Desulfurizing tower with large-flux anti-blocking nozzles

Abstract

The invention discloses a desulfurizing tower with a large-flux anti-blocking nozzle, and relates to the technical field of flue gas treatment.The desulfurizing tower comprises a tower body, an inlet and an outlet are formed in the tower body, an input pipe is arranged at the position of the inlet, a multi-stage spraying mechanism and an exhaust mechanism located on the uppermost portion are arranged in the tower body, and flue gas flows into the lower space in the tower body from the input pipe; under the exhaust action of the exhaust mechanism, flue gas sequentially penetrates through the multiple stages of spraying mechanisms and flows out from an outlet in the upper portion, when the flue gas passes through the multiple stages of spraying mechanisms, the spraying mechanisms spray outwards through nozzles and atomize a desulfurizing agent, the desulfurizing agent makes full contact with the flue gas, and flue gas desulfurization is achieved. In the invention, the spraying mechanism adopts a large-flux Venturi nozzle, and a conventional conical nozzle is replaced by the Venturi nozzle, so that the target of long-term operation is achieved, and the maintenance workload is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and specifically to a desulfurization tower with a large-throughput anti-blocking nozzle. Background Art

[0002] In the field of industrial waste gas treatment, a desulfurization tower is a key device for removing sulfur-containing gases such as sulfur dioxide from flue gas. The wet flue gas desulfurization process is widely used due to its high efficiency. Among them, the nozzle, as a core component, is responsible for atomizing the desulfurizing agent and spraying it into the countercurrent flue gas to achieve gas-liquid contact reaction. Existing desulfurization towers use nozzles in the form of spiral cones to atomize the desulfurizing agent in order to achieve full contact with the flue gas for desulfurization. However, impurities carried in the flue gas easily enter the spraying system along with the absorption liquid, and due to the structural characteristics of the conical nozzle, it is prone to blockage. Once blocked, it will increase the desulfurization cost at least, and in severe cases, it will cause the desulfurization tower to be forced to shut down. Currently, for the scaling problem, methods such as manual regular cleaning or nozzle replacement are mostly adopted, which seriously affects the desulfurization efficiency and cannot achieve the goal of long-term operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a desulfurization tower with a large-throughput anti-blocking nozzle to solve the problems raised in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A desulfurization tower with a large-throughput anti-blocking nozzle, including a tower body, an inlet and an outlet are arranged on the tower body, an input pipe is inclined at the inlet, an exhaust mechanism and a multi-stage spraying mechanism are arranged inside the tower body, the spraying mechanism sprays and atomizes the desulfurizing agent, and the flue gas enters the lower space inside the tower body from the input pipe. After passing through the multi-stage spraying mechanism, the exhaust mechanism discharges the flue gas from the outlet.

[0005] The exhaust mechanism includes a converging pipe installed on the tower body. One end of the converging pipe contracts inward to form a frustum-shaped space. An annular guide rail and a bearing are arranged above the converging pipe. The bearing and the guide rail are jointly connected to an exhaust fan. A plurality of exhaust fan blades are arranged in the exhaust fan. An exhaust motor for driving the exhaust fan to rotate is arranged on the converging pipe. The bearing and the guide rail enable the exhaust fan to rotate on the converging pipe.

[0006] One end of the exhaust fan extends outward to form a platform, and a circle of tooth grooves is arranged on the platform. The exhaust motors are symmetrically distributed on both sides of the exhaust fan. A first bevel gear is arranged on the motor shaft of the exhaust motor, and the first bevel gear meshes with the platform through the tooth grooves for transmission; Above the exhaust fan, there is a cross, and in the middle of the cross, there is a cylindrical shaft seat. A rotating shaft is arranged in the exhaust fan blade. One end of the rotating shaft is rotatably installed on the shaft seat, and the other end of the rotating shaft passes through the exhaust fan and is installed with a bevel gear II. On the platform of the exhaust fan, there is a hollow rotating disk, and at the output end of the hollow rotating disk, there is an annular gear disk. The gear disk is meshed and driven with the bevel gear II. A sleeve is sleeved outside the exhaust fan. When discharging flue gas outward, the exhaust motor drives the exhaust fan to rotate through the bevel gear I and the platform, and the exhaust fan drives the exhaust fan blade to rotate, and the flue gas is discharged from the tower body by using the exhaust fan blade. When it is necessary to change the discharge rate, in addition to changing the rotation speed of the exhaust motor, the hollow rotating disk can also be driven, so that the hollow rotating disk drives the rotating shaft to rotate by using the gear disk, and further adjusts the inclination angle of the exhaust fan blade in the exhaust fan.

