JP2011220172A - Catalytic reactor for ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catalytic reactor of high operation efficiency with a reduced cost of parts capable of certainly fixing a cassette with respect to vibration from engines or the ship body at the time of navigation.SOLUTION: A cassette 3 comprises a first fitting member 17 and a second fitting member 18. A case body and a lid body constituting a device case respectively have a first member to be fitted and a second member to be fitted. If the cassette 3 is inserted from an opening part of the case body, the first fitting member 17 is held between the first member to be fitted and a shelf board constituting the case body. If the opening part is closed with the lid body after insertion of the cassette 3, the second fitting member 18 is held between the second member to be fitted and the shelf board of the case body. Thus, a main fitting and holding structure is provided.

Description

  The present invention relates to a catalytic reaction apparatus for a ship which is provided in a ship equipped with a diesel engine and reduces and removes nitrogen oxides in exhaust gas with a catalyst, and more particularly, a cassette type container (hereinafter simply referred to as “cassette”) containing a catalyst. Is attached to the catalytic reaction device.

  Conventionally, in a ship equipped with a diesel engine, in order to reduce and remove nitrogen oxides in exhaust gas, ammonia is injected into the exhaust gas and then passed through a catalytic reaction apparatus in which a catalyst is arranged. A selective catalytic reduction method, that is, a so-called SCR method, is applied to reduce oxides to nitrogen and water.

  The catalyst is a titanium-vanadium ceramic or the like formed into a honeycomb shape or a plate shape. Such a catalyst is suitable for use in an apparatus case through which exhaust gas passes in a catalytic reaction apparatus. A technique for bringing the catalyst into contact with the exhaust gas by arranging is known (for example, see Patent Document 1). In this technique, a plurality of catalysts in a single stage are stacked in an apparatus case, and a large number of catalysts are installed in the apparatus so that both ends and side surfaces in the longitudinal direction of each catalyst are in contact with a support grid provided around the catalyst. Located in the case.

  However, with this technology, most of the catalyst is in an exposed state, so that the catalyst is moved to the adjacent catalyst and surrounding members by the impact of handling during loading and unloading and vibrations from the engines and hulls during navigation. In some cases, it crashed and was damaged. Furthermore, since the catalyst is mounted in the apparatus case in a highly stacked state, the lower catalyst is more susceptible to crushing by the load of the upper catalyst, and the lower catalyst removes the upper catalyst. However, maintenance was not good.

  Therefore, by storing the catalyst in a cassette formed so as to be closed with stainless steel etc. other than the exhaust gas inlet / outlet, and placing the cassette on a shelf provided in the case body of the device case Protecting each catalyst from damage and improving maintainability has been performed.

JP-A-7-139341

  However, when a cassette containing a catalyst is placed on a shelf, the protection and maintainability of each catalyst are certainly improved, but the cassette is fixed only by the frictional force due to the weight of the cassette containing the catalyst. If the vibrations from the engines and the hull during navigation are large, the cassette easily slides on the shelf and moves. Then, the exhaust gas inlet / outlet provided in the cassette is disconnected from the exhaust gas exhaust path in the apparatus case, and the exhaust gas leaks to the outside of the cassette, or the exhaust gas inlet / outlet in the cassette. May be partially blocked by the device case, preventing the exhaust gas from being sealed and breathable, resulting in insufficient contact between the exhaust gas and the catalyst, and reducing and removing nitrogen oxides in the exhaust gas efficiently. There was a problem that it was not possible.

In addition, if the vibration from the engine or hull during navigation is extremely large, the cassette slides on the shelf at a high speed and collides with adjacent cassettes and surrounding members, causing damage to the catalyst in the cassette. There was a problem that the effectiveness of catalyst protection could not be sufficiently secured.
In either case, there is a problem that a large noise is generated by the movement or collision of the cassette.

