Denitration equipment suitable for flexible operation of boiler

Abstract

The utility model relates to the field of boiler equipment, and discloses denitration equipment suitable for flexible operation of a boiler, which comprises a first shell and a third shell which are fixedly arranged at the top end and the bottom end of one side of a second shell, the rotating shaft is located in the second shell and fixedly connected with a plurality of fixing discs in the vertical direction, each fixing disc is fixedly provided with a plurality of catalyst containing plates, the surface of each catalyst containing plate is fixedly provided with a denitration catalyst, and the top end of the rotating shaft and the top end of the second shell are rotationally arranged in a penetrating mode and extend to the outer side of the second shell; a positioning disc is fixedly connected to the top end of the rotating shaft, a fixing block is fixedly connected to the top end of the second shell, the top end of the fixing block makes smooth contact with the bottom end of the positioning disc, a plurality of positioning screw holes are formed in the positioning disc in the vertical direction in a penetrating mode, and the positioning screw holes of the positioning disc are fixedly connected with the fixing block through bolts. The equipment disclosed by the utility model is convenient for the denitration treatment process of boiler tail gas.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment, specifically a denitrification device adapted to the flexible operation of boilers. Background Technology

[0002] Combustion flue gas contains nitrogen oxides, which are the main substances causing environmental pollution. Therefore, removing nitrogen oxides from flue gas is an important task in preventing environmental pollution. The mainstream denitrification processes are SCR and SNCR.

[0003] For example, utility model publication (announcement number): CN215138640U discloses a boiler denitrification treatment device, including a denitrification reaction device and a top cover. An air inlet pipe is fixedly connected to the top of one side of the denitrification reaction device, and a reducing agent feed pipe is fixedly connected to the center of the top of the air inlet pipe. An air outlet pipe is fixedly connected to the bottom of the denitrification reaction device on the side away from the air inlet pipe. A collection cylinder is fixedly connected to the bottom of the denitrification reaction device, and a control valve is installed in the center of the collection cylinder. The top cover is fixedly connected to the top of the denitrification reaction device. This utility model improves catalytic reaction efficiency by installing a powerful fan on the top of the top cover to easily blow away dust from the surface of the denitrification catalyst; by using the collection cylinder at the bottom of the denitrification reaction device to collect the dust blown off the surface of the denitrification catalyst; by installing multiple catalyst placement plates in the center of the denitrification reaction device to facilitate the placement of the denitrification catalyst; and by lifting the upper fixing ring upwards to remove the deactivated denitrification catalyst, facilitating catalyst replacement.

[0004] The aforementioned utility model's equipment has multiple catalyst placement plates in the center of the denitrification reaction device for easy placement of the denitrification catalyst; by lifting the upper fixing ring upwards, the deactivated denitrification catalyst can be removed, facilitating catalyst replacement. However, during the catalyst replacement process, the equipment needs to be frequently stopped, which undoubtedly reduces the denitrification process. At the same time, during continuous denitrification, when the active components of the denitrification catalyst are consumed quickly, in order to ensure catalytic efficiency, the equipment needs to be frequently opened for catalyst replacement, which undoubtedly reduces the production and processing speed. Utility Model Content

[0005] The purpose of this invention is to provide a denitrification device that is adapted to the flexible operation of boilers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification device adapted to the flexible operation of a boiler, comprising a first shell and a third shell fixedly installed at the top and bottom of one side of a second shell. A rotating shaft is rotatably connected through the center of the second shell, and a plurality of fixed discs are fixedly connected vertically inside the second shell. Each fixed disc is fixedly installed with a plurality of catalyst placement plates, and a denitrification catalyst is fixedly disposed on the surface of each catalyst placement plate. The top of the rotating shaft is rotatably connected through the top of the second shell and extends to the outside of the second shell, and a positioning disc is fixedly connected to the top of the rotating shaft. A fixing block is fixedly connected to the top of the second shell, and the top of the fixing block is in smooth contact with the bottom of the positioning disc. The positioning disc is provided with a plurality of positioning screw holes through the vertical direction, and the positioning screw holes of the positioning disc are fixedly connected to the fixing block by bolts.