[0007] A transmission pipe is arranged on the tower body. The spraying mechanism includes an annular main pipe installed inside the tower body, branch pipes that are cross-connected and arranged inside the main pipe, and nozzles arranged at the cross points of the branch pipes. The branch pipes are communicated with the main pipe, and the main pipe is communicated with the transmission pipe.

[0008] Below the main pipe, there is a gas-gathering ring connected to the tower body. One end of the gas-gathering ring contracts inward. Above the main pipe, there is a cover plate connected to the tower body. One section of the nozzle has a diameter contraction and forms a contraction part. The gas-gathering ring is used to gather the flue gas, so that the flue gas converges below the nozzle, improving the flue gas desulfurization effect.

[0009] The nozzle is of a Venturi nozzle structure, and the material of the nozzle is fiberglass. When the flue gas passes through the nozzle, the nozzle sprays outwards and atomizes the desulfurization agent, and the desulfurization agent is in full contact with the flue gas, realizing the desulfurization of the flue gas. Using a large-flux Venturi nozzle to replace the conventional conical nozzle achieves the goal of long-term operation and reduces the maintenance workload.

[0010] The nozzle has a Laval nozzle structure. At the inlet of the nozzle, there are multiple guide vanes with a torsional angle. One end of each guide vane is commonly connected to a middle pipe. One end of the middle pipe is tapered. The middle pipe is connected to a swirl cone through a guide rod. The swirl cone is located on one side of the contraction section. The cross-section of the swirl cone is diamond-shaped. On the outer surface of the end of the swirl cone close to the guide rod, there are multiple arc-shaped force plates with a torsional angle. When the desulfurization agent passes through the guide vanes, under the guidance of the guide vanes, the desulfurization agent is initially guided to generate swirl in the nozzle. The force plates on the surface of the swirl cone are used to bear the impact force of the desulfurization agent. Under the action of the impact force, the force plates drive the swirl cone to rotate, and indirectly drive the atomized desulfurization agent to generate swirl through the rotation of the swirl cone. At the same time, the force plates increase the force-bearing area of the swirl cone, causing the swirl cone to move downward under the impact of the desulfurization agent. When the fast-flowing desulfurization agent passes through the upper half of the swirl cone, a negative pressure area will be formed outside the lower half of the swirl cone. But under the negative pressure attraction of the negative pressure area, after the atomized desulfurization agent passes the maximum diameter at the middle position of the swirl cone, the atomized desulfurization agent will automatically fill the negative pressure area, thereby enabling the atomized desulfurization agent to completely fill the entire nozzle, so that there will be no blank area without desulfurization agent when the nozzle sprays the desulfurization agent.

[0011] The inside of the middle pipe is hollow. One end of the guide rod is inserted into the middle pipe. The end of the guide rod inserted into the middle pipe extends outward a flat plate. Inside the middle pipe, there is a spring. The spring is sleeved on the guide rod and abuts against the flat plate and the middle pipe. The guide rod is a hollow structure. A connecting chain is rotatably arranged in the middle of the middle pipe. The connecting chain passes through the guide rod and one end is connected to a configuration rod. The diameter of the configuration rod is equal to the inner diameter of the guide rod. The inside of the swirl cone is hollow and there is an opening at one end. The configuration rod extends into the swirl cone through the opening. Multiple chains are strung at the position of the guide rod close to the contraction section. The length of the chain is less than the length of the configuration rod; When the spring is compressed, under the traction of the connecting chain, the configuration rod enters the guide rod and is located inside the position where the chain is located; When the spring is at its original length, the configuration rod leaves the configuration rod under its own gravity and enters the swirl cone, and is in an inclined state inside the swirl cone. When the desulfurization agent is not ejected, the swirl cone and the force-bearing plate do not bear external impact force. Under the elastic support of the spring, the guide rod pulls the swirl cone to the outlet side of the contraction part through the chain. When the desulfurization agent is ejected, the desulfurization agent enters the nozzle through the branch pipe and generates an impact force on the swirl cone and the force-bearing plate in the contraction part. Under the action of the impact force, the swirl cone moves downward and rotates under the drive of the force-bearing plate. The rotating swirl cone drives the atomized desulfurization agent to generate a swirl. After the desulfurization tower operates for a certain period of time, the supply of the desulfurization agent is temporarily stopped. After losing the impact of the desulfurization agent, under the support of the spring, the swirl cone resets. During the reset process, the swirl cone still rotates under the action of inertia. When the configuration rod falls into the swirl cone and is in an inclined state, the configuration rod changes the center of gravity of the swirl cone, thereby changing the rotation posture of the swirl cone, causing the swirl cone to tilt during rotation. The tilted swirl cone impacts on the contraction part, reducing or separating the adhesion of impurities in the contraction part through the impact. Through the desulfurization agent introduced again, the impurities are washed away from the contraction part, realizing the cleaning of the impurities in the nozzle and preventing the nozzle from being blocked by impurities.

