JP2003126690A - Flue gas treating system and desulfurization method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a catalyst tank 6 containing activated carbon fiber layers 20 to which water is uniformly added. SOLUTION: A water reservoir 25 is installed near the activated carbon fiber layers 20 and strings 26 through which water permeates from the inside of the water reservoir 25 to upper parts of a flat plated activated carbon fiber sheet 21 and a corrugated plate activated carbon fiber sheet 22. The water permeates uniformly to the carbon fiber sheet through all passages 15. The catalyst tank 6 containing the activated carbon fiber layers 20 in which the water is uniformly fed and added, is formed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an exhaust gas for removing sulfur oxides (SO _x ) in exhaust gas discharged from a boiler, a gas turbine, an engine, an incinerator, etc. that burns fuel such as coal and heavy oil. Smoke treatment device. Further, the present invention is
The present invention relates to a desulfurization method for removing sulfur oxides (SO _x ) in exhaust gas.

[0002]

2. Description of the Related Art Emissions from thermal power plants equipped with boilers that use fuels such as coal and heavy oil, chemicals manufacturing plants, metal processing plants, sintering plants, paper plants, gas turbines, engines, incinerators, etc. The exhaust gas contains sulfur oxides (SO _x ) such as sulfur dioxide. A flue gas treatment device is used as a device for removing SO _x in exhaust gas. In a flue gas treatment device, SO _x in exhaust gas is adsorbed on a porous carbon material such as activated carbon fiber, and the sulfur component is oxidized by oxygen contained in the exhaust gas by utilizing the catalytic action of the porous carbon material. Is absorbed into water to be removed as sulfuric acid from the porous carbon material.

[0003]

A conventional flue gas treatment apparatus is provided with, for example, a catalyst tank in which a flat sheet-like activated carbon fiber and a corrugated sheet-like activated carbon fiber are alternately laminated. Water is dropped on the fibers and the exhaust gas is passed through the passage between the sheets to remove sulfur as sulfuric acid. Therefore, exhaust gas purification performance (desulfurization efficiency)
In order to improve the water content, it is necessary to add water uniformly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a flue gas treatment apparatus provided with a catalyst tank of an activated carbon fiber layer to which water is uniformly added.

The present invention has been made in view of the above situation, and provides a desulfurization method capable of removing sulfur oxides (SO _x ) by uniformly adding water to an activated carbon fiber layer. To aim.

[0006]

The structure of the flue gas treatment apparatus of the present invention for achieving the above object is formed by an activated carbon fiber layer provided in an apparatus tower through which exhaust gas containing sulfur oxide flows. In a flue gas treatment apparatus comprising a catalyst tank that is provided in the apparatus tower above the catalyst tank, and water supply means that supplies water for sulfuric acid generation to the catalyst tank, a flat plate-like activated carbon fiber sheet and a corrugated plate are provided. The corrugated activated carbon fiber sheets are alternately laminated to form the activated carbon fiber layers of the catalyst tank by vertically extending the passages, and the water supply means activates water through the capillary permeation member. It is characterized by including a permeation means for supplying to the upper part of the carbon fiber layer.

The capillary permeation member of the permeation means is a cloth material. Further, the capillary permeation member of the permeation means is a string material.

Further, the structure of the flue gas treatment apparatus of the present invention for achieving the above object is a catalyst tank formed of an activated carbon fiber layer provided in an apparatus tower through which exhaust gas containing sulfur oxide flows. In a flue gas treatment apparatus comprising a water supply means for supplying water for sulfuric acid generation to the catalyst tank, which is provided in the apparatus tower at the upper part of the catalyst tank, a flat plate-like activated carbon fiber sheet and a corrugated plate-like corrugated plate The activated carbon fiber sheets of the catalyst tank are formed by alternately laminating the activated carbon fiber sheets so that the passages extend vertically, and the water supply means sprays water in a mist state on the upper wall surface of the activated carbon fiber layer. It is characterized by being a spraying means for directly spraying.

A plurality of activated carbon fiber layers are vertically arranged to form a catalyst tank, and a capillary permeation member is interposed between the activated carbon fiber layers.

