Desulfurization equipment for cement plant

Abstract

The utility model relates to the technical field of cement raw material processing, and discloses cement plant desulfurization equipment which comprises a raw material mill, a feed port fixedly connected to the upper end of the raw material mill, a support fixedly connected to the outer surface of the raw material mill, an impeller feeder fixedly connected to the lower end of the raw material mill, and a grinding motor fixedly connected to the upper surface of the raw material mill. The output end of the grinding motor penetrates through the raw material mill and is fixedly connected with a grinding rod, the lower end of the grinding rod is fixedly connected with a grinding hammer, a grinding groove is formed in the raw material mill, the shape of the grinding groove is matched with that of the grinding hammer, a plurality of atomization heads are installed in the raw material mill, and a plurality of auxiliary spray heads are installed in the atomization heads. And the ground raw materials are uniformly humidified by using an atomizing head and an auxiliary spray head, and the spray head is rotated by a dust falling structure so as to ensure uniform humidification. The kiln tail flue gas humidity and dust concentration are improved, the SOadsorption capacity is enhanced, the sulfur fixation efficiency is improved, and SOemission is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cement raw material processing technology, specifically to a desulfurization equipment for cement plants. Background Technology

[0002] With the implementation of GB4915—2013 "Emission Standard of Air Pollutants for Cement Industry", the SO2 emission concentration in existing cement kilns and waste heat recovery systems is required to be limited to ≤200 mg Nm³ (≤100 mg Nm³ in key areas). 3 Our company currently implements emission standards for key regions. The SO2 emission concentration in the company's kiln tail fluctuates greatly due to the start-up and shutdown of the raw material mill. When the raw material mill is operating normally, SO2 ≤ 20 mg / Nm³. 3 During the shutdown of the raw material mill, SO2 levels in the kiln tail flue gas frequently exceed the standard, with the highest SO2 concentration reaching 600 mg / Nm³. 3 The above factors affect the normal operation of the rotary kiln.

[0003] An energy-saving grinding equipment for raw material grinding in cement production, as mentioned in an existing Chinese patent (authorization announcement number: CN209076748U), includes a casing, grinding wall, motor, rotating shaft, bearing, and grinding hammer. The grinding hammer is double-conical. The grinding wall fits the shape of the grinding hammer and is fixed inside the casing. The grinding hammer is fixed on the rotating shaft, one end of which is fixed to the output end of the motor, and the other end of the rotating shaft is engaged with the bearing. This invention uses a double-conical grinding hammer, which can grind raw materials multiple times. The cost of processing in one go is much higher than that of existing equipment. Therefore, it reduces the number of repeated grinding steps, achieving the goals of saving costs, saving energy, and improving efficiency.

[0004] When the total sulfur content of raw meal exceeds 0.18%, it easily leads to excessive SO2 emissions when the raw meal mill is shut down. Analysis of incoming raw materials and fuels revealed that the high total sulfur content in the raw meal is mainly due to high-sulfur limestone. According to relevant literature, high-sulfur limestone undergoes thermal oxidation and decomposition at around 440℃. This temperature range falls within the C1 and C3 stage cyclone separator range. At this temperature, CaCO3 is not completely decomposed, resulting in a low CaO content in the gas and low sulfur fixation efficiency. Most of the sulfur is oxidized into SO3 or SO2, which is emitted with the flue gas. When the raw meal mill is running, most of the flue gas passes through the vertical mill. Due to water spraying inside the mill, the humidity is high, and the sulfur adsorbs onto the CaCO3 surface and reacts during the grinding process, playing a role in sulfur fixation to some extent. Therefore, the SO2 concentration in the kiln tail online monitoring is not high. When the raw meal mill is shut down, all the flue gas directly enters the kiln tail chimney for emission, ultimately leading to excessive SO2 emissions in the flue gas. Utility Model Content

