent feeder 22 and the oil / water separator 23 so that the cooling water 2
When the concentration of the harmful substance in the water exceeds the specified value, the cooling water 2 is circulated through the pipe 18 to extract and remove the harmful substance in the cooling water 2. As described above, for example, the solvent supply device 22 and the oil / water separation device 23 are provided in a portion of the pipe 16 between one end and the other end of the pipe 18, and the cooling water 2 is circulated to the pipe 18 at normal times, When the concentration of the harmful substance in the cooling water 2 exceeds the specified value, the cooling water 2 can be passed through the pipe 16 to extract and remove the harmful substance in the cooling water 2. Here, the flow control valves 17, 21 and the pipe 18 are omitted, and the cooling water 2
By operating the solvent feeding device 22 when the concentration of the harmful substance in the medium exceeds the specified value, the harmful substance can be extracted and removed from the cooling water 2 flowing through the pipe 16.

In this embodiment, when the concentration of the harmful substance in the cooling water 2 exceeds the specified value, the entire amount of the cooling water 2 is allowed to flow through the pipe 18.
The flow control valves 17 and 21 are adjusted so that a predetermined amount of the cooling water 2 always flows through the pipe 18, respectively, and the solvent supply device 22 and the oil / water separator 23 are always operated to flow through the pipe 18. By constantly extracting and removing harmful substances in the cooling water 2, the cooling tower 1
It is also possible to suppress the concentration of harmful substances in the cooling water 2 scattered from the cooling water 4 to a specified value or less.

[0049] Examples of the lipophilic solvent used in the present invention include acetonitrile and dimethyl sulfoxide.

[0050]

According to the first aspect of the present invention, there is provided a flue gas cooling apparatus,
A cooling tower to which smoke is supplied, a water sprayer disposed in the cooling tower to spray cooling water, and the cooling water sprayed from the water sprayer to the water sprayer again. A cooling water circulating means for supplying the cooling water, and an open-type cooling tower provided in the cooling water circulating means and configured to cool the cooling water. Since the supply of the hydroxy radical supply means is provided, it is possible to decompose the harmful substances transferred to the cooling water with the cooling of the flue gas with the hydroxy radical, so that even if the cooling water scatters from the open cooling tower, In addition, the concentration of harmful substances scattered around can be suppressed to a specified value or less, and deterioration of the surrounding environment can be prevented at a compact size and at low cost.

According to a second aspect of the present invention, there is provided a flue gas cooling apparatus, wherein a flue gas is supplied to the inside of the flue gas reducing apparatus, a sprinkler disposed in the cooling tower to spray cooling water, Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. In the apparatus, since the cooling water electrolysis means for performing the electrolysis treatment on the cooling water after cooling the flue gas is provided, it is possible to decompose harmful substances transferred to the cooling water with the cooling of the flue gas. Therefore, even if the cooling water scatters from the open cooling tower, the concentration of harmful substances scattered to the surroundings can be suppressed to a specified value or less, and deterioration of the surrounding environment can be prevented at a compact size and at low cost.

According to a third aspect of the present invention, there is provided a flue gas temperature reducing apparatus, wherein a flue gas is supplied to the inside of the flue gas cooling device, a sprinkler disposed in the cooling tower to spray cooling water, Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. In the apparatus, a hydroxy radical supply unit that supplies hydroxy radicals to the cooling water that has cooled the flue gas, and a cooling water electrolysis unit that performs an electrolysis process on the cooling water that has cooled the flue gas are provided. Since the harmful substances transferred to the cooling water due to the cooling of the flue gas can be decomposed, even if the cooling water scatters from the open cooling tower, the concentration of the harmful substances scattered to the surroundings is kept below the specified value. Restrain Can, it is possible to prevent deterioration of the surrounding environment in a compact and low cost.

According to a fourth aspect of the present invention, there is provided a flue gas cooling apparatus, wherein a flue gas is supplied to the inside of the flue gas cooling apparatus, a water sprinkler disposed in the cooling tower to spray cooling water, Cooling water circulating means for re-supplying the cooling water sprayed from the water sprinkler to the water sprinkler, and an open-air cooling tower provided in the cooling water circulating means and cooling the cooling water. In the apparatus, a solvent supply means for adding a lipophilic solvent to the cooling water, an oil-water separation means for separating the lipophilic solvent from the cooling water to which the lipophilic solvent has been added, and a liquid separated from the cooling water Since the lipophilic solvent is provided with a solvent electrolysis means for performing an electrolysis treatment, when the lipophilic solvent is added to the cooling water by the solvent feeding means, the harmful substances transferred to the cooling water with the cooling of the flue gas Is extracted into a lipophilic solvent and After separating the lipophilic solvent from the cooling water, if the lipophilic solvent is subjected to electrolysis by the solvent electrolysis means, harmful substances can be decomposed, so that the cooling water is scattered from the open cooling tower. In addition, the concentration of harmful substances scattered around can be suppressed to a specified value or less, and deterioration of the surrounding environment can be prevented at a compact size and at low cost.

