JP3404026B2 - Gas treatment system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas treatment system for removing offensive odors and harmful substances from exhaust gas generated in a solid fuel system and a sewer system.

[0002]

2. Description of the Related Art Gas treatment systems for removing harmful substances and malodors from exhaust gas containing harmful substances such as dioxins and malodors have been used for various purposes. For example,
In a solid fuel conversion system, a gas treatment system is used to remove harmful substances and odors from exhaust gas generated during a drying process.

The case where the gas treatment system is applied to a solid fuel conversion system will be described below as an example. The solid fuel conversion system is a system for producing solid fuel from combustible waste, and includes a pulverizing step for pulverizing combustible waste and a drying step for removing water from the combustible waste after pulverization. A gas treatment system is used to remove offensive odors and harmful substances from the exhaust gas generated during the drying process.

However, the conventional gas treatment system employs the combustion method of burning the exhaust gas to remove the offensive odor and harmful substances in the exhaust gas, so that the operating cost is high and the temperature control and the like are maintained. There was a problem that management was also complicated. Furthermore, there is also a problem that carbon dioxide gas accompanying combustion promotes global warming.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is inexpensive and capable of effectively removing odors or harmful substances from exhaust gas containing the odors or harmful substances. Another object is to provide a simple gas treatment system.

[0006]

In order to achieve the above-mentioned object, the present invention comprises a treated gas introduction part, an ozone dissolved liquid introduction part and a gas discharge part which are provided in order along the flow direction of the treated gas. An ozone oxidation tower having a housing having, a treated gas introducing line whose tip is connected to the treated gas introducing section, an ozone dissolving solution supply mechanism for supplying an ozone dissolving solution to the ozone water introducing section, and a base. A discharge line having an end connected to the gas discharge part , the heating device and the heating device.
And a discharge line in which an adsorption device arranged in the subsequent stage is inserted , one end of which is opened outward and the other end of which is treated.
Connected to the dryer connected to the base end of the physical gas introduction line
First heat exchange line, the first heat exchange line and the treated object
The first heat exchange section that exchanges heat with the gas introduction line
The first heat exchange mechanism and the one end part is the latter stage of the adsorption device.
Second discharge line communicating with the discharge line in
And the second discharge line and the treated gas introduction line
Second heat exchanger having a second heat exchange section for performing heat exchange between the two
The ozone dissolution liquid supply mechanism includes a solvent line to which a solvent for generating an ozone dissolution liquid is supplied, a cooling device inserted in the solvent line, and a cooling device disposed downstream of the cooling device. A gas treatment system comprising: a dissolving device; an ozone generator that supplies ozone gas to the dissolving device; and an ozone dissolving liquid supply line that supplies an ozone dissolving liquid from the dissolving device to the ozone dissolving liquid introducing section. provide.

Further , according to the present invention, the gas flow along the flow direction of the gas to be processed is provided.
And the ozone dissolving liquid guide
Ozone with housing having inlet and outlet
The oxidation tower and the tip end were connected to the treated gas introduction part
Ozone is introduced into the treated gas introduction line and the ozone water introduction section.
The ozone solution supply mechanism that supplies the solution and the base end
The discharge line connected to the gas discharge unit and the base end are
It communicates with the ozone oxidation tower, and the low concentration remaining in the ozone oxidation tower.
Ozone configured to extract excess ozone dissolved liquid
Dissolved liquid extraction line and tip of the ozone dissolved liquid extraction line
The precipitation tank connected to the section and the supernatant water of the precipitation tank
Ozone dissolution liquid discharge line and the ozone dissolution liquid discharge line
And an evaporation means for evaporating a low-concentration ozone dissolved solution flowing through the ozone dissolved solution supply mechanism. The ozone dissolved solution supply mechanism includes a solvent line to which a solvent for generating the ozone dissolved solution is supplied, and the solvent line.
The cooling device inserted in the
A melting device and an ozonizer for supplying ozone gas to the melting device.
Generator and the ozone dissolving liquid from the dissolving device.
The ozone dissolution liquid supply line that supplies the solution
Due to latent heat when the low-concentration ozone solution is evaporated.
So that the solvent flowing through the solvent line can be cooled.
A configured gas treatment system is provided.

