Drying equipment for drying industrial waste

Abstract

The utility model relates to the technical field of cement raw material preparation equipment, in particular to drying equipment for drying industrial waste, which is characterized in that an air outlet is arranged at the top of a barrel, a material cone and a material scattering disc are arranged in the barrel, the material cone is arranged at the upper part in the barrel, and the bottom of the material cone is communicated with a vertical material pipe; the scattering disc is arranged at the lower part in the barrel, the bottom edge of the scattering disc is fixedly connected with a plurality of sweeping brushes, and the bottom center of the scattering disc is connected with rotating equipment; the feeding port is formed between the material scattering disc and the vertical material pipe, an air inlet is formed in the lower portion of the material scattering disc in the circumferential direction of the barrel, and a lower discharging pipe is arranged at the bottom of the air inlet. The utility model has the advantages that the water content requirement of the subsequent process production is met, the air inlet is prevented from being blocked, and the air inlet quantity and the air inlet distribution are prevented from being influenced.

Description

Technical Field

[0001] This utility model relates to the technical field of cement raw material preparation equipment, and in particular to a drying equipment for drying industrial waste. Background Technology

[0002] Currently, industrial waste remains a difficult problem to dispose of. Among them, calcium carbide slag, a type of industrial waste frequently generated during the production of acetylene gas and polyvinyl chloride, is also one of the most difficult to dispose of. Because calcium carbide slag contains high-quality calcium, it is often used as a raw material for cement production. This saves on the natural limestone resources needed for cement production and reduces pollution caused by waste stockpiling. However, before using waste calcium carbide slag, it contains a large amount of moisture and needs to be ground and dried before being used as a cement production raw material.

[0003] In the prior art, Chinese Patent Publication No. CN 217411878 U discloses a crushing and drying device for carbide slag. The specific technology includes a shell, a roller crushing structure and a secondary crushing structure connected to the shell to crush the carbide slag. The shell is provided with an air inlet, and the carbide slag in the mixing chamber of the shell is heat-exchanged by high-temperature flue gas to dry the wet carbide slag. The dried fine powder is discharged through the discharge port with the hot air.

[0004] Existing carbide slag drying devices often fail to meet subsequent process requirements due to the high moisture content of the carbide slag. During the drying process, the fine powder of carbide slag is dispersed with the hot air and easily accumulates inside the shell, even blocking the air inlet, which affects the air volume and air distribution of the drying device. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a drying device for drying industrial waste.

[0006] The technical solution of this utility model is: a drying device for drying industrial waste, including a cylinder with a feed inlet and an air inlet; specifically, an air outlet is provided at the top of the cylinder, and a material cone and a spreading disc are provided inside the cylinder. The material cone is located in the upper part of the cylinder, and its bottom is connected to a vertical material pipe; the spreading disc is located in the lower part of the cylinder, and several sweeping brushes are fixedly connected to the bottom edge of the spreading disc, and a rotating device is connected to the center of the bottom of the spreading disc; the feed inlet is provided between the spreading disc and the vertical material pipe, and an air inlet is provided along the circumference of the cylinder below the spreading disc, with a lower discharge pipe provided at the bottom of the air inlet.

[0007] Furthermore, to prevent the scattered calcium carbide slag powder from accumulating and clogging the material cone, an upper discharge pipe is provided on the vertical material pipe, which extends obliquely downward from the top of the vertical material pipe out of the cylinder.

[0008] Furthermore, in order to improve the precision of production and accurately control the source of the fine powder of carbide slag inside the cylinder, a gate valve is also provided on the vertical material pipe. The gate valve is located below the connection between the vertical material pipe and the upper discharge pipe.

[0009] Furthermore, in order to ensure uniform material feeding in the dryer and improve production stability, a screw feeder is installed at the feed inlet. The feed end of the screw feeder is placed outside the cylinder, the discharge end of the screw feeder is connected to the bottom of the vertical material pipe, and the discharge end of the screw feeder is located at the center above the spreading disc.

