Locking structure for catalyst assembly of tail gas after-treatment equipment

Abstract

The utility model relates to the technical field of tail gas after-treatment, and discloses a tail gas after-treatment equipment catalyst assembly locking structure which comprises an equipment shell, a fixed frame, a bearing plate, a supporting pipe, a movable frame, a clamping assembly, an upper pressing plate and a pressing assembly. The locking structure for the catalyst assembly of the tail gas aftertreatment equipment can fix the catalyst assembly in the up-down direction, the left-right direction and the front-back direction, reliable installation of the catalyst assembly is guaranteed, the space utilization rate is increased, the material cost is saved, the position adjustment and maintenance difficulty is reduced, and the catalyst replacement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas aftertreatment technical field especially relates to a tail gas aftertreatment equipment catalyst assembly locking structure. BACKGROUND

[0002] The flue gas emitted when the internal combustion engine works contains a large amount of nitrogen oxides (NOx), which not only stimulates the respiratory system of human beings, damages animals and plants, but also is one of the main substances causing acid rain and photochemical reaction, destroying the ozone layer and further causing the greenhouse effect. In recent years, with the increasing improvement of the national environmental protection consciousness and environmental protection regulations, the flue gas denitration technology has been adopted for the emission source of NOx to realize the NOx emission reduction. The flue gas denitration technology needs to be matched with a denitration device, and the role of the denitration device is to mix the reducing agent with the flue gas to realize the denitration. The reducing agent used in the denitration device is a catalyst, and the service life of the catalyst is generally about 10000h. In the prior art, the catalyst is usually packaged in a catalyst module, so the catalyst module must be detachable to facilitate replacement. The catalyst module is a ceramic product and is a fragile component, so the packaging scheme of the catalyst module in the reaction device is particularly important.

[0003] The catalyst module has various packaging methods, and the effects of the packaging are different. The multiple groups of catalysts in the catalyst module are generally stacked, and after the stacking, the catalyst module has a large size and a large number, and it is difficult to achieve sealing, which leads to the fact that the catalyst cannot fully react with the exhaust gas, thereby reducing the reaction efficiency, and the catalyst stacking mode is generally integral stacking, and the catalyst has a high strength requirement and is inconvenient to move.

[0004] In view of this, some manufacturers replace and maintain the multiple groups of catalysts by putting them in through the front door or the rear door, but when the number of the catalyst assemblies is large, the packaging volume is large, and it is difficult to adjust the position of the catalyst inside. Some manufacturers adopt a grouping mode for the catalyst and the fixed frame, although the mode can tightly press and fit and has a good sealing effect and facilitates the position adjustment and maintenance, but the mode uses more profiles and has a high manufacturing cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a tail gas aftertreatment equipment catalyst assembly locking structure to solve the problems in the background art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A tail gas aftertreatment equipment catalyst assembly locking structure, comprising an equipment shell, a fixed frame, a bearing plate, a support pipe, a movable frame, a clamping assembly, an upper pressing plate and a pressing assembly, wherein:

[0008] The direction from one end of the equipment shell to the other end is the airflow flow direction, and the side surface of the equipment shell is provided with a maintenance window, and a maintenance door assembly is installed on the maintenance window.

[0009] The fixed frame is fixed on the inner wall of the equipment shell perpendicularly to the airflow flow direction.

[0010] The bearing plate is fixed to the bottom of the inner wall of the equipment shell, and the catalyst assembly to be locked is placed on the bearing plate through the maintenance window.

[0011] The support pipe is fixed to the bottom of the inner wall of the equipment shell, and the fixed frame is located at one end of the bearing plate, and the support pipe is located at the other end of the bearing plate.

[0012] The movable frame is placed on the support pipe and arranged opposite to the fixed frame.

[0013] The clamping assembly is used to drive the movable frame to move relative to the fixed frame, so that the movable frame cooperates with the fixed frame to fix the catalyst assembly in the first direction.

[0014] The upper pressing plate is located above the catalyst assembly and between the fixed frame and the movable frame.

[0015] The pressing assembly is used to drive the upper pressing plate to move relative to the bearing plate, so that the upper pressing plate cooperates with the bearing plate to fix the catalyst assembly in the second direction.

[0016] As an optional solution, the clamping assembly includes a bolt, the bolt penetrates the fixed frame and the movable frame at the same time, the outer side of the fixed frame is provided with a first nut threadedly matched with the bolt, and the outer side of the movable frame is provided with a second nut threadedly matched with the bolt.