[0012] When the swirl cone is impacted by the desulfurization agent and moves downward, due to the inability of the connecting chain to stretch, under the pulling and traction of the connecting chain, the configuration rod enters the guide rod and is located at the position of the chain, docking the two sections of the guide rod to prevent the two sections of the guide rod from swinging due to the chain, so that the swirl cone can stably swirl and not swing under the impact of the desulfurization agent.

[0013] After the swirl cone is not impacted by the desulfurization agent, under the action of the self-weight of the configuration rod and the elastic support of the spring, the swirl cone gradually resets, and the configuration rod gradually enters the interior of the swirl cone. When the configuration rod separates from the guide rod and enters the swirl cone, after the center of gravity of the swirl cone shifts, through the setting of the chain, it is convenient for the swirl cone to change the rotation state and be in an inclined posture.

[0014] When the flue gas contacts the atomized desulfurization agent, since the atomized desulfurization agent generates a swirl under the guidance of the swirl cone, it will generate a tangential attraction force on the flue gas, further increasing the chance of contact between the flue gas and the desulfurization agent, and obtaining a downward moving power when ejected. Using the downward power and the tangential attraction force, the flue gas is further carried downward into the lower space inside the tower body, making the flue gas stay in the tower body further, increasing the time of the flue gas in the tower body, and improving the flue gas desulfurization effect.

[0015] The inner end face of the swirl cone is a curved surface, and a drain port is provided at the lower end of the swirl cone. The drain port is used to discharge the desulfurization agent existing inside the swirl cone.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. When the flue gas passes through the nozzle, the nozzle sprays outwards and atomizes the desulfurizer. The desulfurizer comes into full contact with the flue gas, achieving the desulfurization of the flue gas. The use of a large-throughput Venturi nozzle to replace the conventional conical nozzle has achieved the goal of long-term operation and reduced the maintenance workload.

[0017] 2. When spraying the desulfurizer, the swirl cone causes the atomized desulfurizer to generate a swirl, creating a tangential attraction and a downward impact force of the swirling desulfurizer on the flue gas. Utilizing the downward power and the tangential attraction, the flue gas is further carried towards the lower space inside the tower body, causing the flue gas to stay in the tower body for a longer time and increasing the time of the flue gas in the tower body, thereby improving the flue gas desulfurization effect.

[0018] When cleaning the nozzle, the supply of the desulfurizer is stopped. Under the action of inertia, the swirl cone can still rotate briefly for a certain period of time. The configuration rod changes the center of gravity of the swirl cone, causing the swirl cone to tilt during rotation. The tilted swirl cone impacts on the contraction part, reducing or separating the adhesion of impurities on the contraction part through the impact. Through the desulfurizer introduced again, the impurities are washed away from the contraction part, realizing the cleaning of the nozzle impurities and preventing the nozzle from being blocked by impurities. Description of the Drawings

[0019] Figure 1 Is a three-dimensional view of the overall structure of the present invention; Figure 2 Is a three-dimensional view of the exhaust mechanism of the present invention installed on the tower body; Figure 3 Is a three-dimensional view of the spraying mechanism of the present invention installed on the tower body; Figure 4 Is a front half-sectional view of the spraying mechanism of the present invention installed inside the tower body (Embodiment 2); Figure 5 Is an exploded view of the spraying mechanism of the present invention (Embodiment 2); Figure 6 Is a three-dimensional view of the nozzle of the present invention (Embodiment 2); Figure 7 Is a front half-sectional view of the nozzle of the present invention (Embodiment 2); Figure 8 Is a three-dimensional view of the exhaust mechanism of the present invention; Figure 9 Is an exploded view of the exhaust mechanism of the present invention.