[0010] Furthermore, in order to improve the control of the direction and speed of the hot air in the air inlet and improve production stability, an air ring is fixedly installed circumferentially inside the cylinder. The air ring is located between the air inlet and the spreading disc. The air ring consists of two annular air plates and multiple air vanes arranged between the two air plates, wherein the outer annular air plate is fixed inside the cylinder.

[0011] Furthermore, to reduce the erosion of the cylinder by calcium carbide slag material or calcium carbide slag powder and reduce damage, a wear-resistant plate is fixedly connected inside the cylinder. The wear-resistant plate is located above the spreading disc and includes an upper wear-resistant plate and a lower wear-resistant plate. The top of the upper wear-resistant plate is arranged circumferentially along the inner wall of the cylinder, and the upper wear-resistant plate is inclined downward towards the center of the cylinder. The bottom of the upper wear-resistant plate is connected to the top of the lower wear-resistant plate, and the bottom of the lower wear-resistant plate is arranged on the inner wall of the cylinder or on the outside of the air ring.

[0012] Furthermore, to prevent excessive air pressure inside the cylinder from causing abnormalities, an explosion-proof valve is also installed at the top of the cylinder.

[0013] Furthermore, to improve the uniformity and stability of airflow inside the cylinder, a guide plate is also provided inside the cylinder, and the guide plate is fixedly installed on the top of the material cone.

[0014] Furthermore, to increase the spreading speed of the spreading disc, the spreading disc is circular with its edges raised in an arc shape, and multiple arc-shaped baffles are evenly provided on the circular surface of the spreading disc.

[0015] Furthermore, in order to increase the speed of material spreading and reduce the resistance caused by the rotation of the spreading disc, the arc of the arc-shaped baffle is 0.89 degrees to 0.91 degrees.

[0016] Furthermore, to increase the speed of material spreading, the edge of the spreading disc is raised at a 30° arc, which helps to reduce the amount of material falling into the air ring and then entering the lower discharge pipe.

[0017] The beneficial effects of this utility model are as follows: the drying equipment designed by this utility model can ensure that the fine powder of carbide slag blown out of the air outlet is a dried finished product with a moisture content of less than 1%, which can be directly used for subsequent process production.

[0018] A sweeping brush is fixedly connected to the bottom edge of the spreading disc. When the spreading disc rotates, the sweeping brush rotates with the spreading disc, sweeping the scattered carbide slag material or carbide slag fine powder from the air inlet and sending it out of the dryer after falling into the lower discharge pipe, thus preventing the air inlet from being blocked and avoiding the air volume and air distribution of the drying device being affected. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the wear-resistant plate portion inside the cylinder of this utility model;

[0021] Figure 3 This is a top-view enlarged schematic diagram of the material spreading disc of this utility model;

[0022] Figure 4 This is a side enlarged schematic diagram of the material spreading disc of this utility model;

[0023] In the picture:

[0024] 1. Cylinder body 2. Feeding disc 3. Feed cone

[0025] 4. Screw feeder 5. Explosion-proof valve 6. Air outlet

[0026] 7. Air guide plate; 8. Vertical material pipe; 9. Upper discharge pipe

[0027] 10 Gate valve; 11 Air inlet; 12 Material sweeping brush

[0028] 13. Air ring; 14. Wear-resistant plate; 15. Lower discharge pipe

[0029] 16. Curved baffle Detailed Implementation

[0030] 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.

