JP2007222825A - Gas purifying member and gas purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas purifying member easy to manufacture and enhanced in purification efficiency, and gas purifier. <P>SOLUTION: The gas purifying member for purifying a harmful substance in an exhaust gas 11 is constituted by alternately laminating fiber sheets 12A, first spacers 14A-1 being structure sheets and second spacers 14A-2. Gas closing parts 16 are formed to the end surfaces of the first spacers 14A-1 so as to be provided on the gas discharge side of the first spacers 14A-1. The fiber sheets 12A and the first and second spacers 14A-1 and 14A-2 are laminated so that the lamination direction of them becomes a vertical axis direction same to the introducing direction of the exhaust gas 11. <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. 25, the gas purification apparatus is provided in a purification tower 104 through which exhaust gas containing sulfur oxides or product gas 101 flows, 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. 25, 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 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

  By the way, as a catalyst layer used in the conventional gas purification apparatus, as shown in FIG. 26, 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. 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.

  Further, in the conventional filter having a triangular cross section, as shown in FIG. 26, a flat activated carbon fiber sheet 126 and a corrugated activated carbon fiber sheet 127 are bonded together to form a corrugated cardboard, which is superposed to increase the strength. I try to secure it.

  In forming the corrugated board, there is a problem that if the sheet is hard, it is easy to mold, but if it is soft, it is difficult to mold.

  Further, the added water and the water mist in the gas trapped in the fiber layer are more easily removed from the fiber layer as the porosity of the fiber layer is larger (the sheet becomes softer as the porosity is larger). For this reason, corrugated board becomes a problem to improve performance.

The added water and the water mist in the gas captured by the fiber layer have the following effects.
1) It is immersed in the fiber layer, and as shown in FIG. 27, a water immersion part 131 is formed and the filter function is reduced, so that it is difficult to collect SO ₃ mist.
2) With the immersion of water in the fiber layer, the surface is covered with water and the reaction is inhibited, so that the SO ₂ oxidation removal action becomes difficult.
3) In the case of a counter flow (for example, the exhaust gas is directed from the bottom to the top and the water 105 having been sprinkled is directed from the top to the bottom), as shown in FIG. Occurs and hinders the discharge of water in the fiber layer and increases the pressure loss of the honeycomb.

  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 problem is a gas purification member for purifying harmful substances in exhaust gas, wherein a fiber sheet and a structure sheet are alternately laminated, and the structure The gas purification member is characterized in that a gas blocking portion is formed on the end face of the body sheet.

  According to a second invention, in the first invention, the structure sheet includes a first spacer in which a gas blocking portion is formed on an end surface on a gas discharge side thereof, and a second spacer through which gas can pass. In the gas purification member, a plurality of first spacers and second spacers are alternately arranged, and a fiber sheet is sandwiched between them.

  According to a third invention, in the first invention, the structure sheet includes a third spacer in which a gas closing portion is formed on an end surface on a gas introduction side thereof, and a second spacer through which a gas can pass. In the gas purification member, a plurality of third spacers and second spacers are alternately arranged, and a fiber sheet is sandwiched between them.

  According to a fourth invention, in the first invention, the structure sheet includes a first spacer in which a gas blocking portion is formed on an end surface on the gas discharge side, and a gas blocking portion 16 on the end surface on the gas introduction side. The gas purification member is characterized in that a plurality of the first spacers and the third spacers are alternately arranged, and a fiber sheet is sandwiched between them.

  A fifth invention is the gas purification member according to any one of the second to fourth inventions, wherein the spacer is flat and the fiber sheet is flat.

  According to a sixth aspect of the present invention, in any one of the second to fourth aspects, the spacer has a triangular shape having a triangular cross section, and the fiber sheet has a zigzag shape along the continuous triangular shape. It exists in the gas purification member characterized.

  A seventh invention is the gas purification member according to any one of the second to fourth inventions, wherein the spacer has a corrugated cross section and the fiber sheet has a corrugated shape along the continuous corrugated shape.

