Rotary kiln deslagging mechanism

Abstract

The deslagging mechanism comprises a slag falling well arranged below a slag falling opening of the rotary kiln, a conveying box is arranged below the slag falling well, conveying paddles are arranged in the conveying box, a conveying motor is arranged on the side wall of the conveying box, a slag outlet is formed in the lower portion of the front end of the conveying box, and a slag box is arranged below the slag outlet. A heat exchange pipe is wound on the outer wall of the conveying box, one end of the heat exchange pipe is connected to the cold water tank through a first pump machine, and the other end of the heat exchange pipe is connected to the hot water tank; a first isolation door is arranged on the slag falling well, and a second isolation door is arranged on the slag outlet; a control box is arranged on the conveying box, a control button is arranged on the control box, and a PLC is arranged in the control box. The heat exchange pipe is wound on the outer wall of the conveying box, cold water is conveyed into the heat exchange pipe, and when the conveying box conveys high-temperature slag, the high-temperature slag is subjected to heat exchange and cooling, so that the temperature of the slag is reduced, and efficient recycling of the waste slag of the rotary kiln is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, and more particularly to a slag discharging mechanism of a rotary kiln. Background Art

[0002] A rotary kiln is a rotating calcining kiln. Its rotational motion uniformly heats and mixes materials within the kiln. It is an important thermal engineering device widely used in a variety of fields, including building materials, metallurgy, chemicals, and environmental protection. The operating principle of a rotary kiln is primarily based on its rotating cylinder. Materials enter the kiln from one end and gradually move toward the other end as the cylinder rotates. During this movement, the materials are subjected to high temperatures and other processing conditions, causing chemical and physical changes.

[0003] The slag discharge mechanism of the rotary kiln is an important part of the rotary kiln equipment for processing waste slag. The performance of the slag discharge mechanism is the key to whether the waste slag of the rotary kiln can be discharged from the kiln efficiently and safely.

[0004] The temperature of the slag discharged from the rotary kiln is relatively high. During the slag discharge process, the slag needs to be cooled before being collected. Existing rotary kilns usually use water cooling to cool the slag during the slag discharge process. This causes the bottom slag to have a very high moisture content after cooling. The ton bags or slag boxes containing the bottom slag will continuously precipitate wastewater, polluting the environment of the workshop or slag storage, and also bringing difficulties to the subsequent disposal of the ash. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a rotary kiln slag discharging mechanism to solve the problems in the background technology.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] The slag discharging mechanism of a rotary kiln comprises a slag well arranged below a slag outlet of the rotary kiln, a conveying box for conveying slag is arranged below the slag well, a conveying paddle is arranged in the conveying box, a conveying motor for driving the conveying paddle to rotate is arranged on the side wall of the conveying box, a slag outlet for discharging slag is arranged at the lower front end of the conveying box, and a slag box for collecting the slag is arranged below the slag outlet; a heat exchange pipe for cooling and exchanging heat for the high-temperature slag conveyed in the conveying box is wound around the outer wall of the conveying box, one end of the heat exchange pipe is connected to the cold water tank through a first pump, and the other end of the heat exchange pipe is connected to the hot water tank; a first isolation door for controlling whether the slag outlet of the rotary kiln is discharged is provided on the slag well, and a second isolation door for controlling whether the conveying box discharges slag into the slag box is provided on the slag outlet; a control box is provided on the conveying box, a control button is provided on the control box, a PLC controller is provided inside the control box, an output end of the control button is connected to an input end of the PLC controller, and an output end of the PLC controller is connected to the conveying motor and the first pump respectively.

[0008] To further optimize the technical solution, the hot water tank is provided in multiple pieces, each of which is connected to a heat exchange pipe respectively. A liquid level sensor for detecting the liquid level information in the hot water tank is provided inside the hot water tank, and a water inlet solenoid valve for controlling the water inlet is provided at the water inlet of the hot water tank. The output end of the liquid level sensor is connected to the input end of the PLC controller, and the output end of the PLC controller is connected to the input end of the water inlet solenoid valve.

[0009] To further optimize the technical solution, the water outlet of the hot water tank is connected to the water inlet of the cold water tank through a pipe, a water outlet solenoid valve for controlling the water outlet is provided at the water outlet of the hot water tank, and a temperature sensor for detecting the temperature of hot water in the hot water tank is provided in the hot water tank, the output end of the temperature sensor is connected to the input end of the PLC controller, and the output end of the PLC control cavity is connected to the input end of the water outlet solenoid valve.