[0005] The purpose of this application is to provide a desulfurization device for cement plants to solve the problem that when the existing raw material mill is shut down, all the flue gas is directly emitted into the kiln tail chimney, which ultimately leads to excessive SO2 emissions in the flue gas.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A desulfurization device for a cement plant includes a raw meal mill. A feed inlet is fixedly connected to the upper end of the raw meal mill. A support is fixedly connected to the outer surface of the raw meal mill. An impeller feeder is fixedly connected to the lower end of the raw meal mill. A grinding motor is fixedly connected to the upper surface of the raw meal mill. A grinding rod is fixedly connected to the output end of the grinding motor through the raw meal mill. A grinding hammer is fixedly connected to the lower end of the grinding rod. A grinding trough is formed inside the raw meal mill, and the shape of the grinding trough is adapted to the grinding hammer. Several atomizing heads are installed inside the raw meal mill. Several auxiliary nozzles are installed inside each atomizing head. A main nozzle is fixedly connected to the lower end of each atomizing head. A dust suppression structure is provided inside the raw meal mill.

[0008] By adopting the above technical solution, during production, the raw meal mill first pours the raw meal into the mill through the feed inlet. The grinding motor drives the grinding rod to rotate, which in turn drives the grinding hammer to grind the raw meal. Half an hour before the mill is to be shut down, several atomizing heads and auxiliary nozzles installed inside the mill uniformly humidify the ground raw meal. A dust-suppressing structure drives the atomizing heads and auxiliary nozzles to rotate during humidification, making the humidification effect more uniform. This increases the humidity of the kiln tail flue gas during operation, thereby increasing the dust concentration in the flue gas, improving the SO2 adsorption capacity, increasing sulfur fixation efficiency, and reducing the SO2 emission concentration at the kiln tail. After implementing these measures, the SO2 emission concentration at the kiln tail flue gas can be reduced by 400-500 mgNm³. 3 After the raw material mill is shut down, the SO2 emission concentration can be basically controlled at 100 mg / Nm³. 3 Within this timeframe, the problem of excessive SO2 emissions during raw material mill shutdowns will be resolved, and SO2 emissions from kiln tail flue gas will be reduced after the upgrade.

[0009] Furthermore, the dust suppression structure includes a water inlet pipe fixedly connected to the outer surface of the raw material mill, a water pump fixedly connected to one end of the water inlet pipe, a water tank opened inside the raw material mill, the other end of the water inlet pipe fixedly connected to the inside of the water tank, a rotating tube fixedly connected to the upper end of the atomizing head, and the upper end of the rotating tube fixedly connected to the inside of the water tank.

[0010] By adopting the above technical solution, the water pump is started to introduce water from the outside into the water inlet pipe. Through the pressurization of the water pump, the water flows into the water tank through the water inlet pipe, and then flows to the atomizing head through the rotating pipe so that the atomizing head can atomize and spray it into the raw material.

[0011] Furthermore, a gear ring is rotatably connected inside the raw material mill, and a rotating gear is fixedly connected to the outer surface of the rotating tube, with the inner side of the gear ring meshing with the rotating gear.

[0012] By adopting the above technical solution, the inner side of the gear ring meshes with the rotating gear, thereby driving the rotating tube and the atomizing head to rotate inside the raw material mill. As the rotating tube rotates, it drives the atomizing head and the auxiliary nozzle to rotate and spray, thereby making the spraying range wider and improving the dust suppression effect.

[0013] Furthermore, a drive motor is fixedly connected to the outer surface of the raw material mill, and a drive gear is fixedly connected to the output end of the drive motor through the raw material mill. The outer side of the gear ring meshes with the drive gear.

[0014] By adopting the above technical solution, the drive motor is started, and its output end drives the drive gear to rotate. Since the drive gear meshes with the outer side of the gear ring, the gear ring will rotate inside the raw material mill.

[0015] Furthermore, an adjusting arc plate is fixedly connected to the upper end of the auxiliary nozzle, and connecting columns are fixedly connected to both sides of the adjusting arc plate. The connecting columns are rotatably connected to the spray head, and a connecting pipe is fixedly connected to the upper end of the adjusting arc plate. The end of the connecting pipe is fixedly connected to the rotating pipe.

