SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model relates to an SCR (Selective Catalytic Reduction) denitration reactor which comprises a reactor main body, and a smoke inlet pipeline is fixedly connected above the reactor main body. According to the SCR denitration reactor, the fan blade base and the wind resistance fan blades are arranged, firstly, circulating airflow in a pipeline is matched with the fan blade base and the wind resistance fan blades, rotating rods on two bearings can stably rotate, and then the rotating rods stably rotate, so that a plurality of fixing blocks on rod bodies of the rotating rods can stably rotate as well; then the extension rods on the two sides of the fixed block are driven to move through stable rotation of the fixed block, at the moment, the two extension rods can move with the fixed block as the circle center, and finally through arranged brushes, the two extension rods move, and meanwhile the brushes above the extension rods can clean the rectification grid assembly; dust in the pipeline can be effectively prevented from blocking the rectifying grid assembly, meanwhile, the mixing efficiency of flue gas and ammonia gas can be effectively improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration reactors, in particular to an SCR denitration reactor. Background Art

[0002] The SCR flue gas denitrification system is a system that uses selective catalytic reduction to denitrify flue gas. SCR flue gas denitrification technology refers to a technology that selectively reduces NOx in flue gas through a reducing agent in the presence of a catalyst and a reducing agent within a low temperature range (i.e., within 180-230°C) to generate N2 and water to reduce NOx emissions.

[0003] There are many types of SCR denitrification reactors currently available. For example, the Chinese patent number CN202223508854.X is an SCR denitrification reactor structure. The patent includes a reactor body, which includes a smoke inlet pipe, an ammonia spraying chamber, a reaction chamber, a recovery chamber and a smoke outlet pipe. The smoke inlet pipe is connected to the ammonia spraying chamber, the ammonia spraying chamber is located above the reaction chamber, the reaction chamber is located above the recovery chamber, and the recovery chamber is connected to the smoke outlet pipe. Its structure is simple, which can make the temperature distribution of the mixed flue gas uniform, thereby improving the stability of the denitrification system operation and improving the denitrification efficiency. However, since this patent is the same as most equipment, it cannot solve the problem of dust or impurities in the pipeline. If these dust or impurities are not handled, these substances will easily clog the flow holes on the catalyst surface, thereby affecting the catalytic efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides an SCR denitrification reactor, which has the advantage of being able to effectively clean impurities in the pipe, and solves the problem of being unable to remove dust or impurities in the pipe.

[0005] To achieve the above-mentioned purpose of effectively cleaning impurities in the pipe, the utility model provides the following technical solution: an SCR denitrification reactor, comprising a reactor body, a smoke inlet pipe fixedly connected to the upper part of the reactor body, a smoke exhaust pipe fixedly connected to the lower part of the reactor body, and a rectifying mechanism and an ammonia discharge device provided inside the smoke inlet pipe;

[0006] The rectification mechanism includes a rectification tube, the inner wall of the smoke inlet pipe is fixedly installed with the rectification tube, two fixing frames and four rectification grid assemblies are installed inside the rectification tube, the two fixing frames are fixedly installed with bearings, the inner walls of the two bearings are fixedly connected with a rotating rod, the top of the rotating rod is fixedly installed with a fan blade base, four wind resistance fan blades are fixedly installed on the fan blade base, four fixed blocks are fixedly installed on the fixing frame, extension rods are fixedly installed on the left and right sides of the fixed blocks, and a brush is bonded to the extension rod.

[0007] Furthermore, the outer wall of the smoke inlet pipe is connected to an ammonia delivery pipe, and the ammonia delivery pipe is connected to the ammonia discharge device through a pipe, and the connection relationship is a fixed connection. A plurality of ammonia discharge ports are fixedly installed on the bottom of the ammonia discharge device.

[0008] Furthermore, a denitration catalytic device is provided inside the reactor body, and a plurality of conical discharge ports are fixedly installed on the bottom of the denitration catalytic device.

[0009] Furthermore, a conical recovery reaction chamber is provided inside the reactor body and below the denitration catalytic device, and the bottom of the conical recovery reaction chamber is connected to the smoke exhaust pipe.

[0010] Furthermore, an electronic pressure control valve is provided on the outside of the smoke exhaust pipe, and a control component is provided on the front side of the reactor body.

[0011] Furthermore, the control component is composed of a display panel, a signal light and a control button, and the rectifying grid component is composed of a multi-grid plate and a flow diffusion guide plate.

