Air supply and ash discharge system of lime kiln

Abstract

The utility model discloses an air supply ash discharge system of a lime kiln, which relates to the technical field of lime kilns, and comprises a furnace body, the bottom end of the furnace body is fixedly connected with a furnace bar, the furnace bar is provided with a plurality of material distribution ports along the circumferential direction of the furnace bar, the lower parts of the material distribution ports are fixedly connected with a material distribution cylinder, the bottom end of the material distribution cylinder is provided with an ash discharge machine, and the ash discharge machine is provided with an air supply device. Each material distribution barrel comprises two barrel bodies, the two barrel bodies are fixedly connected through a grid mesh, an air cap is arranged at the common circle center of the multiple material distribution barrels, the arrangement height of the air cap is matched with the height of the grid mesh, and an air supply pipe is fixedly connected into the air cap. According to the air supply and ash discharge system of the lime kiln, the air inlet height is reduced, materials can be fully cooled, and heat loss is reduced; and meanwhile, the partial combustion phenomenon can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of lime kiln technology, specifically to a lime kiln air supply and ash discharge system. Background Technology

[0002] A vertical lime kiln is a cylindrical device for burning lime, with material entering from the top and exiting from the bottom. It consists of a preheating zone, a calcination zone, and a cooling zone: the preheating zone preheats the material, the calcination zone burns the material, and the cooling zone cools the material and heats the air for use in the calcination zone.

[0003] To avoid uneven burning, a multi-channel ash discharge device for a vertical lime kiln is disclosed in Chinese Utility Model Patent Application No. CN201921668552.4. This device adopts a multi-channel ash discharge design, which can adjust for uneven burning.

[0004] However, the air intake system can also affect uneven calcination: areas with strong airflow may suffer material damage due to over-calcination, while areas with weak airflow may fail to achieve the desired calcination effect due to insufficient calcination. Furthermore, traditional lime kilns typically have two independent air supply and ash discharge systems. The air supply system often utilizes ducts or hoods, which are located above the ash discharge machine. This high placement can lead to premature cooling of the lime or excessively high ash temperatures, affecting the cooling effect.

[0005] Therefore, it is necessary to propose a lime kiln air supply and ash discharge system to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to provide a lime kiln air supply and ash discharge system to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a lime kiln air supply and ash discharge system, comprising a furnace body, a grate fixedly connected to the bottom of the furnace body, a plurality of material distribution ports opened along the circumference of the grate, a material distribution cylinder fixedly connected below the material distribution ports, an ash discharge machine provided at the bottom of the material distribution cylinder, the material distribution cylinder comprising two sections of cylinder, the two sections of cylinder being fixedly connected by a grid, an air cap provided at the common center of the plurality of material distribution cylinders, the height of the air cap being adapted to the height of the grid, and an air supply pipe fixedly connected inside the air cap.

[0010] Preferably, the grate includes a conical grate fixedly connected to the middle of the bottom end of the furnace body, and a plurality of flow guide grate are fixedly connected along the circumference of the conical grate, with the material distribution port located between two adjacent flow guide grates.

[0011] Preferably, the conical grate is a pyramid, and the arrangement position of the flow guide grate corresponds to the position of the side edge of the conical grate.

[0012] Preferably, the cross-section of the flow guide grate is inverted V-shaped.

[0013] Preferably, an ash hopper is provided below the material distribution cylinder, and a discharge port is connected to the bottom end of the ash hopper.

[0014] Preferably, the wind cap includes a cylinder and a conical cap, the conical cap being fixedly connected to the top of the cylinder, and the outer side of the cylinder having multiple air outlets along its circumference.

[0015] Preferably, a downwardly inclined guide plate is fixedly connected to the outer side of the cylinder.

[0016] Preferably, the ash discharge machine includes a stepped tray that is driven to reciprocate by a drive mechanism.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a lime kiln air supply and ash discharge system, which has the following beneficial effects:

[0019] 1. The lime kiln's air supply and ash discharge system reduces the air intake height by installing an air cap below the grate and arranging multiple material distribution cylinders around it, thereby enabling the material to be fully cooled and reducing heat loss.

[0020] 2. The lime kiln's air supply and ash discharge system can control the ash discharge volume of the material distribution cylinder through the ash discharge machine, and can adjust for uneven burning.

[0021] 2. The lime kiln's air supply and ash discharge system uses a guide grate and a conical grate to direct the material flow, preventing material from accumulating on the grate in areas far from the distribution port, thus making the discharge more uniform. Attached Figure Description

[0022] Figure 1 This is a cross-sectional schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a partially enlarged schematic diagram of the structure of this utility model;

[0024] Figure 3 This is a top view of the grate of this utility model.