[0016] By adopting the above technical solution, water is also sprayed into the raw material through auxiliary nozzles via connecting pipes, which initially reduces dust in the raw material and increases the humidity of the flue gas at the kiln tail.

[0017] Furthermore, a fixed box is fixedly connected inside the raw material mill, and several abutting arc plates are fixedly connected inside the fixed box. The fixed box is rotatably connected to the rotating tube, and the shape of the adjusting arc plate is adapted to that of the abutting arc plate.

[0018] By adopting the above technical solution, when the rotating pipe rotates, it drives the connecting pipe and the adjusting arc plate to perform circular motion. Since the shape of the adjusting arc plate and the contact arc plate are compatible, the adjusting arc plate will contact the contact arc plate during the circular motion. Since the connecting column is rotatably connected to the spray head, the adjusting arc plate will rotate along the connecting column when it is contacted by the contact arc plate. As the adjusting arc plate rotates, it drives the auxiliary spray head to rotate, changing the angle of its spray water source.

[0019] Furthermore, a torsion spring is sleeved on the outside of the connecting column, and the two ends of the torsion spring are fixedly connected to the adjusting arc plate and the spray head, respectively.

[0020] By adopting the above technical solution, the torsion spring also extends and retracts as the adjusting arc plate rotates. When the circumferential motion of the adjusting arc plate moves away from the abutting arc plate, the torsion spring resets, causing the adjusting arc plate to rotate and reset, allowing the auxiliary nozzle to reset vertically downwards.

[0021] Furthermore, a chimney pipe is fixedly connected inside the raw material mill, and a high-temperature fan is fixedly connected inside the chimney pipe.

[0022] By adopting the above technical solution, the high-temperature fan uses its strong suction to draw the flue gas containing SO2 generated at the kiln tail into the chimney pipe, allowing the dust in the flue gas to adsorb SO2 again.

[0023] In summary, this application includes at least one of the following beneficial effects;

[0024] 1. In this application, half an hour before the raw material mill is shut down, a water pump is started to introduce water into the inlet pipe. After pressurization, the water flows into the water tank and is atomized and sprayed onto the raw material through a rotating pipe to the atomizing head. At the same time, the auxiliary nozzles also spray water to reduce dust and increase the humidity of the kiln tail flue gas. This helps to improve SO2 adsorption capacity and sulfur fixation efficiency, and reduce SO2 emission concentration. If SO2 exceeds the standard after shutdown, the drive motor is started to rotate the gear ring, which drives the atomizing head and auxiliary nozzles to rotate and spray, expanding the spray range and improving the dust reduction effect. The intermittent contact between the arc plate and the contacting arc plate is adjusted to change the spraying angle of the auxiliary nozzles, making the water spray more uniform and avoiding excessively high or low humidity in some areas, further improving dust reduction and sulfur fixation efficiency, and reducing SO2 emission concentration to 100 mg / Nm³. 3 Within this range, the problem of excessive SO2 levels during shutdown can be effectively solved.

[0025] 2. In this application, the high-temperature fan uses its powerful suction to draw the flue gas containing SO2 generated at the kiln tail into the chimney pipe, allowing the dust in the flue gas to adsorb SO2 again. This improves the SO2 adsorption capacity in the flue gas and reduces the SO2 emission concentration at the kiln tail. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a desulfurization equipment for a cement plant according to this application;

[0027] Figure 2 This is an internal schematic diagram of a desulfurization device for a cement plant according to this application;

[0028] Figure 3 This is a partial sectional view of the water tank of a desulfurization equipment in a cement plant according to this application;

[0029] Figure 4 This is a schematic diagram of the interior of the raw material mill of a desulfurization equipment in a cement plant according to this application;

[0030] Figure 5 This is a partial sectional view of the atomizing head of a desulfurization device for a cement plant according to this application;

[0031] Figure 6 This is a partial sectional view of the raw material mill of a cement plant desulfurization equipment according to this application;

