Blast furnace slag waste heat recovery device

Abstract

The utility model relates to the technical field of blast furnace slag waste heat recovery, and particularly discloses a blast furnace slag waste heat recovery device which comprises a cylinder, a slag inlet and a slag outlet are formed in the two ends of the cylinder in the length direction in a staggered mode, a jacket is arranged outside the cylinder, and a cold medium inlet and a cold medium outlet are formed in the two ends of the jacket in the length direction in a staggered mode. A rotary drum is coaxially arranged in the cylinder, the two axial ends of the rotary drum extend out of the cylinder, the two axial ends of the cylinder are rotationally connected with the rotary drum through sealing pieces respectively, the two axial ends of the rotary drum are connected with a water inlet pipe and a water outlet pipe through rotary joints respectively, and auger blades are connected to the outer wall of the rotary drum in the cylinder. The outer edge of the auger blade is in clearance fit with the inner wall of the cylinder, a power device for driving the rotary drum to rotate is arranged outside the cylinder, the heat exchange rate of blast furnace slag can be effectively improved, and the operation energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace slag waste heat recovery, in particular to a blast furnace slag waste heat recovery device. Background Art

[0002] In the prior art, waste heat is generally recovered from blast furnace slag by a slag cooler. The structure of the slag cooler can be referred to the patent document with publication number CN21999215U. Although the slag cooler is already widely used, there are still areas for improvement. First, when the slag cooler is in operation, it is necessary to use a motor to drive the entire drum to rotate, which consumes a lot of electricity; second, the slag cooler only sets a water interlayer between the inner wall and the outer wall of the drum, and the heat exchange rate is not high enough. Utility Model Content

[0003] In order to solve the problems mentioned in the background technology, the purpose of the utility model is to provide a blast furnace slag waste heat recovery device.

[0004] In order to achieve the above objectives, the technical solution of the utility model is:

[0005] A blast furnace slag waste heat recovery device comprises a cylinder, wherein slag inlets and slag outlets are staggered at two ends in the length direction of the cylinder, a jacket is provided on the outside of the cylinder, and a cold medium inlet and a cold medium outlet are staggered at two ends in the length direction of the jacket, a rotating drum is coaxially arranged inside the cylinder, and both axial ends of the rotating drum extend outside the cylinder, and the axial ends of the cylinder are rotatably connected to the rotating drum through sealing members, and the axial ends of the rotating drum are connected to a water inlet pipe and a drain pipe through rotating joints, and a Jiaolong blade is connected to the outer wall of the rotating drum in the cylinder, and the outer edge of the Jiaolong blade is gap-matched with the inner wall of the cylinder, and a power device for driving the rotating drum to rotate is provided on the outside of the cylinder.

[0006] Furthermore, the power device includes a motor, a driving gear and a driven gear, the driven gear is fixedly sleeved on the rotating drum, the driving gear is fixedly connected to the main shaft of the motor, the driving gear is meshed with the driven gear, and the motor is relatively fixed to the drum.

[0007] The beneficial effects of the utility model are as follows: when in use, blast-furnace slag is input into the cylinder from the slag inlet, and under the action of the rotating drum and the dragon blades, the blast-furnace slag is conveyed to the slag discharge port for discharge. During the blast-furnace slag conveying process, water is respectively conveyed into the rotating drum and the jacket, thereby realizing heat exchange with the blast-furnace slag. Since heat exchange can be achieved on both the inner and outer sides, the heat exchange rate of the blast-furnace slag is effectively improved, and only the rotating drum needs to be driven to rotate. Compared with the traditional slag cooler, it can effectively save energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Explanation of the accompanying figures: 1. Cylinder, 11. Slag inlet, 12. Slag discharge outlet, 13. Jacket, 14. Cold medium inlet, 15. Cold medium discharge outlet, 2. Rotating drum, 21. Jiaolong blade, 3. Seal, 4. Rotary joint, 5. Water inlet pipe, 6. Drain pipe, 7. Motor, 71. Driving gear, 8. Driven gear, 9. Bracket, 10. Machine base. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the utility model.

