JP2007203171A - Gas cleaning member and gas cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cleaning member easy to manufacture and enhanced in cleaning efficiency, and a gas cleaning device. <P>SOLUTION: The gas cleaning member purifies a harmful substance in an exhaust gas 11 and is composed of a zigzag folded sheet laminate 15 formed by zigzag folding a fiber sheet 12 having a predetermined width and arranging low pressure loss spacers 14 in the space parts 13 between the zigzag folded parts and a frame body 16 for holding the zigzag folded sheet laminate 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gas purification member and a gas purification device that purify harmful substances in exhaust gas.

  Conventionally, a gas purification apparatus using activated carbon fibers has been proposed as a method for removing sulfur oxides in exhaust gas. An example of this gas purification apparatus is shown in FIG. As shown in FIG. 21, the gas purification apparatus is provided in a purification tower 104 through which exhaust gas containing sulfur oxides or product gas 101 circulates, and a catalyst layer 107 formed of an activated carbon fiber layer, and the purification tower. The water supply means 111 is provided in the 104 and supplies the catalyst layer 107 with water for generating sulfuric acid. The product gas 101 is purified by the catalyst layer 107 made of the activated carbon fiber to obtain a purified gas 109 (Patent Document 1). In FIG. 21, reference numeral 121 is a pushing fan for pushing exhaust gas, 111 is a water supply device for supplying cleaning water 105, 115 is humidified cooling water for cooling the exhaust gas, 116 is a humidified cooling device, 108 and 152 are pumps, 153 Is a valve, and 122 is a watering nozzle.

Japanese Patent Laying-Open No. 2005-028216

  Incidentally, as shown in FIG. 22, the activated carbon fiber layer 125 constituting the catalyst layer 107 is composed of a flat activated carbon fiber sheet 126 and a corrugated activated carbon fiber as a catalyst layer used in a conventional gas purification device. There is a problem that the sheet 127 is joined to form a passage 128 having a triangular cross section, and both are joined, so that it takes time to form the sheet. Further, there is a problem that exhaust gas cannot be purified at the joint portion between the two.

  In view of the above problems, an object of the present invention is to provide a gas purification member and a gas purification device that are easy to manufacture and have improved purification efficiency.

  A first invention of the present invention for solving the above-mentioned problems is a gas purification member for purifying harmful substances in exhaust gas, comprising ninety nine folded fiber sheets having a predetermined width. A ninety-nine-fold sheet laminate is formed by disposing low-pressure loss spacers in the space between nineteen folds, and the ninety-nine-fold sheet laminate is held by a frame. It is in the gas purification member characterized by comprising.

  A second invention is a gas purification member for purifying harmful substances in exhaust gas, wherein a fiber sheet having a predetermined width is bent into a U-shaped cross section, and a low-pressure loss spacer is formed in the space between the bent sheets. A U-shaped sheet body unit having a U-shaped cross section is formed, and a U-shaped sheet body unit having a U-shaped cross section and a low-pressure loss spacer are alternately disposed to form a first sheet-like laminate The gas purification member is characterized in that the first sheet-like laminate is held by a frame.

  A third invention is a gas purification member for purifying harmful substances in exhaust gas, wherein a fiber sheet having a predetermined width is folded into a U-shaped cross section, and a low pressure loss spacer is formed in the space between the folded sheets. And forming a U-shaped sheet body unit having a U-shaped cross-section, and alternately forming openings of the U-shaped sheet body unit in the cross-section to form a second sheet-like laminate. The gas purification member is characterized in that the second sheet-like laminate is held by a frame.

  A fourth invention is a gas purification member for purifying harmful substances in exhaust gas, wherein a fiber sheet having a predetermined width is folded into a U-shaped cross section, and a low pressure loss spacer is disposed in the space between the folded sheets. And a U-shaped sheet body unit is formed to form a continuous sheet body unit by alternately arranging openings of the U-shaped sheet body unit, A gas purification member characterized in that a third sheet-like laminate is formed by disposing a low-pressure loss spacer therebetween, and the third sheet-like laminate is held by a frame. .

