A furnace slag heat energy utilization device of a blast furnace ash rotary kiln

Abstract

This utility model discloses a slag heat energy utilization device for a rotary kiln of blast furnace ash, including a waste heat recovery cylinder and a top cover installed on the upper end of the waste heat recovery cylinder. The waste heat recovery cylinder is inclined, and a feed pipe is inserted into the upper right side of the top cover. A waste heat recovery mechanism is provided inside the waste heat recovery cylinder, and an anti-bridging mechanism is provided inside the feed pipe. The waste heat recovery mechanism includes a base, a dual-shaft motor, a conical extrusion shaft, several spiral blades, a servo cylinder, a push plate, an arc-shaped heat-conducting plate, and a water storage tank. The beneficial effect of this utility model is that by setting up a waste heat recovery mechanism inside the waste heat recovery cylinder, and using a dual-shaft motor to drive the conical extrusion shaft in conjunction with the push plate to squeeze and crush the kiln slag, the heat inside the waste slag is quickly released. The water storage tank achieves heat energy exchange through the arc-shaped heat-conducting plate, effectively improving the heat energy exchange rate.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln heat energy utilization technology, specifically a device for utilizing the heat energy of blast furnace ash rotary kiln slag. Background Technology

[0002] Blast furnace ash is loaded into a rotary volatilization kiln via a belt conveyor. The temperature in the reaction zone of the volatilization kiln is 1100~1200℃, and the temperature of the flue gas at the kiln tail is 500±20℃. The blast furnace ash is heated by combustion in the rotary kiln using its own calorific value and an external heat source, causing the metallic Zn in the material to volatilize and enter the gas phase. In the gas phase, it is oxidized into coarse zinc oxide dust, which is then drawn out by an induced draft fan and collected in the dust bin of a high-efficiency bag filter, becoming coarse zinc oxide powder. Smelting waste slag is discharged from the kiln head, cooled by water quenching, and then sent to the magnetic separation beneficiation process. The kiln head is equipped with a waste gas collection, cooling, and purification device.

[0003] An existing patent application (CN202323302707.1) discloses a device for utilizing the heat energy of blast furnace ash rotary kiln slag. This device uses a rotating rod in conjunction with a connecting plate and an arc-shaped plate to turn and stir the slag, along with a water storage tank, thereby achieving the recovery and utilization of the slag's heat energy. However, using a single stirring method cannot effectively release the heat inside the slag, resulting in a low heat exchange rate. Furthermore, the slag requires a prolonged cooling period, further impacting the heat recovery efficiency. Utility Model Content

[0004] To address the above deficiencies, this utility model provides a device for utilizing the thermal energy of blast furnace ash rotary kiln slag, thereby solving the problem of slag thermal energy utilization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for utilizing the heat energy of slag in a rotary kiln for blast furnace ash includes a waste heat recovery cylinder and a top cover installed on the upper end of the waste heat recovery cylinder. The waste heat recovery cylinder is inclined, and a feed pipe is inserted into the upper right side of the top cover. A waste heat recovery mechanism is provided inside the waste heat recovery cylinder, and an anti-bridging mechanism is provided inside the feed pipe.

[0007] The waste heat recovery mechanism includes a base, a dual-axis motor, a conical extrusion shaft, several helical blades, a servo cylinder, a push plate, an arc-shaped heat-conducting plate, and a water storage tank. The base is installed on the right side of the waste heat recovery cylinder, the dual-axis motor is installed on the base, the conical extrusion shaft is movably inserted into the waste heat recovery cylinder, and its right end is connected to the left rotating end of the dual-axis motor. Several helical blades are evenly installed on the conical extrusion shaft. The servo cylinder is installed on the left side of the waste heat recovery cylinder, and its telescopic end is movably inserted into the waste heat recovery cylinder. The push plate is installed on the telescopic end of the servo cylinder. The arc-shaped heat-conducting plate is located on the bottom left side of the waste heat recovery cylinder, and the water storage tank is installed outside the arc-shaped heat-conducting plate.

[0008] Furthermore, the anti-bridging mechanism includes a drive shaft, a rotating shaft, a universal coupling, and a set of opposing material-pushing plates. The drive shaft is movably mounted on the rear end of the base, and the rotating shaft is movably inserted into the feed pipe. One end of the universal coupling is connected to the drive shaft, and the other end is connected to the rotating shaft. A set of opposing material-pushing plates is installed at the center of the rotating shaft. The set of opposing material-pushing plates can push the waste residue entering the feed pipe, thereby preventing bridging.

[0009] Furthermore, the right rotating end of the dual-axis motor is connected to the transmission shaft via a set of transmission gears to achieve transmission shaft drive.

[0010] Furthermore, the push plate is evenly provided with several extrusion teeth, which can achieve the effect of extruding and crushing waste residue.