[0020] In the figure: 1. Tower body; 2. Input pipe; 3. Transmission pipe; 4. Exhaust mechanism; 5. Main pipe; 6. Branch pipe; 7. Nozzle; 8. Gas-gathering ring; 9. Cover plate; 10. Deflector; 11. Middle pipe; 12. Swirl cone; 13. Guide rod; 14. Configuration rod; 15. Converging pipe; 16. Exhaust motor; 17. Exhaust fan; 18. Hollow rotating disk; 19. Sleeve; 20. Exhaust fan blade; 21. Gear disk. Specific Embodiments

[0021] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment: As Figure 1 - Figure 9 shown, the present invention provides a technical solution, a desulfurization tower with a large-throughput anti-blocking nozzle, including a tower body 1, an inlet and an outlet are arranged on the tower body 1, an input pipe 2 is inclined at the inlet, an exhaust mechanism 4 and a multi-stage spraying mechanism are arranged inside the tower body 1, the spraying mechanism sprays and atomizes the desulfurizing agent, and the flue gas enters the lower space inside the tower body 1 from the input pipe 2. After passing through the multi-stage spraying mechanism, the exhaust mechanism 4 discharges the flue gas from the outlet.

[0023] The exhaust mechanism 4 includes a converging pipe 15 installed on the tower body 1. One end of the converging pipe 15 contracts inward to form a frustum-shaped space. An annular guide rail and a bearing are arranged above the converging pipe 15. The bearing and the guide rail are jointly connected with an exhaust fan 17, and the bearing and the guide rail enable the exhaust fan 17 to rotate on the converging pipe 15.

[0024] One end of the exhaust fan 17 extends outward with a platform, and a circle of tooth grooves is arranged on the platform. An exhaust motor 16 for driving the exhaust fan 17 to rotate is arranged on the converging pipe 15. The exhaust motors 16 are symmetrically distributed on both sides of the exhaust fan 17. A first bevel gear is arranged on the motor shaft of the exhaust motor 16, and the first bevel gear is in meshing transmission with the platform through the tooth grooves.

[0025] A plurality of exhaust fan blades 20 are arranged in the exhaust fan 17. A cross is arranged above the exhaust fan 17. A cylindrical shaft seat is arranged in the middle of the cross. A rotating shaft is arranged in the exhaust fan blade 20. One end of the rotating shaft is rotatably installed on the shaft seat, and the other end of the rotating shaft passes through the exhaust fan 17 and is installed with a second bevel gear. A hollow rotating disk 18 is arranged on the platform of the exhaust fan 17. An annular gear disk 21 is arranged at the output end of the hollow rotating disk 18. The gear disk 21 is in meshing transmission with the second bevel gear. A sleeve 19 is sleeved outside the exhaust fan 17. When discharging the flue gas outward, the exhaust motor 16 drives the exhaust fan 17 to rotate through the first bevel gear and the platform, and the exhaust fan 17 drives the exhaust fan blades 20 to rotate, and the flue gas is discharged from the tower body 1 by using the exhaust fan blades 20. When it is necessary to change the discharge rate, in addition to changing the rotation speed of the exhaust motor 16, the hollow rotating disk 18 can also be driven to enable the hollow rotating disk 18 to drive the rotating shaft to rotate by using the gear disk 21, thereby adjusting the inclination angle of the exhaust fan blades 20 in the exhaust fan 17.

[0026] A transfer pipe 3 is provided on the tower body 1. The spraying mechanism includes an annular main pipe 5 installed inside the tower body 1, cross-connected branch pipes 6 provided on the inner side of the main pipe 5, and nozzles 7 provided at the intersection points of the branch pipes 6. The branch pipes 6 are communicated with the main pipe 5, and the main pipe 5 is communicated with the transfer pipe 3.

