Device and method for purifying flue gas generated in production of cement from carbide slag

Abstract

The invention relates to the technical field of flue gas purification, in particular to a flue gas purification device and purification method for cement produced by carbide slag, the flue gas purification device comprises a dust removal bin, a gas inlet pipe and a gas outlet pipe, the gas inlet pipe and the gas outlet pipe are fixedly connected to the two sides of the dust removal bin respectively, and the flue gas purification device is characterized in that a plurality of annular plates are fixedly connected into the gas inlet pipe. According to the flue gas purification device, the concentration detection assembly is arranged, and the concentration and the distribution condition of oxynitride in flue gas before purification can be detected through an oxynitride probe arranged on the front side of the movable frame, so that the position of a nozzle and the solution spraying amount can be conveniently controlled according to the concentration and the distribution of the oxynitride; and the concentration of the purified oxynitride is detected through the oxynitride probe arranged on the rear side of the movable frame, secondary purification treatment and detection of the purification effect are facilitated, and the purification effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas purification, in particular to a device and a method for purifying flue gas produced by cement production using carbide slag. Background Art

[0002] The SNCR (Selective Non-Catalytic Reduction) system is an important device used to reduce nitrogen oxide (NOx) emissions in industrial processes such as cement production. It mainly reduces NOx emissions by spraying a reducing agent into the high-temperature flue gas area without a catalyst, causing the reducing agent to react chemically with NOx, converting it into nitrogen and water.

[0003] The existing carbide slag cement fume purification device has the following main problems: first, the nozzle position of the urea solution spray is fixed, and it cannot be adjusted according to the distribution of nitrogen oxides in the flue gas, resulting in uneven purification effect; second, the spray system of the purification device lacks intelligent control of the nitrogen oxide concentration at different positions, which makes the purification effect unsatisfactory, cannot effectively improve production efficiency, and increases costs. Based on the above reasons, the present invention proposes a carbide slag cement fume purification device and a purification method. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a fume purification device and a fume purification method for cement production using carbide slag.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A fume purification device for cement production from carbide slag comprises a dust removal bin, with an air inlet pipe and an air outlet pipe fixedly connected on both sides of the dust removal bin respectively, a plurality of annular plates fixedly connected inside the air inlet pipe, two feed pipes symmetrically fixedly connected on the annular plate, the feed pipe passes through the air inlet pipe at one end away from the annular plate and is fixedly connected to the air inlet pipe, an annular shell fixedly connected to the inner wall of the annular plate, a rotating drive assembly is arranged on the annular shell, a plurality of fixed pipes are evenly distributed and fixedly connected inside the annular shell, a plurality of through holes are evenly distributed on the left and right side walls of the fixed pipes, a closing assembly is arranged at the inner cavity of the fixed pipe at the through holes, a plurality of movable frames are movably connected to each of the fixed pipes, injection assemblies are arranged on the left and right side walls of the movable frame, a displacement drive assembly is arranged on the rear side wall of the movable frame, and concentration detection assemblies are arranged on the front and rear sides of the movable frame.

[0006] As a preferred technical solution of the present invention, the rotating drive assembly includes a top shell, and a plurality of top shells are evenly distributed and fixedly connected on the top surface of the intake pipe, the top shell and the inner cavity of the intake pipe are penetrated, a first motor is fixedly connected to the inner cavity of the top shell, a first rotating shaft is fixedly connected to the rotor of the first motor, a first gear is fixedly connected to the side wall of the first rotating shaft, a ring gear is fixedly connected to the rear side wall of the annular shell, and the first gear is meshed with the ring gear.

[0007] As a preferred technical solution of the present invention, the closing component includes a baffle, and the inner cavity of the fixed tube is provided with a baffle at the through hole, and a fixing rod is fixedly connected to the side wall of the baffle, and the end of the fixing rod away from the baffle passes through the inner wall of the through hole and is movably connected to the fixed tube, and a first spring is sleeved on the fixing rod, one end of the first spring is fixedly connected to the baffle, and the other end of the first spring is fixedly connected to the inner wall of the fixed tube.

[0008] As a preferred technical solution of the present invention, the injection assembly includes a transverse tube, the left and right side walls of the movable frame are fixedly connected with the transverse tube, the end of the transverse tube away from the movable frame is fixedly connected with a round shell, the side wall of the round shell is fixedly connected with a pump, the side wall of the round shell is movably connected with a circular plate, a number of nozzles are evenly distributed and fixedly connected on the circular plate, the nozzles are all inclined to one side, and movable tubes are movably connected in the transverse tube, and the end of the movable tube away from the round shell is matched with the through hole.

