TW202133920A - Catalytic reactor with ash deposition prevention feature - Google Patents

Abstract

A catalytic reactor comprising a reactor duct, at least two beams, a catalyst block comprising comprises a frame-shaped case and a catalyst unit set in the frame-shaped case, a first diversion member and a second diversion member, wherein the beam is horizontally provided inside the reactor duct, the catalyst block is bridged between two beams to be supported by two beams, the catalyst blocks are laid side by side and adjacent to each other in the reactor duct so that the front surface and the rear surface of the frame-shaped case face each other and the right side surface and the left side surface of the frame-shaped case face each other, the frame-shaped case has a stopper member attached to the upper part of the front and / or rear surface, and a spacer member attached to the right side surface and / or the left side surface, the first diversion member is attached so as to close the gap between the front surface and the rear surface of the adjacent catalyst blocks from above, and 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 blocks from above.

Description

Catalytic reactor with dust prevention function

The present invention relates to a vertical downflow catalyst reactor and a catalyst box used therefor. In more detail, the present invention relates to a vertical downflow catalyst reactor and a catalyst box used therefor. It can carry in and set up the catalyst box assembled with the catalyst unit, and even remove and unload it. It can be carried out in a short construction period and has excellent functions to prevent coal dust accumulation.

A vertical downflow catalyst reactor used to remove nitrogen oxides (NOx) contained in the exhaust gas of coal-fired boilers. For example, support beams are used to support the short sides of the bottom surface of the catalyst box, and the catalyst boxes are arranged side by side. Set multiple. In order to reduce the exhaust gas flowing between the inner wall of the reactor channel and the catalyst box and between adjacent catalyst boxes without passing through the catalyst unit, or to prevent it from flowing between the inner wall of the reactor channel and the catalyst box When coal dust accumulates between adjacent catalyst boxes, various structures have been proposed.

For example, Patent Document 1 discloses a sealing structure of a denitrification device, which includes: plugging and locking the boundary between the catalyst packs and the boundary between the catalyst pack and the denitration reactor housing The dust prevention member of the back frame of the end face of the catalyst pack, the filler member sandwiched between the dust prevention member and the back frame of the end face of the catalyst pack, and the difference between the dust prevention member and the end face of the catalyst pack A fixture that the dorsal frame is to conclude.

Patent Document 2 discloses a catalyst basket structure in which a plurality of basket bodies filled with catalysts for decomposing harmful substances in the gas are emptied in the exhaust passage with the side part being partitioned. A predetermined interval is formed adjacent to each other, and a hard mountain-shaped dust-preventing member is installed between a plurality of adjacent basket bodies to prevent accumulation of ash in the above-mentioned interval and installed with pins or the like.

Patent Document 3 discloses a vertical flow downflow type fume exhaust denitrification device, which is provided with a plurality of catalyst boxes assembled with a catalyst unit to process exhaust gas discharged from the combustion device and become vertical flow downflow. The adjacent catalyst box The first slidable dust prevention board and the second dust prevention board are provided in the gap. The upper part of the aforementioned first dust prevention plate has a mountain-shaped structure, and the lower part has a hook inserted between the lower part of the guard arranged on the upper part of the catalyst box and the upper part of the catalyst box. A hanger provided for hanging the catalyst box is provided with a long hole, and the second dust accumulation prevention plate is supported so as to be detachable by a locking member provided by penetrating the long hole of the hanger.

Patent Document 4 discloses a vertical downflow type catalyst reactor. The catalyst box is a catalyst unit in which plate-like or grid-like catalysts are stacked and housed in a frame, and most of them are assembled in a rectangular box-shaped housing to integrate them. The catalyst box uses support beams to support the short sides of the bottom surface of the catalyst box and most of them are arranged in the main body of the catalyst reactor. Metal fittings for hanging are installed respectively, and a sealing material with a circular cross-section is installed on the upper part of the gap between the long sides of the catalyst boxes, and the sealing material is joined to the contact part between the aforementioned catalyst box, and A dust accumulation prevention plate is provided on the upper part of the gap between the short sides of the aforementioned catalyst boxes.

