High-temperature desulfurization and dust removal device

Abstract

The invention discloses a high-temperature desulfurization and dust removal device, and relates to the technical field of industrial flue gas purification, the high-temperature desulfurization and dust removal device comprises a tank body, the tank body is used as a reaction space main body, the lower part of the side wall of the tank body is provided with a gas inlet, the gas inlet is provided with an induction type cover plate, and the induction type cover plate is used for detecting the flow and flow velocity of gas entering a tower in real time, outputting an electric signal and feeding back the electric signal to a control system; the self-adaptive adjusting spraying mechanism is arranged in the upper area of the tank body and comprises a spiral spraying pipe, spraying holes and an electric control telescopic rod; the spraying holes are symmetrically distributed on one side of the spiral spraying pipe and directionally spray towards the central area of the tower body; the electric control telescopic rod is connected between the connecting frame and the spiral spraying pipe, receives signal input from the induction type cover plate, drives the connecting frame to adjust the space posture of the spiral spraying pipe when it is detected that the air inlet amount is increased, enables the spiral spraying pipe to incline towards the central axis, and meanwhile increases the liquid supply proportion of the central side cavity. And the spraying key point is concentrated on a high-density airflow core area.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas purification technology, and in particular to a high-temperature desulfurization and dust removal device. Background Technology

[0002] Industrial flue gas purification systems typically utilize high-temperature desulfurization and dust removal devices, most of which employ wet desulfurization and dust removal towers. These towers are primarily used to remove sulfur dioxide and suspended particulate matter from flue gas. Their basic working principle involves installing multiple layers of spray devices within the tower to atomize alkaline absorbent liquid (such as limestone slurry or NaOH solution) into fine droplets. These droplets come into counter-current contact with the upward-flowing flue gas, achieving both chemical absorption of sulfur dioxide and physical capture of dust, thus achieving a synergistic effect of desulfurization and dust removal.

[0003] However, in actual operation, existing wet desulfurization and dust removal towers still have significant defects in terms of gas-liquid mass transfer efficiency, operational stability and adaptability to operating conditions. In particular, these defects are reflected in the spatial distribution characteristics of the spray system, the reliability of key components and dynamic response capabilities, which seriously restrict the overall performance of the system.

[0004] First, during the use of existing spray systems, the amount of gas that the dust removal tower needs to process varies at different stages of use, which requires adaptive changes in the spray volume. However, existing spray devices cannot automatically adjust the spray volume according to the air intake volume. Secondly, as a key component for achieving efficient atomization, the nozzle is constantly exposed to a high-solids, highly corrosive slurry environment, making it extremely prone to wear and scaling blockage. Undissolved CaCO3 or precipitated CaSO4 crystals in the slurry can deposit on the inner wall of the nozzle, leading to a reduction in the outlet orifice diameter or even complete blockage. Existing nozzles cannot perform automatic cleaning. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The present invention provides a high-temperature desulfurization and dust removal device to solve the technical problems that existing high-temperature desulfurization and dust removal devices have some unreasonable aspects due to their own structural characteristics during use.

[0006] The present invention adopts the following technical solution: a high-temperature desulfurization and dust removal device, comprising: a tank body, the tank body serving as the main body of the reaction space, an air inlet provided on the lower part of its side wall, and an inductive cover plate provided at the air inlet for real-time detection of the gas flow rate entering the tower and outputting an electrical signal to the control system. An adaptive spraying mechanism is located in the upper part of the tank and includes a spiral spray pipe and an electrically controlled telescopic rod. The spiral spray pipe has spray holes evenly distributed on one side, which are directional sprays facing the center of the tower. The working end of the electrically controlled telescopic rod is linked to the tail end of the spiral spray pipe to drive the spiral spray pipe to adjust its extension and retraction. When an increase in air intake is detected, the spiral spray pipe is driven to extend, and the liquid supply ratio is increased at the same time, so that the spraying focus is concentrated on the core area of ​​the high-density airflow. The self-cleaning nozzle mechanism is equidistantly distributed on the spiral spray pipe. The self-cleaning nozzle mechanism includes a first spray port, an adjusting plate, a second spray port, and a connecting column. The first spray port is located at the bottom of the self-cleaning nozzle mechanism, and the adjusting plate and the connecting column are located inside the self-cleaning nozzle mechanism. The second spray port is opened on the adjusting plate, and the first and second spray ports work together to form a total spray port. The opening and closing states of the first and second spray ports are dynamically adjusted by the adjusting plate rotating in conjunction with the connecting column.

