JP2015147181A - purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purifier the service life of which can be made longer than before.SOLUTION: A purifier 10 includes: a container 12 having an inlet part 22 and an outlet part 24; and a purifying agent 14 which is packed in the container 12 and disposed between the inlet part 22 and the outlet part 24. The purifying agent 14 has: a central layer 51 disposed on the center side of the container 12; and an outside layer 52 which is disposed on the side of a peripheral wall part 17 of the container 12 with respect to the central layer 51, and has the circulation resistance higher than that of the central layer 51.

Description

  The present invention relates to a purifier.

  DESCRIPTION OF RELATED ART Conventionally, the desulfurizer provided with the container which has an inlet part and an outlet part, and the desulfurization agent with which the inside of the container was filled is known (for example, refer patent document 1, 2). In this desulfurizer, a desulfurization reaction is performed between the gas flowing from the inlet portion to the outlet portion inside the container and the desulfurizing agent.

Japanese Patent No. 4613022 JP 2012-149117 A

  However, in a conventional purifier including the above-described desulfurizer, if a gap is formed between the peripheral wall portion of the container and the purifying agent by using, for example, a granulating agent as the purifying agent, the inside of the container The fluid on the peripheral wall side (outer diameter side) is easier to flow than the center side of the container (the flow resistance becomes lower). For this reason, the flow rate is higher on the peripheral wall portion side of the container than on the center side of the container, and there is a possibility that a drift occurs inside the container.

  Further, when a drift occurs in the interior of the container in this way, the purification reaction by the purification agent is promoted on the peripheral wall portion side of the container rather than the center side of the container. In this case, since the purifier reaches the end of its life at the timing when the purifying agent no longer undergoes the purifying reaction on the peripheral wall side of the container (the timing of breakthrough), the life of the purifier becomes shorter than expected from the original performance. There is a fear.

  Then, an object of this invention is to provide the purifier which can extend a lifetime.

  In order to achieve the above object, a purifier according to claim 1 includes a container having an inlet part and an outlet part, a central layer disposed on a center side of the container, and a peripheral wall part of the container with respect to the central layer. And an outer layer having a flow resistance higher than that of the central layer, and a purifier disposed between the inlet portion and the outlet portion.

  According to this purifier, the purifier has a center layer and an outer layer, and the outer layer has a higher flow resistance than the center layer. Accordingly, since the flow of fluid on the peripheral wall side (outer diameter side) of the container can be suppressed, the flow rate of fluid on the peripheral wall part side of the container can be made close to the flow rate of fluid on the center side of the container. Thereby, since the drift in the inside of a container can be suppressed, the purification reaction by a purification agent can be similarly performed on the peripheral wall side and the center side of the container. As a result, the life of the purifier can be extended as compared with the conventional purifier in which the particle diameter of the purifier is uniform.

  A purifier according to a second aspect is the purifier according to the first aspect, wherein the outer layer has a smaller particle size than the central layer.

  According to this purifier, the flow resistance of the outer layer can be made higher than the flow resistance of the center layer by a simple structure in which the particle size of the outer layer is made smaller than the particle size of the center layer. It is easy and the cost increase can be suppressed.

  The purifier according to claim 3 is the purifier according to claim 1 or 2, wherein the flow of the center layer and the outer layer is uniform so that the flow velocity distribution of the fluid passing through the purifier is uniform. The resistance is set.

  According to this purifier, the flow resistance (the particle size and ratio of the purifier, etc.) of the central layer and the outer layer is set so that the flow velocity distribution of the fluid passing through the purifier is uniform. Accordingly, the flow velocity distribution of the fluid passing through the purifying agent can be made close to uniform, so that the entire purifying agent can be used up. Thereby, the lifetime of a purifier can be extended more effectively.

  As described in detail above, according to the present invention, the life of the purifier can be extended.

It is a perspective view of the purifier concerning one embodiment of the present invention. It is a longitudinal cross-sectional view of the purifier shown by FIG. It is a figure explaining the manufacturing method of the purifier shown by FIG. It is a perspective view of the purifier which concerns on a prior art example. It is a longitudinal cross-sectional view of the purifier shown by FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the purifier 10 according to one embodiment of the present invention includes a container 12 and a purifying agent 14.