According to a fifth aspect of the present invention, there is provided a flue gas cooling apparatus according to any one of the first to fourth aspects, wherein the cooling water circulation means has a bypass line.
For example, if a predetermined amount of cooling water is always circulated in the bypass line, the amount of cooling water required for decomposition processing can be minimized. The size can be reduced to a minimum, and the size and cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of a flue gas temperature reducing apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram of a second embodiment of a flue gas cooling apparatus according to the present invention.

FIG. 3 is a schematic configuration diagram of an example of a conventional flue gas temperature reducing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Smoke exhaust 2 Cooling water 3 Ozone 4 Ultraviolet (UV) 5 Lipophilic solvent 11 Cooling tower 12 Sprinkler 13 Feed pump 14 Cooling tower 15, 16 Pipe 17 Flow control valve 18 Pipe 19 Ozone feeder 20 Ultraviolet irradiation device 21 Flow control valve 22 Solvent feeder 23 Oil / water separator 24 Reservoir 25, 26 Electrode 27 Power supply 28 Delivery valve 29 Delivery pump

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B01J 19/08 C02F 1/78 4G075 C02F 1/26 F28C 1/16 1/32 B01D 53/34 ZABC 1 / 46 134F 1/78 F28C 1/16 (72) Inventor Noriaki Senba 1-8-1, Koura, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Inside the Mitsubishi Research Institute of Mitsubishi Heavy Industries, Ltd. 8-chome 1, Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory (72) Inventor Satoshi Okuno 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. Yokohama Works F-term (reference) 3K070 DA04 DA37 DA42 4D002 AA21 BA02 BA05 BA08 BA09 BA13 CA01 CA07 CA13 DA51 DA52 DA57 DA70 EA05 EA07 HA01 HA07 4D037 AA08 AB06 AB14 AB16 BA11 BB06 BB08 CA04 4D050 AA08 AB15 AB 19 BB02 BB09 BC09 BC10 BD02 BD03 BD06 CA10 CA20 4D061 DA05 DB18 DB19 DC09 DC11 EA01 EB01 EB04 EB17 EB19 ED20 FA05 FA07 FA16 4G075 AA37 BA04 BA05 BA06 BB03 BB05 BD03 BD13 BD15 BD23 CA03 CA20 EC33 EA21 EC02 FC02 FC11

Claims (5)

[Claims] 1. A cooling tower to which exhaust gas is sent, a water sprayer disposed in the cooling tower to spray cooling water, and a cooling water sprayed from the water sprayer. A flue gas cooling device comprising: a cooling water circulating means for supplying the water to the water sprinkler again; and an open cooling tower provided in the cooling water circulating means for cooling the cooling water. A flue gas temperature reducing device comprising a hydroxyl radical supply means for supplying hydroxyl radicals to water. 2. A cooling tower to which exhaust gas is sent, a water sprayer disposed in the cooling tower to spray cooling water, and a cooling water sprayed from the water sprayer. A flue gas cooling device comprising: a cooling water circulating means for supplying the water to the water sprinkler again; and an open cooling tower provided in the cooling water circulating means for cooling the cooling water. A flue gas temperature reducing device comprising a cooling water electrolysis means for performing electrolysis treatment on water. 3. A cooling tower to which exhaust gas is sent, a water sprayer disposed in the cooling tower to spray cooling water, and a cooling water sprayed from the water sprayer. A flue gas cooling device comprising: a cooling water circulating means for supplying the water to the water sprinkler again; and an open cooling tower provided in the cooling water circulating means for cooling the cooling water. A flue gas cooling device comprising: a hydroxyl radical supply unit for supplying hydroxyl radicals to water; and a cooling water electrolysis unit for performing an electrolysis treatment on the cooling water that has cooled the flue gas. 4. A cooling tower to which smoke is supplied, a water sprayer disposed in the cooling tower to spray cooling water, and a cooling water sprayed from the water sprayer. A cooling water circulating means for re-supplying the water to the sprinkler; and an open-type cooling tower provided in the cooling water circulating means and cooling the cooling water. Solvent supply means to be added, oil / water separation means to separate the lipophilic solvent from the cooling water to which the lipophilic solvent has been added, and a solvent for subjecting the lipophilic solvent separated from the cooling water to electrolysis treatment A flue gas temperature reducing device, comprising: 5. The flue gas cooling device according to claim 1, wherein the cooling water circulation means has a bypass line.