JP6470571B2 - Honeycomb structure and arrangement structure of honeycomb structure - Google Patents

Description

  The present invention relates to a honeycomb structure and an arrangement structure of the honeycomb structure.

  Honeycomb structures are frequently used as filters and catalyst carriers. Since the honeycomb structure has a very large specific surface area, it has an advantage that the area that functions as a filter and the area that can support the catalyst are large.

  In addition, the honeycomb structure is heated by self-heating due to energization or external heating, a heating device that heats the gas or liquid to be circulated, two or more gases or liquids that circulate in different cells as a heat medium, and the cell wall is It is also used as a heat storage element that receives heat from and stores heat exchange elements that exchange heat through the gas or liquid to be circulated. Further, it has also been proposed to use a honeycomb structure as a heat transfer promoting body that is disposed in a radiant tube and transfers heat of a heated fluid that circulates in the tube to the tube (see Patent Document 1).

  Any of the honeycomb structures used for various applications as described above can exhibit their actions more efficiently as the contact area with the gas or liquid to be circulated is larger.

  However, the honeycomb structure used for the above-mentioned applications is disposed in a pipe line that forms a flow path through which gas or liquid flows, or is connected to a pipe line through which gas or liquid flows. Or it arrange | positions in the vicinity of the downstream end of the pipe line through which gas distribute | circulates. In general, when a fluid flows in a pipeline, a frictional resistance is generated near the inner wall surface of the pipeline and it is difficult for the fluid to flow. Therefore, even in the honeycomb structure disposed in the pipe line, the fluid easily flows in the central portion and hardly flows in the outer peripheral edge portion. Also, in the honeycomb structure connected to the pipe line and the honeycomb structure arranged in the vicinity of the downstream end of the pipe line, the fluid mainly flowing through the central portion of the pipe line goes straight as it is, and the honeycomb structure body It is easy to pass through only the central part.

  Therefore, the conventional honeycomb structure can not fully utilize the advantage of the honeycomb structure that the fluid easily flows through the central portion and the specific surface area is very large, and the fluid after passing through the honeycomb structure, There was a tendency to distribute only the central part of the pipeline.

JP 2013-19644 A

  Accordingly, in the present invention, in view of the above situation, the fluid does not flow only through the central portion of the honeycomb structure, and the fluid after passing through the honeycomb structure does not flow through only the central portion of the pipe. An object of the present invention is to provide a honeycomb structure and an arrangement structure of the honeycomb structure.

  In order to solve the above-described problems, the honeycomb structure according to the present invention has a structure in which “a plurality of segments having a honeycomb structure including a plurality of cells partitioned by partition walls extending in a single direction are joined. Each of the segments is a honeycomb structure, and each segment has a cell axis that is a direction in which the partition wall extends with respect to an orthogonal axis that is orthogonal to the first end surface on the upstream side. The first end surface is the same surface, and the cell axes of two or more segments are joined in different directions.

  The material of the “segment” is not particularly limited, and may be a ceramic such as silicon carbide, alumina, cordierite, or a metal such as aluminum, stainless steel, or copper.

  The “upstream side” is a side through which fluid flows into the honeycomb structure, and in the honeycomb structure of the present invention, the “first end surface” is a surface through which fluid flows. Hereinafter, the side from which the fluid flows out from the honeycomb structure with respect to the upstream side is referred to as “downstream side”.

  The “cell axis” is a direction in which the partition wall extends, but since the flow direction of the fluid is regulated by the partition wall, it is the flow direction of the fluid flowing through the cell. This also applies to the wall flow type in which a fluid passes through a porous partition wall and flows into an adjacent cell in the same segment.

  “The two or more segments are joined so that the cell axes are in different directions” means that in the honeycomb structure, if two or more segments having cell axes in different directions are joined, the cell axes are Segments that are in the same direction may be included. As an aspect thereof, each of the plurality of segments has a cell axis in a different direction, two or more groups composed of a plurality of segments joined with the cell axes aligned are joined, and each group includes A mode having cell axes in different directions and a mode in which two or more segments having the same cell axis as two or more segments having cell axes having different directions can be exemplified.