  As an example, the container 12 is formed of a cylindrical body having a circular cross section having a cylindrical peripheral wall portion 17 and a pair of end portions 18 and 20 that close both ends in the axial direction of the peripheral wall portion 17. An inlet portion 22 is formed at the end portion 18 on the one axial side of the container 12, and an outlet portion 24 is formed at the end portion 20 on the other axial side of the container 12. The inlet portion 22 and the outlet portion 24 are formed in a tubular shape extending along the axial direction of the container 12, and are provided on the central axis of the container 12. In FIG. 1, a part of the container 12 is cut away so that the purifier 14 inside the container 12 can be seen. The same applies to FIG. 4 described later.

  The cleaning agent 14 is, for example, an aggregate such as a granular material or a columnar block, and is filled in the container 12. The purifier 14 is disposed between the inlet portion 22 and the outlet portion 24 inside the container 12. As shown in FIG. 2, a pair of holding members 26 and 28 that are separated in the axial direction of the container 12 are provided inside the container 12. Each holding member 26, 28 has an annular plate member 30 and a mesh 32 provided inside the plate member 30, and the purifying agent 14 is contained in the container 12 by the pair of holding members 26, 28. It is held from both sides in the axial direction. The pair of holding members 26 and 28 are respectively separated from the end portions 18 and 20 on both sides in the axial direction of the container 12, and thereby, between the inlet portion 22 and the purifying agent 14 and between the purifying agent 14 and the outlet portion. Clearances 34 and 36 are respectively provided between the two.

  In the purifier 10, a fluid flows into the container 12 through the inlet portion 22, and the fluid that has flowed performs a purification reaction with the purifier 14 when flowing through the container 12, and then It is discharged out of the container 12 through the outlet 24. The purifier 10 provided with the purifier 14 is preferably used as a desulfurizer (room temperature adsorption desulfurizer) in a pretreatment stage in a fuel cell system using city gas, for example, and the purifier 10 is a desulfurizer. When used as, the purifier 14 is a desulfurizing agent. As this desulfurizing agent, for example, silver zeolite is used.

  More specifically, the above-described purifying agent 14 has a center layer 51 and an outer layer 52 that are composed of purifying agents 54A and 54B having different sizes. The center layer 51 is disposed on the center side of the container 12. The center layer 51 is composed of a large purification agent 54A, so that the gap between the grains is large, thereby reducing the flow resistance. On the other hand, the outer layer 52 is disposed on the peripheral wall 17 side (outer diameter side) of the container 12 with respect to the central layer 51 (provided in an annular shape along the peripheral wall 17). The outer layer 52 is composed of the small purification agent 54B smaller than the large purification agent 54A, so that the gap between the grains is reduced, and thereby the flow resistance is higher than that of the central layer 51. .

  In the present embodiment, the flow resistance (the particle diameters and ratios of the purifying agents 54A and 54B) of the central layer 51 and the outer layer 52 are set so that the flow velocity distribution of the fluid passing through the purifying agent 14 is uniform. ing. The setting of the flow resistance of the center layer 51 and the outer layer 52 is performed, for example, by repeating trial manufacture or simulation. Moreover, it can be grasped | ascertained by investigating the reaction acceleration | stimulation state by the simulation, etc., for example that the flow velocity distribution of the fluid which passes the purification agent 14 is uniform.

  In the purifier 10 provided with the purifying agent 14, for example, the peripheral wall portion 17 and the other end portion 20 constitute a bottomed cylindrical container main body portion 13 that is a main body portion of the container 12. Further, the end 18 on one side in the axial direction of the container 12 is configured as a lid member separate from the container main body 13. And this purifier 10 is assembled in the following manner.

