Multi-layer shell structure of SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model relates to the field of SCR (Selective Catalytic Reduction) denitration reactors, and discloses a multilayer shell structure of an SCR denitration reactor, which comprises a plurality of groups of catalyst shells, two groups of catalyst shells are connected through an expansion joint, the bottom of the lowermost catalyst shell is fixedly connected with a reaction shell outlet flue, and the bottom of the lowermost catalyst shell is fixedly connected with a reaction shell outlet flue. The bottom of the reaction shell outlet flue is fixedly connected with a heat exchanger shell, the bottom of the heat exchanger shell is fixedly connected with an ash bucket, and the catalyst shell comprises a shell supporting beam. According to the utility model, on the premise of not increasing the type selection of the supporting beam of the bottommost shell, expansion joints and independent supporting beams among the components at the lower part are canceled, the connection form between the upper shell and the lower component is optimized and adjusted, and meanwhile, a novel cross beam structure form is adopted, so that the original plate rib structure is simplified, and the structure is clear in force transmission; and the model selection of the reactor profile is more reasonable and economical, and the steel consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of SCR denitration reactor, especially SCR denitration reactor multilayer shell structure. BACKGROUND

[0002] SCR denitration reactor is one of the core equipment of selective catalytic reduction (SCR) denitration technology. Its basic working principle is that under the action of a certain temperature and catalyst, through selective catalytic reduction process, using reducing agent (such as ammonia, ammonia water or urea, etc.) to selectively reduce nitrogen oxides (NOx) in flue gas into non-toxic, non-polluting nitrogen (N2) and water (H2O).

[0003] In order to ensure that the denitration reaction proceeds normally, an SCR denitration reactor multilayer shell structure is needed.

[0004] The current SCR denitration reactor shell adopts a plate rib frame structure, sets multiple layers of catalyst support beams, the reactor and the upper load are transmitted to the shell wall plate through the support beam, and then the load is transmitted to the bottommost shell support beam by the wall plate, and the catalyst installation door for conveying catalyst is installed on the shell. However, in actual use, the denitration reactor shell plate rib structure is complex, the structure force transmission is not clear, the reinforcing rib on the plate is large in selection, and the steel consumption of the overall equipment is increased. The catalyst installation door on the shell wall plate breaks the column structure of the shell wall plate, the catalyst installation door becomes a bearing structure, and safety accidents are prone to occur; when the number of catalyst layers required by design is large, the thermal expansion amount of the shell is too large under high temperature environment, and the radial and axial selection of the expansion joint is too large, therefore, an SCR denitration reactor multilayer shell structure is proposed to solve the above problems. Utility model content

[0005] In order to make up for the above shortcomings, the utility model provides an SCR denitration reactor multilayer shell structure, which aims to improve the problems of unclear force transmission structure, increased overall steel consumption, installation door breaking column structure, and safety hazards in the prior art.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of SCR denitration reactor multilayer shell structure, including catalyst shell, the catalyst shell is provided with multiple groups, expansion joint is connected between two groups of the catalyst shell, the bottom of the lowermost catalyst shell is fixedly connected with reaction shell outlet flue, the bottom of the reaction shell outlet flue is fixedly connected with heat exchanger shell, the bottom of the heat exchanger shell is fixedly connected with ash bucket, the catalyst shell includes shell support beam, the outer side of the shell support beam is fixedly connected with horizontal direction limit block, the outer side of the horizontal direction limit block is fixedly connected with outer side support beam, the top of the shell support beam is fixedly connected with force transmission element by node reinforcement, the inner side of the force transmission element is fixedly connected with catalyst support beam by T-shaped reinforcement, the inner side of the force transmission element and catalyst support beam is fixedly connected with shell wallboard, the bottom of the shell wallboard is fixedly connected on the top of shell support beam.

[0007] As further description of the above technical solution:

[0008] The catalyst support beam is provided with two groups, which divides the shell wallboard into three parts, the front of the upper shell wallboard is provided with a common installation door, the front of the lower shell wallboard is provided with an installation door reinforcing assembly, the installation door reinforcing assembly includes a door column reinforcing piece, the door column reinforcing piece is fixedly connected to the front of the shell wallboard, the door column reinforcing piece is fixedly connected to the top of the catalyst support beam, the top of the door column reinforcing piece is fixedly connected with a door beam reinforcing piece, the top of the door beam reinforcing piece is fixedly connected with an inclined strut, the bottom of the door beam reinforcing piece and the inner side of the door column reinforcing piece are provided with a reinforcing door, and the bottom of the door column reinforcing piece is fixedly connected with a bottom reinforcing piece.

