Catalytic Reactor

Abstract

To provide a vertical down-flow type catalyst reactor capable of performing carrying-in, installation, removal and carrying-out in a short construction period.SOLUTION: A catalyst reactor has: a reactor duct; a horizontally bridged beam 33; a catalyst block 20 assembling a catalyst unit in a rectangular parallelepiped or cube frame-shaped case; a first diversion member 31; a second diversion member 32; and a third diversion member 38. The catalyst block 20 is supported by the beam 33 bridged between at least two beams 33. A plurality of catalyst blocks is arranged in the reactor duct so that a front surface and a rear surface of the catalyst block 20 are relatively and adjacently faced and a right side surface and a left side surface of the catalyst block 20 are relatively and adjacently faced. Carrying-in, installation, removal and carrying-out can be performed in a short construction period.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a vertical downflow type catalytic reactor. More specifically, the present invention relates to a vertical downflow type catalytic reactor that can carry in and install, and remove and transport, a catalyst block incorporating a catalyst unit, in a short construction period and has an excellent function of preventing soot accumulation. [Background technology]

[0002] In a vertical downflow catalytic reactor for removing nitrogen oxides (NOx) contained in exhaust gas from a boiler, etc., multiple catalytic blocks are arranged side by side, for example, with the short sides of the bottom of each catalytic block supported by a support beam. Various structures have been proposed to reduce the amount of exhaust gas that flows between the inner wall of the reactor duct and the catalytic block and between adjacent catalytic blocks without passing through the catalytic unit, or to prevent soot from accumulating between the inner wall of the reactor duct and the catalytic block and between adjacent catalytic blocks.

[0003] For example, Patent Document 1 discloses a sealing structure for a denitration device that includes an ash deposition prevention member that seals the boundaries between catalyst packs and the boundaries between the catalyst pack and a denitration reactor casing and is fastened to a pack frame on the end face of the catalyst pack, a gasket member that is sandwiched between the ash deposition prevention member and the back frame on the end face of the catalyst pack, and a fastener that fastens the ash deposition prevention member to the back frame on the end face of the catalyst pack.

[0004] Patent Document 2 discloses a catalyst basket structure in which a plurality of basket bodies, each having a partitioned side and filled with a catalyst that decomposes harmful substances in the gas, are formed adjacent to each other at a specified interval within an exhaust gas passage, and the catalyst basket structure is characterized in that an ash deposition prevention member is attached in a sealed state between the partition walls on the upstream side of the exhaust gas flow of the plurality of adjacent basket bodies so as to close the interval and prevent the intrusion of ash in the gas.

[0005] Patent Document 3 discloses a vertical downflow type flue gas denitration device that is provided with multiple catalyst blocks each incorporating a catalyst unit and treats exhaust gas discharged from a combustion device and flows vertically downflow, and that is provided with a first ash deposit prevention plate and a second ash deposit prevention plate that can slide into the gap between adjacent catalyst blocks. The upper part of the first ash deposit prevention plate has a mountain-shaped structure, and the lower part has a hook that is inserted between the lower part of a protector placed on the upper part of the catalyst block and the upper part of the catalyst block. A long hole is provided in a hanging lug provided for hanging the catalyst block, and the second ash deposit prevention plate is detachably supported by a locking member provided to pass through the long hole of the hanging lug.

[0006] Patent Document 4 discloses a vertical-flow downflow catalytic reactor in which a number of catalyst blocks are integrated into a rectangular frame case by stacking plate-shaped or lattice-shaped catalyst bodies and housing them in a frame, and the catalyst blocks are arranged in a catalytic reactor body such that the short sides of the bottom of the catalyst blocks are supported by support beams. The vertical-flow downflow catalytic reactor is characterized in that a lifting metal fitting is provided on each of the short sides of each corner of the frame case, a seal material with a circular cross section is provided at the upper part of the gap between the long sides of the catalyst blocks, the contact parts of the seal material and the catalyst blocks are joined, and a dust accumulation prevention plate is provided at the upper part of the gap between the short sides of the catalyst blocks.