The desulfurization method of the present invention for attaining the above-mentioned object is to desulfurize by supplying exhaust gas containing sulfur oxide to a catalyst tank formed of an activated carbon fiber layer and supplying water for producing sulfuric acid. In the desulfurization method to be performed, water is supplied to the catalyst tank by capillary infiltration.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of an exhaust gas treatment system equipped with a flue gas treatment apparatus according to one embodiment of the present invention, and FIG. 2 shows the entire exhaust gas treatment system according to another embodiment. The structure, FIG. 3 is a front view of a main part of the activated carbon fiber layer constituting the catalyst tank, FIG. 4 is a partial perspective view of the upper part of the activated carbon fiber layer, FIG. 5 is a sectional state of the activated carbon fiber layer, and FIG. FIG. 7 shows a cross-sectional state of the activated carbon fiber layer according to another embodiment, and FIG. 7 shows a cross section of the activated carbon fiber sheet.

An exhaust gas treatment system equipped with an exhaust gas treatment device will be described with reference to FIG.

As shown in the figure, for example, in a boiler 1 for generating steam for driving a steam turbine (not shown) of a thermal power generation facility, a fuel f such as coal or heavy oil is burned in a furnace. . The exhaust gas of the boiler 1 contains sulfur oxides (SO _x ), and the exhaust gas is denitrated by a denitration device (not shown), cooled by a gas gas heater, and then dedusted by a dust collector 2.

The exhaust gas from which dust has been removed is sent to the humidification cooling device 16 by the push-in pump 3, and the moisture (containing dilute sulfuric acid) is mixed in the humidification cooling device 16 to form saturated vapor exhaust gas.
At this time, the exhaust gas may contain mist. Exhaust gas in the form of saturated vapor from the humidifying and cooling device 16 is introduced into the desulfurization tower 4 as an equipment tower from the lower inlet 5.
A catalyst tank 6 formed of an activated carbon fiber layer is provided inside the desulfurization tower 4, and water for sulfuric acid generation is supplied to the catalyst tank 6 from an upper capillary permeation member 7. Water from the water tank 8 is supplied to the capillary infiltration member 7 via a pump 9, and the capillary infiltration member 7, the water tank 8 and the pump 9 constitute a water supply means.

By passing the exhaust gas from the lower part into the inside of the catalyst tank 6 in which water is sprayed from the upper part,
Remove _x by reaction. The exhaust gas that has passed through the catalyst tank 6 is exhausted from the exhaust port 12, and the exhaust gas is released to the atmosphere through the chimney 13 while the mist is removed by the mist eliminator 19 and white smoke is suppressed. In addition, mist eliminator 19
May not be provided.

On the surface of the activated carbon fiber layer of the catalyst tank 6, a desulfurization reaction occurs by the following reaction, for example. (1) Adsorption of sulfur dioxide SO ₂ on the activated carbon fiber layer of the catalyst tank 6. (2) Oxidation to sulfur trioxide SO ₃ by the reaction of the adsorbed sulfur dioxide SO ₂ and oxygen O ₂ in the exhaust gas (it can be supplied separately). (3) Generation of sulfuric acid H ₂ SO ₄ by dissolution of oxidized sulfur trioxide SO ₃ in water H ₂ O. (4) Desorption of the generated sulfuric acid H ₂ SO _{4 from} the activated carbon fiber layer.

The reaction formula at this time is as follows. SO ₂ + 1 / 2O ₂ + H ₂ O → H ₂ SO ₄

The sulfuric acid H ₂ SO _{4 that} has been removed by the reaction becomes dilute sulfuric acid and is discharged to the sulfuric acid tank 11 via the discharge pump 10. In this way, sulfur dioxide SO ₂ in the exhaust gas is adsorbed and oxidized in the catalyst tank 6 and reacted with water H ₂ O to form sulfuric acid H ₂ SO.
Desulfurization of the exhaust gas stream is performed by generating ₄ and removing and removing it.

Another embodiment of the exhaust gas treatment system will be described with reference to FIG. In addition, the same components as those of the exhaust gas treatment system shown in FIG.

