SCR (Selective Catalytic Reduction) reactor

Abstract

The utility model discloses an SCR (Selective Catalytic Reduction) reactor, which comprises a shell, a gas inlet and a gas outlet which are arranged at two ends of the shell, and a plurality of catalyst layers arranged in the shell, a support rod is arranged in the shell, a plurality of first connecting parts are arranged on the support rod, a plurality of second connecting parts are arranged on the plurality of catalyst layers, and the first connecting parts and the second connecting parts are arranged on the shell. A fastener for fixing the supporting rod and the catalyst layer is arranged between the first connecting part and the second connecting part in a penetrating manner. The SCR reactor solves the problems that in an existing SCR reactor, a catalyst and a shell are difficult to disassemble, the catalyst is inconvenient to replace, and the position of the catalyst is inconvenient to adjust.

Description

Technical Field

[0001] This utility model relates to the field of denitrification equipment, and in particular to an SCR reactor. Background Technology

[0002] Currently, the main flue gas denitrification process uses the SCR (Selective Catalytic Reduction) process, which employs liquid ammonia as the denitrification reducing agent. Ammonia selectively catalytically reduces NOx into environmentally harmless N2 and H2O. In SCR technology, flue gas and ammonia are thoroughly mixed and then passed through a catalyst (high-temperature catalyst) within a temperature range of 300-450℃. Under the action of the catalyst, NOx and NH3 in the flue gas undergo a redox reaction, producing nitrogen and water, thus completing the denitrification process.

[0003] In traditional SCR reactors, the catalyst is typically installed to the shell using welding or riveting. This method makes disassembly difficult when catalyst replacement is needed, increasing maintenance costs and time. Furthermore, traditional installation methods limit the flexibility of the catalyst bed, making it difficult to adjust the catalyst's position and distribution according to actual needs, thus affecting the denitrification effect. Utility Model Content

[0004] The main purpose of this invention is to provide an SCR reactor that solves the problems of difficult disassembly of the catalyst and shell, inconvenient catalyst replacement, and inconvenient adjustment of the catalyst position in existing SCR reactors.

[0005] To achieve the above objectives, this utility model proposes an SCR reactor, comprising:

[0006] The enclosure comprises an air inlet and an air outlet located at both ends of the enclosure, and multiple catalyst layers located inside the enclosure. A support rod is provided inside the enclosure, and the support rod has several first connecting parts. Multiple catalyst layers have several second connecting parts. Fasteners for fixing the support rod and the catalyst layers are passed through the first connecting parts and the second connecting parts.

[0007] Optionally, the fastener includes a bolt, a first baffle and a second baffle, the first connecting part has a groove, the second connecting part has a plug-in interface, the first baffle is disposed in the first connecting part, the second baffle is disposed in the second connecting part, and the bolt passes through the first baffle, the plug-in interface, the groove and the second baffle in sequence.

[0008] Optionally, multiple catalyst layers are installed within the housing along a direction perpendicular to the gas flow.

[0009] Optionally, the housing is provided with a plurality of guide vanes, which extend toward the air intake direction of the air inlet.

[0010] Optionally, multiple guide vanes are arranged in a fan shape within the housing.

[0011] Optionally, the top of the housing is provided with a detachably connected cover.

[0012] Optionally, the shell is provided with an inspection hole for maintenance and inspection of the internal structure of the reactor.

[0013] Optionally, the catalyst layer is configured as four, the four catalyst layers are arranged in a matrix, the support rod is configured as three, the three support rods are arranged in parallel, and two catalyst layers are installed between two adjacent support rods.

[0014] Optionally, the housing is arranged horizontally along the gas delivery direction.

[0015] Optionally, the diameter of the housing gradually decreases towards the air inlet and air outlet.

[0016] The beneficial effects of this utility model are as follows: it improves the installation structure of the catalyst and the shell in the existing SCR reactor. The second connection of the catalyst layer is detachably connected to the first connection of the support rod through fasteners, which simplifies the installation and disassembly process between the catalyst layer and the shell, and reduces maintenance costs and working time. The first connection of the support rod is provided with a groove. By sliding the fastener in the groove and fixing it in different positions, the position of the catalyst layer in the shell can be adjusted, thereby improving the utilization rate of the catalyst and the denitrification performance. Attached Figure Description

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the SCR reactor of this utility model;

[0019] Figure 2 This is an exploded view of the SCR reactor of this utility model;

[0020] Figure 3 This is a cross-sectional view of the SCR reactor of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the catalyst layer and the shell of this utility model;

[0022] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0023] Label Explanation:

[0024] 1. Housing; 2. Air inlet; 3. Air outlet; 4. Inspection hole; 5. Cover plate; 6. Catalyst layer; 61. Second connecting part; 611. Insertion interface; 7. Guide plate; 8. Support rod; 81. First connecting part; 811. Slide groove; 9. Fastener; 91. Bolt; 92. First baffle; 93. Second baffle;

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] One embodiment of this utility model provides an SCR reactor, with reference to... Figure 1 , Figure 2 ,include:

[0030] The housing 1 includes an air inlet 2 and an air outlet 3 located at both ends of the housing 1, and multiple catalyst layers 6 located inside the housing 1. A support rod 8 is provided inside the housing 1. The support rod 8 has several first connecting parts 81, and the multiple catalyst layers 6 have several second connecting parts 61. Fasteners 9 for fixing the support rod 8 and the catalyst layers 6 are passed between the first connecting parts 81 and the second connecting parts 61.

