Engine exhaust hydrocarbon compound treatment device packaging structure

Abstract

The utility model belongs to tail gas post -treatment equipment technical field discloses a kind of engine tail gas hydrocarbon compound processing equipment packaging structure, including shell assembly, catalyst component and support component, shell assembly is the cylinder of two ends opening, forms the airflow passage of one end into another end, several catalyst components are arranged in shell assembly along the airflow flow direction interval, support component includes bottom support frame, top bracket, front and rear bracket, fixed frame, movable frame, movable bracket and positioning compression tube.The utility model effectively improves the installation reliability, sealing, maintainability and structural adaptability of catalyst component.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas aftertreatment equipment, and in particular to a packaging structure for an engine exhaust hydrocarbon compound treatment device. Background Technology

[0002] Most existing aircraft engines use aviation kerosene, which, when incompletely combusted, produces a certain amount of hydrocarbon pollutants. This is especially true during takeoff and landing, when even more hydrocarbon pollutants are generated, polluting the surrounding environment, producing odors, and affecting the living environment of residents. During takeoff, the catalyst activity is affected because the temperature has not yet reached a certain level. Combined with the large amount of unburned hydrocarbons during cold starts, the odor is particularly strong. Furthermore, the exhaust gas introduces moisture during the warming process. The combined effect of moisture and temperature affects the catalytic activity during warming, causing catalyst activity to agglomerate towards the center, reducing catalytic oxidation efficiency and increasing hydrocarbon emissions.

[0003] Catalysts for the catalytic decomposition of these hydrocarbon compounds are typically encapsulated in catalyst assemblies, which must be removable for replacement. Catalyst assemblies are mostly ceramic components, which are fragile; therefore, the encapsulation scheme of the catalyst assembly within the reaction apparatus is particularly important.

[0004] There are many methods for encapsulating catalyst components, and the encapsulation effects vary. Currently, multiple catalyst groups are often stacked together. However, stacking multiple catalyst groups results in a large size, and the large number makes sealing difficult, leading to insufficient reaction between the catalyst and the exhaust gas, thus reducing reaction efficiency. Catalyst stacking is often done as a single unit, requiring high catalyst strength and making catalyst repositioning difficult. Some manufacturers replace and maintain multiple catalyst groups through front or rear doors, but with a large number of catalyst groups, the limited internal space makes it impossible to adjust the catalyst position. Other manufacturers use a grouped approach for the catalyst and its fixing frame, which provides a tight seal and convenient position adjustment and maintenance, but uses more profiles, increasing manufacturing costs. Still other manufacturers' encapsulation structures are only suitable for single horizontal or vertical installation methods, limiting the application range. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a packaging structure for an engine exhaust hydrocarbon compound treatment device, which solves the problems of difficult catalyst stacking and sealing, insufficient maintenance space, single installation method, and limited application in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An encapsulation structure for an engine exhaust hydrocarbon compound treatment device includes a housing assembly, a catalyst assembly, and a support assembly. The housing assembly is a cylindrical shape with openings at both ends, forming an airflow channel with one end in and the other end out. Several catalyst assemblies are arranged at intervals within the housing assembly along the airflow direction. The support assembly includes a bottom support frame, a top support frame, front and rear supports, a fixed frame, a movable frame, a movable support, and a positioning and clamping tube. The bottom support frame, top support frame, front and rear supports, and fixed frame are welded to the inner wall of the housing assembly according to the arrangement position of each catalyst assembly. The bottom of the catalyst assembly rests on the bottom support frame. The top and front and rear sides of the catalyst assembly are limited by the top support frame and the front and rear supports, respectively. The fixed frame is located on the first side of the catalyst assembly, and the movable frame is located on the second side of the catalyst assembly. The fixed frame and the movable frame are fixedly connected by bolts to limit the left and right sides of the catalyst assembly. The movable support abuts against the movable frame. A first support sleeve is provided on the movable support. A second support sleeve is provided on the inner wall of the fixed frame or the housing assembly opposite to the movable support. The first support sleeve and the second support sleeve are fixedly connected by the positioning and clamping tube.