[0009] As further description of the above technical solution:

[0010] The horizontal direction limit block includes a stop block assembly, the stop block assembly is fixedly connected to the inner side of the outer support beam, the stop block assembly is slidably connected with a limiting assembly inside, and the limiting assembly is fixedly connected to the outer periphery of the shell support beam.

[0011] As further description of the above technical solution:

[0012] The stop block assembly is composed of a plurality of triangular plates and a profile steel, and the limiting assembly is composed of a plurality of triangular plates and a profile steel.

[0013] As further description of the above technical solution:

[0014] The bottom of the lowermost shell support beam is fixedly connected with a support plate piece, the inner side of the support plate piece is fixedly connected to the wall plate of the shell outlet flue, the inner side of the shell outlet flue is fixedly connected with a connecting plate piece, and the top end of the reaction shell outlet flue is fixedly connected to the subject support beam.

[0015] As a further description of the above technical solutions:

[0016] The connecting plate member is a folded plate, and the outer upper part of the connecting plate member is fixedly connected to the inner side of the shell support beam.

[0017] As a further description of the above technical solutions:

[0018] The shell wall plate is fixedly connected to the inner side of the force transmission member at the four corners through a rectangular plate.

[0019] As a further description of the above technical solutions:

[0020] The back of the inclined support member is fixedly connected to the bottom of the upper catalyst support beam, the back of the middle bottom reinforcing member is fixedly connected to the side of the catalyst support beam, and the back of the bottom bottom reinforcing member is fixedly connected to the side of the shell support beam.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by setting the shell support beam and the node reinforcing member, without increasing the bottom shell support beam selection, the expansion joint and the separate support beam between the lower parts are cancelled, the connection form between the upper shell and the lower assembly is optimized and adjusted, a new beam structure form is adopted, the original plate reinforcement structure is simplified, the structure force transmission is clear, the reactor profile selection is more reasonable and economical, and the steel consumption is reduced.

[0023] 2. In the utility model, by setting the installation door reinforcing assembly, when the catalyst installation door is designed on the stress side shell wall plate, the door beam and the door column are specially reinforced to reduce deformation and ensure the safety of the catalyst installation door.

[0024] 3. In the utility model, the upper shell of the reactor is disconnected, a layered series design is adopted, the height of the single shell is reduced, the stress of the bottom shell support beam is reduced, the shell height direction thermal expansion amount is reduced, and the support beam and the expansion joint are reasonable and economical. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 An overall schematic view of a multi-layer shell structure of an SCR denitration reactor is provided in the utility model;

[0026] Figure 2 A shell front view of a multi-layer shell structure of an SCR denitration reactor is provided in the utility model;

[0027] Figure 3 A support plate member partial view of a multi-layer shell structure of an SCR denitration reactor is provided in the utility model;

[0028] Figure 4 A kind of catalyst installation door reinforcing assembly schematic diagram of the multi-layer shell structure of SCR denitration reactor of the utility model is provided;

[0029] Figure 5 A kind of node assembly schematic diagram of the middle layer and the lowest layer of shell of the multi-layer shell structure of SCR denitration reactor of the utility model is provided;

[0030] Figure 6 A kind of shell corner node schematic diagram of the multi-layer shell structure of SCR denitration reactor of the utility model is provided;

[0031] Figure 7 A kind of limiting block schematic diagram of the multi-layer shell structure of SCR denitration reactor of the utility model is provided.

[0032] Legend:

[0033] 1, catalyst shell;1-1, shell support beam;1-1-1, node reinforcing part;1-2, catalyst support beam;1-2-1, T-shaped reinforcing part;1-3, shell wallboard;1-3-1, rectangular plate;1-4, force transmission element;1-5, ordinary installation door;1-6, installation door reinforcing assembly;1-6-1, reinforced door;1-6-2, door column reinforcing part;1-6-3, door beam reinforcing part;1-6-4, inclined strut;1-6-5, bottom reinforcing part;2, expansion joint;3, horizontal direction limiting block;3-1, stop block assembly;3-2, limiting assembly;4, reaction shell outlet flue;5, heat exchanger shell;6, ash bucket;7-1, support plate part;7-2, connecting plate part. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model below, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0035] Referring to Figures 1-2 , the utility model provides an embodiment: a kind of SCR denitration reactor multi-layer shell structure, including catalyst shell 1, catalyst shell 1 is provided with multiple groups, expansion joint 2 is connected between two groups of catalyst shell 1, expansion joint 2 is a kind of flexible element that can effectively play the deformation effect of catalyst shell 1, the bottom of the lowest layer catalyst shell 1 is fixedly connected with reaction shell outlet flue 4, the bottom of reaction shell outlet flue 4 is fixedly connected with heat exchanger shell 5, and the bottom of heat exchanger shell 5 is fixedly connected with ash bucket 6 of the ash receiving.

