Anti-blocking salt discharging mechanism for desulfurization wastewater evaporation crystallization

Abstract

This invention relates to the field of anti-clogging salt discharge technology, and discloses an anti-clogging salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater, including a device body. The invention drives a gas distribution plate to rotate as a whole through a drive component. With the help of the trajectory constraint of the vortex guide rail, the slider and push plate perform radial extension and retraction movements. This allows for targeted, fully circumferential automated scraping of the weak wind areas at the edges of the gas distribution plate, precisely peeling off and removing salt crystal impurities that are retained or caked on the plate surface. This effectively overcomes the technical difficulties of traditional equipment where salt crystals accumulate and compact at the edges, blocking the annular material drop gaps. Simultaneously, the stroke difference generated by the radial movement of the slider, linked to the push rod, compression spring, and pressure arm structure, causes the displacement nozzle to adaptively retract and deflect inward. This allows the atomized wastewater jet airflow and the main hot air channel inside the equipment to actively avoid the clearing operation area, reducing the dispersion of loose salt crystals by the high-speed airflow, thereby significantly improving the wastewater evaporation and crystallization treatment capacity.

Description

Technical Field

[0001] This invention belongs to the field of anti-clogging and salt discharge technology, specifically, it relates to an anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater. Background Technology

[0002] Desulfurization wastewater from coal-fired power plants is complex in composition, high in salt content, and high in hardness, making it one of the most difficult terminal wastewaters to treat in power plant water treatment systems. Currently, the mainstream approach in the industry is to use waste heat evaporation crystallization devices to achieve zero-discharge treatment of desulfurization wastewater. This utilizes the low-temperature waste heat from the power plant as a fluidization heat source, causing the atomized desulfurization wastewater to evaporate rapidly internally, resulting in salt crystallization. The core configuration of existing evaporation crystallization devices includes a gas distribution plate. Waste heat air is uniformly transported upwards through the gas distribution plate, forming a stable gas-solid fluidized layer inside. Fine salt crystal particles are suspended, tumble, and continuously grow under the action of the fluidizing airflow, achieving continuous evaporation and crystallization of the desulfurization wastewater. In particular, the central area of ​​the gas distribution plate has a uniform and sufficient hot air velocity, making it difficult for the precipitated salt crystals to accumulate and adhere, thus maintaining a clean fluidized state at all times.

[0003] However, during actual operation, it was found that the outer area of ​​the distribution plate lacked high-intensity fluidizing air coverage. Salt crystals precipitated in this area could not be effectively lifted and fluidized by the hot air, and would continuously settle and accumulate at the outer edge of the gas distribution plate. Under normal operating conditions, a small amount of salt crystals settling at the edge of the gas distribution plate could freely fall through the annular gap between the gas distribution plate and the inner wall of the equipment body, eventually falling into the collection chamber at the bottom of the equipment specifically for collecting impurities and crystalline salts. This ensured normal salt crystal discharge, separation, and collection, guaranteeing continuous equipment operation. However, during actual continuous operation, the settled salt crystals continuously accumulated, agglomerated, and hardened. The volume of the accumulated salt clumps continued to expand outwards, gradually filling and sealing the aforementioned annular gap. After the salt clumps continued to grow and harden, they completely blocked the normal falling channel of the salt crystals, leading to a significant decrease in the evaporation and crystallization efficiency of the desulfurization wastewater. Furthermore, large-scale bridging and accumulation of salt crystals caused blockage of the bottom salt discharge channel, preventing the equipment from continuously and stably discharging salt.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A desulfurization wastewater waste heat evaporation crystallization anti-clogging and salt discharge mechanism includes a device body, a gas distribution plate installed inside the device body, a fixed nozzle installed at the center of the gas distribution plate, a shifting nozzle rotatably installed on the gas distribution plate and placed outside the fixed nozzle, and a drive assembly installed inside the device body for driving the gas distribution plate to rotate. A positioning plate is installed at the rotation center of the gas distribution plate, and a vortex guide rail is provided on the positioning plate. A slider is slidably arranged on the vortex guide rail, and a slide frame is installed on the slider. A push plate is installed at the end of the slide frame and is positioned at the edge of the gas distribution plate. The rotation of the gas distribution plate drives the push plate to slide from the inside to the outside of the gas distribution plate, pushing impurities off the gas distribution plate. The rotating center of the displacement nozzle is equipped with a pressure arm, and a push rod is vertically slidably mounted on the pressure arm. The end of the push rod is in contact with the side wall of the slider. A compression spring is installed between the push rod and the gas distribution plate. When the slider moves outward, the push rod separates from the slider and drives the displacement nozzle to deflect inward to prevent the airflow from affecting the impurities on the push plate.

