Double-chamber lime shaft kiln

Abstract

The invention belongs to the technical field of lime shaft kilns, and particularly discloses a double-hearth type lime shaft kiln which is characterized in that a calcining zone is connected to the lower portion of a preheating zone, a cooling zone is connected to the lower portion of the calcining zone, a discharging barrel is connected to the lower portion of the cooling zone, a discharging frame is connected to the lower portion of the discharging barrel, and a discharging mechanism is arranged in the discharging barrel; an air locking mechanism is arranged in the discharging frame. The discharging mechanism is arranged, four discharging holes of a center plate are matched with a sealing plate, materials fall from the center to the periphery in a dispersed mode, material segregation caused by single-channel discharging is avoided, the air locking mechanism is tightly attached to a conical discharging groove through a sealing plate, and a movable plate and the sealing plate are in linkage sealing, so that the discharging efficiency is improved. The external cold air is effectively prevented from flowing backwards and hot air in the kiln is effectively prevented from leaking, zero-time-difference synchronous actions of blanking hole opening, air locking releasing, blanking hole closing and air locking starting are achieved through linkage control of the blanking mechanism and the air locking mechanism, and the air leakage problem caused by delay of a traditional control system is avoided.

Description

Technical Field

[0001] The invention belongs to the field of lime shaft kilns, and particularly discloses a double-chamber lime shaft kiln. Background Art

[0002] At present, lime, as an important industrial raw material, is widely used in metallurgy, chemical industry, environmental protection and other fields. Its production mainly depends on lime shaft kiln. The double-chamber kiln is a parallel flow regenerative lime shaft kiln, which consists of two kiln chambers connected by the lower channel of the calcining belt. The calcination and heat storage functions of the two kiln chambers are interchangeable and operated alternately.

[0003] The existing double-chamber lime shaft kiln unloading mechanism mostly adopts a single-channel design. The concentrated falling of materials can easily lead to uneven distribution in the kiln, resulting in segregation problems such as center accumulation and excessive flow rate at the edge, which in turn affects the gas-solid contact efficiency and causes quality problems such as high lime burning rate and low activity. At the same time, the unloading and air locking systems are usually controlled independently, and there are problems with signal delays or mechanical response asynchrony, which leads to the backflow of external cold air and leakage of hot air in the kiln during unloading, which not only reduces thermal efficiency but also affects the stability of calcination conditions. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a double-chamber lime shaft kiln to solve the problem that the unloading mechanism of the existing double-chamber lime shaft kiln mostly adopts a single-channel design, and the concentrated falling of materials can easily lead to uneven distribution in the kiln, resulting in segregation problems such as center accumulation and excessive flow rate at the edge, which in turn affects the gas-solid contact efficiency and causes quality problems such as high lime burning rate and low activity; at the same time, the unloading and air locking systems are usually controlled independently, and there are problems of signal delay or mechanical response asynchrony, which leads to backflow of external cold air and leakage of hot air in the kiln during unloading, which not only reduces thermal efficiency but also affects the stability of the calcination conditions.

[0005] In order to achieve the above purpose, the present invention provides a preheating zone, characterized in that a calcining zone is connected to the bottom of the preheating zone, a cooling zone is connected to the bottom of the cooling zone, a blanking barrel is connected to the bottom of the blanking barrel, a blanking frame is connected to the inside of the blanking frame, a blanking trough is provided inside the blanking barrel, a center plate is fixedly installed inside the blanking trough, four blanking holes are evenly provided at the end corners of the center plate, a blanking mechanism is provided inside the blanking barrel, and the blanking mechanism includes four sealing plates, and the four sealing plates are movably installed in the four blanking holes respectively, and the outer side of the blanking barrel is movably mounted. A movable plate is provided, which is used to control the sealing plate. A wind locking mechanism is provided inside the blanking frame. The wind locking mechanism includes a blocking plate, which is slidably installed at the bottom of the blanking frame. A guide bar is provided at the end of the blocking plate. A stabilizing groove is provided at the bottom of the blanking frame. The guide bar is slidably installed in the stabilizing groove. Guide columns are installed at the four end corners of the movable plate. A rectangular block is fixedly provided at the bottom of one of the guide columns near the guide bars. A sliding column is installed on the surface of the rectangular block. A path groove is provided on the surface of the guide bar. The surface of the sliding column is slidably installed in the path groove.