  A fifth invention is the gas purification member according to any one of the first to fourth inventions, wherein the fiber sheet is an activated carbon fiber sheet.

  A sixth aspect of the present invention is a gas purification apparatus comprising any one of the first to fourth gas purification members in a purification tower in which exhaust gas containing sulfur oxides or product gas flows. .

  According to the present invention, the gas purification member has a simple structure in which the fiber sheet is bent, and the gas purification area is improved, so that the exhaust gas treatment is good.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

A gas purification apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a gas purification member according to an embodiment.
As shown in FIG. 1, the gas purification member 10-1 according to the present embodiment is a gas purification member that purifies harmful substances in the exhaust gas 11, and is formed by folding ninety nine fiber sheets 12 having a predetermined width. A ninety-nine-fold sheet laminate 15 in which low-pressure loss spacers 14 are disposed in the space 13 between the ninety-nine folds, and the ninety-nine fold sheet laminate 15 It consists of the frame 16 to hold | maintain.
In FIG. 1, the exhaust gas 11 is introduced from the lower side of the gas purification member 10-1, and a nozzle 19 for spraying water 17 in a shower shape, for example, is provided from the upper side. It is said.

Next, the outline of the manufacturing process of the gas purification member 10-1 which concerns on a present Example is shown in FIG.
As shown in FIG. 2, first, the continuous fiber sheet 12 is formed into a 99-fold shape, and a low-pressure loss spacer 14 is inserted into the space 13 between the ninety-nine-fold shape on the opening 12 a side. The ninety-nine fold sheet-like laminate 15 is formed.
Next, the ninety-nine folded sheet body 15 is inserted into the frame body 16 and fixed and held as shown in FIG. The ninety-nine folded sheet body 15 held in the frame body 16 is a continuous sheet body, so that leakage of the exhaust gas 11 to be introduced can be avoided.
In addition, unlike a conventional flat sheet and corrugated sheet formed by joining, there is no joined part, and therefore there is no loss of the exhaust gas purification area at the joined part. Moreover, it can also be manufactured at low cost.

  FIG. 3 is a cross-sectional view of a gas purification apparatus in which the gas purification member 10-1 is disposed in the apparatus main body. As shown in FIG. 3, a gas purification member 10-1, which is a one-stage filter, is disposed in the apparatus main body 31 of the gas purification apparatus 30. The gas purification member 10-1 may have a plurality of stages.

Here, the said fiber sheet 12 uses the continuous thing with the width which is about 50-250 cm, for example. The fiber sheet may be a nonwoven fabric or a woven fabric.
Moreover, by making the fiber sheet 12 into an activated carbon fiber sheet, SO ₂ contained in the exhaust gas 11 is converted into sulfurous acid by the catalytic action of the activated carbon fiber in the fiber layer, and diluted sulfuric acid 18 is formed with sprinkled water. The bottom of the main body 31 is washed away.

That is, when activated carbon fiber is used, a desulfurization reaction occurs on the surface by, for example, the following reaction.
That is, (1) sulfur dioxide (SO ₂ ) in the exhaust gas is adsorbed onto the activated carbon fiber layer. (2) Next, oxidation to sulfur trioxide SO ₃ is performed by a reaction between the adsorbed sulfur dioxide (SO ₂ ) and oxygen (O ₂ ) in the exhaust gas (which can be supplied separately). (3) Thereafter, oxidized sulfur trioxide (SO ₃ ) is dissolved in water (H ₂ O), and sulfuric acid (H ₂ SO ₄ ) is generated. (4) The produced sulfuric acid (H ₂ SO ₄ ) is released 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

As a result, in addition to fine particles (SO ₃ mist) in the exhaust gas 11, sulfur dioxide (SO ₂ ) is further adsorbed and oxidized, and reacted with water (H ₂ O) to produce sulfuric acid (H ₂ SO ₄ ). It can be removed and removed to perform desulfurization in the exhaust gas.