  In the honeycomb structure of the present configuration, the fluid flowing in from the first end surface does not go straight in the direction orthogonal to the first end surface, but flows in two or more different directions. Therefore, even if the fluid flows from only the central portion of the first end surface, the fluid can be directed in different directions inside the honeycomb structure, and the fluid can be circulated throughout the honeycomb structure. Therefore, according to the honeycomb structure of the present configuration, the honeycomb structure includes an action of receiving heat from the fluid, an action of giving heat to the fluid, an action of exchanging heat between the fluids, an action of filtering the fluid, and an action of bringing the fluid into contact with the catalyst. The action required for the structure can be efficiently exhibited by taking advantage of the very large surface area. Moreover, since the fluid after passing through the honeycomb structure is directed in different directions in the pipeline, the fluid flow can be disturbed. As a result, the fluid can be circulated also in the vicinity of the inner wall surface of the pipe line where it is difficult for the fluid to flow due to frictional resistance. For example, when the honeycomb structure is used as a heat transfer promoting body, It can be efficiently transmitted to the wall. Further, the fluid that has passed through the honeycomb structure is directed in various directions, whereby the fluid can be agitated. Thereby, for example, when the honeycomb structure is used as a heating body for heating the fluid, the heated fluid can be stirred and sent to the downstream side as a fluid having a uniform temperature.

The honeycomb structure according to the present invention has the above-described configuration, “two or more of the segments are joined such that the extending direction of the cell axis turns in the same direction when viewed from the first end face side”. things der Ru.

  According to the honeycomb structure of this configuration, the flow of the fluid after passing through the honeycomb structure can be a swirl flow.

  In addition to the above configuration, the honeycomb structure according to the present invention may be “each of the segments has a square cross section parallel to the first end surface”.

  According to the honeycomb structure of the present configuration, in the segment in which the cell axis is inclined, a plurality of segments are joined so that the first end surface is the same surface by making the cross section parallel to the first end surface square. The end face of the honeycomb structure formed in this way can be made without gaps. Thereby, it can be set as the honeycomb structure without a dead space in the end surface into which a fluid flows.

  Next, an arrangement structure of the honeycomb structure according to the present invention is as follows. “The honeycomb structure described above is arranged in a flow path through which a fluid flows so that the first end surface is orthogonal to the fluid flow direction. Is.

  As an aspect in which the honeycomb structure is arranged in the flow path through which the fluid flows, an aspect in which the honeycomb structure is arranged in a pipe line forming the flow path, an aspect in which the honeycomb structure is connected to the pipe line, and a pipe A mode in which the honeycomb structure is disposed on the downstream side of the path (fluid outlet) and in the vicinity thereof can be exemplified.

  According to the arrangement structure of the honeycomb structure of the present configuration, the fluid smoothly flows into the honeycomb structure from the first end surface orthogonal to the fluid flow direction, and the inflowed fluid flows in two or more different directions. Can do.

  In addition to the above configuration, the arrangement structure of the honeycomb structure according to the present invention may be “a plurality of the honeycomb structures are arranged apart from each other in the flow path”.

  According to the arrangement structure of the honeycomb structure of the present configuration, the flow of the fluid after passing through the first honeycomb structure is a complex flow in which two or more flow directions are combined. As the flow passes through the second honeycomb structure, different flow directions are combined to form a more complicated flow. Thereby, the degree to which the fluid becomes turbulent and the degree to which the fluid is stirred becomes higher.

  As described above, as an effect of the present invention, a honeycomb in which the fluid does not flow only through the central portion of the honeycomb structure, the fluid after passing through the honeycomb structure is turbulent, and the fluid can be stirred The provision of the structure and the arrangement structure of the honeycomb structure can be provided.

