SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The invention relates to the technical field of flue gas treatment equipment, and provides an SCR denitration reactor which comprises a reactor shell, the top and the bottom of the reactor shell are connected with a smoke inlet pipe and a smoke outlet pipe respectively, and a plurality of catalyst layers are arranged in an inner cavity of the reactor shell from top to bottom in a supporting mode; a pulse injection assembly corresponding to the catalyst layer is arranged in the reactor shell; the side surface of the reactor shell is communicated with a plurality of discharge pipes corresponding to the plurality of catalyst layers, and the discharge pipes are positioned below the corresponding catalyst layers; a dust baffle is movably arranged in an inner cavity of the discharging pipe in a supported mode, and a driving assembly used for driving the dust baffle to move is further arranged in the discharging pipe. And when the pulse injection assembly performs soot blowing treatment on the catalyst layer, the driving assembly drives the baffle plate to slide into the reactor shell from the discharge pipe and block the lower part of the catalyst layer. The denitration reactor has the effect of improving the cleaning efficiency of the catalyst layer in the denitration reactor.

Description

Technical Field

[0001] The present application relates to the field of flue gas treatment equipment, and in particular to an SCR denitration reactor. Background Art

[0002] During the operation of the biomass combustion heating system, the flue gas generated by its combustion boiler when burning biomass usually contains a large amount of nitrogen oxides. In order to limit the direct emission of nitrogen oxides contained in the flue gas to pollute the air, the flue gas generated by the combustion boiler needs to be passed into the SCR denitrification reactor for treatment to remove nitrogen oxides in the flue gas.

[0003] In the related art, when the flue gas containing nitrogen oxides is treated by an SCR denitrification reactor, the flue gas mixed with a reducing agent (ammonia or urea) in advance is introduced into the SCR denitrification reactor through the smoke inlet pipe at the top of the SCR denitrification reactor. When the flue gas mixed with the reducing agent flows through the catalyst layer inside the SCR denitrification reactor, the reducing agent reacts with the nitrogen oxides in the flue gas under the action of the catalyst to generate harmless nitrogen and water, thereby achieving efficient removal of nitrogen oxides in the flue gas.

[0004] The flue gas produced by the combustion boiler usually carries a lot of dust impurities. When the dust impurities flow through the catalyst layer with the flue gas, they usually adhere to the catalyst layer inside the SCR denitrification reactor, which can easily cause the catalyst layer to be blocked, which has a great impact on the normal use of the subsequent catalyst layer. In order to reduce the impact of dust impurities on the normal use of the catalyst layer, Figure 1 Currently, a pulse spray assembly 3 is installed above the catalyst layer 2 in the SCR denitration reactor, and compressed air is blown to the catalyst layer 2 through the pulse spray assembly 3 regularly to blow away the dust adhering to the catalyst layer 2.

[0005] Regarding the above-mentioned related technologies, when the pulse spray assembly blows the dust impurities on the catalyst layer downward, the fallen dust impurities will directly settle on the catalyst layer below, causing secondary pollution. This phenomenon requires that in the actual cleaning process, the cleaning method must be adopted from top to bottom layer by layer, which greatly limits the cleaning efficiency of the catalyst layer and causes the SCR denitration reactor to be shut down for a relatively long time. Therefore, there is room for improvement. Summary of the invention

[0006] In order to improve the cleaning efficiency of the catalyst layer inside the SCR denitration reactor, the present application provides an SCR denitration reactor.

[0007] The present application provides an SCR denitration reactor, which adopts the following technical solution: An SCR denitration reactor comprises a reactor shell, wherein the top and bottom of the reactor shell are respectively connected to a smoke inlet pipe and a smoke outlet pipe, and the inner cavity of the reactor shell is supported with a plurality of catalyst layers from top to bottom; and a pulse spray assembly is supported inside the reactor shell corresponding to the catalyst layers; A plurality of discharge pipes are connected to the side of the reactor shell corresponding to the plurality of catalyst layers, and the discharge pipes are located below the corresponding catalyst layers; a dust shield is movably supported in the inner cavity of the discharge pipe, and a driving component for driving the dust shield to move between the reactor shell and the discharge pipe is also provided in the discharge pipe; When the pulse jet assembly performs soot blowing on the catalyst layer, the driving assembly drives the dust shield to slide from the discharge pipe into the inner cavity of the reactor shell and shield under the catalyst layer.