[0006] In the above technical solution, preferably, the preheating zone, the calcining zone, the cooling zone, the discharge barrel and the discharge frame are combined into a chamber, and two chambers are arranged in parallel, one of the chambers is in calcining and discharge, and the other chamber is in preheating and loading, and the two chambers circulate alternately.

[0007] In the above technical solution, preferably, a baffle ring is provided inside the blanking trough and above the center plate, the sealing plate is slidably installed below the baffle ring, an extrusion column is fixedly installed in the middle of the sealing plate, the surface of the extrusion column moves through the blanking barrel, a moving block is fixedly installed at one end of the extrusion column on the outside of the blanking barrel, a slide groove is provided on the upper surface of the blanking barrel and below the moving block, and a slider is provided below the moving block and slidably installed in the slide groove.

[0008] In the above technical solution, preferably, a connecting rod is installed above the moving block via a rotating shaft, and the other end of the connecting rod is connected to the movable plate via a rotating shaft.

[0009] In the above technical solution, preferably, a stepper motor is arranged below the blocking plate, a guide groove is opened in the middle of the blocking plate, a disc is arranged at the output end of the stepper motor, a protruding column is installed on the end face of the top of the disc, and the surface of the protruding column is movably arranged in the guide groove.

[0010] In the above technical solution, preferably, a circular groove is provided inside the discharge frame and on the side of the conical discharge trough, a gear is installed inside the circular groove, a protruding ring is fixedly provided inside the gear, and the protruding ring is movably installed inside the conical discharge trough, four scraping strips are evenly installed on the surface of the protruding ring, the scraping strips are close to the inner wall of the conical discharge trough, and a rack is provided on the surface of the guide strip, and the rack is engaged with the gear.

[0011] In the above technical solution, preferably, the path groove includes a straight groove and an inclined groove, the bottom end of the inclined groove is connected to the inclined groove, and the inclined groove is close to the blanking frame.

[0012] In the above technical solution, preferably, the preheating zone has a height of 7000 mm and a diameter of 5232 mm.

[0013] In the above technical solution, preferably, the calcination zone has a height of 10,000 mm and a diameter of 5,312 mm.