(A) Front view and plan view of an unprocessed segment, and (b) Front view of a segment after processing and a shape of a cut surface, illustrating the segments constituting the honeycomb structure of the first embodiment of the present invention. It is. 1 is a perspective view of a honeycomb structure according to a first embodiment of the present invention. FIG. 3 is a diagram for explaining a direction of a cell axis in the honeycomb structure of FIG. 2. (A) Front view and plan view of an unprocessed segment, and (b) Front view of a segment after processing and a shape of a cut surface, illustrating the segments constituting the honeycomb structure of the second embodiment of the present invention. It is. It is a perspective view of the honeycomb structure of a second embodiment of the present invention. It is a perspective view of the segment group which comprises the honeycomb structure of 3rd embodiment of this invention. It is a perspective view of the honeycomb structure of a third embodiment of the present invention. It is a figure which shows the arrangement structure of the honeycomb structure of this invention. It is a graph which shows the result of a heat-transfer promotion body evaluation test. It is a figure which shows another aspect of the cell shape of the honeycomb structure of this invention.

  Hereinafter, the honeycomb structures 1, 2, 3 of the first embodiment to the third embodiment of the present invention and the arrangement structure of the honeycomb structures (hereinafter, simply referred to as “arrangement structure”) are shown in FIGS. 9 will be used for explanation.

First, as shown in FIGS. 1 to 3, the honeycomb structure 1 of the first embodiment has a honeycomb structure including a plurality of cells 6 that are partitioned by partition walls 5 extending in a single direction. a four honeycomb structures joined segment 11, each segment 11, to the orthogonal axis P _O that is orthogonal to the first end surface 12 on the upstream side, the cell axis P which is the direction of extension of the partition wall 5 _C is inclined, the four segments 11, each of the first end surface 12 and the same plane, and one in which the cell axis P _C of each segment 11 are joined so that the different directions.

Moreover, in the honeycomb structure 1, the four segments 11, the cell extending direction axis P _C is, to pivot in the same direction when viewed from the first end surface 12 side are joined.

  More specifically, the honeycomb structure 1 of the first embodiment is formed by joining four ceramic segments 11 with a heat-resistant adhesive.

Each segment 11 is formed by cutting the raw segment 10 shown in FIG. The unprocessed segment 10 is obtained by drying or firing a molded product obtained by extruding a kneaded material obtained by mixing ceramic powder with water or a binder from a square die, and the partition walls 5 extend perpendicularly to the square end face. It is a rectangular prism with a honeycomb structure. By cutting such an unprocessed segment 10 along two parallel planes indicated by a two-dot chain line in the figure, as shown in FIG. 1B, an orthogonal axis P _O orthogonal to a pair of rhombic end faces. segment 11 is obtained cell axis P _C is inclined with respect to.

The above-mentioned segments 11 are joined so that one of the pair of end faces is a first end face 12 and the first end faces 12 of the four segments 11 are the same face. In addition, each segment 11, as shown in FIG. 3, the direction of the cell axis P _C when viewed from the first end face 12 side is inclined in the same direction, the cells of the segment 11 that each cell axes P _C is adjacent They are joined so as to intersect at an angle of the axis P _C and 90 °. That four segments 11 is joined to pivot at equal angular intervals in the same direction four cells axis P _C is seen from the first end face 12 side. In FIG. 3, four cells axis P _C is seen from the first end surface 12 side, it illustrates a case where it is joined to pivot counterclockwise.

Then, by cutting the outer peripheral surface of the joined body 15 to which the segments 11 are joined as described above, as shown in FIG. 2, the honeycomb structure 1 having a cylindrical outer shape is obtained. Further, by such processing, cell 6 cell axis P _C is tilted to open the outer side surface of the honeycomb structure 1. Hereinafter, the end surface of the honeycomb structure 1 formed by the first end surface 12 of the segment 11 is referred to as an “inflow surface”.

According to the honeycomb structure 1 of the first embodiment, fluid flowing from the inflow surface flows toward the four different cell axis P _C. Thereby, the fluid that has flowed into the honeycomb structure 1 does not flow only through the central portion of the honeycomb structure 1. For this reason, for example, when the honeycomb structure 1 is arranged as a heat transfer promoting body in the tube of the radiant tube heater, the area where the gas heated by the gas burner or the like and the honeycomb structure 1 come into contact with each other is increased and heated. The honeycomb structure 1 is efficiently heated by the gas.

