JP7356367B2 - Catalytic reactor with ash accumulation prevention function - Google Patents

Description

The present invention relates to a vertical downflow type catalytic reactor and a catalyst block used therein. More specifically, the present invention provides a vertical downflow type catalyst block that can carry in, install, remove, and carry out a catalyst block incorporating a catalyst unit in a short construction period, and has an excellent dust accumulation prevention function. This invention relates to a catalytic reactor and a catalytic block used therein.

For example, in a vertical downflow type catalytic reactor for removing nitrogen oxides (NOx) contained in the exhaust gas of a coal-fired boiler, the short side of the bottom of the catalyst block is supported by a support beam. Several are installed side by side. for reducing exhaust gases flowing between the inner wall of the reactor duct and the catalyst block and between adjacent catalyst blocks without passing through the catalyst unit, or between the inner wall of the reactor duct and the catalyst block and adjacent catalyst blocks. Various structures have been proposed to prevent soot and dust from accumulating between the two.

For example, Patent Document 1 discloses an ash accumulation prevention member that is tightened and fixed to a pack frame at an end face of the catalyst pack, blocking the boundaries between the catalyst packs and the boundary between the catalyst pack and the denitrification reactor casing. A sealing structure for a denitrification device, comprising a packing member held between an accumulation prevention member and a back frame of an end face of a catalyst pack, and a fastener for fastening the ash accumulation prevention member and a back frame of an end face of a catalyst pack. is disclosed.

Patent Document 2 discloses that a plurality of basket bodies are formed adjacent to each other at predetermined intervals in an exhaust gas passage, the sides of which are partitioned, and each of which is filled with a catalyst that decomposes harmful substances in the gas. In this catalyst basket structure, a gable-shaped ash accumulation prevention member is spanned between a plurality of adjacent basket bodies to prevent ash accumulation in the above-mentioned intervals and is attached with a pin or the like. A catalyst basket structure is disclosed.

Patent Document 3 discloses a vertical downflow type flue gas denitrification device that includes a plurality of catalyst blocks incorporating catalyst units and processes exhaust gas discharged from a combustion device to become a vertical downflow. A vertical downflow type flue gas denitrification device is disclosed that includes a first ash accumulation prevention plate and a second ash accumulation prevention plate that are slidable between blocks. The upper part of the first ash accumulation prevention plate has a mountain-shaped structure, and the lower part has a hook inserted between the lower part of the protector disposed on the upper part of the catalyst block and the upper part of the catalyst block. A hanging lug provided for hanging the catalyst block is provided with an elongated hole, and the second ash accumulation prevention plate is removably supported by a locking member provided by penetrating the elongated hole of the hanging lug. .

Patent Document 4 discloses a catalyst block in which a large number of catalyst units in which plate-shaped or lattice-shaped catalyst bodies are laminated and housed in a frame are assembled into a rectangular parallelepiped frame-like case and integrated. In a vertical downflow type catalytic reactor in which a large number of vertical flow downflow type catalytic reactors are arranged in a catalytic reactor main body with the short sides supported by support beams, a lifting fitting is provided on the short side of each corner of the frame-shaped case. At the same time, a sealing material having a circular cross section is provided in the upper part of the gap between the long sides of the catalyst blocks, the contact part between the sealing material and the catalyst block is joined, and the sealing material is provided in the upper part of the gap between the short sides of the catalyst blocks. Disclosed is a vertical downflow type catalytic reactor characterized in that a dust accumulation prevention plate is provided at the top of the catalytic reactor.

Patent Document 5 discloses a mountain-shaped dust adhesion prevention protector mounted on the upstream side of the waste flow between adjacent cases of a plurality of catalyst units arranged side by side in a denitrification reactor, and an inner wall of the denitrification reactor. A protective device for preventing dust adhesion is provided between the gas flow upstream side of the catalyst unit case and the inner wall, which is provided adjacent to the gas flow side of the catalyst unit case, and the dust adhesion prevention device is provided so that its tip is in contact with the inner wall, and the gas flow of the catalyst unit installation rail is provided. a mountain-shaped dust adhesion prevention protector mounted on the upstream side, and a sealing material for sealing the gap between the long sides of the catalyst blocks is provided at the bottom of the gap, and the sealing material and the catalyst block Disclosed is a device for preventing blockage of a catalyst in a denitrification reactor, which is characterized in that the contact portion is joined to the catalyst.

Patent Document 6 discloses a diverter having a shape such as a chevron shape or a T-shape to prevent particulate matter from entering gaps between adjacent catalyst blocks.

Utility Model Publication No. 60-124629 Utility Model Publication No. 60-183030 WO2012/004980A1 Japanese Patent Application Publication No. 2002-219336 Japanese Unexamined Patent Publication No. 58-143828 US2009/0065414A1

The object of the present invention is to provide a vertical downflow catalytic reaction system that can carry in, install, remove, and transport a catalyst block incorporating a catalyst unit in a short construction period, and that also has an excellent dust accumulation prevention function. and a catalyst block used therein.