[0007] Furthermore, the tank is equipped with a separation plate inside, which is used to guide the flow direction of the gas-liquid mixture and achieve preliminary droplet capture.

[0008] Furthermore, the spiral spray pipe is fixed to the tank body by a mounting bracket, and one end of it is connected to the liquid inlet pipe; the separation baffle is set inside the spiral spray pipe and extends axially to divide the space inside the pipe into two independent chambers, which are respectively connected to liquid supply branches of different pressure levels or agent types.

[0009] Furthermore, the spiral spray pipe is made of a plastic and deformable material, which enables it to deform. The cross-section of the spiral spray pipe is smaller at the top and larger at the bottom, with an arc transition in the middle. The spray holes are opened on the inner side of the spiral spray pipe, and the inner side of the spiral spray pipe is made of an elastic material. Each layer of spiral spray pipe overlaps and squeezes each other to achieve the blocking effect of the spray holes.

[0010] Furthermore, the self-cleaning nozzle mechanism includes a mounting base and a connecting base. The mounting base is connected to the connecting base, and two vertical guide blocks are provided on the inner side of the mounting base to limit and guide movement. Several first spray nozzles are provided at the bottom of the connecting base. A connecting column is provided inside the mounting base, and an adjusting plate is provided at the bottom of the connecting column. A second spray nozzle is provided on the adjusting plate. The second spray nozzles cooperate with each other to form a complete spray nozzle. The adjusting plate is rotatably connected to the mounting base. A guide groove is provided on the connecting column. A movable plate limited by the guide blocks is provided on the outer sleeve of the connecting column. A guide ball is provided inside the movable plate. The guide ball cooperates with the guide groove. The movable plate divides the internal cavity formed by the mounting base and the connecting base into upper and lower parts.

[0011] Furthermore, the guide groove has an inclination angle greater than 70°.

[0012] Furthermore, a connecting spring is provided between the movable plate and the inner top of the mounting base. The branch pipe is located above the movable plate, and an adjustment cavity is provided at the connection between the branch pipe and the mounting base. The adjustment cavity contains a movable seat and a spring plate, and the movable plate can be moved by pressing the movable seat.

[0013] Furthermore, the connecting chamber is connected to the spiral spray pipe via a first connecting pipe, and a branch pipe is provided on the first connecting pipe. Control valves are provided on the first connecting pipe and the branch pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, when nozzles operate in a high-solids-content slurry environment for a long time, scaling and blockage or flow channel wear inevitably occur, leading to increased atomized particle size and spray deviation, which affects desulfurization and dust removal performance. By setting a self-cleaning nozzle mechanism, the nozzle can automatically monitor the internal pressure during operation (if the nozzle is blocked, the internal flow pressure will change under the same flow rate, and this change can be used to determine whether the nozzle is blocked). Once an abnormality is detected, a precise positioning high-pressure pulse flushing program is immediately triggered to perform short-term high-intensity cleaning only on the target nozzle, while cooperating with the internal flow channel to facilitate self-cleaning. Secondly, during use, the air intake situation inside the tower can be detected and judged. When the air intake is larger, the final spray volume will also change accordingly. At the same time, the spraying is mainly concentrated on the central area (because as the air intake is larger, the density in the central area is larger, so it is necessary to focus on spraying the central area). This allows the final overall spray volume to be adjusted according to the change in air intake. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main structure of the tank body of the present invention; Figure 2 This is a schematic cross-sectional view of the tank body of the present invention; Figure 3 This is a schematic diagram of the adaptive adjustment spray mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the connection structure between the spiral spray pipe and the connecting frame of the present invention; Figure 6 This is a first-view cross-sectional structural schematic diagram of the self-cleaning nozzle mechanism of the present invention; Figure 7 This is a second-view structural schematic diagram of the self-cleaning nozzle mechanism of the present invention.

