A continuous feeding and conveying equipment for electric furnace steelmaking

Abstract

The utility model relates to the technical field of waste heat utilization, and discloses a continuous feeding and conveying equipment for electric furnace steelmaking, including a scrap steel feeding section, wherein the scrap steel feeding section is connected to a feeding and conveying mechanism through a feeding and transferring machine, and an insulation cover is arranged at the upper end of the feeding and conveying mechanism along its conveying direction, and the insulation cover is connected to the electric arc furnace through a smoke exhaust pipe, and a filter cylinder is arranged at the top of the insulation cover, and a filter screen cylinder is arranged inside the filter cylinder, and the top side wall of the filter screen cylinder is in close contact with the inner wall of the filter cylinder; a rotating sleeve is rotatably arranged on the filter cylinder, and a high-temperature resistant cleaning brush is arranged on the rotating sleeve, and the cleaning brush is in contact with the outer wall of the filter screen cylinder in the initial state. The utility model can filter the high-temperature flue gas entering the insulation cover, reduce the scouring and wear caused to the insulation cover and the feeding and conveying mechanism, ensure the normal operation of the equipment, and provide guarantee for the work efficiency and service life of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to continuous feeding and conveying equipment for electric furnace steelmaking. Background Art

[0002] The emergence of scrap steel preheating technology and equipment has largely solved the needs of the steel industry for energy conservation, consumption reduction, quality improvement and efficiency enhancement. However, the currently widely used horizontal preheating process for scrap steel still has certain shortcomings. During operation, the high-temperature flue gas is directly transported to the insulation hood to contact the scrap steel for heat exchange and transfer. Since the flue gas carries a large amount of dust and impurities, it directly enters the insulation hood, which not only causes great erosion and wear on the inner wall of the insulation hood, but also has a great adverse effect on the parts of the feeding and conveying mechanism of the material conveying. In the long run, it will affect the normal operation of the equipment, resulting in frequent shutdowns for maintenance, resulting in reduced work efficiency and increased production costs. At the same time, it will also shorten the service life of the insulation hood and the feeding and conveying mechanism. Utility Model Content

[0003] The purpose of the utility model is to provide a continuous feeding and conveying equipment for electric furnace steelmaking, which can filter the high-temperature flue gas entering the insulation cover, reduce the erosion and wear of the insulation cover and the feeding and conveying mechanism, ensure the normal operation of the equipment, and provide protection for the work efficiency and service life of the equipment.

[0004] The utility model adopts the following technical solutions:

[0005] A continuous feeding and conveying equipment for electric furnace steelmaking, comprising a scrap steel feeding section, the scrap steel feeding section is connected to a feeding and conveying mechanism through a feeding and transferring machine, and the output end of the feeding and conveying mechanism is located at the entrance of the electric arc furnace; an insulation cover is arranged on the upper end of the feeding and conveying mechanism along its conveying direction, the end of the insulation cover away from the feeding and transferring machine is connected to the electric arc furnace through a smoke exhaust pipe, the end of the insulation cover away from the electric arc furnace is provided with a discharge pipe, a filter cylinder is arranged on the top of the insulation cover, the filter cylinder is connected with the smoke exhaust pipe, a filter screen cylinder is coaxially arranged inside the filter cylinder, wherein the top end of the filter screen cylinder is open, and the top side wall of the filter screen cylinder is tightly abutted against the inner wall of the filter cylinder; a rotating sleeve is rotatably arranged on the filter cylinder, and a high temperature resistant cleaning brush is arranged on the rotating sleeve, and the cleaning brush is in contact with the outer wall of the filter screen cylinder in an initial state.

[0006] Preferably, a driving gear ring is arranged outside the rotating sleeve, a supporting frame is arranged on the filter cylinder, a driving motor is arranged on the supporting frame, and a driving gear meshing with the driving gear ring is arranged on the rotating shaft of the driving motor.

[0007] Preferably, the diameter of the filter screen cylinder is smaller than the inner diameter of the filter cylinder body, a fixing ring is provided at the top of the filter screen cylinder, a supporting ridge is provided on the inner wall of the filter screen cylinder, and the fixing ring is detachably connected to the supporting ridge.

[0008] Preferably, a notch is provided on one side of the bottom of the filter screen cylinder, and a receiving box is movably provided in the notch; a dust cleaning door panel is hinged on the outer wall of the filter cylinder, and the receiving box is connected to the inner wall of the dust cleaning door panel.

