A pelletizing ore vertical furnace body discharge pipe

Abstract

The present application relates to a pelletizing ore vertical furnace body discharge pipe, belonging to the technical field of discharge pipes, comprising a rectangular discharge pipe body; a plurality of upwardly inclined receiving plates are arranged on the inner wall of the discharge pipe body. The present application has the effect of increasing the service life of the discharge pipe.

Description

Technical Field

[0001] The present application relates to the field of discharge pipes, and in particular to a discharge pipe for a pelletizing shaft furnace. Background Art

[0002] The discharge pipe of the pelletizing shaft furnace is an important part of the shaft furnace system. It is responsible for discharging the roasted pellets from the furnace bottom continuously and stably. The general discharge pipe of the pelletizing shaft furnace is designed as a circular tube, welded with steel plate surrounding pipe, and the discharge is stable.

[0003] During unloading, the inner side of the unloading pipe is in direct contact with the finished pellets. However, since the pellets are discharged directly from the bottom of the furnace, the temperature of the pellets directly out of the furnace is maintained between 600-800°C for a long time. The high-temperature pellets are eroded and rubbed against the inner side of the unloading pipe for a long time, causing the inside of the unloading pipe to wear faster, thereby reducing the service life of the unloading pipe. Utility Model Content

[0004] In order to increase the service life of a discharge pipe, the present application provides a discharge pipe for a pelletizing vertical furnace.

[0005] The present application provides a pelletizing ore vertical furnace body discharge pipe adopting the following technical solution:

[0006] A pelletizing ore vertical furnace furnace body discharge pipe, comprising a rectangular discharge pipe body;

[0007] A plurality of upwardly inclined material receiving plates are arranged on the inner wall of the discharge pipe body.

[0008] By adopting the above technical solution, an angle is formed between the receiving plate and the discharge pipe body, and a part of the pellets entering the discharge pipe body will enter the formed angle, and the pellets that have not entered the angle will contact the receiving plate and the pellets entering the angle, that is, the pellets rub against the receiving plate and the pellets instead of rubbing against the discharge pipe body, thereby reducing the wear on the discharge pipe and thereby increasing the service life of the discharge pipe.

[0009] Optionally, the material receiving plate includes a first material receiving plate and a second material receiving plate that are hinged, a torsion spring is arranged between the first material receiving plate and the second material receiving plate to provide power for the rotation of the second material receiving plate, the end of the first material receiving plate away from the second material receiving plate is fixedly connected to the inner wall of the discharge pipe body, one spring arm of the torsion spring is installed on the side of the first material receiving plate close to the ground, and the other spring arm of the torsion spring is installed on the side of the second material receiving plate close to the ground, and a limit block is installed on the first material receiving plate to limit the rotation range of the second material receiving plate.

[0010] By adopting the above technical solution, the pellets enter the discharge pipe body and hit the second receiving plate, and the second receiving plate rotates downward. When the pellets are no longer in contact with the second receiving plate, the second receiving plate rotates upward under the power provided by the torsion spring. The limit block limits the rotation range of the second receiving plate so that the side of the second receiving plate away from the ground is on the same horizontal plane as the side of the first receiving plate away from the ground. When the impact occurs, the second receiving plate rotates downward, which can reduce the impact force of the pellets on it, thereby reducing the wear on the receiving plate.

[0011] Optionally, a rubber pad is installed on the side of the limit block close to the ground.

[0012] By adopting the above technical solution, when the second material receiving plate rotates upward until it abuts the limit block, the torsion spring provides it with greater kinetic energy, and the second material receiving plate is prone to greater collision with the limit block, generating greater noise and being easily damaged. The rubber pad is used for buffering, reducing the generation of noise and reducing damage to the second material receiving plate and the limit block.

[0013] Optionally, a water cooling pipe is sheathed on the outside of the discharge pipe body, and a closed cavity is formed between the inner wall of the water cooling pipe and the outer wall of the discharge pipe body. Both ends of the water cooling pipe are fixedly connected to the outer wall of the discharge pipe body. A water supply pipe is connected to the side wall of the water cooling pipe at one end close to the ground, and a water outlet pipe is connected to the side wall of the water cooling pipe at one end away from the ground.