[0007] Patent Document 5 discloses a device for preventing clogging of a catalyst in a denitration reactor, characterized in that it comprises: a mountain-shaped dust adhesion prevention protective device attached to the upstream side of the gas flow between adjacent cases of catalyst units arranged in a row in a denitration reactor; a dust adhesion prevention protective device installed between the upstream side of the gas flow of the case of a catalyst unit arranged adjacent to the inner wall of the denitration reactor and the inner wall so that its tip is in contact with the inner wall; and a mountain-shaped dust adhesion prevention protective device attached to the upstream side of the gas flow of a rail for installing the catalyst units.

[0008] Patent Document 6 discloses a diverter having a mountain shape, T shape, or the like, for preventing particulate matter from entering the gap between adjacent catalyst blocks.

[0009] Patent Document 7 discloses a denitration reactor in which catalyst block support beams are provided in multiple stages within a casing that forms an exhaust gas flow path, with catalyst blocks disposed on the catalyst block support beams, and the catalyst blocks are disposed on each catalyst support beam with a gap therebetween, and an ash deposition prevention device having a gas straightening function is provided to seal the gap. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Utility Model Application Publication No. 62-124629 [Patent Document 2] Japanese Utility Model Application Publication No. 60-183030 [Patent Document 3] WO2012 / 004980A1 [Patent Document 4] JP 2002-219336 A [Patent Document 5] Japanese Patent Application Publication No. 58-143828 [Patent Document 6] US2009 / 0065414A1 [Patent Document 7] JP 2003-112015 A Summary of the Invention [Problem to be solved by the invention]

[0011] The object of the present invention is to provide a vertical downflow type catalytic reactor in which a catalyst block incorporating a catalytic unit can be transported, installed, and removed in a short construction period and which has an excellent function of preventing soot accumulation, and a catalyst block used therein. [Means for solving the problem]

[0012] As a result of investigations aimed at solving the above problems, the present invention has been completed, including the following aspects.

[0013] [1] A reactor duct capable of allowing combustion exhaust gas to flow vertically downflow; A horizontal beam runs through the reactor duct. A catalyst block formed by incorporating a catalyst unit into a rectangular or cubic frame case; A first diversion member; A second diversion member, and Third diversion member having The catalyst blocks are supported by at least two beams and are arranged in a row in the reactor duct such that the front and rear surfaces of the catalyst blocks face each other and are adjacent to each other, and the right and left side surfaces of the catalyst blocks face each other and are adjacent to each other; The first diversion member is attached so as to close a gap between the front surface and the rear surface of the adjacent catalyst block from above, The second diversion member is attached so as to close the gap between the right side surface and the left side surface of the adjacent catalyst block from above, The third diversion member is attached so as to cover the longitudinal ends of the first diversion member and the second diversion member and to close the gaps between adjacent catalyst blocks not closed by the first diversion member and the second diversion member. Catalytic reactor.

[0014] [2] A catalytic reactor as described in [1], in which the short-side ends of the first diversion member and the second diversion member are inserted into a gap between the frame-shaped case and the catalytic unit. [3] The catalyst block further has a grating member attached to an opening on the top surface of the frame-shaped case; A catalytic reactor as described in [1], wherein the short-side ends of the first diversion member and the second diversion member are inserted into the gap between the frame-shaped case and the grating member. [4] The catalytic reactor according to [3], wherein the catalyst block further has a mesh member attached onto the grating member.

[0015] [5] The frame-shaped case has lugs attached to the upper portions of at least two of the front, rear, right and left sides; The catalytic reactor according to any one of [1] to [4], wherein the third diversion member is fastened to a lug. [6] The catalytic reactor according to any one of [1] to [5], wherein the frame-shaped case further has a sealing member attached so as to seal a lower portion of a gap between adjacent catalyst blocks.