Preferably, the precipitate in the settling tank is solidified.
Can be configured to be taken as feedstock for fueling systems
It

Further, preferably, the ozone solution feeder
In addition, the residual ozone gas in the melting device is
The gas to be treated introduction line and / or the gas to be treated in the housing
It has an ozone gas supply line that supplies it to the processing gas.
obtain.

Also, preferably, the housing is further
Is introduced from the ozone solution introducing part, and the gas to be treated is
Having a reservoir to store the ozone solution after contact with
The solvent supply line has a base end contacting the reservoir.
Will be continued.

More preferably, the ozone solution supply
The mechanism further treats the ozone dissolved liquid in the storage unit as the above-mentioned treated object.
To gas to be processed in gas introduction line and / or housing
It may have an auxiliary line for feeding .

Further preferably, the gas to be treated is introduced.
A dust collector inserted in the line may be further provided.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 Hereinafter, a preferred embodiment of a gas treatment system according to the present invention will be described with reference to the accompanying drawings. In addition,
In the present embodiment, a gas treatment system will be described as an example, in which high temperature exhaust gas generated during a drying process in a solid fuel system is used as a gas to be treated. FIG. 1 is a flow chart of the gas treatment system according to the present embodiment.

As shown in FIG. 1, a gas treatment system 1 according to the present embodiment comprises an ozone oxidation tower 10 for removing harmful substances and odors from a gas to be treated by an oxidizing action of an ozone dissolved liquid, and the ozone oxidation tower. A treated gas introduction line 20 for introducing a treated gas to the ozone treatment chamber 10, and an ozone water supply mechanism 30 for supplying an ozone solution to the ozone oxidation tower 10.
And a discharge line 40 for discharging the treated gas from the ozone oxidation tower to a predetermined point.

The ozone oxidation tower 10 has a housing 11 which defines a reaction space between the gas to be treated and the ozone solution. The housing 11 is at a subsequent stage in the flow direction of the gas to be processed (in the present embodiment, the upper part of the housing).
And a gas discharge part 11a disposed in the
An ozone-dissolved liquid introduction part 11b provided on the upstream side in the flow direction of the processed gas, and a processed-gas introduction part 11c provided on the upstream side in the flow direction of the processed gas from the ozone-dissolved liquid introduction part 11b. And the gas to be treated 1 comes into contact with the ozone-dissolved liquid in the housing, and then the gas discharge part 1
It is configured to be discharged from 1a.

The housing 11 may preferably be provided with a corrugated gas-liquid countercurrent contact portion 11d between the gas to be treated introducing portion 11c and the ozone dissolved liquid introducing portion 11b. FIG. 2 shows an enlarged vertical sectional view of the gas-liquid countercurrent contact portion 11d. As shown in FIG. 2, the gas-liquid countercurrent contact portion 11d.
Includes a plurality of corrugated plates 12 that are bent so as to form a continuous "dogleg", and are arranged in parallel in a horizontal direction with a gap 13 therebetween. A flow path for the gas to be treated introduced from the introduction portion 11c is formed.

By providing such a gas-liquid countercurrent contact portion 11d, the contact efficiency of the gas to be treated with the ozone-dissolved liquid can be improved, and harmful substances and malodors can be effectively removed from the gas to be treated. be able to. That is, while the gas to be processed passes through the gap 13 from below to above,
The ozone dissolved liquid flows down from the one corrugated plate 12a to the other corrugated plate 12b adjacent to the one corrugated plate 12a across the gap 13. Therefore, it is possible to effectively prevent the risk that the gas to be processed is discharged from the gas discharge portion without coming into contact with the ozone solution.

The ozone dissolving liquid supply mechanism 30 is provided with a solvent line 31 to which a solvent such as water for producing an ozone dissolving liquid is supplied, and a cooling device 32 inserted in the solvent line 31.
A dissolution tank 33 for storing the solvent cooled by the cooling device 32, a dissolution device 33 such as a mixer, an ozone generator 34 for supplying ozone gas into the solvent stored in the dissolution device, and the dissolution device 33. An ozone dissolving liquid supply line 35 for supplying the ozone dissolving liquid to the ozone dissolving liquid introducing section 11b is provided.