[0031] This embodiment improves the installation structure of the catalyst and shell 1 in the existing SCR reactor. The second connection part 61 of the catalyst layer 6 is detachably connected to the first connection part 81 on the support rod 8 through the fastener 9, which simplifies the installation and disassembly process between the catalyst layer 6 and the shell 1, and reduces maintenance costs and working time. The first connection part 81 on the support rod 8 is provided with a groove 811. By sliding the fastener 9 in the groove 811 and fixing it in different positions, the position of the catalyst layer 6 in the shell 1 can be adjusted, thereby improving the utilization rate of the catalyst and the denitrification performance.

[0032] In this embodiment, the shell 1 is a rectangular metal cylinder with an air inlet 2 and an air outlet 3 at each end. The air inlet 2 is used to introduce flue gas containing nitrogen oxides, and the air outlet 3 is used to discharge clean flue gas treated by the catalyst layer 6. The shell 1 is made of a high-temperature wear-resistant material, capable of withstanding high-temperature and corrosive environments. The active material used in the catalyst layer 6 is a transition metal element, such as V2O5, WO3, and MoO3. The catalyst layer 6 is disposed inside the shell 1 and directly connected to it. This installation method makes the installation, inspection, and maintenance of the catalyst layer 6 more convenient, reducing the time and economic costs in the maintenance process.

[0033] Specifically, the first connecting part 81 and the second connecting part 61 are respectively provided. The support rod 8 and the catalyst layer 6 are firmly connected together by fastener 9 passing through the first connecting part 81 and the second connecting part 61, so as to ensure that there is no relative movement between them, so that the catalyst layer 6 is stably installed in the housing 1.

[0034] Furthermore, the fastener 9 includes a bolt 91, a first baffle 92 and a second baffle 93. The first connecting part 81 has a groove 811, and the second connecting part 61 has a connector 611. The first baffle 92 is located in the first connecting part 81, and the second baffle 93 is located in the second connecting part 61. The bolt 91 passes through the first baffle 92, the connector 611, the groove 811 and the second baffle 93 in sequence.

[0035] In this embodiment, bolt 91 is riveted to second baffle 93, and second baffle 93 is fixedly connected to second connecting part. First baffle 92 is installed on one side of first connecting part 81, and each first baffle 92 has a through hole for bolt 91 to pass through. When bolt 91 passes through groove 811 and first baffle 92, the nut at the tail of bolt 91 is tightened to make it tightly connected to first baffle 92, thereby achieving a fastening connection between the two connecting parts. When it is necessary to disassemble or replace catalyst layer 6, the nut at the tail of bolt 91 is loosened, and fastener 9 can be pulled out from groove 811 of first connecting part 81 without complicated disassembly process or tools. At the same time, the through hole design of first baffle 92 also ensures that bolt 91 can pass through stably and plays a limiting role, preventing bolt 91 from loosening or shifting during the tightening process. Furthermore, the design of the slide groove 811 allows the fastener 9 to be adjustable during installation. When the position of the catalyst layer 6 needs to be adjusted, the bolt 91 is loosened, allowing it to move left and right within the slide groove 811. Once the catalyst layer 6 is adjusted to the desired position, the bolt 91 is tightened to secure the catalyst layer 6. This adjustment method not only simplifies the installation and adjustment process of the catalyst layer 6 and improves work efficiency, but also ensures that the catalyst layer 6 can be maintained in the optimal working position, thereby improving the utilization efficiency of the catalyst and the denitrification performance.

[0036] Furthermore, multiple catalyst layers 6 are installed within the housing 1 perpendicular to the gas flow direction. In this embodiment, four catalyst layers 6 are provided, stacked in pairs. Two catalyst layers 6 form the first layer, and the other two catalyst layers 6 are stacked on top of the first layer to form the second layer. This multi-layered stacking increases the contact area and time between the flue gas and the catalyst, thereby improving denitrification efficiency. Moreover, the stacked arrangement of multiple catalyst layers 6 allows operators to directly remove the catalyst layer 6 from the support rod 8 by disassembling the fasteners 9 when replacement is needed, without requiring extensive disassembly of the entire reactor.

[0037] Furthermore, referring to Figure 3 The housing 1 is provided with a plurality of guide plates 7, which extend toward the air inlet 2 in the direction of air intake. Specifically, the guide plates 7 are located between the catalyst layer 6 and the air inlet 2, and are used to guide the gas to be evenly distributed on the catalyst layer 6, thereby improving the reaction efficiency and gas treatment effect.