[0032] Figure 7 It is in this application Figure 5 Enlarged view of point A in the middle;

[0033] Figure 8 It is in this application Figure 6 Enlarged diagram of point B in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Raw material mill; 2. Support frame; 3. Impeller feeder; 4. Chimney pipe; 5. High-temperature fan; 6. Grinding hammer; 7. Grinding rod; 8. Grinding motor; 9. Feed inlet; 10. Drive motor; 11. Water inlet pipe; 12. Water pump; 13. Water tank; 14. Rotating pipe; 15. Rotating gear; 16. Gear ring; 17. Drive gear; 18. Fixing box; 19. Atomizing head; 20. Contact arc plate; 21. Adjusting arc plate; 22. Connecting pipe; 23. Auxiliary nozzle; 24. Torsion spring; 25. Connecting column; 26. Main nozzle. Detailed Implementation

[0036] The following will refer to the embodiments of this utility model. Figure 1 - Figure 6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] Reference Figure 1 and Figure 2 This utility model provides a technical solution: a desulfurization equipment for a cement plant, including a raw material mill 1, a feed inlet 9 fixedly connected to the upper end of the raw material mill 1, a support 2 fixedly connected to the outer surface of the raw material mill 1, an impeller feeder 3 fixedly connected to the lower end of the raw material mill 1, a grinding motor 8 fixedly connected to the upper surface of the raw material mill 1, a grinding rod 7 fixedly connected to the output end of the grinding motor 8 through the raw material mill 1, a grinding hammer 6 fixedly connected to the lower end of the grinding rod 7, a grinding groove opened inside the raw material mill 1, the shape of the grinding groove being adapted to the grinding hammer 6, a plurality of atomizing heads 19 installed inside the raw material mill 1, a plurality of auxiliary nozzles 23 installed inside the atomizing heads 19, a main nozzle 26 fixedly connected to the lower end of the atomizing heads 19, and a dust suppression structure set inside the raw material mill 1.

[0038] During production, raw materials are first poured into the raw material mill 1 through the feed inlet 9. The grinding motor 8 drives the grinding rod 7 to rotate, which in turn drives the grinding hammer 6 to grind the raw materials. Half an hour before the raw material mill 1 is to be shut down, the ground raw materials are uniformly humidified through several atomizing heads 19 and auxiliary nozzles 23 installed inside the atomizing heads 19. The dust suppression structure drives the atomizing heads 19 and auxiliary nozzles 23 to rotate during the humidification process, making the humidification effect more uniform. This increases the humidity of the kiln tail flue gas during operation, thereby increasing the dust concentration in the flue gas, improving the SO2 adsorption capacity in the flue gas, improving the sulfur fixation efficiency, and reducing the SO2 emission concentration at the kiln tail. After the above measures are implemented, the SO2 emission concentration at the kiln tail flue gas can be reduced by 400~500 mgNm. 3 After the raw material mill 1 is shut down, the SO2 emission concentration can be basically controlled at 100 mg / Nm³. 3 Within this timeframe, the problem of excessive SO2 emissions during shutdown of raw material mill 1 will be resolved, and SO2 emissions from the kiln tail flue gas will be reduced after the upgrade.