[0011] Furthermore, the water storage tank has an inlet at the top and a drain at the bottom. The inlet 18 is connected to an external water pipe, and the drain is connected to an external insulated hot water tank.

[0012] Furthermore, a discharge port is opened on the left side of the bottom of the waste heat recovery cylinder, and the upper end of the feed pipe is connected to the slag discharge port at the bottom of the dust collector. The waste slag falls into the feed pipe through the slag discharge port at the bottom of the dust collector. After the waste slag in the waste heat recovery cylinder has completed heat exchange, the servo cylinder drives the push plate to move to the left, the discharge port opens, the waste heat recovery cylinder is tilted, and with the rotation of several spiral blades, the waste slag is discharged through the discharge port.

[0013] This utility model provides a slag heat energy utilization device for a rotary kiln of blast furnace ash, which has the following beneficial effects: by setting up a waste heat recovery mechanism in the waste heat recovery cylinder, a dual-shaft motor drives a conical extrusion shaft in conjunction with a push plate to extrude and crush the kiln slag, thereby rapidly releasing the heat inside the waste slag; the water storage tank achieves heat exchange through an arc-shaped heat conduction plate, effectively improving the heat exchange rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a blast furnace ash rotary kiln slag heat energy utilization device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the anti-bridging mechanism of this utility model.

[0016] Figure 3 This is a side view of the waste heat recovery cylinder described in this utility model.

[0017] Figure 4 This is an external view of the waste heat recovery cylinder described in this utility model.

[0018] In the diagram: 1. Waste heat recovery cylinder; 2. Top cover; 3. Feed pipe; 4. Base; 5. Dual-shaft motor; 6. Conical extrusion shaft; 7. Spiral blade; 8. Servo cylinder; 9. Push plate; 10. Arc-shaped heat conduction plate; 11. Water storage tank; 12. Drive shaft; 13. Rotating shaft; 14. Universal coupling; 15. Feeding plate; 16. Drive gear; 17. Extrusion teeth; 18. Water inlet; 19. Drain outlet; 20. Discharge outlet. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] Please see Figures 1 to 4 As shown in the figure, this application provides a slag heat energy utilization device for a rotary kiln of blast furnace ash, including a waste heat recovery cylinder 1 and a top cover 2 installed on the upper end of the waste heat recovery cylinder 1. The waste heat recovery cylinder 1 is inclined, and a feed pipe 3 is inserted into the upper right side of the top cover 2. A waste heat recovery mechanism is provided inside the waste heat recovery cylinder 1, and an anti-bridging mechanism is provided inside the feed pipe 3. The waste heat recovery mechanism includes a base 4, a dual-shaft motor 5, a conical extrusion shaft 6, several spiral blades 7, a servo cylinder 8, a push plate 9, an arc-shaped heat-conducting plate 10, and a water storage tank 11. The base 4 is installed with... On the right side of the waste heat recovery cylinder 1, a dual-axis motor 5 is mounted on the base 4. A conical extrusion shaft 6 is movably inserted into the waste heat recovery cylinder 1 through a fastening bearing, and its right end is connected to the left rotating end of the dual-axis motor 5. Several spiral blades 7 are evenly installed on the conical extrusion shaft 6. A servo cylinder 8 is installed on the left side of the waste heat recovery cylinder 1, and its telescopic end is movably inserted into the waste heat recovery cylinder 1. A push plate 9 is installed on the telescopic end of the servo cylinder 8. An arc-shaped heat-conducting plate 10 is set on the bottom left side of the waste heat recovery cylinder 1, and a water storage tank 11 is installed outside the arc-shaped heat-conducting plate 10.

[0021] In this embodiment, the initial position of the push plate 9 is as follows: Figure 1 As shown, the dual-shaft motor 5 is used to act as a material retainer. During waste heat recovery, the dual-shaft motor 5 starts working first, driving the conical extrusion shaft 6 and several spiral blades 7 to rotate through the left rotating end, causing the waste residue to move to the left inside the waste heat recovery cylinder 1. The diameter of the conical extrusion shaft 6 gradually increases to the left. In conjunction with the push plate 9, the waste residue can be crushed by force, thereby quickly releasing the heat inside the waste residue. The arc-shaped heat conduction plate 10 is made of copper and has good thermal conductivity. The water storage tank 11 achieves heat exchange through the arc-shaped heat conduction plate 10, effectively improving the heat exchange rate.

[0022] In some embodiments, the anti-bridging mechanism includes a drive shaft 12, a rotating shaft 13, a universal coupling 14, and a set of opposing material-pushing plates 15. The drive shaft 12 is movably mounted on the rear end of the base 4 via a fastening bearing, and the rotating shaft 13 is movably inserted into the feed pipe 3 via a fastening bearing. One end of the universal coupling 14 is connected to the drive shaft 12, and the other end is connected to the rotating shaft 13. A set of opposing material-pushing plates 15 is installed at the center of the rotating shaft 13.