[0009] As a preferred technical solution of the present invention, the displacement drive assembly includes a side groove, a side groove is opened on the rear side wall of the movable frame, the movable frame is fixedly connected to a protective shell at the side groove, a second motor is fixedly connected to the inner cavity of the protective shell, a second rotating shaft is fixedly connected to the rotor of the second motor, a second gear is fixedly connected to the side wall of the second rotating shaft, a rack is fixedly connected to the rear side wall of the fixed tube, and the second gear is meshing with the rack.

[0010] As a preferred technical solution of the present invention, the concentration detection component includes a mounting rod, and two mounting rods are fixedly connected to the front and rear side walls of the movable frame. The two mounting rods on the same side are fixedly connected to the same mounting plate at one end away from the movable frame, and two nitrogen oxide probes are symmetrically fixedly connected to the mounting plate.

[0011] As a preferred technical solution of the present invention, two slide plates are symmetrically fixedly connected to the rear side wall of the fixed tube, and two vertical grooves are symmetrically opened on the rear inner wall of the movable frame. The slide plates are inserted into the vertical grooves and are movably connected to the vertical grooves.

[0012] As a preferred technical solution of the present invention, the movable tube is evenly distributed with a plurality of circular holes close to the circular shell, and a round rod is movably connected in the circular hole. One end of the round rod extends out of the circular hole and is fixedly connected to the circular shell. A second spring is sleeved on the round rod, and one end of the second spring is fixedly connected to the circular shell, and the other end of the second spring is fixedly connected to the movable tube.

[0013] The purification method of the fume purification device for producing cement from carbide slag comprises the following steps: S1: Connect the air inlet pipe and the air outlet pipe to external equipment respectively, connect the feed pipe to the external urea solution storage equipment, and input the urea solution into the inner cavity of the annular shell through the feed pipe by the external conveying equipment. The urea solution in the inner cavity of the annular shell enters the inner cavity of the fixed tube, and start the nitrogen oxide probe to complete the preparation work before and after use; S2: In the process of producing cement from carbide slag, the generated flue gas is transported to the air intake pipe through the action of external equipment, so that the flue gas is transported from the air intake pipe to the dust removal bin. During the process of flue gas transportation, the nitrogen oxide content in the flue gas is detected in real time through the nitrogen oxide probe, and the detected nitrogen oxide concentration and distribution data are transmitted to the external control system. The external control system automatically generates a purification plan based on the detected data and inputs the purification plan into the system; S3: starting the first motor, the first motor drives the first rotating shaft to rotate, the first rotating shaft drives the first gear to rotate, the first gear meshes with the ring gear to rotate, the ring gear drives the annular shell to rotate, and the annular shell drives the fixed pipe thereon to rotate, thereby adjusting the nozzle position and adjusting the position where the urea solution is sprayed; S4: Start the second motor, the second motor drives the second shaft to rotate, the second shaft drives the second gear to rotate, the second gear meshes with the rack to move, so that the movable frame moves on the outer wall of the fixed tube, and the nozzle is driven to move to a specified height position on the fixed tube through the movable frame. At this time, the movable tube is pushed to move under the action of the second spring, so that the movable tube is inserted into the through hole on the fixed tube, the movable tube pushes the fixed rod to move, and the fixed tube drives the baffle to move, so that the baffle moves to the side away from the through hole, the through hole is connected with the inner cavity of the fixed tube, and the urea solution in the inner cavity of the fixed tube enters into the inner cavity of the transverse tube and the movable tube through the through hole; S5: The power of the pump at different positions is controlled according to the detected nitrogen oxide concentration at different positions of the flue gas. At this time, the urea solution enters the inner cavity of the round shell under the action of the pump, and the urea solution in the inner cavity of the round shell is sprayed into the flue gas through the nozzle. Moreover, because the nozzle is tilted, the circular plate can be rotated under the action of the reverse force, and the nozzle can realize the rotational spraying of the urea solution, thereby improving the purification effect of the flue gas. S6: The purified flue gas continues to be transported to one side of the dust removal bin in the air intake pipe. At this time, the concentration is detected again by the nitrogen oxide probe on the rear side. According to the detection data of the nitrogen oxide probe on the rear side, the above steps S2-S5 are repeated to perform nitrogen oxide purification operation on the flue gas again, thereby effectively improving the purification effect of the flue gas; S7: The flue gas after multiple purifications enters the dust removal chamber and is processed again through the dust removal chamber. The processed flue gas is discharged through the exhaust pipe, completing the purification operation of the cement flue gas produced by carbide slag.