As described above, the ozone dissolving liquid supply mechanism 30
Is configured to dissolve the ozone gas after cooling the solvent to, for example, 25 ° C. to 40 ° C., whereby
While effectively preventing the ozone gas dissolved in the solvent from being regenerated, a low temperature (for example, 25 ° C. to 40 ° C.) ozone dissolved liquid is obtained. The low-temperature ozone solution can lower the temperature of the treated gas discharged from the ozone oxidation tower 10 and reduce the amount of water contained in the treated gas, thereby reducing secondary pollution. It is possible to effectively suppress the generation of white smoke when discharged into the atmosphere.

That is, since the gas to be treated is brought into contact with the ozone dissolving liquid in the housing, the treated gas discharged from the housing is saturated with water. In the present embodiment, as described above, a low temperature (for example, 25
Since the ozone-dissolved liquid (° C to 40 ° C) is brought into contact with the gas to be treated, the temperature of the post-treatment gas in a water-saturated state should be lowered as compared with the case where the gas to be treated is brought into contact with the ozone-dissolved liquid which is not cooled You can Since the amount of water contained in the gas in a water saturated state decreases as the temperature of the gas decreases, as a result, in the present embodiment, the water content of the treated gas discharged from the housing should be reduced. You can

In particular, since the exhaust gas generated during the drying process in the solid fuel system is a high temperature and high humidity gas of 100 ° C. or higher, when the high temperature and high humidity exhaust gas is brought into contact with an ozone-dissolved liquid which is not cooled, a high temperature is emitted from the housing. (For example, 7
The gas will be discharged after the treatment at 0 ° C. On the other hand, in the present embodiment, the temperature is low (for example, 25 ° C.).
-40 ° C.) ozone-dissolved liquid is used. Therefore, the temperature of the treated gas discharged from the housing is 50 ° C. or lower,
Preferably, it can be lowered to 40 ° C. Therefore, the water content of the gas after treatment can be significantly reduced as compared with the case of using an ozone solution that is not cooled.

Further, it is possible to generate a low temperature ozone solution by dissolving the ozone gas in the solvent and then cooling it. According to this method, the ozone gas dissolved in the ozone solution at the time of cooling is produced. May occur again. On the other hand, in the present embodiment, the ozone gas is dissolved after cooling the solvent. Therefore, it is possible to effectively prevent the ozone gas from being regenerated from the ozone solution.

Preferably, the housing 11 may be provided with a storage portion 11e for storing the ozone dissolving liquid after being introduced into the housing 11 from the ozone dissolving liquid introducing portion 11b and coming into contact with the gas to be treated, The base end of the solvent line 31 can be connected to the storage section 11e. With this configuration, the refrigerant line 3
1, the dissolution device 33, the ozone dissolution liquid supply line 35, and the housing 11 constitute an ozone dissolution liquid circulation circuit, which enables efficient use of the ozone dissolution liquid.

Further preferably, the discharge line 40 may be provided with an adsorption device 42. The adsorption device 42
Can have, for example, activated carbon and a manganese-based catalyst, whereby odorous components and toxic substances such as dioxins and ozone gas that cannot be completely removed by the oxidation tower 10 can be removed.

More preferably, a heating device 41 may be provided in front of the adsorbing device 42, whereby not only the efficiency of removing odorous components and the life of adsorbent in the adsorbing device 42 are extended, but also the efficiency of removing dioxin is increased. Can be improved. That is, it is possible to gasify the dioxin adsorbed to the gas particles by raising the temperature of the post-treatment gas flowing in the discharge line,
As a result, the efficiency of removing dioxin in the adsorption device 42 can be improved.

When activated carbon is used as the adsorption device 42, the adsorption efficiency decreases when the gas temperature exceeds 50 ° C. Therefore, the temperature of the treated gas after being discharged from the housing is preferably 40 ° C. In addition, the temperature of each line can be controlled so that the gas temperature after the heating device is set to 45 ° C.

Preferably, an ozone gas supply line 50 for supplying the residual ozone gas in the melting apparatus to the gas to be treated introduction line 20 and / or the gas to be treated in the housing may be provided, whereby the ozone gas is dissolved. It is possible to effectively utilize the ozone gas that was not available.