[0036] Referring toFigures 5-6 The catalyst shell 1 includes a shell support beam 1-1. The internal load of the catalyst shell 1 is transferred to the external support by the shell support beam 1-1. A force transmission component 1-4 is fixedly connected to the top of the shell support beam 1-1 via a node reinforcement 1-1-1. Multiple sets of force transmission components 1-4 are evenly distributed on the top of the shell support beam 1-1. A catalyst support beam 1-2, which supports a single layer of catalyst, is fixedly connected to the top of the force transmission component 1-4 via a T-shaped reinforcement 1-2-1. Special node treatment is required for the connection between the force transmission component 1-4 and the shell support beam 1-1 and the catalyst support beam 1-2 to ensure smooth load transfer. Figure 5 In section II, the node structure at the bottom layer of the shell is shown. The node structure between the force transmission component 1-4 and the shell support beam 1-1 is composed of node reinforcement 1-1-1. Node reinforcement 1-1-1 is composed of several plates, and its cross-sectional shape varies depending on the force transmission component 1-4. If the force transmission component 1-4 is a channel steel, then node reinforcement 1-1-1 is a C-shaped channel structure; if the force transmission component 1-4 is an H-shaped steel, then node reinforcement 1-1-1 is an inverted H-shaped structure. Its sides are welded to sequence 1-1, and its upper and lower parts are welded to the ends of the force transmission component 1-4. Figure 5 The diagram shows the node structure of the intermediate layer of the shell. The node structure between the force transmission component 1-4 and the catalyst support beam 1-2 is composed of a T-shaped reinforcing member 1-2-1. The T-shaped reinforcing member 1-2-1 is composed of several plates with a T-shaped cross-section. The side is welded to the catalyst support beam 1-2, and the top is welded to the end of the force transmission component 1-4 to ensure smooth load transmission. The inner side of the force transmission component 1-4 and the inner side of the catalyst support beam 1-2 are fixedly connected to the shell wall panel 1-3. The four corners of the shell wall panel 1-3 are fixedly connected to the inner side of the force transmission component 1-4 by rectangular plates 1-3-1. The rectangular plates 1-3-1 are welded to the force transmission component 1-4 to ensure the reliability of the reinforcing ribs on the force transmission component 1-4 and the shell wall panel 1-3. The bottom of the shell wall panel 1-3 is fixedly connected to the top of the shell support beam 1-1.

[0037] Reference Figure 7The horizontal direction limiting block 3 is fixedly connected to the outside of the shell support beam 1-1, and the outside support beam is fixedly connected to the outside of the horizontal direction limiting block 3. The outside support beam is a frame composed of horizontal and vertical beams supporting the multilayer shell from the outside. The shell support beam 1-1 is placed on the outside support beam at both ends without welding, so as to release the thermal stress. The horizontal direction limiting block 3 comprises a stop block assembly 3-1. The stop block assembly 3-1 is provided with two groups, which are symmetrically arranged. The stop block assembly 3-1 is fixedly connected to the inside of the outside support beam. The stop block assembly 3-1 is internally and slidably connected to a limiting assembly 3-2. The limiting assembly 3-2 is fixedly connected to the outer periphery of the shell support beam 1-1. The stop block assembly 3-1 is composed of a plurality of triangular plates and a profile steel. The limiting assembly 3-2 is composed of a plurality of triangular plates and a profile steel. The stop block assembly 3-1 and the limiting assembly 3-2 are not welded, and an expansion gap is reserved therebetween.

