A flue gas treatment device for an industrial boiler

Abstract

The utility model relates to flue gas treatment technical field discloses a flue gas treatment device of industrial boiler, including processing jar, the left side surface lower extreme of processing jar is connected with the inside communication of smoke inlet pipe, the left end of smoke inlet pipe is connected with the pipe cover, the front of processing jar is provided with the spraying mechanism, the inside of processing jar is provided with cloth smoke piece no.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically a flue gas treatment device for an industrial boiler. Background Technology

[0002] Industrial boilers, as core equipment for heat energy supply, are widely used in many industries such as power generation, heating, chemical industry, textile industry, and food processing; however, the flue gas produced by their combustion of fuel is one of the main sources of air pollution.

[0003] A search revealed that patent number CN210874633U discloses a flue gas treatment device for a coal-fired boiler, comprising a shell, an air inlet equalization pipe, a support, a guide plate, an ash hopper, a middle box, an upper box, and a flue gas exhaust device. Although larger particles first pass through the ash hopper for natural settling, the filter bag only needs to filter fine particles, which can greatly reduce the resistance of the flue gas treatment device and reduce energy consumption. However, it is not effective in treating the heat in the flue gas, which makes the device prone to damage during subsequent treatment of the flue gas.

[0004] Chinese patent discloses a flue gas treatment device for coal-fired boilers (authorization announcement number CN222210365U). This patented technology uses two horizontal frames, which are respectively clamped to the top and bottom of an S-shaped tube through slots. The horizontal frames are then fixed inside a cooling box by welding. Sufficient water is filled into the cooling box. The flue gas generated by the coal-fired boiler is drawn out by a fan, which then transports the flue gas to the inside of the S-shaped tube, allowing it to move within the cooling box. The S-shaped tube effectively increases the flow time of the flue gas inside the cooling box, allowing its heat to be fully absorbed by the water, thereby removing the heat from the flue gas and preventing the device from being damaged by excessively high flue gas temperatures.

[0005] However, it has certain drawbacks: its flue gas introduction method is too crude. After the flue gas is cooled by the S-shaped coil, its flow kinetic energy is reduced. Although the temperature distribution is somewhat uniform, when the flue gas is directly sprayed into the dust collector box in the form of a concentrated and high-speed jet through the nozzle, due to the lack of an effective distribution and guiding structure, the flue gas is very likely to enter the dust collection area in the form of agglomerated gas masses with high central concentration. This agglomeration phenomenon leads to a significant reduction in the effective contact area between the flue gas and the spray droplet group arranged in the dust collector box. It is difficult for the gas and liquid phases to achieve full and uniform mixing. The direct consequence is that some flue gas passes through the dust collection area without colliding and wetting with the droplets, resulting in low dust removal efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a flue gas treatment device for industrial boilers to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A flue gas treatment device for an industrial boiler includes a treatment tank. A flue gas inlet pipe communicating with the interior of the treatment tank is fixedly connected to the lower end of the left side surface of the treatment tank. A pipe cover is fixedly connected to the left end of the flue gas inlet pipe, and a filter plate is movably connected inside the flue gas inlet pipe. Multiple fixing bolts are movably connected through the outer edge of the left side surface of the filter plate, and a fixing block is threaded to the right end of the fixing bolts. A spraying mechanism is provided in front of the treatment tank; The processing tank is equipped with a smoke distribution component, which includes a smoke distribution plate. Multiple support rods are movably connected through the outer edge of the smoke distribution plate. A support block is fixed to the lower end of the support rod. Multiple air pipes are fixedly connected through the inside of the smoke distribution plate. Multiple air holes are opened on the surface of the air pipes above the smoke distribution plate. Inside the treatment tank, below the first smoke-spreading component, is a second smoke-spreading component.

[0008] As a further embodiment of this utility model: the second smoke-making component includes a mounting cover, a plurality of mounting tubes connected to the right side surface of the mounting cover are fixedly connected to the inside therein, a plurality of air holes are opened on the lower surface of the mounting tubes, and a plurality of disintegrating components are provided on the upper surface of the mounting tubes.

[0009] As a further embodiment of this utility model: the disintegrating component includes a rotating rod, a rotating tube is rotatably sleeved on the outside of the rotating rod, and a disintegrating plate is fixedly connected to the upper end of the rotating rod, and an impeller is fixedly connected to the lower end of the rotating rod.

[0010] As a further embodiment of this utility model: the mounting cover is fixedly connected to the inner left side surface of the treatment tank at the position opposite to the smoke inlet pipe, the rotating pipe is fixedly connected to the upper surface of the mounting pipe, and the impeller is located inside the mounting pipe.