[0014] The embodiment of the present invention provides a fume purification device and a fume purification method for cement production using carbide slag, which have the following beneficial effects: The present invention is provided with a rotation drive component and a displacement drive component. Through the drive of the first motor, the annular shell can be rotated and adjusted, so that the nozzle on the movable frame is adjusted to a suitable position inside the air intake pipe. Through the drive of the second motor, the movable frame is displaced and adjusted on the fixed pipe, so that the distribution adjustment operation of the nozzle inside the air intake pipe is realized, which is convenient for realizing the accurate and thorough purification operation of the smoke and improving the smoke purification effect. The present invention is provided with a concentration detection component. The nitrogen oxide probe is arranged at the front side of the movable frame, which can detect the concentration and distribution of nitrogen oxides in the flue gas before purification, so as to facilitate the control of the position of the nozzle and the solution spraying amount according to the concentration and distribution of nitrogen oxides, thereby improving the purification effect of the flue gas. The nitrogen oxide probe is arranged at the rear side of the movable frame to detect the concentration of nitrogen oxides after purification, which is convenient for re-purification and detection of purification effect, and the purification effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 is a schematic diagram of the front three-dimensional structure of the annular shell of the present invention; Figure 3 It is a schematic diagram of the rear three-dimensional structure of the annular shell of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure on the fixed pipe of the present invention; Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the movable frame of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the displacement drive assembly of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the rotary drive assembly of the present invention.