[0006] In a preferred embodiment of the present invention, a base is bolted between the outer shell of the device body, and support legs are installed at the four corners of the bottom of the base. A pad is installed at the bottom of the support leg. The pad is in the shape of a boss and has an anti-slip groove at the bottom. Reinforcing ribs are installed between adjacent support legs.

[0007] In a preferred embodiment of the present invention, the gas distribution plate has a notch on its side wall, and a sealing plate is slidably installed on the notch. A sealing gasket is provided between the sealing plate and the notch. An input pipe is connected to the outer side wall of the sealing plate, and the input pipe communicates with the inner cavity of the gas distribution plate. The input pipe movably penetrates the side wall of the device body.

[0008] In a preferred embodiment of the present invention, the drive assembly includes a drive motor, the drive motor housing is mounted on the side wall of the device body, a transmission shaft is mounted on the output end of the drive motor, a drive gear is mounted on the end of the transmission shaft, a driven gear meshes with the side wall of the drive gear, and both the drive gear and the driven gear are bevel gears.

[0009] In a preferred embodiment of the present invention, a fixed shaft is installed at the rotation center of the driven gear, the end of the fixed shaft is connected to the rotation center of the positioning plate, a fixed block is installed at the center of the positioning plate, and the top of the fixed block is connected to the rotation center of the gas distribution plate.

[0010] In a preferred embodiment of the present invention, a protective cover is rotatably mounted on the bottom of the gas distribution plate, a bracket is mounted on the outer wall of the protective cover, the two ends of the bracket are mounted on the inner wall of the equipment body, the protective cover covers the outer wall of the positioning plate, the drive gear and the driven gear, and the protective cover is rotatably connected to the transmission shaft, and the protective cover is movable through the slide.

[0011] In a preferred embodiment of the present invention, a through hole is provided on the gas distribution plate, and the displacement nozzle is placed inside the through hole. The inner diameter of the through hole is larger than the outer diameter of the displacement nozzle. A sealing cover is installed on the outer wall of the displacement nozzle, and the end of the sealing cover is installed on the gas distribution plate. The sealing cover is made of rubber.

[0012] In a preferred embodiment of the present invention, a plurality of positioning seats are installed in the inner cavity of the gas distribution plate, and a positioning shaft is rotatably mounted on the positioning seat. The positioning shaft is connected to the rotation center of the displacement nozzle, and the rotation center of the pressure arm is collinear with the axis of the positioning shaft.

[0013] In a preferred embodiment of the present invention, a strip groove is provided on the pressure arm, a slide rod is slidably installed on the strip groove, an arched frame is installed on the slide rod, and the arched frame is U-shaped. The bottom of the arched frame is connected to the push rod, the push rod is movably connected to the gas distribution plate, and the end of the slider is chamfered to facilitate the push rod's reset later.

[0014] In a preferred embodiment of the present invention, a fixing sleeve is installed on the gas distribution plate, the fixing sleeve is movably connected to the push rod, a baffle is installed on the outer wall of the push rod, the baffle is movably connected to the outer wall of the fixing sleeve, and a compression spring is sleeved on the outer wall of the push rod, one end of the compression spring is engaged with the baffle, and the other end of the compression spring is engaged with the fixing sleeve.