[0009] Preferably, the interior of the receiving box is a funnel-shaped structure, and a sealing cover is provided at the bottom.

[0010] Preferably, a conical flow guide portion is provided in the middle of the filter screen cylinder, and the maximum size of the bottom end of the conical flow guide portion is smaller than the inner diameter of the filter screen cylinder.

[0011] Preferably, a U-shaped pipe connected to the filter screen cylinder is arranged inside the heat preservation cover, and smoke guiding pipes are arranged at both upper and lower ends of the U-shaped pipe, and smoke exhaust ports are provided on the opposite end surfaces of the upper and lower smoke guiding pipes; the upper smoke guiding pipe is located at the top of the heat preservation cover, and the lower smoke guiding pipe is located below the feeding and conveying mechanism; the feeding and conveying mechanism is a mesh belt conveyor.

[0012] Preferably, the smoke exhaust port is opened along the length direction of the smoke guiding pipe, and a flow guide cover is arranged thereon.

[0013] Preferably, discharge ports are provided at both upper and lower ends of the U-shaped pipe, and the smoke guide pipe is connected to the U-shaped pipe through the discharge ports, wherein the discharge port located at the top is smaller than the discharge port located at the bottom.

[0014] Compared with the prior art, the utility model has the following beneficial effects: by setting a filter screen cylinder in the filter barrel body on the heat preservation cover, the filter screen cylinder can be used to filter the smoke entering the heat preservation cover, and the dust entrained in the smoke can be intercepted, thereby avoiding the scouring and wear of the heat preservation cover and the feeding and conveying mechanism by the dust, ensuring the normal operation of the equipment, and providing guarantee for the work efficiency and service life of the equipment. The setting of the rotating sleeve on the filter barrel body can utilize the rotation of the rotating sleeve to drive the rotation of the cleaning brush set therein, so as to clean the surface of the filter screen cylinder, avoid dust blocking the mesh of the filter screen cylinder, and ensure the flow rate of the smoke, with a simple structure and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the structure of the heat preservation cover and the filter cylinder of the embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the structure of the filter screen cartridge according to an embodiment of the present application;

[0018] Figure 4 This is a schematic diagram of the structure of the receiving box according to an embodiment of the present application;

[0019] Figure 5 This is a schematic diagram of the structure of the smoke guide duct and the U-shaped duct implemented in this application. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings and embodiments:

[0021] like Figures 1 to 5 As shown, the utility model discloses an electric furnace steelmaking continuous feeding and conveying equipment, comprising a scrap steel feeding section 1, wherein the scrap steel feeding section 1 is connected to a feeding and conveying mechanism 3 through a feeding and conveying machine 2, and the output end of the feeding and conveying mechanism 3 is located at the entrance of the electric arc furnace 4, so that along with the feeding and conveying mechanism 3, the material is continuously conveyed to the electric arc furnace 4 for smelting; an insulation cover 5 is arranged on the upper end of the feeding and conveying mechanism 3 along its conveying direction, and the insulation cover 5 seals and insulates the feeding and conveying mechanism 3, and the end of the insulation cover 5 away from the feeding and conveying machine 2 is connected to the electric arc furnace 4 through a smoke exhaust pipe 6, and the high-temperature flue gas generated by the scrap steel smelting in the electric arc furnace 4 enters the insulation cover 5 through the smoke exhaust pipe 6 and contacts with the scrap steel to transfer heat, thereby reducing the energy consumption in the subsequent smelting process; the end of the insulation cover 5 away from the electric arc furnace 4 is provided with an exhaust Pipe 7, the discharge pipe 7 is arranged at the top of the heat preservation cover 5, and is used to discharge the flue gas after heat exchange from the heat preservation cover 5; a filter cylinder 8 is arranged at the top of the heat preservation cover 5, and the filter cylinder 8 is conductively connected with the smoke exhaust pipe 6, and a filter screen cylinder 9 is coaxially arranged inside the filter cylinder 8, wherein the top of the filter screen cylinder 9 is open, and the top side wall of the filter screen cylinder 9 is tightly abutted against the inner wall of the filter cylinder 8, so that the flue gas enters the filter screen cylinder 9 and is filtered and then discharged from the outer wall of the filter screen cylinder 9; a rotating sleeve 10 is rotatably arranged on the filter cylinder 8, and a high temperature resistant cleaning brush 11 is arranged on the rotating sleeve 10. In the initial state, the cleaning brush 11 contacts the outer wall of the filter screen cylinder 9, so that as the rotating sleeve 10 rotates, the outer arm of the filter screen cylinder 9 is cleaned to avoid dust accumulation on the inner wall of the filter screen cylinder 9 affecting the subsequent flue gas filtering efficiency.