[0014] In the above technical solution, preferably, the cooling belt is conical, the height of the cooling belt is 9700 mm, the diameter at the top is 7462 mm, and the diameter at the bottom is 6600 mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The higher height of the preheating zone provides a longer material residence path, allowing the cold material to fully contact the rising high-temperature flue gas in the kiln in countercurrent, maximizing heat absorption and achieving a more complete preheating effect. The 5232mm diameter design balances the material filling rate and airflow distribution, avoiding excessive material accumulation and high airflow resistance due to a too small diameter, and preventing airflow short-circuiting due to an excessively large diameter, ensuring uniform material preheating and reducing raw or overburning. The height of the calcining zone provides ample calcination space and extends the material residence time, ensuring that calcium carbonate is fully decomposed into calcium oxide, resulting in high product activity. The diameter is slightly larger than the preheating zone, forming a slightly expanded diameter structure, which alleviates the volume expansion of the material caused by decomposition, reduces the risk of calcining zone blockage, and provides more space for gas-solid reaction. The tapered design of the cooling zone, which is wide at the top and narrow at the bottom, is more adaptable to the volume contraction characteristics of the material during cooling, avoiding increased cooling air resistance due to excessive material accumulation at the bottom. By setting up a feeding mechanism, the four feeding holes of the center plate cooperate with the sealing plate to make the material fall from the center to the surrounding areas in a dispersed manner, changing the traditional single-channel feeding mode, avoiding the uneven distribution and segregation problems caused by concentrated material falling, ensuring the uniform filling of materials in the vertical kiln, and improving the calcination consistency. The initial position of the sealing plate fits tightly against the inner wall of the feeding hole, and the shielding ring covers the top of the sealing plate. The double seal prevents material impact and hot gas leakage. When the movable plate drives the moving block to slide through the connecting rod, a precisely controllable annular gap is formed between the sealing plate and the feeding hole, realizing flexible switching between the feeding and sealing states. The air-locking mechanism effectively prevents the backflow of cold air from the outside and the leakage of hot air in the kiln through the close fit of the blocking plate and the conical discharge chute, as well as the linkage sealing between the movable plate and the sealing plate; Through the linkage control of the feeding mechanism and the air lock mechanism, the feeding hole is opened, the air lock is released, and the feeding hole is closed and the air lock is started, which realizes the zero-time-difference synchronous action, avoiding the air leakage problem caused by the delay of the traditional control system. As the blocking plate slides back and forth, the rack drives the gear to drive the scraper bar to rotate, continuously scraping off the adhered material on the inner wall of the conical discharge chute. This design is particularly suitable for processing highly viscous materials and can keep the material discharge unobstructed without manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the chamber structure of the present invention; Figure 2 It is a schematic diagram of the structure of the lower barrel of the present invention; Figure 3 It is a schematic diagram of the blanking frame structure of the present invention; Figure 4 This is a top view of a partial structural cross-sectional view of the blanking mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the blanking frame of the present invention; Figure 6 It is a schematic diagram of the internal structure of the circular groove of the present invention.

[0017] In the figure: 1. Preheating zone; 2. Calcination zone; 3. Cooling zone; 4. Discharge barrel; 5. Discharge frame; 6. Discharge mechanism; 7. Air locking mechanism; 8. Slide; 9. Moving block; 10. Connecting rod; 11. Movable plate; 12. Extrusion column; 13. Center plate; 14. Discharge hole; 15. Closing plate; 16. Shielding ring; 17. Guide column; 18. Rectangular block; 19. Path groove; 20. Straight groove; 21. Inclined groove; 22. Conical discharge chute; 23. Blocking plate; 24. Guide bar; 25. Guide groove; 26. Stepper motor; 27. Disc; 28. Protruding column; 29. Circular groove; 30. Gear; 31. Rack; 32. Protruding ring; 33. Scraper bar. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figures 1-6 The double-chamber lime shaft kiln shown in the figure includes a preheating zone 1, which is characterized in that a calcining zone 2 is connected to the bottom of the preheating zone 1, a cooling zone 3 is connected to the bottom of the calcining zone 2, a discharge barrel 4 is connected to the bottom of the cooling zone 3, a discharge frame 5 is connected to the bottom of the discharge barrel 4, a conical discharge chute 22 is provided inside the discharge barrel 4, a discharge chute is provided through the inside of the discharge barrel 4, a center plate 13 is fixedly installed inside the discharge chute, and four discharge holes 14 are evenly provided at the end corners of the center plate 13. The inside of the barrel 4 is provided with a feeding mechanism 6, which includes four sealing plates 15, which are movably mounted in the four feeding holes 14 respectively. A movable plate 11 is movably provided on the outside of the feeding barrel 4, and the movable plate 11 is used to operate the sealing plate 15. The inside of the feeding frame 5 is provided with a wind locking mechanism 7, which includes a blocking plate 23, which is slidably mounted on the bottom of the feeding frame 5. The end of the blocking plate 23 is provided with a guide strip 24, and the bottom of the feeding frame 5 is provided with a stabilizing groove. The guide bar 24 is slidably installed in the stable groove, and guide columns 17 are installed at the four end corners of the movable plate 11. The guide columns 17, one of the guide columns 17 near the bottom of the guide bar 24 is fixedly provided with a rectangular block 18, and the surface of the rectangular block 18 is installed with a sliding column, and the surface of the guide bar 24 is provided with a path groove 19, and the surface of the sliding column is slidably installed in the path groove 19. By setting the discharge mechanism 6, the four discharge holes 14 of the center plate 13 cooperate with the sealing plate 15 to make the material fall from the center to the surrounding areas, avoiding the material segregation caused by single-channel discharge, and the air locking mechanism 7 is tightly fitted with the sealing plate 23 and the conical discharge chute 22, and the movable plate 11 and the sealing plate 15 are linked and sealed to effectively prevent the backflow of external cold air and the leakage of hot air in the kiln. Through the linkage control of the discharge mechanism 6 and the air locking mechanism 7, the discharge hole 14 is opened, the air lock is released, the discharge hole 14 is closed, and the air lock is started with zero time difference synchronous action, avoiding the air leakage problem caused by delay in the traditional control system.