Patent Document 5 discloses a device for preventing the clogging of catalysts in a denitration reactor, and is characterized by having a mountain-shaped protective device for preventing dust adhesion, which is installed in the denitration reactor with a plurality of catalysts arranged side by side The upstream side of the gas flow between the housings adjacent to the unit; a protective device for preventing dust adhesion, which is located adjacent to the inner wall of the denitration reactor on the upstream side of the gas flow of the housing of the catalyst unit and the inner wall Between them, they are arranged so that the front end is in contact with the inner wall; a mountain-shaped protective device for preventing dust adhesion, which is installed on the upstream side of the gas flow of the track for installing the catalyst unit; and between the long sides of the catalyst boxes. The lower part of the gap is provided with a sealing material to seal the gap to join the contact portion between the sealing material and the catalyst box.

Patent Document 6 discloses a divertor that has a shape such as a mountain shape, a T shape, etc., so that particulate matter does not enter the gap between adjacent catalyst boxes. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Unexamined Publication No. 60-124629 [Patent Document 2] Japanese Unexamined Publication No. 60-183030 [Patent Document 3] WO2012/004980A1 [Patent Document 4] JP 2002-219336 A [Patent Document 5] Japanese Patent Application Laid-Open No. 58-143828 [Patent Document 6] US2009/0065414A1

[The problem to be solved by the invention]

The subject of the present invention is to provide a vertical downflow catalyst reactor and a catalyst box used therefor, which can carry in and set up the catalyst box assembled with the catalyst unit, and even remove and carry it out. The construction period is to be carried out, and it has an excellent function of preventing the accumulation of coal dust. [Technical means to solve the problem]

As a result of the review in order to solve the above-mentioned problems, the present invention including the following aspects has been completed.

[1] A catalytic reactor with: The reactor channel, which can make the combustion exhaust gas flow into a vertical downward flow; At least two beams, which are erected horizontally in the reactor channel; The catalyst box is formed by assembling the catalyst unit in a cuboid or cubic frame-shaped shell; The first diversion member; and The second guide member, The catalyst box straddles between the two beams and is supported by the two beams. The front and back sides of the frame-shaped housing are opposed to each other, and the right side and left side of the frame-shaped housing are opposed to each other. The inner plurals are arranged side by side, The frame-shaped housing has: a stopper member installed on the upper part of the front and/or rear side, and a gasket member installed on the right side and/or left side, The first guide member is installed in such a way as to plug the gap between the front face and the back face of the adjacent catalyst box from above, and The second guide member is installed in such a way that the gap between the right side surface and the left side surface of the adjacent catalyst box is plugged from above.

[2] A catalytic reactor with: The reactor channel, which can make the combustion exhaust gas flow into a vertical downward flow; At least two beams, which are erected horizontally in the reactor channel; The catalyst box is formed by assembling the catalyst unit in a cuboid or cubic frame-shaped shell; The first guide member; and The second guide member, The catalyst box straddles between the two beams and is supported by the two beams. The front and back sides of the frame-shaped housing are opposed to each other, and the right side and left side of the frame-shaped housing are opposed to each other. The inner plurals are arranged side by side, Frame-shaped housing with: a first hanging metal fitting installed on the upper part of the front and/or rear, a second hanging metal fitting installed on the upper part of the rear and/or front, and installed on the right side and/or left side The gasket member, The first guide member is installed in such a way as to plug the gap between the front face and the back face of the adjacent catalyst box from above, and The second guide member is installed in such a way that the gap between the right side surface and the left side surface of the adjacent catalyst box is plugged from above.

[3] The vertical downflow catalyst reactor as described in [1] or [2], wherein the frame-shaped housing further has a sealing member installed to connect the lower part between the adjacent catalyst boxes and between the two beams To be sealed between.