[0012] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0013] 1. The SCR denitrification reactor is provided with a fixed frame, bearings, a rotating rod, a fan blade base and a wind resistance fan blade. First, the circulating airflow inside the pipeline cooperates with the fan blade base and the wind resistance fan blade to make the rotating rods on the two bearings rotate stably. Then, the rotating rod rotates stably, so that the multiple fixed blocks on the rod body can also rotate stably. Then, the stable rotation of the fixed block drives the extension rods on both sides to move. At this time, the two extension rods will move with the fixed block as the center of the circle. Finally, the brush is provided so that the two extension rods can move while the brush above them will clean the rectifier grid assembly, which can effectively prevent dust in the pipeline from clogging the rectifier grid assembly. At the same time, it can also effectively improve the mixing efficiency of flue gas and ammonia, and its practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a front cross-sectional view of the structure of the utility model;

[0016] Figure 3 This is a cross-sectional view of the rectifier mechanism of the present invention.

[0017] Figure 4 This is the top view of the rectifier grid assembly of the utility model

[0018] In the figure: 1. Reactor body; 2. Smoke inlet pipe; 3. Smoke exhaust pipe; 4. Rectifier mechanism; 401. Rectifier tube; 402. Fixing frame; 403. Bearing; 404. Rotating rod; 405. Fan blade base; 406. Wind resistance fan blade; 407. Fixing block; 408. Extension rod; 409. Rectifier grid assembly; 410. Brush; 5. Ammonia delivery pipe; 6. Ammonia discharge device; 7. Ammonia discharge port; 8. Denitrification catalytic device; 9. Conical discharge port; 10. Conical recovery reaction chamber; 11. Electronic pressure control valve; 12. Controller assembly. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-4 In this embodiment, an SCR denitration reactor includes a reactor body 1, a smoke inlet pipe 2 is fixedly connected to the upper portion of the reactor body 1, a smoke exhaust pipe 3 is fixedly connected to the lower portion of the reactor body 1, and a rectifying mechanism 4 and an ammonia emission device 6 are provided inside the smoke inlet pipe 2;

[0021] The rectifier mechanism 4 includes a rectifier tube 401, the inner wall of the smoke inlet pipe 2 is fixedly installed with the rectifier tube 401, the interior of the rectifier tube 401 is installed with two fixing frames 402 and four rectifier grid components 409, the two fixing frames 402 are fixedly installed with bearings 403, the inner walls of the two bearings 403 are fixedly connected with a rotating rod 404, the top of the rotating rod 404 is fixedly installed with a fan base 405, the fan base 405 is fixedly installed with four wind resistance fan blades 406, the fixing frame 402 is fixedly installed with four fixing blocks 407, the left and right sides of the fixing block 407 are fixedly installed with an extension rod 408, and the extension rod 408 is bonded with a brush 410. First, the circulating airflow inside the pipe cooperates with the fan base 405 and the wind resistance fan blade 406 to make the rotating rod 404 on the two bearings 403 rotate stably, and then the rotating rod 404 rotates stably, so that the multiple fixed blocks 407 on its rod body can also rotate stably, and then the stable rotation of the fixed block 407 drives the extension rods 408 on both sides to move. At this time, the two extension rods 408 will move with the fixed block 407 as the center of the circle. Finally, through the provided brush 410, the two extension rods 408 move while the brush 410 above them will clean the rectifier grid assembly 409, which can effectively prevent dust in the pipe from clogging the rectifier grid assembly 409, and at the same time, it can also effectively improve the mixing efficiency of the flue gas and ammonia, and its practicality is strong.

[0022] In the case implementation, the outer wall of the smoke inlet pipe 2 is connected to an ammonia delivery pipe 5, and the ammonia delivery pipe 5 is connected to the ammonia discharge device 6 through a pipe, and the connection relationship is a fixed connection. A plurality of ammonia discharge ports 7 are fixedly installed at the bottom of the ammonia discharge device 6. This design can not only provide sufficient ammonia for the device, but also form a circulating airflow through the discharge of multiple ammonia discharge ports 7. After the circulating airflow is formed, it can not only accelerate the mixing of flue gas and ammonia, but also accelerate the operation of the fan assembly on the rectifier mechanism 4.

[0023] In the case implementation, a denitration catalytic device 8 is provided inside the reactor body 1, and a plurality of conical discharge ports 9 are fixedly installed at the bottom of the denitration catalytic device 8. This design can effectively prevent the escape of the catalyzed gas.

[0024] In the case implementation, a conical recovery reaction chamber 10 is provided inside the reactor body 1 and below the denitrification catalytic device 8. The bottom of the conical recovery reaction chamber 10 is connected to the smoke exhaust pipe 3. This design makes it more fluid.

[0025] In the case implementation, an electronic pressure control valve 11 is provided on the outside of the smoke exhaust pipe 3, and a control component 12 is provided on the front side of the reactor body 1. The control component 12 and the electronic components in this patent are electrically connected through wires, so that it is convenient to operate the control component 12 to control the operation of the electronic components.