As a result of studies to solve the above problems, the present invention including the following embodiments was completed.

[1] A reactor duct that allows combustion exhaust gas to flow vertically down,
at least two beams extending horizontally into the reactor duct;
A catalyst block in which a catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
having a first diversion member and a second diversion member;
The catalyst block is spanned between two beams and supported by the two beams, and 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 and adjoin each other. As shown, multiple reactor ducts are installed side by side in the reactor duct.
The frame-shaped case has a stopper member and a spacer member,
The stopper member is attached to the front and/or rear upper part of the frame-shaped case,
The spacer member is attached to the right side and/or left side of the frame-shaped case so as not to block the gap between the right side and left side of the adjacent catalyst block,
The first diversion member is attached to close the gap between the front and rear surfaces of adjacent catalyst blocks from above, and the second diversion member is installed to close the gap between the front and rear surfaces of adjacent catalyst blocks. It is installed so as to close the gap between the
Catalytic reactor.
[2] A stopper member attached to the front and/or rear top of the frame-like case of one catalyst block and a stopper member attached to the rear and/or front top of the frame-like case of another adjacent catalyst block. The catalytic reactor according to [1], wherein the stopper member and the stopper member do not face each other to avoid collision.
[3] The catalytic reactor according to [1] or [2], wherein the stopper member has a threaded portion.

[ 4 ] A reactor duct that allows combustion exhaust gas to flow vertically down,
at least two beams extending horizontally into the reactor duct;
A catalyst block in which a catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
having a first diversion member and a second diversion member;
The catalyst block is spanned between two beams and supported by the two beams, and 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 and adjoin each other. As shown, multiple reactor ducts are installed side by side in the reactor duct.
The frame-shaped case has a first hanging metal fitting , a second hanging metal fitting , and a spacer member,
The first hanging metal fitting is attached to the front and/or rear upper part of the frame-shaped case,
The second hanging metal fitting is attached to the upper part of the rear and/or front of the frame-shaped case,
The spacer member is attached to the right side and/or left side of the frame-shaped case so as not to block the gap between the right side and left side of the adjacent catalyst block,
The first diversion member is attached to close the gap between the front and rear surfaces of adjacent catalyst blocks from above, and the second diversion member is installed to close the gap between the front and rear surfaces of adjacent catalyst blocks. It is installed so as to close the gap between the
Catalytic reactor.
[5] The first hanging fitting attached to the upper part of the front and/or rear face of the frame-like case of one catalyst block, and the upper part of the rear and/or front face of the frame-like case of another adjacent catalyst block. The catalytic reactor according to [4], wherein the attached second hanging metal fittings are not opposed to each other so as not to collide with each other.
[6] The catalytic reactor according to [4] or [5], wherein the first hanging fitting has a threaded portion.

[ 7 ] The frame-shaped case further includes a sealing member,
The catalytic reaction according to any one of [1] to [6], wherein the sealing member is attached to the frame-shaped case so as to seal the lower part between adjacent catalyst blocks and between the two beams. vessel.
[8] The catalytic reactor according to any one of [1] to [7], wherein the spacer member is attached at an upper part of the frame-like case.
[9] The mounting positions of the spacer members are the spacer member attached to the right side of the frame-like case of one catalyst block and the spacer member attached to the left side of the frame-like case of another adjacent catalyst block. The catalytic reactor according to any one of [1] to [8], wherein the and are not opposed to each other so as not to collide.

[ 10 ] A catalyst unit is assembled in a rectangular parallelepiped or cubic frame-shaped case,
The frame-shaped case has a stopper member and a spacer member ,
The stopper member is attached to the front and/or rear upper part of the frame-shaped case,
When the catalyst block is arranged so that the right side and the left side of the frame-like case face each other and are adjacent to each other, the spacer member is attached to the right side and/or the left side of the frame-like case, and the right side of the adjacent catalyst block. It is attached so as not to block the gap between it and the left side.
A catalyst block for use in the catalytic reactor according to [1].

[ 11 ] The catalyst block according to [ 10 ], wherein the stopper member has a threaded portion.

[ 12 ] A catalyst unit is assembled in a rectangular parallelepiped or cubic frame-like case,
The frame-shaped case has a first hanging metal fitting , a second hanging metal fitting , and a spacer member ,
The first hanging metal fitting is attached to the front and/or rear upper part of the frame-shaped case,
The second hanging metal fitting is attached to the upper part of the rear and/or front of the frame-shaped case,
When the catalyst block is arranged so that the right side and the left side of the frame-like case face each other and are adjacent to each other, the spacer member is attached to the right side and/or the left side of the frame-like case, and the right side of the adjacent catalyst block. It is attached so as not to block the gap between it and the left side.
A catalyst block for use in the catalytic reactor described in [ 4 ].