The fluid after passing through the honeycomb structure 1, since toward the extending direction of the cell axis P _C, flows from the honeycomb structure 1 towards the plurality of different directions outward. Thereby, when the honeycomb structure 1 is used as a heat transfer promoting body, the heated gas can be circulated also in the vicinity of the inner wall surface of the tube having high frictional resistance, and the heat of the heated gas is efficiently supplied to the tube. I can tell you. In addition, the gas passing through the honeycomb structure 1 becomes a swirl flow swirling in one direction. As a result, contact between the heated gas flowing in a swirl and the tube increases, and the gas is stirred downstream of the honeycomb structure 1, so that the amount of heat transfer to the tube by convective heat transfer can be increased.

  Further, in the honeycomb structure 1, the cells 6 are opened on the outer surface. For this reason, the area of an outer surface is large compared with the conventional honeycomb structure in which a cell opens to an end surface, and the heat transfer amount by radiant heat transfer increases. In addition, since the cells 6 are open on the outer surface, the gas that has passed through the honeycomb structure 1 is ejected toward the inner wall surface of the tube, so that the heat of the heated gas is more efficiently transmitted to the tube. be able to.

  In the above description, the case where the honeycomb structure 1 is used as a heat transfer promoting body disposed in a radiant tube heater has been described as an example. As for the action of turning the fluid flow after passing through the swirl, the action of stirring the fluid, and the action of ejecting the fluid from the cells opened on the outer surface of the honeycomb structure 1, the heating body, heat exchanger, heat storage body The same applies when the honeycomb structure 1 is used.

  For example, when the honeycomb structure 1 is self-heated by energization and is used as a heating body that circulates and heats the fluid, it is different from the conventional honeycomb structure in which the fluid passes only through the central portion of the heating body. In addition, the heat generated from the entire honeycomb structure 1 can be efficiently applied to the fluid flowing through the honeycomb structure 1 in various directions. In addition, the fluid heated by the honeycomb structure 1 passes through the honeycomb structure 1 to become a swirl flow, and there is a flow of fluid ejected in multiple directions from cells opened on the outer surface of the honeycomb structure 1. Thus, the degree of fluid turbulence after passing through the honeycomb structure 1 is high. Thereby, since the fluid is sufficiently agitated, it can be flowed downstream as a fluid heated to a uniform temperature.

  Next, the honeycomb structure 2 of the second embodiment will be described with reference to FIGS. 4 and 5. The difference between the honeycomb structure 2 of the second embodiment and the honeycomb structure 1 of the first embodiment is that the cross section parallel to the first end surface 12 of the segment 21 constituting the honeycomb structure 2 is square. There is a point.

More specifically, the segment 21 is formed by cutting the raw segment 20 shown in FIG. The unprocessed segment 20 is a quadrangular prism having a honeycomb structure in which the partition walls 5 extend perpendicularly to the end face of the rhombic shape. The raw segment 20, by cutting with two surfaces parallel indicated by the two-dot chain line in the figure, as shown in FIG. 4 (b), with respect to the orthogonal axis P _O that is orthogonal to the pair of end faces of the square segment 21 the cell axis P _C is inclined can be obtained. And the honeycomb structure 2 is comprised from the four segments 21 similarly to the honeycomb structure 1. FIG. Each segment 21 is joined such that one of a pair of end faces each having a square shape is the first end face 12 and the first end faces 12 of the four segments 21 are the same face. In addition, each segment 21, together with the direction of the cell axis P _C when viewed from the inflow side is inclined in the same direction, at an angle of the cell axis P _C and 90 ° segments 21 each cell axes P _C is adjacent They are joined so that they intersect.