[0027] An air-gathering ring 8 connecting the tower body 1 is provided below the main pipe 5, one end of the air-gathering ring 8 contracts inward, a cover plate 9 connecting the tower body 1 is provided above the main pipe 5, and one section of the nozzle 7 has a diameter contraction to form a contraction part. Embodiment

[0028] The nozzle 7 is of a Venturi nozzle structure, and the material of the nozzle 7 is fiberglass. When the flue gas passes through the nozzle 7, the nozzle 7 sprays outwards and atomizes the desulfurizer, and the desulfurizer is in full contact with the flue gas to achieve desulfurization of the flue gas. The use of a large-flux Venturi nozzle to replace the conventional conical nozzle achieves the goal of long-term operation and reduces the maintenance workload. Embodiment

[0029] The nozzle 7 is of a Laval nozzle structure. A plurality of guide plates 10 with a torsional angle are provided at the inlet of the nozzle 7. When the desulfurizer passes through the guide plates 10, under the guidance of the guide plates 10, the desulfurizer is initially guided to generate a swirl in the nozzle 7. One end of the guide plates 10 is commonly connected to a middle pipe 11. One end of the middle pipe 11 is conical. The middle pipe 11 is connected to a swirl cone 12 through a guide rod 13. The swirl cone 12 is located on one side of the contraction part. The cross-section of the swirl cone 12 is diamond-shaped, the inner end face of the swirl cone 12 is a curved surface, and a drain port is provided at the lower end of the swirl cone 12. A plurality of arc-shaped force-bearing plates with a torsional angle are provided on the outer surface of the swirl cone 12 near one end of the guide rod 13. The force-bearing plates on the surface of the swirl cone 12 are used to bear the impact force of the desulfurizer. Under the action of the impact force, the force-bearing plates drive the swirl cone 12 to rotate, and indirectly drive the atomized desulfurizer to generate a swirl through the rotation of the swirl cone 12. The force-bearing plates increase the force-bearing area of the swirl cone 12, so that the swirl cone 12 moves downward under the impact of the desulfurizer.

[0030] The middle pipe 11 is hollow inside. One end of the guide rod 13 is inserted into the middle pipe 11. One end of the guide rod 13 inserted into the middle pipe 11 extends outwards into a flat plate. A spring is provided inside the middle pipe 11. The spring is sleeved on the guide rod 13 and abuts against the flat plate and the middle pipe 11. The guide rod 13 is of a hollow structure. A connecting chain is rotatably provided in the middle of the middle pipe 11. The connecting chain passes through the guide rod 13 and one end is connected to a configuration rod 14. The diameter of the configuration rod 14 is equal to the inner diameter of the guide rod 13. The inside of the swirl cone 12 is hollow and one end is provided with an opening. The configuration rod 14 extends into the swirl cone 12 through the opening. A plurality of chains are connected in series at a position of the guide rod 13 close to the contraction part. The chains divide the guide rod 13 into two sections. The length of the chains is less than the length of the configuration rod 14; When the spring is compressed, under the traction of the connecting chain, the configuration rod 14 enters the guide rod 13 and is located inside the position where the chains are located; When the spring is at its original length, the configuration rod 14 leaves the configuration rod 14 under its own gravity and enters the swirl cone 12, and is in an inclined state within the swirl cone 12.

[0031] When the desulfurizing agent is not ejected, the swirl cone 12 and the force-bearing plate do not bear external impact forces. The spring is at its original length. Under the elastic support of the spring, the guide rod 13 pulls the swirl cone 12 to be located on the outlet side of the contraction part through a chain.