  A gas inlet portion 31 a for the exhaust gas 11 is provided on the lower end side of the side wall of the apparatus main body 31. Further, a gas outlet 31b for discharging the purified gas 32 purified by the gas purification member 10-1 is provided on the top side of the apparatus main body 31.

  Further, the gas purification device 30 is provided with a water circulation line 23 and a circulation pump 24 for circulating the dilute sulfuric acid 18 accumulated below the device main body. Further, water 17 is added to the water circulation line 23 by a water supply device (not shown) separately as needed.

As described above, in the present invention, the removal efficiency of SO ₃ mist that is, for example, fine particles in the exhaust gas 11 is dramatically improved by using a continuous sheet in which the gas introduction and exhaust side through which the exhaust gas 11 passes is closed. .

As a result, for example, the removal rate of particulates (dust, SO ₃ mist) in the boiler exhaust gas is stabilized and the removal rate is improved, and the purple smoke from the flue gas discharged from the smoke outlet can be reduced or eliminated. .

A gas purification apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 4 is a schematic diagram illustrating a gas purification member according to an embodiment.
As shown in FIG. 4, the gas purification member 10-2A according to the present embodiment is a gas purification member that purifies harmful substances in the exhaust gas 11, and has an activated carbon fiber sheet 12 having a predetermined width and a predetermined length. And a U-shaped sheet body unit 21 having a U-shaped cross section formed by disposing a low-pressure loss spacer 14 in the space 13 between the folded portions. The body units 21-1 to 21-4 and the low pressure loss spacers 22-1 to 22-3 are alternately arranged to form the first sheet-like laminate 23A. The first sheet-like laminate 23A is fixed and held by the frame 16 in the same manner as the gas purification member of the first embodiment.

  Here, the gas purification member 10-2A shown in FIG. 4 is provided with the opening 12a on the gas introduction side of the U-shaped sheet body unit 21 in section, but as shown in FIG. The gas purifying member 10-2B may be provided by providing an opening 12a.

10-1, FIG. 10-2, FIG. 11-1, FIG. 11-2, FIG. 12-1, and FIG. 12-2. The pressure distribution of the filter when the end of the passage of the letter-shaped sheet body unit 21 is closed will be described.
FIG. 10-1 shows a case where both ends open passages 24 and 24 are adjacent to each other, and FIG. 10-2 is a pressure distribution diagram in the height direction in the passage. In the following description, the hatched portions illustrating the spacers as described above are omitted, and the state in which the exhaust gas 11 actually passes is clearly shown.
FIG. 11A shows a case where the both-end open passage 24 formed by the spacer 22 and the gas introduction side closing passage 25A of the U-shaped sheet body unit 21 having the closing portion at the lower end are adjacent to each other. -2 is a pressure distribution diagram in the height direction in each passage at the moment when the exhaust gas 11 is introduced. In the figure, reference numeral 12b indicates a side wall of the passage.
12A and 12B are pressure distribution diagrams in the height direction in the passages 24 and 25A when the exhaust gas 11 is continuously introduced.

As shown in FIG. 12-2, when the exhaust gas 11 is introduced, there is a difference in the pressure distribution between the both-end open passage 24 and the gas introduction side closing passage 25A, which is resolved when the exhaust gas is continuously introduced. The exhaust gas 11 passing through the both end open passages 24 enters the gas introduction side closing passage 25A.
Thereby, when the fine particles 12 contained in the exhaust gas 11 pass through the side wall 12b, they are collected by the fiber layer of the side wall 12b.

Here, the removal mechanism of SO ₃ mist which is a kind of fine particles in the exhaust gas 11 will be described in more detail.
1) First, by setting the passage 25A having a closed portion, the pressure in the plugged gas introduction side closed passage 25A becomes the outlet pressure on the both-end open passage 24 side.
At this time, the exhaust gas 11 passes through the both-end open channel 24 that is not blocked.
2) In the both-end open passage 24 through which the exhaust gas 11 passes, pressure distribution is generated in the flow direction due to friction loss on the fiber layer surface.
3) A pressure difference is generated through the passage side wall 12b between the both-end open passage 24 through which the exhaust gas 11 passes and the adjacent gas introduction side closing passage 25A.
4) This pressure difference becomes a driving force, and the exhaust gas 11 flows from the both-end open passage 24 through which the exhaust gas 11 passes to the closing passage 25A through the side wall 12b.
5) When the exhaust gas 11 passes through the side wall 12b, SO ₃ mist is removed by the filtering action in the fiber layer constituting the side wall 12b.
As a result, SO ₃ mist which is a kind of fine particles in the exhaust gas 11 is efficiently removed, so that the amount of SO ₃ mist discharged from the chimney is reduced and the generation of purple smoke is reduced.