[0031] A drying device for drying industrial waste includes a cylinder 1, an explosion-proof valve 5 at the top of the cylinder 1, an air outlet 6 near the explosion-proof valve 5 at the top of the cylinder 1, a material cone 3 in the upper part of the cylinder 1, a guide plate 7 fixedly installed at the top of the material cone 3, a vertical material pipe 8 connected to the bottom of the material cone 3, an upper discharge pipe 9 and a gate valve 10 on the vertical material pipe 8, the upper discharge pipe 9 obliquely exiting the cylinder 1 from the upper part of the vertical material pipe 8, and the gate valve 10 located below the connection between the vertical material pipe 8 and the upper discharge pipe 9;

[0032] A screw feeder 4 is provided in the lower part of the cylinder 1. The feed end of the screw feeder 4 is placed outside the cylinder 1. The discharge end of the screw feeder 4 is connected to the bottom of the vertical material pipe 8. The discharge end of the screw feeder 4 is located at the center above the spreading disc 2.

[0033] The lower part of the cylinder 1 is provided with a material spreading disc 2 and an air inlet 11. The top view of the material spreading disc 2 is as follows. Figure 3 As shown, the spreading disc 2 is circular with its edge curved upwards at an angle of 30°. Eight curved baffles 16 are evenly arranged on the circular surface of the spreading disc 2, with an angle of 0.89 to 0.91 degrees. When the spreading disc 2 rotates clockwise, these curved baffles 16 can throw the material toward the edge of the spreading disc with minimal resistance.

[0034] Three to five sweeping brushes 12 are fixedly connected to the bottom edge of the spreading disc 2. The sweeping brushes 12 rotate together with the spreading disc 2. An air inlet 11 is set below the sweeping brushes 12 along the circumference of the cylinder 1. The air inlet 11 is located below the spreading disc 2. Inside the cylinder 1 between the air inlet 11 and the spreading disc 2, an air ring 13 is also fixed along the circumference of the cylinder 1. The air ring 13 consists of two annular air plates and multiple air blades set between the two air plates. The outer annular air plate is fixed inside the cylinder 1.

[0035] Inside the cylinder 1, above the spreading disc 2, a wear-resistant plate 14 is fixedly connected. The wear-resistant plate 14 includes an upper wear-resistant plate and a lower wear-resistant plate. The top of the upper wear-resistant plate is arranged circumferentially along the inner wall of the cylinder. The upper wear-resistant plate is inclined downward towards the center of the cylinder 1. The bottom of the upper wear-resistant plate is connected to the top of the lower wear-resistant plate. The bottom of the lower wear-resistant plate is located outside the air ring 13. A lower discharge pipe 15 is provided at the bottom of the air inlet 11. One end of the lower discharge pipe 15 is connected to the air inlet 11 and is located below the brush head of the sweeping brush 12. The other end of the lower discharge pipe 15 passes through the cylinder 1 and is placed outside the cylinder 1.

[0036] In actual operation

[0037] Hot air, approximately 255°C, from the waste heat power generation unit at the kiln tail enters the dryer through inlet 11. At this time, the spreading disc 2, driven by a variable frequency motor, rotates and throws the fine calcium carbide slag powder towards its edge. The hot air passes between the air vanes in the air ring 13 and then contacts the edge of the spreading disc 2. The air ring 13 can adjust the air direction and speed using its tilted air vanes. Meanwhile, the screw feeder 4, driven by a geared motor, feeds the finely ground calcium carbide slag through its inlet end, and the powder falls into the spreading disc 2 from below its outlet end. In the central area, the feeding disc 2 is driven by a variable frequency motor. Through centrifugal force, the fine powder of carbide slag is thrown to the edge of the feeding disc 2. At this time, the fine powder flies out from the edge of the feeding disc 2 and comes into contact with the hot air. A portion of the fine powder is blown by the hot air to the air outlet 6 at the top of the cylinder 1. This portion is the dried finished product with a moisture content of less than 1%. Among them, the fine powder of carbide slag blown to the top of the cylinder 1 needs to pass through the air guide plate 7 on its way to the air outlet 6. The air guide plate 7 divides the airflow through multiple vertically arranged stationary blades, rectifying the hot air inside the cylinder 1, so that the airflow inside the dryer is uniform and stable. Another portion falls into the air inlet 11 through the gaps between the air blades in the air ring 13. The carbide slag falling into the air inlet 11 is blown by the hot air in the air inlet 11 and cleaned by the sweeping brush 12. After falling into the lower discharge pipe 15, it is conveyed out of the dryer. The airflow mixed with fine powder is sent out of the dryer from the top air outlet 6 after passing through the air guide plate 7. Another portion of the fine powder, due to high moisture content or excessively large particles, will fall into the feed cone 3 and then into the vertical feed pipe 8. By opening and closing the gate valve 10, this portion of fine powder can be controlled to enter the upper discharge pipe 9 or return to the spreading plate 2. This allows for precise control over the exit of the non-compliant carbide slag fine powder inside the cylinder. The carbide slag fine powder that has been sent out of the dryer is sent back to the preparation area for re-grinding or re-input into the dryer. This drying equipment is not only suitable for carbide slag but also for industrial wastes such as tailings or fly ash.