[0032] When the desulfurizing agent is ejected, the desulfurizing agent enters the nozzle 7 through the branch pipe 6. When the fast-flowing desulfurizing agent passes through the upper half of the swirl cone 12, a negative pressure area will be formed on the outer side of the lower half of the swirl cone 12. However, under the negative pressure attraction of the negative pressure area, after the atomized desulfurizing agent passes over the maximum diameter at the middle position of the swirl cone 12, the atomized desulfurizing agent will automatically fill the negative pressure area, and then the atomized desulfurizing agent completely fills the entire nozzle 7, so that there will be no blank area without desulfurizing agent when the nozzle 7 ejects the desulfurizing agent; The desulfurizing agent generates an impact force on the swirl cone 12 and the force-bearing plate in the contraction part. Under the action of the impact force, the swirl cone 12 moves downward and rotates under the drive of the force-bearing plate. The rotating swirl cone 12 drives the atomized desulfurizing agent to generate a swirl; When the flue gas contacts the atomized desulfurizing agent, since the atomized desulfurizing agent generates a swirl under the guidance of the swirl cone 12, a tangential attraction force will be generated on the flue gas, further increasing the contact probability between the flue gas and the desulfurizing agent. Moreover, the desulfurizing agent obtains a downward moving power when it is ejected. Using the downward power and the tangential attraction force, the flue gas is further carried downward into the lower space inside the tower body 1, so that the flue gas stays in the tower body 1 for a longer time, increasing the time of the flue gas in the tower body 1 and improving the flue gas desulfurization effect.

[0033] After the desulfurization tower operates for a certain period of time, the supply of the desulfurizing agent is temporarily stopped. After losing the impact of the desulfurizing agent, under the support of the spring, the swirl cone 12 resets. During the reset process, the swirl cone 12 still rotates under the action of inertia. When the configuration rod 14 falls into the swirl cone 12 and is in an inclined state, the configuration rod 14 changes the center of gravity of the swirl cone 12, and then changes the rotation posture of the swirl cone 12, so that the swirl cone 12 tilts during the rotation process. The tilted swirl cone 12 impacts on the contraction part, and through the impact, the adhesion of impurities in the contraction part is reduced or separated. Through the desulfurizing agent re-introduced, the impurities are washed away from the contraction part, realizing the cleaning of the impurities in the nozzle 7 and preventing the nozzle 7 from being blocked by impurities.

[0034] Working principle of the present invention: The flue gas to be desulfurized is sent into the lower space inside the tower body 1 through the input pipe 2. The exhaust motor 16 drives the exhaust fan 17 to rotate through the first bevel gear and the platform. The exhaust fan 17 drives the exhaust fan blades 20 to rotate. The exhaust fan blades 20 generate traction on the flue gas in the lower part inside the tower body 1, causing the flue gas to flow upward in the tower body 1. After flue gas desulfurization, the flue gas is finally discharged from the tower body 1 through the exhaust fan 17. When it is necessary to change the discharge rate, in addition to changing the rotation speed of the exhaust motor 16, the hollow rotating disk 18 can also be driven, so that the hollow rotating disk 18 drives the rotating shaft to rotate by using the gear disk 21, and then the inclination angle of the exhaust fan blades 20 in the exhaust fan 17 can be adjusted.

[0035] During the upward flow of the flue gas, the gas-gathering ring 8 gathers the flue gas, causing the flue gas to converge below the nozzle 7. When the flue gas passes through the nozzle 7, the nozzle 7 sprays out atomized desulfurizing agent, enabling the desulfurizing agent to contact the flue gas and achieving desulfurization of the flue gas.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A desulfurization tower with a large flux anti-blocking nozzle, characterized in that: The tower body (1) comprises a tower body (1), wherein an inlet and an outlet are arranged on the tower body (1), an inlet pipe (2) is arranged obliquely at the inlet, an exhaust mechanism (4) and a multi-stage spray mechanism are arranged inside the tower body (1), the spray mechanism sprays and atomizes a desulfurizing agent, and the flue gas enters the lower space inside the tower body (1) from the inlet pipe (2), passes through the multi-stage spray mechanism, and the exhaust mechanism (4) discharges the flue gas from the outlet.

2. A desulfurization tower with a large flux anti-blocking nozzle according to claim 1, characterized in that: The exhaust mechanism (4) comprises a converging pipe (15) mounted on the tower body (1), one end of the converging pipe (15) being contracted inwardly to form a truncated cone-shaped space, an annular guide rail and a bearing being arranged above the converging pipe (15), the bearing and the guide rail being connected together with an exhaust fan (17), a plurality of exhaust fan blades (20) being arranged in the exhaust fan (17), and an exhaust motor (16) for driving the exhaust fan (17) to rotate being arranged on the converging pipe (15).

