Dry denitration device for boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a dry denitration device for a boiler, which comprises a reactor, a flue and a plurality of spray pipes, the flue is mounted on the outer side of the reactor and communicated with the reactor, the spray pipes are arranged above the flue and communicated with the reactor, and the top end of the reactor is fixedly connected with an exhaust pipe communicated with the reactor. By arranging the reactor, the flue, the spray pipe, the exhaust pipe, the discharge hole, a plug, a fixing ring, a mounting hole plate, a bolt, a nut, a stirring assembly, a circular truncated cone and a material pushing plate, when the device is used, the material pushing plate can scrape up a denitration agent at the bottom end of the inner side of the reactor to prevent the denitration agent from being hardened and difficult to clean; and the motor is started to enable the material pushing plate to push the denitration agent, so that the denitration agent is discharged through the discharging hole, the denitration agent is recycled, the denitration agent can be cleaned and discharged more conveniently through the arrangement of the stirring assembly and the connecting component of the stirring assembly, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a dry denitrification device for boilers. Background Technology

[0002] A coal-fired boiler refers to a boiler that burns coal as fuel. After the heat from the coal is converted, it produces steam or hot water. Coal-fired boilers are an important piece of equipment in thermal power generation. During the power generation process, a large amount of flue gas is generated, which usually contains a large number of air pollutants, such as sulfur oxides and nitrogen oxides. Traditional flue gas treatment mainly targets sulfur oxides. In recent years, with the increase in people's awareness of nitrogen oxides and the gradual enhancement of environmental awareness, people have gradually realized that nitrogen oxides pollute the ozone layer. Dry denitrification is a technical method for removing nitrogen oxides from waste gas without using water.

[0003] Existing dry denitrification devices are widely used. When using these devices, powdered denitrification agents need to be sprayed into the reactor to mix and react with the flue gas. However, most existing devices cannot guarantee that the flue gas and powdered denitrification agents are fully mixed. Some unreacted denitrification agents will settle at the bottom of the reactor, making it difficult for operators to clean. Therefore, a dry denitrification device for boilers is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a dry denitrification device for boilers, so as to solve the problems mentioned in the background art that the existing devices cannot guarantee the full mixing of flue gas and denitrification agent and that the deposited denitrification agent is difficult to clean.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dry denitrification device for boilers includes a reactor, a flue installed outside the reactor and communicating with the reactor, and multiple spray pipes installed above the flue and communicating with the reactor. An exhaust pipe communicating with the reactor is fixedly connected to the top of the reactor, and a discharge hole communicating with the reactor is fixedly connected to the bottom of the reactor. A plug is provided inside the discharge hole, and a fixing ring is fixedly connected to the bottom of the plug. Multiple mounting plates are fixedly connected to the outside of the fixing ring and the bottom of the reactor. Bolts are provided inside the mounting plates, and nuts are threaded to the outside of the bolts. A stirring assembly is installed inside the reactor.

[0007] Preferably, there are multiple discharge holes, which are evenly distributed at the bottom of the reactor. The height of the plug is the same as the height of the discharge hole, and the top of the mounting plate is tightly fitted to the bottom of the reactor.

[0008] Preferably, the stirring assembly includes a motor fixedly connected to the bottom of the reactor, a vertically arranged connecting shaft located inside the reactor fixedly connected to the top of the motor output shaft, an inner ring of a bearing fixedly connected to the top of the connecting shaft, and a connecting plate fixedly connected to the inner side of the exhaust pipe fixedly connected to the outer ring of the bearing.

[0009] Preferably, a frustum is rotatably connected to the outside of the connecting shaft and fixedly connected to the bottom of the inner side of the reactor, and a pusher plate is symmetrically provided on the outside of the frustum and fixedly connected to the outside of the connecting shaft and is inclined.

[0010] Preferably, the side of the pusher plate closest to the truncated cone is in contact with the truncated cone, and the bottom end of the pusher plate is in contact with the bottom end of the inner side of the reactor.

[0011] Preferably, the pusher plate is provided with a baffle plate fixedly connected to the outside of the connecting shaft and arranged at an angle. There are multiple baffle plates, and the baffle plates are evenly distributed on the outside of the connecting shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, by setting up a reactor, flue, spray pipe, exhaust pipe, discharge hole, plug, fixing ring, mounting plate, bolt, nut, stirring assembly, frustum and pusher plate, when using the device, the pusher plate can scrape up the denitrification agent at the bottom of the inner side of the reactor to prevent it from hardening and being difficult to clean. After the device is used, the fixing ring is removed, the motor is started to make the pusher plate push the denitrification agent, so that the denitrification agent is discharged through the discharge hole, thereby recycling the denitrification agent. The setting of the stirring assembly and its connecting components can make the cleaning and discharge of the denitrification agent more convenient and improve the working efficiency.