  An eighth invention is the gas purification member according to any one of the second to fourth inventions, wherein the spacer has a prismatic shape, and the fiber sheet has a zigzag shape alternately sandwiching the prismatic spacers. It is in.

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

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

  According to the present invention, since it is a gas purification member having a simple structure in which a fiber sheet and a spacer which is a gas flow member are laminated and a gas blocking portion is formed on an end surface of the structure sheet, the manufacture is It becomes easy and the exhaust gas treatment becomes 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 includes a first spacer 14A that is a fiber sheet 12 and a structure sheet. -1 and second spacers 14A-2 are alternately stacked, and a gas blocking portion 16 is formed on the end face of the first spacer 14A-1. The first spacer 14A-1 is provided with a closing portion 16 on the gas discharge side.

In the present embodiment, the stacking direction of the fiber sheet 12A and the first and second spacers 14A-1 and 14-2 is orthogonal to the direction in which the exhaust gas 11 is introduced.
In FIG. 1, these laminates are housed in the frame 13, and the exhaust gas 11 is introduced from the lower side of the gas purification member 10-1, and the water is injected from the upper side by, for example, a nozzle 19 that sprays like a shower. 17 is watered, and the gas purification member 10-1 is in a wet state.

Next, the outline of the structure of the gas purification member 10-1 which concerns on a present Example is shown to FIGS. 2-1 to 2-3. FIG. 2-1 is a block diagram of one unit constituting the gas purification member, FIG. 2-2 is a plan view of the gas purification member, and FIG. 2-3 is a cross-sectional view taken along line AA.
As shown in these drawings, the flat fiber sheets 12A are alternately arranged and laminated between the first spacers 14A-1 and the second spacers 14A-2 in which the flat blocking portions 16 are formed. Try to form a body.
Therefore, unlike the substantially corrugated cardboard shape formed by joining the conventional flat sheet and corrugated sheet shown in FIG. 26, there is no joined part, and therefore, the loss of the exhaust gas purification area at the joined part is eliminated. 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 fiber sheet 12 has a width of, for example, about 50 to 250 cm and is cut into a predetermined width and used as a sheet body. The fiber sheet may be a nonwoven fabric or a woven fabric.

Further, the filling rate of the fiber sheet is preferably less than 9%.
This is because when the filling rate is 9% or more, the amount of mist water impregnated in the gas increases, the ratio of the water-immersed portion increases, and the gas purification performance cannot be exhibited.

Further, the bulk density of the fiber sheet is preferably 100 kg / m ³ or less.

The basis weight of the fibrous filter is, for example, 80 to 200 g / m ² , preferably 900 to 130 g / m ² .

  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.

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

Further, by making the fiber sheet 12A 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 the apparatus is used as dilute sulfuric acid 18 by the 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.

  The structure sheet which is the first spacer 14A-1 and the second spacer 14A-2 constituting the laminated sheet may be, for example, either a sheet, a mat shape, or a mesh structure, which affects the flow of exhaust gas. It can be used without giving water and having good water discharging properties. Examples of such a good water discharging property include a case where a polyvinylidene chloride synthetic fiber is curled into, for example, a spring shape and arranged in a bulk shape to form a three-dimensional network structure. it can.

  Further, the closing portion 16 that closes the end portion of the spacer is made of resin, but a closing member may be provided separately. Further, a closing portion may be provided in the frame 13 so that the fiber sheet 12A is provided between the second spacers.

  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. .

According to this embodiment, the water immersion in the fiber layer of the fiber sheet 12A is reduced, the effective area of the filter is increased, and the SO ₃ removal performance is improved.
Further, the pressure loss does not increase as in the conventional honeycomb shape.
In addition, water discharge performance is improved.
In addition, the removal rate of fine particles (dust, SO ₃ mist) in the exhaust gas is stably improved, the exhaust gas desulfurization rate is improved, and the purple smoke is reduced and eliminated from the smoke exhausted from the smoke outlet.
Furthermore, the filter manufacturing process can be simplified, and the manufacturing cost and the product cost can be reduced.