3. A desulfurization tower with a large flux anti-blocking nozzle according to claim 2, characterized in that: A platform is extended outward from one end of the exhaust fan (17), a circle of tooth grooves is arranged on the platform, the exhaust motor (16) is symmetrically distributed on both sides of the exhaust fan (17), a bevel gear 1 is arranged on the motor shaft of the exhaust motor (16), and the bevel gear 1 is meshed with the platform through the tooth grooves for transmission; A cross is arranged above the exhaust fan (17), and a cylindrical shaft seat is arranged in the middle of the cross. A rotating shaft is arranged in the exhaust fan blade (20), one end of the rotating shaft is rotatably mounted on the shaft seat, and the other end of the rotating shaft passes through the exhaust fan (17) and is mounted with a second bevel gear. A hollow rotating disk (18) is arranged on the platform of the exhaust fan (17), and an annular gear disk (21) is arranged at the output end of the hollow rotating disk (18), and the gear disk (21) is meshed with the second bevel gear for transmission. A sleeve (19) is sleeved on the outside of the exhaust fan (17).

4. A desulfurization tower with a large flux anti-blocking nozzle according to claim 1, characterized in that: The tower body (1) is provided with a transmission pipe (3), and the spray mechanism comprises an annular main pipe (5) installed inside the tower body (1), cross-connected branch pipes (6) arranged inside the main pipe (5), and nozzles (7) arranged at the intersections of the branch pipes (6), the branch pipes (6) being connected to the main pipe (5), and the main pipe (5) being connected to the transmission pipe (3).

5. A desulfurization tower with a large flux anti-blocking nozzle according to claim 4, characterized in that: An air gathering ring (8) connected to the tower body (1) is arranged below the main pipe (5), one end of the air gathering ring (8) is contracted inwardly, a cover plate (9) connected to the tower body (1) is arranged above the main pipe (5), and a section of the nozzle (7) is contracted in diameter to form a contraction portion.

6. A desulfurization tower with a large flux anti-blocking nozzle according to claim 5, characterized in that: The nozzle (7) is a Venturi nozzle structure, and the material of the nozzle (7) is glass fiber reinforced plastic.

7. A desulfurization tower with a large flux anti-blocking nozzle according to claim 5, characterized in that: The nozzle (7) is a Laval nozzle structure. A plurality of guide plates (10) with a twist angle are arranged at the inlet of the nozzle (7). One end of the guide plates (10) is commonly connected to a middle tube (11). One end of the middle tube (11) is conical. The middle tube (11) is connected to a swirl cone (12) via a guide rod (13). The swirl cone (12) is located on one side of the contraction portion. The cross section of the swirl cone (12) is rhombus-shaped. The outer surface of one end of the swirl cone (12) close to the guide rod (13) is provided with a plurality of arc-shaped force-bearing plates with a twist angle.

8. A desulfurization tower with a large flux anti-blocking nozzle according to claim 7, characterized in that: The middle tube (11) is hollow inside, one end of the guide rod (13) is inserted into the middle tube (11), and one end of the guide rod (13) inserted into the middle tube (11) extends outwardly to form a flat plate. A spring is provided inside the middle tube (11), and the spring is sleeved on the guide rod (13) and abuts against the flat plate and the middle tube (11). The guide rod (13) is a hollow structure. A connecting chain is rotatably provided in the middle of the middle tube (11), and the connecting chain passes through the guide rod (13) and is connected to a configuration rod (14) at one end. The diameter of the configuration rod (14) is equal to the inner diameter of the guide rod (13). The swirl cone (12) is hollow inside and is provided with an opening at one end. The configuration rod (14) extends into the swirl cone (12) through the opening. A plurality of chains are connected in series at a position of the guide rod (13) near the contraction portion, and the length of the chain is less than the length of the configuration rod (14). When the spring is compressed, under the traction of the connecting chain, the configuration rod (14) enters the guide rod (13) and is located on the inner side of the position where the chain is located; When the spring is at its original length, the configuration rod (14) leaves the configuration rod (14) under the action of its own weight and enters the swirl cone (12), and is in an inclined state in the swirl cone (12).

9. A desulfurization tower with a large flux anti-blocking nozzle according to claim 8, characterized in that: The inner end surface of the swirl cone (12) is a curved surface, and a discharge port is provided at the lower end of the swirl cone (12).

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