[0016] In the figure: 1. dust removal bin; 2. air inlet pipe; 3. air outlet pipe; 4. annular plate; 5. feed pipe; 6. annular shell; 7. rotation drive assembly; 8. fixed pipe; 9. through hole; 10. closing assembly; 11. movable frame; 12. injection assembly; 13. displacement drive assembly; 14. concentration detection assembly; 15. top shell; 16. first motor; 17. first rotating shaft; 18. first gear; 19. annular gear; 20. baffle; 21. fixed rod; 22. first spring; 23. cross tube; 24. round shell; 25. pump; 26. round plate; 27. nozzle; 28. movable pipe; 29. ​​protective shell; 30. second motor; 31. second rotating shaft; 32. second gear; 33. rack; 34. mounting rod; 35. mounting plate; 36. nitrogen oxide probe; 37. slide plate; 38. round rod; 39. second spring. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] Example: Figure 1-7 As shown, the cement fume purification device for carbide slag production includes a dust removal bin 1, an air inlet pipe 2 and an air outlet pipe 3 are fixedly connected to the two sides of the dust removal bin 1, a plurality of annular plates 4 are fixedly connected inside the air inlet pipe 2, two feed pipes 5 are symmetrically fixedly connected to the annular plate 4, one end of the feed pipe 5 away from the annular plate 4 passes through the air inlet pipe 2 and is fixedly connected to the air inlet pipe 2, and an annular shell 6 is fixedly connected to the inner wall of the annular plate 4; In the technical solution of this embodiment, it is possible to connect to an external urea solution storage device to facilitate the delivery and filling operation of the urea solution; A rotary drive assembly 7 is provided on the annular shell 6. The rotary drive assembly 7 includes a top shell 15. A plurality of top shells 15 are evenly distributed and fixedly connected on the top surface of the air intake pipe 2. The top shell 15 penetrates the inner cavity of the air intake pipe 2. A first motor 16 is fixedly connected to the inner cavity of the top shell 15. A first rotating shaft 17 is fixedly connected to the rotor of the first motor 16. A first gear 18 is fixedly connected to the side wall of the first rotating shaft 17. A ring gear 19 is fixedly connected to the rear side wall of the annular shell 6. The first gear 18 is meshed with the ring gear 19. In the technical solution of this embodiment, the first motor 16 is started, the first motor 16 drives the first rotating shaft 17 to rotate, the first rotating shaft 17 drives the first gear 18 to rotate, the first gear 18 engages the ring gear 19 to rotate, the ring gear 19 drives the annular shell 6 to rotate, and the annular shell 6 drives the fixed pipe 8 thereon to rotate, thereby adjusting the position of the nozzle 27 and adjusting the position of the urea solution spraying; A plurality of fixed tubes 8 are evenly distributed and fixedly connected in the annular shell 6, and a plurality of through holes 9 are evenly distributed on the left and right side walls of the fixed tube 8. A closing component 10 is provided at the inner cavity of the fixed tube 8 at the through hole 9, and the closing component 10 includes a baffle 20. A baffle 20 is provided at the inner cavity of the fixed tube 8 at the through hole 9, and a fixing rod 21 is fixedly connected to the side wall of the baffle 20. One end of the fixing rod 21 away from the baffle 20 penetrates the inner wall of the through hole 9 and is movably connected to the fixed tube 8. A first spring 22 is sleeved on the fixing rod 21, and one end of the first spring 22 is fixedly connected to the baffle 20, and the other end of the first spring 22 is fixedly connected to the inner wall of the fixed tube 8. In the technical solution of this embodiment, the baffle 20 is driven by the first spring 22 to move toward the through hole 9, and the through hole 9 is closed by the baffle 20 to prevent the urea solution inside the fixed tube 8 from leaking from the through hole 9, thereby reducing the use cost; A plurality of movable frames 11 are movably connected to each fixed tube 8, and a spray assembly 12 is arranged on the left and right side walls of the movable frame 11, and the spray assembly 12 includes a transverse tube 23, and the left and right side walls of the movable frame 11 are fixedly connected to the transverse tube 23, and the end of the transverse tube 23 away from the movable frame 11 is fixedly connected to a round shell 24, and the side wall of the round shell 24 is fixedly connected to a pump 25, and the side wall of the round shell 24 is movably connected to a circular plate 26, and a plurality of nozzles 27 are evenly distributed and fixedly connected to the circular plate 26, and the nozzles 27 are all inclined to one side, and movable tubes 28 are movably connected in the transverse tube 23, and the end of the movable tube 28 away from the round shell 24 is matched with the through hole 9; In the technical solution of this embodiment, the urea solution enters the inner cavity of the round shell 24 under the action of the pump 25, and the urea solution in the inner cavity of the round shell 24 is sprayed into the flue gas through the nozzle 27. In addition, because the nozzle 27 is tilted, the circular plate 26 can be rotated under the action of the reverse force, and the nozzle 27 can realize the rotational spraying of the urea solution, thereby improving the purification effect of the flue gas. Among them, a plurality of circular holes are evenly distributed on one side of the movable tube 28 close to the round shell 24, and a round rod 38 is movably connected in each of the circular holes. One end of the round rod 38 extends out of the circular hole and is fixedly connected to the round shell 24. A second spring 39 is sleeved on the round rod 38, one end of the second spring 39 is fixedly connected to the round shell 24, and the other end of the second spring 39 is fixedly connected to the movable tube 28, so that the movable tube 28 can move in the transverse tube 23, which is convenient for the docking between the movable tube 28 and the through hole 9; A displacement driving assembly 13 is provided on the rear side wall of the movable frame 11. The displacement driving assembly 13 includes a side groove. A side groove is provided on the rear side wall of the movable frame 11. A protective shell 29 is fixedly connected to the movable frame 11 at the side groove. A second motor 30 is fixedly connected to the inner cavity of the protective shell 29. A second rotating shaft 31 is fixedly connected to the rotor of the second motor 30. A second gear 32 is fixedly connected to the side wall of the second rotating shaft 31. A rack 33 is fixedly connected to the rear side wall of the fixed tube 8. The second gear 32 is meshed with the rack 33. In the technical solution of this embodiment, the second motor 30 is started, the second motor 30 drives the second rotating shaft 31 to rotate, the second rotating shaft 31 drives the second gear 32 to rotate, the second gear 32 engages the rack 33 to move, so that the movable frame 11 moves on the outer wall of the fixed tube 8, and the nozzle 27 is driven by the movable frame 11 to move to a specified height position on the fixed tube 8; Among them, two slide plates 37 are symmetrically fixedly connected to the rear side wall of the fixed tube 8, and two vertical grooves are symmetrically opened on the rear inner wall of the movable frame 11. The slide plates 37 are inserted into the vertical grooves and the slide plates 37 are movably connected to the vertical grooves, so that the movable frame 11 can move stably on the fixed tube 8, thereby improving the adjustment accuracy; Concentration detection components 14 are provided on both the front and rear sides of the movable frame 11. The concentration detection components 14 include mounting rods 34. Two mounting rods 34 are fixedly connected to the front and rear side walls of the movable frame 11. The two mounting rods 34 on the same side are fixedly connected to the same mounting plate 35 at one end away from the movable frame 11. Two nitrogen oxide probes 36 are symmetrically fixedly connected to the mounting plate 35. In the technical solution of this embodiment, during the process of flue gas transportation, the nitrogen oxide content in the flue gas is detected in real time through the nitrogen oxide probe 36, and the detected nitrogen oxide concentration and distribution data are transmitted to the external control system. The external control system automatically generates a purification plan based on the detected data, and inputs the purification plan into the system, and realizes accurate purification operation of the flue gas according to the purification plan, with good purification effect.

