An oxidation device for desulfurization ash

Abstract

This invention relates to the field of desulfurization ash treatment technology, and discloses an oxidation device for desulfurization ash, including an oxidation tank, a feed channel at the top of the oxidation tank for inputting desulfurization ash, an oxidation component inside the oxidation tank for oxidizing the desulfurization ash, and a discharge pipe at the bottom of the oxidation tank for outputting the desulfurization ash. The oxidation component includes several longitudinal oxidation pipes rotatably installed inside the oxidation tank, several transverse oxidation pipes around the longitudinal oxidation pipes, and an injection pipe at the top of the oxidation tank for inputting oxidant. The injection pipe and the longitudinal oxidation pipes are rotatably connected, and several solvent nozzles are opened around the transverse oxidation pipes. This application has the effect of improving the ease with which CaSO3 in desulfurization ash decomposes and releases SO2.

Description

Technical Field

[0001] This invention relates to the field of desulfurization ash treatment technology, and in particular to an oxidation device for desulfurization ash. Background Technology

[0002] SO2 is one of the most significant pollutants in industries such as energy, metallurgy, and chemicals. Semi-dry or dry desulfurization methods offer advantages such as low water consumption and strong adaptability to flue gas. Lime is typically used as the desulfurizing agent. The generated desulfurization ash mainly consists of CaSO3, CaSO4, and CaO. While this ash can be used in the production of calcium sulfoaluminate cement, cement additives, and building materials, its high CaSO3 content limits its direct use in industries like cement. Some desulfurization ash has to be discarded or stored for extended periods to slowly oxidize the CaSO3, leading to secondary pollution from desulfurization byproducts.

[0003] For example, Chinese utility model patent CN215463456U discloses a mixing device for sludge and desulfurization ash, including a shell. A herringbone pipe is located at the top of the shell, and the bottom two ports of the herringbone pipe are connected to the top ports of two herringbone pipes. A motor is installed on the left side wall of the shell, and the motor's output shaft is connected to an eccentric wheel. A bearing is fitted on the outer wall of the connecting shaft of the eccentric wheel, and a filter plate is fitted on the outer wall of the bearing. The other end of the filter plate is connected to the right side wall of the shell via a spring. This utility model can disperse the desulfurization ash through the herringbone pipes, allowing the ash to fall evenly onto the filter plate. The motor drives the eccentric wheel to rotate, thereby causing the filter plate to screen the desulfurization ash. The ash falls evenly into the mixing drum below and mixes with the sludge.

[0004] Regarding the aforementioned technologies, the uniform mixing of desulfurization ash and sewage sludge can remove pathogenic microorganisms and parasite eggs from the sludge, precipitate metal ions, and ensure that indicators such as worm egg mortality and fecal coliform count meet the pollutant discharge standards of urban sewage treatment plants. However, CaSO3 in desulfurization ash easily decomposes to release SO2, which is one of the most important pollutants in energy, metallurgy, chemical and other industries. Summary of the Invention

[0005] In order to improve the problem that CaSO3 in desulfurization ash easily decomposes and releases SO2, this application provides an oxidation device for desulfurization ash.

[0006] The oxidation device for desulfurization ash provided in this application adopts the following technical solution:

[0007] An oxidation device for desulfurized ash includes an oxidation tank, a feed channel at the top of the oxidation tank for inputting desulfurized ash, an oxidation component inside the oxidation tank for oxidizing desulfurized ash, and a discharge pipe at the bottom of the oxidation tank for outputting desulfurized ash. The oxidation component includes several longitudinal oxidation pipes rotatably installed inside the oxidation tank, several transverse oxidation pipes around the longitudinal oxidation pipes, and an injection pipe at the top of the oxidation tank for inputting oxidant. The injection pipe and the longitudinal oxidation pipes are rotatably connected, and several solvent nozzles are provided around the transverse oxidation pipes.

[0008] By adopting the above technical solution, the oxidant injection equipment injects oxidant into the hollow disc and the longitudinal oxidation pipe through the injection pipe. The oxidant flows through the longitudinal oxidation pipe to several transverse oxidation pipes, and the oxidant is sprayed into the oxidation tank through several solvent nozzles on the periphery of the transverse oxidation pipes, so that the oxidant and the sulfite in the desulfurization ash undergo an oxidation reaction to generate sulfate.