[0021] The preheating zone 1, the calcining zone 2, the cooling zone 3, the discharge barrel 4 and the discharge frame 5 are combined into a chamber. There are two chambers arranged in parallel. When one chamber is calcining and discharging, the other chamber is preheating and loading. The two chambers circulate alternately. The two chambers are respectively in different stages of calcining and discharging and preheating and loading. Through alternating operation, a continuous production mode of calcining in one chamber and preparing in the other chamber is realized. Compared with the intermittent operation of a single-chamber vertical kiln that needs to wait for calcination, cooling and unloading before loading, it can greatly shorten the production cycle and increase the output per unit time.

[0022] A blocking ring 16 is provided inside the blanking chute and above the center plate 13. The sealing plate 15 is slidably installed below the blocking ring 16. An extrusion column 12 is fixedly installed in the middle of the sealing plate 15. The surface of the extrusion column 12 moves through the blanking barrel 4. A moving block 9 is fixedly installed at one end of the extrusion column 12 outside the blanking barrel 4. A chute 8 is provided on the upper surface of the blanking barrel 4 and below the moving block 9. A slider is provided below the moving block 9 and is slidably installed in the chute 8. The initial position of the sealing plate 15 is close to the center plate 13, and its end face is tightly fitted to the inner wall of the blanking hole 14 to form a sealing surface. At the same time, the sealing plate 15 blocks the blanking hole 14. The ring 16 covers the top of the sealing plate 15 to prevent the material from directly impacting the sealing plate 15 from above. At this time, the discharge hole 14 is completely closed, and the material accumulates in the discharge chute above the center plate 13 and cannot fall. The moving block 9 slides along the slide groove 8 in the direction away from the center plate 13. The moving block 9 drives the sealing plate 15 to move synchronously through the extrusion column 12, so that the sealing plate 15 gradually separates from the inner wall of the discharge hole 14, and an annular gap is formed between the two. The sealing plate 15 will be stored under the shielding ring 16. At this time, the material above the center plate 13 falls into the discharge barrel 4 through the gap under the action of gravity, completing the discharge process.

[0023] A connecting rod 10 is installed above the moving block 9 through a rotating shaft, and the other end of the connecting rod 10 is connected to the movable plate 11 through a rotating shaft. When the movable plate 11 moves downward under the action of external power, a horizontal thrust is generated on the moving block 9 through the rotating shaft connection structure of the connecting rod 10, and the moving block 9 will slide along the slide groove 8 toward the direction of the center plate 13, and the end face of the sealing plate 15 will fit tightly against the inner wall of the blanking hole 14. The moving block 9 drives the extrusion column 12 and the sealing plate 15 to move synchronously, so that the end face of the sealing plate 15 fits tightly against the inner wall of the blanking hole 14, thereby closing the blanking hole. Conversely, when the movable plate 11 moves upward, the connecting rod 10 pulls the moving block 9 away from the center plate 13, and a gap is formed between the sealing plate 15 and the blanking hole 14, thereby opening the blanking hole.