[4] A catalyst box used in the catalyst reactor described in [1], It is made by assembling the catalyst unit in a rectangular or cubic frame-shaped shell. The frame-shaped housing has a stopper member attached to the upper part of the front and/or rear surface, and a gasket member attached to the right side and/or left side.

[5] The catalyst box according to [4], wherein the stopper member has a screw part.

[6] A catalyst box used in the catalyst reactor described in [2], It is made by assembling the catalyst unit in a rectangular or cubic frame-shaped shell. Frame-shaped housing with: a first hanging metal fitting installed on the upper part of the front and/or rear, a second hanging metal fitting installed on the upper part of the rear and/or front, and installed on the right side and/or left side The gasket member.

[7] The catalyst box according to [6], wherein the first hanging metal fitting has a screw part.

[8] The catalyst box according to any one of [4] to [7], wherein the frame-shaped housing further has a sealing member installed to connect the lower part between the adjacent catalyst boxes and between the two beams To be sealed between.

[9] The catalyst box according to any one of [4] to [8], wherein the frame-shaped housing further has a second guide member installed so as to plug the right side of the adjacent catalyst box from above The gap to the left side. [Effects of Invention]

The catalyst box of the present invention can be quickly arranged side by side at a predetermined interval between the inner wall of the reactor channel and the catalyst box and between the adjacent catalyst boxes. The vertical downflow catalyst reactor of the present invention can carry in and set up or even remove and carry out the catalyst box assembled with the catalyst unit in a short construction period and has an excellent function of preventing coal dust accumulation.

The embodiments of the present invention are shown based on the drawings, and the present invention will be described in detail.

The catalyst reactor of the present invention has a reactor channel 2, a beam 33, a catalyst box 20, a first guide member 31, and a second guide member 32 (refer to FIG. 9 or 10).

The reactor channel 2 has a vertical flow path that allows the combustion exhaust gas to flow vertically downward. The cross-sectional shape of the flow path of the reactor channel viewed from the gas flow direction is not particularly limited, but a rectangular shape is preferred. The size of the flow path section of the reactor channel should be almost the same from the inlet of the reactor channel to the outlet of the reactor channel. At the inlet of the reactor channel, an inlet channel is connected, which can flow the combustion exhaust gas through the exhaust channel of a combustion device such as a boiler. The inlet channel may have a horizontal flow path. A joint channel having a downward inclined flow path connecting the horizontal flow path and the vertical flow path may be provided between the inlet channel having the horizontal flow path and the reactor channel 2 having the vertical flow path. The size of the flow path section of the inlet channel and the outlet channel may be smaller, the same, or larger than the reactor channel. In the reactor channel, a device (for example, a sieve plate, a rectifying plate, etc.) for evenly flowing the combustion exhaust gas in the catalyst box 20 may be provided. In addition, a device for supplying a reducing agent such as ammonia can be installed in front of the catalyst box 20, for example, in the upper part of the reactor channel 2, the inlet channel, or the joint channel.

In the reactor channel, a beam 33 is erected horizontally. Then, as shown in Fig. 4 etc., the catalyst box 20 straddles between the two beams and is supported by the two beams. In a manner in which the faces are relatively adjacent to each other, a plurality of beams 33 are arranged side by side in the reactor channel, and the cross section of the beam 33 is usually box-shaped, H-shaped, or T-shaped. In FIG. 4, the catalyst box is erected so that the front or rear face is parallel to the beam, but it may be erected so that the right side or left side is parallel to the beam.

The catalyst box 20 is formed by assembling at least one catalyst unit 10 in a frame-shaped housing 21. Although not shown, legs are provided at the lower part of the frame-shaped unit, and the bottom surface of the catalyst unit 10 is positioned higher than the upper surface of the beam. The shape of the foot is not limited, and the lower part of the frame constituting the frame unit may be formed in a cylindrical or lattice shape. It is also possible to install a cylindrical or lattice foot member on the bottom surface of the frame unit. Can. In addition, when assembling a plurality of catalyst units side by side in a horizontal direction, it is better to set the feet below the gap between adjacent catalyst units. If such grid-shaped feet are provided, the four corners of the bottom surface of the catalyst unit can be firmly supported.