[ 13 ] The catalyst block according to [ 12 ], wherein the first hanging fitting has a threaded portion.

[ 14 ] The frame-shaped case further includes a sealing member ,
The sealing member is attached to the frame-shaped case so as to seal the lower part between adjacent catalyst blocks and between the two beams when the catalyst blocks are arranged adjacently, [10] ~ The catalyst block according to any one of [ 13 ].

[ 15 ] The frame-like case further includes a second diversion member,
The second diversion member is attached to the frame-shaped case so as to close the gap between the right side surface and the left side surface of the adjacent catalyst blocks from above when the catalyst blocks are arranged adjacently. The catalyst block according to any one of [ 10 ] to [ 14 ].

The catalyst blocks of the present invention can be quickly arranged and installed at predetermined intervals between the inner wall of the reactor duct and the catalyst blocks and between adjacent catalyst blocks. The vertical downflow type catalytic reactor of the present invention can carry in, install, remove, and take out a catalyst block incorporating a catalyst unit in a short construction period, and has an excellent dust accumulation prevention function. .

FIG. 2 is a perspective view showing an example of a catalyst unit. FIG. 2 is a perspective view showing an example of a process of manufacturing a catalyst block by assembling a catalyst unit into a frame-shaped case. FIG. 2 is a perspective view showing an example of a catalyst block. It is a perspective view showing an example of the process of assembling a catalyst block, a first diversion member, and a second diversion member to manufacture a catalytic reactor. It is a perspective view showing an example of a first diversion member. It is a perspective view showing an example of a second diversion member. FIG. 3 is a perspective view showing another example of a catalyst block. FIG. 3 is a perspective view showing another example of a catalyst block. FIG. 2 is a side view showing an example of a configuration inside a reactor. It is a front view showing an example of the structure inside a reactor. FIG. 3 is a perspective view showing another example of a catalyst block. It is a figure showing an example of the process of manufacturing a catalyst reactor.

The present invention will be explained in more detail by showing embodiments of the present invention based on the drawings.

The catalytic reactor of the invention has a reactor duct 2, a beam 33, a catalyst block 20, a first diversion member 31, and a second diversion member 32 (see FIG. 9 or 10).

The reactor duct 2 has a vertical flow path through which the combustion exhaust gas can flow vertically down. The cross-sectional shape of the flow path of the reactor duct viewed from the gas flow direction is not particularly limited, but is preferably rectangular. Preferably, the cross-sectional size of the flow path of the reactor duct is approximately the same from the inlet of the reactor duct to the outlet of the reactor duct. Connected to the inlet of the reactor duct is an inlet duct through which flue gas can flow via an exhaust duct of a combustion device such as a boiler. The inlet duct may have a horizontal flow path. A joint duct having a downwardly inclined flow path connecting 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 flow cross-sectional dimensions of the inlet and outlet ducts may be smaller, the same, or larger than that of the reactor duct. A device (for example, a screen plate, a baffle plate, etc.) for uniformly flowing the combustion exhaust gas to the catalyst block 20 can be provided in the reactor duct. Furthermore, a device for supplying a reducing agent such as ammonia can be provided upstream of the catalyst block 20, for example in the upper part of the reactor duct 2, in the inlet duct or in the coupling duct.

A beam 33 runs horizontally into the reactor duct. As shown in FIG. 4 etc., the catalyst block 20 is bridged between two beams and supported by the two beams, and the front and rear surfaces of the frame-shaped case are opposite to each other and are adjacent to each other. A plurality of reactor ducts are installed side by side in the reactor duct so that the right side and left side 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 Figure 4, the catalyst blocks are spanned so that the front or rear faces are parallel to the beam, but they may also be spanned so that the right or left sides are parallel to the beam. good.

The catalyst block 20 is constructed by incorporating at least one catalyst unit 10 into a frame-shaped case 21. Although not shown, legs may be provided at the bottom of the frame-like unit so that the bottom surface of the catalyst unit 10 is at a higher position than the top surface of the beam. The legs are not limited by their shape, and may be cylindrical or lattice-shaped in which the lower part of the frame constituting the frame unit extends downward, or the cylindrical or lattice-shaped leg members may be used as part of the frame unit. It can also be attached to the bottom of the Further, when a plurality of catalyst units are installed in a row in the horizontal direction, it is preferable to provide the legs below the gaps between adjacent catalyst units. When such lattice-shaped legs are provided, the four corners of the bottom surface of the catalyst unit are firmly supported.