  According to the honeycomb structure 2 of the second embodiment, since the first end surfaces 12 of the four segments 21 are square, a gap is formed when joining so that the first end surfaces 12 are the same surface. In other words, there is no dead space where the fluid cannot flow at the inflow surface. (See FIG. 5). For this reason, the fluid can be more efficiently circulated through the honeycomb structure 2 without hindering the flow of the fluid circulated toward the inflow surface.

Next, the honeycomb structure 3 according to the third embodiment will be described with reference to FIGS. 1, 6, and 7. Like the honeycomb structure 1 of the first embodiment, the honeycomb structure 3 is composed of the segments 11 shown in FIG. 1B. However, the number of the joined segments 11 and the number of the segments 11 to be joined are as follows. It is different in the direction of the cell axis P _C.

More specifically, as shown in FIG. 6, the honeycomb structure 3 is formed by joining four “segment groups 22” to which nine segments 11 are joined. Nine segments 11 in each segment group 22, each of the first end surface 12 is flush, and, as the direction of the cell axis P _C matches are joined by overlapping adjacent segments 11 with each other aspect ing. Here, a surface formed by the first end surfaces 12 of the nine segments 11 is referred to as a “first end surface of a segment group”. And the four segment groups 22 are joined so that the first end faces of the respective segment groups are the same as the four segments 11 in the honeycomb structure 1. In addition, when viewed from the inflow side of the honeycomb structure 3 is formed of four first end surface of the segment group, the cell axis P _C of each segment group 22, the cell axis P _C of the adjacent segment group 22 They are joined so as to intersect at an angle of 90 °.

  According to the honeycomb structure 3 of the third embodiment, it is possible to easily form a larger honeycomb structure that can obtain the same effect as that of the honeycomb structure 1. In general, when a honeycomb structured ceramic is formed by extrusion, it is difficult to obtain a formed body having a large cross-sectional area. However, as in this embodiment, a segment group 22 composed of a plurality of segments 11 is a unit for joining. Thus, the honeycomb structure 3 having a large cross-sectional area can be easily formed according to the installation space.

  Next, the arrangement structure of the honeycomb structure of the present embodiment will be described. The arrangement structure of the present embodiment is such that the first end surface 12 of the segment is orthogonal to the fluid flow direction in the flow path through which the fluid flows, in other words, the inflow surface of the honeycomb structure is orthogonal to the fluid flow direction. Thus, the honeycomb structure is arranged.

  If it demonstrates in detail, in this embodiment, the flow path through which the fluid distribute | circulates is formed in the pipe line. Any of the above-described honeycomb structures 1, 2, and 3 can be used for the arrangement structure of the present embodiment, but here, the honeycomb structure 1 is used as a heat transfer accelerator of a radiant tube heater. Is illustrated. As shown in a schematic configuration in FIG. 8, the radiant tube heater circulates the gas heated by the heating device 40 such as a gas burner through the tube 30, heats the tube 30 with the heated gas, and reaches a high temperature. At 30, the object is heated indirectly. In the arrangement structure of the present embodiment, the honeycomb structure 1 is arranged at a position separated from the heating device 40 by a predetermined distance in the tube 30. Since the flow direction of the gas heated by the heating device 40 is parallel to the axial direction of the tube 30, in the arrangement structure of the present embodiment, the inflow surface of the honeycomb structure 1 is orthogonal to the axial direction of the tube 30. Will be arranged as follows. Here, the space in which the gas flows in the tube 30 that is a pipe line corresponds to the “flow path” of the present invention, and the gas heated by the heating device 40 such as a gas burner corresponds to the “fluid” of the present invention.