  That is, as shown in FIG. 3, for example, the holding member 28 is assembled inside the bottomed cylindrical container main body 13, and the cylindrical jig 50 is inserted inside the container main body 13. . Then, the large purification agent 54A is poured inside the jig 50, and the small purification agent 54B is poured outside the jig 50 (between the jig 50 and the peripheral wall portion 17). Thereafter, the jig 50 is pulled out from the container body 13 to form the center layer 51 and the outer layer 52 inside the container body 13, and the holding member 26 is assembled inside the container body 13, and the container The purifier 10 is completed by assembling the lid-like end 18 on one side of the main body 13 in the axial direction.

  Next, the operation and effect of one embodiment of the present invention will be described.

  In order to clarify the operation and effect according to the embodiment of the present invention, a conventional example will be described first. 4 and 5 show a purifier 70 according to a conventional example. In the purifier 70 according to the conventional example, the same components as those of the purifier 10 according to the embodiment of the present invention described above are denoted by the same reference numerals, and the description thereof is omitted. In the purifier 70 according to this conventional example, the particle size of the purifier 14 is uniform (same as the large purifier 54A described above) compared to the purifier 10 according to the embodiment of the present invention.

  However, in the purifier 70 according to this conventional example, since a gap is formed between the purifying agent 14 constituted by a granular agent or the like and the peripheral wall portion 17 of the container 12, the peripheral wall portion 17 is inside the container 12. On the side (the outer diameter side of the container 12), the fluid flows more easily than the center side of the container 12 (the flow resistance decreases). For this reason, as shown in FIG. 5, the flow velocity Va of the fluid on the peripheral wall portion 17 side of the container 12 becomes higher than the flow velocity Vb of the fluid on the center side of the container 12, and there is a possibility that drift occurs inside the container 12. . In particular, the drift in the inside of the container 12 becomes prominent on the downstream side of the central portion in the axial direction of the container 12.

  Further, when a drift occurs inside the container 12 in this way, the purification reaction by the purification agent 14 is promoted on the peripheral wall 17 side of the container 12 rather than on the center side of the container 12. In FIG. 5, a region in the purification agent 14 where the purification reaction cannot be performed is indicated by a dark dot, and a region capable of the purification reaction in the purification agent 14 is indicated by a thin dot. In such a purifier 70, the purifier 70 reaches the end of its life at the timing when the purifying agent 14 no longer performs the purifying reaction on the peripheral wall 17 side of the container 12 (breakthrough timing). The life of the purifier 70 may be shorter than expected. In addition, if the fluid contains heavy hydrocarbons or high-concentration moisture, the drift is accelerated, and the life of the purifier 70 may be further shortened.

  On the other hand, according to the purifier 10 according to the present embodiment shown in FIG. 2, the purifier 14 has the center layer 51 and the outer layer 52, and the outer layer 52 is more circulated than the center layer 51. Resistance is high. Accordingly, since the flow of fluid on the peripheral wall 17 side (outer diameter side) of the container 12 can be suppressed, the fluid flow velocity Va on the peripheral wall portion 17 side of the container 12 is changed to the fluid flow velocity Vb on the center side of the container 12. You can get closer. Thereby, since the drift in the inside of the container 12 can be suppressed, the purification reaction by the purification agent 14 can be similarly performed on the peripheral wall portion 17 side and the center side of the container 12. As a result, the life of the purifier 10 can be extended as compared with the conventional purifier 70 in which the particle size of the purifier is uniform.

  In particular, in the purifier 10, the flow resistance (particle size, ratio, etc. of the purifier) of the center layer 51 and the outer layer 52 is set so that the flow velocity distribution of the fluid passing through the purifier 14 is uniform. . Accordingly, the flow velocity distribution of the fluid passing through the purifying agent 14 can be made close to uniform, so that the entire purifying agent 14 can be used up. Thereby, the lifetime of the purifier 10 can be extended more effectively.

  In other words, according to the purifier 10, when the lifetime is the same as that of the conventional purifier 70, the amount of the purifier 14 can be reduced. Cost can be reduced.

  Moreover, in the purifier 10, the flow resistance of the outer layer 52 can be made higher than the flow resistance of the center layer 51 by a simple structure in which the particle size of the outer layer 52 is made smaller than the particle size of the center layer 51. Therefore, manufacturing is easy and cost increase can be suppressed.