The catalyst unit 10 is, for example, a structure obtained by accommodating a contact medium 12 in a housing 13 (FIG. 1) or the contact medium 12 itself. The contact medium 12 can be in a grid shape, a honeycomb shape, a corrugated cardboard shape, a plate shape, and the like. The catalyst medium 12 used for the denitration reaction contains an active ingredient of the denitration catalyst. Examples of active components of the denitration catalyst include: titanium oxides, molybdenum and/or tungsten oxides, and vanadium-containing oxides (titanium-based catalysts); those containing Cu, Fe, etc. Metallic zeolite, etc., mainly contains aluminosilicate (zeolite-based catalyst); titanium-based catalyst and zeolite-based catalyst are mixed, etc. Among these, titanium-based catalysts are preferred. Examples of the titanium-based catalyst include Ti-VW catalyst, Ti-V-Mo catalyst, Ti-VW-Mo catalyst, and the like. The ratio of V element to Ti element, as _{the weight percentage of V 2} O ₅ /TiO ₂ , is preferably 2% by weight or less, more preferably 1% by weight or less. The ratio of Mo element and/or W element to Ti element as _{a weight percentage of (MoO 3} +WO ₃ )/TiO ₂ is preferably 10% by weight or less, more preferably 5% by weight or less. In the catalyst, as a co-catalyst or additive, it can also contain: P oxide, S oxide, Al oxide (such as alumina), Si oxide (such as glass fiber), Zr oxide (For example, zirconia), gypsum (for example, dihydrate gypsum, etc.), zeolite, etc. These can be used for catalyst preparation in the form of powder, gel, slurry, fiber, etc.

The shape of the housing 13 is not particularly limited as long as it can accommodate the contact medium 12, but it is preferably a rectangular parallelepiped or a cube as a whole. The frame body 13 has at least an inflow port and an outflow port, so that the combustion exhaust gas G can flow into and out of the area (catalyst layer) accommodating the catalyst.

The frame-shaped housing 21 is preferably a rectangular parallelepiped or cube as a whole. The frame-shaped housing has at least an inflow port and an outflow port, so that combustion exhaust gas can flow into and out of the catalyst unit. The catalyst unit is preferably integrated in the frame-shaped housing so that its inlet and outlet are on the same side as the inlet and outlet of the frame-shaped housing.

(First Embodiment) The catalyst box 20 shown in FIG. 2 or 3 has a frame-shaped housing 21 with a first hanging metal fitting 22, a second hanging metal fitting 23, a gasket member 25, and a sealing member 26 as necessary.

The first hanging metal fittings 22 and the second hanging metal fittings 23 can be hung with sling equipment (such as cables, cables, etc.) to hang the catalyst box 20 with a lifting machine or a special equipment.

In the catalyst box shown in Figure 2 or 3, the first hanging metal fittings 22 are installed on the upper part of the front face of the frame-shaped shell, and the second hanging metal fittings 23 are installed on the upper part of the rear face of the frame-like shell two.