[0019] The purification method of the fume purification device for producing cement from carbide slag comprises the following steps: S1: Connect the air inlet pipe 2 and the air outlet pipe 3 to external equipment respectively, connect the feed pipe 5 to an external urea solution storage device, and input the urea solution into the inner cavity of the annular shell 6 through the feed pipe 5 by an external conveying device, the urea solution in the inner cavity of the annular shell 6 enters the inner cavity of the fixed tube 8, and start the nitrogen oxide probe 36, completing the preparation work before and after use; S2: In the process of producing cement from carbide slag, the generated flue gas is transported to the air inlet pipe 2 through the action of external equipment, so that the flue gas is transported from the air inlet pipe 2 to the dust removal bin 1. During the process of flue gas transportation, the nitrogen oxide content in the flue gas is detected in real time by the nitrogen oxide probe 36, and the detected nitrogen oxide concentration and distribution data are transmitted to the external control system. The external control system automatically generates a purification plan based on the detected data and inputs the purification plan into the system; S3: starting the first motor 16, the first motor 16 drives the first rotating shaft 17 to rotate, the first rotating shaft 17 drives the first gear 18 to rotate, the first gear 18 engages with the ring gear 19 to rotate, the ring gear 19 drives the annular shell 6 to rotate, the annular shell 6 drives the fixed pipe 8 thereon to rotate, thereby adjusting the position of the nozzle 27 and adjusting the position of the urea solution spraying; S4: Start the second motor 30, the second motor 30 drives the second rotating shaft 31 to rotate, the second rotating shaft 31 drives the second gear 32 to rotate, the second gear 32 meshes with the rack 33 to move, so that the movable frame 11 moves on the outer wall of the fixed tube 8, and the nozzle 27 is driven by the movable frame 11 to move to a specified height position on the fixed tube 8. At this time, under the action of the second spring 39, the movable tube 28 is pushed to move, so that the movable tube 28 is inserted into the through hole 9 on the fixed tube 8, the movable tube 28 pushes the fixed rod 21 to move, and the fixed tube 8 drives the baffle 20 to move, so that the baffle 20 moves to the side away from the through hole 9, the through hole 9 is connected with the inner cavity of the fixed tube 8, and the urea solution in the inner cavity of the fixed tube 8 enters the inner cavity of the transverse tube 23 and the movable tube 28 through the through hole 9; S5: The power of the pump 25 at different positions is controlled according to the detected nitrogen oxide concentration at different positions of the flue gas. At this time, the urea solution enters the inner cavity of the round shell 24 under the action of the pump 25, and the urea solution in the inner cavity of the round shell 24 is sprayed into the flue gas through the nozzle 27. In addition, because the nozzle 27 is tilted, the circular plate 26 can be rotated under the action of the reverse force, and the nozzle 27 can realize the rotational spraying of the urea solution, thereby improving the purification effect of the flue gas. S6: The purified flue gas continues to be transported in the air intake pipe 2 to the dust removal bin 1. At this time, the concentration is detected again by the nitrogen oxide probe 36 at the rear side. According to the detection data of the nitrogen oxide probe 36 at the rear side, the above steps S2-S5 are repeated to perform nitrogen oxide purification operation on the flue gas again, thereby effectively improving the purification effect of the flue gas. S7: The flue gas after multiple purifications enters the dust removal bin 1, and is processed again through the dust removal bin 1. The processed flue gas is discharged through the exhaust pipe 3, completing the purification operation of the cement flue gas produced by carbide slag.