Next, other various gas purification members will be described.
An outline of the configuration of the second gas purification member 10-2 according to the present embodiment is shown in FIGS. FIG. 4A is a configuration diagram of one unit constituting the second gas purification member, FIG. 4B is a plan view of the gas purification member, and FIG.
As shown in FIGS. 4-1 to 4-3, in the gas purification member 10-2, the first spacer 14B-1 and the second 14B-2 have a shape in which triangular prisms having a triangular cross section are continuous. And the fiber sheet 12B is made into the triangular zigzag shape along the shape of a spacer.

A gas blocking portion 16 is formed on the end face of the first spacer 14B-1. Then, the first spacer 14B-1, the fiber sheet 12B, the second spacer 14B-2, and the flat fiber sheet 12A are alternately overlapped to constitute a laminated body so as to be installed in a frame (not shown). I have to.
Thereby, the surface area of a fiber sheet increases rather than a 1st gas purification member, and a filter effect increases.

Next, another gas purification member will be described.
The outline of the configuration of the third gas purification member 10-3 according to the present embodiment is shown in FIGS. FIG. 5A is a block diagram of one unit constituting the third gas purification member, FIG. 5B is a plan view of the gas purification member, and FIG.
As shown in FIGS. 5-1 to 5-3, the gas purification member 10-3 has the first spacer 14C-1 and the second spacer 14-2 wave-shaped in cross section, and the fiber sheet 12C is continuous. It is wavy along the wave shape.

A gas blocking portion 16 is formed on the end face of the first spacer 14C-1. Then, the first spacer 14C-1, the fiber sheet 12C, the second spacer 14C-2, and the flat fiber sheet 12A are alternately overlapped to form a laminated body so as to be installed in a frame (not shown). I have to.
Thereby, the surface area of a fiber sheet increases rather than a 1st gas purification member, and a filter effect increases.

Next, another gas purification member will be described.
An outline of the configuration of the fourth gas purification member 10-4 according to the present embodiment is shown in FIGS. FIG. 6A is a configuration diagram of one unit constituting the fourth gas purification member, FIG. 6B is a plan view of the gas purification member, and FIG.
As shown in FIGS. 6-1 to 6-3, in the gas purification member 10-4, the first spacer 14D-1 and the second spacer 14D-2 are columnar, and the fiber sheet 12D is a continuous wavy shape. And a zigzag shape in which prismatic spacers are alternately sandwiched. A gas blocking portion 16 is formed on the end face of the first spacer 14D-1. Then, the first spacer 14D-1, the fiber sheet 12D, the second spacer 14D-2, and the flat fiber sheet 12A are alternately overlapped to constitute a laminated body, and are installed in a frame (not shown). I have to.
Thereby, the surface area of a fiber sheet increases rather than a 1st gas purification member, and a filter effect increases.

Next, an outline of a configuration of the fifth gas purification member 10-5 according to the present embodiment is shown in FIGS. 7-1 to 7-3. FIG. 7-1 is a block diagram of one unit constituting the fifth gas purification member, FIG. 7-2 is a bottom view of the gas purification member, and FIG. 7-3 is a cross-sectional view taken along line AA.
Unlike the first gas purification member 10-1, the fifth gas purification member 10-5 is provided with a blocking portion 16 on the gas introduction side.

Next, FIGS. 8-1 to 8-3 schematically show the configuration of the sixth gas purification member 10-6 according to the present embodiment. FIG. 8A is a configuration diagram of one unit constituting the sixth gas purification member, FIG. 8B is a bottom view of the gas purification member, and FIG.
Unlike the second gas purification member 10-2, the sixth gas purification member 10-6 is provided with a blocking portion 16 on the gas introduction side.

Next, an outline of a configuration of the seventh gas purification member 10-7 according to the present embodiment is shown in FIGS. 9-1 to 9-3. FIG. 9-1 is a block diagram of one unit constituting the seventh gas purification member, FIG. 9-2 is a bottom view of the gas purification member, and FIG. 9-3 is a sectional view taken along the line AA.
Unlike the third gas purification member 10-3, the seventh gas purification member 10-7 is provided with a blocking portion 16 on the gas introduction side.

