A kind of domestic waste incineration desulfurization and denitrification purification device based on flue gas flow regulation

Abstract

This utility model discloses a desulfurization and denitrification purification device for municipal solid waste incineration based on flue gas flow regulation. It relates to the field of flue gas desulfurization, denitrification, and dust removal purification technology for municipal solid waste incinerators. Addressing the problem of the inability to dynamically adjust flue gas flow rate when treating municipal solid waste incineration flue gas, the device includes: a desulfurization and denitrification tower with an inlet fixedly connected to its outer side; an outlet fixedly connected to the top of the desulfurization and denitrification tower; multiple spray heads, all disposed inside the desulfurization and denitrification tower; a filter plate disposed below the spray heads, with its outer side fixedly connected to the inner wall of the desulfurization and denitrification tower; and an airflow regulation component disposed inside the desulfurization and denitrification tower. This utility model discloses a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation, which can dynamically regulate the flow rate distribution of flue gas, allowing the flue gas to contact the purification media such as the spray liquid more evenly and fully, reducing purification dead zones, and thus improving the overall purification efficiency of desulfurization and denitrification.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization, denitrification, dust removal and purification technology for municipal solid waste incinerators, and in particular to a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation. Background Technology

[0002] The desulfurization and denitrification purification device for municipal solid waste incineration mainly includes a dust removal device, a desulfurization device, and a denitrification device. It is used to remove sulfur dioxide and nitrogen oxides from the flue gas to ensure that the flue gas emissions meet strict environmental protection standards.

[0003] Existing desulfurization and denitrification devices cannot dynamically adjust the flue gas flow rate when treating municipal solid waste incineration flue gas. The contact time with desulfurization and denitrification media (such as spray liquid and catalyst) is short, the reaction is insufficient, and the pollutants cannot be effectively removed in time. As a result, the removal rate continues to decline, leading to excessive pollutants in the emitted flue gas. Utility Model Content

[0004] This utility model discloses a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation, which aims to solve the technical problem that existing devices cannot dynamically adjust the flue gas flow rate during desulfurization and denitrification purification, making it difficult to adapt to the optimal purification reaction requirements, resulting in low pollutant removal rate, excessive emissions, and environmental pollution.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation, comprising: a desulfurization and denitrification tower with a flue gas inlet fixedly connected to its outer side; a flue gas outlet fixedly connected to the top of the desulfurization and denitrification tower; multiple spray heads, all disposed inside the desulfurization and denitrification tower; a filter plate disposed below the spray heads, with its outer side fixedly connected to the inner wall of the desulfurization and denitrification tower; an airflow regulation component disposed inside the desulfurization and denitrification tower, located below the filter plate, the airflow regulation component being used to regulate the upward conveying of flue gas generated from municipal solid waste; and two flow-expanding components, both disposed below the airflow regulation component, both located inside the desulfurization and denitrification tower, the flow-expanding components being used to expand the conveying range of flue gas generated from municipal solid waste.

[0006] In a preferred embodiment, the airflow regulating assembly includes: a fixed frame, fixedly connected to the inner wall of the desulfurization and denitrification tower, with a movable shaft movably connected inside the fixed frame; a support plate, disposed above the fixed frame; and multiple rotating threaded blades, all fixedly connected to the top of the support plate.

[0007] In a preferred embodiment, a drive motor is installed on the outside of the desulfurization and denitrification tower. The power output shaft of the drive motor is connected to a rotating shaft via a coupling. Both the rotating shaft and the movable shaft are fixedly connected to pulleys at their bottom ends. A movable belt is wrapped around the rotating shaft and the movable shaft at their bottom ends. Two rectangular holes are opened on the outside of the desulfurization and denitrification tower, through which the movable belt passes. Two electric telescopic rods are fixedly connected to the top end of the movable shaft, and the top ends of the electric telescopic rods are fixedly connected to the bottom end of the support plate.