[0026] In the case implementation, the control component 12 consists of a display panel, signal lights and control buttons, and the rectifier grid component 409 consists of multiple grid plates and flow diffusion guide plates. This design can achieve uniform distribution of catalyst and ammonia in the reactor through the reasonable layout of the rectifier grid, thereby improving the utilization rate of ammonia.

[0027] During implementation, follow these steps:

[0028] 1) The airflow flowing through the pipe cooperates with the fan base 405 and the wind resistance fan blade 406 to enable the rotating rod 404 on the two bearings 403 to rotate stably;

[0029] 2) The rotating rod 404 is then stably rotated, so that the multiple fixed blocks 407 on the rod body can also stably rotate;

[0030] 3) The stable rotation of the fixed block 407 drives the extension rods 408 on both sides to move. At this time, the two extension rods 408 will move with the fixed block 407 as the center of the circle;

[0031] 4) Finally, by setting the brush 410, the two extension rods 408 can move while the brush 410 above them can clean the rectifier grid assembly 409, which can effectively prevent dust in the pipeline from clogging the rectifier grid assembly 409 and effectively improve the mixing efficiency of the flue gas and ammonia.

[0032] In summary, the SCR denitration reactor is provided with a fixing frame 402, a bearing 403, a rotating rod 404, a blade base 405 and a wind resistance blade 406. First, the circulating airflow inside the pipe cooperates with the blade base 405 and the wind resistance blade 406 to make the rotating rod 404 on the two bearings 403 rotate stably. Then, the rotating rod 404 rotates stably, so that the multiple fixed blocks 407 on the rod body can also rotate stably. Then, the stable rotation of the fixed block 407 drives the extension rods 408 on both sides to move. At this time, the two extension rods 408 will rotate with the fixed block 40 7 is the center of the circle and moves. Finally, the brush 410 is set so that the two extension rods 408 can clean the rectifying grid assembly 409 while moving, which can effectively prevent the dust in the pipeline from clogging the rectifying grid assembly 409. At the same time, it can also effectively improve the mixing efficiency of the flue gas and ammonia. It is highly practical and solves the problem that this patent, like most devices, cannot solve the problem of dust or impurities in the pipeline. If these dust or impurities are not handled, they will easily clog the flow holes on the catalyst surface, thereby affecting the catalytic efficiency.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An SCR denitration reactor, comprising a reactor body (1), characterized in that: A smoke inlet pipe (2) is fixedly connected to the upper portion of the reactor body (1), and a smoke exhaust pipe (3) is fixedly connected to the lower portion of the reactor body (1). A rectifying mechanism (4) and an ammonia exhaust device (6) are provided inside the smoke inlet pipe (2); The rectification mechanism (4) comprises a rectification tube (401), the rectification tube (401) is fixedly mounted on the inner wall of the smoke inlet pipe (2), two fixing frames (402) and four rectification grid assemblies (409) are mounted inside the rectification tube (401), bearings (403) are fixedly mounted on the two fixing frames (402), the inner walls of the two bearings (403) are fixedly connected with a rotating rod (404), a fan blade base (405) is fixedly mounted on the top of the rotating rod (404), four wind resistance fan blades (406) are fixedly mounted on the fan blade base (405), four fixed blocks (407) are fixedly mounted on the fixing frame (402), extension rods (408) are fixedly mounted on the left and right sides of the fixed blocks (407), and a brush (410) is bonded to the extension rod (408).

2. The SCR denitration reactor according to claim 1, characterized in that: The outer wall of the smoke inlet pipe (2) is connected to an ammonia delivery pipe (5), and the ammonia delivery pipe (5) is connected to the ammonia discharge device (6) via a pipe, and the connection relationship is a fixed connection. A plurality of ammonia discharge ports (7) are fixedly installed at the bottom of the ammonia discharge device (6).

3. The SCR denitration reactor according to claim 1, characterized in that: A denitration catalytic device (8) is provided inside the reactor body (1), and a plurality of conical discharge ports (9) are fixedly installed at the bottom of the denitration catalytic device (8).

4. The SCR denitration reactor according to claim 3, characterized in that: A conical recovery reaction chamber (10) is provided inside the reactor body (1) and below the denitration catalytic device (8), and the bottom of the conical recovery reaction chamber (10) is connected to the smoke exhaust pipe (3).

5. The SCR denitration reactor according to claim 1, characterized in that: An electronic pressure control valve (11) is provided outside the smoke exhaust pipe (3), and a control component (12) is provided on the front side of the reactor body (1).

6. The SCR denitration reactor according to claim 5, characterized in that: The control component (12) is composed of a display panel, a signal light and a control button, and the rectifying grid component (409) is composed of a multi-grid plate and a flow direction diffusion guide plate.

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