[0007] Preferably, the first housing is connected to an air inlet pipe on one side, and a reducing agent feed pipe is connected to the air inlet pipe on the other side, while the third housing is connected to an exhaust pipe on one side.

[0008] Preferably, each catalyst placement plate is supported by a titanium alloy wire mesh, and the fixing plate has a mounting groove adapted to the catalyst placement plate through it in the vertical direction, and the center of each fixing plate is sleeved and fixed to the outside of the rotating shaft.

[0009] Preferably, a side plate is fixedly installed on one side of the second housing by several bolts, and a sealing frame is fixedly connected to the top and bottom of each fixed plate. Each sealing frame has a grid-shaped structure, and the two sealing frames at the top and bottom are respectively in smooth contact with the inner wall of the second housing.

[0010] Preferably, the top and bottom ends of the second shell are respectively provided with gas delivery channels of the same shape as the denitrification catalyst at the connection points with the first shell and the third shell.

[0011] Preferably, the catalyst placement plate, the denitrification catalyst, and the positioning screw holes are of the same number and are evenly distributed in a ring along the surface of the fixed plate and the surface of the positioning plate, respectively.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] This invention thoroughly mixes the flue gas to be denitrated with a reducing agent, which then enters the first housing through the inlet pipe. The gas then flows into the second housing through a gas delivery channel located below the first housing. The number of positioning screw holes, catalyst placement plates, and denitrification catalysts are all equal. By adjusting the orientation of the catalyst placement plates and denitrification catalysts, when the positioning screw holes of the positioning plate are fixed to the fixing block with bolts, the denitrification catalyst on the surface of the fixing plate and the gas delivery channel are aligned vertically. This allows the flue gas entering the second housing to undergo denitrification treatment under the action of the denitrification catalyst. The denitrification catalyst fills the small square area enclosed by the sealing frame, ensuring the denitrification effect. Multiple sealing frames are provided for the flue gas to flow from the fixing plate and the second housing. The catalyst enters the second housing on the other side and reacts with the unused denitrification catalyst. When it is necessary to replace the denitrification catalyst that has been used for a period of time, the bolts of the positioning plate are removed, and the positioning plate is rotated so that the denitrification catalyst on the surface of the fixed plate rotates with the rotating shaft to the side of the second housing away from the first and third housings. This allows the adjacent unused denitrification catalyst to enter the second housing on the side of the first and third housings. Then, the positioning plate is fixed to the fixing block with bolts, so that the denitrification catalyst can be replaced without stopping the machine. After all the denitrification catalyst in the second housing has been used, the bolts of the side plate are opened and the side plate is removed, and then the denitrification catalyst in the second housing is replaced, reducing the frequency of equipment disassembly and minimizing equipment downtime. Attached Figure Description

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

[0015] Figure 2 This is a top view of the structure of this utility model.

[0016] In the diagram: 1. First shell; 2. Second shell; 3. Third shell; 4. Inlet pipe; 5. Reducing agent inlet pipe; 6. Exhaust pipe; 7. Rotating shaft; 8. Fixed plate; 9. Catalyst placement plate; 10. Denitrification catalyst; 11. Positioning plate; 12. Fixing block; 13. Positioning screw hole; 14. Side plate; 15. Sealing frame; 16. Gas delivery trough. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] Please see Figures 1-2 The diagram shows a denitrification device adapted to the flexible operation of a boiler, comprising a first shell 1 and a third shell 3 fixedly installed at the top and bottom of one side of a second shell 2. A rotating shaft 7 is rotatably connected through the center of the second shell 2, and the rotating shaft 7 is located inside the second shell 2 and is fixedly connected vertically to several fixed plates 8. Several catalyst placement plates 9 are fixedly installed on each fixed plate 8, and denitrification catalyst 10 is fixedly arranged on the surface of each catalyst placement plate 9. The top of the rotating shaft 7 is rotatably connected through the top of the second shell 2 and extends to the outside of the second shell 2. A positioning plate 11 is fixedly connected to the top of the rotating shaft 7. A fixing block 12 is fixedly connected to the top of the second shell 2, and the top of the fixing block 12 is in smooth contact with the bottom of the positioning plate 11. Several positioning screw holes 13 are opened through the positioning plate 11 in the vertical direction, and the positioning screw holes 13 of the positioning plate 11 are fixedly connected to the fixing block 12 by bolts.