[0025] In the diagram: 1. Furnace grate; 2. Furnace body; 4. Air cap; 5. Feeding cylinder; 6. Ash discharge machine; 7. Ash hopper; 8. Discharge port; 9. Guide grate; 10. Conical grate; 11. Grate; 12. Cylinder; 13. Air supply pipe; 14. Feeding port; 16. Conical cap; 17. Cylinder; 18. Air outlet; 19. Guide plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figure 1-3 As shown, a lime kiln air supply and ash discharge system includes a furnace body 2. A grate 1 is fixedly connected to the bottom of the furnace body 2. Several material distribution ports 14 are opened along the circumference of the grate 1. A material distribution cylinder 5 is fixedly connected below the material distribution ports 14. An ash discharge machine 6 is provided at the bottom of the material distribution cylinder 5. The material distribution cylinder 5 includes two cylinder sections 12, which are fixedly connected by a grid 11. An air cap 4 is provided at the common center of the multiple material distribution cylinders 5. The height of the air cap 4 is adapted to the height of the grid 11. An air supply pipe 13 is fixedly connected inside the air cap 4.

[0028] In operation, the material inside the furnace body 2 enters the material distribution cylinder 5 through the material distribution port 14, and is then discharged by the ash discharger 6. Air is then supplied to the air cap 4 through the air supply pipe 13, and the airflow passes through the grid 11 into the material distribution cylinder 5 to cool the material while simultaneously heating the incoming air, resulting in a lower ash discharge temperature and less heat loss. The ash discharge rate of the material distribution cylinder 5 can be controlled by the ash discharger 6, allowing for adjustments to address uneven burning.

[0029] In some embodiments, the grate 1 includes a conical grate 10 fixedly connected to the middle of the bottom end of the furnace body 2, and a plurality of guide grate 9 fixedly connected circumferentially along the conical grate 10. The material distribution port 14 is located between two adjacent guide grate 9. By using the combination of the conical grate 10 and the guide grate 9 to form the grate 1, it can guide the material to the distribution cylinder 5. Preferably, the conical grate 10 is a pyramid, the arrangement position of the guide grate 9 corresponds to the position of the side edge of the conical grate 10, and the cross-section of the guide grate 9 is inverted V-shaped. Under the combined action of the conical grate 10 and the guide grate 9, the guiding effect on the material is further improved.

[0030] To facilitate material discharge, an ash hopper 7 is provided below the material distribution cylinder 5, and a discharge port 8 is connected to the bottom end of the ash hopper 7. The material is received by the ash hopper 7 and then discharged through the discharge port 8.

[0031] In some embodiments, the vent cap 4 includes a cylinder 17 and a conical cap 16. The conical cap 16 is fixedly connected to the top of the cylinder 17, and a plurality of air outlet holes 18 are formed on the outer side of the cylinder 17 along its circumference. The conical cap 16 is provided to prevent dust accumulation above the vent cap 4. Preferably, a downwardly inclined guide plate 19 is fixedly connected to the outer side of the cylinder 17. The guide plate 19 is provided to prevent dust from entering the vent cap 4 through the air outlet holes 18.

[0032] In some embodiments, the ash discharger 6 includes multiple stepped pallets that are driven to reciprocate by a drive mechanism. The area of ​​the stepped pallets is larger than the area of ​​the lower opening of the distribution cylinder 5, and the height distance between the multiple stepped pallets and the lower opening of the distribution cylinder 5 is determined by the size of the material, and the height distance is twice the maximum particle size to be burned. The stepped pallets are driven to reciprocate by the drive mechanism to perform the material discharge operation.

[0033] 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 lime kiln air supply and ash discharge system, comprising a furnace body (2), wherein a grate (1) is fixedly connected to the bottom end of the furnace body (2), and a plurality of material distribution ports (14) are provided on the grate (1) along its circumference, wherein a material distribution cylinder (5) is fixedly connected below the material distribution ports (14), and an ash discharge machine (6) is provided at the bottom end of the material distribution cylinder (5), characterized in that: The material distribution cylinder (5) includes two cylinder sections (12), which are fixedly connected by a grid (11). A wind cap (4) is provided at the common center of the multiple material distribution cylinders (5). The height of the wind cap (4) is adapted to the height of the grid (11). An air supply pipe (13) is fixedly connected inside the wind cap (4). The wind cap (4) includes a cylinder (17) and a conical cap (16). The conical cap (16) is fixedly connected to the top of the cylinder (17). The outer side of the cylinder (17) is provided with a plurality of air outlet holes (18) along its circumference.

2. The lime kiln air supply and ash discharge system according to claim 1, characterized in that: The grate (1) includes a conical grate (10) fixedly connected to the middle of the bottom end of the furnace body (2), and a plurality of flow guide grate (9) fixedly connected along the circumference of the conical grate (10). The feed outlet (14) is located between two adjacent flow guide grate (9).

3. The lime kiln air supply and ash discharge system according to claim 2, characterized in that: The conical grate (10) is a pyramid, and the arrangement of the flow guide grate (9) corresponds to the position of the side edge of the conical grate (10).

4. The lime kiln air supply and ash discharge system according to claim 2, characterized in that: The cross-section of the flow guide grate (9) is inverted V-shaped.

5. The lime kiln air supply and ash discharge system according to claim 1, characterized in that: The material distribution cylinder (5) is provided with an ash hopper (7) below it, and the bottom end of the ash hopper (7) is connected to a discharge port (8).

6. The lime kiln air supply and ash discharge system according to claim 1, characterized in that: A guide plate (19) is fixedly connected to the outside of the cylinder (17).

7. The lime kiln air supply and ash discharge system according to claim 1, characterized in that: The ash discharge machine (6) includes a stepped tray that is driven to reciprocate by a drive mechanism.

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