[0014] 2. In this utility model, through the provided stirring assembly, motor, connecting shaft, bearing, connecting plate and baffle, when the device is in use, the motor output shaft drives the connecting shaft to rotate, and the baffle disperses the denitrification agent entering the reactor, so that the denitrification agent and flue gas are fully mixed and reacted, thereby improving the utilization rate of the denitrification agent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the fixing ring installation structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the bottom structure of the reactor of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the reactor and exhaust pipe of this utility model.

[0019] In the diagram: 1. Reactor; 2. Flue; 3. Nozzle; 4. Exhaust pipe; 5. Discharge port; 6. Plug; 7. Fixing ring; 8. Mounting orifice plate; 9. Bolt; 10. Nut; 11. Stirring assembly; 111. Motor; 112. Connecting shaft; 113. Bearing; 114. Connecting plate; 12. Frustum; 13. Pusher plate; 14. Baffle plate. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] A dry denitrification device for boilers includes a reactor 1, a flue 2 installed outside and communicating with the reactor 1, and multiple nozzles 3 installed above the flue 2 communicating with the reactor 1. An exhaust pipe 4 communicating with the reactor 1 is fixedly connected to the top of the reactor 1, and a discharge port 5 communicating with the reactor 1 is fixedly connected to the bottom of the reactor 1. A plug 6 is provided inside the discharge port 5, and a fixing ring 7 is fixedly connected to the bottom of the plug 6. Multiple mounting plates 8 are fixedly connected to the outside of the fixing ring 7 and the bottom of the outside of the reactor 1. Screws are provided inside the mounting plates 8. Bolt 9 has a nut 10 threaded on its outer side. A stirring assembly 11 is installed inside the reactor 1. There are multiple discharge holes 5, which are evenly distributed at the bottom of the reactor 1. The height of the plug 6 is the same as the height of the discharge holes 5. The top of the mounting plate 8 is tightly fitted to the bottom of the reactor 1. The stirring assembly 11 includes a motor 111 fixedly connected to the bottom of the reactor 1. The top of the output shaft of the motor 111 is fixedly connected to a vertically arranged connecting shaft 112 located inside the reactor 1. The top of the connecting shaft 112 is fixedly connected to an inner bearing 113. The outer ring of bearing 113 is fixedly connected to a connecting plate 114 fixedly connected to the inner side of exhaust pipe 4. A frustum 12 fixedly connected to the inner bottom of reactor 1 is rotatably connected to the outer side of connecting shaft 112. A pusher plate 13, symmetrically arranged and fixedly connected to the outer side of connecting shaft 112 and inclined, is provided on the outer side of frustum 12. The side of pusher plate 13 closest to frustum 12 is in contact with frustum 12, and the bottom end of pusher plate 13 is in contact with the inner bottom of reactor 1. The reactor 1, flue 2, spray pipe 3, exhaust pipe 4, discharge hole 5, and plug 6 are all connected. The device includes a fixed ring 7, a mounting plate 8, bolts 9, nuts 10, a stirring assembly 11, a frustum 12, and a pusher plate 13. During use, the pusher plate 13 scrapes up the denitrifying agent at the bottom of the inner side of the reactor 1 to prevent it from hardening and becoming difficult to clean. After the device is used, the fixed ring 7 is removed, and the motor 111 is started to make the pusher plate 13 push the denitrifying agent, which is then discharged through the discharge hole 5, thereby recycling the denitrifying agent. The stirring assembly 11 and its connecting components make the cleaning and discharge of the denitrifying agent more convenient and improve work efficiency.

[0025] Above the pusher plate 13, there is a baffle plate 14 fixedly connected to the outside of the connecting shaft 112 and arranged at an angle. There are multiple baffle plates 14, which are evenly distributed on the outside of the connecting shaft 112. Through the provided stirring assembly 11, motor 111, connecting shaft 112, bearing 113, connecting plate 114 and baffle plates 14, when the device is in use, the output shaft of motor 111 drives the connecting shaft 112 to rotate, and the baffle plates 14 disperse the denitrification agent entering the reactor 1, so that the denitrification agent and flue gas are fully mixed and reacted, thereby improving the utilization rate of the denitrification agent.