Further, an auxiliary line 60 for supplying the ozone dissolved liquid in the storage portion 11e toward the gas to be treated introducing line 20 and / or the gas to be treated in the housing 11 is provided.
It is possible to cool the high temperature gas to be treated, and further improve the contact efficiency of the gas to be treated with the ozone solution.

Preferably, a dust collector 80 such as a cyclone can be provided in front of the oxidation tower 10 to effectively suppress clogging of the oxidation tower and adsorption device due to dust contained in the gas to be treated. You can or,
Preferably, the ozone dissolving liquid circulation circuit can be provided with an ozone dissolving liquid discharge line 70, whereby a predetermined amount of ozone is added when the concentration of impurities such as oxidation products and basic substances in the ozone dissolving liquid increases. It is possible to discharge the solution and maintain the purity of the ozone solution that comes into contact with the gas to be treated. Since the amount of ozone dissolved liquid discharged from the ozone dissolved liquid discharge line 70 is extremely small, it is possible to return the ozone dissolved liquid to the dryer, and thereby to realize the closed system and the gas to be treated. It is possible to maintain the purity of the contacting ozone solution.

[0030]

EXAMPLES Below, the results of comparison between the gas treatment system according to the present embodiment (example) and the conventional gas treatment system using the combustion method (comparative example) are shown. In this example, ammonia 0.3 ppm, trimethylamine 0.003 ppm,
Hydrogen sulfide 0.01ppm, methyl mercaptan 0.001ppm, methyl sulfide 0.005ppm, methyl disulfide 0.004ppm, acetaldehyde 0.02ppm, odor concentration 20000, dioxin 10ng TEQ / m ³
N gas is used as the gas to be processed, and the flow rate of the gas is 6000 m ³ N
/ h (water vapor content 2330 m ³ N / h) and temperature 150 ℃.

[0031]

[Table 1]

As shown in Table 1, the gas treatment system according to the present embodiment maintains the efficiency of removing malodors and harmful substances to be equal to or higher than that of the conventional gas treatment system using the combustion method. At the same time, the manufacturing cost and the operating cost can be reduced, and the maintainability can be improved.

Embodiment 2 Hereinafter, another preferred embodiment of the gas treatment system according to the present invention will be described with reference to the accompanying drawings. FIG. 3 is a flowchart of the gas treatment system 100 according to this embodiment. The same or corresponding members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, the gas treatment system 100 according to the present embodiment is provided with a first heat exchange mechanism and a second heat exchange mechanism which act on the treated gas introduction line 20.

The first heat exchange mechanism has a first heat exchange line 111 having one end open outward and the other end communicated with the dryer, the first heat exchange line 111 and the object to be treated. First heat exchange section 1 for exchanging heat with the gas introduction line 20
12 and 12.

By providing such a first heat exchange mechanism 110, the temperature of the gas to be treated supplied from the gas to be treated introducing line 20 to the ozone oxidation tower 10 can be lowered. For example, when the temperature of the gas to be processed introduced from the dryer to the gas to be processed introducing line 20 is 150 ° C., by providing the first heat exchange mechanism 110, the temperature of the gas to be processed in the subsequent stage of the first heat exchange section 112 is increased. The temperature of the processing gas can be lowered to 80 ° C to 90 ° C. Thus, by lowering the temperature of the gas to be treated introduced into the ozone oxidation tower 10, the temperature of the post-treatment gas discharged from the ozone oxidation tower 10 can be lowered inevitably.
As described above, since the water content of the processed gas is proportional to the temperature of the processed gas, the water content of the processed gas can be further reduced by providing the first heat exchange mechanism 110. It will be possible. Further, the first heat exchange mechanism 1
By including 10, the fuel such as kerosene in the dryer can be reduced, and the operating cost can be reduced.

In the second heat exchange mechanism 120, one end communicates with the latter stage of the adsorption device 42 in the discharge line 40, and the other end has a second discharge line 121 opened to a predetermined exhaust point. A second heat exchanging section 122 for exchanging heat between the second exhaust line 121 and the treated gas introducing line 20 is provided.

By providing the second heat exchange mechanism 120, the temperature of the gas to be treated supplied to the ozone oxidation tower 10 can be further lowered, whereby the water content of the treated gas can be further reduced. Can be made.