[0008] By adopting the above technical solution, when the corresponding catalyst layer in the reactor shell is cleaned by the pulse spray assembly, the driving assembly first drives the dust shield to slide out of the inner cavity of the discharge pipe and move to the inner cavity of the reactor shell, so that the dust shield is blocked under the corresponding catalyst layer; then the pulse spray assembly performs a purge operation on the catalyst layer, and the dust and impurities on the catalyst layer are blown off by the airflow sprayed by the pulse spray assembly and enter the discharge pipe with the airflow under the action of the dust shield; after the catalyst layer is cleaned, the driving assembly drives the corresponding baffle to slide into the discharge pipe to restore the normal flow path of the flue gas in the reactor shell; due to the existence of the dust shield, the dust and impurities generated by cleaning the catalyst layer are effectively limited to contaminate the lower catalyst layer, thereby effectively avoiding the problem of secondary pollution. Compared with the traditional cleaning method of cleaning the catalyst layer layer by layer from top to bottom, it can realize the simultaneous cleaning of different catalyst layers, reduce equipment downtime, and effectively improve the cleaning efficiency of the catalyst layer inside the denitrification reactor.

[0009] Preferably, a sealing plate is vertically connected to one end of the dust shield plate facing the reactor shell; When the driving assembly drives the dust shield to move into the discharge pipe, the sealing plate blocks the connection between the discharge pipe and the reactor shell.

[0010] By adopting the above technical solution, the sealing plate can block the connection between the discharge pipe and the reactor shell when the dust shield plate is moved into the discharge pipe, effectively preventing the flue gas to be treated from leaking from the connection between the discharge pipe and the reactor shell, ensuring that the SCR denitrification reactor remains airtight under normal working conditions, which is beneficial to improving the stability and safety of the system.

[0011] Preferably, a blowing assembly is supported on one side of the dust shield facing the discharge pipe, the blowing assembly includes a blowing pipe, and the blowing pipe is connected to an air source; a plurality of air nozzles are connected to the periphery of the blowing pipe, and the air nozzles are arranged toward the inner cavity of the discharge pipe.

[0012] By adopting the above technical solution, when the dust shield moves to the inner cavity of the reactor shell and blocks the corresponding catalyst layer under the discharge pipe, the blowing assembly blows compressed air toward the discharge pipe to accelerate the dust-containing airflow generated by the pulse spray assembly to clean the catalyst layer into the discharge pipe, which is beneficial to reduce the dust and impurities blown off from spreading in the inner cavity of the reactor shell and re-contaminating and adhering to the catalyst layer; when the dust shield is in the discharge pipe, the blowing assembly blows compressed air to the inner cavity of the discharge pipe to clean the dust and impurities remaining in the discharge pipe, which is beneficial to reduce the accumulation of dust and impurities in the discharge pipe.

[0013] Preferably, it further comprises a manifold, which is vertically supported on one side of the reactor shell, and the bottom end of the manifold is connected to the smoke outlet pipe; and the end of the discharge pipe away from the reactor shell is connected to the manifold.

[0014] By adopting the above technical solution, the dust-laden airflows discharged from each discharge pipe can be concentrated and discharged into the smoke outlet pipe, which is beneficial to reducing the secondary pollution problem caused by the random discharge of dust and impurities.

[0015] Preferably, a filter screen is supported at the bottom of the inner cavity of the manifold, and the filter screen is close to the connection between the manifold and the smoke outlet pipe.

[0016] By adopting the above technical solution, a filter is set at the connection point of the confluence pipe close to the smoke outlet pipe, and the filter is used to intercept and process dust and impurities entering the smoke outlet pipe with the airflow, so as to reduce the subsequent dust and impurities entering the smoke outlet pipe with the airflow, resulting in the accumulation of dust and impurities in the smoke outlet pipe.

[0017] Preferably, a support frame is provided in the inner cavity of the manifold, the support frame is formed with a mounting groove corresponding to the filter screen, the filter screen is embedded in the mounting groove, a socket is opened on the outer side of the manifold corresponding to the support frame, and the support frame passes through and closes the socket.

[0018] By adopting the above technical solution, the filter net is firmly supported in the inner cavity of the manifold by using a support frame, which is beneficial for the filter net to better intercept dust and impurities. Through the setting of the socket, the support frame can be removed from the manifold, making it convenient to remove the filter net from the manifold and clean it later, so as to restore the normal working ability of the filter net.