[0023] and in conjunction with the appendix Figure 2 As shown, the dual-shaft motor 5 is a dual-shaft extension asynchronous motor, characterized by having two extension shafts. These two shafts can run at different speeds at the same time. When the dual-shaft motor 5 is working, it simultaneously drives the transmission shaft 12 to rotate through the right rotating end. The transmission shaft 12 drives the rotating shaft 13 and a set of opposing material-pushing plates 15 to rotate through the universal coupling 14. The set of opposing material-pushing plates 15 can push the waste residue entering the feed pipe 3 to prevent bridging.

[0024] In some embodiments, the right rotating end of the dual-axis motor 5 is connected to the transmission shaft 12 via a set of transmission gears 16 to realize the transmission of the transmission shaft 12.

[0025] In some embodiments, the push plate 9 is uniformly provided with a plurality of extrusion teeth 17, which can achieve the effect of extruding and crushing waste residue.

[0026] In some embodiments, the water storage tank 11 has an inlet 18 at the top, which is connected to an external water pipe for filling the water storage tank 11 with water, and a drain 19 at the bottom, which is connected to an external insulated hot water tank for conveying and insulating the heat-exchanged hot water.

[0027] In some embodiments, a discharge port 20 is opened on the left side of the bottom of the waste heat recovery cylinder 1. The upper end of the feed pipe 3 is connected to the slag discharge port at the bottom of the dust collector. Waste slag falls into the feed pipe 3 through the slag discharge port at the bottom of the dust collector. When the waste slag in the waste heat recovery cylinder 1 has completed heat exchange, the servo cylinder 8 drives the push plate 9 to move to the left, the discharge port 20 opens, the waste heat recovery cylinder 1 is tilted, and with the rotation of several spiral blades 7, the waste slag is discharged through the discharge port 20.

[0028] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A device for utilizing the heat energy of blast furnace ash rotary kiln slag, comprising a waste heat recovery cylinder (1) and a top cover (2) installed on the upper end of the waste heat recovery cylinder (1), wherein the waste heat recovery cylinder (1) is inclined, and a feed pipe (3) is inserted into the upper right side of the top cover (2), characterized in that, The waste heat recovery cylinder (1) is equipped with a waste heat recovery mechanism, and the feed pipe (3) is equipped with an anti-bridging mechanism. The waste heat recovery mechanism includes a base (4), a dual-axis motor (5), a conical extrusion shaft (6), several spiral blades (7), a servo cylinder (8), a push plate (9), an arc-shaped heat-conducting plate (10), and a water storage tank (11). The base (4) is installed on the right side of the waste heat recovery cylinder (1). The dual-axis motor (5) is installed on the base (4). The conical extrusion shaft (6) is movably inserted into the waste heat recovery cylinder (1), and its right end is connected to the left rotating end of the dual-axis motor (5). Several spiral blades (7) are evenly installed on the conical extrusion shaft (6). The servo cylinder (8) is installed on the left side of the waste heat recovery cylinder (1), and its telescopic end is movably inserted into the waste heat recovery cylinder (1). The push plate (9) is installed on the telescopic end of the servo cylinder (8). The arc-shaped heat-conducting plate (10) is located on the bottom left side of the waste heat recovery cylinder (1). The water storage tank (11) is installed outside the arc-shaped heat-conducting plate (10).

2. The slag heat energy utilization device of a blast furnace ash rotary kiln according to claim 1, characterized in that, The anti-bridging mechanism includes a drive shaft (12), a rotating shaft (13), a universal coupling (14), and a set of opposing material-pushing plates (15). The drive shaft (12) is movably mounted on the rear end of the base (4), the rotating shaft (13) is movably inserted into the feed pipe (3), one end of the universal coupling (14) is connected to the drive shaft (12), and the other end is connected to the rotating shaft (13). A set of opposing material-pushing plates (15) is installed at the center of the rotating shaft (13).

3. The slag heat energy utilization device of a blast furnace ash rotary kiln according to claim 2, characterized in that, The right rotating end of the dual-axis motor (5) is connected to the transmission shaft (12) via a set of transmission gears (16).

4. The slag heat energy utilization device of a blast furnace ash rotary kiln according to claim 1, characterized in that, The push plate (9) is evenly provided with a number of extrusion teeth (17).

5. The slag heat energy utilization device of a blast furnace ash rotary kiln according to claim 1, characterized in that, The water storage tank (11) has an inlet (18) at the top and a drain (19) at the bottom.

6. The slag heat energy utilization device of a blast furnace ash rotary kiln according to claim 1, characterized in that, The waste heat recovery cylinder (1) has a discharge port (20) on the left side of the bottom, and the upper end of the feed pipe (3) is connected to the slag discharge port at the bottom of the dust collector.

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