[0016] [7] A catalytic converter having a catalytic unit assembled in a rectangular or cubic frame case; A grating member is attached to the opening on the top surface of the frame-shaped case. Catalyst block. [8] The catalyst block according to [7], further comprising a mesh member attached onto the grating member. Effect of the Invention

[0017] The vertical downflow type catalytic reactor of the present invention allows the catalyst block incorporating a catalyst unit to be carried in, installed, removed and carried out in a short construction period, and has an excellent function of preventing the accumulation of soot and dust. [Brief description of the drawings]

[0018] [Figure 1] FIG. 4 is a perspective view showing an example of a state in which a catalyst unit is assembled into a frame-shaped case. [Diagram 2] FIG. 2 is a perspective view showing an example of a catalyst unit. [Diagram 3] 1 is a perspective view showing an example of a situation in which a grating member and a mesh member are attached to a frame-shaped unit. FIG. [Figure 4] FIG. 2 is a perspective view showing an example of a catalyst block. [Diagram 5] FIG. 2 is a perspective view showing a first diversion member 31. [Figure 6] 2 is a perspective view showing a second diversion member 32. FIG. [Figure 7] 2 is a perspective view showing a second diversion member 34. FIG. [Figure 8] FIG. 4 is a perspective view showing a third diversion member 38. [Figure 9] 13 is a perspective view showing a second diversion member 132. FIG. [Figure 10] FIG. 2 is a perspective view showing a first diversion member 131. [Figure 11] 1 is a perspective view showing an example of a process for manufacturing a catalytic reactor by assembling a catalyst block, a first diversion member, a second diversion member and a third diversion member. FIG. [Figure 12] 1 is a diagram viewed from direction A showing an example of an arrangement when a first diversion member 31, a second diversion member 32 and a third diversion member 38 are attached to gaps between catalyst blocks. [Figure 13] 13 is a diagram showing the arrangement shown in FIG. 12 as viewed from direction B. [Figure 14] 1 is a diagram viewed from direction A showing an example of an arrangement when a first diversion member 31, a second diversion member 132 and a third diversion member 38 are attached to gaps between catalyst blocks. [Figure 15] 15 is a diagram of the arrangement shown in FIG. 14 as viewed from direction B. [Figure 16] 1 is a diagram viewed from direction A showing an example of an arrangement when a first diversion member 131, a second diversion member 132 and a third diversion member 38 are attached to gaps between catalyst blocks. [Figure 17] 17 is a diagram of the arrangement shown in FIG. 16 as viewed from direction B. [Figure 18] FIG. 1 is a diagram showing an example of a denitrification reactor of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The embodiments of the present invention will now be described in more detail with reference to the drawings.

[0020] One embodiment of the catalytic reactor of the present invention comprises a reactor duct 2 , a beam 33 , a catalyst block 20 , a first diversion member 31 , a second diversion member 32 and a third diversion member 37 .

[0021] FIG. 18 is a diagram showing one embodiment of the denitration reactor of the present invention. The reactor duct 2 has a vertical flow path that allows the combustion exhaust gas to flow vertically downflow. The cross-sectional shape of the flow path of the reactor duct as viewed from the gas flow direction is not particularly limited, but is preferably rectangular. The size of the flow path cross section of the reactor duct is preferably approximately the same from the inlet of the reactor duct to the outlet of the reactor duct. The inlet duct 1 that allows the combustion exhaust gas to flow through an exhaust duct of a combustion device such as a boiler is connected to the inlet of the reactor duct. The inlet duct may have a horizontal flow path. A joint duct 4 having a downward inclined flow path that connects the horizontal flow path and the vertical flow path may be provided between the inlet duct having the horizontal flow path and the reactor duct 2 having the vertical flow path. The size of the flow path cross section of the inlet duct 1 and the outlet duct 5 may be smaller, the same, or larger than that of the reactor duct. A device (e.g., a screen plate, a straightening plate, etc.) for flowing the combustion exhaust gas evenly to the catalyst block 20 may be provided in the reactor duct. Furthermore, a device for supplying a reducing agent, such as ammonia, may be provided upstream of the catalyst block 20, for example in the upper part of the reactor duct 2, in the inlet duct 1 or in the joint duct 4.