[0008] As an alternative, both the first support sleeve and the second support sleeve are U-shaped. The first support sleeve, the second support sleeve, and the positioning and clamping tube are respectively provided with waist-shaped holes for passing through the fixing bolts, so that the relative position of the positioning and clamping tube with the first support sleeve and the second support sleeve is adjustable.

[0009] As an alternative, sealing gaskets are provided between the first side surface of the catalyst assembly and the fixed frame, and between the second side surface of the catalyst assembly and the movable frame.

[0010] As an alternative, when the catalyst assembly is placed on the bottom support frame, the first side surface of the catalyst assembly is aligned with one end face of the bottom support frame, and the second side surface of the catalyst assembly protrudes at least 2 mm from the other end face of the bottom support frame.

[0011] As an alternative, the support assembly also includes a side support frame, which is welded to the inner wall of the housing assembly and to the side of the fixing frame away from the catalyst assembly to reinforce the fixing frame.

[0012] As an alternative, the bottom support frame is inverted U-shaped, with a reinforcing rib in the middle and process holes for easy welding.

[0013] As an optional solution, a maintenance space of 400mm to 500mm is provided between two adjacent catalyst components, and a maintenance door is provided on the housing component for each maintenance space.

[0014] As an alternative, an annular groove is provided around the door frame of the maintenance door, and a sealing ring is installed in the annular groove, which forms an annular seal with the door panel of the maintenance door.

[0015] As an alternative, the sealing ring uses a graphite gasket with a surface coated with stainless steel.

[0016] As an alternative, manholes with a nominal diameter of 500 mm are provided on the housing assembly near both ends.

[0017] The beneficial effects of this utility model are:

[0018] The encapsulation structure of this engine exhaust hydrocarbon compound treatment equipment effectively improves the installation reliability, sealing performance, maintainability, and structural adaptability of the catalyst assembly, as specifically demonstrated below:

[0019] 1) Optimized sealing and fixing: Through the coordinated limiting of the bottom support frame, top bracket, front and rear brackets, and fixed and movable frames, and combined with the clamping force applied by the positioning and clamping pipe, the stability and sealing effect of each catalyst component in the airflow channel are ensured, which helps the hydrocarbon compounds in the exhaust gas to react fully with the catalyst.

[0020] 2) Easy to maintain and replace: The design of the movable frame and movable support allows individual catalyst components to be independently clamped and disassembled, which facilitates the maintenance and replacement of catalyst components in a limited space and reduces the difficulty of maintenance;

[0021] 3) Stable structure and strong adaptability: The fixing and limiting forms in the up, down, left, right and front and back ensure reliable loading of the catalyst assembly in all directions. For different specifications of catalyst assembly, only the corresponding fasteners need to be replaced, such as replacing the movable frame with different area and the positioning and clamping tube with different length, which has a wide range of adaptability. Attached Figure Description

[0022] Figure 1 This is a front view of the packaging structure of the engine exhaust hydrocarbon compound treatment device provided in this embodiment of the utility model;

[0023] Figure 2 This is a top view of the packaging structure of the engine exhaust hydrocarbon compound treatment device provided in this embodiment of the utility model;

[0024] Figure 3 yes Figure 1 Sectional view at point AA;

[0025] Figure 4 yes Figure 2 Sectional view at point BB;

[0026] Figure 5 yes Figure 2Sectional view at CC;

[0027] Figure 6 yes Figure 4 Enlarged view at point D;

[0028] Figure 7 yes Figure 5 Enlarged view at point E in the middle;

[0029] Figure 8 yes Figure 3 Enlarged view at point F;

[0030] Figure 9 yes Figure 3 Enlarged view of point G in the middle.