When the catalyst box 20 is arranged such that the front and the back of the frame-shaped shell are relatively adjacent to each other, and a plurality of them are arranged side by side in the reactor channel, in order to prevent the first hanging metal fitting from conflicting with the second hanging metal fitting, the second The hanging metal fitting 23 is preferably arranged at a position not opposite to the first hanging metal fitting installed on the upper part of the front surface of the frame-shaped housing of the adjacent catalyst box. For example, as shown in Figure 2 or 3, a first hanging metal fitting can be installed on the upper part of the front surface of the frame-shaped housing near the two ends, from the two ends of the rear surface of the frame-shaped housing slightly closer to the inside. Install a second hanging metal fitting at each location. The installation of the first hanging metal fittings and the second hanging metal fittings at positions that are not opposite to each other is not limited to these examples, and may be carried out in other ways. Although not shown, it can also replace the installation method shown in Figure 2 or 3. For example, a second hanging metal fitting 23 is installed on the upper part of the rear surface of the frame-shaped housing near the two ends, respectively, from the frame-shaped housing Install a first hanging metal fitting 22 on the front two ends slightly to the inside, or at the upper part of the front face of the frame-shaped housing near the left end and slightly inside the right end from the upper part of the rear face A first hanging metal fitting 22 is installed approximately diagonally, and a first hanging metal fitting 22 is installed approximately diagonally on the upper part of the front surface of the frame-shaped housing near the right end and slightly inward from the upper left end of the rear surface. Two hanging metal fittings 23.

The shape of the first hanging metal fitting 22 and the second hanging metal fitting 23 is not particularly limited as long as the harness can be hung. For example, L-shaped hook, J-shaped hook, U-shaped hook, C-shaped hook, O-shaped ring, D-shaped ring, etc. can be cited. Preferably, the first hanging metal fitting 22 further has a screw part. The screw part can screw the first guide member described later to the first hanging metal fitting. For example, in an L-shaped hook formed by bending a flat plate, a screwed portion is provided on one of the flat plate parts, and an L-shaped hook formed by attaching the other flat part to the frame-shaped housing by welding or the like can be used as the first Hang metal fittings to use. The screw part may be provided by opening a hole at a desired location and performing threading, or by opening a hole at a desired location and welding a nut to fit the hole to install it.

On the inner wall of the reactor channel facing the front or rear of the catalyst box, a member for ensuring a gap between the front or rear of a certain catalyst box closest to the inner wall may also be installed. In addition, the aforementioned inner wall may also have a structure for installing the third guide member by screw locking, inserting, etc., and the gap between the reactor channel and the front or back of the catalyst box may be provided. Plugged. The third air guide member may have the same shape as the first air guide member or the second air guide member described later.

The first hanging metal fitting 22 and the second hanging metal fitting 23 may protrude upwards and backwards beyond the upper end of the frame-shaped housing 21, or they may not protrude. In the past, when the first hanging metal fitting and the second hanging metal fitting were installed in a protruding manner, it can be used as a guide when stacking the catalyst boxes vertically. A new catalyst box is installed in the reactor channel, and the period from when it is used up and exchanged is from several months to several years. During this period, the first hanging metal fittings and the second hanging metal fittings can effectively function in spot inspection of the catalyst box, catalyst unit, or part of the catalyst, or in the case of temporary exchange.

In the catalyst box shown in FIG. 2 or 3, the gasket member 25 is installed on the right side of the frame-shaped housing. The gasket member 25 is arranged so that the right side and the left side of the frame-shaped housing are relatively adjacent to each other. When a plurality of catalyst boxes are arranged in the reactor channel, it is secured between the right side and the left side of the frame-shaped housing. A gap of the extent of the second air guiding member described later can be inserted.

In the catalyst box shown in Fig. 2 or 3, the gasket member 25 is installed on the upper right side of the frame-shaped housing near both ends, and nothing is installed on the left side. Also, as long as a gap can be secured between the right side and the left side of the frame-shaped housing, the two gasket members are not installed on the right side of the frame-shaped housing, but two gasket members may be installed on the left side of the frame-shaped housing. Or alternatively, you can install one on the diagonal of the right side near the front side and the left side near the back side or the opposite diagonal. From the viewpoint of easy insertion of the second air guide member 32 described later, the gasket member is preferably attached to the upper side of the frame-shaped housing. When a plurality of catalyst boxes are arranged side by side in the reactor channel so that the right side and the left side of the frame-shaped shell are opposed to each other, the gasket member installed in the frame-shaped shell of one catalyst box is arranged in It is not opposite to other gasket members installed in the frame-shaped housing of other adjacent catalyst boxes, so as to avoid conflict between the two, which is preferable.