  In order to clarify the effect of the arrangement structure of the present embodiment, a heat transfer promoting body evaluation test (hereinafter simply referred to as an evaluation test) was performed by the following method. In the evaluation test, an ERW steel pipe having a length of 2000 mm, an outer diameter of 190.7 mm, and a thickness of 4.5 mm was used as the tube 30, and a gas burner was used as the heating device 40. Further, as shown in FIG. 1, as the honeycomb structure, as shown in FIG. 2, after joining four segments 11 obtained by cutting an unprocessed segment 10 (cross section 50 mm × 50 mm) formed of silicon carbide, Four types of honeycomb structures (Examples 1 to 4) whose outer shapes were arranged in a cylindrical shape were used. The honeycomb structures of Examples 1 to 4 have the same size, a diameter of 176 mm, a height of 70 mm, and a partition wall thickness of 0.635 mm (25 mil). As shown in Table 1, the cell shape of each honeycomb structure and the cell density of the segments constituting the honeycomb structure are shown in Table 1. Examples 1 and 2 are examples of the same cell shape but different cell densities. Examples 3 and 4 are the same cell density but different cell shapes.

  As shown in FIG. 8, the heating device 40 is disposed outside one end portion of the tube 30, and the honeycomb structure of Examples 1 to 4 is positioned 1280 mm away from the end portion on the side where the heating device 40 is disposed. Were arranged such that the inflow surface was orthogonal to the axis of the tube 30. In addition, a gap is provided between the outer surface of the honeycomb structure and the inner surface of the tube 30.

And the air heated with the gas burner from the heating apparatus 40 was supplied with the flow volume of 70 m < ³ > / h, and the tube 30 was heated. The surface temperature of the tube 30 at the time when the surface temperature in the vicinity of the end surface of the tube 30 reached 780 ° C. was measured with a radiation thermometer at regular intervals from the end on the heating device 40 side toward the other. Next, in Examples 1 to 4 for comparison in place of the honeycomb structure, the conventional honeycomb structure of the cell axis P _C is orthogonal to the inflow surface similar with Comparative Example 1 A test was conducted. The conventional honeycomb structure has the same material as the honeycomb structures of Examples 1 to 4, the same outer shape and the same size, and the same cell shape and cell density as in Example 1. It is formed from raw segments. In addition, the honeycomb structure of Comparative Example 1 was arranged with the cell axial direction aligned with the axial direction of the tube 30. In addition, the test was similarly performed also about the case (comparative example 2) when not installing a heat-transfer promoter in a tube. The results of the evaluation test are shown in FIGS. 9 (a) and 9 (b).

  As shown in FIGS. 9A and 9B, in Comparative Example 2 in which no heat transfer promoting body is arranged, the surface temperature of the tube 30 monotonously decreases from the vicinity of the distance of 200 mm where the maximum temperature is reached to the downstream. As the distance from the heating device 40 increases, it can be seen that the heat of the heated air is not transmitted to the tube. On the other hand, when the heat transfer promoting body is arranged (Examples 1 to 4 and Comparative Example 1), the surface temperature rises at the place where it is arranged (range of distance 1280 to 1350 mm indicated by a dashed line in the figure). It can be seen that the heat of the heated air is transmitted to the tube through the heat transfer promoting body. The temperature increase range is larger in Examples 1 to 4 than in Comparative Example 1 in which the conventional honeycomb structure is arranged. This is because in the honeycomb structures of Examples 1 to 4, the heated air does not circulate only in the central portion, and the contact area between the honeycomb structure and the heated air is increased. Since the gas that has flowed efficiently from the downstream end face of the honeycomb structure becomes a swirling flow because of efficient heating, contact between the gas and the inner wall surface of the tube 30 increases, and the heat of the heated gas is transferred to the tube 30. Since the cell 6 is transmitted efficiently and the cell 6 is open on the outer surface, the outer surface has a large surface area and a large amount of heat transfer by radiant heat transfer, and from the outer surface toward the inner wall surface of the tube 30. This is considered to be because the tube 30 was heated more efficiently by the jetting heated air. It can be seen from a comparison between Example 1 and Example 2 that this effect is greater when the cell density is increased.

  FIG. 9B shows the results of Examples 1, 3, and 4 in which the cell density is the same and the cell shape is different. However, the increase in temperature did not change significantly depending on the difference in the cell shape.