[0038] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A drying device for drying industrial waste, comprising a cylinder, wherein the cylinder is provided with a feed inlet and an air inlet, characterized in that: An air outlet is provided at the top of the cylinder. A material cone and a material spreading disc are provided inside the cylinder. The material cone is located in the upper part of the cylinder, and its bottom is connected to a vertical material pipe. The material spreading disc is located in the lower part of the cylinder. Several sweeping brushes are fixedly connected to the bottom edge of the material spreading disc, and a rotating device is connected to the center of the bottom of the material spreading disc. The inlet is provided between the material spreading disc and the vertical material pipe. An air inlet is provided along the circumference of the cylinder below the material spreading disc. A lower outlet pipe is provided at the bottom of the air inlet.

2. The drying equipment for drying industrial waste according to claim 1, characterized in that: An upper discharge pipe is provided on the vertical material pipe, and the upper discharge pipe extends obliquely downward from the upper part of the vertical material pipe out of the cylinder.

3. The drying equipment for drying industrial waste according to claim 1, characterized in that: A gate valve is also provided on the vertical material pipe, and the gate valve is located below the connection between the vertical material pipe and the upper discharge pipe.

4. A drying device for drying industrial waste according to claim 1, characterized in that: A screw feeder is installed at the feed inlet. The feed end of the screw feeder is placed outside the cylinder. The discharge end of the screw feeder is connected to the bottom of the vertical material pipe. The discharge end of the screw feeder is located at the center position above the spreading disc.

5. A drying device for drying industrial waste according to claim 1, characterized in that: An air ring is also fixedly installed circumferentially inside the cylinder. The air ring is located between the air inlet and the material spreading disc. The air ring consists of two annular air plates and multiple air vanes arranged between the two air plates, wherein the outer annular air plate is fixed inside the cylinder.

6. A drying device for drying industrial waste according to claim 1, characterized in that: A wear-resistant plate is also fixedly connected inside the cylinder. The wear-resistant plate is located above the spreading disc. The wear-resistant plate includes an upper wear-resistant plate and a lower wear-resistant plate. The top of the upper wear-resistant plate is arranged circumferentially along the inner wall of the cylinder. The upper wear-resistant plate is inclined downward towards the center of the cylinder. The bottom of the upper wear-resistant plate is connected to the top of the lower wear-resistant plate. The bottom of the lower wear-resistant plate is located on the inner wall of the cylinder or on the outside of the air ring.

7. A drying device for drying industrial waste according to claim 1, characterized in that: An explosion-proof valve is also provided at the top of the cylinder.

8. A drying device for drying industrial waste according to claim 1, characterized in that: The cylinder is also equipped with an air guide plate, which is fixedly installed on the top of the material cone.

9. A drying device for drying industrial waste according to claim 1, characterized in that: The spreading disc is circular with its edges curved upwards, and multiple curved baffles are evenly distributed on the circular surface of the spreading disc.

10. A drying device for drying industrial waste according to claim 9, characterized in that: The arc of the arc-shaped baffle is 0.89-0.91 degrees, and the arc of the edge of the spreading disc is 30 degrees.

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