[0020] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fume purification device for cement production from carbide slag, comprising a dust removal bin (1), wherein both sides of the dust removal bin (1) are respectively fixedly connected with an air inlet pipe (2) and an air outlet pipe (3), wherein: A plurality of annular plates (4) are fixedly connected inside the air intake pipe (2), two feed pipes (5) are symmetrically fixedly connected to the annular plate (4), one end of the feed pipe (5) away from the annular plate (4) passes through the air intake pipe (2) and is fixedly connected to the air intake pipe (2), an annular shell (6) is fixedly connected to the inner side wall of the annular plate (4), a rotation drive assembly (7) is provided on the annular shell (6), and a plurality of fixed pipes (8) are evenly distributed and fixedly connected inside the annular shell (6), the fixed pipes (8) are A plurality of through holes (9) are evenly distributed on the left and right side walls of the fixed tube (8); a sealing component (10) is provided in the inner cavity of the fixed tube (8) at the through hole (9); a plurality of movable frames (11) are movably connected to each of the fixed tubes (8); a spray component (12) is provided on the left and right side walls of the movable frame (11); a displacement driving component (13) is provided on the rear side wall of the movable frame (11); and a concentration detection component (14) is provided on the front and rear sides of the movable frame (11).

2. The cement fume purification device for carbide slag production according to claim 1 is characterized in that: The rotary drive assembly (7) comprises a top shell (15), a plurality of top shells (15) are evenly distributed and fixedly connected on the top surface of the air intake pipe (2), the top shell (15) and the inner cavity of the air intake pipe (2) are penetrated, a first motor (16) is fixedly connected to the inner cavity of the top shell (15), a first rotating shaft (17) is fixedly connected to the rotor of the first motor (16), a first gear (18) is fixedly connected to the side wall of the first rotating shaft (17), a ring gear (19) is fixedly connected to the rear side wall of the annular shell (6), and the first gear (18) is meshed with the ring gear (19).

3. The cement fume purification device for carbide slag production according to claim 1 is characterized in that: The sealing component (10) comprises a baffle (20), and the inner cavity of the fixed tube (8) is provided with a baffle (20) at the through hole (9), and a fixing rod (21) is fixedly connected to the side wall of the baffle (20), and one end of the fixing rod (21) away from the baffle (20) penetrates the inner wall of the through hole (9) and is movably connected to the fixed tube (8), and a first spring (22) is sleeved on the fixing rod (21), one end of the first spring (22) is fixedly connected to the baffle (20), and the other end of the first spring (22) is fixedly connected to the inner wall of the fixed tube (8).

4. The device for purifying cement fume from carbide slag production according to claim 1, characterized in that: The injection assembly (12) comprises a transverse tube (23), the left and right side walls of the movable frame (11) are fixedly connected to the transverse tube (23), the end of the transverse tube (23) away from the movable frame (11) is fixedly connected to a round shell (24), the side wall of the round shell (24) is fixedly connected to a pump (25), the side wall of the round shell (24) is movably connected to a round plate (26), a plurality of nozzles (27) are evenly distributed and fixedly connected to the round plate (26), the nozzles (27) are all arranged to be inclined toward one side, and the inside of the transverse tube (23) is movably connected to a movable tube (28), and the end of the movable tube (28) away from the round shell (24) is arranged to match the through hole (9).

5. The device for purifying cement fume from carbide slag production according to claim 1, characterized in that: The displacement drive assembly (13) comprises a side groove, a rear side wall of the movable frame (11) is provided with a side groove, a protective shell (29) is fixedly connected to the movable frame (11) at the side groove, a second motor (30) is fixedly connected to the inner cavity of the protective shell (29), a second rotating shaft (31) is fixedly connected to the rotor of the second motor (30), a second gear (32) is fixedly connected to the side wall of the second rotating shaft (31), a rack (33) is fixedly connected to the rear side wall of the fixed tube (8), and the second gear (32) is meshed with the rack (33).

6. The device for purifying cement fume from carbide slag production according to claim 1, characterized in that: The concentration detection assembly (14) comprises a mounting rod (34), two mounting rods (34) being fixedly connected to the front and rear side walls of the movable frame (11), and two mounting rods (34) on the same side having ends away from the movable frame (11) being fixedly connected to the same mounting plate (35), and two nitrogen oxide probes (36) being symmetrically fixedly connected to the mounting plate (35).