  In addition, it is conceivable to use a fastening force using a fastening body such as a bolt and a nut in addition to the frictional force due to its own weight as described above. Since it is in a very severe corrosive environment, it is necessary to use an expensive member having high strength and excellent corrosion resistance for the fastening body, and there is a problem that an increase in the cost of parts is inevitable.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
That is, according to claim 1, in a catalytic reaction apparatus for a ship for purifying exhaust gas by detachably mounting a cassette containing a catalyst in an apparatus case through which exhaust gas passes, the first fitting body is attached to the cassette. And a second fitting body, and a case main body and a lid body constituting the device case are provided with a first fitted body and a second fitted body, respectively, and the cassette is loaded from the opening of the case main body. Then, the first fitting body is sandwiched between the first fitting body and the case main body, and after the cassette is inserted, the opening is closed with a lid, and then the second fitting body becomes the second fitting body and the case. A fitting and clamping structure that is clamped with the main body is provided.
According to a second aspect of the present invention, the first fitting body includes a first inclined portion that is inclined so as to approach the case main body as the first fitting body is closer to the first fitting body. A first opposing inclined portion that is opposed to the first inclined portion and is inclined in the same inclination direction is formed, and the second fitting body is inclined so that the closer to the second fitted body, the closer to the case body side. Two inclined portions are formed, and a second opposing inclined portion that is opposed to the second inclined portion and is inclined in the same inclination direction is formed on the second fitted body.

Since this invention was comprised as mentioned above, there exists an effect shown below.
That is, according to the first aspect, the cassette can be securely fixed in the apparatus case, and the cassette does not slide on the case main body even if there is a large vibration from the engines or the hull during navigation. Ensuring gas sealing and air permeability, ensuring sufficient contact with the catalyst, reducing and removing nitrogen oxides in the exhaust gas efficiently, and causing the cassette to collide with adjacent cassettes and break. Therefore, the effectiveness of catalyst protection can be sufficiently secured. And the noise accompanying a movement and a collision of a cassette can also be prevented. In addition, since a fitting body is used, a fastening body such as a bolt and a nut made of an expensive member that can withstand a severe corrosive environment becomes unnecessary, and the cost of parts can be reduced. In addition, the cassette can be installed simply by closing the opening of the case body with the lid after loading the cassette, and the closing operation of the opening can be combined with the clamping operation of the second fitting body to improve the efficiency of the cassette installation work. Can greatly improve.
According to claim 2, when the cassette is inserted into the apparatus case, the first fitting body is inserted into the first fitting body and the case main body while the first inclined portion is along the first opposing inclined portion. Then, it is gradually pressed against the case body and held in a pressed state. Similarly, when the lid is closed after the cassette is inserted, the second fitting body is placed on the second fitting body so that the second opposing inclined portion runs on the second fitting body along the second inclined portion. The unity is gradually pressed against the case body and held in a pressed state. Therefore, the cassette can be pressed and held against the case body side via the first fitting body and the second fitting body, and the cassette can be more securely fixed in the apparatus case, and between the cassette and the case body. The sealing performance can be improved.

It is a front view which shows the whole structure of the catalyst reaction apparatus for ships in connection with this invention. It is a side view similarly. It is also a plan view. It is a perspective view of a cassette. FIG. 5A is a general view of a cassette, FIG. 5A is a side view of the cassette, and FIG. 5B is a plan view of the cassette. FIG. 6A is a general view of a lid, FIG. 6A is a side view of the lid, and FIG. 6B is a front view of the lid. It is a side view of the 1st to-be-fitted part periphery. It is side surface partial sectional drawing of the cassette periphery in a mounting state. 9A is a partial cross-sectional side view of the periphery of the cassette showing a cassette mounting process, FIG. 9A is a partial cross-sectional side view of the periphery of the cassette before fitting, and FIG. 9B is a first fitting and holding structure; FIG. 9C is a partial cross-sectional side view of the periphery of the cassette during formation of the second fitting / holding structure. It is a front view of a cassette periphery periphery which shows a right-and-left partition structure. It is a front view of the cassette periphery periphery which shows the left-right partition structure of another form.

Hereinafter, embodiments of the present invention will be described in detail.
In addition, the direction shown by the arrow F, the direction shown by the arrow L, and the direction shown by the arrow U in the figure are the forward direction, the left direction, and the upward direction of the catalytic reaction apparatus 1, respectively. Will be explained.

First, the overall configuration of the catalytic reaction apparatus 1 according to the present invention will be described with reference to FIGS.
The catalytic reaction apparatus 1 is disposed in an exhaust gas discharge path of a ship equipped with a diesel engine, and has an apparatus case 2 in which an exhaust gas exhaust passage is provided, and is detachable in the apparatus case 2. And a cassette 3 to be mounted. Further, the device case 2 includes a case main body 4 and a lid 5 for closing the opening 9 for inserting the cassette 3 into the case main body 4.