The catalyst unit 10 is, for example, one in which a catalyst body 12 is housed in a frame 13 (FIG. 1), or the catalyst body 12 itself. The catalyst body 12 can have a shape such as a lattice shape, a honeycomb shape, a corrugated board shape, or a plate shape. The catalyst body 12 used for the denitrification reaction contains a denitrification catalyst active component. Denitrification catalyst active components include those containing titanium oxides, molybdenum and/or tungsten oxides, and vanadium oxides (titanium-based catalysts); zeolites on which metals such as Cu and Fe are supported, etc. Examples include catalysts mainly containing aluminosilicate (zeolite catalysts); catalysts containing a mixture of titanium catalysts and zeolite catalysts. Among these, titanium-based catalysts are preferred.
Examples of titanium-based catalysts include Ti-VW catalyst, Ti-V-Mo catalyst, Ti-VW-Mo catalyst, and the like.
The ratio of the V element to the Ti element is preferably 2% by weight or less, more preferably 1% by weight or less, as a weight percentage of V ₂ O ₅ /TiO ₂ . The ratio of the Mo element and/or the W element to the Ti element is preferably 10% by weight or less, more preferably 5% by weight or less, as a weight percentage of (MoO ₃ +WO ₃ )/TiO ₂ .
The catalyst body contains P oxide, S oxide, Al oxide (e.g. alumina), Si oxide (e.g. glass fiber), Zr oxide (e.g. zirconia), gypsum (for example, dihydrate gypsum, etc.), zeolite, etc. may be included. These can be used in the preparation of catalysts in the form of powder, sol, slurry, fiber, etc.

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 has an overall rectangular parallelepiped or cubic shape. The frame body 13 has at least an inlet and an outlet so that the combustion exhaust gas G can flow into and out of the area (catalyst layer) in which the catalyst body is accommodated.

It is preferable that the frame-shaped case 21 has a rectangular parallelepiped or a cube shape as a whole. The frame case has at least an inlet and an outlet so that combustion exhaust gas can flow into and out of the catalyst unit. Preferably, the catalyst unit is incorporated and integrated into the frame-shaped case so that its inlet and outlet are on the same side as the inlet and outlet of the frame-shaped case.

(First embodiment)
In the catalyst block 20 shown in FIG. 2 or 3, a frame-like case 21 has a first hanging fitting 22, a second hanging fitting 23, a spacer member 25, and a sealing member 26 as necessary.

The catalyst block 20 can be hung with a hoist or the like by hanging a slinging tool (for example, a wire rope, a wire sling, etc.) on the first hanging fitting 22 and the second hanging fitting 23, or with a special device.

In the catalyst block shown in FIG. 2 or 3, two first hanging fittings 22 are attached to the upper part of the front face of the frame-shaped case, and two second hanging fittings 23 are attached to the upper part of the rear face of the frame-shaped case. It is being

To prevent collision between the first hanging fitting and the second hanging fitting when a plurality of catalyst blocks 20 are installed side by side in the reactor duct so that the front and rear surfaces of the frame-shaped case face each other and are adjacent to each other. Furthermore, it is preferable that the second hanging fitting 23 be attached at a position that does not face the first hanging fitting attached to the upper part of the front surface of the frame-shaped case of the adjacent catalyst block. For example, as shown in Figure 2 or 3, one first hanging metal fitting is attached near both ends of the upper front of the frame-shaped case, and the second hanging metal fitting is attached slightly inward from both ends of the rear side of the frame-shaped case. You can install one in each location. The attachment of the first hanging metal fitting and the second hanging metal fitting to positions where they do not face each other is not limited to these examples, and may be performed in other modes as well. Although not shown, instead of the mounting method shown in FIGS. 2 or 3, for example, one second hanging fitting 23 is attached to the rear of the frame-shaped case near both ends of the upper part, and the first hanging fitting 22 is attached to the frame-shaped case. Alternatively, you can attach one of the first hanging brackets 22 to the front of the frame-shaped case, near the left edge of the top of the front and slightly inside of the top of the rear edge of the frame-shaped case. Attach one piece approximately diagonally on each side, and install the second hanging metal fittings 23 approximately diagonally at a place close to the right edge of the top of the front of the frame-shaped case and a place slightly inward from the left edge of the top of the rear side. You can also install one of each.

The first hanging fitting 22 and the second hanging fitting 23 are not particularly limited by their shapes as long as they can hang a slinging tool. Examples include L-shaped hooks, J-shaped hooks, U-shaped hooks, C-shaped hooks, O-shaped rings, and D-shaped rings.
Preferably, the first hanging fitting 22 further includes a threaded portion. A first diversion member, which will be described later, can be screwed onto the first hanging fitting at the screwing portion. For example, in an L-shaped hook made by bending a flat plate, one flat plate part is provided with a threaded part, and the other flat plate part is attached to a frame-shaped case by welding or the like, and an L-shaped hook is used as the first hanging metal fitting. I can do it. The threaded portion may be provided by drilling a hole at a desired location and threading it, or may be provided by drilling a hole at a desired location and welding a nut to fit the hole.