[0015] Compared with the prior art, the present invention has the following advantages: This invention drives the gas distribution plate to rotate as a whole through a drive component. With the help of the trajectory constraint of the vortex guide rail, the slider and push plate perform radial extension and retraction movements. This allows for targeted, fully circumferential automated scraping of the weak wind areas at the edges of the gas distribution plate, precisely peeling off and removing salt crystal impurities that are stuck or caked on the plate surface. This effectively overcomes the technical difficulties of salt crystal accumulation and compaction at the edges and blockage of annular material drop gaps in traditional equipment. At the same time, the stroke difference generated by the radial movement of the slider is used to drive the push rod, compression spring, and pressure arm structure to adaptively retract and deflect the displacement nozzle inward. This allows the atomized wastewater jet airflow and the main hot air channel inside the equipment to actively avoid the blockage area, thereby reducing the dispersion of loose salt crystals to be cleaned by the high-speed airflow and preventing secondary dispersion and accumulation of salt crystals. This significantly improves the wastewater evaporation and crystallization treatment capacity.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A three-dimensional diagram of a desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism; Figure 2A top view of the gas distribution plate of a desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism; Figure 3 This is an anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater. Figure 2 Sectional view; Figure 4 A cross-sectional view of the protective cover of a desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism; Figure 5 A partial anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater. Figure 1 ; Figure 6 A partial anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater. Figure 2 ; Figure 7 Cross-sectional view of the gas distribution plate of a desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism. Figure 1 ; Figure 8 Cross-sectional view of the gas distribution plate of a desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism. Figure 2 ; Figure 9 This is an anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater. Figure 8 Enlarged view of point A in the middle.

[0018] In the diagram: 1. Equipment body; 2. Base; 3. Support leg; 4. Pad; 5. Reinforcing rib; 6. Gas distribution plate; 7. Fixed nozzle; 8. Displacement nozzle; 9. Sealing cover; 10. Sealing plate; 11. Input pipe; 12. Drive motor; 13. Transmission shaft; 14. Drive gear; 15. Driven gear; 16. Fixed shaft; 17. Positioning plate; 18. Fixing block; 19. Protective cover; 20. Bracket; 21. Spiral guide rail; 22. Slider; 23. Carriage; 24. Push plate; 25. Positioning seat; 26. Positioning shaft; 27. Through hole; 28. Pressure arm; 29. ​​Strip groove; 30. Slide rod; 31. Arch frame; 32. Push rod; 33. Chamfer; 34. Fixing sleeve; 35. Baffle; 36. Compression spring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] Example 1:

[0021] like Figures 1 to 9As shown, a desulfurization wastewater waste heat evaporation crystallization anti-clogging and salt discharge mechanism includes a device body 1, a gas distribution plate 6 installed inside the device body 1, a fixed nozzle 7 installed at the center of the gas distribution plate 6, a shift nozzle 8 rotatably installed on the gas distribution plate 6, and the shift nozzle 8 is placed outside the fixed nozzle 7. A drive assembly is installed inside the device body 1, and the drive assembly is used to drive the gas distribution plate 6 to rotate. A positioning plate 17 is installed at the rotation center of the gas distribution plate 6, and a vortex guide rail 21 is provided on the positioning plate 17. A slider 22 is slidably arranged on the vortex guide rail 21. A slide 23 is installed on the slider 22. A push plate 24 is installed at the end of the slide 23. The push plate 24 is positioned at the edge of the gas distribution plate 6. The rotation of the gas distribution plate 6 drives the push plate 24 to slide from the inside to the outside of the gas distribution plate 6, pushing impurities to fall off the gas distribution plate 6. A pressure arm 28 is installed at the rotation center of the displacement nozzle 8. A push rod 32 is vertically slidably installed on the pressure arm 28, and the end of the push rod 32 is in contact with the side wall of the slider 22. A compression spring 36 is installed between the push rod 32 and the gas distribution plate 6. When the slider 22 moves outward, the push rod 32 separates from the slider 22 and drives the displacement nozzle 8 to deflect inward to prevent the airflow from affecting the impurities on the push plate 24.

[0022] like Figures 1 to 9 As shown in the specific embodiment, a base 2 is bolted to the outer shell of the equipment body 1. Support legs 3 are installed at the four corners of the bottom of the base 2. A pad 4 is installed at the bottom of the support legs 3. The pad 4 is in the shape of a boss and has anti-slip grooves on its bottom. Reinforcing ribs 5 are installed between adjacent support legs 3. Through the combined support structure of the base 2, support legs 3, boss pad 4 with anti-slip grooves, and reinforcing ribs 5, the installation stability and structural strength of the equipment body 1 can be greatly improved, effectively buffering the vibration of the equipment during operation, preventing the equipment from shifting or shaking, and ensuring the long-term stable operation of the equipment.