[0019] Preferably, the top of the conduit is opened, and a guide fan is installed at the open end of the top of the conduit, and the guide fan is arranged toward the filter screen.

[0020] By adopting the above technical solution, the guide fan is used to accelerate the air flow movement in the conduit, so that the dust-laden air flow entering the conduit through the discharge pipe can flow toward the filter faster, effectively preventing the dust from diffusing in the conduit, and helping the filter to better intercept the dust entrained in the air flow.

[0021] Preferably, a baffle is supported at the open end of the conduit, a gap is left between the baffle and the port of the open end of the conduit, and the projection of the baffle on the horizontal plane covers the projection of the open end of the conduit on the horizontal plane.

[0022] By adopting the above technical solution, the baffle is used to shield and protect the open end of the collector, which is helpful to reduce the subsequent rainwater and debris from entering the collector through the open end of the collector.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the pulse spraying assembly is performing soot blowing operation on the catalyst layer, the driving assembly drives the dust shield to move to the bottom of the catalyst layer, and the dust shield is used to block the dust airflow falling from the catalyst layer and guide the dust-containing airflow into the discharge pipe, which effectively avoids the dust-containing airflow generated by cleaning the catalyst layer from contaminating the catalyst layer below, and can realize the simultaneous cleaning of the catalyst layers inside the reactor shell, which significantly improves the cleaning efficiency of the catalyst layer inside the denitration reactor.

[0024] 2. By setting a sealing plate at one end of the dust shield facing the reactor shell, when the driving assembly drives the dust shield to move into the discharge pipe, the sealing plate at the end of the dust shield can block the connection between the discharge pipe and the reactor shell, thereby ensuring the sealing of the flue gas flow path inside the reactor and reducing the possibility of leakage of the flue gas to be treated.

[0025] 3. With the help of the blowing assembly arranged on the sealing plate, when the dust shield plate is in the discharge pipe, air can be blown through the blowing assembly to accelerate the discharge of dust and impurities in the discharge pipe; when the dust shield plate is located in the inner cavity of the reactor shell, air can be blown through the blowing assembly to quickly introduce the dust-laden airflow into the discharge pipe, effectively reducing the residence and diffusion of dust and impurities in the inner cavity of the reactor shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This application is used to illustrate the internal structure of the existing SCR denitrification reactor.

[0027] Figure 2 It is a schematic diagram of the overall structure of the SCR denitration reactor used in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the internal structure of the SCR denitration reactor used in the embodiment of the present application.

[0029] Figure 4 yes Figure 3 Enlarged schematic diagram of part A in the middle.

[0030] Figure 5 It is a schematic diagram of an embodiment of the present application used to illustrate the state in which the driving component drives the dust shield to block below the catalyst layer.

[0031] Figure 6 yes Figure 5 Enlarged schematic diagram of part B in the middle.

[0032] Figure 7 This is a schematic diagram of an embodiment of the present application for illustrating a state in which the support frame is moved out of the manifold.

[0033] Figure 8 It is a schematic diagram used to illustrate the connection relationship between the support frame and the filter screen in an embodiment of the present application.

[0034] Description of reference numerals: 1. Reactor shell; 11. Smoke inlet pipe; 12. Smoke outlet pipe; 2. Catalyst layer; 3. Pulse spray assembly; 4. Discharge pipe; 40. Driving cylinder; 41. Dust shield; 42. Sealing plate; 43. Blowing pipe; 431. Air nozzle; 5. Manifold; 51. Filter; 52. Support frame; 521. Mounting slot; 53. Sliding cylinder; 531. Connector; 54. Guide fan; 55. Baffle. DETAILED DESCRIPTION

[0035] The following is combined with Figure 2-8 This application is described in further detail.