  In this way, any side surface of the closed passage 24 that closes the gas introduction side is in contact with the open end passage 25A, so that a pressure difference is always generated. The collection is ensured.

Here, the basis weight of the fibrous filter is, for example, 80 to 200 g / m ² , preferably 100 to 150 g / m ² .
The filling rate is preferably 10% or less, more preferably 9% or less.

  The thickness of the fibrous filter is 0.5 to 5.0 mm, preferably 0.8 to 1.6 mm.

As an example, when the basis weight is 120 g / m ² and the thickness of the filter is 0.8 mm, when a blocking portion is provided, the removal rate of SO ₃ mist is 60% and no blocking portion is provided. The removal performance was 1.5 times that of 40% of the case.

  Further, for adjusting the basis weight, a predetermined amount of ultrafine fibers of several μm or 1 μm or less may be blended to improve the collection efficiency of the fine particles.

Next, the mechanism of collecting the fine particles in the exhaust gas 11 in the fiber layer constituting the filter 13 will be described with reference to FIG.
Here, among the fine particles in the exhaust gas 11, for example, for a gas flow rate of about 1 m / s, fine particles of about 0.3 μm or less are collected in the fiber layer by Brown collection, but about 0.3 μm or more. These fine particles are collected in the fiber layer by inertial collision, blocking collision, gravity collection, and the like.
FIG. 13 is a schematic view of brown diffusion collection of submicron fine particles in the fiber layer. As shown in FIG. 13, when the exhaust gas 11 containing fine particles passes through the side wall of the filter fiber, the limit particle locus 62 is determined for each single fiber 61 a constituting the fiber layer 61. The submicron fine particles contained inside are collected by brown diffusion on the surface of a single fiber.
Therefore, the collection efficiency can be improved by appropriately adjusting the basis weight, the filter thickness, and the fiber diameter.

Next, with reference to FIGS. 14-1, 14-2, 15-1 and 15-2, the pressure distribution of the filter when the gas discharge side is a passage 25B closed with a closing portion will be described.
FIG. 14-1 shows a case where the both-end open passage 24 and the gas discharge side blocking passage 25B are adjacent to each other, and FIG. 14-2 shows the pressure in the height direction in each passage at the moment when the exhaust gas 11 is introduced. It is a distribution map.
15-1 and 15-2 are pressure distribution diagrams in the height direction in the respective passages when the exhaust gas 11 is continuously introduced.

As shown in FIG. 15-2, when the exhaust gas 11 is introduced, there is a difference in pressure distribution between the both-end open passage 24 and the gas introduction side closing passage 25B, and if exhaust gas is continuously introduced, it will be solved. As described above, the exhaust gas 11 passing through the gas discharge side blocking passage 25B enters the both ends open blocking passage 24.
Thereby, when the fine particles contained in the exhaust gas 11 pass through the side wall 12b of the filter, they are collected by the fiber layer of the side wall 12b.

  In this way, a pressure difference is always generated by contacting either end of the gas discharge part side closed passage 25B, which is closed on the gas discharge side, so that the pressure difference is generated. The collection is sure.