The exhaust gas treatment system shown in FIG. 2 converts sulfur oxides in exhaust gas into sulfuric acid by desulfurization in a desulfurization device,
A lime slurry is supplied to sulfuric acid to produce gypsum.

As shown in the figure, dilute sulfuric acid is stored from the desulfurization tower 4 via the discharge pump 10 and the lime slurry 51 is stored.
A gypsum reaction tank 52 for supplying gypsum to deposit gypsum is provided, and a settling tank (thickener) 53 for sedimenting the gypsum deposited in the gypsum reaction tank 52 is provided. The gypsum slurry 54 from the settling tank (thickener) 53 is sent to a dehydrator 56, and water is removed by the dehydrator 56 to obtain gypsum 55.

In the exhaust gas treatment system of FIG. 1, the sulfuric acid obtained by desulfurization is used as sulfuric acid as it is, but in the exhaust gas treatment system of FIG.
Is supplied to obtain the gypsum slurry 54, which is then dehydrated to obtain the gypsum 5
It is used as 5.

The structure of the activated carbon fiber layer in the catalyst tank 6 will be described with reference to FIGS. 3 to 7.

The activated carbon fiber layer 20 is formed by alternately laminating a flat plate-shaped activated carbon fiber sheet 21 and a corrugated corrugated plate activated carbon fiber sheet 22 having V-shaped waves. The linear space that forms the passage 15 is a state in which the passage 15 extends vertically. The flat-plate activated carbon fiber sheet 21 and the corrugated activated carbon fiber sheet 22 are made of cotton-like activated carbon fibers of pitch type, phenol type, or the like made into a plate shape using a binder, and the corrugated activated carbon fiber sheet 22 is corrugated by a corrugator. Typed. Then, it is heat-treated at 600 ° C. to 1200 ° C. in a non-oxidizing atmosphere such as nitrogen gas to obtain an activated carbon fiber for desulfurization reaction. That is, the surface is made to have a large hydrophobicity by the heat treatment to easily cause the adsorption of sulfur dioxide SO ₂ and to promptly promote the release of the generated sulfuric acid H ₂ SO ₄ .

Heat-treated flat plate activated carbon fiber sheet 2
1 and the corrugated plate activated carbon fiber sheet 22 are alternately laminated, and the peak portion of the corrugated plate activated carbon fiber sheet 22 and the flat plate activated carbon fiber sheet 21 are joined by fusion bonding of the binder to form a pack of a predetermined size. . Since the corrugated sheet activated carbon fiber sheet 22 and the flat sheet activated carbon fiber sheet 21 are joined by fusion bonding of the binder, an adhesive such as an organic substance is not used.
For this reason, the adhesive does not affect the desulfurization reaction, and the reliability of the bonding is improved, and the influence on the pressure loss can be eliminated.

For example, four packs of the activated carbon fiber layers 20 are lined up with the passage 15 in the vertical direction, and four packs of the activated carbon fiber layers 20 are stacked in two stages and housed and fixed in the case. . That is, a plurality of activated carbon fiber layers 20 are vertically arranged to form the catalyst tank 6. For this reason, one activated carbon fiber layer 20 can be downsized, and the assembling property is improved.

As shown in FIG. 4, the pitch p between the flat activated carbon fiber sheets 21 is set to, for example, about 4 mm,
The width h of the crests of the corrugated activated carbon fiber sheet 22 is set to about 10 mm. Then, water having a particle size of about 200 μm is sprayed and supplied from the top, and exhaust gas is sent from the bottom, and the water flowing through the activated carbon fiber layer 20 has a particle size of about several mm, and the water in the desulfurization tower 4 is discharged. Fall to the bottom. Since the exhaust gas flows through the relatively small passage 15 formed by alternately stacking the flat plate activated carbon fiber sheets 21 and the corrugated plate activated carbon fiber sheets 22, the increase in pressure loss is suppressed. .