[0008] In a preferred embodiment, the flow amplification assembly includes: a base frame, the outer side of which is fixedly connected to the inner wall of the desulfurization and denitrification tower, and two connecting frames fixedly connected to the top of the base frame; multiple connecting plates, all fixedly connected to the inner wall of the desulfurization and denitrification tower and located above the base frame; and an arc-shaped flow amplification plate, disposed on the opposite side of the connecting frames, with the arc-shaped flow amplification plate located on the side of the connecting plates away from the desulfurization and denitrification tower.

[0009] In a preferred embodiment, a rotating rod is fixedly connected to the inner side of the bottom end of the arc-shaped diffuser plate. Both ends of the rotating rod are movably connected to the opposite side of the connecting frame. A telescopic drive rod is fixedly connected to the side of the multiple connecting frames near the arc-shaped diffuser plate, and the front end of the telescopic drive rod is fixedly connected to the side of the arc-shaped diffuser plate near the connecting frame. A return spring is fixedly connected to the side of the multiple connecting frames near the arc-shaped diffuser plate. The return springs are all located below the telescopic drive rods, and one end of the return spring is fixedly connected to the side wall of the arc-shaped diffuser plate near the rotating rod.

[0010] In a preferred embodiment, a sealed box is fixedly connected to the outside of the desulfurization and denitrification tower, the drive motor is installed inside the sealed box, and spray pipes are fixedly connected to the top of multiple spray heads. A ring-shaped water pipe is fixedly connected to the top of each spray pipe. A conveying pipe is fixedly connected to the outside of the ring-shaped water pipe. A circular hole is opened on the outside of the desulfurization and denitrification tower, and the outside of the conveying pipe is fixedly connected to the inside of the circular hole. A conveying pump is fixedly connected to the bottom of the conveying pipe, and the input end of the conveying pump is connected to the inner wall of the bottom of the desulfurization and denitrification tower. The output end of the conveying pump is connected to the conveying pipe. A demister is fixedly connected to the inner wall of the desulfurization and denitrification tower, and the demister is located above the ring-shaped water pipe.

[0011] As can be seen from the above, the desulfurization and denitrification purification device for municipal solid waste incineration based on flue gas flow regulation provided by this utility model has the technical effect of dynamically regulating the flow rate distribution of flue gas, making the flue gas more uniform and fully contact the purification media such as spray liquid, reducing purification dead zones, and thus improving the overall purification efficiency of desulfurization and denitrification. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation proposed in this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the desulfurization and denitrification tower of a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation proposed in this utility model;

[0014] Figure 3 This is a schematic diagram of the spray head structure of a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation proposed in this utility model.

[0015] Figure 4 This is a schematic diagram of the airflow regulation component structure of a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation proposed in this utility model;

[0016] Figure 5 This is a schematic diagram of the flow amplification component structure of a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation proposed in this utility model.

[0017] In the attached diagram: 1. Desulfurization and denitrification tower; 2. Flue gas inlet; 3. Flue gas outlet; 4. Conveying pipeline; 5. Conveying pump; 6. Sealing box; 7. Demister; 8. Annular water pipe; 9. Filter screen; 10. Airflow regulating assembly; 1001. Drive motor; 1002. Rotating shaft; 1003. Movable belt; 1004. Movable shaft; 1005. Electric telescopic rod; 1006. Fixed frame; 1007. Support plate; 1008. Rotating threaded blade; 11. Spray pipe; 12. Spray head; 13. Flow diffusing assembly; 1301. Base frame; 1302. Connecting frame; 1303. Rotating rod; 1304. Arc-shaped flow diffusing plate; 1305. Return spring; 1306. Connecting plate; 1307. Telescopic drive rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] The present invention discloses a municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation. It is mainly used in scenarios where existing devices cannot dynamically adjust the flue gas flow rate during desulfurization and denitrification purification, making it difficult to adapt to the optimal purification reaction requirements, resulting in low pollutant removal rate, excessive emissions, and environmental pollution.