[0017] Figure label: 11. Tank body; 12. Sensor-operated cover; 13. Separation plate; Adaptive adjustment spray mechanism; 21. Liquid inlet pipe; 22. Spiral spray pipe; 23. Separation baffle; 24. Spray hole; 25. Connecting frame; 26. Electrically controlled telescopic rod; 3. Self-cleaning nozzle mechanism; 31. Mounting base; 32. Connecting base; 33. First spray nozzle; 34. Adjusting plate; 35. Second spray nozzle; 36. Connecting column; 361. Guide groove; 37. Movable plate; 371. Guide ball; 38. Movable base; 39. Spring plate; 310. First connecting pipe; 311. Branch pipe; 312. Adjusting cavity. Detailed Implementation

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

[0019] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0023] The following is combined Figures 1 to 7 As shown, an embodiment of the present invention provides a high-temperature desulfurization and dust removal device, comprising: Tank 1 serves as the main body of the reaction space, with an air inlet located on the lower part of its side wall. An inductive cover 11 is installed at the air inlet to detect the gas flow rate and velocity entering the tower in real time and output an electrical signal to the control system. When the gas intake increases, the system automatically starts a high-load operation mode. To ensure that the inductive cover 11 can be flipped when affected by the gas, a lightweight material is used for the cover.

[0024] The tank 1 is equipped with a separation plate 12, which is used to guide the flow direction of the gas-liquid mixture and achieve preliminary droplet capture, preventing untreated gas from rising and escaping directly.

[0025] An adaptive spray mechanism 2 is located in the upper part of the tank 1 and is used to dynamically adjust the spray intensity and coverage area according to the air intake status. The adaptive spray mechanism 2 includes a spiral spray pipe 22, a separation baffle 23, spray holes 24, and an electrically controlled telescopic rod 26. The spiral spray pipe 22 is fixed inside the tank 1 by a mounting bracket (here, the mounting bracket refers to the horizontal plate above the spiral spray pipe 22 in Figure 5, which is connected to the tank 1 through the plate). One end of the spiral spray pipe 22 is connected to the liquid inlet pipe 21. The spray holes 24 are evenly distributed on one side of the spiral spray pipe 22 and spray directionally towards the center area of ​​the tower to improve the liquid-gas contact efficiency in the core reaction zone.

[0026] The separation baffle 23 is disposed inside the spiral spray pipe 22 and extends axially, dividing the space inside the pipe into two independent chambers, which are respectively connected to liquid supply branches of different pressure levels or agent types to achieve differentiated spray control. When different pressures or different agents need to be supplied, the liquid inlet pipe 21 can be a dual-channel pipe, the end of which is connected to two different devices, and the beginning of the liquid inlet pipe 21 is also respectively connected to the liquid inlet of the spiral spray pipe 22.

[0027] The spiral spray pipe 22 is made of a plastic deformable material and has a certain elastic deformation capability; its cross-section has a structure that is smaller at the top and larger at the bottom, and the middle is connected by an arc-shaped transition; the spray holes 24 are opened on the inner wall of the spiral spray pipe 22, and this area is covered with an elastic material; the spiral spray pipes 22 between adjacent layers partially overlap, and can be squeezed against each other under the action of external force, thereby achieving physical sealing of the spray holes 24.

[0028] During operation, by controlling the overall deformation of the spiral spray pipe 22, relative displacement occurs between its coils, resulting in superimposed pressure, thereby changing the number of spray holes 24 that are open and the effective flow area; under low load conditions, some nozzles are closed to save energy, and under high load conditions, they are fully expanded to enhance the spray density.

[0029] The electrically controlled telescopic rod 26 is connected to the connecting frame 25, and the fixed end of the electrically controlled telescopic rod 26 is connected to the fixed top end of the spiral spray pipe 22 to receive signal input from the inductive cover plate 11. When an increase in air intake is detected, the electrically controlled telescopic rod 26 drives the connecting frame 25 to adjust the spatial posture of the spiral spray pipe 22, causing it to tilt at a different angle toward the central axis. This increases the liquid supply ratio (increases pressure) in the central side chamber, concentrating the spraying focus on the high-density airflow core area and significantly improving desulfurization efficiency.

[0030] The self-cleaning nozzle mechanism 3 is equidistantly distributed on the spiral spray pipe 22 to realize the functions of local blockage identification and automatic cleaning. The self-cleaning nozzle mechanism 3 includes a first spray port 33, an adjusting plate 34, a second spray port 35, and a connecting column 36. The first spray port 33 and the second spray port 35 are used together to form the main spray port. The adjusting plate 34 rotates in linkage with the connecting column 36 to dynamically adjust the opening and closing state between the first spray port 33 and the second spray port 35, so as to realize alternating spraying, pulse rinsing and atomization optimization.