[0009] Optionally, the oxidation tank is equipped with a steam component for raising the temperature. The steam component is rotatably mounted in the oxidation tank with a main shaft guide tube and several branch shaft guide tubes located around the main shaft guide tube. Several steam nozzles are located around the branch shaft guide tubes. The main shaft guide tube is rotatably connected to a steam discharge device.

[0010] By adopting the above technical solution, the high-temperature conditions created by high-temperature water vapor are used to accelerate the oxidation reaction between the oxidant and the sulfite in the desulfurization ash to generate sulfate.

[0011] Optionally, the top of the oxidation tank is provided with a synchronization component for the synchronous rotation of the oxidation longitudinal tube and the main shaft guide tube. The synchronization component includes a gear one fixed to the end of the main shaft guide tube and a gear two fixed to the end of the oxidation longitudinal tube; several gears two mesh with gear one, and several of the branch shaft guide tubes are bent in the same clockwise direction, and the steam nozzle is located on the inner arc surface of the branch shaft guide tube.

[0012] By adopting the above technical solution, several branch shaft guide tubes are bent in the same clockwise direction, so that the main shaft guide tube is rotated by the thrust generated by the high-temperature water vapor. The main shaft guide tube drives the two oxidation longitudinal tubes to rotate through the meshing relationship of gear one and gear two, and the rotation of several oxidation transverse tubes ensures that the oxidant and desulfurization ash are fully mixed.

[0013] Optionally, the oxidation tank is equipped with a spraying component to reduce the floating of desulfurization ash. The spraying component includes a hollow disc on the top surface of the oxidation tank and a plurality of nozzles on the bottom of the hollow disc. The hollow disc is connected to the injection pipe.

[0014] By adopting the above technical solution, the oxidant in the hollow disc is sprayed into the oxidation tank through several nozzles. The atomized oxidant can reduce the floating desulfurization ash particles in the oxidation tank.

[0015] Optionally, the oxidation tank is equipped with a scraping component for scraping off the desulfurization ash adhering to the inner wall of the oxidation tank. The scraping component includes a vapor ring rotatably mounted on the bottom surface of the oxidation tank, several cleaning scrapers vertically arranged around the vapor ring, and an arc-shaped scraper fixedly connected between the vapor ring and the main shaft guide tube. The cleaning scrapers, the arc-shaped scrapers, and the vapor ring are all in contact with the inner wall of the oxidation tank.

[0016] By adopting the above technical solution, the rotating stirring scraper can scrape off the desulfurization ash adhering to the inner circumference of the oxidation tank, thus improving the problem that the adhering desulfurization ash is difficult to clean after it has solidified.

[0017] Optionally, the oxidation tank is provided with a stirring component for mixing desulfurization ash and oxidant. The stirring component includes several stirring guides located around the cleaning scraper. The several stirring guides intersect with several oxidation horizontal pipes. The stirring guides, cleaning scraper, steam ring and arc-shaped scraper are provided with cavities and are connected. The stirring guides are provided with several steam nozzles around their periphery.

[0018] By adopting the above technical solution, the rotating main shaft guide tube drives two cleaning scrapers to rotate through the arc-shaped scraper and the steam ring. The cleaning scrapers drive several stirring guide tubes to rotate. The rotation of several stirring guide tubes and the split shaft guide tubes enables the high-temperature water vapor and desulfurization ash to be fully mixed, so as to achieve the effect of uniform heating of desulfurization ash.

[0019] Optionally, the bottom of the oxidation tank is provided with a baking component for drying desulfurization ash. The baking component includes a grinding tank located at the bottom of the oxidation tank and a heat-conducting sleeve fixed inside the grinding tank. A spiral heating wire is provided between the heat-conducting sleeve and the grinding tank. The oxidation tank is connected to the grinding tank through a discharge pipe.

[0020] By adopting the above technical solution, the heating wire inside the grinding tank is energized and heated, and the grinding tank dries the damp desulfurization ash through the heating wire.

[0021] Optionally, the grinding tank is provided with a grinding component for grinding desulfurization ash. The grinding component includes a filter screen cylinder disposed inside the grinding tank, an eccentric roller rotatably installed inside the filter screen cylinder, and a motor fixed to the top of the grinding tank. The output shaft of the motor is eccentrically arranged and fixedly connected to the eccentric roller.

[0022] By adopting the above technical solution, the motor is powered on and starts to drive the eccentric roller to rotate eccentrically. The eccentric roller continuously crushes and grinds the desulfurization ash in the filter cylinder, so that the clump of desulfurization ash is crushed into powder, and the powdered desulfurization ash is screened out through the mesh of the filter cylinder.