[0014] By adopting the above technical solution, cold water is passed into the water cooling pipe to cool the discharge pipe body, thereby reducing the temperature of the discharge pipe body and increasing the service life of the discharge pipe body.

[0015] Optionally, a water cooling device is further included, wherein one end of the water supply pipe away from the water cooling pipe is connected to the water cooling device, and one end of the water outlet pipe away from the water cooling pipe is connected to the water cooling device.

[0016] By adopting the above technical solution, the water used for cooling flows out of the water cooling device and enters the water cooling pipe, and the water in the water cooling pipe used for cooling enters the water cooling device again. The addition of the water cooling device allows the water to be recycled, reducing the waste of water resources.

[0017] Optionally, a water supply pump is installed on the water supply pipe, and a water pump is installed on the water outlet pipe.

[0018] By adopting the above technical solution, the two water pumps can increase the circulation speed of water, thereby improving the cooling effect.

[0019] Optionally, an air diffusion hole is provided at one end of the water cooling pipe away from the ground, a water receiving trough is provided below the air diffusion hole, and the water receiving trough is installed on the water cooling pipe.

[0020] By adopting the above technical solution, high temperature will cause the water in the water-cooling pipe to evaporate and generate water vapor. The generated water vapor is dispersed from the air diffusion holes, and continues to liquefy after being cooled by external cold air. The liquefied water vapor flows into the water receiving tank, so that the water vapor can be discharged normally, and the liquefied water vapor will not flow into other equipment, thereby improving the convenience of use.

[0021] Optionally, a dustproof plate is provided above the air diffusion holes, and the dustproof plate is installed on the water cooling pipe.

[0022] By adopting the above technical solution, the dust-proof plate blocks the flying dust at the entrance of the discharge pipe body, thereby reducing the possibility of the air diffusion holes being blocked.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. An angle is formed between the receiving plate and the discharge pipe body. Part of the pellets that enter the discharge pipe body will enter the formed angle, and the pellets that do not enter the angle will contact the receiving plate and the pellets that enter the angle, that is, the pellets rub against the receiving plate and the pellets instead of the discharge pipe body, thereby reducing the wear on the discharge pipe and thereby increasing the service life of the discharge pipe;

[0025] 2. After the pellets enter the discharge pipe body, they hit the second receiving plate, and the second receiving plate rotates downward. When the pellets are no longer in contact with the second receiving plate, the second receiving plate rotates upward under the power provided by the torsion spring, and the limit block limits the rotation range of the second receiving plate, so that the side of the second receiving plate away from the ground is on the same horizontal plane as the side of the first receiving plate away from the ground. When the impact occurs, the second receiving plate rotates downward, which can reduce the impact force of the pellets on it, thereby reducing the wear on the receiving plate;

[0026] 3. Cold water is passed into the water cooling pipe to cool the discharge pipe body, thereby reducing the temperature of the discharge pipe body and increasing the service life of the discharge pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the discharge pipe and water cooling of the pelletizing vertical furnace in the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the discharge pipe of the pelletizing vertical furnace in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of the material receiving plate in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the structure of the rubber pad in the embodiment of the present application.

[0031] Explanation of the reference numerals: 1. discharge pipe body; 2. receiving plate; 21. first receiving plate; 22. second receiving plate; 23. limit block; 24. rubber pad; 3. torsion spring; 4. water cooling pipe; 41. water supply pipe; 42. water outlet pipe; 43. water supply pump; 44. water pump; 45. air diffusion hole; 5. water cooling device; 6. water receiving trough; 7. dustproof plate. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a pelletizing ore vertical furnace body discharge pipe. Figure 1 and Figure 2 The discharge pipe of the pelletizing ore vertical furnace comprises a discharge pipe body 1 and a receiving plate 2 installed inside the discharge pipe body 1. The discharge pipe body 1 is a hollow pipe in a rectangular or cubic shape.