On the inner wall of the reactor channel opposite to the right side or left side of the catalyst box, a member for ensuring a gap between the left side or right side of a certain catalyst box closest to the inner wall can also be installed. In addition, the inner wall may also have a structure for installing the fourth guide member by screw locking, inserting, etc., and the gap between the reactor channel and the left side or right side of the catalyst box To be plugged. The fourth air guiding member may have the same shape as the first air guiding member or the second air guiding member described later.

In the catalyst box shown in Figure 2 or 3, the front or back is placed parallel to the beam, and the sealing member 26 is installed at the lower part (preferably the lower end) of the right side of the frame-shaped housing. When the catalyst boxes are arranged side by side in the reactor channel, the lower part of the gap existing between the front and the back is sealed by the beam. The lower part of the gap existing between the right side surface and the left side surface is sealed by the sealing member 26. Thereby, the amount of combustion exhaust gas that escapes from the gap between the catalyst boxes without passing through the catalyst layer can be reduced. In addition, as long as the gap existing between the right side and the left side of the frame-shaped housing can be sealed, the sealing member is not provided at the lower part of the right side of the frame-shaped housing, but at the lower part of the left side of the frame-shaped housing. It's also possible. The length and width of the sealing member can be set appropriately, and the separation of the combustion exhaust gas can be controlled according to the distance between adjacent beams and the gap between the right side and left side of the adjacent catalyst box. In addition, when the catalyst box faces the beam on the right side or the left side and straddles it in parallel, a sealing member can be installed at the lower part of the front or rear. The shape of the sealing member is not particularly limited as long as it can seal the combustion exhaust gas. For example, it may be a flat plate, an L-shaped plate (angle material, etc.), and the like.

The first guide member 31 is installed by screwing the first hanging metal fitting in the figure in a manner of plugging the gap between the front face and the back face of the adjacent catalyst box from above. The first air guide member is formed by the first top plate portion 34 with bolt through holes 35. The shape of the first top plate is not limited as long as the combustion exhaust gas can be bypassed and introduced to the inlet of the catalyst box. For example, it may be a flat plate as shown in FIG. 5, a mountain-shaped plate may be used, and other shapes may be used. In order to facilitate the removal of the first air guide member, a handle may be provided on the upper surface side of the first top plate portion. In addition, the direct or indirect installation of the first guide member to the catalyst box is by methods other than screwing the first hanging metal fittings, for example, by inserting (inserting) into the gap between the catalyst boxes It can be done by waiting. The installation of the first guide member is preferably carried out after the catalyst box is set at a predetermined position on the beam.

The second guide member 32 is installed by plugging the gap between the right side and the left side of the adjacent catalyst box from above by inserting it in the gap between the right side and the left side in the figure. The shape of the second guide member is not limited as long as it can bypass the combustion exhaust gas and introduce it to the inlet of the catalyst box. For example, as shown in FIG. 6, a T-shaped cross-sectional member formed by the flat second top plate portion 36 and the insertion portion 37 may also be used, or a cross-sectional umbrella-shaped member formed by the mountain-shaped second top plate portion and the insertion portion 37 Yes, other shapes are also possible. The insertion part of the second air guide member is a part that can be inserted into the gap between the right side surface and the left side surface. The insertion part is usually in the shape of a flat plate. In order to make it difficult to pull out from the gap, the insertion portion may have a corrugated shape, a hook shape, or the like. The insertion portion 37 may have a length shorter than the second top plate portion so as not to conflict with the gasket member 25, or a notch may be provided so as to avoid the gasket member. In order to facilitate the removal of the second air guide member, a handle may be provided on the upper surface side of the second top plate portion. In addition, the direct or indirect installation of the second air guide member to the catalyst box is not limited to insertion. For example, it can be appropriately performed by methods such as screw locking by screws, welding, and the like. The installation of the second guide member can be carried out before or after the catalyst box is set at a predetermined position on the beam.