[0023] Optionally, the cross-section of the arc-shaped scraper is arc-shaped, and several arc-shaped scrapers are all bent in the same clockwise direction.

[0024] By adopting the above technical solution, the rotating arc scraper pushes the desulfurization ash to the circumference of the oxidation tank through its outer arc surface. The solenoid valve on the side of the discharge pipe is opened, allowing the oxidized desulfurization ash to fall into the grinding tank through the discharge pipe.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The oxidant is sprayed into the oxidation tank through several solvent nozzles on the periphery of the oxidation pipe, causing the oxidant and the sulfite in the desulfurization ash to undergo an oxidation reaction to generate sulfate;

[0027] 2. The rotating stirring scraper can scrape off the desulfurization ash adhering to the inner circumference of the oxidation tank, improving the problem that the adhering desulfurization ash is difficult to clean after it has hardened;

[0028] 3. The rotation of several stirring guide tubes and split-shaft guide tubes ensures that the high-temperature water vapor and desulfurization ash are fully mixed, so as to achieve the effect of uniform heating of the desulfurization ash. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the oxidation device for desulfurized ash in the embodiments of this application.

[0030] Figure 2 yes Figure 1 A schematic cross-sectional view of the oxidation unit for desulfurization ash along the AA direction.

[0031] Figure 3 This is a schematic diagram of the internal structure of the oxidation tank in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 11. Grinding tank; 12. Heat-conducting sleeve; 13. Heating wire; 14. Filter screen cylinder; 15. Eccentric roller; 16. Motor; 17. Exhaust gas sleeve one; 18. Discharge channel; 19. Oxidation tank; 20. Discharge pipe; 21. Exhaust gas sleeve two; 22. Main shaft guide tube; 23. Split shaft guide tube; 24. Steam nozzle; 25. Steam ring; 26. Arc-shaped scraper; 27. Cleaning scraper; 28. Stirring guide tube; 29. ​​Steam nozzle; 30. Oxidation longitudinal tube; 31. Gear one; 32. Gear two; 33. Oxidation horizontal tube; 34. Hollow disc; 35. Nozzle; 36. Injection pipe; 37. Feed channel; 38. Solvent nozzle. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0034] Reference Figure 1 and Figure 2 The desulfurization ash oxidation device includes a grinding tank 11 supported on the ground by four legs. A heat-conducting sleeve 12 is installed inside the grinding tank 11, and the grinding tank 11 and the heat-conducting sleeve 12 are coaxially arranged. The upper and lower ends of the heat-conducting sleeve 12 are welded to the upper and lower inner walls of the grinding tank 11, respectively. A gap is left between the outer circumference of the heat-conducting sleeve 12 and the inner circumference of the grinding tank 11. A spiral-shaped heating wire 13 is installed in the gap between the heat-conducting sleeve 12 and the grinding tank 11 to achieve the drying treatment of the oxidized desulfurization ash by the grinding tank 11. A filter screen cylinder 14 is installed inside the grinding tank 11. The top of the filter screen cylinder 14 is fixed to the inner top surface of the grinding tank 11. The filter screen cylinder 14 is located inside the heat-conducting sleeve 12 and is a cylindrical structure formed by filter wire mesh.

[0035] Reference Figure 1 and Figure 2 The grinding tank 11 has a tail gas sleeve 17 on its top periphery. One end of the tail gas sleeve 17 passes through the inner circumference of the heat-conducting sleeve 12, and the other end of the tail gas sleeve 17 is connected to the existing tail gas treatment equipment, thereby realizing the purification treatment of tail gas containing sulfur dioxide. The bottom of the grinding tank 11 has a discharge channel 18, which is controlled by a solenoid valve to clear and block the channel. An eccentric roller 15 is installed inside the filter cylinder 14, and the upper and lower ends of the eccentric roller 15 are respectively attached to the upper and lower inner walls of the filter cylinder 14. A motor 16 is fixed on the top of the grinding tank 11. The output shaft of the motor 16 is eccentrically set with the eccentric roller 15, and the output shaft of the motor 16 passes through the top of the grinding tank 11 and is fixedly connected to the eccentric roller 15.