[0022] A beam 33 is horizontally stretched in the reactor duct. As shown in FIG. 11, the catalyst block 20 is supported by at least two beams and is installed in the reactor duct in a line such that the front and rear surfaces of the frame-shaped case face each other and are adjacent to each other, and the right and left sides of the frame-shaped case face each other and are adjacent to each other. The beam 33 usually has a box-shaped, H-shaped, or T-shaped cross section. In FIG. 11, the catalyst block is stretched so that the front or rear surface is parallel to the beam, but instead, the right or left side may be parallel to the beam. The arrangement of the catalyst blocks 20 within the reactor duct is not particularly limited. For example, in FIG. 18, catalyst blocks having a two-tiered catalyst unit structure may be arranged in one row as in the bottom row, catalyst blocks having a two-tiered catalyst unit structure may be arranged in two rows as in the middle row, or catalyst blocks having a two-tiered catalyst unit structure and catalyst blocks having a single-tiered catalyst unit structure may be arranged in one row each as in the top row.

[0023] The catalyst block 20 is formed by incorporating at least one catalyst unit 10 into a frame-shaped case 21. Although not shown in the figure, legs may be provided at the bottom of the frame-shaped case so that the bottom surface of the catalyst unit 10 is higher than the upper surface of the beam. The legs are not limited by their shape, and may be cylindrical or lattice-shaped with the lower part of the frame constituting the frame-shaped case extended downward, or a cylindrical or lattice-shaped leg member may be attached to the bottom surface of the frame-shaped case. In addition, when multiple catalyst units are assembled in a horizontal line, it is preferable to provide the legs below the gaps between adjacent catalyst units. By providing such lattice-shaped legs, the four corners of the bottom surface of the catalyst unit are firmly supported.

[0024] As shown in Fig. 3, the catalyst block preferably further has a grating member 40 attached to the opening in the top surface of the frame-shaped case. The catalyst block preferably further has a mesh member 41 attached on top of the grating member 40. The grating member is a metal lattice-like board. The grating member usually comprises a bearing plate (main member), end plates, and twist bars. By attaching the grating member, it becomes possible to place heavy objects or people on the catalyst block.

[0025] The catalyst unit 10 is, for example, a catalyst body 12 housed in a frame body 13 (FIG. 2) or the catalyst body 12 itself. The catalyst body 12 can be in the form of a lattice, a honeycomb, a corrugated board, a plate, or the like. The catalyst body 12 used in the denitration reaction contains a denitration catalytic active component. Examples of the denitration catalytic active component include those containing oxides of titanium, oxides of molybdenum and / or tungsten, and oxides of vanadium (titanium-based catalysts); those containing mainly aluminosilicates such as zeolite carrying metals such as Cu and Fe (zeolite-based catalysts); and those made by mixing titanium-based catalysts and zeolite-based catalysts. Of these, titanium-based catalysts are preferred.

[0026] Examples of titanium-based catalysts include Ti-VW catalysts, Ti-V-Mo catalysts, and Ti-VW-Mo catalysts. The ratio of V to Ti is V 2 O 5 / TiO 2 The weight percentage of Mo and / or W is preferably 2% by weight or less, more preferably 1% by weight or less. The ratio of Mo and / or W to Ti is (MoO 3 +WO 3 ) / TiO 2 The weight percentage of is preferably 10% by weight or less, and more preferably 5% by weight or less. The catalyst body may contain, as a promoter or additive, an oxide of P, an oxide of S, an oxide of Al (e.g., alumina), an oxide of Si (e.g., glass fiber), an oxide of Zr (e.g., zirconia), gypsum (e.g., gypsum dihydrate), zeolite, etc. These can be used in the form of powder, sol, slurry, fiber, etc., during catalyst preparation.

[0027] The shape of the frame 13 is not particularly limited as long as it can accommodate the catalyst body 12, but it is preferable that the frame 13 is generally rectangular parallelepiped or cubic. The frame 13 has at least an inlet and an outlet so that the combustion exhaust gas G can flow into the area (catalyst layer) where the catalyst body is accommodated and flow out from the catalyst layer.