[0020] In this embodiment, the first housing 1 is connected to an air inlet pipe 4 on one side, and the air inlet pipe 4 is connected to a reducing agent feed pipe 5 on one side. The third housing 3 is connected to an exhaust pipe 6 on one side. Each catalyst placement plate 9 is supported by a titanium alloy wire mesh, and the fixing plate 8 is vertically perforated with an installation groove that matches the catalyst placement plate 9. The center of each fixing plate 8 is sleeved and fixed to the outside of the rotating shaft 7. The second housing 2 is fixedly installed with a side plate 14 by several bolts on one side, and the top and bottom of each fixing plate 8 are respectively fixedly connected with a sealing frame 15. Each sealing frame 15 has a grid-shaped structure, and the two sealing frames 15 at the top and bottom are respectively in smooth contact with the inner wall of the second housing 2. The top and bottom of the second housing 2 are respectively connected to the first housing 1 and the third housing 3 with gas delivery grooves 16 that are the same shape as the denitrification catalyst 10. The catalyst placement plate 9, the denitrification catalyst 10 and the positioning screw holes 13 are the same in number and are evenly distributed in a ring along the surface of the fixing plate 8 and the positioning plate 11.

[0021] Furthermore, the flue gas to be denitrated and the reducing agent are thoroughly mixed and enter the interior of the first housing 1 through the inlet pipe 4. It then enters the second housing 2 through the gas delivery channel 16 opened below the first housing 1. The number of positioning screw holes 13, catalyst placement plates 9, and denitration catalysts 10 are all equal. By adjusting the orientation of the catalyst placement plates 9 and denitration catalysts 10, when the positioning screw holes 13 of the positioning plate 11 are fixed to the fixing block 12 with bolts, the denitration catalysts 10 on the surface of the fixing plate 8 and the gas delivery channel 16 are aligned vertically. This allows the flue gas entering the second housing 2 to undergo denitration treatment under the action of the denitration catalysts 10. The denitration catalysts 10 fill the small square area enclosed by the sealing frames 15, ensuring the denitration effect. The multiple sealing frames 15 are used for the flue gas to pass between the fixing plate 8 and the second housing 2. The catalyst enters the second housing 2 on the other side and reacts with the unused denitrification catalyst 10. When it is necessary to replace the denitrification catalyst 10 that has been used for a period of time, the bolts of the positioning plate 11 are removed, and the positioning plate 11 is rotated so that the denitrification catalyst 10 on the surface of the fixing plate 8 rotates with the rotating shaft 7 to the side of the second housing 2 away from the first housing 1 and the third housing 3, and the adjacent unused denitrification catalyst 10 enters the second housing 2 on the side of the first housing 1 and the third housing 3. Then the positioning plate 11 is fixed to the fixing block 12 with bolts, so that the denitrification catalyst 10 can be replaced without stopping the machine. After all the denitrification catalyst 10 in the second housing 2 has been used, the bolts of the side plate 14 are opened and the side plate 14 is removed, and then the denitrification catalyst 10 in the second housing 2 is replaced, reducing the frequency of equipment disassembly and reducing equipment downtime.