[0036] Reference Figure 2 and Figure 3An oxidation tank 19 is located above the grinding tank 11. A discharge pipe 20 is fixed between the oxidation tank 19 and the grinding tank 11. Two discharge pipes 20 are evenly spaced around the axis of the oxidation tank 19. The oxidation tank 19 is connected to the grinding tank 11 through the discharge pipes 20. The discharge pipes 20 are controlled by a solenoid valve to clear and block the pipes. A tail gas sleeve 21 is installed on the periphery of the top of the oxidation tank 19. One end of the tail gas sleeve 21 passes through the oxidation tank 19, and the other end is connected to the existing tail gas treatment equipment, thereby realizing the purification treatment of tail gas containing sulfur dioxide. A feed channel 37 is installed on the periphery of the top of the oxidation tank 19. One end of the feed channel 37 passes through the oxidation tank 19, and the other end is connected to the existing desulfurization ash conveying equipment. A main shaft guide tube 22 is coaxially arranged inside the oxidation tank 19. The main shaft guide tube 22 is rotatably installed inside the oxidation tank 19. The bottom end of the main shaft guide tube 22 extends out of the bottom of the oxidation tank 19. The bottom end of the main shaft guide tube 22 is connected to the existing steam emission equipment through a rotary joint.

[0037] Reference Figure 2 and Figure 3 A main shaft guide 22 is horizontally fixed with branch shaft guides 23. Several branch shaft guides 23 are arranged along the length of the main shaft guide 22, and two rows of branch shaft guides 23 are evenly spaced around the axis of the main shaft guide 22. The cross-section of each branch shaft guide 23 is arc-shaped, and all branch shaft guides 23 are bent in the same clockwise direction. Steam nozzles 24 are provided on the inner arc surface of each branch shaft guide 23, and several steam nozzles 24 are arranged along the length of each branch shaft guide 23. An oxidizer 19 is axially mounted with a steam ring 25, which is rotatably mounted around its own axis. The outer circumferential surface of the steam ring 25 is in contact with the inner circumferential surface of the oxidizer 19, and the steam ring 25 is in contact with the bottom surface of the oxidizer 19. Two arc-shaped scrapers 26 are horizontally fixed with the main shaft guide 22, and two arc-shaped scrapers 26 are evenly spaced around the axis of the main shaft guide 22. The cross-section of each arc-shaped scraper 26 is arc-shaped, and both arc-shaped scrapers 26 are bent in the same clockwise direction.

[0038] Reference Figure 2 and Figure 3The arc-shaped scraper 26 is attached to the bottom surface of the oxidation tank 19, and the end of the arc-shaped scraper 26 away from the main shaft guide tube 22 is fixed to the inner circumferential surface of the steam ring 25. A cleaning scraper 27 is fixed vertically at the top of the steam ring 25, with two cleaning scrapers 27 arranged circumferentially around the axis of the steam ring 25, and the cleaning scrapers 27 abut against the inner circumferential surface of the oxidation tank 19. A stirring guide tube 28 is horizontally fixed near the circumference of the cleaning scraper 27 close to the main shaft guide tube 22, and steam nozzles 29 are vertically inserted through the circumference of the stirring guide tube 28, with several steam nozzles 29 arranged along the length of the stirring guide tube 28. Both the arc-shaped scraper 26 and the cleaning scraper 27 have cavities inside. The main shaft guide tube 22 is connected to the steam ring 25 through the arc-shaped scraper 26, and the arc-shaped scraper 26 is connected to the stirring guide tube 28 through the cleaning scraper 27. An oxidation longitudinal tube 30 is vertically installed inside the oxidation tank 19. The oxidation longitudinal tube 30 is rotatably installed inside the oxidation tank 19. Two oxidation longitudinal tubes 30 are equally spaced around the axis of the main shaft guide tube 22.

[0039] Reference Figure 2 and Figure 3 The top end of the main shaft guide tube 22 extends out of the oxidation tank 19 and is coaxially fixed with gear 31. The top end of the oxidation longitudinal tube 30 extends out of the oxidation tank 19 and is coaxially fixed with gear 32. Both gears 32 mesh with gear 31. Oxidation transverse tubes 33 are fixed horizontally around the periphery of the oxidation longitudinal tube 30. Several oxidation transverse tubes 33 are arranged along the length of the oxidation longitudinal tube 30, and two rows of oxidation transverse tubes 33 are arranged circumferentially around the axis of the oxidation longitudinal tube 30. Several stirring guide tubes 28 and split-shaft guide tubes 23 are staggered with several oxidation transverse tubes 33. Solvent nozzles 38 penetrate vertically around the periphery of the oxidation transverse tubes 33, and several solvent nozzles 38 are arranged along the length of the oxidation transverse tubes 33.