[0011] As a further embodiment of this utility model: the fixing block is fixed to the inner surface of the smoke inlet pipe, and the support block is fixed to the inner surface of the treatment tank.

[0012] As a further embodiment of this utility model: the spraying mechanism includes a delivery pump and a reagent tank located in front of the delivery pump. The inlet end of the delivery pump is connected to a first pipe, which is connected to the inside of the reagent tank. The outlet end of the delivery pump is fixedly connected to a second pipe, which is fixedly connected to the upper end of the front surface of the treatment tank. A nozzle is fixedly connected to the upper end of the second pipe, which is located inside the treatment tank and above the smoke distribution plate.

[0013] As a further embodiment of this utility model: a heat exchange box is installed on the left side of the processing tank, and a heat exchange tube is installed inside the heat exchange box. Both ends of the heat exchange tube are fixedly connected to the upper surface of the heat exchange box, and a connecting pipe communicating with the inside of the heat exchange tube is fixedly connected to the right end of the heat exchange tube. The other end of the connecting pipe is fixedly connected to the pipe cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention pre-cools and recovers waste heat from high-temperature flue gas by setting up a heat exchange box, performs primary filtration of particulate matter using a filter plate in the flue gas inlet pipe, and adopts a two-stage smoke distribution structure to work together. The second smoke distribution component releases flue gas through the second air hole and uses the flue gas's own power to drive the dispersing component to actively disperse and cut the flue gas. The first smoke distribution component uses a multi-pipe and multi-hole structure to make the flue gas evenly distributed in a secondary manner, forming a fine airflow. In this process, it is fully mixed and contacted with the agent sprayed by the atomizing nozzle, which greatly improves the gas-liquid mass transfer efficiency and reaction rate, thereby achieving efficient and synergistic removal of pollutants in the flue gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a flue gas treatment device for an industrial boiler. Figure 2 This is a partial cross-sectional view of a flue gas treatment device for an industrial boiler. Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 This is a schematic diagram of the spray mechanism in a flue gas treatment device for an industrial boiler. Figure 5 This is a schematic diagram of the structure of a smoke distribution component in a flue gas treatment device for an industrial boiler. Figure 6 This is a schematic diagram of the structure of the second smoke distribution element in a flue gas treatment device for an industrial boiler. Figure 7 This is a cross-sectional view of a second smoke distribution element in a flue gas treatment device for an industrial boiler. Figure 8 This is a schematic diagram of the structure of a disassembled component in a flue gas treatment device for an industrial boiler.

[0016] In the diagram: 1. Treatment tank; 2. Smoke inlet pipe; 3. Pipe cover; 4. Filter plate; 5. Fixing bolt; 6. Fixing block; 7. Spraying mechanism; 8. Transfer pump; 9. Chemical tank; 10. Pipe 1; 11. Pipe 2; 12. Spray head; 13. Heat exchange box; 14. Heat exchange tube; 15. Connecting pipe; 16. Smoke distribution component 1; 17. Smoke distribution plate; 18. Support rod; 19. Support block; 20. Air pipe; 21. Air hole 1; 22. Smoke distribution component 2; 23. Mounting cover; 24. Mounting pipe; 25. Air hole 2; 26. Dispersing component; 27. Rotating rod; 28. Rotating pipe; 29. ​​Dispersing plate; 30. Impeller. Detailed Implementation

[0017] Please see Figures 1-4In this embodiment of the present invention, a flue gas treatment device for an industrial boiler includes a treatment tank 1; the treatment tank 1 adopts a tower structure, with a conical section at the lower end to facilitate the collection of waste liquid generated after spray washing; the middle and upper part is a vertical section to provide sufficient space for full contact and reaction between the gas and liquid phases; and the top is a conical pipe cover to form an outlet channel for clean flue gas. A valve connected to the interior of the treatment tank 1 is fixed to the lower end and is used to discharge waste liquid when opened. A flue gas inlet pipe 2 is fixedly connected to the lower end of the left side surface of the treatment tank 1, and a pipe cover 3 is fixedly connected to the left end of the flue gas inlet pipe 2. The pipe cover 3 is fixedly connected to the flue gas inlet pipe 2 by bolts, and the pressurized boiler flue gas is discharged into the interior of the treatment tank 1 through the flue gas inlet pipe 2. The inside of the flue gas inlet pipe 2 is movably connected to a filter plate 4; the circumferential side of the filter plate 4 is attached to the inner wall of the flue gas inlet pipe 2, and it is used to perform preliminary filtration of particulate impurities in the flue gas. It can be a metal sintered mesh, a perforated plate or other structures, and its filtration accuracy can be selected according to the actual working conditions. Multiple fixing bolts 5 are movably connected through the outer edge of the left side surface of the filter plate 4. The right end of the fixing bolt 5 is threaded with a fixing block 6, which is fixed to the inner surface of the smoke inlet pipe 2. The filter plate 4 can be disassembled and maintained after the fixing bolts 5 are unscrewed. A spraying mechanism 7 is provided in front of the treatment tank 1. The spraying mechanism 7 includes a conveying pump 8 and a reagent tank 9 located in front of the conveying pump 8. The reagent tank 9 stores prepared absorbents, such as sodium hydroxide or limestone slurry for desulfurization, alkaline solution with added oxidant for denitrification, etc. The reagent tank 9 includes a tank body and a tank cover. The inlet of the delivery pump 8 is connected to a pipe 10, which is connected to the inside of the reagent tank 9. The outlet of the delivery pump 8 is fixedly connected to a pipe 11, which is fixedly connected to the upper part of the front surface of the treatment tank 1. A nozzle 12 is fixedly connected to the upper end of the pipe 11. The nozzle 12 is located inside the treatment tank 1 and is an atomizing nozzle used to atomize the liquid reagent into extremely fine droplets, which greatly increases the contact area between the gas and liquid phases.