[0017] As an optional solution, the bolts are distributed on both sides of the catalyst assembly, and the bolts on both sides limit the catalyst assembly in the third direction.

[0018] As an optional solution, a waist-shaped hole is formed on the fixed frame and the movable frame respectively for the bolt to pass through, so that the position of the bolt in the third direction is adjustable.

[0019] As an optional solution, the pressing assembly includes a welding seat fixed to the equipment shell, a screw rod and a jacking rod are arranged in the welding seat, one end of the jacking rod abuts against the screw rod, and the other end of the jacking rod extends into the interior of the equipment shell and abuts against the upper pressing plate.

[0020] As an optional solution, a sealing cavity is formed at the end of the welding seat away from the equipment shell, and a flat gasket, a graphite gasket, a pressing ring and a pressing nut are sequentially sleeved on the screw rod in the sealing cavity, and the pressing nut is threadedly connected with the welding seat.

[0021] As an alternative, the fixed frame, the bearing plate and the support tube are sequentially abutted, the size of the catalyst assembly in the first direction is not less than the size of the bearing plate, and the height of the bearing plate is greater than the height of the support tube.

[0022] As an alternative, the upper pressing plate abuts against the upper surface of the catalyst assembly, and the upper pressing plate leaves an adjusting gap with the equipment shell, and the size of the catalyst assembly in the first direction is not less than the size of the upper pressing plate.

[0023] As an alternative, the maintenance door assembly comprises a door frame and a door plate, the door frame is fixedly connected with the maintenance window, the door plate is connected with the door frame through a hinge, and an annular groove is formed in the door frame, and a sealing ring for contacting the door plate is embedded in the annular groove.

[0024] As an alternative, two catalyst assemblies are installed at one maintenance window, each catalyst assembly is provided with a set of fixed frame, bearing plate, support tube, movable frame, clamping assembly, upper pressing plate and pressing assembly, the movable frames of the two catalyst assemblies are oppositely arranged, and the fixed frames of the two catalyst assemblies are aligned with both ends of the rim of the maintenance window.

[0025] The tail gas aftertreatment equipment catalyst assembly locking structure has the advantages that the catalyst assembly can be fixed in up-down, left-right and front-rear directions, reliable installation of the catalyst assembly is ensured, space utilization is improved, material cost is saved, position adjustment and maintenance difficulty are reduced, and catalyst replacement efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a front view of the tail gas aftertreatment equipment catalyst assembly locking structure provided by the embodiment of the utility model;

[0027] Figure 2 is a top view of the tail gas aftertreatment equipment catalyst assembly locking structure provided by the embodiment of the utility model;

[0028] Figure 3 is Figure 1 the cross-sectional view of A-A in FIG. 1;

[0029] Figure 4 is Figure 2 the enlarged view of B in FIG. 1;

[0030] Figure 5 is Figure 2 the enlarged view of C in FIG. 1;

[0031] Figure 6 is Figure 1 the enlarged view of D in FIG. 1;

[0032] Figure 7 is Figure 2 the enlarged view of E in FIG. 1.

[0033] In the drawings:

[0034] 1. Equipment housing

[0035] 2. Fixed frame; 21. Waist-shaped hole

[0036] 3. Bearing plate; 31. Rib plate

[0037] 4. Support pipe

[0038] 5. Movable frame

[0039] 6. Clamping assembly; 61. Bolt; 62. First nut; 63. Second nut; 64. Adjustable gap

[0040] 7. Upper pressing plate; 71. Adjusting gap

[0041] 8. Pressing assembly; 81. Welding seat; 82. Screw rod; 83. Jack; 84. Flat washer; 85. Graphite washer; 86. Pressing ring; 87. Pressing nut

[0042] 9. Maintenance door assembly; 91. Door frame; 92. Door plate; 93. Annular groove; 94. Sealing ring

[0043] 10. Catalyst assembly DETAILED DESCRIPTION

[0044] The utility model will be further described in detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0045] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is in second feature "on", "above" and "upper surface" includes that first feature is in second feature directly above and obliquely above, or just indicates that first feature horizontal height is higher than second feature.First feature is in second feature "under", "below" and "under surface" includes that first feature is in second feature directly below and obliquely below, or just indicates that first feature horizontal height is less than second feature.