[0023] like Figures 1 to 9 As shown, the gas distribution plate 6 has a notch on its side wall, and a sealing plate 10 is slidably installed on the notch. A sealing gasket is provided between the sealing plate 10 and the notch. An input pipe 11 is connected to the outer side wall of the sealing plate 10, and the input pipe 11 is interconnected with the inner cavity of the gas distribution plate 6. The input pipe 11 is movably connected to the side wall of the equipment body 1. Through the sealing structure of the sealing plate 10 and the sealing gasket, and the design of the through-type input pipe 11, the gas distribution plate 6 can be stably transported to the inner cavity of the gas distribution plate 6 while ensuring its sealing performance during rotation, reducing the leakage of water vapor and salt crystals, and preventing air leakage in the air duct from affecting the fluidization crystallization effect.

[0024] Example 2:

[0025] The difference between the above embodiments and this embodiment is that: Figures 1 to 9As shown, the drive assembly includes a drive motor 12. The housing of the drive motor 12 is mounted on the side wall of the equipment body 1. A transmission shaft 13 is mounted on the output end of the drive motor 12, and a drive gear 14 is mounted on the end of the transmission shaft 13. A driven gear 15 meshes with the side wall of the drive gear 14, and both the drive gear 14 and the driven gear 15 are bevel gears. Through the drive motor 12, the transmission shaft 13, and the meshing transmission design of the bevel gear structure of the drive gear 14 and the driven gear 15, the drive can stably provide power for the rotation and unblocking operation of the gas distribution plate 6. The transmission is precise, the operation is smooth, and slippage and jamming problems are not likely to occur. like Figures 1 to 9 As shown, in a specific embodiment, a fixed shaft 16 is installed at the rotation center of the driven gear 15. The end of the fixed shaft 16 is connected to the rotation center of the positioning plate 17. A fixed block 18 is installed at the center of the positioning plate 17, and the top of the fixed block 18 is connected to the rotation center of the gas distribution plate 6. The fixed shaft 16 and the fixed block 18 achieve a coaxial fixed connection between the driven gear 15, the positioning plate 17, and the gas distribution plate 6, ensuring synchronous transmission of power, ensuring synchronous rotation of the gas distribution plate 6 and the positioning plate 17, ensuring the accuracy of the vortex guide rail 21 driving the slider 22, and ensuring stable and synchronous unblocking action.

[0026] like Figures 1 to 9 As shown, a protective cover 19 is rotatably mounted on the bottom of the gas distribution plate 6. A bracket 20 is mounted on the outer wall of the protective cover 19, and both ends of the bracket 20 are mounted on the inner wall of the equipment body 1. The protective cover 19 covers the outer walls of the positioning plate 17, the drive gear 14, and the driven gear 15, and is rotatably connected to the transmission shaft 13. The protective cover 19 also movably passes through the slide 23. The protective cover 19 provides full-enclosed protection for the core transmission components such as the positioning plate 17, the drive gear 14, and the driven gear 15, isolating them from internal high-temperature water vapor and salt crystal dust corrosion, preventing corrosion and jamming of the transmission structure, and extending the service life of the transmission components.

[0027] Example 3:

[0028] The difference between the above embodiments and this embodiment is that: Figures 1 to 9 As shown, a through hole 27 is provided on the gas distribution plate 6, and the shifting nozzle 8 is placed inside the through hole 27. The inner diameter of the through hole 27 is larger than the outer diameter of the shifting nozzle 8. A sealing cover 9 is installed on the outer wall of the shifting nozzle 8, and the end of the sealing cover 9 is installed on the gas distribution plate 6. The sealing cover 9 is made of rubber. Through the structural design of the through hole 27 of the gas distribution plate 6 and the rubber sealing cover 9, a clearance is reserved for the deflection movement of the shifting nozzle 8, and a flexible seal is provided for the installation gap to prevent wastewater and salt crystal particles from seeping into the bottom transmission structure and avoid structural jamming and failure.