  Next, a modification of one embodiment of the present invention will be described.

  In the said embodiment, although the purifier 10 was suitably used as a desulfurizer (room temperature adsorption desulfurizer) in a fuel cell system, for example, things other than a desulfurizer (for example, a heat desulfurizer or a hydrogenation) In addition to a desulfurizer, a general purifier such as a catalyst may be used. Moreover, the purifier 10 may be used at normal temperature, or may be used at high temperature. Further, the cleaning agent 14 may be a material other than the desulfurizing agent. Moreover, the purifier 10 may be configured to purify liquid as well as gas. Further, when the purifier 10 is configured to purify a liquid, for example, an ion exchange resin may be used as the purifier 14.

  In the above embodiment, the purifier 14 has a two-layer structure including the center layer 51 and the outer layer 52. However, for example, when at least one of the center layer 51 and the outer layer 52 is further divided into a plurality of layers in the radial direction of the container 12, the purifier 14 has a structure of three or more layers having different particle sizes. Also good.

  In the above embodiment, the flow resistance of the outer layer 52 is higher than the flow resistance of the central layer 51 by making the particle diameters different between the central layer 51 and the outer layer 52. However, the distribution resistance of the outer layer 52 is greater than the distribution of the central layer 51 due to a configuration other than the particle diameters of the central layer 51 and the outer layer 52 being different (for example, the ratio of particles having different particle diameters is different). You may make it become higher than resistance.

  Moreover, in the said embodiment, although the container 12 was formed in the cross-sectional circle shape, you may form in shapes (for example, square, a polygon, an ellipse, etc.) other than circular cross section. Moreover, although the container 12 was formed straight in the direction which connects the inlet part 22 and the outlet part 24, it may be formed in shapes other than a straight shape (for example, curved or bent shape).

  Further, in the above-described embodiment, the gaps 34 and 36 are provided between the end portions 18 and 20 on both sides in the axial direction of the container 12 and the purifier 14, but the gaps 34 and 36 are provided. It may not be necessary (the purifier 14 may be in contact with the end portions 18 and 20 on both axial sides of the container 12).

  Moreover, in the said embodiment, although the inlet part 22 and the outlet part 24 were provided on the central axis of the container 12, the position where the inlet part 22 and the outlet part 24 deviated from the central axis of the container 12 (eccentric position) ) May be provided. In addition, one of the inlet portion 22 and the outlet portion 24 is provided on the central axis of the container 12, and the other of the inlet portion 22 and the outlet portion 24 is provided at a position deviated from the central axis of the container 12 (an eccentric position). May be. Further, the inlet portion 22 and the outlet portion 24 may be provided on one side and the other side of the peripheral wall portion 17 in the axial direction, respectively. In this case, the inlet portion 22 and the outlet portion 24 may extend toward the radially outer side of the peripheral wall portion 17.

  In addition, the modification which can be combined among the said several modification can be implemented combining suitably.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 ... Purifier, 12 ... Container, 13 ... Container main-body part, 14 ... Purifier, 17 ... Perimeter wall part, 18 ... End part of the axial direction in a container, 20 ... End part of the other axial direction in a container, 22 ... Inlet part, 24 ... Outlet part, 26, 28 ... Holding member, 30 ... Plate material, 32 ... Mesh, 34, 36 ... Gap, 50 ... Jig, 51 ... Center layer, 52 ... Outer layer, 54A, 54B ... Purification Agent

Claims (3)

A container having an inlet portion and an outlet portion;
A center layer disposed on the center side of the container, and an outer layer disposed on the peripheral wall portion side of the container with respect to the center layer and having a higher flow resistance than the center layer, and the inlet portion and the outlet portion. A purifier disposed between the
Purifier with. The outer layer has a smaller particle size than the central layer,
The purifier according to claim 1. The flow resistance of the central layer and the outer layer is set so that the flow velocity distribution of the fluid passing through the purifier is uniform.
The purifier according to claim 1 or 2.

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