Next, an outline of a configuration of the eighth gas purification member 10-8 according to the present embodiment is shown in FIGS. 10-1 to 10-3. FIG. 10-1 is a block diagram of one unit constituting the eighth gas purification member, FIG. 10-2 is a bottom view of the gas purification member, and FIG. 10-3 is a cross-sectional view taken along line AA.
Unlike the fourth gas purification member 10-4, the eighth gas purification member 10-8 is provided with a blocking portion 16 on the gas introduction side.

Next, FIGS. 11-1 to 11-3 schematically show the configuration of the ninth gas purification member 10-9 according to the present embodiment. FIG. 11A is a block diagram of one unit constituting the ninth gas purification member, FIG. 11B is a plan view of the gas purification member, and FIG.
Unlike the first gas purification member 10-1, the ninth gas purification member 10-9 is provided with a blocking portion 16 on both the gas introduction side and the gas discharge side.

Next, FIGS. 12-1 to 12-3 schematically show the configuration of the tenth gas purification member 10-10 according to the present embodiment. FIG. 12A is a configuration diagram of one unit constituting the tenth gas purification member, FIG. 12B is a plan view of the gas purification member, and FIG.
Unlike the second gas purification member 10-2, the tenth gas purification member 10-10 is provided with blocking portions 16 on both the gas introduction side and the gas discharge side.

Next, an outline of a configuration of an eleventh gas purification member 10-11 according to the present embodiment is shown in FIGS. 13-1 to 13-3. FIG. 13-1 is a block diagram of one unit constituting the eleventh gas purification member, FIG. 13-2 is a plan view of the gas purification member, and FIG. 13-3 is a cross-sectional view taken along line AA.
Unlike the third gas purification member 10-3, the eleventh gas purification member 10-11 is provided with a blocking portion 16 on both the gas introduction side and the gas discharge side.

Next, an outline of a configuration of a twelfth gas purification member 10-12 according to the present embodiment is shown in FIGS. 14-1 to 14-3. FIG. 14-1 is a block diagram of one unit constituting the twelfth gas purification member, FIG. 14-2 is a plan view of the gas purification member, and FIG. 14-3 is a sectional view taken along line AA.
Unlike the fourth gas purification member 10-4, the twelfth gas purification member 10-12 is provided with the blocking portions 16 on both the gas introduction side and the gas discharge side.

Here, with reference to FIGS. 15-1, 15-2, 16-1, 16-2, 17-1, and 17-2, both-end open passages constituted by the second spacer 14A-2 are used. And the pressure distribution of the filter with the end face closing passage constituted by the third spacer 14A-3 whose end is closed by the closing part 16 will be described.
First, FIG. 15-1 shows a case where both ends open passages 24, 24 are adjacent to each other, and FIG. 15-2 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. 16A is a cross-sectional view of the second spacer 14-2 formed by the second spacer 14-2 of the fifth gas purification member 10-5 and the second spacer 14- having the closed portion 16 at the lower end. 3 shows a case where the gas introduction side closed passages 25A formed from 3 are alternately adjacent via the fiber sheet 12A, and FIG. 16-2 shows the height of each passage at that moment when the exhaust gas 11 is introduced. It is a pressure distribution figure of a direction.
FIGS. 17A and 17B 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. 17-2, 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 25A, and when the exhaust gas 11 is continuously introduced, The exhaust gas 11 passing through the both-end open passage 24 enters the gas introduction side closing passage 25A to be eliminated.
Thereby, when the fine particles 12 contained in the exhaust gas 11 pass through the fiber sheet 12A, they are collected by the fiber layer.

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 via the fiber sheet 12A 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 through the closed passage 25A through the fiber sheet 12A.
5) When the exhaust gas 11 passes through the fiber sheet 12A, SO ₃ mist is removed by a filtering action in the fiber layer constituting the fiber sheet.
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.