[0022] The rotating sleeve 10 can be rotatably arranged in the middle of the filter cylinder 8, and the upper and lower ends are rotatably connected to the filter cylinder 8 through a swivel bearing; the rotating sleeve 10 can also be directly rotatably arranged at the top of the filter cylinder 8, and the top of the rotating sleeve 10 is rotatably connected to the smoke exhaust pipe 6 above through a swivel bearing, as long as the normal rotation of the rotating sleeve 10 can be guaranteed; the matching selection is made according to actual needs. Specifically, in this embodiment, a driving gear ring 12 is arranged on the outside of the rotating sleeve 10, a support frame 13 is arranged on the filter cylinder 8, a driving motor 14 is fixedly arranged on the support frame 13, and a driving gear 15 meshing with the driving gear ring 12 is arranged on the rotating shaft of the driving motor 14. Through the rotation of the driving motor 14, the driving gear 15 is driven to mesh with the driving gear ring 12 to rotate, thereby realizing the cleaning operation of the cleaning brush 11 on the outer wall of the filter cylinder 9. Among them, in this embodiment, the filter cylinder 8 and the rotating sleeve 10 are both provided with a heat insulation layer on the outside or inside, which can prevent heat loss and avoid the adverse effects of high temperature on external circuit components.

[0023] Furthermore, the diameter of the filter screen cylinder 9 is smaller than the inner diameter of the filter cylinder body 8, which can provide a flow space for the filtered smoke. A fixing ring 17 is provided at the top of the filter screen cylinder 9, and a supporting convex edge 16 is provided on the inner wall of the filter screen cylinder 9. The supporting convex edge 16 matches the fixing ring 17, and the fixing ring 17 and the supporting convex edge 16 are detachably connected by bolts. In addition, a notch 18 is provided on one side of the bottom of the filter screen cylinder 9, and a receiving box 19 is movably provided in the notch 18; a dust cleaning door plate 20 is hinged on the outer wall of the filter cylinder body 8, and the receiving box 19 is connected to the inner wall of the dust cleaning door plate 20; the receiving box 19 is used to receive the dust cleaned from the filter screen cylinder 9 for subsequent centralized cleaning; because the receiving box 19 is hingedly provided with the dust cleaning door plate 20, when the rotating dust cleaning door plate 20 is opened, the receiving box 19 can be taken out, which is convenient for centralized dust cleaning operation; preferably, the receiving box 19 is funnel-shaped inside, and a sealing cover is provided at the bottom thereof for smooth discharge of dust.

[0024] Furthermore, a conical guide portion is preferably provided in the middle of the filter mesh cylinder 9, and the maximum size of the bottom end of the conical guide portion is smaller than the inner diameter of the filter mesh cylinder 9. The guide portion is arranged in the middle of the filter mesh cylinder 9 through support rods arranged at intervals. The conical guide portion can provide guidance for the smoke, so that the smoke is dispersed to the surroundings and filtered and discharged in an orderly manner, avoiding the impact of the smoke directly flowing downward on the bottom receiving box 19.

[0025] Furthermore, a U-shaped pipe 21 connected to the filter screen cylinder 9 is provided inside the heat preservation cover 5, and a smoke guide pipe 22 is provided at both the upper and lower ends of the U-shaped pipe 21. Specifically, discharge ports are provided at both the upper and lower ends of the U-shaped pipe 21, and the smoke guide pipe 22 is connected to the U-shaped pipe 21 through the discharge ports. Since the upper smoke guide pipe 22 is closer to the smoke outlet of the filter screen cylinder 9, the discharge port located at the upper end is smaller than the discharge port located at the lower end, so as to reduce the deviation of the smoke flow in the upper and lower smoke guide pipes 22 as much as possible, so as to ensure that the scrap steel is discharged. The upper and lower smoke guide pipes 22 are provided with smoke exhaust ports on their opposite end faces, and the upper smoke guide pipe 22 is located at the top of the heat preservation cover 5, and the lower smoke guide pipe 22 is located below the feeding and conveying mechanism 3; the feeding and conveying mechanism 3 is a mesh belt conveyor, so that the smoke can be transferred to the bottom of the scrap steel through the mesh of the mesh belt, and cooperate with the smoke discharged from the upper smoke guide pipe 22 to achieve heat transfer on both sides of the scrap steel, realize the heavy utilization of heat, and improve the preheating effect of the scrap steel. Preferably, multiple smoke exhaust ports are opened along the length direction of the smoke guide pipe 22, and each smoke guide pipe 22 is provided with a guide cover 23, so as to guide the smoke to the surface of the scrap steel in an orderly manner.