A member may be attached to the inner wall of the reactor duct facing the front or rear surface of the catalyst block to ensure a gap between the inner wall and the front or rear surface of the catalyst block closest to the inner wall. Furthermore, the inner wall may have a structure for attaching a third diversion member by screwing, inserting, etc. so as to close the gap between the reactor duct and the front or rear surface of the catalyst block. good. The third diversion member may have a similar shape to a first diversion member or a second diversion member described below.

The first hanging fitting 22 and the second hanging fitting 23 may or may not protrude beyond the upper end of the frame-shaped case 21. When the first hanging metal fitting and the second hanging metal fitting are attached so as to protrude upward, they can be used as a guide when stacking the catalyst blocks vertically.
The period between installing a new catalyst block in a reactor duct, using it up, and replacing it can range from several months to several years. During this period, the first hanging metal fitting and the second hanging metal fitting are also useful when inspecting or temporarily replacing a part of the catalyst block, catalyst unit, or catalyst body.

In the catalyst block shown in FIG. 2 or 3, a spacer member 25 is attached to the right side of the frame-shaped case.
The spacer member 25 is used to insert and attach a second diversion member, which will be described later, when a plurality of catalyst blocks are arranged side by side in the reactor duct so that the right side and left side of the frame-shaped case face each other and are adjacent to each other. This is to ensure a gap between the right side and the left side of the frame-shaped case.

In the catalyst block shown in FIG. 2 or 3, one spacer member 25 is attached near both ends of the upper right side of the frame-shaped case, and nothing is attached to the left side. In addition, as long as a gap can be secured between the right side and the left side of the frame-shaped case, two spacer members can be attached to the left side of the frame-shaped case instead of two on the right side of the frame-shaped case. Alternatively, one piece may be attached diagonally to the right side surface near the front and the left side surface near the rear surface, or vice versa. From the viewpoint of ease of insertion of the second diversion member 32, which will be described later, it is preferable that the spacer member be attached to the upper side of the frame-shaped case.
When a plurality of catalyst blocks are installed side by side in a reactor duct so that the right side and left side of the frame-like case face each other and are adjacent to each other, the spacer member attached to the frame-like case of one catalyst block It is preferable to attach the catalyst block at a position that does not face other spacer members attached to the frame-like cases of other catalyst blocks, in order to avoid collision between the two.

A member is attached to the inner wall of the reactor duct facing the right side or left side of the catalyst block to ensure a gap between the left side or right side of the catalyst block that is closest to the inner wall. Good too. Furthermore, the inner wall has a structure for attaching a fourth diversion member by screwing, inserting, etc. so as to close the gap between the reactor duct and the left side or right side of the catalyst block. It's okay. The fourth diversion member may have a similar shape to a first diversion member or a second diversion member, which will be described later.

Since the catalyst block shown in FIG. 2 or 3 is spanned so that the front or rear surface is parallel to the beam, the sealing member 26 is attached to the lower part (preferably the lower end) of the right side of the frame-shaped case. It is being When the catalyst blocks are installed side by side 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 side and the left side is sealed by a sealing member 26. This makes it possible to reduce the amount of combustion exhaust gas that passes through gaps between catalyst blocks without passing through the catalyst layer. Note that as long as the gap between the right side and the left side of the frame case can be sealed, instead of attaching the sealing member to the bottom of the right side of the frame case, the seal member can be attached to the bottom of the left side of the frame case. It may be attached to. The length and width of the sealing member are determined according to the distance between adjacent beams and the size of the gap between the right side and left side of adjacent catalyst blocks, respectively, so as to suppress the passage of combustion exhaust gas. Can be set as appropriate. Note that if the catalyst block is spanned so that the right side or left side is parallel to the beam, a sealing member can be attached to the lower part of the front or rear side. The shape of the sealing member is not particularly limited as long as it can seal combustion exhaust gas, and may be, for example, a flat plate, an L-shaped plate (angle material, etc.), or the like.

In the figure, the first diversion member 31 is attached by screwing to the first hanging fitting so as to close the gap between the front and rear surfaces of adjacent catalyst blocks from above. The first diversion member consists of a first top plate portion 34 having a hole 35 through which a bolt passes. The shape of the first top plate is not limited as long as it can bypass the combustion exhaust gas and guide it to the inlet of the catalyst block. For example, it may be a flat plate as shown in FIG. 5, a chevron-shaped plate, or other shapes. The first diversion member may have a handle on the upper surface side of the first top plate portion for convenience in removal. The first diversion member may be directly or indirectly attached to the catalyst block by a method other than screwing onto the first hanging fitting, such as by inserting it into the gap between the catalyst blocks (insertion). You may go. Preferably, the first diversion member is attached after the catalyst block is installed at a predetermined position on the beam.