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.

Next, a mechanism for collecting fine particles in the exhaust gas 11 in the fiber layer constituting the fiber sheet 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 constituting the fiber sheet 12 </ b> A by Brownian collection. The fine particles of about 0.3 μm or more are collected in the fiber layer by inertial collision, blocking collision, gravity collection, and the like.
FIG. 18 is a schematic view of brown diffusion collection of submicron fine particles in the fiber layer. As shown in FIG. 18, 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 61a constituting the fiber layer 61, and the limit particle locus 62 is determined. 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. 19-1, 19-2, 20-1, and 20-2, the pressure distribution of the filter when the gas discharge side is the passage 25B closed by the closing portion 16 will be described.
FIG. 19A is a plan view of the first spacer 14A-1 having a both-end open passage 24 formed by the second spacer 14A-2 related to the first gas purification member 10-1 and a closed portion 16 at the lower end. FIG. 19-2 shows a case in which the gas discharge side blocking passages 25B formed are alternately adjacent to each other via the fiber sheet 12A. FIG. It is a pressure distribution diagram. In the figure, reference numeral 12A denotes a fiber sheet.
20A and 20B are pressure distribution diagrams in the height direction in the respective passages when the exhaust gas 11 is continuously introduced.

As shown in FIG. 19-2, when the exhaust gas 11 is introduced, there is a difference in pressure distribution between the both-end open passage 24 and the gas discharge side blocking passage 25B, and when 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 through the fiber sheet 12A.
Thereby, when the fine particles contained in the exhaust gas 11 pass through the fiber sheet 12A, they are collected by the fiber layer.

  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.

Next, a case where SO ₃ mist in the exhaust gas is actually collected will be described with reference to FIG.
FIG. 21 explains the gas purification action using the ninth gas purification member using the ninth purification member 10-9.
FIG. 21 shows a gas introduction side closing passage 25A formed from the third spacer 14A-3 having the closing portion 16 at the lower end, and a gas formed from the first spacer 14A-1 having the closing portion 16 at the upper end. The case where the introduction side closed passages 25B are alternately adjacent to each other is shown.
As shown in FIG. 21, the exhaust gas 11 introduced into the gas discharge side blocking passage 25B passes through the first fiber sheet 12A adjacent to the gas discharge side blocking passage 25B, and the SO ₃ mist is collected. Increase efficiency.

  Further, as shown in FIG. 22, in the ninth gas purification member 10-9, by providing the both end open passages 24 made of the second spacers 14A-2 at predetermined intervals, the permeability of the exhaust gas 11 is improved. It is possible to reduce pressure loss and prevent clogging due to accumulation of soot when operating for a long time.