[0031] Specifically, the self-cleaning nozzle mechanism 3 further includes a mounting base 31 and a connecting base 32; the mounting base 31 and the connecting base 32 are connected to form a sealed cavity; two vertical guide blocks are provided on the inner side of the mounting base 31 for limiting and guiding subsequent moving parts; a plurality of first spray nozzles 33 are evenly arranged at the bottom of the connecting base 32; a connecting column 36 is provided inside the mounting base 31, and an adjusting plate 34 is connected to the bottom of the connecting column 36, and a plurality of second spray nozzles 35 are opened on the adjusting plate 34; the second spray nozzles 35 are arranged in a one-to-one correspondence with the first spray nozzles 33, and the two are combined to form a controllable diameter spray port; the connecting column 36 and the mounting base 31 are rotatably connected and can rotate freely within a certain angle range.

[0032] The connecting column 36 has a guide groove 361 on its surface, and a movable plate 37 is fitted over it. The movable plate 37 is limited by a guide block and can only slide along the axial direction of the connecting column 36. A guide ball 371 is embedded inside the movable plate 37, and the guide ball 371 slides in cooperation with the guide groove 361. When the movable plate 37 moves up and down, the guide ball 371 moves along the trajectory of the guide groove 361, forcibly driving the connecting column 36 to rotate, thereby realizing the angle adjustment of the adjusting plate 34.

[0033] Furthermore, the tilt angle of the guide groove 361 is greater than 70°, approaching the vertical direction; this design allows the movable plate 38 to drive the connecting column 36 to complete a certain angle of rotation within a small stroke; at the same time, the pitch is appropriately increased, which facilitates the fine adjustment control of the spray nozzle diameter and is suitable for precise response in scenarios where fine particulate matter adheres.

[0034] A connecting spring is provided between the movable plate 37 and the top of the mounting base 31 to provide a reset force. The branch pipe 311 is located above the movable plate 37, and an adjustment chamber 312 is provided at its connection with the mounting base 31. The adjustment chamber 312 contains a movable seat 38 and a spring plate 39. When the system needs to perform high-pressure spraying, the movable seat 38 is pressed downward, pushing the movable plate 37 downward and reducing its opening. During use, the internal space of the adjustment chamber 312 is divided by the spring plate 39, i.e., the outer wall of the spring plate 39 is in contact with the inner wall of the adjustment chamber 312, and the spring plate 39 moves up and down within the adjustment chamber 312. When pressing is not required, the valve of the branch pipe 311 is switched, and the spring plate 39 is reset under the spring force, pushing out the internal medium. The branch pipe 311 is provided with a one-way drain port. When the branch pipe 311 is connected, the drain port is closed; when the branch pipe 311 is closed, the drain port is open to discharge the medium.

[0035] The chamber of the connecting seat 32 is connected to the spiral spray pipe 22 through the first connecting pipe 310; the first connecting pipe 310 is provided with a branch pipe 311; both the first connecting pipe 310 and the branch pipe 311 are provided with control valves for adjusting the switching between the main spray and the self-cleaning mode.

[0036] During operation, when the system is running normally but slight scaling or adhesion occurs inside the nozzle, the pressure inside the nozzle gradually increases due to the reduced outlet flow area, while the liquid inlet remains unchanged. This pressure acts on the lower part of the movable plate 37, pushing it to move upward. During the upward movement of the movable plate 37, the connecting column 36 rotates through the cooperation of the guide ball 371 and the guide groove 361, causing the adjusting plate 34 to rotate synchronously, gradually expanding the overlapping area between the first spray port 33 and the second spray port 35, that is, automatically increasing the total diameter of the spray port.

[0037] Working principle: During use, gas enters the desulfurization tower through the air inlet at the bottom of the side wall of tank 1; when the airflow impacts the induction cover 11, it pushes it to flip over; since the dynamic pressure intensity corresponding to different air intake is different, the opening angle of the induction cover 11 changes accordingly - the larger the air intake, the larger the flip angle; this angle change is detected in real time by the built-in sensor and converted into an electrical signal to be sent to the control system.