[0011] like Figure 1 As shown, a blast furnace slag waste heat recovery device comprises a cylinder 1, which is horizontally mounted on the ground through a bracket 9, and a slag inlet 11 and a slag discharge port 12 are staggeredly arranged at both ends of the length direction of the circumference of the cylinder 1, wherein the slag inlet 11 faces upward and the slag discharge port 12 faces downward, and a jacket 13 is arranged on the outside of the cylinder 1, and a cold medium inlet 14 and a cold medium discharge port 15 are staggeredly arranged at both ends of the length direction of the circumference of the jacket 13, wherein the cold medium inlet 14 faces downward and the cold medium discharge port 15 faces upward, and a rotating drum 2 is coaxially arranged in the cylinder 1, and both ends of the rotating drum 2 in the axial direction extend outside the cylinder 1, and the two ends of the axial direction of the cylinder 1 are divided into The drum 2 is rotatably connected to the drum 2 through a seal 3, and the two axial ends of the drum 2 are respectively connected to the water inlet pipe 5 and the drain pipe 6 through a rotary joint 4. The outer wall of the drum 2 in the cylinder 1 is connected with a dragon blade 21, and the outer edge of the dragon blade 21 is clearance-matched with the inner wall of the cylinder 1. The outside of the cylinder 1 is provided with a power device for driving the drum 2 to rotate. Preferably, the power device includes a motor 7, a driving gear 71 and a driven gear 8. The driven gear 8 is fixedly sleeved on the drum 2, the driving gear 71 is fixedly connected to the main shaft of the motor 7, the driving gear 71 is meshed with the driven gear 8, and the motor 7 is fixed to the ground through a base 10.

[0012] In actual use, blast-furnace slag is input into the cylinder 1 through the slag inlet 11, and is transported to the slag outlet 12 for discharge under the action of the rotating drum 2 and the dragon blades 21. During the blast-furnace slag transfer process, water is respectively supplied to the rotating drum 2 and the jacket 13 to achieve heat exchange with the blast-furnace slag. Since heat exchange can be achieved on both the inside and the outside, the heat exchange rate of the blast-furnace slag is effectively improved, and only the rotating drum 2 needs to be driven to rotate. Compared with the traditional slag cooler, it can effectively save energy consumption.

[0013] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blast furnace slag waste heat recovery device, comprising a cylinder (1), wherein two ends of the cylinder (1) in the length direction are staggeredly provided with a slag inlet (11) and a slag outlet (12), characterized in that: The cylinder (1) is provided with a jacket (13) on the outside, and cold medium inlet (14) and cold medium outlet (15) are staggered at both ends of the length direction of the jacket (13). A rotating drum (2) is coaxially arranged inside the cylinder (1), and both axial ends of the rotating drum (2) extend outside the cylinder (1). The axial ends of the cylinder (1) are rotatably connected to the rotating drum (2) via sealing members (3), and the axial ends of the rotating drum (2) are connected to a water inlet pipe (5) and a water discharge pipe (6) via a rotary joint (4). A dragon blade (21) is connected to the outer wall of the rotating drum (2) inside the cylinder (1), and the outer edge of the dragon blade (21) is clearance-matched with the inner wall of the cylinder (1). A power device for driving the rotating drum (2) to rotate is provided on the outside of the cylinder (1).

2. A blast furnace slag waste heat recovery device according to claim 1, characterized in that: The power device comprises a motor (7), a driving gear (71) and a driven gear (8); the driven gear (8) is fixedly sleeved on the rotating drum (2); the driving gear (71) is fixedly connected to the main shaft of the motor (7); the driving gear (71) is meshed with the driven gear (8); and the motor (7) and the drum (1) are relatively fixed.

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