  In the case body 4, a cylindrical body 10 is erected in a square pipe shape having an outlet 8 and an inlet 7 on the upper and lower surfaces, respectively, so that exhaust gas flows from the lower side to the upper side in the cylindrical body 10. ing. The left and right side surfaces and the rear surface of the cylindrical body 10 are entirely covered with an outer wall. However, a plurality of (in this embodiment, five stages) openings are provided in the outer wall on the front surface of the cylindrical body 10 in the vertical direction. 9 is formed, and the cassette 3 is inserted from each opening 9.

  In the cylindrical body 10, in the vicinity of the lower edge of each opening 9, a shelf plate 11 for horizontally mounting and supporting the cassette 3 is horizontally provided, and the shelf plate 11 has a rectangular ventilation hole 11 a opened. The exhaust gas flowing in from the inlet 7 can pass through the cassette 3 from the vent 11a.

  The left and right sides of the lower portion of the cylindrical body 10 are respectively connected to the left leg 12L formed by connecting the lower ends of the front and rear leg plates 12La and 12La with the bottom plate 12Lb, and the lower ends of the front and rear leg plates 12Ra and 12Ra are connected to the bottom plate 12Rb. The right leg 12R is fixed, and the legs 12L and 12R stand the catalyst reaction apparatus 1 in a stable state on the ship.

  In the configuration as described above, when the cassette 3 is inserted from the opening 9 of the case body 4 onto the shelf plate 11 and then the opening 9 is closed by the lid body 5, a main fitting sandwiching structure 16 described later. Thus, the cassette 3 is fixed in the apparatus case 2. When the catalytic reactor 1 is in operation, the exhaust gas flowing from the inlet 7 passes through the cassette 3 from the vent 11a of each shelf plate 11 and comes into contact with a later-described catalyst 6 accommodated in the cassette 3. Nitrogen oxide is reduced and removed.

Next, the detailed configuration of the cassette 3, the lid 5 and the rear portion of the shelf board 11 and the main fitting / holding structure 16 according to the present invention will be described with reference to FIGS.
As shown in FIGS. 3 to 5, in the cassette 3, the left and right side plates 13, 13 standing opposite to each other in the left-right direction, the front and rear side plates 14, 14 facing each other in the front-rear direction, and the side plate 14 A rectangular tube-shaped body portion 3a formed by four catalyst fixing holes 19 communicating in the vertical direction is formed by the partition plates 15, 15, and 15 that divide 14 and divide into four equal parts in the front-rear direction. . Then, by inserting the honeycomb-shaped catalyst 6 into the catalyst fixing hole 19, the cassette 3 containing four catalysts 6 is formed.

  The left and right side plates 13 and 13, the front and rear side plates 14 and 14, and the partition plates 15, 15, and 15 are arranged so that all lower edges are on the same horizontal plane, The lower edges of 3a are aligned so that the cassette 3 can smoothly slide on the shelf 11 to a predetermined position without rattling.

  Furthermore, four vent holes 11a in the shelf plate 11 are opened in four rows in the left-right direction with four per row, and the four catalyst fixing holes 19 of the cassette 3 are formed in the four vent holes 11a in each row. They are arranged so as to be substantially coincident with each other so that the rise of the exhaust gas is not inhibited by the body portion 3a.

  On the upper part of the outer surface of the side plates 14 and 14 in the trunk portion 3a, front and rear handles 3b and 3b having a U-shape in plan view are arranged and fixed with their open portions facing inward. By gripping the handles 3b and 3b, the cassette 3 can be easily lifted up to the height of the opening 9, and the workability of carrying the cassette 3 onto the shelf board 11 can be improved. In this embodiment, four rows of cassettes 3 containing four catalysts 6 are arranged on the shelf plate 11 in the left-right direction, but the same cassettes 3 may be arranged in three rows in the left-right direction. The number of the catalyst 6 put in each cassette 3 and the number of rows of the cassette 3 can be changed according to the specification, and are not particularly limited.