[0024] A stepper motor 26 is provided below the blocking plate 23. A guide groove 25 is provided in the middle of the blocking plate 23. A disc 27 is provided at the output end of the stepper motor 26. A protruding column 28 is installed on the end face of the top of the disc 27. The surface of the protruding column 28 is movably provided in the guide groove 25. After the stepper motor 26 is started, the disc 27 at the output end is driven to rotate. The protruding column 28 on the disc 27 rotates with the disc 27, and its surface slides in the guide groove 25 of the blocking plate 23, converting the circular motion of the disc 27 into a linear reciprocating motion of the blocking plate 23. When the protruding column 28 moves to a position close to the position inside the discharge frame 5, the blocking plate 23 will slide to the bottom of the discharge frame 5, blocking the outlet of the conical discharge chute 22 to lock the wind. When the protruding column 28 rotates to other positions, the blocking plate 23 will move away, and the bottom of the conical discharge chute 22 will open, and the material can fall smoothly. Through the precise rotation angle control of the stepping motor 26, the quantitative and intermittent movement of the blocking plate 23 can be achieved, avoiding the instability of the calcination or cooling process caused by the continuous falling of the material, which is particularly suitable for the matching of the discharge rhythm during the alternating operation of the double-chamber kiln.

[0025] A circular groove 29 is provided inside the blanking frame 5 and on the side of the tapered blanking trough 22. A gear 30 is installed inside the circular groove 29. A protruding ring 32 is fixedly provided inside the gear 30. The protruding ring 32 is movably installed inside the tapered blanking trough 22. Four scraping strips 33 are evenly installed on the surface of the protruding ring 32. The scraping strips 33 are close to the inner wall of the tapered blanking trough 22. A rack 31 is provided on the surface of the guide bar 24. The rack 31 is engaged with the gear 30. When the blocking plate 23 slides back and forth along the guide groove 25 driven by the stepping motor 26, the guide bar 24 on its side moves synchronously, bringing The rack 31 on the moving surface makes linear motion, and the rack 31 meshes with the gear 30, converting the linear motion into the circular motion of the gear 30. The gear 30 drives the internal protruding ring 32 to rotate synchronously. The four scraping strips 33 on the surface of the protruding ring 32 rotate with the gear 30, sliding close to the inner wall of the conical discharge chute 22, continuously scraping off the attached material, and preventing the accumulation of material from clogging the discharge channel. The periodic rotation of the scraping strips 33 is achieved through mechanical transmission, and the adhered material on the inner wall of the conical discharge chute 22 can be removed without human intervention. It is particularly suitable for processing materials that are easy to agglomerate or have strong viscosity, ensuring smooth discharge.

[0026] The path groove 19 includes a straight groove 20 and an inclined groove 21. The bottom end of the inclined groove 21 is connected to the inclined groove 21, and the inclined groove 21 is close to the blanking frame 5. While the blocking plate 23 moves back and forth linearly, the sliding column will slide inside the inclined groove 21 and the straight groove 20. When the sliding column moves from the inclined groove 21 to the straight groove 20, the movable plate 11 will drop. When the sliding column moves from the straight groove 20 to the inclined groove 21, the movable plate 11 will rise.

[0027] The height of preheating zone 1 is 7000mm and the diameter is 5232mm. The higher height of preheating zone 1 provides a longer material residence path, so that the cold material and the high-temperature flue gas rising in the kiln are fully counter-currently contacted, maximizing the heat absorption and achieving a more complete preheating effect. The design of 5232mm diameter balances the material filling rate and airflow distribution, avoiding the situation that the material is too densely piled up and the airflow resistance is large due to a small diameter, and preventing the airflow short circuit caused by a large diameter, ensuring uniform preheating of the material and reducing the phenomenon of raw burning or over-burning. The height of calcining zone 2 is 10000mm and the diameter is 5312mm. The height of calcining zone 2 provides There is sufficient calcination space, the material residence time is extended, and calcium carbonate is fully decomposed into calcium oxide. The product has high activity and its diameter is slightly larger than the preheating zone 1, forming a micro-expansion structure to alleviate the volume expansion of the material due to decomposition and reduce the risk of calcination zone blockage. At the same time, it provides a more relaxed space for gas-solid reaction. The cooling zone 3 is conical, with a height of 9700mm, a diameter of 7462mm at the top, and a diameter of 6600mm at the bottom. The conical design of the cooling zone 3, which is wide at the top and narrow at the bottom, can better adapt to the volume shrinkage characteristics of the material during cooling, and avoid the increase of cooling wind resistance due to excessive accumulation of materials at the bottom.