More specifically, in the latter stage of the adsorption device 42, the post-treatment gas has a temperature of about 40 ° C to 45 ° C. On the other hand, in the preceding stage of the ozone oxidation tower 10, the temperature of the gas to be treated is about 80 ° C. to 90 ° C. when the first heat exchange mechanism 110 is provided, and the first heat exchange mechanism 110 is used.
If not provided, the temperature is about 100 ° C to 150 ° C. Therefore, the second heat exchange section 120 exchanges heat between the post-treatment gas flowing through the second discharge line 121 and the gas to be treated flowing through the gas to be treated introducing line 20, whereby the ozone oxidation tower 10 is heated. It is possible to further reduce the temperature of the gas to be treated introduced into the. That is, by providing the second heat exchange mechanism 120, the first heat exchange mechanism 1
10 is provided, the temperature of the gas to be treated introduced into the ozone oxidation tower 10 can be lowered to, for example, about 50 ° C. to about 60 ° C., and the first heat exchange mechanism 110 is not provided. Even if there is, the temperature of the gas to be treated introduced into the ozone oxidation tower 10 can be lowered to, for example, about 80 ° C to 90 ° C. Further, by providing the second heat exchange mechanism 120, it is possible to raise the temperature of the post-treatment gas discharged from the adsorption device 42, thereby making the post-treatment gas into an unsaturated state. Therefore, it is possible to prevent the exhaust gas discharged from the gas treatment system from becoming white smoke. Further, by providing the first heat exchange mechanism 110 and / or the second heat exchange mechanism 120, it is possible to reduce the gas volume of the gas to be treated, and thereby the ozone oxidation tower 10 at the subsequent stage can be reduced.
Can be downsized, and the temperature of the gas to be processed can be lowered, whereby the cooling device 32 can be downsized.

Further, the gas treatment system 100 according to the present embodiment is equipped with a cooling mechanism 130 utilizing the low concentration excess ozone dissolved liquid in the ozone oxidation tower 10. The cooling mechanism 130 includes an excess ozone dissolved solution extraction line 131 for extracting the low-concentration excess ozone dissolved solution in the ozone oxidation tower 10, a settling tank 132 connected to the tip of the ozone dissolved solution extraction line 131, and the precipitation. The low-concentration ozone dissolving liquid is provided with a surplus ozone dissolving liquid discharging line 133 for taking out the supernatant water of the tank 132 and a fan (not shown) for evaporating the low-concentration ozone dissolving liquid flowing through the surplus ozone dissolving liquid discharging line 133. The solvent flowing in the solvent line 31 can be cooled by latent heat when the solvent evaporates. By providing such a cooling mechanism 130, the cooling device 32 can be downsized, and a part or all of the low-concentration excess ozone dissolved liquid can be exhausted as vapor.

Preferably, the base end portion of the excess ozone dissolved solution extraction line 131 can be connected to a predetermined water level position in the storage section 11e, whereby the low concentration excess ozone dissolved solution in the oxidation tower 10 can be connected. It can be taken out easily. The ozone solution introducing section 11
Most of the ozone in the ozone solution supplied from b is separated during the contact with the gas to be treated. Therefore, the ozone solution stored in the storage section 11e has a low concentration.

Preferably, a recycle line 1 (not shown) for taking out the precipitated substance in the settling tank 132 is provided,
The precipitate can be reused as a part of the raw material in the solid fuel conversion system. By providing such a recycling line, unnecessary substances discharged to the outside of the system can be reduced as much as possible.

When a room temperature processing gas system is additionally provided, preferably, a low-concentration excess ozone dissolved solution of a room temperature ozone oxidation tower in the room temperature processing gas system can be flowed to the precipitation tank. Thereby, the settling tank 13
It is possible to lower the temperature of the low-concentration ozone solution in 2 and efficiently dispose of the excess ozone solution in the room temperature treatment gas system.

Incidentally, in the present embodiment, the first
Although the aspect including all of the heat exchange mechanism 110, the second heat exchange mechanism 120, and the cooling mechanism 130 has been described, of course,
These may be used alone or in any combination.