[0029] like Figures 1 to 9As shown in the specific embodiment, several pairs of positioning seats 25 are installed inside the gas distribution plate 6. A positioning shaft 26 is rotatably mounted on the positioning seat 25. The positioning shaft 26 is connected to the rotation center of the shift nozzle 8, and the rotation center of the pressure arm 28 is collinear with the axis of the positioning shaft 26. Through the limiting installation structure of the positioning seat 25 and the positioning shaft 26, the shift nozzle 8 and the pressure arm 28 are ensured to rotate coaxially, ensuring that the nozzle deflection action is accurate and stable, avoiding rotational deviation and jamming, and ensuring precise linkage and matching between the avoidance action and the unblocking action.

[0030] like Figures 1 to 9 As shown, furthermore, a strip groove 29 is provided on the pressure arm 28, and a slide rod 30 is slidably installed on the strip groove 29. An arched frame 31 is installed on the slide rod 30, and the arched frame 31 is U-shaped. The bottom of the arched frame 31 is connected to the push rod 32, and the push rod 32 is movably connected to the gas distribution plate 6. The end of the slider 22 is chamfered 33 to facilitate the subsequent reset of the push rod 32. Through the transmission structure of the strip groove 29, slide rod 30, and U-shaped arched frame 31 of the pressure arm 28, combined with the chamfered slider 22, the push rod 32 can be smoothly extended and retracted and accurately reset, reducing mechanical friction resistance and improving the flexibility and reset accuracy of the overall linkage structure.

[0031] like Figures 1 to 9 As shown, a fixing sleeve 34 is further installed on the gas distribution plate 6, and the fixing sleeve 34 is movably connected to the push rod 32. A baffle 35 is installed on the outer wall of the push rod 32, and the baffle 35 is movably connected to the outer wall of the fixing sleeve 34. A compression spring 36 is sleeved on the outer wall of the push rod 32, with one end of the compression spring 36 engaged with the baffle 35 and the other end engaged with the fixing sleeve 34. Through the structure of the fixing sleeve 34 and the baffle 35 limiting the installation of the compression spring 36, the elastic extension and automatic reset of the push rod 32 can be stably realized, providing stable elastic power for the deflection and reset of the displacement nozzle 8, and ensuring the stable operation of the linkage structure.

[0032] The implementation principle of the anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater of the present invention is as follows: During normal operation of the equipment, low-temperature waste heat hot air from the power plant is continuously introduced from the bottom of the equipment and uniformly transported upward through the gas distribution plate 6, forming a stable gas-solid fluidized layer inside the equipment body 1. The desulfurization wastewater is introduced into the inner cavity of the gas distribution plate 6 through the input pipe 11 and atomized and sprayed out through the fixed nozzle 7 in the center and the shift nozzle 8 on the outside. The atomized wastewater comes into full contact with the high-temperature hot air, and the water evaporates quickly, causing the salt in the wastewater to continuously precipitate and form fine salt crystals. Under the support of the fluidized hot air, the fine salt crystals are suspended and tumbled, and continue to crystallize and grow, realizing continuous evaporation and crystallization operation.

[0033] In the central area of ​​the gas distribution plate 6, the airflow is sufficient and uniform, preventing the salt crystals from accumulating and adhering, thus maintaining a clean fluidized state. Most of the salt crystals precipitated in the outer area can fall freely through the annular gap between the gas distribution plate 6 and the inner wall of the equipment body 1, eventually falling into the collection chamber at the bottom of the equipment for normal salt collection. However, during actual continuous operation, due to factors such as local wind speed fluctuations, uneven salt crystal size, and atomization diffusion deviations, a small portion of salt crystals cannot fall through the gap in time and remains and settles on the outer edge of the gas distribution plate 6. This area has weak fluidization airflow and no effective purging disturbance, making it difficult for the retained salt crystals to be carried away by re-fluidization. As the equipment operates continuously for a long time, these residual salt crystals accumulate, agglomerate, compact, and gradually harden, continuously expanding towards the annular gap, eventually easily blocking the annular material discharge gap, causing problems such as poor material discharge, disordered airflow, and salt discharge blockage.