[0028] Working principle: First, the limestone raw material is filled into the preheating zone 1. The material falls evenly into the chamber from the top of the preheating zone 1 and accumulates in the drop chute above the center plate 13. Then, the processed lime falls into the discharge barrel 4. At this time, the discharge is controlled by the discharge mechanism 6 and the air lock mechanism 7. The stepper motor 26 drives the disc 27 at the output end to rotate. The protruding column 28 on the disc 27 rotates with the disc 27, and its surface slides in the guide groove 25 of the blocking plate 23, converting the circular motion of the disc 27 into a linear motion of the blocking plate 23. When the blocking plate 23 moves back and forth in a straight line, the sliding post will slide back and forth inside the inclined groove 21 and the straight groove 20. When the blocking plate 23 slides toward the lower material frame 5, the sliding post gradually slides from the straight groove 20 to the inclined groove 21. When the sliding post slides to the connection between the inclined groove 21 and the straight groove 20, the blocking plate 23 completely blocks the bottom of the conical feeding chute 22 to lock the wind and prevent the outside air from flowing back. The sliding post continues to slide in the inclined groove 21. Due to the inclination angle of the inclined groove 21, the sliding post will be Lift it upward, and the movable plate 11 will move upward synchronously. At the same time, the upward movement of the movable plate 11 can pull the movable block 9 away from the center plate 13 through the connecting rod 10, and the sealing plate 15 will move horizontally synchronously to form an annular gap with the inner wall of the discharge hole 14. The lime will fall into the discharge barrel 4 from the four discharge holes 14. The stepper motor 26 will continue to drive the disc 27 at the output end to rotate. When the sealing plate 23 slides in the opposite direction of the lower material frame 5, the sliding column will slide from the inclined groove 21 to the linear groove 20. When the sliding column slides to the intersection of the inclined groove 21 and the linear groove 20, the sliding column will slide from the inclined groove 21 to the linear groove 20. When the connection between the movable plate 11 and the material is reached, the movable plate 11 will move downward, the connecting rod 10 pushes the moving block 9 to make the sealing plate 15 fit the discharge hole 14, cutting off the discharge channel, and the sliding column continues to move in the linear groove 20, and the sealing plate 23 moves away from the conical discharge trough 22, and the material can be discharged from the conical discharge trough 22. Finally, when the sealing plate 23 slides back and forth driven by the stepping motor 26, the rack 31 of the guide bar 24 drives the gear 30 to rotate, and the scraping bar 33 continuously scrapes off the adhered material on the inner wall of the conical discharge trough 22 to ensure that the discharge channel is unobstructed without manual intervention.