[0022] The working principle of this utility model is as follows: The flue gas to be denitrated and the reducing agent are thoroughly mixed and enter the interior of the first housing 1 through the inlet pipe 4. The gas then enters the second housing 2 through the gas delivery channel 16 opened below the first housing 1. The number of positioning screw holes 13, catalyst placement plates 9, and denitration catalysts 10 are equal. By adjusting the orientation of the catalyst placement plates 9 and denitration catalysts 10, when the positioning screw holes 13 of the positioning plate 11 are fixed to the fixing block 12 with bolts, the denitration catalysts 10 on the surface of the fixing plate 8 and the gas delivery channel 16 are aligned vertically. This allows the flue gas entering the second housing 2 to undergo denitration treatment under the action of the denitration catalysts 10. The denitration catalysts 10 fill the small square area enclosed by the sealing frames 15, ensuring the denitration effect. The multiple sealing frames 15 are used for flue gas to enter the second housing 2 from between the fixing plate 8 and the second housing 2 on the other side. Inside the housing 2, the unused denitrification catalyst 10 reacts. When it is necessary to replace the denitrification catalyst 10 that has been used for a period of time, the bolts of the positioning plate 11 are removed, and the positioning plate 11 is rotated so that the denitrification catalyst 10 on the surface of the fixed plate 8 rotates with the rotating shaft 7 to the side of the second housing 2 away from the first housing 1 and the third housing 3, and the adjacent unused denitrification catalyst 10 enters the second housing 2 on the side of the first housing 1 and the third housing 3. Then the positioning plate 11 is fixed to the fixing block 12 with bolts, so that the denitrification catalyst 10 can be replaced without stopping the machine. After all the denitrification catalyst 10 in the second housing 2 has been used, the bolts of the side plate 14 are opened and the side plate 14 is removed, and the denitrification catalyst 10 in the second housing 2 is replaced. This reduces the frequency of equipment disassembly and the downtime of the equipment. The flue gas after denitrification is discharged from the exhaust pipe 6 on the side of the third housing 3.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A denitrification device adapted to the flexible operation of a boiler, comprising a first shell (1) and a third shell (3) fixedly installed at the top and bottom ends of one side of a second shell (2), characterized in that: The second housing (2) is rotatably connected to a rotating shaft (7) at its center. The rotating shaft (7) is located inside the second housing (2) and is fixedly connected to several fixed disks (8) in the vertical direction. Each fixed disk (8) is fixedly installed with several catalyst placement plates (9), and each catalyst placement plate (9) is fixedly provided with a denitrification catalyst (10). The top of the rotating shaft (7) is rotatably connected to the top of the second housing (2) and extends to the outside of the second housing (2). The top of the rotating shaft (7) is fixedly connected to a positioning disk (11). The top of the second housing (2) is fixedly connected to a fixing block (12), and the top of the fixing block (12) is in smooth contact with the bottom of the positioning disk (11). The positioning disk (11) is provided with several positioning screw holes (13) in the vertical direction, and the positioning screw holes (13) of the positioning disk (11) are fixedly connected to the fixing block (12) by bolts.

2. The denitrification equipment adapted to the flexible operation of boilers according to claim 1, characterized in that: The first housing (1) is connected to an air inlet pipe (4) on one side, and a reducing agent feed pipe (5) is connected to the air inlet pipe (4) on one side. The third housing (3) is connected to an exhaust pipe (6) on one side.

3. A denitrification device adapted to the flexible operation of a boiler according to claim 2, characterized in that: Each catalyst placement plate (9) is supported by a titanium alloy wire mesh, and the fixing plate (8) has a mounting groove adapted to the catalyst placement plate (9) through it in the vertical direction. The center position of each fixing plate (8) is sleeved and fixed on the outside of the rotating shaft (7).

4. A denitrification device adapted to the flexible operation of a boiler according to claim 3, characterized in that: A side plate (14) is fixedly installed on one side of the second housing (2) by several bolts, and a sealing frame (15) is fixedly connected to the top and bottom of each fixed plate (8). Each sealing frame (15) is a grid structure, and the two sealing frames (15) at the top and bottom are far apart from each other and make smooth contact with the inner wall of the second housing (2).

5. A denitrification device adapted to the flexible operation of a boiler according to claim 4, characterized in that: The top and bottom ends of the second shell (2) are respectively connected to the first shell (1) and the third shell (3) and are respectively provided with gas delivery grooves (16) with the same shape as the denitrification catalyst (10).

6. A denitrification device adapted to the flexible operation of a boiler according to claim 5, characterized in that: The catalyst placement plate (9), denitrification catalyst (10) and positioning screw hole (13) are of the same number and are evenly distributed in a ring along the surface of the fixed plate (8) and the positioning plate (11), respectively.

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