When SO _{3 obtained} by oxidizing SO _{2 on the} surface of the activated carbon fiber is discharged as sulfuric acid due to water, if the water is insufficient, it cannot be discharged as sulfuric acid and the next oxidation of SO ₂ is insufficient. Become. On the other hand, if the water content is excessive, the sulfuric acid will be diluted. Furthermore, if the water content becomes excessive and, for example, if a water film or water wall is formed on the surface of the activated carbon fiber, it will cover the active sites of the activated carbon fiber, and it will not be able to catalyze the oxidation of SO ₂ and desulfurize. And the desulfurization efficiency will decrease.

Therefore, the amount of water when the exhaust gas comes into contact with the activated carbon fiber layer 20 in the catalyst tank 6 is as follows:
Water of about 200 μm is sprayed and supplied, and the water flowing through the activated carbon fiber layer 20 has a particle size of about several mm and is set to fall to the lower part of the desulfurization tower 4. As a result, depending on the situation of the exhaust gas, water droplets intermittently roll off in a ball shape, so that water is supplied to the surface of the activated carbon fiber without excess or deficiency, and sulfuric acid is efficiently desorbed. become. As a result, the desulfurization of the exhaust gas is effectively performed.

As shown in FIG. 6A, a corrugated plate activated carbon fiber sheet 31 in which waves are continuous in a U shape is formed, and the corrugated plate activated carbon fiber sheets 31 are arranged in the same direction to activate the corrugated plate. It is also possible to alternately stack the carbon fiber sheets 31 and the flat plate activated carbon fiber sheets 21. Further, as shown in FIG. 6 (B), the directions of the corrugated sheet activated carbon fiber sheets 31 may be alternately arranged and the corrugated sheet activated carbon fiber sheets 31 and the flat plate activated carbon fiber sheets 21 may be alternately laminated. is there.
Further, as shown in FIG. 6 (C), it is possible to form fine irregularities 32 on the surface of the corrugated plate activated carbon fiber sheet 31.

As shown in FIG. 7, the flat plate activated carbon fiber sheet 21 and the corrugated activated carbon fiber sheets 22 and 31 are laminated plates in which a burnt paper sheet 35 is adhered to both surfaces of a core material 34. It is said to be a state. Incidentally, it is also possible to adopt a configuration without the core material 34.

Based on FIGS. 3 and 4, the activated carbon fiber layer 20.
The configuration of the capillary permeation member 7 that supplies water to the will be described.

As shown in the figure, a water tank 25 to which water is sent from a water tank 8 and a pump 9 is installed in the vicinity of the activated carbon fiber layer 20, and the inside of the water reservoir 25 and the flat activated carbon fiber sheet 21 and the wave are installed. A string material 26, which is a constituent element of a capillary permeation member that allows water to permeate, is provided over the plate activated carbon fiber sheet 22. The water stored in the water reservoir 25 permeates the string material 26 and is directly supplied to the flat plate activated carbon fiber sheet 21 and the corrugated plate activated carbon fiber sheet 22.
Water permeates the carbon fiber sheet for No. 5 uniformly.

It is also possible to arrange the cord material 26 along the periphery of the upper end surface of the activated carbon fiber layer 20 (the periphery of the end portion of the passage 15).

For this reason, water is supplied to the flat plate activated carbon fiber sheet 21 and the corrugated plate activated carbon fiber sheet 22 through the cord material 26 without being affected by the flow velocity of the exhaust gas, etc. It becomes possible to make the catalyst tank 6 of the activated carbon fiber layer 20 in which water is uniformly supplied and water is uniformly added. Then, the cost can be suppressed by using the string material 26.

When arranging the water reservoir 25 and the cord material 26 in the actual catalyst tank 6, the water reservoir 25 and the cord material 26 are installed at a portion which does not cause a pressure loss in the flow of the exhaust gas.