[0038] After receiving the signal, the control system adjusts the working state of the adaptive spray mechanism 2 and the self-cleaning nozzle mechanism 3 according to the preset program. Specifically: The electrically controlled telescopic rod 26 receives a control command, and its movable end begins to extend. The greater the air intake, the longer the extension distance of the electrically controlled telescopic rod 26. Since the spiral spray pipe 22 is connected to the electrically controlled telescopic rod 26 through the connecting frame 25, as the electrically controlled telescopic rod 26 gradually extends, the spiral spray pipes 22, which were originally overlapping due to gravity or initial deformation, are gradually pulled apart, exposing the spray holes 24 that were originally squeezed and closed. At the same time, the control system adjusts the valve distribution ratio of the liquid supply system to increase the liquid supply to the central chamber. This chamber is isolated from the edge side by the separation baffle 23, ensuring that high-flow liquid is concentrated and sprayed towards the central area of ​​the tower. Since the spray nozzle of the spiral spray pipe 22 is located in a deformable and compressible position, when the spiral spray pipe 22 is reset, it will squeeze against each other, which can prevent blockage.

[0039] The above process achieves two major functions: automatically adjusting the number of effective nozzles and spray intensity according to the air intake load to improve resource utilization efficiency; the step-by-step release process of the spray holes 24 itself has a slight disturbance effect, which can produce a flushing effect on nearby deposits, help prevent local blockage, and indirectly support the stable operation of the subsequent self-cleaning nozzle mechanism 3.

[0040] Secondly, during normal operation, the main atomizing spraying task is undertaken by multiple self-cleaning nozzle mechanisms 3 distributed on the spiral spray pipe 22; since the sprayed solution is an alkaline absorbent liquid (such as limestone slurry), it is easy for chemical precipitation or physical adsorption to occur in the nozzle outlet area, resulting in scale or deposits forming between the first spray port 33 and the second spray port 35, causing a reduction in the flow area.

[0041] When the system continues to run but a slight blockage occurs inside the nozzle, the obstruction at the outlet will cause the pressure inside the nozzle cavity to increase, while the total liquid inlet remains unchanged. This pressure acts on the cavity below the movable plate 37, pushing the movable plate 37 to move upward in the vertical direction. The movable plate 37 is provided with a guide ball 371, which is embedded in the guide groove 361 on the surface of the connecting column 36. As the movable plate 37 moves upward, the guide ball 371 slides along the guide groove 361, forcibly driving the connecting column 36 to rotate. The bottom of the connecting column 36 is connected to an adjusting plate 34, which rotates synchronously, thereby changing the relative position between the second spray port 35 on the adjusting plate 34 and the first spray port 33 at the bottom of the connecting seat 32.

[0042] As the overlapping area of ​​the two increases, the diameter of the total spray nozzle automatically expands. This change has a dual effect: ① During the phased expansion of the nozzle diameter, a mechanical pulling force is generated on the already formed attachment area, causing it to loosen and fall off; ② After the total area of ​​the spray nozzle increases, the particles that were originally stuck in it become smaller relative to the flow area. Combined with the pressure difference maintained by the system, they can be discharged by the impact of high-pressure liquid, achieving passive self-cleaning.

[0043] Furthermore, under certain operating conditions, in order to further improve the gas-liquid mixing efficiency, it is necessary to atomize the spray liquid into finer particles, i.e., reduce the spray particle size. In this case, it is required to reduce the spray volume per unit time and increase the velocity, thus requiring a reduction in the effective flow area of ​​the total spray nozzle.

[0044] To this end, the control system activates a fine-tuning mode: by adjusting the liquid flow direction in the first connecting pipe 310 and the branch pipe 311 through the control valve, some liquid is diverted from the main channel into the branch pipe 311; the liquid in this branch enters the regulating chamber 312, acts on the top of the movable seat 38, and pushes it to move downward; the movable seat 38 presses the movable plate 37 to move downward synchronously; at this time, the movable plate 37 drives the connecting column 36 to rotate in the opposite direction (opposite to the aforementioned direction), driving the regulating plate 34 to rotate, reducing the overlap between the first spray nozzle 33 and the second spray nozzle 35, and finally achieving the active reduction of the total spray nozzle diameter.