[0038] Furthermore, multiple guide vanes 7 are distributed in a fan shape within the housing 1. The diameter of the housing 1 gradually decreases towards the air inlet 2 and the air outlet 3. Specifically, because the diameter of the housing 1 gradually decreases towards the air inlet 2 and the air outlet 3, there may be localized excessively high flow velocities during the gas entry process into the housing 1. By distributing the guide vanes 7 in a fan shape within the housing 1, the gas can be guided to enter the housing 1 more smoothly, reducing flow resistance and ensuring uniform gas distribution within the housing 1. This avoids insufficient reaction or equipment damage caused by excessively high or low localized flow velocities.

[0039] Furthermore, the top of the housing 1 is provided with a detachable cover plate 5. Specifically, the detachable cover plate 5 on the top of the housing 1 allows operators to easily replace and replenish the catalyst without disassembling or moving the entire equipment. Since different chemical reactions may require different types or quantities of catalyst, the detachable cover plate 5 allows operators to flexibly adjust the type and quantity of catalyst according to actual needs, eliminating the need for frequent shutdowns for equipment disassembly to add or replace catalyst, thus reducing equipment time costs and improving production efficiency. In this embodiment, the cover plate 5 on the top of the housing 1 can be connected to the housing 1 by screws, snap-fit ​​connections, or other methods.

[0040] Furthermore, the shell 1 is provided with an inspection hole 4 for maintenance and inspection of the internal structure of the reactor. In this embodiment, the inspection hole 4 is located on one side of the shell 1, making it convenient for maintenance personnel to inspect the internal components of the shell 1 through the inspection hole 4. The inspection hole 4 is equipped with a plug to prevent gas leakage or the entry of external contaminants during normal operation of the reactor.

[0041] Furthermore, four catalyst layers 6 are arranged in a matrix, and three support rods 8 are arranged in parallel, with two catalyst layers 6 installed between adjacent support rods 8. Specifically, the support rods 8 are welded inside the housing 1, with two support rods 8 located on the left and right side walls of the housing 1, and the third support rod 8 located in the middle of the two support rods 8. When the catalyst layer 6 is connected to the support rod 8, the middle support rod 8 is located between two adjacent catalyst layers 6, which can seal the gap between the two adjacent catalyst layers 6 and prevent flue gas from flowing out from the gap between the two adjacent catalyst layers 6.

[0042] Furthermore, the housing 1 is horizontally arranged along the gas conveying direction. In this embodiment, the catalyst layer 6 is horizontally stacked inside the housing 1 along its width. This horizontal stacking allows for more catalyst layers 6 to be placed within a limited space, thereby increasing the equipment's processing capacity and making it easier to disassemble and install the catalyst layers 6. Because the catalyst layers 6 are horizontally placed, reactants can more easily reach the catalyst surface and react with it, contributing to improved reaction efficiency. Compared to the traditional vertical arrangement, the horizontal structure not only reduces the vertical height of the equipment but also decreases its footprint.

[0043] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An SCR reactor, characterized in that, include: The enclosure comprises an air inlet and an air outlet located at both ends of the enclosure, and multiple catalyst layers located inside the enclosure. A support rod is provided inside the enclosure, and the support rod has several first connecting parts. Multiple catalyst layers have several second connecting parts. Fasteners for fixing the support rod and the catalyst layers are passed through the first connecting parts and the second connecting parts.

2. The SCR reactor according to claim 1, wherein the fastener includes a bolt, a first baffle and a second baffle, the first connecting part has a groove, the second connecting part has an insertion interface, the first baffle is disposed at the first connecting part, the second baffle is disposed at the second connecting part, and the bolt passes through the first baffle, the insertion interface, the groove and the second baffle in sequence.

3. The SCR reactor according to claim 1, characterized in that, Multiple catalyst layers are installed inside the housing perpendicular to the gas flow direction.

4. The SCR reactor according to claim 1, characterized in that, The housing is provided with multiple guide plates, which extend toward the air intake direction of the air inlet.

5. The SCR reactor according to claim 4, characterized in that, Multiple of the aforementioned guide vanes are distributed in a fan shape within the housing.

6. The SCR reactor according to claim 1, characterized in that, The top of the housing is provided with a detachable cover plate.

7. The SCR reactor according to claim 6, characterized in that, The shell is provided with inspection holes for maintaining and inspecting the internal structure of the reactor.

8. The SCR reactor according to claim 1, characterized in that, The catalyst layer is configured as four, and the four catalyst layers are arranged in a matrix. The support rod is configured as three, and the three support rods are arranged in parallel. Two catalyst layers are installed between two adjacent support rods.

9. The SCR reactor according to claim 1, characterized in that, The casing is horizontally positioned along the gas delivery direction.

10. The SCR reactor according to claim 1, characterized in that, The diameter of the housing gradually decreases towards the air inlet and air outlet.

Images