[0047] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0048] Please refer to Figures 1 to 7 As shown in the figure, the utility model provides a tail gas aftertreatment equipment catalyst assembly locking structure, including equipment shell 1, fixed frame 2, bearing plate 3, support pipe 4, movable frame 5, clamping assembly 6, upper pressing plate 7 and pressing assembly 8, wherein:

[0049] The direction from one end to the other end of equipment shell 1 is the gas flow direction, and the side surface of equipment shell 1 is provided with a maintenance window, and a maintenance door assembly 9 is installed on the maintenance window;

[0050] The fixed frame 2 is fixed on the inner wall of the equipment shell 1 perpendicular to the gas flow direction;

[0051] The bearing plate 3 is fixed to the inner wall bottom of the equipment shell 1, and the catalyst assembly 10 to be locked is placed on the bearing plate 3 through the maintenance window;

[0052] The support pipe 4 is fixed to the inner wall bottom of the equipment shell 1, and the fixed frame 2 is located at one end of the bearing plate 3, and the support pipe 4 is located at the other end of the bearing plate 3;

[0053] The movable frame 5 is placed on the support pipe 4 and arranged opposite to the fixed frame 2;

[0054] The clamping assembly 6 is used to drive the movable frame 5 to move relative to the fixed frame 2, so that the movable frame 5 cooperates with the fixed frame 2 to fix the catalyst assembly 10 in the first direction;

[0055] The upper pressing plate 7 is located above the catalyst assembly 10 and between the fixed frame 2 and the movable frame 5.

[0056] The pressing assembly 8 is used to drive the upper pressing plate 7 to move relative to the bearing plate 3, so that the upper pressing plate 7 cooperates with the bearing plate 3 to fix the catalyst assembly 10 in the second direction.

[0057] Thus, the catalyst assembly 10 can be fixed in the up-down direction (second direction), left-right direction (first direction) and front-rear direction (third direction), which ensures reliable installation of the catalyst assembly 10, improves space utilization, saves material cost, reduces position adjustment and maintenance difficulty, and improves catalyst replacement efficiency.

[0058] Alternatively, the clamping assembly 6 includes a bolt 61 which penetrates the fixed frame 2 and the movable frame 5 at the same time, the outer side of the fixed frame 2 is provided with a first nut 62 which is threadedly matched with the bolt 61, and the outer side of the movable frame 5 is provided with a second nut 63 which is threadedly matched with the bolt 61.

[0059] Preferably, the first nut 62 is welded on the fixed frame 2 or the door frame 91 of the maintenance door assembly 9 or the inside of the equipment shell 1, which realizes single-side locking of the bolt 61, ensures multiple installation and replacement of the catalyst assembly 10, improves replacement efficiency, and saves operation space; the second nut 63 should have a loosening prevention function and can be provided with more than one, and the embodiment adopts a double loosening prevention structure example of a loosening prevention washer nut plus a common hexagonal nut, which ensures installation stability of the catalyst assembly 10.

[0060] Further, the bolts 61 are distributed on both sides of the catalyst assembly 10, and the bolts 61 on both sides limit the catalyst assembly 10 in the third direction. Still further, the fixed frame 2 and the movable frame 5 are respectively provided with a waist-shaped hole 21 for the bolt 61 to pass through, so that the position of the bolt 61 in the third direction is adjustable.

[0061] Thus, as shown in Figure 4 and Figure 5 , an adjustable gap 64 is left between the catalyst assembly 10 and the bolts 61 on both sides, which can realize front-rear movement adjustment function according to the size and position of the catalyst assembly 10, until the front and rear end faces of the catalyst assembly 10 are limited by the bolts 61 and cannot slide.

[0062] In addition, sealing washers can be added between the catalyst assembly 10 and the fixed frame 2 and the movable frame 5 to ensure the sealing of the left and right end faces of the catalyst assembly 10.

[0063] Alternatively, as shown in Figure 6 , the pressing assembly 8 includes a welded seat 81 fixed to the equipment shell 1, a screw rod 82 and a jacking rod 83 are arranged in the welded seat 81, one end of the jacking rod 83 abuts against the screw rod 82, and the other end of the jacking rod 83 extends into the inside of the equipment shell 1 and abuts against the upper pressing plate 7.

[0064] Further, the end of the welding seat 81 away from the equipment shell 1 is provided with a sealing cavity, and the sealing cavity is provided with a flat gasket 84, a graphite gasket 85, a compression ring 86 and a compression nut 87 which are sequentially sleeved on the screw rod 82, and the compression nut 87 is threadedly connected with the welding seat 81.

[0065] Therefore, the compression ring 86, the graphite gasket 85 and the flat gasket 84 are compressed by the cooperation of the compression nut 87 and the welding seat 81, so that the air leakage phenomenon during the up-down movement of the screw rod 82 is fully guaranteed, and safety and reliability are achieved.