[0045] In summary, this device achieves front-end air intake sensing through the inductive cover plate 11, and through the linkage of the control system with the electrically controlled telescopic rod 26 and the internal hydraulic feedback mechanism of the nozzle, completes the full-chain closed-loop control from macro-spraying strategy to micro-nozzle adjustment.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature desulfurization and dust removal device, characterized in that: include; Tank (1), the tank (1) serves as the main body of the reaction space, and an air inlet is provided on the lower part of its side wall. An induction cover (11) is provided at the air inlet to detect the gas flow rate entering the tower in real time and output an electrical signal to the control system. An adaptive spray mechanism (2) is located in the upper part of the tank (1), including a spiral spray pipe (22) and an electrically controlled telescopic rod (26); the spiral spray pipe (22) has spray holes (24) evenly distributed on one side, which are directed to spray towards the center of the tower; the working end of the electrically controlled telescopic rod (26) is linked to the tail end of the spiral spray pipe (22) to drive the spiral spray pipe (22) to adjust its telescopic shape; when the air intake is detected to increase, the spiral spray pipe (22) is driven to extend, and the liquid supply ratio is increased at the same time, so that the spraying focus is concentrated in the core area of ​​the high-density airflow; The self-cleaning nozzle mechanism (3) is equidistantly distributed on the spiral spray pipe (22). The self-cleaning nozzle mechanism (3) includes a first spray port (33), an adjusting plate (34), a second spray port (35), and a connecting column (36). The first spray port (33) is located at the bottom of the self-cleaning nozzle mechanism (3). The adjusting plate (34) and the connecting column (36) are located inside the self-cleaning nozzle mechanism (3). The second spray port (35) is opened on the adjusting plate (34). The first spray port (33) and the second spray port (35) are used together to form a total spray port. The opening and closing states of the first spray port (33) and the second spray port (35) are dynamically adjusted by the adjusting plate (34) rotating in conjunction with the connecting column (36).

2. The high-temperature desulfurization and dust removal device according to claim 1, characterized in that; The tank (1) is equipped with a separation plate (12) inside, which is used to guide the flow direction of the gas-liquid mixture and achieve preliminary droplet capture.

3. The high-temperature desulfurization and dust removal device according to claim 1, characterized in that; The spiral spray pipe (22) is fixed inside the tank (1) by a mounting bracket, and one end of it is connected to the liquid inlet pipe (21). The separation baffle (23) is set inside the spiral spray pipe (22) and extends along the axial direction to divide the space inside the pipe into two independent chambers, which are respectively connected to the liquid supply branches of different pressure levels or agent types.

4. The high-temperature desulfurization and dust removal device according to claim 3, characterized in that; The spiral spray pipe (22) is made of a plastic deformable material, which enables it to deform. The cross-section of the spiral spray pipe (22) is smaller at the top and larger at the bottom, with an arc transition in the middle. The spray holes (24) are opened on the inner side of the spiral spray pipe (22), and the inner side of the spiral spray pipe (22) is made of an elastic material. Each layer of spiral spray pipe (22) overlaps and squeezes each other to achieve the blocking effect of the spray holes (24).

5. The high-temperature desulfurization and dust removal device according to claim 1, characterized in that; The self-cleaning nozzle mechanism (3) includes a mounting base (31) and a connecting base (32). The mounting base (31) is connected to the connecting base (32), and two vertical guide blocks are provided on the inner side of the mounting base (31) to limit and guide the movement. Several first spray nozzles (33) are provided at the bottom of the connecting base (32). A connecting column (36) is provided inside the mounting base (31). An adjusting plate (34) is provided at the bottom of the connecting column (36). A second spray nozzle (35) is provided on the adjusting plate (34). The spray nozzles (35) cooperate to form a complete spray nozzle, and the adjusting plate (34) is rotatably connected to the mounting base (31). The connecting column (36) is provided with a guide groove (361). The connecting column (36) is covered with a movable plate (37) that is limited by the guide block. The movable plate (37) is provided with a guide ball (371). The guide ball (371) is used in conjunction with the guide groove (361). The movable plate (37) divides the internal cavity formed by the mounting base (31) and the connecting base (32) into upper and lower parts.

6. The high-temperature desulfurization and dust removal device according to claim 5, characterized in that; The guide groove (361) has an inclination angle greater than 70°.

7. A high-temperature desulfurization and dust removal device according to claim 5, characterized in that; A connecting spring is provided between the movable plate (37) and the inner top of the mounting base (31). The branch pipe (311) is located above the movable plate (37). An adjustment cavity (312) is provided at the connection between the branch pipe (311) and the mounting base (31). A movable seat (38) and a spring plate (39) are provided in the adjustment cavity (312). The movable plate (37) can be moved by pressing the movable seat (38).

8. A high-temperature desulfurization and dust removal device according to claim 5, characterized in that; The chamber of the connecting seat (32) is connected to the spiral spray pipe (22) through the first connecting pipe (310), and a branch pipe (311) is provided on the first connecting pipe (310). Control valves are provided on the first connecting pipe (310) and the branch pipe (311).

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