[0010] To further optimize the technical solution, a second pump is provided on the pipeline for pumping hot water in the hot water tank into the cold water tank, and the input end of the second pump is connected to the output end of the PLC controller.

[0011] To further optimize the technical solution, a water supply pipe for replenishing water is provided on the cold water tank.

[0012] To further optimize the technical solution, the bottom of the slag box is provided with universal wheels for easy movement, and the side ends of the slag box are provided with handles for pushing the slag box to move.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0014] The utility model provides a rotary kiln slag discharge mechanism, which winds a heat exchange tube on the outer wall of a conveying box and supplies cold water into the heat exchange tube. When the conveying box transports high-temperature slag, the high-temperature slag is cooled by heat exchange, thereby reducing the temperature of the slag and realizing efficient recovery of the rotary kiln waste slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Among them: 1. Rotary kiln slag outlet, 2. Slag well, 3. First isolation door, 4. Conveying box, 5. Heat exchange pipe, 6. Conveying blade, 7. Conveying motor, 8. First pump, 9. Cold water tank, 10. Slag outlet, 11. Second isolation door, 12. Slag box, 13. Hot water tank, 14. Water inlet solenoid valve, 15. Liquid level sensor, 16. Temperature sensor, 17. Pipeline, 18. Water outlet solenoid valve, 19. Second pump, 20. Control box, 21. Water supply pipe. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] A rotary kiln slag discharge mechanism, combined with Figure 1 As shown, the rotary kiln comprises a slag well 2 disposed below a slag outlet 1 of the rotary kiln. A conveyor box 4 is disposed below the slag well 2 for conveying slag. Conveying paddles 6 are disposed within the conveyor box 4. Conveying motors 7 are disposed on the sidewalls of the conveyor box 4 to drive the paddles to convey the slag forward. A slag outlet 10 is disposed at the lower front end of the conveyor box 4 for discharging slag. A slag box 12 is disposed below the slag outlet 10 for collecting the slag.

[0019] A first isolation door 3 is provided on the slag dropout hole 2 to control whether the rotary kiln discharges slag into the conveyor box. A second isolation door 11 is provided on the slag outlet of the conveyor box to control whether the conveyor box discharges slag into the slag box 12. When replacing the slag box, closing the first and second isolation doors does not affect the normal operation of the rotary kiln and does not cause blockage of the conveyor box.

[0020] The bottom of the slag box 12 is provided with universal wheels, and the side ends of the slag box 12 are provided with handles. The slag box is pushed by the handles, and the universal wheels at the bottom facilitate the movement of the slag box, reducing the labor intensity of the staff.

[0021] A control box 20 is provided on the conveying box 4 , and a control button is provided on the control box 20 . A PLC controller is provided inside the control box. The output end of the control button is connected to the input end of the PLC controller, and the output end of the PLC controller is connected to the input end of the conveying motor 7 .

[0022] A heat exchange tube 5 is wound around the outer wall of the conveying box 4, which is used to cool down and exchange heat for the high-temperature slag transported in the conveying box. One end of the heat exchange tube 5 is connected to the cold water tank 9 through the first pump 8, and the other end of the heat exchange tube 5 is connected to the hot water tank 13. The first pump sends the cold water in the cold water tank into the heat exchange tube. The cold water exchanges heat with the high-temperature slag transported in the conveying box through the heat exchange tube. The hot water after heat exchange enters the hot water tank for storage, and the cooled slag is transported to the slag outlet and enters the slag box for collection.

[0023] Multiple hot water tanks 13 are provided, each connected to a heat exchange tube 5. A liquid level sensor 15 is installed inside the hot water tank to detect the liquid level within the hot water tank. A water inlet solenoid valve 14 is installed at the water inlet of the hot water tank to control the flow of water from the heat exchange tube into the hot water tank. The output of the liquid level sensor is connected to the input of a PLC controller, which in turn is connected to the input of the water inlet solenoid valve. Hot water after heat exchange in the heat exchange tube is fed into the hot water tank. When the liquid level sensor in the hot water tank detects that the liquid level is full, the water inlet solenoid valve closes, and the heat exchange tube flows into another hot water tank.