[0040] Reference Figure 2 and Figure 3 A hollow disc 34 is fixed to the top surface of the oxidation tank 19. Several nozzles 35 are evenly arranged at the bottom of the hollow disc 34. The oxidation longitudinal pipe 30 and the main shaft guide tube 22 both pass through the hollow disc 34. A filling pipe 36 is vertically arranged above the oxidation tank 19. The filling pipe 36 is connected to the hollow disc 34 and the oxidation longitudinal pipe 30 respectively through water pipes. The water pipe between the filling pipe 36 and the oxidation longitudinal pipe 30 is rotatably connected to the oxidation longitudinal pipe 30 through a rotating joint. The hollow disc 34 and the oxidation longitudinal pipe 30 are connected to the existing oxidant filling equipment through the filling pipe 36.

[0041] The implementation principle of the desulfurization ash oxidation device disclosed in this application is as follows: First, the desulfurization ash conveying equipment transports the desulfurization ash into the oxidation tank 19 through the feed channel 37. Then, the steam emission equipment transports high-temperature water vapor into the main shaft guide tube 22. The high-temperature water vapor flows through the main shaft guide tube 22 to several branch shaft guide tubes 23, and is injected into the oxidation tank 19 through several steam nozzles 24 on the inner arc surface of the branch shaft guide tubes 23. At the same time, the high-temperature water vapor flows sequentially through the main shaft guide tube 22, the arc-shaped scraper 26, and the steam ring 25 into the cleaning scraper 27. The high-temperature water vapor flows through the cleaning scraper 27 to several stirring guide tubes 28, and is injected into the oxidation tank 19 through several steam nozzles 29 on the periphery of the stirring guide tubes 28. The several branch shaft guide tubes 23 are bent in the same clockwise direction, so that the several branch shaft guide tubes 23 drive the main shaft guide tube 22 to rotate by the counter-thrust generated by the high-temperature water vapor.

[0042] The rotating main shaft guide tube 22 drives two cleaning scrapers 27 to rotate via the arc-shaped scraper 26 and the steam ring 25. The cleaning scrapers 27 drive several stirring guide tubes 28 to rotate. The rotation of the stirring guide tubes 28 and the split shaft guide tube 23 ensures that the high-temperature steam and desulfurization ash are thoroughly mixed, achieving uniform heating of the desulfurization ash. The rotating stirring scrapers can scrape off the desulfurization ash adhering to the inner circumference of the oxidation tank 19, improving the problem of the hard-to-clean desulfurization ash after it has hardened. The oxidant injection equipment injects oxidant into the hollow disc 34 and the oxidation longitudinal tube 30 through the injection pipe 36. The oxidant flows through the oxidation longitudinal tube 30 to several oxidation horizontal tubes 33, and is sprayed into the oxidation tank 19 through several solvent nozzles 38 on the periphery of the oxidation horizontal tubes 33. The oxidant in the hollow disc 34 is sprayed into the oxidation tank 19 through several nozzles 35. The atomized oxidant can reduce the floating desulfurization ash particles in the oxidation tank 19. The main shaft guide tube 22 drives the two oxidation longitudinal tubes 30 to rotate through the meshing relationship of gear 1 31 and gear 2 32, and the rotation of several oxidation horizontal tubes 33 ensures that the oxidant and desulfurization ash are fully mixed.