[0018] exist Figure 1 In the middle: A heat exchange box 13 is installed on the left side of the treatment tank 1, and a heat exchange tube 14 is installed inside the heat exchange box 13; the heat exchange box 13 contains a heat exchange medium, such as water, and the heat exchange tube 14 is used for the flow of flue gas, thereby performing heat exchange and realizing heat recovery and utilization; the material of the heat exchange tube 14 is preferably a high thermal conductivity metal such as 304 stainless steel, and the part of the heat exchange tube 14 located in the heat exchange box 13 is S-shaped, which prolongs the residence time of the flue gas in the heat exchange medium, enhances the heat transfer process, and ensures sufficient heat exchange; Both ends of the heat exchange tube 14 are fixed to the upper surface of the heat exchange box 13, and the right end of the heat exchange tube 14 is fixed to a connecting pipe 15 that communicates with its interior. The other end of the connecting pipe 15 is fixed to the tube cover 3.

[0019] exist Figure 2 and Figure 5 In the treatment tank 1, a smoke distribution component 16 is provided inside. The smoke distribution component 16 includes a smoke distribution plate 17. A nozzle 12 is located above the smoke distribution plate 17. Multiple support rods 18 are movably connected through the outer edge of the smoke distribution plate 17. A support block 19 is fixedly connected to the lower end of the support rod 18. The support block 19 is fixedly connected to the inner surface of the treatment tank 1. Multiple air pipes 20 are fixedly connected through the inside of the smoke distribution plate 17. Multiple air holes 21 are opened on the surface of the air pipes 20 above the smoke distribution plate 17. The air holes 21 allow the smoke to escape in a "foaming" manner from multiple small and uniform channels, forming an efficient countercurrent contact with the liquid chemical sprayed down from above.

[0020] exist Figure 2 and Figure 6 Inside the treatment tank 1, below the first smoke distribution component 16, a second smoke distribution component 22 is provided. The second smoke distribution component 22 includes a mounting cover 23, which is fixed to the left side surface of the inside of the treatment tank 1, directly opposite the smoke inlet pipe 2. The right side surface of the mounting cover 23 is fixed with multiple mounting pipes 24 communicating with its interior. The lower surface of the mounting pipes 24 is provided with multiple second air holes 25. The second air holes 25 are used for secondary refinement of the flue gas, and they are located on the lower surface of the mounting pipes 24 to prevent the reagent from entering the mounting pipes 24. The upper surface of the mounting pipe 24 is provided with multiple dispersing components 26. Each dispersing component 26 includes a rotating rod 27, with a rotating tube 28 rotatably sleeved on the outside of the rotating rod 27. The rotating tube 28 passes through and is fixed to the upper surface of the mounting pipe 24. A dispersing plate 29 is fixed to the upper end of the rotating rod 27, and an impeller 30 is fixed to the lower end of the rotating rod 27. The impeller 30 is located inside the mounting pipe 24. The pressurized flue gas enters the mounting pipe 24 and impacts the impeller 30, causing the rotating rod 27 to rotate, which in turn causes the dispersing plate 29 to rotate. The dispersing plate 29 mechanically breaks and cuts the flue gas bundle that just emerged from the second air hole 25, further dispersing it into finer airflow and generating turbulence, which greatly enhances the mixing effect with the agent. When two adjacent disintegration components 26 are running, the disintegration plates 29 and impellers 30 will not touch each other and cause interference. Furthermore, a corrosion-resistant duct fan with a filter can be installed inside the mounting cover 23 to repressurize the pressurized flue gas.