  And the square fitting-like 1st fitting body 17 and the 2nd fitting body 18 are laterally installed in the lower part of the outer surface of the said side plates 14 * 14. Among these, the first fitting body 17 provided laterally on the rear side plate 14 is formed with a first inclined portion 17a inclined rearward and obliquely downward from the horizontal upper surface 17b to the vertical rear surface 17c. 14 is also formed with a second inclined portion 18a inclined obliquely downward and forward from the horizontal upper surface 18b to the vertical front surface 18c.

  The lower surface 17d of the first fitting body 17 and the lower surface 18d of the second fitting body 18 are both the left and right side plates 13, 13, the front and rear side plates 14, 14, and the lower edges of the partition plates 15, 15, 15. The first fitting body 17 and the second fitting body 18 are sandwiched between the shelf board 11 by a first fitting body 20 and a second fitting body 21 described later. In doing so, stress concentrates on the corners of the base portions of the first fitting body 17 and the second fitting body 18 so as not to be broken.

  As shown in FIGS. 6 and 8, the lid 5 has a rectangular plate-like cover 22 having a larger area than the opening 9 and a U-shape in a side view fixed to the front surface of the cover 22. It is formed from a pair of left and right handles 23 and 23. A plurality of fastening holes 22 a are perforated on the outer peripheral edge of the cover 22, and the cover 22 is lifted by gripping the grips 23, 23, and then the cover 22 is applied to the peripheral edge of the opening 9. In the state of contact, a bolt 25 is screwed into the fastening hole 22a, and the lid 5 is fastened and fixed so that the opening 9 can be closed.

  Furthermore, a rectangular bar-like second fitted body 21 that is fitted to the second fitting body 18 is provided in the lower part of the rear surface of the cover 22, and the second fitted body 21 includes a horizontal lower surface 21 d. A second opposing inclined portion 21a inclined obliquely upward and rearward from the vertical rear surface 21c is formed, and an intermediate pad 24 for shock absorption is attached to the second opposing inclined portion 21a. The second inclined portion 18 a of the second fitting body 18 is pressed by the second opposing inclined portion 21 a of the second fitted body 21.

  Further, as shown in FIGS. 3 and 7, a rectangular rod-like first fitted body 20 that fits with the first fitting body 17 is provided laterally near the inner wall of the cylindrical body 10 at the rear portion of the shelf plate 11. Is done. Unlike the second fitted body 21, the first fitted body 20 is provided for each row of the vent holes 11 a. The first fitted body 20 is fastened and fixed to the shelf plate 11 by screwing bolts 26 from above. The first member to be fitted 20 may be fixed by welding or fitting such as spot welding or arc welding instead of fastening by such a bolt 26, and the fixing method is the first to-be-fitted body 20. If it can fix to the shelf board 11 reliably, it will not specifically limit.

  The first fitted body 20 is formed with a first opposed inclined portion 20a inclined obliquely upward and forward from the horizontal lower surface 20d to the vertical front surface 20c, and the first opposed inclined portion 20a forms the first fitted body. The first inclined portion 17a of 17 is pressed.

  In the mounting structure as described above, as shown in FIG. 8, the first fitting body 17 is sandwiched between the first body to be fitted 20 and the shelf plate 11 of the case body 4, and the first fitting sandwiching structure 16a. The second fitting body 18 is sandwiched between the second fitted body 21 and the shelf plate 11 to form a second fitting sandwiching structure 16b, and the second fitting sandwiching structure 16b and the first The main fitting / holding structure 16 according to the present invention is constituted by the one fitting / holding structure 16a.

Next, the mounting process of the cassette 3 by the main fitting / holding structure 16 will be described with reference to FIG.
As shown in FIG. 9A, after the cassette 3 is inserted into the internal space of the device case 2 through the opening 9 and placed on the shelf board 11, the cassette 3 is pushed backward to move the shelf board 11 to the shelf board 11. Slide on the top.

  Then, as shown in FIG. 9 (b), the rear portion of the first fitting body 17 of the cassette 3 sinks into the front lower space of the first fitted body 20 by the backward pushing force 27, and the first fitting body 17 The first fitted body 20 is fitted.