[0036] The present application embodiment discloses an SCR denitration reactor, referring to Figure 2 and Figure 3 , including a reactor shell 1, a smoke inlet pipe 11 and a smoke outlet pipe 12, the smoke inlet pipe 11 and the smoke outlet pipe 12 are respectively connected to the top and the bottom of the reactor shell 1; a plurality of catalyst layers 2 are supported in sequence from top to bottom in the inner cavity of the reactor shell 1, and a pulse injection assembly 3 is also provided in the reactor shell 1 corresponding to the catalyst layer 2, the pulse injection assembly 3 is located above the corresponding catalyst layer 2, and is used for blowing and cleaning the catalyst layer 2; a plurality of discharge pipes 4 are vertically connected to the outer side of the reactor shell 1 corresponding to the plurality of catalyst layers 2; the connection point between the discharge pipe 4 and the reactor shell 1 is located below the corresponding catalyst layer 2; a dust shield 41 is movably supported in the discharge pipe 4; a driving assembly is also provided in the discharge pipe 4, and the driving assembly is used to drive the dust shield 41 to move between the inner cavity of the reactor shell 1 and the discharge pipe 4.

[0037] When the SCR denitration reactor is operating normally, the driving component drives the dust shield 41 to slide into the inner cavity of the discharge pipe 4 to maintain the normal airflow path inside the reactor shell 1. When the catalyst layer 2 is cleaned by the pulse cleaning component, the driving component drives the dust shield 41 to move from the discharge pipe 4 to the inner cavity of the reactor shell 1 and block it below the corresponding catalyst layer 2, so that the dust-containing airflow blown off the catalyst layer 2 by the pulse cleaning component can enter the discharge pipe 4 through the dust shield 41; the dust-containing airflow being cleaned is limited from contaminating the catalyst layer 2 below, so that the corresponding catalyst layer 2 can be cleaned simultaneously by the pulse cleaning components at various locations.

[0038] The pulse cleaning assembly includes a plurality of blowing pipes supported above the catalyst layer 2, the blowing pipes are connected to an external air source through a pulse valve, and a plurality of nozzles are installed on the periphery of the blowing pipes, and the nozzles are all arranged toward the corresponding catalyst layer 2. During cleaning, the blowing pipes blow compressed air toward the corresponding catalyst layer through the nozzles to blow away the dust and impurities adhering to the inside of the catalyst layer 2 downwards.

[0039] Reference Figure 2 and Figure 3 A manifold 5 is also supported on one side of the reactor shell 1. The manifold 5 is vertically arranged and the bottom end of the manifold 5 is connected to the smoke outlet pipe 12. The end of the discharge pipe 4 away from the reactor shell 1 is connected to the manifold 5. The dust-laden airflow discharged through the discharge pipe 4 can be discharged into the smoke outlet pipe 12 after being converged through the manifold 5.

[0040] Reference Figure 3 and Figure 4 The bottom of the dust shield 41 is arranged to fit the bottom wall of the discharge pipe 4. A sealing plate 42 is vertically connected to one end of the dust shield 41 facing the inner cavity of the reactor shell 1; when the driving assembly drives the dust shield 41 to reset and slide into the inner cavity of the discharge pipe 4, the sealing plate 42 at the end of the dust shield 41 is embedded in the pipe mouth end of the discharge pipe 4 close to one end of the reactor shell 1 to block the connection between the discharge pipe 4 and the reactor shell 1, and limit the leakage of the flue gas to be treated entering the reactor shell 1 through the connection between the discharge pipe 4 and the reactor shell 1, which is conducive to maintaining the sealing of the flue gas flow path inside the reactor shell 1.

[0041] Reference Figure 3 and Figure 4 The driving assembly includes two horizontally arranged driving cylinders 40, and the two driving cylinders 40 are respectively installed on the opposite side walls of the inner cavity of the discharge pipe 4 through supports. The driving cylinders 40 are both arranged toward the inner cavity of the reactor, and the piston rod ends of the driving cylinders 40 are connected to the sealing plate 42; subsequently, the dust shield plate 41 and the sealing plate 42 are driven by the driving cylinders 40 to move between the inner cavity of the reactor shell 1 and the discharge pipe 4.

[0042] Reference Figure 4 and Figure 6A blowing assembly is installed on the side of the sealing plate 42 facing the inner cavity of the discharge pipe 4, and the blowing assembly includes a blowing pipe 43. The blowing pipe 43 is fixed to the sealing plate 42 through a plurality of pipe clamps. The blowing pipe 43 is connected to an air source. The outer periphery of the blowing pipe 43 is connected to a plurality of air nozzles 431, and the air nozzles 431 are all arranged toward the inner cavity of the discharge pipe 4.