[0039] Reference Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The dust suppression structure includes a water inlet pipe 11 fixedly connected to the outer surface of the raw material mill 1. A water pump 12 is fixedly connected to one end of the water inlet pipe 11. A water tank 13 is opened inside the raw material mill 1, and the other end of the water inlet pipe 11 is fixedly connected to the inside of the water tank 13. A rotating tube 14 is fixedly connected to the upper end of the atomizing head 19, and the upper end of the rotating tube 14 is fixedly connected to the inside of the water tank 13. A gear ring 16 is rotatably connected inside the raw material mill 1, and a rotating gear 15 is fixedly connected to the outer surface of the rotating tube 14. The inner side of the gear ring 16 meshes with the rotating gear 15. A drive motor 10 is fixedly connected to the outer surface of the raw material mill 1, and a drive gear 17 is fixedly connected to the output end of the drive motor 10 through the raw material mill 1. The outer side of the gear ring 16 meshes with the drive gear 17. An adjusting arc plate 21 is fixedly connected to the upper end of the auxiliary nozzle 23. Connecting columns 25 are fixedly connected to both sides of the adjusting arc plate 21, and the connecting columns 25 are rotatably connected to the spray head. A connecting pipe 22 is fixedly connected to the upper end of the adjusting arc plate 21, and the end of the connecting pipe 22 is fixedly connected to the rotating pipe 14. A fixed box 18 is fixedly connected inside the raw material mill 1. Several abutting arc plates 20 are fixedly connected inside the fixed box 18, and the fixed box 18 is rotatably connected to the rotating pipe 14. The shapes of the adjusting arc plate 21 and the abutting arc plates 20 are adapted to each other. A torsion spring 24 is sleeved on the outside of the connecting column 25, and both ends of the torsion spring 24 are fixedly connected to the adjusting arc plate 21 and the spray head, respectively.

[0040] Half an hour before the raw material mill 1 is to be shut down, water pump 12 is started to introduce water from the outside into the water inlet pipe 11. Through the pressurization of water pump 12, the water flows into the water tank 13 through the water inlet pipe 11, and then flows through the rotating pipe 14 to the atomizing head 19 for atomization and spraying onto the raw material. Simultaneously, water is also sprayed onto the raw material through the auxiliary nozzle 23 via the connecting pipe 22, thus initially reducing dust in the raw material and increasing the humidity of the kiln tail flue gas. This increases the dust concentration in the flue gas, improves the SO2 adsorption capacity in the flue gas, enhances sulfur fixation efficiency, and reduces the SO2 emission concentration at the kiln tail. However, if the SO2 emission concentration remains high after the raw material mill 1 is shut down... If the dust exceeds the limit, the drive motor 10 is activated, and its output drives the drive gear 17 to rotate. Since the drive gear 17 meshes with the outer side of the gear ring 16, the gear ring 16 will rotate inside the raw material mill 1. At the same time, the inner side of the gear ring 16 meshes with the rotating gear 15, thereby driving the rotating tube 14 and the atomizing head 19 to rotate inside the raw material mill 1. The rotation of the rotating tube 14 drives the atomizing head 19 and the auxiliary nozzle 23 to rotate and spray, thereby making the spraying range wider and improving the dust suppression effect. At the same time, when the rotating tube 14 rotates, it drives the connecting tube 22 and the adjusting arc plate 21 to perform circular motion. Since the adjusting arc plate 21 and the contact arc plate 23 rotate, the connecting tube 22 and the adjusting arc plate 23 rotate. The shapes are compatible, so the adjusting arc plate 21 will contact the contacting arc plate 20 during its circular motion. Since the connecting column 25 is rotatably connected to the spray head, the adjusting arc plate 21 will rotate along the connecting column 25 when it is contacted by the contacting arc plate 20. As the adjusting arc plate 21 rotates, it drives the auxiliary spray head 23 to rotate, changing its spray angle. At the same time, the torsion spring 24 also extends and retracts with the rotation of the adjusting arc plate 21. When the circular motion of the adjusting arc plate 21 moves away from the contacting arc plate 20, the torsion spring 24 resets, driving the adjusting arc plate 21 to rotate and reset, allowing the auxiliary spray head 23 to return to its vertical downward position. Intermittent contact with the surface of the contact arc plate 20 causes the adjusting arc plate 21 to move, thereby intermittently changing the spray angle of the auxiliary nozzle 23. This intermittent change in spray angle makes the water spray more uniform, avoiding localized excessively high or low humidity caused by spraying at a fixed angle. This improves dust suppression and sulfur fixation efficiency, further enhancing the dust suppression and flue gas humidity effects, thereby increasing the dust concentration in the flue gas, improving the SO2 adsorption capacity in the flue gas, improving sulfur fixation efficiency, and reducing the SO2 emission concentration at the kiln tail. After implementing the above measures, the SO2 emission concentration at the kiln tail flue gas can be reduced by 400~500 mgNm. 3 After the raw material mill 1 is shut down, the SO2 emission concentration can be basically controlled at 100 mg / Nm³. 3 Within this timeframe, the problem of excessive SO2 emissions during shutdown of raw material mill 1 will be resolved, and SO2 emissions from the kiln tail flue gas will be reduced after the upgrade.