  At this time, the first inclined portion 17a of the first fitting body 17 that moves horizontally rearward slides along the first opposing inclined portion 20a that faces the first inclined portion 17a and is inclined in the same inclined direction. The reaction force 28 received from the first opposing inclined portion 20a acts as a pressing force on the first fitting body 17, and the first fitting body 17 is between the first fitted body 20 and the shelf board 11. It is pinched. Thereby, the first fitting and clamping structure 16a is formed.

  Subsequently, as shown in FIG. 9C, after the first fitting body 17 and the first fitting body 20 are fitted, the grips 23 and 23 are held and the cover 22 of the lid 5 is opened. 9, the bolt 25 is screwed into the fastening hole 22 a of the cover 22 as described above, and the lid 5 is fastened and fixed to the peripheral edge of the opening 9. Then, the rear part of the second fitted body 21 of the lid 5 rides on the second fitted body 18, and the second fitted body 18 and the second fitted body 21 are fitted.

  At this time, the second opposing inclined portion 21a of the second fitted body 21 moving in the horizontal direction slides along the second inclined portion 18a that faces the second opposing inclined portion 21a and is inclined in the same inclined direction. Therefore, the reaction force 29 received from the second opposing inclined portion 21a acts as a pressing force on the second fitting body 18 via the intermediate pad 24, and the second fitting body 18 is the second fitting body. 21 and the shelf board 11. Thereby, the second fitting and clamping structure 16b is formed.

  Thus, since the downward pressing force acts on the first fitting body 17 and the second fitting body 18, the side plates 13, 13, the side plates 14, 14, and the partition plates 15, 15, 15 are provided. The trunk | drum 3a is pressed below and comes to closely_contact | adhere with respect to the shelf board 11, and between the 1st fitting body 17 and the 1st to-be-fitted body 20, and the 2nd fitting body 18 and the 2nd to-be-fitted body 21. As well as between the two, the sealing performance between the periphery of the lower surface of the cassette 3 and the upper surface of the shelf 11 can be improved. Thereby, the exhaust gas efficiently contacts the catalyst 6 in the cassette 3 without leaking in the middle.

  Furthermore, since the cassette 3 is light, when the pushing force 27 is unloaded after the first fitting body 17 and the first fitting body 20 are fitted, the elasticity of the first fitting body 17 and the first fitting body 20 is obtained. Even when the cassette 3 is pushed forward by force and the reaction force 28 decreases, the reaction force 28 is increased again by ensuring a sufficient length in the front-rear direction of the second fitted body 21. Can do. That is, when the lid 5 is fastened and fixed to the opening 9, the cassette 3 is pushed backward by the rear end of the sufficiently long second fitting body 21 provided in the lid 5, and the pushing force at this time This is because the first fitting body 17 and the first fitted body 20 are strongly fitted to each other so that a sufficient reaction force 28 is obtained.

  In addition, all of said 1st inclination part 17a, 2nd inclination part 18a, 1st opposing inclination part 20a, and 2nd opposing inclination part 21a may be horizontal. In this case, since the reaction forces 28 and 29 as described above are not generated, the pressing force does not act on the first fitting body 17 and the second fitting body 18, but the fitting bodies 17 and 18 and the fitted body 20. 21 can be easily processed, and the component cost can be reduced.

  That is, in the catalyst reaction apparatus 1 for a ship for purifying the exhaust gas by detachably mounting the cassette 3 containing the catalyst 6 in the apparatus case 2 through which the exhaust gas passes, the first fitting body 17 is attached to the cassette 3. And the second fitting body 18, the case body 4 and the lid body 5 constituting the device case 2 are respectively provided with a first fitted body 20 and a second fitted body 21, and the cassette 3 is placed in the case. When inserted from the opening 9 of the main body 4, the first fitting body 17 is sandwiched between the first fitted body 20 and the shelf plate 11 constituting the case main body 4, and the opening 9 is inserted after the cassette is inserted. When the lid 5 is closed, the main fitting / holding structure 16, which is a fitting / holding structure in which the second fitting body 18 is sandwiched between the second fitted body 21 and the shelf plate 11 of the case body 4, is provided. Therefore, securely fix the cassette 3 in the device case 2 The cassette 3 does not slide and move on the shelf 11 of the case body 4 even when vibrations from the engines and the hull during navigation are large, and the exhaust gas sealing performance and air permeability are ensured. The contact with the catalyst 6 is sufficient, nitrogen oxides in the exhaust gas can be efficiently reduced and removed, and the cassette 3 does not collide with the adjacent cassette 3 etc. Sex can be sufficiently secured. And the noise accompanying the movement and collision of the cassette 3 can also be prevented. In addition, since a fitting body is used, a fastening body such as a bolt and a nut made of an expensive member that can withstand a severe corrosive environment becomes unnecessary, and the cost of parts can be reduced. Further, after the cassette 3 is inserted, the cassette 3 can be completely mounted by simply closing the opening 9 of the case body 4 with the lid 5, and the closing operation of the opening 9 is combined with the clamping operation of the second fitting body 18. The efficiency of cassette mounting work can be greatly improved.