The second diversion member 32 is inserted into the gap between the right side and left side in the figure so as to close the gap between the right and left sides of adjacent catalyst blocks from above. installed. The shape of the second diversion member is not limited as long as it can divert the combustion exhaust gas and guide it to the inlet of the catalyst block. For example, it may be a member with a T-shaped cross section consisting of a flat second top plate part 36 and an insertion part 37 as shown in FIG. 6, or a member with a cross section consisting of a chevron-shaped second top plate part and an insertion part. It may be an umbrella-shaped member or may have another shape. The insertion portion of the second diversion member is a portion that can be inserted into the gap between the right side and the left side. The insertion portion is usually flat. In order to prevent it from coming out through the gap, the insertion portion may be shaped like a corrugated plate or a hook. The insertion portion 37 may be made shorter than the second top plate portion so as not to collide with the spacer member 25, or may be provided with a notch to avoid the spacer member. The second diversion member may have a handle on the upper surface side of the second top plate portion for convenience in removal. Note that the direct or indirect attachment of the second diversion member to the catalyst block is not limited to insertion, and may be appropriately performed by, for example, screwing with screws or the like, welding, or the like. The second diversion member can be attached before or after the catalyst block is placed in position on the beam.

When the first diversion member and the second diversion member are attached, the end of the first diversion member and the end of the second diversion member may overlap. For example, when the second diversion member is inserted and the first diversion member is screwed so that the end of the first diversion member overlaps the end of the second diversion member, the second diversion member It is held down by the diversion member and can be firmly attached.

(Second embodiment)
The catalyst block 20a shown in FIG. 7 is similar to the catalyst block of the first embodiment except that the frame-like case 21 has a stopper member 22a, a spacer member 25, and a seal member 26 if necessary, and is smaller in size. It has the structure of The stopper member 22a is attached to the upper part of the front surface. The stopper member 22a has the same structure as the first hanging fitting 22 described above. Furthermore, it is preferable that the stopper member 22a has a threaded portion. The threaded portion may have a similar structure to the threaded portion of the first hanging fitting 22 described above. Two spacer members 25 are attached to the right side. The frame-shaped case may further include a hanging fitting on the top, in addition to the stopper member 22a, for hanging the catalyst block. Note that the first diversion member may be directly or indirectly attached to the catalyst block by a method other than screwing it to the stopper member, such as by inserting it into the gap between the catalyst blocks (insertion). good. Preferably, the first diversion member is attached to the catalyst block after the catalyst block is installed at a predetermined position on the beam. Direct or indirect attachment of the second diversion member to the catalyst block is not limited to insertion, and can be appropriately performed by, for example, screwing with screws or the like, welding, or the like. The second diversion member can be attached to the catalyst block before or after the catalyst block is installed in position on the beam.

(Third embodiment)
In the catalyst block 20b shown in FIG. 8, one spacer member 25 is attached diagonally to the left side surface near the front surface and the right side surface near the rear surface, or vice versa. In addition, one stopper member 22a is attached diagonally to the front surface of the side closer to the left side and the rear surface of the side closer to the right side, or vice versa. It has the same structure as the catalyst block of the embodiment.

(Fourth embodiment)
The catalyst block 20c shown in FIG. 11 is the same as that shown in FIG. 3 except that the second diversion member 32 consisting of only the second top plate is attached to the upper part (preferably the upper end) of the left side of the frame-shaped case. It has a similar structure to the catalyst block. When the catalyst blocks 20c are arranged as shown in FIG. 12, the second diversion member 32 can close the gap between the right side and left side of adjacent catalyst blocks from above. In addition, the second diversion member 32 may be attached to the upper part (preferably the upper end) of the right side surface of the frame-shaped case instead of the upper part (preferably the upper end) of the left side surface of the frame-shaped case. Note that the second diversion member can be attached to the catalyst block by any method such as screwing with screws, welding, insertion, or the like.

(Other embodiments)
The catalyst block of the invention may also be applied partially. Further, a part of the catalyst block of a catalytic reactor configured according to the prior art may be replaced with the catalyst block of the present invention.