[0029] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A double-chamber lime shaft kiln, comprising a preheating zone (1), characterized in that: The preheating zone (1) is connected to a calcining zone (2) below, the calcining zone (2) is connected to a cooling zone (3) below, the cooling zone (3) is connected to a discharge barrel (4) below, the discharge barrel (4) is connected to a discharge frame (5) below, a conical discharge trough (22) is provided inside the discharge frame (5), a discharge trough is provided through the inside of the discharge barrel (4), a center plate (13) is fixedly installed inside the discharge trough, four discharge holes (14) are evenly provided at the end corners of the center plate (13), a discharge mechanism (6) is provided inside the discharge barrel (4), the discharge mechanism (6) includes four sealing plates (15), the four sealing plates (15) are movably installed in the four discharge holes (14) respectively, a movable plate (11) is movably provided on the outside of the discharge barrel (4), and the movable plate (11) is used to In order to operate the sealing plate (15), a wind locking mechanism (7) is provided inside the blanking frame (5), and the wind locking mechanism (7) includes a blocking plate (23), and the blocking plate (23) is slidably installed at the bottom of the blanking frame (5). A guide bar (24) is provided at the end of the blocking plate (23). A stable groove is provided at the bottom of the blanking frame (5), and the guide bar (24) is slidably installed in the stable groove. Guide columns (17) are installed at the four end corners of the movable plate (11). A rectangular block (18) is fixedly provided at the bottom of one of the guide columns (17) close to the guide bar (24), and a sliding column is installed on the surface of the rectangular block (18). A path groove (19) is provided on the surface of the guide bar (24), and the surface of the sliding column is slidably installed in the path groove (19).

2. A double-chamber lime shaft kiln according to claim 1, characterized in that: The preheating zone (1), the calcining zone (2), the cooling zone (3), the discharge barrel (4) and the discharge frame (5) are combined into a chamber, and two chambers are arranged in parallel. When one of the chambers is calcining and discharging, the other chamber is preheating and loading, and the two chambers circulate alternately.

3. A double-chamber lime shaft kiln according to claim 1, characterized in that: A shielding ring (16) is provided inside the blanking chute and above the center plate (13); the sealing plate (15) is slidably installed below the shielding ring (16); an extrusion column (12) is fixedly installed in the middle of the sealing plate (15); the surface of the extrusion column (12) moves through the blanking barrel (4); a moving block (9) is fixedly installed at one end of the extrusion column (12) outside the blanking barrel (4); a slide groove (8) is provided on the upper surface of the blanking barrel (4) and below the moving block (9); a slider is provided below the moving block (9) and slidably installed in the slide groove (8).

4. A double-chamber lime shaft kiln according to claim 3, characterized in that: A connecting rod (10) is installed above the moving block (9) via a rotating shaft, and the other end of the connecting rod (10) is connected to the movable plate (11) via a rotating shaft.

5. A double-chamber lime shaft kiln according to claim 1, characterized in that: A stepper motor (26) is provided below the blocking plate (23), a guide groove (25) is provided in the middle of the blocking plate (23), a disc (27) is provided at the output end of the stepper motor (26), a protruding column (28) is installed on the end surface of the top of the disc (27), and the surface of the protruding column (28) is movably provided in the guide groove (25).

6. A double-chamber lime shaft kiln according to claim 1, characterized in that: A circular groove (29) is provided inside the blanking frame (5) and on the side of the conical blanking trough (22). A gear (30) is installed inside the circular groove (29). A protruding ring (32) is fixedly provided inside the gear (30). The protruding ring (32) is movably installed inside the conical blanking trough (22). Four scraping strips (33) are evenly installed on the surface of the protruding ring (32). The scraping strips (33) are close to the inner wall of the conical blanking trough (22). A rack (31) is provided on the surface of the guide strip (24). The rack (31) is engaged with the gear (30).

7. A double-chamber lime shaft kiln according to claim 1, characterized in that: The path groove (19) comprises a straight groove (20) and an inclined groove (21), the bottom end of the inclined groove (21) is connected to the inclined groove (21), and the inclined groove (21) is close to the blanking frame (5).

8. A double-chamber lime shaft kiln according to claim 1, characterized in that: The preheating zone (1) has a height of 7000 mm and a diameter of 5232 mm.

9. A double-chamber lime shaft kiln according to claim 1, characterized in that: The calcination zone (2) has a height of 10,000 mm and a diameter of 5,312 mm.

10. A double-chamber lime shaft kiln according to claim 1, characterized in that: The cooling belt (3) is conical, with a height of 9700 mm, a diameter of 7462 mm at the top, and a diameter of 6600 mm at the bottom.

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