As the structure of the capillary permeation member, a flat plate activated carbon fiber sheet 21 and a corrugated plate activated carbon fiber sheet 22 are formed by using a sprinkler or a pipe-shaped shower (spraying means).
Water is directly supplied to the upper part of the flat plate activated carbon fiber sheet 21
Also, the upper part itself of the corrugated plate activated carbon fiber sheet 22 can be used as the capillary permeation member. In addition, the activated carbon fiber layer 2
When 0 is accommodated in the frame, the frame can be applied as a pipe-shaped shower. When water is supplied to the upper portions of the flat plate activated carbon fiber sheet 21 and the corrugated plate activated carbon fiber sheet 22 by using a sprinkler or a shower, water is supplied by providing a baffle plate or the like so that the water is not scattered by the exhaust gas flow from the bottom. Becomes smooth.

Another embodiment of the capillary penetrating member will be described with reference to FIG. FIG. 8 shows a front view of a main part of an activated carbon fiber layer provided with a capillary permeation member according to another embodiment.
The same members as the constituent members shown in FIG. 3 are designated by the same reference numerals, and the duplicate description is omitted.

As shown in the figure, a jet nozzle 28 to which water is sent from a water tank 8 and a pump 9 is installed in the vicinity of the activated carbon fiber layer 20, and below the jet nozzle 28, there are constituent elements of a capillary penetrating member. For example, a strip-shaped cloth material 29 is arranged. The edge of the cloth material 29 is a flat activated carbon fiber sheet 2
1 and the upper part of the corrugated plate activated carbon fiber sheet 22. Water is jetted from the jet nozzle 28 to the cloth material 29, permeates the cloth material 29, and is directly supplied to the flat plate activated carbon fiber sheet 21 and the corrugated plate activated carbon fiber sheet 22.
Water permeates the carbon fiber sheet for No. 5 uniformly.

It is also possible to arrange the cloth material 29 along the periphery of the upper end surface of the activated carbon fiber layer 20 (the periphery of the end portion of the passage 15).

Therefore, water is supplied to the flat plate activated carbon fiber sheet 21 and the corrugated plate activated carbon fiber sheet 22 through the cloth material 29 without being affected by the flow velocity of the exhaust gas, etc., and the whole activated carbon fiber layer 20 is covered. It becomes possible to make the catalyst tank 6 of the activated carbon fiber layer 20 in which water is uniformly supplied and water is uniformly added. Further, the cost can be suppressed by using the cloth material 29.

Another embodiment of the capillary penetrating member will be described with reference to FIG. FIG. 9 shows a front view of a main part of an activated carbon fiber layer provided with a capillary permeation member according to another embodiment.
The same members as the constituent members shown in FIG. 3 are designated by the same reference numerals, and the duplicate description is omitted.

In the illustrated embodiment, the activated carbon fiber layer 20 is used.
The case where the packs are stacked in two layers has been described.
The activated carbon fiber layers 20 are vertically arranged in two stages to form the catalyst tank 6, and a string material 26, which is a constituent element of a capillary permeation member through which water permeates, is provided between the activated carbon fiber layers 20. The water stored in the water reservoir 25 permeates the string material 26 and is directly supplied to the upper activated carbon fiber layer 20, and the water dropped from the upper activated carbon fiber layer 20 permeates the string material 26 and activates the lower active material. Water is directly supplied to the flat plate activated carbon fiber sheet 21 and the corrugated activated carbon fiber sheet 22 of the carbon fiber layer 20, and even in the lower activated carbon fiber layer 20, water uniformly permeates the carbon fiber sheets for all the passages 15.

For this reason, even if the activated carbon fiber layers 20 are arranged in two stages, the flat plate activated carbon of the activated carbon fiber layers 20 above and below the water is passed through the string material 26 without being affected by the flow rate of the exhaust gas. The catalyst tank 6 of the activated carbon fiber layer 20 is supplied to the fiber sheet 21 and the corrugated activated carbon fiber sheet 22, and water is uniformly supplied to the entire upper and lower activated carbon fiber layers 20 to uniformly add water. It will be possible.

It is also possible to connect the upper and lower activated carbon fiber layers 20 with the cloth material 29 shown in FIG. In addition, the water is supplied to the upper activated carbon fiber layer 20 through the cloth material 29 shown in FIG. 8 and, of course, a flat activated carbon fiber sheet is formed by using a sprinkler or a pipe-shaped shower (spraying means). Water may be directly supplied to the upper portions of the corrugated sheet activated carbon fiber sheet 21 and the corrugated sheet 22.