[0031] In the attached image:

[0032] 1. Shell assembly; 2. Catalyst assembly; 3. Bottom support frame; 4. Top support; 5. Front and rear supports; 6. Fixed frame; 7. Movable frame; 8. Movable support; 9. Positioning and clamping tube; 10. First support sleeve; 11. Second support sleeve; 12. Mounting bracket; 13. Side support frame; 14. Reinforcing rib; 15. Maintenance space; 16. Maintenance door; 17. Annular groove; 18. Sealing ring; 19. Manhole. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "on the upper side," and "over" the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature include the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] Normally, multiple catalyst components 2 need to be fixed at the front and back, middle, and left and right sides during installation, with the left and right directions also requiring sealing, making the installation process demanding. Therefore, as... Figures 1 to 9 As shown, this utility model provides a packaging structure for an engine exhaust hydrocarbon compound treatment device, including a housing assembly 1, a catalyst assembly 2, and a support assembly. The housing assembly 1 is a cylindrical shape with openings at both ends, and an airflow channel is formed inside the housing assembly 1 with one end in and the other end out. Several catalyst assemblies 2 are arranged at intervals inside the housing assembly 1 along the airflow direction. The support assembly includes a bottom support frame 3, a top support frame 4, front and rear supports 5, a fixed frame 6, a movable frame 7, a movable support 8, and a positioning and clamping tube 9. The bottom support frame 3, top support frame 4, front and rear supports 5, and fixed frame 6 are welded to the inner wall of the housing assembly 1 respectively, corresponding to the arrangement position of each catalyst assembly 2. The catalyst assembly 2 is placed on the bottom support frame 3. The top and front and rear sides of the catalyst assembly 2 are limited by the top support 4 and the front and rear supports 5, respectively. The fixed frame 6 is located on the first side of the catalyst assembly 2, and the movable frame 7 is located on the second side of the catalyst assembly 2. The fixed frame 6 and the movable frame 7 are fixed together by bolts to limit the left and right sides of the catalyst assembly 2. The movable support 8 abuts against the movable frame 7. The movable support 8 is provided with a first support sleeve 10. The fixed frame 6 or the inner wall of the housing assembly 1 opposite to the movable support 8 is provided with a second support sleeve 11. The first support sleeve 10 and the second support sleeve 11 are fixed together by a positioning and clamping tube 9.

[0038] Among them, the bolts connecting the fixed frame 6 and the movable frame 7 are fully threaded screws. One end of the fully threaded screw is welded to the square tube of the fixed frame 6 with a hexagonal welding nut, which can ensure that when installing and replacing the catalyst assembly 2 multiple times, it can be locked on one side, improving the replacement efficiency and saving operating space. The other end uses a double anti-loosening method of a nut with an anti-loosening washer and a regular hexagonal nut to ensure the stable clamping of the catalyst assembly 2.

[0039] In at least one embodiment, the first support sleeve 10 and the second support sleeve 11 are both U-shaped to facilitate combination and disassembly with the positioning and clamping tube 9. The first support sleeve 10, the second support sleeve 11 and the positioning and clamping tube 9 are respectively provided with waist-shaped holes for passing through fixing bolts, so that the relative positions of the positioning and clamping tube 9 with the first support sleeve 10 and the second support sleeve 11 are adjustable.

[0040] The distance between the first support sleeve 10 and the second support sleeve 11 on the positioning and clamping tube 9 is adjusted by the waist-shaped hole so that the positioning and clamping tube 9 can press the movable bracket 8 on the basis of reliable support of the fixed frame 6 or the housing assembly 1. The movable bracket 8 presses the movable frame 7. The positioning and clamping tube 9 of one of the two adjacent catalyst assemblies 2 is fixedly connected to the fixed frame 6 of the other, and the positioning and clamping tube 9 of the outermost catalyst assembly 2 is fixedly connected to the housing assembly 1. This can press each catalyst assembly 2, prevent the exhaust gas from bypassing the catalyst assembly 2 and ensure the full reaction efficiency of the catalyst.

[0041] Furthermore, sealing gaskets are provided between the first side surface of the catalyst assembly 2 and the fixed frame 6, and between the second side surface of the catalyst assembly 2 and the movable frame 7, to ensure that the two sides of the multiple catalyst assemblies 2 and the catalyst are sealed without leakage.

[0042] Optionally, when the catalyst assembly 2 is placed on the bottom support frame 3, the first side surface of the catalyst assembly 2 is aligned with one end face of the bottom support frame 3, and the second side surface of the catalyst assembly 2 extends at least 2 mm beyond the other end face of the bottom support frame 3.