[0066] Optionally, the fixed frame 2, the bearing plate 3 and the support pipe 4 are sequentially abutted, the size of the catalyst assembly 10 in the first direction is not less than the size of the bearing plate 3, and the height of the bearing plate 3 is greater than the height of the support pipe 4. The bearing plate 3 here is preferably inverted U-shaped, and in order to ensure the support strength of the bearing plate 3, a rib plate 31 is welded between the hollow part of the bearing plate 3 and the equipment shell 1, so that the catalyst assembly 10 is stably placed on the bearing plate 3.

[0067] Optionally, the upper pressing plate 7 abuts against the upper surface of the catalyst assembly 10, and the upper pressing plate 7 and the equipment shell 1 are provided with an adjusting gap 71, and the size of the catalyst assembly 10 in the first direction is not less than the size of the upper pressing plate 7. The adjusting gap 71 here is about 10 mm, which can compensate for the installation cumulative error caused by the size error of the catalyst, thereby improving the universality.

[0068] Optionally, the maintenance door assembly 9 comprises a door frame 91 and a door plate 92, the door frame 91 is fixedly connected with the maintenance window, the door plate 92 is connected with the door frame 91 through a hinge, and the door frame 91 is provided with an annular groove 93, and a sealing ring 94 for contacting the door plate 92 is embedded in the annular groove 93, which will be described in detail Figure 7 .

[0069] Therefore, the annular sealing mode between the door plate 92 and the door frame 91 can avoid the air leakage phenomenon caused by poor contact due to poor flatness of the door plate 92. The sealing material of the sealing ring 94 here is graphite, which can withstand a temperature of 700-800℃, and the graphite is provided with a stainless steel edge inside and outside, which can avoid collision damage.

[0070] In addition, the fixation of the fixed frame 2, the movable frame 5, the bearing plate 3 and the support pipe 4 relies on welding on one hand and the door frame 91 of the maintenance door assembly 9 on the other hand, thereby achieving double insurance for the fixation stability.

[0071] Optionally, two catalyst assemblies 10 are installed at one maintenance window, each catalyst assembly 10 is provided with a set of fixed frame 2, carrier plate 3, support tube 4, movable frame 5, clamping assembly 6, upper pressing plate 7 and pressing assembly 8, the movable frames 5 of the two catalyst assemblies 10 are oppositely arranged, and the fixed frames 2 of the two catalyst assemblies 10 are aligned with the two ends of the lip of the maintenance window.

[0072] Thus, the two catalyst assemblies 10 can share the maintenance space, on the one hand, the maintenance space is saved, the length of the equipment shell 1 is shortened, the materials and costs are saved, on the other hand, the efficiency of checking and replacing the catalyst is ensured.

[0073] The specific installation process is as follows:

[0074] 1) The fixed frame 2, the carrier plate 3, the rib plate 31, the support tube 4 and the four surrounding door frames 91 of the maintenance door assembly 9 are respectively welded and fixed with the equipment shell 1; the movable frame 5 is made into a separate whole and can move left and right;

[0075] 2) The catalyst assembly 10 is loaded from the maintenance window to the carrier plate 3, and the upper pressing plate 7 is placed on the catalyst assembly 10;

[0076] 3) The clamping assembly 6 is installed, the bolt 61 is connected with the first nut 62 and the second nut 63, so that the movable frame 5, the catalyst assembly 10 and the fixed frame 2 form a pre-fixing;

[0077] 4) The relative position of the bolt 61 in the waist-shaped hole 21 is adjusted according to the size of the catalyst assembly 10, so as to ensure that the front and rear end faces of the catalyst module stacked by multiple catalysts are pressed by the bolt 61 and do not slip;

[0078] 5) The pressing assembly 8 is welded on the equipment shell 1, the screw rod 82 is screwed into the welded seat 81, the top rod 83 is driven to press the upper pressing plate 7, and the locking in the up-down direction of the catalyst assembly 10 is realized;

[0079] 6) The second nut 63 is tightened, so that the movable frame 5 cooperates with the fixed frame 2 to lock the catalyst assembly 10, and the fixation in the left-right direction and the front-rear direction of the catalyst assembly 10 is realized.

[0080] Thus, the catalyst assembly locking structure of the tail gas aftertreatment equipment provides a catalyst assembly 10 packaging structure which is simple in structure, easy to stack, closely fitted after pressing, saves space, adjustable around, convenient to install, disassemble and maintain, good sealing, high reaction efficiency and cost saving.