[0045]

According to the gas treatment system of the present invention, the odor and harmful substances are removed from the gas to be treated by utilizing the oxidizing action of the ozone solution.
The manufacturing cost and the operating cost can be reduced as compared with the case of using the combustion method. Further, ozone gas is dissolved in the solvent after cooling to generate a low-temperature ozone solution, and the low-temperature ozone solution is supplied to the ozone oxidation tower and brought into contact with the gas to be treated. It is possible to lower the temperature of the post-treatment gas discharged from the ozone oxidation tower and effectively reduce the amount of water contained in the post-treatment gas, while effectively preventing the regeneration of ozone gas from the post-treatment gas. Therefore, it is possible to effectively prevent the adsorption efficiency of the adsorption device arranged at the subsequent stage of the ozone oxidation tower from being deteriorated by the moisture contained in the post-treatment gas. By providing the adsorption device, the environmental hormone substance can be effectively removed.

[0046] Also, by the heating device disposed upstream of the suction device, the harmful substances such as dioxin contained in the gas after treatment is discharged from the ozone oxidation tower can be gasified, thereby, the The efficiency of removing harmful substances by the adsorption device can be improved.

Further, one end is released outward, and
The other end is connected to the base end of the treated gas introduction line.
And a first heat exchange line communicating with the dryer,
Heat exchange between the inlet and the gas introduction line
A first heat exchanging mechanism having a first heat exchanging portion, and one end portion is forward
It was connected to the discharge line at the latter stage of the adsorption device.
Second discharge line, the second discharge line and the gas to be treated
It has a second heat exchange part that exchanges heat with the introduction line.
And a second heat exchange mechanism,
After treatment, the temperature of the gas can be lowered,
This reduces the water content of the gas after the treatment.
This prevents the smoke emitted from the adsorption device from becoming white smoke.
In addition, the fuel for the dryer can be reduced. Also, the Ozo
The size of the oxidation tower and the cooling device can be reduced.

Further, if a dust collector is provided in the preceding stage of the oxidation tower, the processing efficiency of the oxidation tower and the adsorption device can be effectively maintained even if a large amount of dust is contained in the gas to be processed. can do.

Further , according to the gas treatment system of the present invention,
For example, a base end portion is communicated with the ozone oxidation tower, and an ozone dissolution liquid extraction line configured to extract the low-concentration excess ozone dissolution liquid in the ozone oxidation tower, and a tip end portion of the ozone dissolution liquid extraction line And a means for evaporating the low-concentration ozone solution flowing through the ozone-dissolved solution discharge line, and an evaporation means for evaporating the low-concentration ozone-dissolved solution flowing through the ozone-dissolved solution discharge line. Since it is configured to cool the solvent flowing in the solvent line by latent heat when the liquid evaporates, it is possible to downsize the cooling device and vaporize a part or all of the low-concentration excess ozone dissolved liquid. Can be exhausted as.

Further, if the precipitate in the settling tank is taken out as a raw material for the solid fuel conversion system, the amount of the ozone dissolved liquid discharged out of the system can be reduced as much as possible.

[Brief description of drawings]

FIG. 1 is a flow chart of an embodiment of a gas treatment system according to the present invention.

FIG. 2 is a partially enlarged view of an ozone oxidation tower in the gas treatment system shown in FIG.

FIG. 3 is a flow chart of another embodiment of the gas treatment system according to the present invention.

[Explanation of symbols]

1 gas processing system 10 Ozone oxidation tower 11 housing 11a gas discharge part 11b Ozone dissolution liquid introduction section 11c Processing gas introducing part 11e Reservoir 20 Process gas introduction line 30 Ozone dissolution liquid supply mechanism 31 solvent line 32 Cooling device 33 Dissolution device 34 Ozone generator 35 Ozone dissolution liquid supply line 40 discharge line 41 heating device 42 Adsorption device 80 dust collector 100 gas processing system 110 First heat exchange mechanism 111 First Heat Exchange Line 112 First heat exchange section 120 Second heat exchange mechanism 121 Second discharge line 122 Second heat exchange section 130 Cooling mechanism 131 Low-concentration excess ozone dissolution liquid extraction line 132 settling tank 133 Low-concentration excess ozone dissolved liquid discharge line