[0026] Workflow: When the device is needed, first install the fixing ring 7. Vertically align the plug 6 at the top of the fixing ring 7 with the discharge hole 5 and insert it. Align the reactor 1 and the mounting plate 8 on the outside of the fixing ring 7 horizontally. Then insert the bolt 9 into the inside of the mounting plate 8 and tighten the nut 10 on the outside of the bolt 9. This completes the installation of the fixing ring 7. Next, connect the flue duct 2 to the boiler outlet, connect the spray pipe 3 to the denitrification agent injector, and connect the exhaust pipe 4 to the next treatment equipment. The device is then ready for normal use. When using the device for flue gas denitrification, the flue gas enters the inside of the reactor 1 through the flue duct 2, and the denitrification agent enters the inside of the reactor 1 through the spray pipe 3. At this time, the motor 111 can be started. The output shaft of the motor 111 drives the connecting shaft 112 to rotate inside the bearing 113 on the connecting plate 114. The baffle 14 agitates the denitrification agent entering the reactor 1. The process involves mixing the denitrifying agent with the flue gas to ensure a thorough reaction. Unreacted denitrifying agent will descend, pass through the frustum 12, and deposit at the bottom inner side of the reactor 1. At this point, the pusher plate 13 scrapes up the denitrifying agent on the outside of the frustum 12 and at the bottom inner side of the reactor 1 to prevent it from hardening and becoming difficult to clean. The flue gas after the reaction is complete is discharged through the exhaust pipe 4 to enter the next process. After the device is used, the connected equipment is shut off, the collection box is placed directly below the reactor 1, the nut 10 is unscrewed from the outside of the bolt 9, and the fixing ring 7 and the plug 6 are removed. The motor 111 is started and rotated at low speed. At this time, the pusher plate 13 pushes the denitrifying agent at the bottom inner side of the reactor 1, allowing the denitrifying agent to be discharged into the collection box through the discharge hole 5 at the bottom of the reactor 1, thereby recycling the denitrifying agent. The setting of the stirring assembly 11 and its connecting components makes the cleaning and discharge of the denitrifying agent more convenient and improves work efficiency.

[0027] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0028] 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 dry denitrification device for boilers, comprising a reactor (1), a flue (2) installed outside the reactor (1) and communicating with the reactor (1), and a plurality of nozzles (3) disposed above the flue (2) and communicating with the reactor (1), characterized in that: The top of the reactor (1) is fixedly connected to an exhaust pipe (4) that communicates with the reactor (1). The bottom of the reactor (1) is fixedly connected to a discharge hole (5) that communicates with the reactor (1). A plug (6) is provided inside the discharge hole (5). A fixing ring (7) is fixedly connected to the bottom of the plug (6). Multiple mounting plates (8) are fixedly connected to the outside of the fixing ring (7) and the bottom of the outside of the reactor (1). Bolts (9) are provided inside the mounting plates (8). Nuts (10) are threadedly connected to the outside of the bolts (9). A stirring assembly (11) is installed inside the reactor (1).

2. The dry denitrification device for boilers according to claim 1, characterized in that: The number of discharge holes (5) is multiple, and the discharge holes (5) are evenly distributed at the bottom of the reactor (1). The height of the plug (6) is the same as the height of the discharge holes (5), and the top of the mounting plate (8) is tightly fitted to the bottom of the reactor (1).

3. The dry denitrification device for boilers according to claim 2, characterized in that: The stirring assembly (11) includes a motor (111) fixedly connected to the bottom of the reactor (1). The top of the output shaft of the motor (111) is fixedly connected to a vertically arranged connecting shaft (112) located inside the reactor (1). The top of the connecting shaft (112) is fixedly connected to the inner ring of a bearing (113). The outer ring of the bearing (113) is fixedly connected to a connecting plate (114) fixedly connected to the inside of the exhaust pipe (4).

4. A dry denitrification device for boilers according to claim 3, characterized in that: The connecting shaft (112) is rotatably connected to a frustum (12) fixedly connected to the bottom of the inner side of the reactor (1). The frustum (12) is symmetrically provided with a pusher plate (13) fixedly connected to the outside of the connecting shaft (112) and inclined.

5. A dry denitrification device for boilers according to claim 4, characterized in that: The pusher plate (13) is attached to the side of the truncated cone (12) on the side close to the truncated cone (12), and the bottom end of the pusher plate (13) is attached to the bottom end of the inner side of the reactor (1).

6. A dry denitrification device for boilers according to claim 5, characterized in that: Above the pusher plate (13) is a baffle plate (14) fixedly connected to the outside of the connecting shaft (112) and arranged at an angle. There are multiple baffle plates (14), and the baffle plates (14) are evenly distributed on the outside of the connecting shaft (112).

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