[0021] The working principle of this utility model is as follows: High-temperature boiler flue gas first enters the heat exchange tube 14 of the heat exchange box 13, and cools down after exchanging heat with the heat exchange medium; the cooled flue gas is introduced into the flue pipe 2 through the connecting pipe 15, and large particles are initially filtered when it flows through the filter plate 4; then the flue gas enters the second smoke distribution piece 22 inside the treatment tank 1, and initially escapes from the second air hole 25 on the lower surface of the mounting pipe 24. At the same time, the flue gas pressure drives the impeller 30 to rotate, which drives the dispersing plate 29 to rotate and further disperse the flue gas; then the flue gas rises through the first smoke distribution piece 16 and escapes evenly from the first air hole 21 on the air pipe 20. During this process, it is fully mixed with the absorbent sprayed by the spraying mechanism 7 through the nozzle 12 and reacts, and the pollutants are removed; the purified flue gas is finally discharged from the conical pipe cover at the top of the treatment tank 1, while the waste liquid generated by the reaction is collected at the bottom of the tank and discharged periodically through the valve.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A flue gas treatment device for an industrial boiler, comprising a treatment tank (1), characterized in that, The lower end of the left side surface of the treatment tank (1) is fixedly connected to a smoke inlet pipe (2) that communicates with its interior. The left end of the smoke inlet pipe (2) is fixedly connected to a pipe cover (3), and the inside of the smoke inlet pipe (2) is movably connected to a filter plate (4). Multiple fixing bolts (5) are movably connected through the outer edge of the left side surface of the filter plate (4), and the right end of the fixing bolt (5) is threadedly connected to a fixing block (6). A spraying mechanism (7) is provided in front of the treatment tank (1). The processing tank (1) is provided with a smoke distribution component (16) inside. The smoke distribution component (16) includes a smoke distribution plate (17). Multiple support rods (18) are movably connected through the outer edge of the smoke distribution plate (17). A support block (19) is fixedly connected to the lower end of the support rod (18). Multiple air pipes (20) are fixedly connected through the inside of the smoke distribution plate (17). Multiple air holes (21) are opened on the surface of the air pipes (20) above the smoke distribution plate (17). Inside the treatment tank (1), below the first smoke-spreading component (16), is a second smoke-spreading component (22).

2. The flue gas treatment device for an industrial boiler according to claim 1, characterized in that, The second smoke-making component (22) includes a mounting cover (23). The right side surface of the mounting cover (23) is fixed with a plurality of mounting tubes (24) that communicate with its interior. The lower surface of the mounting tubes (24) is provided with a plurality of air holes (25), and the upper surface of the mounting tubes (24) is provided with a plurality of disintegrating components (26).

3. The flue gas treatment device for an industrial boiler according to claim 2, characterized in that, The disintegrating component (26) includes a rotating rod (27), a rotating tube (28) is rotatably sleeved on the outside of the rotating rod (27), and a disintegrating plate (29) is fixedly connected to the upper end of the rotating rod (27), and an impeller (30) is fixedly connected to the lower end of the rotating rod (27).

4. The flue gas treatment device for an industrial boiler according to claim 3, characterized in that, The mounting cover (23) is fixed to the inside left side surface of the treatment tank (1) at the position opposite to the smoke inlet pipe (2). The rotating pipe (28) is fixed to the upper surface of the mounting pipe (24). The impeller (30) is located inside the mounting pipe (24).

5. The flue gas treatment device for an industrial boiler according to claim 1, characterized in that, The fixing block (6) is fixed to the inner surface of the smoke inlet pipe (2), and the support block (19) is fixed to the inner surface of the processing tank (1).

6. The flue gas treatment device for an industrial boiler according to claim 1, characterized in that, The spraying mechanism (7) includes a delivery pump (8) and a chemical tank (9) located in front of the delivery pump (8). The inlet end of the delivery pump (8) is connected to a pipe (10), which is connected to the inside of the chemical tank (9). The outlet end of the delivery pump (8) is fixedly connected to a pipe (11), which is fixedly connected to the upper end of the front surface of the treatment tank (1). The upper end of the pipe (11) is fixedly connected to a nozzle (12), which is located inside the treatment tank (1) and above the smoke distribution plate (17).

7. The flue gas treatment device for an industrial boiler according to claim 1, characterized in that, A heat exchange box (13) is installed on the left side of the processing tank (1). A heat exchange tube (14) is installed inside the heat exchange box (13). Both ends of the heat exchange tube (14) are fixed to the upper surface of the heat exchange box (13). A connecting pipe (15) is fixed to the right end of the heat exchange tube (14) and communicates with its interior. The other end of the connecting pipe (15) is fixed to the pipe cover (3).

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