  Further, the first fitting body 17 is formed with a first inclined portion 17a that is inclined so as to be closer to the shelf 11 side of the case body as the first fitting body 20 is closer. Is formed with a first opposing inclined portion 20a that is opposed to the first inclined portion 17a and is inclined in the same inclination direction, and the second fitting body 18 has a case body closer to the second fitted body 21. A second inclined portion 18a that is inclined so as to approach the shelf plate 11 side is formed, and a second opposing inclination that is opposed to the second inclined portion 18a and inclined in the same inclination direction is formed on the second fitted body 21. Since the portion 21a is formed, when the cassette 3 is inserted into the apparatus case 2, the first fitting body 17 has the first inclined body 17 and the case while the first inclined section 17a is along the first opposing inclined section 20a. Dive into the shelf 11 of the main body 4 and gradually Is held in a pressed state is pressed against the shelf plate 11 side of the over scan body. Similarly, when the cover 3 is closed after the cassette 3 is inserted, the second fitted body 21 is arranged so that the second opposed inclined portion 21a rides on the second fitted body 18 along the second inclined portion 18a. Then, the second fitting body 18 is gradually pressed against the shelf plate 11 side of the case body 4 and held in a pressed state. Therefore, the cassette 3 can be pressed and held against the shelf plate 11 side of the case body 4 via the first fitting body 17 and the second fitting body 18, and the cassette 3 can be more securely fixed in the apparatus case 2. In addition, the sealing performance between the cassette 3 and the shelf plate 11 of the case body 4 can be improved.

Next, the left and right partition configuration of the cassette 3 will be described with reference to FIGS. 1, 8, 10, and 11.
As shown in FIGS. 1, 8, and 10, four cassettes 3 are juxtaposed in the left-right direction for each stage, and the adjacent cassette 3 is placed on the shelf plate 11 on which the cassette 3 is placed and supported. Five pins 30 are planted at substantially equal intervals in the front-rear direction at a substantially central position in the left-right direction.

  The pins 30 are disposed in the vicinity of the front and rear side plates 14 and 14 and the partition plates 15, 15, and 15 constituting the cassette 3, and the upper half of the pins 30 protrudes from the upper surface of the shelf plate 11. . As a result, when the cassette 3 is slid backward after being placed on the shelf 11 from the opening 9, the cassette 3 is guided to the pin 30, and the fitting position with the first fitted body 20 is small. It can be moved by shaking, the positioning accuracy to the fitting position can be improved, and the positional deviation between the catalyst 6 in the cassette 3 and the vent 11a of the shelf board 11 can be prevented.

Moreover, the left-right partition structure of another form is demonstrated.
As shown in FIG. 11, in the cassette 3 </ b> A, a rectangular bar-shaped third fitting body 31 and a third covering body fitted to the third fitting body 31 are disposed at lower portions of the outer side surfaces of the left and right side plates 13 and 13. The fitting body 32 extends in the front-rear direction. And the 3rd inclination part 31a inclined to the right diagonally downward is formed in the upper part of the 3rd fitting body 31 among these, and the lower surface 31d of the 3rd fitting body 31 is the said left-and-right side plates 13 and 13, It arrange | positions so that it may become on the same horizontal surface as the lower edge of front-and-back side plates 14 and 14 and the partition plates 15 and 15. On the other hand, a third opposed inclined portion 32a that is opposed to the third inclined portion 31a and is inclined in the same inclined direction is also formed in the lower portion of the third fitted body 32.