[0038] Referring to Figures 1-3 The support plate 7-1 is fixedly connected to the bottom of the shell support beam 1-1. The support plate 7-1 is provided with a plurality of groups, which are evenly arranged at the bottom of the shell support beam 1-1. The interval can be set to 500mm-2000mm. The thickness of the support plate 7-1 is greater than 5mm. The size a is 10mm-200mm. The size b is 10mm-1000mm. The inside of the support plate 7-1 is fixedly connected to the wall plate of the shell outlet flue 4. The inside of the shell outlet flue 4 is fixedly connected to a connecting plate 7-2. The connecting plate 7-2 is a folded plate. The folding angle a is determined according to the included angle between the reaction shell outlet flue 4 and the catalyst shell 1. The connecting plate 7-2 is distributed on the outside of the shell. The single-side folded edge length L is 50mm-500mm. The outside upper part of the connecting plate 7-2 is fixedly connected to the inside of the shell support beam 1-1. The reaction shell outlet flue is fixedly connected to the top of the shell support beam 1-1. The support plate 7-1 and the connecting plate 7-2 make the lowermost catalyst shell 1 and the heat exchanger shell 5 and the ash bucket 6 not disconnected without expansion joint 2. The lower catalyst shell 1 is integrated with the heat exchanger shell 5 and the ash bucket 6. All loads are transmitted to the outside support beam by the lower shell support beam.

[0039] Referring to Figure 2 and Figure 4, the catalyst support beam 1-2 is provided with two groups, which divides the shell wall plate 1-3 into three parts, the upper layer shell wall plate 1-3 is provided with a common installation door 1-5, the uppermost common installation door 1-5 is not subjected to catalyst load, so it does not need to be reinforced, the lower layer shell wall plate 1-3 is provided with an installation door reinforcing assembly 1-6, the installation door reinforcing assembly 1-6 comprises a door column reinforcing piece 1-6-2, the door column reinforcing piece 1-6-2 is fixedly connected to the front surface of the shell wall plate 1-3, the door column reinforcing piece 1-6-2 is fixedly connected to the top of the catalyst support beam 1-2, the top of the door column reinforcing piece 1-6-2 is fixedly connected with a door beam reinforcing piece 1-6-3, the top of the door beam reinforcing piece 1-6-3 is fixedly connected with an inclined bracing piece 1-6-4, the back surface of the inclined bracing piece 1-6-4 is fixedly connected to the bottom of the catalyst support beam 1-3, the inclined bracing piece 1-6-4 can transmit the catalyst load on the catalyst support beam 1-3, the bottom of the door beam reinforcing piece 1-6-3 and the inner side of the door column reinforcing piece 1-6-2 are provided with a reinforcing door 1-6-1, the bottom of the door column reinforcing piece 1-6-2 is fixedly connected with a bottom reinforcing piece 1-6-5, the back surface of the middle layer bottom reinforcing piece 1-6-5 is fixedly connected to the side surface of the catalyst support beam 1-2, the back surface of the bottom layer bottom reinforcing piece 1-6-5 is fixedly connected to the side surface of the shell support beam 1-1, the bottom reinforcing piece 1-6-5 is used to reinforce the root node of the door column reinforcing piece 1-6-2, improve the structural safety, finally transmit the catalyst load to the shell support beam 1-1.

[0040] Working principle: when the catalyst is added to the inside of the catalyst shell 1, the load generated by the catalyst is transmitted to the catalyst support beam 1-2, and then to the force transmission piece 1-4, the force transmission piece 1-4 corresponds to the catalyst support beam 1-2 one by one, directly transmits the load, and then the load is transmitted to the shell support beam 1-1 through the force transmission piece 1-4, which transmits the catalyst load in the form of beam-to-beam, simplifies and clarifies the transmission of catalyst load, at the same time, the load of the reactor shell outlet flue 4, the heat exchanger shell 5 and the ash bucket 6 is transmitted to the shell support beam 1-1 through the support plate piece 7-1 and the connecting plate piece 7-2, and then to the external support beam, thereby reducing the amount of steel. At the same time, the catalyst support beam 1-2 transmits the load to the inclined bracing piece 1-6-4, which transmits the load to the bottom reinforcing piece 1-6-5 through the door column reinforcing piece 1-6-2, and finally to the shell support beam 1-1, thereby reducing the stress of the reinforcing door 1-6-1. When the reactor is working, due to the adoption of layered series arrangement, the height of single shell is reduced, the stress of the bottom shell support beam 1-1 of each layer is reduced, and the longitudinal thermal expansion amount is reduced, thereby the setting of the support beam and the expansion joint 2 can be reduced.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A multi-shell structure of an SCR De-NOx reactor, comprising a catalyst shell (1), characterized in that: The catalyst shell (1) is provided with multiple groups, two groups of the catalyst shell (1) are connected by setting expansion joints (2) therebetween, the bottom of the lowermost catalyst shell (1) is fixedly connected with a reaction shell outlet flue (4), the bottom of the reaction shell outlet flue (4) is fixedly connected with a heat exchanger shell (5), the bottom of the heat exchanger shell (5) is fixedly connected with an ash hopper (6), the catalyst shell (1) comprises a shell support beam (1-1), the outer side of the shell support beam (1-1) is fixedly connected with a horizontal direction limiting block (3), the outer side of the horizontal direction limiting block (3) is fixedly connected with an outer side support beam, the top of the shell support beam (1-1) is fixedly connected with a force transmission member (1-4) through a node reinforcing member (1-1-1), the inner side of the force transmission member (1-4) is fixedly connected with a catalyst support beam (1-2) through a T-shaped reinforcing member (1-2-1), the inner side of the force transmission member (1-4) and the inner side of the catalyst support beam (1-2) are fixedly connected with a shell wall plate (1-3), and the bottom of the shell wall plate (1-3) is fixedly connected to the top of the shell support beam (1-1).