[0043] The 2mm gap ensures that the catalyst assembly 2 is compressed without interfering with the bottom support frame 3. It can not only be adapted to the current size of the catalyst assembly 2, but can also be replaced with other specifications of catalyst assembly according to the exhaust gas treatment needs, with a wide range of compatibility.

[0044] In at least one embodiment, the outer wall of the housing assembly 1 is provided with mounting brackets 12 for horizontal and vertical installation, which is compatible with the safety and reliability requirements of the engine exhaust hydrocarbon compound treatment equipment packaging structure in both horizontal and vertical installation states. In horizontal installation, the three bottom mounting brackets 12 serve as the load-bearing points for multiple catalyst assemblies 2 and the fixing points for the entire equipment. In vertical installation, the upper and lower mounting brackets 12 serve as the overall fixing points. Furthermore, the mounting brackets 12 can be configured with multiple sets of shock absorbers to meet the vibration reduction requirements of the equipment in different usage scenarios.

[0045] Furthermore, the support assembly also includes a side support frame 13, which is welded to the inner wall of the housing assembly 1 and to the side of the fixing frame 6 away from the catalyst assembly 2, to reinforce the fixing frame 6, especially to provide reliable support for the internal catalyst assembly 2 in the vertical installation state.

[0046] Optionally, the bottom support frame 3 is inverted U-shaped, with a reinforcing rib plate 14 in the middle of the bottom support frame 3, and process holes for easy welding are provided on the bottom support frame 3.

[0047] The reinforcing rib 14 improves the structural strength of the bottom support frame 3, and the process holes ensure full coverage of the inner and outer welding and the overall stability of the bottom support frame 3.

[0048] Optionally, a maintenance space 15 of 400mm to 500mm is provided between two adjacent catalyst components 2, and a maintenance door 16 is provided on the housing component 1 for each maintenance space 15 to facilitate inspection and replacement of the catalyst component 2.

[0049] Furthermore, an annular groove 17 is provided around the door frame of the maintenance door 16, and a sealing ring 18 is provided in the annular groove 17, forming an annular seal with the door panel of the maintenance door 16.

[0050] The contact surface of the annular seal is only the annular end face, which can avoid air leakage caused by poor contact due to poor flatness of the door panel. In addition, the 3mm annular groove 17 milled in can ensure that the 6mm high sealing ring 18 is not easy to slip, thus ensuring the sealing effect.

[0051] Furthermore, the sealing ring 18 uses a graphite gasket, the surface of which is covered with stainless steel.

[0052] The graphite-coated stainless steel structure effectively prevents the sealing ring 18 from being damaged by impact, and the sealing ring 18 with this structure has good heat resistance, with a high temperature resistance of up to 700℃~800℃.

[0053] Optionally, manholes 19 are provided on the housing assembly 1 near both ends. The nominal diameter of the manholes 19 is 500mm, which effectively avoids blind spots for inspection of the catalyst assembly 2 at the front and rear ends, and improves safety and reliability.

[0054] The specific encapsulation process of catalyst component 2:

[0055] First, place multiple catalyst components 2 on the bottom support frame 3. The front and rear sides of the catalyst components 2 are in contact with the front and rear supports 5 respectively, ensuring that the front and rear surfaces of the stacked catalyst components 2 are parallel and pressed together without slipping. Then, use bolts to connect the front and rear parts of the fixed frame 6 and the movable frame 7 to fix the catalyst components 2 in the front and rear direction.

[0056] Secondly, after multiple catalyst components 2 are stacked on the bottom support frame 3, they are limited by the top bracket 4. The upper and lower parts of the fixed frame 6 and the movable frame 7 are connected by bolts to fix the catalyst components 2 in the vertical direction.

[0057] Finally, the movable bracket 8 presses the movable frame 7, and the distance between the positioning clamping tube 9 and the first support sleeve 10 and the second support sleeve 11 is adjusted through the waist-shaped hole to ensure that the movable bracket 8 can be pressed. Then, the bolts are used to lock it, so as to achieve the fixation and sealing of the catalyst assembly 2 in the left and right directions.