  In such a configuration, when the cassette 3A is inserted from the opening 9 and placed on the shelf plate 11, the third fitting body 31 is connected to the third inclined portion 31a and the second inclined portion 31a between the adjacent cassettes 3A. A sub-fitting sandwiching structure 33 that is sandwiched between the third fitted body 32 and the shelf board 11 is configured via the three opposing inclined portions 32a. Due to the sub-fitting clamping structure 33, the third fitted body 32 of the left side plate 13 of the cassette 3A is connected to the third fitted body of the adjacent cassette 3A via the third opposed inclined portion 32a and the third inclined portion 31a. On the other hand, the third fitting body 31 of the right side plate 13 rides on the third fitting body 32 and the shelf board 11 of the adjacent cassette 3A via the third inclined portion 31a and the third opposing inclined portion 32a. It is sandwiched between.

  When the cassette 3A is slid rearward in this state, the cassette 3A is guided between the third fitting body 31 and the third fitting body 32 that extend in parallel in the front-rear direction to the adjacent cassette 3A. The position of the catalyst 6 in the cassette 3A and the shelf plate 11 can be further improved by moving to the fitting position with the first fitted body 20 with little displacement. It is possible to reliably prevent displacement from the vent 11a.

  That is, a plurality of the cassettes 3A are arranged in parallel to the loading direction of the cassette 3A, and a third fitting body 31 is provided on one of the opposing surfaces of the adjacent cassette 3A, and a third fitting body 32 is provided on the other. Provided, and when the cassette 3A is inserted into the shelf plate 11 of the case body 4, the third fitting body 31 has a fitting and holding structure in which the third fitting body 31 is sandwiched between the third fitted body 32 and the shelf plate 11. Since the clamping structure 33 is provided, the cassette 3A is guided between the third fitting body 31 and the third fitting body 32 when the cassette 3A is moved to the fitting position with the first fitting body 20. , And can be moved to the fitting position with high accuracy, and the displacement between the catalyst 6 in the cassette 3A and the vent 11a of the shelf 11 can be reliably prevented, and the catalyst 6 and the exhaust gas can be sufficiently contacted. To reduce nitrogen oxides in exhaust gas more efficiently. It can be. Both the pin 30 and the sub-fitting clamping structure 33 function as a regulating material when the cassettes 3 and 3A move greatly in the left-right direction due to severe vibration from the engines and the hull during navigation. The collision between the cassettes 3 and 3A can be prevented.

  INDUSTRIAL APPLICABILITY The present invention can be applied to all ship catalytic reaction apparatuses that purify exhaust gas by detachably mounting a cassette containing a catalyst in an apparatus case through which exhaust gas passes.

DESCRIPTION OF SYMBOLS 1 Catalytic reactor 2 Apparatus case 3.3A Cassette 4 Case main body 5 Lid 6 Catalyst 9 Opening 11 Shelf board (case main body)
16 Main fitting clamping structure (fitting clamping structure)
17 1st fitting body 17a 1st inclination part 18 2nd fitting body 18a 2nd inclination part 20 1st to-be-fitted body 20a 1st opposing inclination part 21 2nd to-be-attached body 21a 2nd opposing inclination part

Claims (2)

  In a catalytic reaction apparatus for a ship for purifying exhaust gas by detachably mounting a cassette containing a catalyst in an apparatus case through which exhaust gas passes, the cassette includes a first fitting body and a second fitting body. In addition, the case main body and the lid body constituting the device case are each provided with a first fitted body and a second fitted body, and when the cassette is inserted from the opening of the case main body, the first fitted body is When sandwiched between the first fitted body and the case main body and the opening is closed with a lid after inserting the cassette, the second fitted body is sandwiched between the second fitted body and the case main body. A marine catalytic reaction device provided with a fitting and clamping structure.   The first fitting body is formed with a first inclined portion that is inclined so as to be closer to the case main body as the first fitting body is closer to the first fitting body, and the first fitting body is opposed to the first inclined portion. In addition, a first opposing inclined portion that is inclined in the same inclination direction is formed, and a second inclined portion that is inclined so as to approach the case body side as the second fitted body is closer to the second fitted body. The ship's catalytic reaction device according to claim 1, wherein the second fitted body is formed with a second opposing inclined portion that faces the second inclined portion and is inclined in the same inclination direction. .

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