2. The multi-layer shell structure of the SCR denitration reactor according to claim 1, characterized in that: The catalyst support beam (1-2) is provided with two groups, which divide the shell wall plate (1-3) into three parts, the front of the upper shell wall plate (1-3) is provided with a common installation door (1-5), and the front of the lower shell wall plate (1-3) is provided with an installation door reinforcing assembly (1-6); the installation door reinforcing assembly (1-6) comprises a door column reinforcing member (1-6-2), the door column reinforcing member (1-6-2) is fixedly connected to the front of the shell wall plate (1-3), the door column reinforcing member (1-6-2) is fixedly connected to the top of the catalyst support beam (1-2), the top of the door column reinforcing member (1-6-2) is fixedly connected with a door beam reinforcing member (1-6-3), the top of the door beam reinforcing member (1-6-3) is fixedly connected with an inclined bracing member (1-6-4), the bottom of the door beam reinforcing member (1-6-3) and the inner side of the door column reinforcing member (1-6-2) are provided with a reinforcing door (1-6-1), and the bottom of the door column reinforcing member (1-6-2) is fixedly connected with a bottom reinforcing member (1-6-5).

3. The multi-layer shell structure of the SCR denitration reactor according to claim 1, characterized in that: The horizontal direction limiting block (3) comprises a stop block assembly (3-1), the stop block assembly (3-1) is fixedly connected to the inner side of the outer support beam, the stop block assembly (3-1) is slidably connected with a limiting assembly (3-2) inside, and the limiting assembly (3-2) is fixedly connected to the outer periphery of the shell support beam (1-1).

4. The multi-layer shell structure of an SCR denitration reactor according to claim 3, characterized in that: The stop block assembly (3-1) is composed of a plurality of triangular plates and a profile steel, and the limiting assembly (3-2) is composed of a plurality of triangular plates and a profile steel.

5. The multi-layer shell structure of an SCR denitration reactor according to claim 1, characterized in that: The bottom of the lowermost shell support beam (1-1) is fixedly connected with a support plate member (7-1), the inner side of the support plate member (7-1) is fixedly connected to the wall plate of the shell outlet flue (4), the inner side of the shell outlet flue (4) is fixedly connected with a connecting plate member (7-2), and the top end of the reaction shell outlet flue (4) is fixedly connected to the shell support beam (1-1).

6. The multi-layer shell structure of an SCR denitration reactor according to claim 5, characterized in that: The connecting plate member (7-2) is a folded plate, and the outer upper side of the connecting plate member (7-2) is fixedly connected to the inner side of the shell support beam (1-1).

7. The multi-layer shell structure of an SCR denitration reactor according to claim 1, characterized in that: The shell wall plate (1-3) is fixedly connected to the inner side of the force transmission member (1-4) at the four corners through a rectangular plate (1-3-1). 8.The multi-layer shell structure of an SCR denitration reactor according to claim 2, characterized in that: The back of the inclined support member (1-6-4) is fixedly connected to the bottom of the upper catalyst support beam (1-2), the back of the middle bottom reinforcing member (1-6-5) is fixedly connected to the side of the catalyst support beam (1-2), and the back of the bottom bottom reinforcing member (1-6-5) is fixedly connected to the side of the shell support beam (1-1).

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