A gas purification apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 6 is a schematic diagram illustrating a gas purification member according to an embodiment.
As shown in FIG. 6, the gas purification member 10-3 according to the present embodiment is a gas purification member that purifies harmful substances in the exhaust gas 11 and has an activated carbon fiber sheet 12 having a predetermined width in cross section. A U-shaped sheet body unit 21 having a U-shaped cross-section formed by arranging a low-pressure loss spacer 14 in the space 13 between the folded portions, and the U-shaped sheet. The second sheet-like laminate in which the opening portions 12a of the body unit 21 are alternately arranged on the gas introduction side and the discharge side, and the side walls 12b and 12b of the U-shaped sheet body unit are continuously adjacent to each other. 23B is formed. The sheet-like laminate 23B is fixed and held by the frame body 16.

By using such a filter, as shown in FIG. 16, the exhaust gas 11 passes through the side walls 12b, 12b constituting each passage twice, so that the collection efficiency of SO ₃ mist is improved.

FIG. 17 illustrates a case where SO ₃ mist in the exhaust gas is actually collected.
As shown in FIG. 17, the exhaust gas 11 introduced into the gas discharge side blocking passage 25B passes through the side wall 12b of the gas discharge side blocking passage 25B and the side wall 12b of the gas introduction side blocking passage 25A twice. Thus, the collection efficiency of SO ₃ mist is improved.

A gas purification apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 7 is a schematic diagram illustrating a gas purification member according to an embodiment.
As shown in FIG. 7, the gas purification member 10-4A according to the present embodiment is a gas purification member that purifies harmful substances in the exhaust gas 11, and the activated carbon fiber sheet 12 having a predetermined width is cross-sectioned. A U-shaped sheet body unit 21-1 having a U-shaped cross-section is formed by being bent into a U-shape and provided with a low-pressure loss spacer 14 in the space 13 between the bent portions. Further, the opening 12a of the U-shaped sheet body unit 21 is arranged so as to be on the gas introduction side, and the side surfaces of the U-shaped sheet body unit 21 are continuously adjacent to each other (this In the embodiment, a continuous body of three U-shaped sheet body units 21-2, 21-3 and 21-4 and a continuous series of two U-shaped sheet body units 21-5 and 21-6. Body) with spacers 22-1, 22-2 to form a third sheet-like laminate 23C.
The third sheet-like laminate 23C is fixed and held by the frame body 16.
In this embodiment, a continuous body including three U-shaped sheet body units 21-2, 21-3, and 21-4, and two U-shaped sheet body units 21-5 and 21 having a U-shaped section. Although -6 is combined with a continuous continuum, the present invention is not limited to this.

  Here, the gas purification member 10-4A shown in FIG. 7 is provided with the opening 12a of the U-shaped sheet body unit 21-1 on the gas introduction side, but as shown in FIG. An opening 12a may be provided in the gas purification member 10-4B.

  Further, as in the gas purification member 10-4C shown in FIG. 9, the side surfaces of the U-shaped sheet body unit 21 are continuously adjacent to each other (in this embodiment, the U-shaped sheet body unit having two U-shaped sections). Three continuous bodies 21-1 and 21-2 may be used, and these may be interposed by spacers 22-1, 22-2 to form the third sheet-like laminate 23C.

  By adopting the gas purification device using the gas purification member of the present embodiment, the pressure loss in the case where all are closed portions as in the gas purification member 10-3 shown in the third embodiment is intended to be eliminated. . Further, since the spacers 22 are adjacent to each other, the gas inflow efficiency to the side wall 12b described above is also improved.

FIG. 18 illustrates a case where SO ₃ mist in the exhaust gas is actually collected.
As shown in FIG. 18, the exhaust gas 11 introduced into the gas discharge side blocking passage 25B passes through the side wall 12b of the gas discharge side blocking passage 25B and the side wall 12b of the gas introduction side blocking passage 25A twice. Thus, the collection efficiency of SO ₃ mist is improved.
In addition, by providing a both-end open passage 24 made of a spacer (not shown), the exhaust gas 11 is allowed to pass through to reduce pressure loss and prevent clogging due to accumulation of dust during long-time operation. ing.