[0020] Reference Figures 1-5A municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation includes: a desulfurization and denitrification tower 1 with a flue gas inlet 2 fixedly connected to its outer side; a flue gas outlet 3 fixedly connected to the top of the desulfurization and denitrification tower 1; multiple spray heads 12, all disposed inside the desulfurization and denitrification tower 1; a filter plate 9 disposed below the spray heads 12, with its outer side fixedly connected to the inner wall of the desulfurization and denitrification tower 1; an airflow regulation component 10 disposed inside the desulfurization and denitrification tower 1, located below the filter plate 9, and used to regulate the upward conveying of flue gas generated from municipal solid waste; and two flow expansion components 13, both disposed below the airflow regulation component 10, both located inside the desulfurization and denitrification tower 1, used to expand the conveying range of flue gas generated from municipal solid waste.

[0021] Reference Figure 1 , Figure 2 and Figure 4 In a preferred embodiment, the airflow regulating assembly 10 includes: a fixed frame 1006, which is fixedly connected to the inner wall of the desulfurization and denitrification tower 1, and a movable shaft 1004 is movably connected inside the fixed frame 1006; a support plate 1007, which is disposed above the fixed frame 1006; and a plurality of rotating threaded blades 1008, which are all fixedly connected to the top of the support plate 1007.

[0022] In this scheme, a drive motor 1001 is installed on the outside of the desulfurization and denitrification tower 1. The power output shaft of the drive motor 1001 is connected to a rotating shaft 1002 through a coupling. The bottom ends of the rotating shaft 1002 and the movable shaft 1004 are both fixedly connected to pulleys. The movable belt 1003 is wrapped around the movable belt 1003 at the bottom ends of the rotating shaft 1002 and the movable shaft 1004. Two rectangular holes are opened on the outside of the desulfurization and denitrification tower 1. The movable belt 1003 passes through the rectangular holes. Two electric telescopic rods 1005 are fixedly connected to the top end of the movable shaft 1004. The top ends of the electric telescopic rods 1005 are all fixedly connected to the bottom end of the support plate 1007.

[0023] The rotation of multiple rotating threaded blades 1008 in the airflow regulating component 10 can dynamically regulate the flow rate distribution of flue gas, making the flue gas more uniform and fully contact the purification media such as spray liquid, reducing purification dead zones, and thus improving the overall purification efficiency of desulfurization and denitrification.

[0024] Reference Figure 1 , Figure 2 and Figure 5In a preferred embodiment, the flow-expanding assembly 13 includes: a base frame 1301, the outer side of which is fixedly connected to the inner wall of the desulfurization and denitrification tower 1, and two connecting frames 1302 fixedly connected to the top of the base frame 1301; a plurality of connecting plates 1306, all fixedly connected to the inner wall of the desulfurization and denitrification tower 1 and located above the base frame 1301; and an arc-shaped flow-expanding plate 1304, disposed on the side opposite to the connecting frames 1302, with the arc-shaped flow-expanding plate 1304 located on the side of the connecting plates 1306 away from the desulfurization and denitrification tower 1.

[0025] In this design, a rotating rod 1303 is fixedly connected to the inner side of the bottom end of the arc-shaped diffuser plate 1304. Both ends of the rotating rod 1303 are movably connected to the opposite side of the connecting frame 1302. A telescopic drive rod 1307 is fixedly connected to the side of the multiple connecting frames 1302 near the arc-shaped diffuser plate 1304. The front end of the telescopic drive rod 1307 is fixedly connected to the side of the arc-shaped diffuser plate 1304 near the connecting frame 1302. A return spring 1305 is fixedly connected to the side of the multiple connecting frames 1302 near the arc-shaped diffuser plate 1304. The return spring 1305 is located below the telescopic drive rod 1307. One end of the return spring 1305 is fixedly connected to the side wall of the arc-shaped diffuser plate 1304 near the rotating rod 1303.

[0026] The angle of the flow-expanding component 13 is adjusted by the arc-shaped flow-expanding plate 1304 to expand the flue gas delivery range, so that the flue gas can come into contact with the absorbent, catalyst and other purification media in the desulfurization and denitrification tower 1 more evenly and fully, thereby increasing the reaction probability, enhancing the desulfurization and denitrification effect and reducing pollutant residues.