[0034] When cleaning is required, the operator starts the drive motor 12. The drive motor 12 drives the drive gear 14 to rotate through the transmission shaft 13. The drive gear 14 is driven to rotate synchronously through the meshing transmission of the bevel gear. The driven gear 15 drives the positioning plate 17 and the gas distribution plate 6 to rotate coaxially through the fixed shaft 16. During the rotation of the gas distribution plate 6, the vortex guide rail 21 on the positioning plate 17 moves synchronously. The slider 22 is constrained by the trajectory of the vortex guide rail 21 and slides smoothly along the guide rail from the inside of the gas distribution plate 6 to the outside of the edge. This drives the slide 23 and the push plate 24 at the end to move outward synchronously. The push plate 24 is in contact with the surface of the gas distribution plate 6 and scrapes and pushes the salt crystal impurities that are stuck and hardened in the edge area outward. The salt crystal impurities fall from the annular gap between the gas distribution plate 6 and the equipment body 1 to the bottom collection chamber, completing the salt crystal cleaning and salt discharge operation.

[0035] In the early stage of sliding the slider 22 outward, the side wall of the slider 22 is always in contact with the end of the push rod 32. The push rod 32 is pushed outward by the slider 22. At this time, the pressure arm 28 maintains a horizontal posture, and the displacement nozzle 8 maintains a normal outward spraying working angle to ensure that the desulfurization wastewater atomization evaporation crystallization operation can be carried out simultaneously without stopping production. When the slider 22 separates from the end of the push rod 32, the push rod 32 moves rapidly downward under the rebound action of the compression spring 36. The push rod 32 drives the pressure arm 28 to deflect inward around the positioning shaft 26 through the arch frame 31 and the slide rod 30. The pressure arm 28 simultaneously drives the displacement nozzle 8 to retract and deflect inward, so that the atomized wastewater and hot air flow sprayed from the displacement nozzle 8 will not directly disturb the salt crystal impurities being cleaned on the push plate 24, preventing the air flow from blowing away the loose salt crystals and reducing the risk of salt crystals being blown away.

[0036] After the push plate 24 completes the cleaning of salt crystals in the circumferential edge area, the drive motor 12 rotates in reverse, causing the gas distribution plate 6 to rotate in reverse. The slider 22 slides back to its original position along the vortex guide rail 21 from the outside to the inside. The end of the chamfer 33 of the slider 22 smoothly pushes the push rod 32 downward, and the compression spring 36 is compressed and stored again. The pressure arm 28 and the shift nozzle 8 synchronously reset to their normal working angle, and the equipment returns to the normal desulfurization wastewater waste heat evaporation and crystallization operation state.

[0037] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended 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 described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A desulfurization wastewater waste heat evaporation and crystallization anti-clogging and salt discharge mechanism, comprising a device body (1), characterized in that: The device body (1) is equipped with a gas distribution plate (6), a fixed nozzle (7) is installed at the center of the gas distribution plate (6), and a shift nozzle (8) is rotatably installed on the gas distribution plate (6), with the shift nozzle (8) placed outside the fixed nozzle (7). The device body (1) is equipped with a drive assembly, which is used to drive the gas distribution plate (6) to rotate. The gas distribution plate (6) is equipped with a positioning plate (17) at its rotation center, and a spiral guide rail (21) is provided on the positioning plate (17). A slider (22) is slidably provided on the spiral guide rail (21), and a slide frame (23) is installed on the slider (22). A push plate (24) is installed at the end of the slide frame (23), and the push plate (24) is placed at the edge of the gas distribution plate (6). The rotation of the gas distribution plate (6) drives the push plate (24) to slide from the inside to the outside of the gas distribution plate (6), pushing impurities to fall off the gas distribution plate (6). The displacement nozzle (8) has a pressure arm (28) installed at its rotation center. A push rod (32) is vertically slidably installed on the pressure arm (28), and the end of the push rod (32) is in contact with the side wall of the slider (22). A compression spring (36) is installed between the push rod (32) and the gas distribution plate (6). When the slider (22) moves outward, the push rod (32) separates from the slider (22) and drives the displacement nozzle (8) to deflect inward, preventing the airflow from affecting the impurities on the push plate (24).

2. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation crystallization according to claim 1, characterized in that, A base (2) is bolted between the outer shell of the equipment body (1). Support legs (3) are installed at the four corners of the bottom of the base (2). A pad (4) is installed at the bottom of the support leg (3). The pad (4) is in the shape of a boss. An anti-slip groove is provided at the bottom of the pad (4). A reinforcing rib (5) is installed between adjacent support legs (3).

3. The anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater according to claim 1, characterized in that, The gas distribution plate (6) has a notch on its side wall, and a sealing plate (10) is slidably installed on the notch. A sealing gasket is provided between the sealing plate (10) and the notch. An input pipe (11) is connected to the outer side wall of the sealing plate (10), and the input pipe (11) is connected to the inner cavity of the gas distribution plate (6). The input pipe (11) is movably connected to the side wall of the equipment body (1).

4. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation crystallization according to claim 1, characterized in that, The drive assembly includes a drive motor (12), the housing of which is mounted on the side wall of the device body (1), a drive shaft (13) is mounted on the output end of the drive motor (12), a drive gear (14) is mounted on the end of the drive shaft (13), a driven gear (15) meshes with the side wall of the drive gear (14), and both the drive gear (14) and the driven gear (15) are bevel gears.

5. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation crystallization according to claim 4, characterized in that, The driven gear (15) has a fixed shaft (16) installed at its rotation center. The end of the fixed shaft (16) is connected to the rotation center of the positioning plate (17). A fixed block (18) is installed at the center of the positioning plate (17). The top of the fixed block (18) is connected to the rotation center of the gas distribution plate (6).

6. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation crystallization according to claim 4, characterized in that, The bottom of the gas distribution plate (6) is rotatably mounted with a protective cover (19). A bracket (20) is mounted on the outer wall of the protective cover (19). Both ends of the bracket (20) are mounted on the inner wall of the equipment body (1). The protective cover (19) covers the outer wall of the positioning plate (17), the drive gear (14) and the driven gear (15). The protective cover (19) is rotatably connected to the transmission shaft (13). The protective cover (19) is movable through the slide (23).

7. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation and crystallization according to claim 1, characterized in that, The gas distribution plate (6) has a through hole (27), and the displacement nozzle (8) is placed inside the through hole (27). The inner diameter of the through hole (27) is larger than the outer diameter of the displacement nozzle (8). A sealing cover (9) is installed on the outer wall of the displacement nozzle (8). The end of the sealing cover (9) is installed on the gas distribution plate (6). The sealing cover (9) is made of rubber.

8. The anti-blocking salt discharge mechanism of desulfurization wastewater evaporation and crystallization according to claim 1, characterized in that, The gas distribution plate (6) has several pairs of positioning seats (25) installed in its inner cavity. A positioning shaft (26) is rotatably mounted on the positioning seat (25). The positioning shaft (26) is connected to the rotation center of the displacement nozzle (8). The rotation center of the pressure arm (28) is collinear with the axis of the positioning shaft (26).

9. The anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater according to claim 1, characterized in that, The pressure arm (28) has a strip groove (29) and a slide rod (30) is slidably installed on the strip groove (29). An arched frame (31) is installed on the slide rod (30) and the arched frame (31) is U-shaped. The bottom of the arched frame (31) is connected to the push rod (32). The push rod (32) is movably connected to the gas distribution plate (6). The end of the slider (22) is chamfered (33) to facilitate the later reset of the push rod (32).

10. The anti-clogging and salt discharge mechanism for waste heat evaporation and crystallization of desulfurization wastewater according to claim 1, characterized in that, A fixing sleeve (34) is installed on the gas distribution plate (6). The fixing sleeve (34) is movably connected to the push rod (32). A baffle (35) is installed on the outer wall of the push rod (32). The baffle (35) is movably connected to the outer wall of the fixing sleeve (34). A compression spring (36) is sleeved on the outer wall of the push rod (32). One end of the compression spring (36) is engaged with the baffle (35), and the other end of the compression spring (36) is engaged with the fixing sleeve (34).

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