1: Inlet duct
2: Reactor duct
3: Exit duct
4: Fitting duct
G: Combustion exhaust gas before denitrification
G': Combustion exhaust gas after denitrification
33: Beam
10: Catalyst unit
12: Catalyst body
13: Frame body
20: Catalyst block
21: Frame-shaped case
22: First hanging metal fitting (also serves as a stopper member)
22a: Stopper member
23: Second hanging bracket
24: Threaded part
25: Spacer member
26: Seal member
31: First diversion member
34: First top plate section
35: Hole for bolting
32: Second diversion member
36: Second top plate section
37: Insertion part

Claims (15)

a reactor duct that allows combustion exhaust gas to flow vertically down;
at least two beams extending horizontally into the reactor duct;
A catalyst block in which a catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
having a first diversion member and a second diversion member;
The catalyst block is spanned between two beams and supported by the two beams, and 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 and adjoin each other. As shown, multiple reactor ducts are installed side by side in the reactor duct.
The frame-shaped case has a stopper member and a spacer member,
The stopper member is attached to the upper part of the front and/or rear surfaces of the frame-shaped cases, and is configured to ensure a predetermined gap between the front and rear surfaces of adjacent frame-shaped cases. Ori,
The spacer member is attached to the right side and/or left side of the frame-like case, and is configured to ensure a predetermined gap between the right side and left side of the adjacent frame-like case. It is composed of
Further, the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and the vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case It is structured so that it does not completely block the
The first diversion member is attached to the upper end of the frame-shaped case so as to extend in the longitudinal and horizontal direction of the gap between the front and rear surfaces of adjacent catalyst blocks and cover and close the gap from above, and the second diversion member is attached to the upper end of the frame-shaped case so as to extend in the longitudinal and horizontal direction of the gap between the right side surface and the left side surface of the adjacent catalyst blocks and cover and close the gap from above. ing,
Catalytic reactor. A stopper member attached to the front and/or rear upper part of the frame-shaped case of one catalyst block, and a stopper member attached to the rear and/or front upper part of the frame-shaped case of another adjacent catalyst block. The catalytic reactor according to claim 1, wherein the catalytic reactors are not opposed to each other so as not to collide. The stopper member has a size smaller than the horizontal and vertical lengths of the front and/or rear surfaces of the frame-shaped case, and is capable of completely closing the gap between the front and rear surfaces of adjacent catalyst blocks. 3. A catalytic reactor according to claim 1 or 2, wherein the catalytic reactor is configured such that no . a reactor duct that allows combustion exhaust gas to flow vertically down;
at least two beams extending horizontally into the reactor duct;
A catalyst block in which a catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
having a first diversion member and a second diversion member;
The catalyst block is spanned between two beams and supported by the two beams, and 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 and adjoin each other. As shown, multiple reactor ducts are installed side by side in the reactor duct.
The frame-shaped case has a first hanging metal fitting, a second hanging metal fitting, and a spacer member,
The first hanging fitting is attached to the upper part of the front and/or rear surfaces of the frame-shaped cases, and is configured to ensure a predetermined gap between the front and rear surfaces of adjacent frame-shaped cases. has been
The second hanging fitting is attached to the rear surface and/or the upper part of the front surface of the frame-shaped case, and is configured to ensure a predetermined gap between the rear surface and the front surface of adjacent frame-shaped cases. has been
The spacer member is attached to the right side and/or left side of the frame-like case, and is configured to ensure a predetermined gap between the right side and left side of the adjacent frame-like case. It is composed of
Further, the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and the vertical length of the right side and/or left side of the frame-shaped case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-shaped case It is structured so that it does not completely block the
The first diversion member is attached to the upper end of the frame-shaped case so as to extend in the longitudinal and horizontal direction of the gap between the front and rear surfaces of adjacent catalyst blocks and cover and close the gap from above, and the second diversion member is attached to the upper end of the frame-shaped case so as to extend in the longitudinal and horizontal direction of the gap between the right side surface and the left side surface of the adjacent catalyst blocks and cover and close the gap from above. ing,
Catalytic reactor. A first hanging fitting attached to the upper part of the front and/or rear side of the frame-shaped case of one catalyst block, and a first hanging fitting attached to the upper part of the rear and/or front side of the frame-shaped case of another adjacent catalyst block. The catalytic reactor according to claim 4, wherein the catalytic reactor is not opposed to the second hanging fitting so as not to collide. The first hanging fitting has a size smaller than the horizontal and vertical lengths of the front and/or rear surfaces of the frame case, and completely closes the gap between the front and rear surfaces of adjacent catalyst blocks. It is configured so that
The second hanging bracket has a size smaller than the horizontal and vertical lengths of the rear and/or front surfaces of the frame-shaped case, and completely closes the gap between the rear and front surfaces of adjacent catalyst blocks. 6. A catalytic reactor according to claim 4, wherein the catalytic reactor is configured such that no The frame-shaped case further includes a sealing member,