[0026] When the utility model is in use, high-temperature flue gas enters the filter screen cylinder 9 through the smoke exhaust pipe 6, and then enters the U-shaped pipe 21 after being filtered, and is diverted by the U-shaped pipe 21 and discharged from the upper and lower smoke guide pipes 22 to the surface of the scrap steel for heat transfer; when working, the drive motor 14 can be started regularly to drive the rotating sleeve 10 to rotate, driving the cleaning brush 11 to clean the outer wall of the filter screen cylinder 9, and finally the cleaning door panel 20 can be opened regularly to take out the dust collected in the receiving box 19. The utility model has a simple structure, is easy to operate, and has strong practicality.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A continuous feeding and conveying equipment for electric furnace steelmaking, comprising a scrap steel feeding section, wherein the scrap steel feeding section is connected to a feeding and conveying mechanism via a feeding and conveying machine, wherein the output end of the feeding and conveying mechanism is located at the entrance of an electric arc furnace; an insulation cover is arranged at the upper end of the feeding and conveying mechanism along its conveying direction, wherein an end of the insulation cover away from the feeding and conveying machine is connected to the electric arc furnace via a smoke exhaust pipe, and an exhaust pipe is arranged at an end of the insulation cover away from the electric arc furnace, wherein the insulation cover is characterized in that: A filter cylinder is arranged at the top of the heat preservation cover, and the filter cylinder is conductively connected with the smoke exhaust pipe, and a filter mesh cylinder is coaxially arranged inside the filter cylinder, wherein the top of the filter mesh cylinder is open, and the top side wall of the filter mesh cylinder is tightly abutted against the inner wall of the filter cylinder; a rotating sleeve is rotatably arranged on the filter cylinder, and a high-temperature resistant cleaning brush is arranged on the rotating sleeve, and the cleaning brush is in contact with the outer wall of the filter mesh cylinder in an initial state.

2. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 1 is characterized in that: The rotating sleeve is provided with a driving gear ring on the outside, the filter cylinder is provided with a support frame, the support frame is provided with a driving motor, and the rotating shaft of the driving motor is provided with a driving gear meshing with the driving gear ring.

3. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 1 is characterized in that: The diameter of the filter screen cylinder is smaller than the inner diameter of the filter cylinder body. A fixing ring is arranged at the top of the filter screen cylinder. A supporting convex edge is arranged on the inner wall of the filter screen cylinder. The fixing ring is detachably connected to the supporting convex edge.

4. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 1 is characterized in that: A notch is provided on one side of the bottom of the filter screen cylinder, and a receiving box is movably provided in the notch; a dust cleaning door panel is hinged on the outer wall of the filter cylinder, and the receiving box is connected to the inner wall of the dust cleaning door panel.

5. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 4 is characterized in that: The interior of the receiving box is a funnel-shaped structure, and a sealing cover is arranged at the bottom.

6. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 5 is characterized in that: A conical flow guide portion is arranged in the middle of the filter screen cylinder, and the maximum size of the bottom end of the conical flow guide portion is smaller than the inner diameter of the filter screen cylinder.

7. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 1 is characterized in that: A U-shaped pipe connected to the filter cylinder is arranged inside the heat preservation cover, and smoke guide pipes are arranged at the upper and lower ends of the U-shaped pipe, and smoke exhaust ports are opened on the opposite end surfaces of the upper and lower smoke guide pipes; the upper smoke guide pipe is located at the top of the heat preservation cover, and the lower smoke guide pipe is located below the feeding and conveying mechanism; the feeding and conveying mechanism is a mesh belt conveyor.

8. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 7 is characterized in that: The smoke exhaust port is opened along the length direction of the smoke guide pipe, and a flow guide cover is arranged on the smoke exhaust port.

9. The continuous feeding and conveying equipment for electric furnace steelmaking according to claim 7, characterized in that: The U-shaped pipe is provided with discharge ports at both upper and lower ends, and the smoke guide pipe is connected with the U-shaped pipe through the discharge ports, wherein the discharge port located at the top is smaller than the discharge port located at the bottom.

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