[0034] Reference Figure 2 and Figure 3 , a plurality of upwardly inclined receiving plates 2 are installed on the four inner walls of the discharge pipe body 1, which can be welded specifically, and an angle is formed between the receiving plates 2 and the inner wall of the discharge pipe body 1 to store a certain number of pellets. The degree of the angle is generally set to 45°, and the receiving plates 2 are metal plates, which are installed on the inner wall of the discharge pipe body 1 at equal intervals. Generally, the size of the receiving plates 2 is a square plate of 100mm*100mm, and the spacing between each receiving plate 2 is set to 100mm. The degree of the angle, the size of the receiving plates 2, and the spacing between the receiving plates 2 can be adjusted according to the actual diameter of the pellets, and are not specifically limited here.

[0035] Reference Figure 3 and Figure 4In order to improve the service life of the receiving plate 2, the receiving plate 2 is divided into two parts, namely a first receiving plate 21 fixedly connected to the inner wall of the discharge pipe body 1, and a second receiving plate 22 frequently in contact with the pelletized ore. The first receiving plate 21 and the second receiving plate 22 are connected in a hinged manner, and a torsion spring 3 is arranged at the hinged position. The torsion spring 3 is located on the side of the first receiving plate 21 and the second receiving plate 22 close to the ground. The torsion spring 3 provides the second receiving plate 22 with power to rotate away from the ground. One of the spring arms of the torsion spring 3 is installed on the first receiving plate 21, and the other spring arm of the torsion spring 3 is installed on the second receiving plate 22. Specifically, the connection can be made by abutting or welding. A limiting block 23 is provided on the side of the first receiving plate 21 away from the ground, and the limiting block 23 limits the second receiving plate 22 to prevent the second receiving plate 22 from excessive rotation. When in use, the pellets hit the second receiving plate 22, and the second receiving plate 22 rotates downward, and then rotates upward under the action of the torsion spring 3. The limiting block 23 limits the second receiving plate 22, so that the side of the second receiving plate 22 away from the ground is on the same horizontal plane as the side of the first receiving plate 21 away from the ground. A rubber pad 24 is provided on the side of the limiting block 23 that contacts the second receiving plate 22, which is used to reduce the vibration and noise generated when the second receiving plate 22 contacts the limiting block 23.

[0036] Reference Figure 1 A water cooling pipe 4 is sleeved on the outside of the discharge pipe body 1. Both ends of the water cooling pipe 4 are fixedly connected to the outer wall of the discharge pipe body 1, so that a closed cavity is formed between the inner wall of the water cooling pipe 4 and the outer wall of the discharge pipe body 1. A water supply pipe 41 is connected to the side wall of the end of the water cooling pipe 4 close to the ground, and a water supply pipe 41 is connected to the side wall of the end of the water cooling pipe 4 away from the ground. External water enters the water cooling pipe 4 through the water supply pipe 41, and the water in the water cooling pipe 4 is discharged from the water cooling pipe 4 through the water outlet pipe 42. The ends of the water supply pipe 41 and the water outlet pipe 42 that are not connected to the water cooling pipe 4 are both connected to a water cooling device 5. The water cooling device 5 is used to cool the hot water discharged from the water outlet pipe 42, and at the same time, the cooled cold water is supplied to the water cooling pipe 4, so as to recycle the water. In order to speed up the circulation of water, a water supply pump 43 is installed on the water supply pipe 41, and a water pump 44 is installed on the water outlet pipe 42.

[0037] Reference Figure 1Since the temperature of the pelletized material is too high, when it passes through the discharge pipe body 1, the temperature of the discharge pipe body 1 will also increase, thereby causing a certain amount of evaporation of the water in the water-cooling pipe 4. If the generated water vapor is not processed, a large amount of gas will expand in the cavity, thereby causing water leakage at the welding point. Therefore, an air diffusion hole 45 is opened at the end of the water-cooling pipe 4 away from the ground, so that the water vapor is discharged from the air diffusion hole 45, and the water vapor will be liquefied after being discharged. A water receiving trough 6 connected to the water cooling pipe 4 is provided below the air diffusion hole 45, and the liquefied water vapor falls into the water receiving trough 6. The water receiving trough 6 is connected to the water cooling device 5 according to actual needs, or is connected to other devices for water recovery, so that it will not affect other equipment below the discharge pipe body 1.