[0043] When the dust shield 41 is located below the corresponding catalyst layer 2, the blowing assembly continuously blows air toward the discharge pipe 4 to accelerate the dust-containing airflow generated by cleaning the catalyst layer 2 and accelerate it into the discharge pipe 4, thereby reducing the dust-containing airflow from spreading in the inner cavity of the reactor shell 1, causing the dust-containing airflow to re-contaminate the adhered catalyst layer 2.

[0044] When the dust shield plate 41 is located in the inner cavity of the discharge pipe 4 and the sealing plate 42 blocks the connection between the reactor shell 1 and the discharge pipe 4, the blowing assembly blows air toward the discharge pipe 4 to accelerate the dust-laden airflow to be discharged into the manifold 5 through the discharge pipe 4, which helps to reduce the accumulation of dust and impurities inside the discharge pipe 4.

[0045] Reference Figure 3 and Figure 7 A filter screen 51 is provided at the bottom of the confluence pipe 5, and the filter screen 51 is located below the discharge pipe 4 and is arranged close to the smoke outlet pipe 12. The filter screen 51 is used to intercept dust impurities in the dust-laden airflow flowing through the confluence pipe 5, so as to limit the airflow from carrying dust impurities into the smoke outlet pipe 12, and reduce the accumulation of dust impurities in the smoke outlet pipe 12, which makes it difficult to clean the smoke outlet pipe 12 later.

[0046] Reference Figure 7 and Figure 8 The inner cavity of the manifold 5 corresponds to the filter 51 and supports a support frame 52. The support frame 52 is provided with a mounting groove 521 for the filter 51 to be embedded. The filter 51 is embedded in the mounting groove 521 of the support frame 52. The outer side of the manifold 5 corresponds to the support frame 52 and is provided with a socket. The socket is connected to the inner cavity of the manifold 5. The support frame 52 penetrates and blocks the socket. The outer side of the manifold 5 is provided with a sliding drive member, which is used to drive the support frame 52 to slide along the socket. Specifically, the sliding drive member includes a sliding cylinder 53 installed on the outer side of the manifold 5. The piston rod end of the sliding cylinder 53 is connected to the side of the support frame 52 extending out of the socket through a connecting member 531. Through the above arrangement, the filter 51 can be firmly supported in the inner cavity of the manifold 5, and the support frame 52 can be driven by the sliding cylinder 53 to drive the filter 51 to slide out of the manifold 5, so as to better clean the dust and impurities intercepted by the filter 51 and restore the normal filtering function of the filter 51.

[0047] The top of the conduit 5 is opened to form an open end, and a guide fan 54 is embedded in the open end of the conduit 5. The guide fan 54 is arranged toward the filter screen 51 at the bottom of the conduit 5, and the connection between the conduit 5 and the discharge pipe 4 is located below the guide fan 54. When cleaning the catalyst layer 2 later, the guide fan 54 can be used to blow air toward the filter screen 51 to limit the dust-containing airflow entering the conduit 5 through the discharge pipe 4 and flow upward, while accelerating the dust-containing airflow to flow toward the filter screen 51 at the bottom of the conduit 5, which is conducive to the filter screen 51 to better intercept dust impurities in the dust-containing airflow.

[0048] The top open end of the manifold 5 is also supported with a baffle 55, which is located above the top open end of the manifold 5 and has a gap with the open end of the manifold 5. The projection of the baffle 55 on the horizontal plane covers the projection of the manifold 5 on the horizontal plane; the bottom of the baffle 55 is welded to the outside of the manifold 5 through a number of connecting rods to achieve a stable installation of the baffle 55 on the top of the manifold 5. The baffle 55 is used to shield and protect the open end of the manifold 5 to limit the subsequent rainwater and debris from entering the open end through the open end of the manifold 5. The baffle 55 is in the shape of a cone with the tip facing upward, so that the baffle 55 can better guide the rainwater and debris, which is conducive to reducing the residue of rainwater and debris on the baffle 55.

[0049] The implementation principle of the embodiment of the present application is: When the denitrification reactor is operating normally, the driving assembly in the discharge pipe 4 drives the dust shield plate 41 to slide into the discharge pipe 4, and drives the sealing plate 42 at the end of the dust shield plate 41 to seal the connection between the discharge pipe 4 and the reactor shell 1, so as to keep the flue gas flow path inside the reactor shell 1 unobstructed.