[0028] The frame case 21 is preferably in the shape of a rectangular parallelepiped or a cube as a whole. The frame case has at least an inlet and an outlet so that the combustion exhaust gas can flow into and out of the catalytic unit. The catalytic unit is preferably built into and integrated in the frame case so that the inlet and outlet are on the same side as the inlet and outlet of the frame case.

[0029] The frame-shaped case 21 is provided with a hanging fitting for hanging the catalyst block 20 with a hoist or a dedicated tool by hanging a sling (e.g., a wire rope, a wire sling, etc.). In the drawing, a lug 25 is depicted as the hanging fitting, but this is not limited thereto. The hanging fitting (lug) is not particularly limited in terms of its shape as long as it can hang the slinging fitting. Examples of the hanging fitting (lug) include an L-shaped hook, a J-shaped hook, a U-shaped hook, a C-shaped hook, an O-shaped ring, and a D-shaped ring. Alternatively, the upper fascia of the frame-shaped case 21 may simply have a hole through which the slinging fitting can pass. Furthermore, a spacing member for ensuring a gap between adjacent catalyst blocks may be attached to the frame-shaped case 21. The spacing member makes it easy to make the size of the gap uniform.

[0030] The inner wall of the reactor duct may be provided with a spacing member for ensuring a gap between the inner wall and the catalyst block closest to the inner wall. Furthermore, the inner wall may have a structure for attaching a fourth diversion member by screwing, inserting, or the like so as to close the gap between the inner wall of the reactor duct and the catalyst block. The fourth diversion member may have a size and shape according to the shape of the gap between the inner wall of the reactor duct and the catalyst block, and may have a structure similar to that of the first, second, or third diversion member described below, or may have another structure.

[0031] The hanging fitting may or may not protrude upward beyond the upper end of the frame-shaped case 21. If the hanging fitting is attached so as to protrude upward, it can serve as a guide when stacking the catalyst blocks vertically. In addition, when attaching the third diversion member, the hanging fitting can be used, for example, in a manner described below.

[0032] The catalyst block 20 shown in FIG. 4 is spanned so that the front or rear surface is parallel to the beam, and therefore the seal member 26 is attached to the lower part (preferably the lower end) of the right side of the frame case. When the catalyst blocks are arranged in a line in the reactor duct, the lower part of the gap between the front and rear surfaces is sealed by the beam. The lower part of the gap between the right and left sides is sealed by the seal member 26. This makes it possible to reduce the amount of combustion exhaust gas that passes through the gap between the catalyst blocks without passing through the catalyst layer. Note that, as long as the gap between the right and left sides of the frame case can be sealed, the seal member may be attached to the lower part of the left side of the frame case instead of the lower part of the right side of the frame case. The length and width of the seal member can be appropriately set according to the distance between the adjacent beams and the size of the gap between the right and left sides of the adjacent catalyst blocks so as to suppress the passing of the combustion exhaust gas. When the catalyst block is spanned so that the right or left side is parallel to the beam, a seal member can be attached to the lower part of the front or rear face. The shape of the seal member is not particularly limited as long as it can seal the combustion exhaust gas, and can be, for example, a flat plate or an L-shaped plate (such as an angle bar).

[0033] The first diversion member 31 is attached so as to close the gap between the front and rear sides of the adjacent catalyst blocks from above. The second diversion members 32 and 34 are attached so as to close the gap between the right and left sides of the adjacent catalyst blocks from above. The second diversion member 34 can be used, for example, in a catalyst block adjacent to the inner wall of the reactor duct. The second diversion member 34 may have a hole (hereinafter referred to as a bolt hole) that can be used for passing a bolt, etc., on the longitudinal end 34c side closer to the inner wall of the reactor duct. The bolt hole may have a threaded portion by tapping or burring, or may not have a threaded portion. In the bolt hole that does not have a threaded portion, a bolt can be screwed in with a nut. The bolt hole may have a shape such as a perfect circle hole, an oval hole, a slit hole, or a potbellied hole.