[0038] At the same time, refer to Figure 1 Flying dust is easy to exist at the feed inlet of the discharge pipe body 1. The flying dust will condense when it meets water, and it is easy to cause blockage at the air diffusion hole 45. Therefore, a dustproof plate 7 connected to the water cooling pipe 4 is arranged above the air diffusion hole 45 to ensure the normal use of the air diffusion hole 45.

[0039] The implementation principle of a pelletizing ore vertical furnace discharge pipe in an embodiment of the present application is as follows: the pellets enter the discharge pipe body 1 and hit the second receiving plate 22. The second receiving plate 22 rotates downward after contacting the pellets, and part of the pellets are stuck between the first receiving plate 21 and the inner wall of the discharge pipe body 1. When the pellets are discharged again, the pellets collide with the second receiving plate 22, the first collecting plate and the stuck pellets. When the pellets stop entering, the second receiving plate 22 returns to the restricted position of the limit block 23 under the action of the torsion spring 3. After the water of the water cooling device 5 enters the water cooling pipe 4 through the water supply pump 43 and the water supply pipe 41, it flows back to the water cooling device 5 through the water pump 44 and the water outlet pipe 42. The water cooling device 5 cools the returned water.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pelletizing shaft furnace body discharge pipe, characterized in that: It comprises a rectangular discharge pipe body (1); A plurality of upwardly inclined receiving plates (2) are provided on the inner wall of the discharge pipe body (1); The material receiving plate (2) comprises a first material receiving plate (21) and a second material receiving plate (22) which are hinged, a torsion spring (3) for providing power for the second material receiving plate (22) to rotate is arranged between the first material receiving plate (21) and the second material receiving plate (22), one end of the first material receiving plate (21) away from the second material receiving plate (22) is fixedly connected to the inner wall of the discharge pipe body (1), one spring arm of the torsion spring (3) is installed on the side of the first material receiving plate (21) close to the ground, and the other spring arm of the torsion spring (3) is installed on the side of the second material receiving plate (22) close to the ground, and a limit block (23) for limiting the rotation range of the second material receiving plate (22) is installed on the first material receiving plate (21).

2. The pelletizing shaft furnace discharge pipe according to claim 1, characterized in that: A rubber pad (24) is installed on the side of the limit block (23) close to the ground.

3. The pelletizing shaft furnace discharge pipe according to claim 1, characterized in that: The discharge pipe body (1) is sheathed with a water cooling pipe (4), and a closed cavity is formed between the inner wall of the water cooling pipe (4) and the outer wall of the discharge pipe body (1). Both ends of the water cooling pipe (4) are fixedly connected to the outer wall of the discharge pipe body (1). The side wall of the end of the water cooling pipe (4) close to the ground is connected to a water supply pipe (41), and the side wall of the end of the water cooling pipe (4) away from the ground is connected to a water outlet pipe (42).

4. A pelletizing shaft furnace body discharge pipe according to claim 3, characterized in that: It also includes a water cooling device (5), wherein one end of the water supply pipe (41) away from the water cooling pipe (4) is connected to the water cooling device (5), and one end of the water outlet pipe (42) away from the water cooling pipe (4) is connected to the water cooling device (5).

5. The pelletizing shaft furnace discharge pipe according to claim 3, characterized in that: A water supply pump (43) is installed on the water supply pipe (41), and a water pump (44) is installed on the water outlet pipe (42).

6. The pelletizing shaft furnace body discharge pipe according to claim 3, characterized in that: An air diffusion hole (45) is provided at one end of the water cooling pipe (4) away from the ground, a water receiving trough (6) is provided below the air diffusion hole (45), and the water receiving trough (6) is installed on the water cooling pipe (4).

7. The pelletizing shaft furnace discharge pipe according to claim 6, characterized in that: A dustproof plate (7) is provided above the air diffusion hole (45), and the dustproof plate (7) is installed on the water cooling pipe (4).

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