[0050] When the corresponding catalyst layer 2 is cleaned by the pulse spraying assembly 3, the driving assembly in the discharge pipe 4 drives the dust shield 41 to slide from the inner cavity of the discharge pipe 4 into the inner cavity of the reactor shell 1, and blocks the corresponding catalyst layer 2. Thereafter, the catalyst layer 2 is sprayed and cleaned by the pulse spraying assembly 3. The dust-containing airflow generated by cleaning the catalyst layer 2 flows into the discharge pipe 4 under the limitation of the dust shield 41, and is merged into the manifold 5 through the discharge pipe 4, and finally enters the smoke outlet pipe 12 after the dust impurities are intercepted by the filter net 51 at the bottom of the manifold 5.

[0051] The present application can realize the simultaneous cleaning of each catalyst layer 2 inside the denitration reactor, without the need to clean each catalyst layer 2 layer by layer from top to bottom, thereby effectively improving the cleaning efficiency of the catalyst layer 2 inside the denitration reactor.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An SCR denitration reactor, comprising a reactor shell (1), wherein the top and bottom of the reactor shell (1) are respectively connected to a smoke inlet pipe (11) and a smoke outlet pipe (12), and the inner cavity of the reactor shell (1) is supported with a plurality of catalyst layers (2) from top to bottom; a pulse injection assembly (3) is supported inside the reactor shell (1) corresponding to the catalyst layers (2); and the characteristics are: The reactor shell (1) is connected to a plurality of discharge pipes (4) on the side surface thereof corresponding to the plurality of catalyst layers (2), and the discharge pipes (4) are located below the corresponding catalyst layers (2); a dust shield (41) is movably supported in the inner cavity of the discharge pipe (4), and a driving component for driving the dust shield (41) to move between the reactor shell (1) and the discharge pipe (4) is also provided in the discharge pipe (4); when the pulse jet component (3) performs soot blowing on the catalyst layer (2), the driving component drives the dust shield (41) to slide from the discharge pipe (4) into the inner cavity of the reactor shell (1) and shield the catalyst layer (2) below.

2. The SCR denitration reactor according to claim 1, characterized in that: A sealing plate (42) is vertically connected to one end of the dust shield plate (41) facing the reactor shell (1); When the driving component drives the dust shield plate (41) to move into the discharge pipe (4), the sealing plate (42) blocks the connection between the discharge pipe (4) and the reactor shell (1).

3. The SCR denitration reactor according to claim 2, characterized in that: A blowing assembly is supported on one side of the dust shield (41) facing the discharge pipe (4), and the blowing assembly includes a blowing pipe (43), and the blowing pipe (43) is connected to an air source; a plurality of air nozzles (431) are connected to the periphery of the blowing pipe (43), and the air nozzles (431) are arranged toward the inner cavity of the discharge pipe (4).

4. The SCR denitration reactor according to claim 1, characterized in that: It also comprises a manifold (5), the manifold (5) being vertically supported on one side of the reactor shell (1), the bottom end of the manifold (5) being connected to the smoke outlet pipe (12); and the end of the discharge pipe (4) away from the reactor shell (1) is connected to the manifold (5).

5. The SCR denitration reactor according to claim 4, characterized in that: A filter screen (51) is supported at the bottom of the inner cavity of the confluence pipe (5), and the filter screen (51) is close to the connection between the confluence pipe (5) and the smoke outlet pipe (12).

6. The SCR denitration reactor according to claim 5, characterized in that: The inner cavity of the manifold (5) is supported by a support frame (52), the support frame (52) is formed with a mounting groove (521) corresponding to the filter screen (51), the filter screen (51) is embedded in the mounting groove (521), the outer side of the manifold (5) is provided with a socket corresponding to the support frame (52), and the support frame (52) penetrates and closes the socket.

7. The SCR denitration reactor according to claim 5, characterized in that: The conduit (5) is provided with an opening at the top, and a guide fan (54) is installed at the open end of the top of the conduit (5), and the guide fan (54) is arranged toward the filter screen (51).

8. The SCR denitration reactor according to claim 7, characterized in that: The open end of the conduit (5) is supported with a baffle (55), a gap is left between the baffle (55) and the open end of the conduit (5), and the projection of the baffle (55) on a horizontal plane covers the projection of the open end of the conduit (5) on a horizontal plane.

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