[0058] In summary, the packaging structure of this engine exhaust hydrocarbon compound treatment equipment provides a novel packaging structure that is simple in structure, easy to stack catalysts, press-fit tightly, saves space, is easy to disassemble and maintain, has good sealing, high reaction efficiency, wide applicability, and flexible installation.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A packaging structure for an engine exhaust hydrocarbon compound treatment device, characterized in that, The assembly includes a housing assembly (1), a catalyst assembly (2), and a support assembly. The housing assembly (1) is a cylindrical shape with openings at both ends, and an airflow channel is formed inside the housing assembly (1) with one end in and the other end out. Several catalyst assemblies (2) are arranged at intervals inside the housing assembly (1) along the airflow direction. The support assembly includes a bottom support frame (3), a top support frame (4), front and rear supports (5), a fixed frame (6), a movable frame (7), a movable support frame (8), and a positioning and clamping tube (9). The bottom support frame (3), the top support frame (4), the front and rear supports (5), and the fixed frame (6) are welded to the inner wall of the housing assembly (1) respectively, corresponding to the arrangement position of each catalyst assembly (2), and the bottom of the catalyst assembly (2) is placed on the bottom support frame (3). The top and front and rear sides of the catalyst assembly (2) are respectively limited by the top bracket (4) and the front and rear brackets (5). The fixed frame (6) is located on the first side of the catalyst assembly (2), and the movable frame (7) is located on the second side of the catalyst assembly (2). The fixed frame (6) and the movable frame (7) are fixed together by bolts to limit the left and right sides of the catalyst assembly (2). The movable bracket (8) abuts against the movable frame (7). A first support sleeve (10) is provided on the movable bracket (8). A second support sleeve (11) is provided on the inner wall of the fixed frame (6) or the housing assembly (1) opposite to the movable bracket (8). The first support sleeve (10) and the second support sleeve (11) are fixed together by the positioning and clamping tube (9).

2. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 1, characterized in that, Both the first support sleeve (10) and the second support sleeve (11) are U-shaped. The first support sleeve (10), the second support sleeve (11) and the positioning and clamping tube (9) are respectively provided with waist-shaped holes for passing through fixing bolts, so that the relative position of the positioning and clamping tube (9) with the first support sleeve (10) and the second support sleeve (11) is adjustable.

3. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 1, characterized in that, Sealing gaskets are respectively provided between the first side surface of the catalyst assembly (2) and the fixed frame (6), and between the second side surface of the catalyst assembly (2) and the movable frame (7).

4. The packaging structure for the engine exhaust hydrocarbon compound treatment equipment according to claim 1, characterized in that, When the catalyst assembly (2) is placed on the bottom support frame (3), the first side surface of the catalyst assembly (2) is aligned with one end face of the bottom support frame (3), and the second side surface of the catalyst assembly (2) protrudes at least 2 mm from the other end face of the bottom support frame (3).

5. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 1, characterized in that, The support assembly also includes a side support frame (13), which is welded to the inner wall of the housing assembly (1) and to the side of the fixing frame (6) away from the catalyst assembly (2) to reinforce the fixing frame (6).

6. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 1, characterized in that, The bottom support frame (3) is inverted U-shaped, and a reinforcing rib plate (14) is provided in the middle of the bottom support frame (3). Process holes for easy welding are provided on the bottom support frame (3).

7. The packaging structure for the engine exhaust hydrocarbon compound treatment equipment according to claim 1, characterized in that, A maintenance space (15) of 400mm to 500mm is provided between two adjacent catalyst components (2), and a maintenance door (16) is provided on the housing component (1) corresponding to each maintenance space (15).

8. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 7, characterized in that, The maintenance door (16) has an annular groove (17) around its frame, and a sealing ring (18) is provided in the annular groove (17). The sealing ring (18) and the door panel of the maintenance door (16) form an annular seal.

9. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 8, characterized in that, The sealing ring (18) is made of graphite gasket, and the surface of the graphite gasket is covered with stainless steel.

10. The packaging structure of the engine exhaust hydrocarbon compound treatment device according to claim 1, characterized in that, The housing assembly (1) has manholes (19) located near both ends, and the nominal diameter of the manholes (19) is 500 mm.

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