[0081] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A catalyst assembly locking structure for exhaust gas aftertreatment equipment, characterized in that, The equipment includes a housing (1), a fixed frame (2), a bearing plate (3), a support tube (4), a movable frame (5), a clamping assembly (6), an upper pressure plate (7), and a pressing assembly (8), wherein: The direction from one end of the equipment housing (1) to the other end is the airflow direction. A maintenance window is provided on the side surface of the equipment housing (1), and a maintenance door assembly (9) is installed on the maintenance window. The fixed frame (2) is fixed to the inner wall of the equipment housing (1) perpendicular to the airflow direction; The support plate (3) is fixed to the bottom of the inner wall of the equipment housing (1), and the catalyst assembly (10) to be locked is placed on the support plate (3) through the maintenance window; The support tube (4) is fixed to the bottom of the inner wall of the equipment housing (1), and the fixing frame (2) is located at one end of the bearing plate (3), while the support tube (4) is located at the other end of the bearing plate (3). The movable frame (5) is placed on the support tube (4) and arranged opposite to the fixed frame (2); The clamping assembly (6) is used to drive the movable frame (5) to move relative to the fixed frame (2), so that the movable frame (5) cooperates with the fixed frame (2) to fix the catalyst assembly (10) in a first direction; The upper pressure plate (7) is located above the catalyst assembly (10) and between the fixed frame (2) and the movable frame (5); The clamping assembly (8) is used to drive the upper pressure plate (7) to move relative to the support plate (3), so that the upper pressure plate (7) and the support plate (3) cooperate to fix the catalyst assembly (10) in the second direction.

2. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, The clamping assembly (6) includes a bolt (61) that passes through both the fixed frame (2) and the movable frame (5). A first nut (62) that is threadedly engaged with the bolt (61) is provided on the outer side of the fixed frame (2), and a second nut (63) that is threadedly engaged with the bolt (61) is provided on the outer side of the movable frame (5).

3. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 2, characterized in that, The bolts (61) are distributed on both sides of the catalyst assembly (10), and the bolts (61) on both sides limit the catalyst assembly (10) in a third direction.

4. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 3, characterized in that, The fixed frame (2) and the movable frame (5) are respectively provided with waist-shaped holes (21) for the bolt (61) to pass through, so that the position of the bolt (61) in the third direction is adjustable.

5. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, The clamping assembly (8) includes a welding seat (81) fixed on the equipment housing (1). A screw (82) and a push rod (83) are inserted through the welding seat (81). One end of the push rod (83) abuts against the screw (82), and the other end of the push rod (83) extends into the interior of the equipment housing (1) and abuts against the upper pressure plate (7).

6. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 5, characterized in that, A sealing cavity is provided at the end of the welding seat (81) away from the equipment housing (1). A flat washer (84), a graphite washer (85), a clamping ring (86) and a clamping nut (87) are sequentially sleeved on the screw (82). The clamping nut (87) is threadedly connected to the welding seat (81).

7. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, The fixed frame (2), the bearing plate (3), and the support tube (4) are attached to each other in sequence. The size of the catalyst assembly (10) in the first direction is not less than the size of the bearing plate (3), and the height of the bearing plate (3) is greater than the height of the support tube (4).

8. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, The upper pressure plate (7) is attached to the upper surface of the catalyst assembly (10), and the upper pressure plate (7) and the equipment housing (1) have an adjustment gap (71). The size of the catalyst assembly (10) in the first direction is not less than the size of the upper pressure plate (7).

9. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, The maintenance door assembly (9) includes a door frame (91) and a door panel (92). The door frame (91) is fixedly connected to the maintenance window. The door panel (92) is connected to the door frame (91) by a hinge. An annular groove (93) is provided on the door frame (91). A sealing ring (94) for contacting the door panel (92) is installed in the annular groove (93).

10. The catalyst assembly locking structure of the exhaust gas aftertreatment equipment according to claim 1, characterized in that, Two catalyst assemblies (10) are installed at one of the maintenance windows. Each catalyst assembly (10) is provided with a set of fixed frames (2), a bearing plate (3), a support tube (4), a movable frame (5), a clamping assembly (6), an upper pressure plate (7), and a pressing assembly (8). The movable frames (5) of the two catalyst assemblies (10) are arranged opposite to each other, and the fixed frames (2) of the two catalyst assemblies (10) are aligned with the two ends of the edge of the maintenance window.

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