7. The device for purifying cement fume from carbide slag production according to claim 1, characterized in that: Two slide plates (37) are symmetrically fixedly connected to the rear side wall of the fixed tube (8), and two vertical grooves are symmetrically provided on the rear inner wall of the movable frame (11), and the slide plates (37) are inserted into the vertical grooves and are movably connected to the vertical grooves.

8. The device for purifying cement fume from carbide slag production according to claim 4, characterized in that: A plurality of circular holes are evenly distributed on one side of the movable tube (28) close to the circular shell (24), and a round rod (38) is movably connected in each of the circular holes. One end of the round rod (38) extends out of the circular hole and is fixedly connected to the circular shell (24). A second spring (39) is sleeved on the round rod (38), and one end of the second spring (39) is fixedly connected to the circular shell (24), and the other end of the second spring (39) is fixedly connected to the movable tube (28).

9. The purification method of cement fume purifying device using carbide slag in production according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: connecting the air inlet pipe (2) and the air outlet pipe (3) to external equipment respectively, connecting the feed pipe (5) to an external urea solution storage device, and inputting the urea solution into the inner cavity of the annular shell (6) through the feed pipe (5) by means of an external transport device, so that the urea solution in the inner cavity of the annular shell (6) enters the inner cavity of the fixed tube (8), and starting the nitrogen oxide probe (36), completing the preparation work before and after use; S2: In the process of producing cement from carbide slag, the generated flue gas is transported to the air intake pipe (2) through the action of external equipment, so that the flue gas is transported from the air intake pipe (2) to the dust removal bin (1). During the process of flue gas transportation, the nitrogen oxide content in the flue gas is detected in real time by the nitrogen oxide probe (36), and the detected nitrogen oxide concentration and distribution data are transmitted to the external control system. The external control system automatically generates a purification plan based on the detected data, and inputs the purification plan into the system; S3: starting the first motor (16), the first motor (16) drives the first rotating shaft (17) to rotate, the first rotating shaft (17) drives the first gear (18) to rotate, the first gear (18) meshes with the ring gear (19) to rotate, the ring gear (19) drives the annular shell (6) to rotate, the annular shell (6) drives the fixed pipe (8) thereon to rotate, thereby adjusting the position of the nozzle (27) and adjusting the position of the urea solution spraying; S4: starting the second motor (30), the second motor (30) drives the second rotating shaft (31) to rotate, the second rotating shaft (31) drives the second gear (32) to rotate, the second gear (32) meshes with the rack (33) to move, so that the movable frame (11) moves on the outer wall of the fixed tube (8), and the nozzle (27) is driven by the movable frame (11) to move to a specified height position on the fixed tube (8). At this time, under the action of the second spring (39), the movable tube (28) is pushed to move, so that the movable tube (28) is inserted into the through hole (9) on the fixed tube (8), the movable tube (28) pushes the fixed rod (21) to move, and the fixed tube (8) drives the baffle (20) to move, so that the baffle (20) moves to the side away from the through hole (9), the through hole (9) and the inner cavity of the fixed tube (8) are connected, and the urea solution in the inner cavity of the fixed tube (8) enters the inner cavity of the transverse tube (23) and the movable tube (28) through the through hole (9); S5: The power of the pump (25) at different positions is controlled according to the detected nitrogen oxide concentration at different positions of the flue gas. At this time, the urea solution enters the inner cavity of the circular shell (24) under the action of the pump (25). The urea solution in the inner cavity of the circular shell (24) is sprayed into the flue gas through the nozzle (27). Moreover, because the nozzle (27) is tilted, the circular plate (26) can be rotated under the action of the reverse force. The nozzle (27) can realize the rotational spraying of the urea solution, thereby improving the purification effect of the flue gas. S6: the purified flue gas continues to be transported in the air inlet pipe (2) to the dust removal bin (1). At this time, the concentration is detected again by the nitrogen oxide probe (36) at the rear side. According to the detection data of the nitrogen oxide probe (36) at the rear side, the above steps S2-S5 are repeated to perform nitrogen oxide purification operation on the flue gas again, thereby effectively improving the purification effect of the flue gas. S7: The flue gas after multiple purifications enters the dust removal chamber (1), and is processed again through the dust removal chamber (1). The processed flue gas is discharged through the exhaust pipe (3), thus completing the purification operation of the flue gas from cement production using carbide slag.

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