Here, an embodiment of the flue gas desulfurization system for treating the exhaust gas using the gas purification apparatus according to the present invention will be described with reference to FIG.
As shown in FIG. 19, the flue gas desulfurization system according to the present embodiment includes a boiler 100 that generates steam for driving a steam turbine, a dust remover 101 that removes dust in the exhaust gas 11 from the boiler 100, and dust removal. A push-in fan 102 for supplying the exhausted gas into the gas purification device 30, a humidification cooling device 103 for cooling and increasing the humidity of the exhaust gas 11 before being supplied to the gas purification device 30, and the gas purification member 10-1. 10-2A is disposed in two stages, and the exhaust gas 11 is supplied from the inlet 112a on the side wall of the tower lower part, and the water 17 is supplied from above, so that SOx in the exhaust gas 11 is diluted with dilute sulfuric acid (H ₂ SO ₄ ) and the gas purification device 30 for collecting the SO ₃ mist causes a desulfurization reaction to a chimney 104 for discharging the purified gas 32 desulfurized from the discharge port 112b of the top to the outside, gas purifier 2 From dilute sulfuric acid (H ₂ SO ₄₎ via the pump 110 121 by supplying lime slurry 111 with storing the gypsum reaction tank 112 to precipitate gypsum, and settling tank (thickener) 113 to precipitate gypsum, gypsum slurry 114 is provided with a dehydrator 116 that removes moisture as drainage (filtrate) 117 from 114 to obtain gypsum 115. Note that a mist eliminator 105 may be interposed in the line for discharging the purified purified gas 32 discharged from the gas purification device 30, if necessary, so as to separate moisture in the gas.

Here, in the boiler 100, for example, fuel f such as coal or heavy oil is burned in a furnace in order to generate steam for driving a steam turbine (not shown) of the thermal power generation facility. The exhaust gas of the boiler 100 contains sulfur oxide (SOx). The exhaust gas is denitrated by a denitration device (not shown), cooled by a gas gas heater, and then dedusted by a dust collector 101.
The desulfurization in the exhaust gas 11 can be efficiently performed while supplying a predetermined amount of water 17 in the gas purification device 30.

  In this exhaust gas purification system, the lime slurry 111 is supplied to the dilute sulfuric acid 121 obtained by the gas purification device 30 to obtain the gypsum slurry 114, and then dehydrated to be used as the gypsum 115. The obtained dilute sulfuric acid 121 may be used as sulfuric acid as it is. In that case, a concentration tank for concentrating the diluted sulfuric acid 121 may be provided.

  Further, in the present embodiment, the exhaust gas 11 from the boiler 100 is illustrated, but the exhaust gas to be purified of the present invention is not limited to this, and is exhausted from a gas turbine, an engine, a gasification furnace, and various incinerators. It is good.

Further, as shown in FIG. 20, a mist eliminator 105 is interposed on the downstream side of the humidification cooling device 103 to positively remove moisture mist when the humidity is increased, and extra water is contained in the gas purification device 30. You may make it prevent carrying in of mist (for example, mist of 1 micrometer or more). Thereby, in the gas purification member, the removal efficiency of SO ₃ mist that causes purple smoke can be improved.

The gas purification apparatus according to the present invention can purify not only exhaust gas containing sulfur such as coal, but also exhaust gas containing other harmful dust and harmful mist.
Further, by using activated carbon fibers as a filter, adsorption and removal of harmful components such as SO ₂ and heavy metals (mercury, arsenic, etc.) can be efficiently performed by the chemical catalytic oxidation action.

  As described above, since the gas purification member according to the present invention has a simple structure and the gas purification area is improved, it is suitable for use in an efficient removal process of fine particles.