[0034] 13 showing one embodiment, the short-side end 31b of the first diversion member 31 is inserted into the gap between the frame-shaped case 21 and the catalyst unit 10, or into the gap between the frame-shaped case 21 and the grating member 40. To prevent the short-side end 31b from slipping out of the gap, the short-side end 31b may be corrugated or hook-shaped.

[0035] 12 showing one embodiment, the short-side end 32b of the second diversion member 32 is inserted into the gap between the frame-shaped case 21 and the catalyst unit 10, or into the gap between the frame-shaped case 21 and the grating member 40. To prevent the short-side end 32b from slipping out of the gap, the short-side end 32b may be corrugated or hook-shaped. In this embodiment, the first diversion member 31 and the second diversion member 32 do not need to be welded or screwed to a frame-shaped case or the like, but may be welded or screwed to make them more sturdy.

[0036] The first and second diversion members are not limited in shape as long as they can divert the combustion exhaust gas to the side and guide it to the inlet of the catalyst block. In a preferred embodiment, the first and second diversion members are formed in an upwardly convex mountain shape, a rectangle, or a polygon. The first and second diversion members may have a handle on the upper surface side for convenience in removal. The first and second diversion members are preferably attached after the catalyst block is placed in a predetermined position on the beam.

[0037] When the first diversion member and the second diversion member are attached, there may be a gap between the longitudinal end 31a of one first diversion member and the longitudinal end 31a of another first diversion member, or between the longitudinal end 32a of one second diversion member and the longitudinal end 32a of another second diversion member. If there is no gap between the longitudinal end 31a of one first diversion member and the longitudinal end 31a of another first diversion member, and between the longitudinal end 32a of one second diversion member and the longitudinal end 32a of another second diversion member, the structure of each end, especially the structure of the part where the first diversion member and the second diversion member intersect, becomes complicated, high dimensional accuracy is required, or construction takes a long time.

[0038] The third diversion member 38 is attached so as to cover the longitudinal ends 31a, 32a (or 34a) of the first and second diversion members and to close the gap between adjacent catalyst blocks that is not closed by the first and second diversion members. The third diversion member may have a handle on the upper surface side for convenience in removal. In this embodiment, as shown in FIG. 12, the end 31a of the first diversion member 31 is held down by the end 38b of the third diversion member 38, and as shown in FIG. 13, the end 32a of the second diversion member 32 is held down by the end 38a of the third diversion member 38.

[0039] In the preferred embodiment shown in the figures, the third diversion member 38 is provided with a bolt hole. The position of the bolt hole can be designed to generally coincide with the position of the hanging fitting 25 on the frame-shaped case. As shown in Figures 12 and 13, the bolt hole can be used to screw the third diversion member 38 to the hanging fitting 25, for example, with a bolt 43 and a nut 42. The covered portion of the third diversion member holds down the ends of the first diversion member and the second diversion member, eliminating the need to weld or screw the first diversion member and the second diversion member to the frame-shaped case or the like.

[0040] In another embodiment of the present invention shown in Figures 14 and 15, a third diversion member 38, a first diversion member 31 and a second diversion member 132 are used. In this embodiment, as shown in Figure 14, the end 31a of the first diversion member 31 is held down by the end 38b of the third diversion member 38, and as shown in Figure 15, the end 132a of the second diversion member 132 is held down by the end 38a of the third diversion member 38. As shown in Figure 9, the second diversion member 132 has a bolt hole at a position corresponding to the bolt hole of the third diversion member 38. Using this bolt hole, for example, the third diversion member 38 and the second diversion member 132 can be screwed to the hanging bracket 25 by a bolt 43 and a nut 42.