[0027] Reference Figures 1-5 In a preferred embodiment, a sealed box 6 is fixedly connected to the outside of the desulfurization and denitrification tower 1, the drive motor 1001 is installed inside the sealed box 6, and spray pipes 11 are fixedly connected to the top of each of the multiple spray heads 12. An annular water pipe 8 is fixedly connected to the top of each spray pipe 11. A conveying pipe 4 is fixedly connected to the outside of the annular water pipe 8. A circular hole is opened on the outside of the desulfurization and denitrification tower 1, and the outside of the conveying pipe 4 is fixedly connected to the inside of the circular hole. A conveying pump 5 is fixedly connected to the bottom of the conveying pipe 4, and the input end of the conveying pump 5 is connected to the inner wall of the bottom of the desulfurization and denitrification tower 1. The output end of the conveying pump 5 is connected to the conveying pipe 4. A demister 7 is fixedly connected to the inner wall of the desulfurization and denitrification tower 1, and the demister 7 is located above the annular water pipe 8.

[0028] Working principle: The flue gas generated by the incineration of municipal solid waste enters the desulfurization and denitrification tower 1 through the flue gas inlet 2 and the flow expansion component 13 below the airflow regulating component 10. By setting or adjusting the length of the telescopic drive rod 1307, the arc-shaped diffuser plate 1304 is driven to rotate around the rotating rod 1303 to the required angle (the return spring 1305 provides the return force or auxiliary stabilization). After the flue gas passes through the angle-optimized arc-shaped diffuser plate 1304, it is guided and diffused, forming a more uniform initial flow field on the cross-section of the tower. Before contacting the spray head 12, the flue gas undergoes preliminary dust filtration or airflow uniformity through the filter screen plate 9. The delivery pump 5 is started to extract the alkaline slurry stored at the bottom of the desulfurization and denitrification tower 1, and delivers it to the annular water pipe 8 through the delivery pipe 4. The slurry is distributed to the spray pipe 11 through the annular water pipe 8, and finally atomized and sprayed out by the spray head 12, making full contact with the upward-flowing flue gas, causing a chemical reaction, and removing pollutants such as sulfur and nitrate from the flue gas. During purification, the drive motor 10012 is started, and the power is driven by the movable belt 1003, which drives the movable shaft 1004 to rotate. 4. The rotation drives the pallet 1007 and its rotating threaded blade 1008 to rotate synchronously. The rotating threaded blade 1008 generates strong disturbance and swirling effect on the rising flue gas, disrupting the original airflow structure, promoting turbulent mixing of flue gas and spray droplets, and prolonging the effective residence time of flue gas in the reaction zone. At the same time, the height of the rotating threaded blade 1008 can be adjusted by the electric telescopic rod 1005 to change its disturbance intensity or area of ​​effect on the flue gas flow field. After the airflow is regulated and fully purified, the flue gas continues to rise. When it passes through the demister 7, the droplets carried in the flue gas are intercepted and separated. Finally, the purified flue gas is discharged from the desulfurization and denitrification tower 1 through the flue gas outlet 3, realizing the desulfurization and denitrification treatment of the flue gas from municipal solid waste incineration. The flow expansion component 13 optimizes the initial airflow distribution, the spray system provides the reaction medium, the airflow regulation component 10 precisely controls the reaction time, and the demister 7 ensures the dry emission of flue gas. All links work together to ensure purification efficiency and effect.

[0029] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation, characterized in that, include: A desulfurization and denitrification tower (1) is fixedly connected to an inlet (2) on its outer side; an outlet (3) is fixedly connected to the top of the desulfurization and denitrification tower (1); multiple spray heads (12) are all located inside the desulfurization and denitrification tower (1); a filter plate (9) is located below the spray head (12), and the outer side of the filter plate (9) is fixedly connected to the inner wall of the desulfurization and denitrification tower (1); an airflow regulating component (10) is located inside the desulfurization and denitrification tower (1), and the airflow regulating component (10) is located below the filter plate (9). The airflow regulating component (10) is used to regulate the upward conveying of flue gas generated by domestic waste; two flow expansion components (13) are both located below the airflow regulating component (10), and the flow expansion components (13) are both located inside the desulfurization and denitrification tower (1). The flow expansion components (13) are used to expand the range of conveying flue gas generated by domestic waste.

2. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 1, characterized in that, The airflow regulating component (10) includes: a fixed frame (1006), which is fixedly connected to the inner wall of the desulfurization and denitrification tower (1), and a movable shaft (1004) is movably connected inside the fixed frame (1006); a tray (1007), which is set above the fixed frame (1006); and multiple rotating threaded blades (1008), which are all fixedly connected to the top of the tray (1007).

3. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 2, characterized in that, A drive motor (1001) is provided on the outside of the desulfurization and denitrification tower (1). The power output shaft of the drive motor (1001) is connected to a rotating shaft (1002) through a coupling. The bottom ends of the rotating shaft (1002) and the movable shaft (1004) are both fixedly connected to pulleys. The movable belt (1003) is wrapped around the movable belt (1003) at the bottom end of the rotating shaft (1002) and the movable shaft (1004). Two rectangular holes are opened on the outside of the desulfurization and denitrification tower (1). The movable belt (1003) passes through the rectangular holes. Two electric telescopic rods (1005) are fixedly connected to the top end of the movable shaft (1004). The top ends of the electric telescopic rods (1005) are all fixedly connected to the bottom end of the support plate (1007).

4. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 1, characterized in that, The flow expansion assembly (13) includes: a base frame (1301), the outer side of which is fixedly connected to the inner wall of the desulfurization and denitrification tower (1), and two connecting frames (1302) fixedly connected to the top of the base frame (1301); multiple connecting plates (1306), all fixedly connected to the inner wall of the desulfurization and denitrification tower (1) and located above the base frame (1301); and an arc-shaped flow expansion plate (1304), which is located on the side opposite to the connecting frame (1302), and the arc-shaped flow expansion plate (1304) is located on the side of the connecting plate (1306) away from the desulfurization and denitrification tower (1).

5. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 4, characterized in that, A rotating rod (1303) is fixedly connected to the inner side of the bottom end of the arc-shaped diffuser plate (1304). Both ends of the rotating rod (1303) are movably connected to the opposite side of the connecting frame (1302). A telescopic drive rod (1307) is fixedly connected to the side of the multiple connecting frames (1302) near the arc-shaped diffuser plate (1304). The front end of the telescopic drive rod (1307) is fixedly connected to the side of the arc-shaped diffuser plate (1304) near the connecting frame (1302). A return spring (1305) is fixedly connected to the side of the multiple connecting frames (1302) near the arc-shaped diffuser plate (1304). The return spring (1305) is located below the telescopic drive rod (1307). One end of the return spring (1305) is fixedly connected to the side wall of the arc-shaped diffuser plate (1304) near the rotating rod (1303).

6. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 3, characterized in that, A sealed box (6) is fixedly connected to the outside of the desulfurization and denitrification tower (1). The drive motor (1001) is installed inside the sealed box (6). Spray pipes (11) are fixedly connected to the top of multiple spray heads (12). A ring water pipe (8) is fixedly connected to the top of each spray pipe (11).

7. The municipal solid waste incineration desulfurization and denitrification purification device based on flue gas flow regulation according to claim 6, characterized in that, A conveying pipe (4) is fixedly connected to the outside of the annular water pipe (8). A circular hole is opened on the outside of the desulfurization and denitrification tower (1). The outside of the conveying pipe (4) is fixedly connected to the inside of the circular hole. A conveying pump (5) is fixedly connected to the bottom end of the conveying pipe (4). The input end of the conveying pump (5) is connected to the inner wall of the bottom end of the desulfurization and denitrification tower (1). The output end of the conveying pump (5) is connected to the conveying pipe (4). A demister (7) is fixedly connected to the inner wall of the desulfurization and denitrification tower (1). The demister (7) is located above the annular water pipe (8).

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