1 is a schematic view of a gas purification member according to Embodiment 1. FIG. FIG. 3 is a schematic diagram of a manufacturing process of the gas purification member according to the first embodiment. 1 is a schematic view of a gas purification device according to Embodiment 1. FIG. 6 is a schematic view of a gas purification member according to Embodiment 2. FIG. 6 is a schematic view of another gas purification member according to Embodiment 2. FIG. 6 is a schematic view of a gas purification member according to Embodiment 3. FIG. 6 is a schematic view of a gas purification member according to Embodiment 4. FIG. 6 is a schematic view of another gas purification member according to Embodiment 4. FIG. 6 is a schematic view of another gas purification member according to Embodiment 4. FIG. It is the schematic when a both-ends open channel | path is adjacent. It is a pressure distribution figure of the height direction in the passage. It is the schematic when the obstruction | occlusion passage which obstruct | occluded the both-ends open passage and the waste gas introduction side is adjacent. It is a pressure distribution figure of the height direction in each passage at the moment when exhaust gas is introduced. It is the schematic when the obstruction | occlusion passage which obstruct | occluded the both-ends open passage and the waste gas introduction side is adjacent. FIG. 6 is a pressure distribution diagram in the height direction in each passage when exhaust gas is continuously introduced. It is a schematic diagram of collection of fine particles in the fiber layer. It is the schematic when the obstruction | occlusion passage which obstruct | occluded the both-ends open passage and the waste gas discharge side is adjacent. It is a pressure distribution figure of the height direction in each passage at the moment when exhaust gas is introduced. It is the schematic when the obstruction | occlusion passage which obstruct | occluded the both-ends open passage and the waste gas discharge side is adjacent. FIG. 6 is a pressure distribution diagram in the height direction in each passage when exhaust gas is continuously introduced. It is sectional drawing of a side wall. 6 is a schematic diagram for collecting SO ₃ mist in exhaust gas using the gas purification member of Example 3. FIG. 6 is a schematic diagram for collecting SO ₃ mist in exhaust gas using the gas purification member of Example 4. FIG. 6 is a schematic view of a desulfurization system of Example 5. FIG. It is the schematic of the other flue gas desulfurization system of Example 5. FIG. It is the schematic of the conventional gas purification apparatus. It is the schematic of the conventional filter.

Explanation of symbols

10-1 10-2A, 10-2B, 10-3, 10-4A, 10-4B Gas purification member 11 Exhaust gas 12 Fiber sheet 13 Space part 14 Spacer 15 Ninety-nine-fold sheet laminate 21-1 to 21- 5 U-shaped sheet body unit 22-1 to 22-3 spacer 23A 1st sheet-like laminated body 23B 2nd sheet-like laminated body 23C 3rd sheet-like laminated body

Claims (6)

A gas purification member that purifies harmful substances in exhaust gas,
Ninety-nine folds of fiber sheets having a predetermined width are formed, and a ninety-nine-folded sheet laminate is formed by disposing low-pressure loss spacers in the space between the ninety-nine folds. And a gas purification member characterized in that the 99-fold sheet laminate is held by a frame. A gas purification member that purifies harmful substances in exhaust gas,
A fiber sheet having a predetermined width is folded into a U-shaped cross section, and a low-pressure loss spacer is disposed in the space between the folded sheets to form a U-shaped sheet body unit. A U-shaped sheet body unit and a low-pressure loss spacer are alternately arranged to form a first sheet-like laminate, and the first sheet-like laminate is held by a frame. A gas purification member. A gas purification member that purifies harmful substances in exhaust gas,
A fiber sheet having a predetermined width is folded into a U-shaped cross section, and a low-pressure loss spacer is disposed in the space between the folded sheets to form a U-shaped sheet body unit. The openings of the U-shaped sheet body units are alternately arranged to form a second sheet-like laminate, and the second sheet-like laminate is held by a frame. Gas purifying member. A gas purification member that purifies harmful substances in exhaust gas,
A fiber sheet having a predetermined width is folded into a U-shaped cross section, and a low-pressure loss spacer is disposed in the space between the folded sheets to form a U-shaped sheet body unit.
The openings of the U-shaped sheet body units are alternately arranged to form a continuous sheet body unit, and a low-pressure loss spacer is arranged between the continuous sheet body units to form a third sheet-like laminate. A gas purification member formed and formed by holding the third sheet-like laminate with a frame. In any one of Claims 1 thru | or 4,
The gas purification member, wherein the fiber sheet is an activated carbon fiber sheet.   A gas purification apparatus comprising the gas purification member according to any one of claims 1 to 4 in a purification tower in which exhaust gas containing sulfur oxides or product gas flows.

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