When installing the first guide member and the second guide member, the end of the first guide member and the end of the second guide member may overlap. For example, if the second guide member is inserted and the end of the first guide member is overlaid on the end of the first guide member to screw the first guide member, the second guide member will be blocked by the first guide member. The components are pressed to make the installation firm.

(Second Embodiment) In the catalyst box 20a shown in FIG. 7, the frame-shaped housing 21 has a stop member 22a, a gasket member 25, and a necessary sealing member 26. In addition to its smaller size, it has the same size as the catalyst box of the first embodiment. The same structure. The stop member 22a is installed on the upper part of the front surface. The stopper member 22a has the same structure as the first hanging metal fitting 22 described above. Moreover, it is preferable that the stop member 22a has a screw part. The screw part may have the same structure as the screw part having the aforementioned first hanging metal fitting 22. Two gasket members 25 are installed on the right side. Unlike the stopper member 22a, the frame-shaped housing may further have a hanging metal fitting for hanging the catalyst box on the upper part. In addition, the direct or indirect installation of the first air guide member to the catalyst box is performed by a method other than screw-locking the stop member, for example, by inserting (inserting) into the gap between the catalyst box, etc. It's also possible. The installation of the first guide member to the catalyst box is preferably carried out after the catalyst box is installed at a predetermined position on the beam. The direct or indirect installation of the second air guide member to the catalyst box is not limited to the insertion, for example, it can be properly performed by methods such as screw locking and welding caused by screws. The installation of the second guide member to the catalyst box can be performed before or after the catalyst box is set at a predetermined position on the beam.

(Third Embodiment) The catalyst box 20b shown in Fig. 8 except that the spacer member 25 is installed in a diagonal shape on the left side near the front side and the right side side near the rear side or the opposite diagonal shape, and one of each is installed, and The stopper member 22a has the same shape as the catalyst box of the second embodiment except that the front side near the left side and the back side near the right side are diagonally or opposite to each other.的结构。 The structure.

(Fourth Embodiment) In the catalyst box 20c shown in FIG. 11, the second guide member 32, which is formed only by the second top plate portion, has the same structure as that shown in FIG. The catalyst box shown has the same structure. When the catalyst box 20c is arranged as shown in FIG. 12, the second guide member 32 can block the gap between the right side surface and the left side surface of the adjacent catalyst box from above. In addition, the second guide member 32 may not be installed on the upper part (preferably the upper end) of the left side of the frame-shaped housing, but may be installed on the upper part (preferably the upper end) of the right side of the frame-shaped housing. In addition, the attachment of the second air guide member to the catalyst box can be performed by any method such as screw locking, welding, and inserting.

(Other embodiments) Part of the catalyst box to which the present invention is applied can also be used. Moreover, a part of the catalyst box of the catalyst reactor constructed by the prior art may be substituted for the catalyst box of the invention.

1: entrance channel 2: reactor channel 3: Exit channel 4: Connector channel G: Combustion exhaust before denitration G': Combustion exhaust gas after denitration 33: beam 10: Catalyst unit 12: Touch the media 13: Frame 20: Catalyst box 21: Frame-shaped shell 22: The first hanging metal fittings (both have the function of a stop member) 22a: Stop member 23: The second hanging metal fittings 24: Screw part 25: Gasket member 26: Sealing member 31: The first diversion member 34: The first top plate part 35: Hole for bolt fixing 32: The second diversion member 36: The second top plate part 37: Insertion part