The catalytic reactor according to any one of claims 1 to 6, wherein the sealing member is attached to the frame-shaped case so as to seal the lower part between adjacent catalyst blocks and between the two beams. The catalytic reactor according to any one of claims 1 to 7, wherein the spacer member is attached at an upper part of the frame-like case. The mounting positions of the spacer members are such that the spacer member is attached to the right side of the frame-like case of one catalyst block, and the spacer member is attached to the left side of the frame-like case of another adjacent catalyst block. The catalytic reactor according to any one of claims 1 to 8, wherein the catalytic reactor is located at a non-opposing position so as not to collide. The catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
The frame-shaped case has a stopper member and a spacer member,
The stopper member is attached to the upper part of the front and/or rear surface of the frame-shaped case, and when the plurality of catalyst blocks are arranged so that the front and rear surfaces of the frame-shaped case face each other and are adjacent to each other, the stopper member The structure is such that a predetermined gap can be maintained between the front and rear surfaces of the case.
The spacer member is attached to the right side and/or left side of the frame- shaped case ,
Furthermore, when the plurality of catalyst blocks are arranged so that the right side and left side of the frame-like case face each other and are adjacent to each other, the spacer member is arranged to provide a predetermined distance between the right side and the left side of the adjacent frame-like case. It is constructed in such a way that it is possible to secure a gap between
The spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size that is smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size that is smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member is configured to When the catalyst blocks are arranged adjacent to each other, the catalyst blocks are configured so as not to completely block the gap between the right side and the left side of the adjacent catalyst blocks.
A catalyst block for use in the catalytic reactor according to claim 1. The stopper member has a size smaller than the horizontal and vertical lengths of the front and/or rear surfaces of the frame-like case, and is configured to hold the plurality of catalyst blocks so that the front and rear surfaces of the frame-like case face each other and are adjacent to each other. 11. The catalyst block according to claim 10, wherein the catalyst block is configured so as not to completely close the gap between the front and rear surfaces of adjacent catalyst blocks when the catalyst block is disposed in the catalyst block. The catalyst unit is assembled in a rectangular parallelepiped or cubic frame case,
The frame-shaped case has a first hanging metal fitting, a second hanging metal fitting, and a spacer member,
The first hanging fitting is attached to the upper part of the front and /or rear surface of the frame-shaped case, and when the plurality of catalyst blocks are arranged so that the front and rear surfaces of the frame-shaped case face each other and are adjacent to each other, It is configured to ensure a predetermined gap between the front and rear surfaces of the frame-shaped case,
The second hanging metal fitting is attached to the upper part of the rear surface and/or front surface of the frame -shaped case, and when the plurality of catalyst blocks are arranged so that the rear surface and the front surface of the frame-shaped case face each other and are adjacent to each other, , is configured to ensure a predetermined gap between the rear and front surfaces of adjacent frame-shaped cases,
The spacer member is attached to the right side and/or left side of the frame-shaped case,
Furthermore, when the plurality of catalyst blocks are arranged so that the right side and left side of the frame-like case face each other and are adjacent to each other, the spacer member is arranged to provide a predetermined distance between the right side and the left side of the adjacent frame-like case. It is constructed in such a way that it is possible to secure a gap between
The spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size that is smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member has a size that is smaller than the horizontal length and vertical length of the right side and/or left side of the frame-like case, and the spacer member is configured to When the catalyst blocks are arranged adjacent to each other, the catalyst blocks are configured so as not to completely block the gap between the right side and the left side of the adjacent catalyst blocks.
A catalyst block for use in the catalytic reactor according to claim 4. The first hanging bracket has a size smaller than the horizontal and vertical lengths of the front and/or rear surfaces of the frame-like case, and the first hanging metal fitting has a size smaller than the horizontal and vertical lengths of the front and/or rear surfaces of the frame-like case, and the plurality of catalyst blocks are arranged so that the front and rear surfaces of the frame-like case face each other and are adjacent to each other. The structure is such that the gap between the front and rear surfaces of adjacent catalyst blocks is not completely blocked when the catalyst blocks are arranged as shown in FIG.
The second hanging bracket has a size smaller than the horizontal and vertical lengths of the rear and/or front surfaces of the frame-shaped case, and the second hanging metal fitting has a size smaller than the horizontal and vertical lengths of the rear and/or front surfaces of the frame-shaped case, and the second hanging bracket is configured to hold the plurality of catalyst blocks adjacent to each other so that the rear and front surfaces of the frame-shaped case face each other. 13. The catalyst block according to claim 12, wherein the catalyst block is configured so as not to completely close the gap between the rear surface and the front surface of adjacent catalyst blocks when the catalyst block is disposed in such a manner that the catalyst block is disposed in such a manner that the catalyst block does not completely close the gap between the rear surface and the front surface of adjacent catalyst blocks. The frame-shaped case further includes a sealing member,
The sealing member is attached to the frame-shaped case so as to seal the lower part between adjacent catalyst blocks and between the two beams when the catalyst blocks are arranged adjacently. 13. The catalyst block according to any one of 13. The frame-shaped case further includes a second diversion member,
The second diversion member is attached to the frame-shaped case so as to close the gap between the right side surface and the left side surface of the adjacent catalyst blocks from above when the catalyst blocks are arranged adjacently. Catalyst block according to any one of claims 10 to 14.