[0024] The water outlets of the hot water tank 13 are connected to the water inlet ends of the cold water tank 9 through pipes 17. A water outlet solenoid valve 18 is provided at the water outlet of the hot water tank for controlling the water outlet of the hot water tank. A temperature sensor 16 is provided in the hot water tank 13 for detecting the temperature of the hot water in the hot water tank. The output end of the temperature sensor is connected to the input end of the PLC controller, and the output end of the PLC control chamber is connected to the input end of the water outlet solenoid valve.

[0025] A second pump 19 is installed on pipe 17 to pump the hot water from the hot water tank into the cold water tank. The input of the second pump is connected to the output of the PLC controller. When the temperature sensor detects that the hot water in the hot water tank has cooled, the water outlet solenoid valve on the hot water tank opens, and the second pump starts to pump the water from the hot water tank into the cold water tank for reuse.

[0026] In order to avoid water shortage in the cold water tank, a water supply pipe 21 is provided on the cold water tank 9 for supplying water into the cold water tank to ensure the cooling effect of the slag.

[0027] The utility model winds a heat exchange tube on the outer wall of the conveying box and conveys cold water into the heat exchange tube. When the conveying box conveys high-temperature slag, the high-temperature slag is cooled by heat exchange, so as to reduce the temperature of the slag and realize efficient recovery of rotary kiln waste slag.

Claims

1. A rotary kiln slag discharge mechanism, characterized by: The invention comprises a slag drop well (2) arranged below a slag drop port (1) of a rotary kiln, a conveying box (4) for conveying slag arranged below the slag drop well (2), a conveying blade (6) arranged in the conveying box (4), a conveying motor (7) for driving the conveying blade to rotate arranged on the side wall of the conveying box (4), a slag outlet (10) for slag discharge arranged at the lower front end of the conveying box (4), and a slag box (12) for collecting slag arranged below the slag outlet (10); a heat exchange pipe (5) for cooling and exchanging heat for high-temperature slag transported in the conveying box is wound around the outer wall of the conveying box (4), one end of the heat exchange pipe (5) is connected to a cold water tank (9) through a first pump (8), and the other end of the heat exchange pipe (5) is connected to a hot water tank (13); a first isolation door (3) for controlling whether slag is discharged from the slag drop port of the rotary kiln is provided on the slag drop well (2). ), a second isolation door (11) for controlling whether the conveying box discharges slag into the slag box (12) is provided on the slag outlet (10); a control box (20) is provided on the conveying box (4), a control button is provided on the control box, a PLC controller is provided inside the control box, the output end of the control button is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the conveying motor and the first pump; the hot water tank (13) is provided in plurality, each hot water tank (13) is respectively connected to the heat exchange pipe (5), a liquid level sensor (15) for detecting liquid level information in the hot water tank is provided inside the hot water tank (13), a water inlet solenoid valve (14) for controlling water inlet is provided at the water inlet of the hot water tank (13), the output end of the liquid level sensor is connected to the input end of the PLC controller, and the output end of the PLC controller is connected to the input end of the water inlet solenoid valve.

2. A rotary kiln slag discharge mechanism according to claim 1, characterized in that: The water outlet of the hot water tank (13) is connected to the water inlet of the cold water tank (9) through a pipe (17). A water outlet solenoid valve (18) for controlling water outlet is provided at the water outlet of the hot water tank. A temperature sensor (16) for detecting the temperature of hot water in the hot water tank is provided in the hot water tank (13). The output end of the temperature sensor is connected to the input end of the PLC controller, and the output end of the PLC control chamber is connected to the input end of the water outlet solenoid valve.

3. A rotary kiln slag discharge mechanism according to claim 2, characterized in that: The pipeline (17) is provided with a second pump (19) for pumping hot water in the hot water tank into the cold water tank (9), and the input end of the second pump is connected to the output end of the PLC controller.

4. A rotary kiln slag discharge mechanism according to claim 1, characterized in that: The cold water tank (9) is provided with a water supply pipe (21) for supplying water.

5. The rotary kiln slag discharge mechanism according to claim 1, characterized in that: The bottom of the slag box (12) is provided with universal wheels for facilitating movement, and the side end of the slag box (12) is provided with a handle for pushing the slag box to move.

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