  Further, regarding FIGS. 9A and 9B, when attention is paid to the surface temperature of the tube on the downstream side from the place where the heat transfer promoting body is disposed, the comparative example 1 matches the comparative example 2 where the heat transfer promoting body is not disposed. On the other hand, in Examples 1 to 4, a high temperature was maintained. This is considered to be because the contact area between the tube and the heated air is increased due to the swirling flow of the air flowing through the honeycomb structures of Examples 1 to 4, and the heat transfer amount due to convective heat transfer is increased. It is done. As described above, in the arrangement structure of this embodiment in which the honeycomb structure of this embodiment is used as the heat transfer promoting body of the radiant tube heater, it is confirmed that heat can be transferred from the heated air to the tube very efficiently. It was done.

Note that the arrangement structure of the present embodiment may be an arrangement structure in which a plurality of honeycomb structures are arranged apart from each other in the flow path. With such arrangement, the fluid flowing from the central portion in the inflow surface of the upstream side of the honeycomb structure, the inside of the honeycomb structure along the direction of the cell axis P _C, from the center towards the outside It flows into the portion close to the outer periphery on the inflow surface of the downstream honeycomb structure. In addition, the fluid that has flowed into the downstream honeycomb structure flows in a direction different from the direction in which it flows and flows out of the honeycomb structure. As a result, the flow of the fluid after passing through the honeycomb structure on the downstream side becomes more complicated and a flow with a higher degree of turbulence, and thus the above-described action is more effectively exhibited.

  As described above, according to the honeycomb structure and the arrangement structure of the honeycomb structure of the present embodiment, the fluid does not flow only through the central portion of the honeycomb structure, and the fluid after passing through the honeycomb structure is disturbed. The fluid can be agitated and flowed.

  In addition, since the honeycomb structure of the present embodiment can be manufactured from a honeycomb structure segment (unprocessed segment) manufactured by a conventional manufacturing method, it is not necessary to introduce new manufacturing equipment, and the manufacturing cost can be reduced. be able to.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, the shape of the segments forming the honeycomb structure, the number of pieces to be joined, the combination of cell axis orientations, the outer shape of the honeycomb structure, and the like are not limited to those of the above-described embodiment. Moreover, the partition walls that partition the cells may be parallel to or intersect with the outer periphery of the segment.

  In addition, as shown in FIG. 10, a segment 41 having a communication portion 9 with which a plurality of cells 6 communicate can be used by removing a part of some of the partition walls 5. In this case, the number of cells 6 and the number of columns communicated can be various. By setting it as such a structure, the flow of the fluid which distribute | circulates a honeycomb structure becomes a more irregular thing, and can disturb the flow of the fluid. In addition, the pressure loss when the fluid flows through the honeycomb structure and the contact area between the fluid and the honeycomb structure can be controlled by the communication portion 9.

1,2,3 honeycomb structure 5 partition 6 cells 10,20 raw segments 11 and 21 segments 12 first end surface 15 assembly 22 segment groups 30 tubes 40 heating device _{P C} cell axis _{P O} orthogonal axes

Claims (4)

A honeycomb structure in which a plurality of segments having a honeycomb structure including a plurality of cells partitioned by partition walls extending in a single direction are joined,
Each of the segments has a cell axis that is a direction in which the partition wall extends with respect to an orthogonal axis that is orthogonal to the first end surface on the upstream side,
The segments are joined such that each of the first end surfaces is the same surface, and the cell axes of two or more segments are in different directions ,
The honeycomb structure according to claim 2, wherein the two or more segments are joined such that a direction in which the cell axis extends turns in the same direction when viewed from the first end face side . The honeycomb structure according to claim 1, wherein each of the segments has a square cross section parallel to the first end surface . The honeycomb structure according to claim 1 or 2, characterized in that the first end face is arranged in a flow path through which a fluid flows so that the first end face is orthogonal to a fluid flow direction . the arrangement of the Ruha honeycomb structure. The honeycomb structure according to claim 1 or 2 , wherein the honeycomb structure is disposed in a flow path through which the fluid circulates so that the first end surface is orthogonal to a flow direction of the fluid, and is separated from each other in the flow path. And a plurality of the honeycomb structures are arranged.

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