Therefore, the flue gas treatment apparatus described above can be provided with the flue gas treatment apparatus including the catalyst tank 6 of the activated carbon fiber layer 20 to which water is uniformly added. In addition, the desulfurization method described above can be a desulfurization method capable of uniformly adding water to the activated carbon fiber layer 20 to remove the sulfur oxide (SO _x ).

[0047]

EFFECTS OF THE INVENTION The flue gas treatment apparatus of the present invention comprises a catalyst tank formed of an activated carbon fiber layer provided in an apparatus tower through which exhaust gas containing sulfur oxide flows, and an apparatus tower in the upper part of the catalyst tank. In a flue gas treatment apparatus comprising a water supply means for supplying sulfuric acid-producing water to a catalyst tank, a flat plate-like activated carbon fiber sheet and a corrugated plate-like activated carbon fiber sheet are alternately laminated. Then, the activated carbon fiber layer of the catalyst tank is constituted by making the passage extend vertically, and the water supply means is
Since the permeation means for supplying water to the upper part of the activated carbon fiber layer through the capillary permeation member is included, water is supplied to the flat plate activated carbon fiber sheet and the corrugated activated carbon fiber sheet through the permeation means to activate the activated carbon fiber sheet. It becomes possible to provide a catalyst tank for an activated carbon fiber layer in which water is uniformly supplied to the entire carbon fiber layer to uniformly add water.

Since the capillary permeation member of the permeation means is a cloth material, the cost can be suppressed. Also,
Since the capillary penetrating member of the penetrating means is a string material, it is possible to reduce costs.

Further, the flue gas treatment apparatus of the present invention is provided with a catalyst tank formed of an activated carbon fiber layer provided in an apparatus tower through which exhaust gas containing sulfur oxide flows, and an inside of the apparatus tower above the catalyst tank. In a flue gas treatment apparatus comprising a water supply means for supplying sulfuric acid-producing water to a catalyst tank, a flat plate-like activated carbon fiber sheet and a corrugated plate-like activated carbon fiber sheet are alternately laminated. Then, the activated carbon fiber layer of the catalyst tank is configured by making the passage extend vertically, and the water supply means is a spray means for directly spraying water in the form of mist on the upper wall surface of the activated carbon fiber layer. Water is directly supplied to the flat plate activated carbon fiber sheet and the corrugated plate activated carbon fiber sheet through the spraying means, and the water is uniformly supplied to the entire activated carbon fiber layer to uniformly add water to the activated carbon fiber layer. It becomes possible to make it a catalyst tank.

Since a plurality of activated carbon fiber layers are arranged one above the other to form a catalyst tank, and the capillary permeation member is interposed between the activated carbon fiber layers, the activated carbon fiber layers are formed for downsizing. Even if arranged in two stages, water is supplied to the flat plate activated carbon fiber sheet and the corrugated plate activated carbon fiber sheet of the upper and lower activated carbon fiber layers through the capillary permeation member without being affected by the flow rate of exhaust gas, etc. It becomes possible to provide a catalyst tank for the activated carbon fiber layer in which water is uniformly supplied to the entire upper and lower activated carbon fiber layers to uniformly add water.

The desulfurization method of the present invention is a desulfurization method in which exhaust gas containing sulfur oxides is circulated through a catalyst tank formed of an activated carbon fiber layer and water for sulfuric acid is supplied to perform desulfurization. Thus, since water is supplied to the catalyst tank, it is possible to provide a desulfurization method capable of uniformly adding water to the activated carbon fiber layer to remove sulfur oxides.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an exhaust gas treatment system including an exhaust gas treatment device according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of an exhaust gas treatment system according to another embodiment example.

FIG. 3 is a front view of a main portion of an activated carbon fiber layer that constitutes a catalyst tank.

FIG. 4 is a partial perspective view of an upper portion of an activated carbon fiber layer.

FIG. 5 is a cross-sectional view of an activated carbon fiber layer.