[0041] Reference Figure 2The raw material mill 1 is internally fixedly connected to a chimney pipe 4, and the chimney pipe 4 is internally fixedly connected to a high-temperature fan 5.

[0042] The high-temperature fan 5 uses its powerful suction to draw the flue gas containing SO2 generated at the kiln tail into the chimney pipe 4, and finally back into the raw material mill 1, so that the dust in the flue gas can adsorb SO2 again. This improves the SO2 adsorption capacity in the flue gas, increases the sulfur fixation efficiency, and reduces the SO2 emission concentration at the kiln tail.

[0043] Working principle: Half an hour before the raw material mill 1 is to be shut down, water pump 12 is started to introduce water from the outside into the water inlet pipe 11. Through the pressurization of water pump 12, the water flows into the water tank 13 through the water inlet pipe 11, and then flows through the rotating pipe 14 to the atomizing head 19, where it is atomized and sprayed onto the raw material. Simultaneously, water is also sprayed onto the raw material through the auxiliary nozzle 23 via the connecting pipe 22. This process initially reduces dust in the raw material, increases the humidity of the kiln tail flue gas, thereby increasing the dust concentration in the flue gas, improving the SO2 adsorption capacity in the flue gas, increasing sulfur fixation efficiency, and reducing the SO2 emission concentration at the kiln tail. If the raw material mill 1 is shut down, SO2 emissions will be lowered. If the concentration still exceeds the standard, the drive motor 10 is started, and its output drives the drive gear 17 to rotate. Since the drive gear 17 meshes with the outer side of the gear ring 16, the gear ring 16 will rotate inside the raw material mill 1. At the same time, the inner side of the gear ring 16 meshes with the rotating gear 15, thereby driving the rotating tube 14 and the atomizing head 19 to rotate inside the raw material mill 1. The rotation of the rotating tube 14 drives the atomizing head 19 and the auxiliary nozzle 23 to rotate and spray, thereby making the spraying range wider and improving the dust suppression effect. At the same time, when the rotating tube 14 rotates, it drives the connecting tube 22 and the adjusting arc plate 21 to perform circular motion. Since the shape of plate 20 is compatible, the adjusting arc plate 21 will contact the contacting arc plate 20 during its circular motion. Because the connecting post 25 is rotatably connected to the spray head, the adjusting arc plate 21 will rotate along the connecting post 25 when it is contacted by the contacting arc plate 20. As the adjusting arc plate 21 rotates, it drives the auxiliary spray head 23 to rotate, changing its spray angle. Simultaneously, the torsion spring 24 also extends and retracts with the rotation of the adjusting arc plate 21. When the circular motion of the adjusting arc plate 21 moves away from the contacting arc plate 20, the torsion spring 24 resets, causing the adjusting arc plate 21 to rotate and reset, allowing the auxiliary spray head 23 to return to its vertical downward position. Intermittent contact with the surface of the contacting arc plate 20 causes the adjusting arc plate 21 to move, thereby intermittently changing the spray angle of the auxiliary nozzle 23. This intermittent change in spray angle makes the water spray more uniform, avoiding localized excessively high or low humidity caused by spraying at a fixed angle. This improves dust suppression and sulfur fixation efficiency, further enhancing the dust suppression and flue gas humidity effects, thereby increasing the dust concentration in the flue gas, improving the SO2 adsorption capacity in the flue gas, improving sulfur fixation efficiency, and reducing the SO2 emission concentration at the kiln tail. After implementing the above measures, the SO2 emission concentration at the kiln tail flue gas can be reduced by 400~500 mgNm. 3 After the raw material mill 1 is shut down, the SO2 emission concentration can be basically controlled at 100 mg / Nm³. 3 Within this timeframe, the problem of excessive SO2 emissions during shutdown of raw material mill 1 will be resolved, and SO2 emissions from the kiln tail flue gas will be reduced after the upgrade.