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI B01D 53/70 B01D 53/34 121C 53/72 134E 53/74 53/77 C10L 5/46 ZAB (56) References 5-57134 (JP, A) JP 2000-117047 JP 58-127654 (JP, A) JP 10-57749 (JP, A) JP 55-23085 (JP, B2) JP 56 −44002 (JP, B2) JP-B-4-4008 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 53/34

Claims (7)

(57) [Claims] 1. An ozone oxidation tower comprising a housing having a treated gas introduction part, an ozone dissolved liquid introduction part and a gas discharge part, which are provided in order along the flow direction of the treated gas, and a tip portion of the treated object. The treated gas introducing line connected to the gas introducing section, the ozone dissolving solution supplying mechanism for supplying the ozone dissolving solution to the ozone water introducing section, and the discharge line having the base end connected to the gas discharging section.
And a heating device, and an adsorption device arranged in the latter stage of the heating device.
And Togakai interpolated discharge line, one end portion is released to the outside, and the other end portion to be processed moth
Was connected to the dryer to which the base end of the introduction line was connected.
First heat exchange line, the first heat exchange line and the gas to be treated
It has a first heat exchange section that exchanges heat with the introduction line.
The first heat exchange mechanism, and one end of which is connected to the discharge line in the latter stage of the adsorption device.
A second discharge line in communication with the second discharge line, and
Second heat exchange that exchanges heat with the target gas introduction line
A second heat exchange mechanism having a section , the ozone dissolution liquid supply mechanism, a solvent line to which a solvent for generating the ozone dissolution liquid is supplied, and a cooling device inserted in the solvent line, A melting device arranged in the latter stage of the cooling device; an ozone generator for supplying ozone gas to the melting device; and an ozone dissolution liquid supply line for supplying an ozone dissolution liquid from the dissolution device to the ozone dissolution liquid introducing section. A gas treatment system characterized by having. 2. Provided in sequence along the flow direction of the gas to be treated
Treated gas introduction part, ozone dissolved liquid introduction part and gas
Ozone oxidation tower having a housing having a discharge part, and a gas to be processed whose tip is connected to the gas to be processed introducing part
Introducing line and ozone dissolving that supplies ozone dissolving liquid to the ozone water introducing part
The dissolution solution supply mechanism, a discharge line whose base end is connected to the gas discharge part, and a base end which communicates with the ozone oxidation tower,
Configured to extract the low-concentration excess ozone dissolved solution
And a settling tank connected to the tip of the ozone dissolution liquid extraction line
And an ozone dissolution liquid discharge line for extracting the supernatant water of the precipitation tank
And a low-concentration ozone solution that flows through the ozone solution discharge line
And an evaporation means for evaporating the ozone dissolution liquid , and the ozone dissolution liquid supply mechanism generates an ozone dissolution liquid.
Solvent line for supplying the solvent for
Inserted cooling device and melting device placed after the cooling device
Device and ozone generation to supply ozone gas to the melting device
Machine and ozone dissolution liquid from the dissolution device
And an ozone dissolving liquid supply line for supplying the liquid to the liquid introducing portion, and the ozone dissolving liquid is supplied with latent heat when the low concentration ozone dissolving liquid is evaporated.
It is designed to cool the solvent flowing through the solvent line.
Gas treatment system characterized in that it has been. 3. The gas treatment system according to claim 2 , wherein the precipitate in the settling tank is configured to be taken out as a raw material for a solid fuel conversion system. 4. The ozone solution supply mechanism further comprises:
Introduction of the ozone gas remaining in the melting device into the gas to be treated
Towards the gas to be treated in the line and / or in the housing
It has a special ozone gas supply line
The gas treatment system according to any one of claims 1 to 3, which is a characteristic of the gas treatment system. Wherein said housing is further introduced from the ozone dissolution liquid introducing part has a reservoir for storing ozone solution after contact with the gas to be treated, the solvent supply line group The gas processing system according to claim 1, wherein an end portion is connected to the storage portion. 6. The ozone solution supply mechanism further comprises:
The ozone dissolved liquid in the storage part is transferred to the processing gas introduction line
And / or auxiliary supply to the gas to be treated in the housing
The gas treatment system according to claim 5 , further comprising an auxiliary line . 7. The dust collector according to claim 1 , further comprising a dust collector inserted in the treated gas introduction line .
7. The gas treatment system according to any one of 6 to 6 .