[Fig. 1] A perspective view showing an example of a catalyst unit. [Fig. 2] A perspective view showing an example of the process of assembling the catalyst unit in the frame-shaped housing to manufacture the catalyst box. [Fig. 3] A perspective view showing an example of a catalyst box. [Fig. 4] A perspective view showing an example of the process of assembling the catalyst box, the first air guide member, and the second air guide member to manufacture a catalyst reactor. [Fig. 5] A perspective view showing an example of the first air guiding member. [Fig. 6] A perspective view showing an example of a second air guide member. [Fig. 7] A perspective view showing another example of the catalyst box. [Fig. 8] A perspective view showing another example of the catalyst box. [Fig. 9] A side view showing an example of the structure in the reactor. [Fig. 10] A front view showing an example of the structure in the reactor. [Fig. 11] A perspective view showing another example of the catalyst box. [Fig. 12] A diagram showing an example of the process of manufacturing a catalytic reactor.

10: Catalyst unit

21: Frame-shaped shell

22: The first hanging metal fittings (both have the function of a stop member)

23: The second hanging metal fittings

24: Screw part

25: Gasket member

26: Sealing member

Claims (9)

A catalytic reactor with: The reactor channel, which can make the combustion exhaust gas flow into a vertical downward flow; At least two beams, which are erected horizontally in the reactor channel; The catalyst box is formed by assembling the catalyst unit in a cuboid or cubic frame-shaped shell; The first guide member; and The second guide member, The catalyst box straddles between the two beams and is supported by the two beams. The front and back sides of the frame-shaped housing are opposed to each other, and the right side and left side of the frame-shaped housing are opposed to each other. The inner plurals are arranged side by side, The frame-shaped housing has: a stopper member installed on the upper part of the front and/or rear side, and a gasket member installed on the right side and/or left side, The first guide member is installed in such a way as to plug the gap between the front face and the back face of the adjacent catalyst box from above, and The second guide member is installed in such a way that the gap between the right side surface and the left side surface of the adjacent catalyst box is plugged from above. A catalytic reactor with: The reactor channel, which can make the combustion exhaust gas flow into a vertical downward flow; At least two beams, which are erected horizontally in the reactor channel; The catalyst box is formed by assembling the catalyst unit in a cuboid or cubic frame-shaped shell; The first guide member; and The second guide member, The catalyst box straddles between the two beams and is supported by the two beams. The front and back sides of the frame-shaped housing are opposed to each other, and the right side and left side of the frame-shaped housing are opposed to each other. The inner plurals are arranged side by side, Frame-shaped housing with: a first hanging metal fitting installed on the upper part of the front and/or rear, a second hanging metal fitting installed on the upper part of the rear and/or front, and installed on the right side and/or left side The gasket member, The first guide member is installed in such a way as to plug the gap between the front face and the back face of the adjacent catalyst box from above, and The second guide member is installed in such a way that the gap between the right side surface and the left side surface of the adjacent catalyst box is plugged from above. The catalyst reactor according to claim 1 or 2, wherein the frame-shaped housing further has a sealing member installed to seal the lower part between the adjacent catalyst boxes and between the two beams. A catalyst box used in the catalyst reactor described in claim 1, It is made by assembling the catalyst unit in a rectangular or cubic frame-shaped shell. The frame-shaped housing has a stopper member attached to the upper part of the front and/or rear surface, and a gasket member attached to the right side and/or left side. The catalyst box according to claim 4, wherein the stop member has a screw part. A catalyst box used in the catalyst reactor described in claim 2, It is made by assembling the catalyst unit in a rectangular or cubic frame-shaped shell. Frame-shaped housing with: a first hanging metal fitting installed on the upper part of the front and/or rear, a second hanging metal fitting installed on the upper part of the rear and/or front, and installed on the right side and/or left side The gasket member. The catalyst box according to claim 6, wherein the first hanging metal fitting has a screw part. The catalyst box according to any one of claims 4 to 7, wherein the frame-shaped housing further has a sealing member installed to seal the lower part between the adjacent catalyst boxes and between the two beams. The catalyst box according to any one of claims 4 to 7, wherein the frame-shaped housing further has a second guide member installed so as to plug between the right side and the left side of the adjacent catalyst box from above Clearance.

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