[0044] The high-temperature fan 5 uses its powerful suction to draw the flue gas containing SO2 generated at the kiln tail into the chimney pipe 4, and finally back into the raw material mill 1, so that the dust in the flue gas can adsorb SO2 again. This improves the SO2 adsorption capacity in the flue gas, increases the sulfur fixation efficiency, and reduces the SO2 emission concentration at the kiln tail.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement plant desulphurization plant comprising a raw meal mill (1), characterized in that: The raw material mill (1) upper end is fixedly connected with a feeding port (9), the raw material mill (1) outer surface is fixedly connected with a support (2), the raw material mill (1) lower end is fixedly connected with an impeller feeder (3), the raw material mill (1) upper surface is fixedly connected with a grinding motor (8), the grinding motor (8) output end is fixedly connected with a grinding rod (7) penetrating the raw material mill (1), the grinding rod (7) lower end is fixedly connected with a grinding hammer (6), the raw material mill (1) is internally provided with a grinding groove, the grinding groove shape is adapted to the grinding hammer (6), the raw material mill (1) is internally provided with a plurality of atomizing heads (19), the atomizing head (19) is internally provided with a plurality of auxiliary nozzles (23), the atomizing head (19) lower end is fixedly connected with a main nozzle (26), the raw material mill (1) is internally provided with a dust falling structure.

2. A desulphurization plant for a cement factory according to claim 1, characterized in that: The dust falling structure includes a water inlet pipe (11) fixedly connected to the outer surface of the raw material mill (1), one end of the water inlet pipe (11) is fixedly connected with a water pump (12), the raw material mill (1) is internally provided with a water tank (13), the other end of the water inlet pipe (11) is fixedly connected with the inside of the water tank (13), the atomizing head (19) upper end is fixedly connected with a rotating pipe (14), the rotating pipe (14) upper end is fixedly connected with the inside of the water tank (13).

3. A cement plant desulphurisation apparatus according to claim 2, characterised in that: The raw material mill (1) is internally rotatably connected with a gear ring (16), the rotating pipe (14) outer surface is fixedly connected with a rotating gear (15), the gear ring (16) inner side is meshed with the rotating gear (15).

4. A cement plant desulphurisation apparatus according to claim 3, characterised in that: The raw material mill (1) outer surface is fixedly connected with a driving motor (10), the driving motor (10) output end is fixedly connected with a driving gear (17) penetrating the raw material mill (1), the gear ring (16) outer side is meshed with the driving gear (17).

5. A desulphurization plant for a cement factory according to claim 2, characterized in that: The auxiliary nozzle (23) upper end is fixedly connected with an adjusting arc plate (21), both sides of the adjusting arc plate (21) are fixedly connected with a connecting column (25), the connecting column (25) is rotatably connected with the spray head, the adjusting arc plate (21) upper end is fixedly connected with a connecting pipe (22), the connecting pipe (22) end is fixedly connected with the rotating pipe (14).

6. A cement plant desulphurisation apparatus according to claim 5, characterised in that: The raw material mill (1) is internally fixedly connected with a fixed box (18), the fixed box (18) is internally fixedly connected with a plurality of abutting arc plates (20), the fixed box (18) is rotatably connected with the rotating pipe (14), the adjusting arc plate (21) shape is adapted to the abutting arc plate (20).

7. A desulphurization plant for a cement factory according to claim 5, characterized in that: The connecting column (25) outer side is sleeved with a torsional spring (24), both ends of the torsional spring (24) are fixedly connected with the adjusting arc plate (21) and the spray head respectively.

8. A desulphurization plant for a cement factory according to claim 1, characterized in that: The raw material mill (1) is internally fixedly connected with a chimney pipe (4), the chimney pipe (4) is internally fixedly connected with a high-temperature fan (5).

Images