FIG. 6 is a sectional view of an activated carbon fiber layer according to another embodiment.

FIG. 7 is a sectional view of an activated carbon fiber sheet.

FIG. 8 is a front view of a main part of an activated carbon fiber layer including a capillary penetrating member according to another embodiment.

FIG. 9 is a front view of a main part of an activated carbon fiber layer provided with a capillary permeation member according to another embodiment.

[Explanation of symbols]

1 boiler 2 dust collector 3 push pump 4 Desulfurization tower 5 entrance 6 catalyst tank 7 Capillary penetrating member 8 water tanks 9 pumps 10 discharge pump 11 Sulfuric acid tank 12 outlet 13 chimney 15 passages 16 Humidification cooling device 20 Activated carbon fiber layer 21 Flat plate activated carbon fiber sheet 22,31 Corrugated activated carbon fiber sheet 25 water pool 26 string material 32 uneven shape 34 core material 35 Burnt paper sheet 51 lime slurry 52 Gypsum reaction tank 53 Settling tank 54 gypsum slurry 55 plaster

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F01N 3/04 F02C 7/00 B 3/08 B01D 53/36 ZABD 3/28 301 F23J 15/00 B F02C 7/00 HF23J 15/00 B01D 53/34 125K (72) Inventor Takashi Kurisaki 1-1 1-1 Atsunoura-machi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Keiko Kobayashi Chiyoda-ku, Tokyo 2-5-1, Marunouchi San-Ryoju Kogyo Co., Ltd. F-term (reference) 3G091 AA06 AB11 AB15 BA13 GA06 GB16W GB16Y 3K070 DA03 DA23 DA26 DA35 DA40 4D002 AA02 AC01 AC02 AC04 AC10 BA02 BA05 BA14 BA16 CA01 CA07 CA20 DA35 DA44 A02 4D048 AB01 AC10 BA05X BB02 BB08 CD03 4G069 AA02 AA11 BA08A BA08B CA02 CA07 CA12 DA06 EA09 EA10 EA21

Claims (6)

[Claims] 1. A catalyst tank provided with an activated carbon fiber layer in an apparatus tower through which an exhaust gas containing sulfur oxide flows, and a catalyst tank provided in the apparatus tower above the catalyst tank for producing sulfuric acid. In a smoke exhaust treatment apparatus comprising water supply means for supplying water, a flat plate-like activated carbon fiber sheet and a corrugated plate-like activated carbon fiber sheet are alternately laminated to form a state in which a passage extends vertically. By doing so, the activated carbon fiber layer of the catalyst tank is constituted, and the water supply means includes a permeation means for supplying water to the upper part of the activated carbon fiber layer via the capillary permeation member. 2. The flue gas treatment device according to claim 1, wherein the capillary permeation member of the permeation means is a cloth material. 3. The flue gas treatment device according to claim 1, wherein the capillary permeation member of the permeation means is a cord material. 4. A catalyst tank provided with an activated carbon fiber layer in an apparatus tower through which an exhaust gas containing sulfur oxide flows, and a catalyst tank provided in the apparatus tower above the catalyst tank for producing sulfuric acid. In a smoke exhaust treatment apparatus comprising water supply means for supplying water, a flat plate-like activated carbon fiber sheet and a corrugated plate-like activated carbon fiber sheet are alternately laminated to form a state in which a passage extends vertically. By doing so, the activated carbon fiber layer of the catalyst tank is configured, and the water supply means is a spraying means for directly spraying water in a mist state on the upper wall surface of the activated carbon fiber layer. 5. The catalyst tank according to any one of claims 1 to 4, wherein a plurality of activated carbon fiber layers are vertically arranged to form a catalyst tank, and a capillary permeation member is interposed between the activated carbon fiber layers. A flue gas treatment device characterized in that 6. A desulfurization method in which an exhaust gas containing sulfur oxides is circulated through a catalyst tank formed of an activated carbon fiber layer and desulfurization is performed by supplying water for producing sulfuric acid, wherein water is supplied to the catalyst tank by capillary infiltration. A desulfurization method, characterized in that