[0041] In another embodiment of the present invention shown in FIG. 16 and FIG. 17, a third diversion member 38, a first diversion member 131, and a second diversion member 132 are used. As shown in FIG. 10, a bent portion is provided at the end 131a in the longitudinal direction of the first diversion member 131. In this embodiment, as shown in FIG. 16, the first diversion member 131 is held down by the end 38b of the third diversion member 38 so that the bent portion at the end 131a is inserted inside the end 38b in the lateral direction of the third diversion member 38, and as shown in FIG. 17, the end 132a of the second diversion member 132 is held down by the end 38a of the third diversion member 38. A bolt hole is provided in the second diversion member 132 at a position corresponding to the bolt hole of the third diversion member 38. Using this bolt hole, for example, the third diversion member 38 and the second diversion member 132 can be screwed to the hanging bracket 25 by a bolt 43 and a nut 42. The shape of the bent portion at the end portion 131a is not limited to that shown in the figure, and it may be such that only the end portion 131a is thickened to form a bank-like shape.

[0042] (Other embodiments) The catalytic reactor of the present invention may be a reactor in which the above-mentioned arrangement of the catalyst block, the first diversion member, the second diversion member, and the third diversion member is partially or entirely applied. Also, a part of the arrangement in the catalytic reactor constructed by the conventional technology may be replaced with the arrangement of the catalyst block, the first diversion member, the second diversion member, and the third diversion member of the present invention. [Explanation of symbols]

[0043] 1: Inlet duct 2: Reactor duct 3: Exit duct 4: Joint duct G: Combustion exhaust gas before denitrification G': Combustion exhaust gas after denitrification 10: Catalyst unit 12: Catalyst body 13:Frame body 20: Catalyst block (catalyst unit two-stage structure) 21: Frame-shaped case 25: Lifting lug 26: Sealing material 20': Catalyst block (single-stage catalyst unit structure) 31: First diversion component 31a: Longitudinal end 31b: Short end 131: First diversion member (both ends bent) 131a: Longitudinal end 131b: Short end 32: Second diversion member (without bolt holes) 32a: Longitudinal end 32b: Short end 132: Second diversion member (bolt holes on both ends) 132a: Longitudinal end 132b: Short end 33: Beam 34: Second diversion member (bolt hole at one end) 34a: Longitudinal end 34b: Short end 38: Third diversion member 38a: Longitudinal end 38b: Short end 42: Nut 43: Bolt 40: Grating material 41: Net member 50: Gap between front and back 51: Gap between right and left side

Claims

1. A reactor duct that allows the combustion exhaust gas to flow vertically downflow; A horizontal beam runs through the reactor duct. A catalyst block formed by incorporating a catalyst unit into a rectangular or cubic frame case; A first diversion member; A second diversion member, and Third diversion member having The catalyst blocks are supported by at least two beams and are arranged in a row in the reactor duct such that the front and rear surfaces of the catalyst blocks face each other and are adjacent to each other, and the right and left side surfaces of the catalyst blocks face each other and are adjacent to each other; The first diversion member is attached so as to close a gap between the front surface and the rear surface of the adjacent catalyst block from above, The second diversion member is attached so as to close the gap between the right side surface and the left side surface of the adjacent catalyst block from above, The third diversion member is attached so as to cover each of the longitudinal ends of the first diversion member and the longitudinal ends of the second diversion member and to close a gap between adjacent catalyst blocks that is not closed by the first diversion member and the second diversion member. Catalytic reactor.

2. 2. The catalytic reactor according to claim 1, wherein the short ends of the first diversion member and the second diversion member are inserted into a gap between the frame case and the catalytic unit.

3. The catalyst block further has a grating member attached to an opening on the top surface of the frame-shaped case, 2. The catalytic reactor according to claim 1, wherein the short-side ends of the first diversion member and the second diversion member are inserted into a gap between the frame-shaped case and the grating member.

4. 4. The catalytic reactor of claim 3, wherein the catalyst block further comprises a mesh member attached onto the grating member.

5. The frame-like case has lugs attached to the upper portions of at least two of its surfaces, the front surface, the rear surface, the right surface, and the left surface; The catalytic reactor according to any one of claims 1 to 4, wherein the third diversion member is fastened to the lug.

6. 6. The catalytic reactor according to claim 1, wherein the frame-like case further comprises a seal member attached to seal a lower portion of a gap between adjacent catalyst blocks.

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