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. 23, the flue gas desulfurization system according to the present embodiment is dedusted by a boiler 100 that generates steam for driving a steam turbine, a dust collector 101 that removes soot in the exhaust gas 11 from the boiler 100, and the like. A push-in fan 102 that supplies the exhaust gas to the gas purification device 30; a humidification cooling device 103 that cools and exhausts the exhaust gas 11 before being supplied to the gas purification device 30; and the gas purification member 10-1, 10-1 is disposed in two stages, and the exhaust gas 11 is supplied from the inlet 112a in the lower side wall of the tower, 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 ). to a gas cleaning device 30 for collecting the SO ₃ mist causes the desulfurization reaction, and a chimney 104 for discharging the purified gas 32 desulfurized from the discharge port 112b of the top to the outside, the gas purifier 20 Gypsum reaction tank 112 for precipitating gypsum by supplying lime slurry 111 with storing dilute sulfuric acid (H ₂ SO ₄₎ 121 via a Luo pump 110, a 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. 24, a mist eliminator 105 is interposed on the downstream side of the humidifying / 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. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a cross-sectional view of a gas purification member according to Example 1. FIG. It is the sectional view on the AA line of FIG. 2-2 of the gas purification member which concerns on Example 1. FIG. 1 is a schematic view of a gas purification device according to Embodiment 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is the sectional view on the AA line of FIG. 4-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is the sectional view on the AA line of FIG. 5-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is the sectional view on the AA line of FIG. 6-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. It is a bottom view of the gas purification member concerning Example 1. It is the sectional view on the AA line of FIG. 7-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. It is a bottom view of the gas purification member concerning Example 1. It is the sectional view on the AA line of FIG. 8-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. It is a bottom view of the gas purification member concerning Example 1. It is the sectional view on the AA line of FIG. 9-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. It is a bottom view of the gas purification member concerning Example 1. It is the sectional view on the AA line of FIG. 10-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is an AA line sectional view of Drawing 11-2 of a gas purification member concerning Example 1. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is an AA line sectional view of Drawing 12-2 of a gas purification member concerning Example 1. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is the sectional view on the AA line of FIG. 13-2 of the gas purification member which concerns on Example 1. FIG. 1 is a configuration diagram of a gas purification member according to Embodiment 1. FIG. 1 is a plan view of a gas purification member according to Embodiment 1. FIG. It is an AA line sectional view of Drawing 14-2 of a gas purification member concerning Example 1. 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. Is a schematic view of collecting SO ₃ mist in exhaust gas using a gas purifying device in the ninth. It is a schematic view of collecting SO ₃ mist in other exhaust gas using the ninth gas purifying device. 2 is a schematic view of a desulfurization system of Example 2. FIG. It is the schematic of the other flue gas desulfurization system of Example 2. FIG. It is the schematic of the conventional gas purification apparatus. It is the schematic of the conventional filter. It is a figure which shows the water immersion state of a filter.

Explanation of symbols

10-1 to 10-12 First to twelfth gas purification members 11 Exhaust gas 12A to 12D Fiber sheet 13 Frame body 14A-1 to 14D-1 First spacer 14A-2 to 14D-2 Second spacer 14A- 3-14D-3 Third spacer

Claims (10)

A gas purification member that purifies harmful substances in exhaust gas,
While alternately laminating fiber sheets and structure sheets,
A gas purification member, wherein a gas blocking portion is formed on an end surface of the structure sheet. In claim 1,
The structure sheet is composed of a first spacer in which a gas closing portion is formed on an end surface on the gas discharge side, and a second spacer through which gas can pass.
A gas purification member, wherein a plurality of the first spacers and the second spacers are alternately arranged, and a fiber sheet is sandwiched therebetween. In claim 1,
The structure sheet is composed of a third spacer in which a gas blocking portion is formed on an end face on the gas introduction side, and a second spacer through which gas can pass.
A gas purification member, wherein a plurality of the third spacers and the second spacers are alternately arranged, and a fiber sheet is sandwiched therebetween. In claim 1,
The structure sheet is composed of a first spacer in which a gas blocking portion is formed on an end surface on the gas discharge side, and a third spacer in which a gas blocking portion is formed on an end surface on the gas introduction side,
A gas purification member, wherein a plurality of the first spacers and the third spacers are alternately arranged, and a fiber sheet is sandwiched between them. In any one of Claims 2 thru | or 4,
A gas purification member characterized in that the spacer is flat and the fiber sheet is flat. In any one of Claims 2 thru | or 4,
A gas purification member characterized in that the spacer has a triangular shape with a triangular cross section and the fiber sheet has a zigzag shape along the continuous triangular shape. In any one of Claims 2 thru | or 4,
A gas purification member characterized in that the spacer is corrugated in cross section and the fiber sheet is corrugated along the continuous corrugation. In any one of Claims 2 thru | or 4,
A gas purification member characterized in that the spacer has a prismatic shape and the fiber sheet has a zigzag shape that alternately sandwiches the prismatic spacers. In any one of Claims 1 to 8,
The gas purification member, wherein the fiber sheet is an activated carbon fiber sheet.   A gas purification device comprising the gas purification member according to any one of claims 1 to 9 in a purification tower in which exhaust gas containing sulfur oxides or product gas flows.

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