[0043] The high-temperature conditions created by the high-temperature steam cause the oxidant and sulfites in the desulfurization ash to undergo an oxidation reaction to form sulfates. A rotating arc-shaped scraper 26 pushes the desulfurization ash to the circumference of the oxidation tank 19 via its outer arc surface. The solenoid valve on the side of the discharge pipe 20 opens, allowing the oxidized desulfurization ash to fall into the grinding tank 11 through the discharge pipe 20. The heating wire 13 inside the grinding tank 11 is energized and heats the ash, drying the damp desulfurization ash. The motor 16 is energized and starts, driving the eccentric roller 15 to rotate eccentrically. The eccentric roller 15 continuously crushes and grinds the desulfurization ash in the filter cylinder 14, pulverizing the agglomerated desulfurization ash into powder, which is then sieved out through the mesh of the filter cylinder 14.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oxidation device for desulfurization ash, characterized in that: The system includes an oxidation tank (19), a feed channel (37) located at the top of the oxidation tank (19) for inputting desulfurized ash, an oxidation component located inside the oxidation tank (19) for oxidizing desulfurized ash, and a discharge pipe (20) located at the bottom of the oxidation tank (19) for outputting desulfurized ash. The oxidation component includes several longitudinal oxidation pipes (30) rotatably installed inside the oxidation tank (19), several transverse oxidation pipes (33) located around the longitudinal oxidation pipes (30), and a filling pipe (36) located at the top of the oxidation tank (19) for inputting oxidant. The filling pipe (36) and the longitudinal oxidation pipes (30) are rotatably connected. Several solvent nozzles (38) are opened around the transverse oxidation pipes (33). A steam component for raising the temperature is provided inside the oxidation tank (19). The steam component is rotatably installed. The oxidation tank (19) contains a main shaft guide tube (22) and several branch shaft guide tubes (23) arranged around the main shaft guide tube (22); several steam nozzles (24) are arranged around the branch shaft guide tubes (23); the main shaft guide tube (22) is rotatably connected to a steam discharge device; the top of the oxidation tank (19) is provided with a synchronization component for the oxidation longitudinal tube (30) and the main shaft guide tube (22) to rotate synchronously; the synchronization component includes a gear one (31) fixed to the end of the main shaft guide tube (22) and a gear two (32) fixed to the end of the oxidation longitudinal tube (30); several gear two (32) mesh with gear one (31); several branch shaft guide tubes (23) are bent in the same clockwise direction; and the steam nozzles (24) are arranged on the inner arc surface of the branch shaft guide tubes (23).

2. The oxidation device for desulfurization ash according to claim 1, characterized in that: The oxidation tank (19) is equipped with a spraying component to reduce the floating of desulfurization ash. The spraying component includes a hollow disc (34) located on the top surface of the oxidation tank (19) and several nozzles (35) located at the bottom of the hollow disc (34). The hollow disc (34) is connected to the injection pipe (36).

3. The oxidation device for desulfurization ash according to claim 1, characterized in that: The oxidation tank (19) is equipped with a scraping component, which is used to scrape off the desulfurization ash adhering to the inner wall of the oxidation tank (19). The scraping component includes a vapor ring (25) rotatably installed on the bottom surface of the oxidation tank (19), a number of cleaning scrapers (27) vertically arranged around the vapor ring (25), and an arc-shaped scraper (26) fixedly connected between the vapor ring (25) and the main shaft guide tube (22). The cleaning scraper (27), the arc-shaped scraper (26) and the vapor ring (25) are all in contact with the inner wall of the oxidation tank (19).

4. The oxidation device for desulfurization ash according to claim 3, characterized in that: The oxidation tank (19) is equipped with a stirring component for mixing desulfurization ash and oxidant. The stirring component includes several stirring guide tubes (28) located around the cleaning scraper (27). The several stirring guide tubes (28) are intersected with several oxidation horizontal tubes (33). The stirring guide tubes (28), cleaning scraper (27), steam ring (25) and arc scraper (26) are provided with cavities and are connected to each other. The stirring guide tubes (28) are provided with several steam nozzles (29) around their periphery.

5. The oxidation device for desulfurization ash according to claim 1, characterized in that: The bottom of the oxidation tank (19) is provided with a baking component for drying desulfurization ash. The baking component includes a grinding tank (11) located at the bottom of the oxidation tank (19) and a heat-conducting sleeve (12) fixed inside the grinding tank (11). A spiral-shaped heating wire (13) is provided between the heat-conducting sleeve (12) and the grinding tank (11). The oxidation tank (19) is connected to the grinding tank (11) through a discharge pipe (20).

6. The oxidation device for desulfurization ash according to claim 5, characterized in that: The grinding tank (11) is equipped with a grinding component for grinding desulfurization ash. The grinding component includes a filter screen cylinder (14) inside the grinding tank (11), an eccentric roller (15) rotatably installed inside the filter screen cylinder (14), and a motor (16) fixed to the top of the grinding tank (11). The output shaft of the motor (16) is eccentrically set and fixedly connected to the eccentric roller (15).

7. The oxidation device for desulfurization ash according to claim 3, characterized in that: The cross-section of the arc-shaped scraper (26) is arc-shaped, and several of the arc-shaped scrapers (26) are bent and arranged in the same clockwise direction.

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