Blast furnace iron-making air inlet device with cooling structure

Abstract

The utility model discloses a blast furnace ironmaking air inlet device with cooling structure, including base and the air inlet pipe of setting in the upper portion of base, the outer surface of air inlet pipe is fixedly connected with the outer layer cylinder along its length direction, and the cavity of tubular is formed between the outer surface of outer layer cylinder and air inlet pipe, and the inside of cavity is fixedly connected with a plurality of partition rings evenly and interval along its length direction, the utility model relates to blast furnace ironmaking technical field. This blast furnace ironmaking air inlet device with cooling structure, through setting up outer layer cylinder and a plurality of partition rings, this device fixes outer layer cylinder on the outer surface of air inlet pipe, and installs a plurality of partition rings in its inside, and the cavity between outer layer cylinder and air inlet pipe is divided and forms a plurality of annular heat exchange cavities, then through a plurality of liquid inlet branch pipes and a plurality of liquid outlet branch pipes respectively to a plurality of heat exchange cavities inside conveying and discharging heat exchange fluid, by this can guarantee that the whole pipe body of air inlet pipe is evenly cooled, and the phenomenon that temperature distribution is uneven will not appear.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace ironmaking technology, specifically to a blast furnace ironmaking air inlet device with a cooling structure. Background Technology

[0002] Blast furnace tuyeres are located on blast furnaces in ironmaking plants. High-temperature hot air blown in through the tuyeres oxidizes and burns coke from the furnace bottom, producing CO. As the CO rises at high temperatures, it reduces iron, which was originally in oxide form. Blast furnace tuyeres are characterized by good conductivity, uniform cooling, high cooling efficiency, dense structure, and good wear resistance. They are typically installed in the furnace wall between the belly and the bottom of the furnace, with the front 500mm extending into the furnace. They are directly subjected to the thermal erosion of molten slag and iron and severe wear from falling hot materials, making them prone to failure. Frequent tuyere replacements can lead to blast furnace shutdowns, resulting in low blast furnace production.

[0003] The cooling method for blast furnace tuyeres usually involves installing an annular water tank inside the blast furnace tuyere. The flow of cooling water in the annular water tank removes heat from the blast furnace tuyere, thereby reducing its temperature. However, as the cooling water flows through the annular water tank, its temperature gradually rises, causing the cooling effect to gradually decrease. This results in inconsistent cooling across the entire blast furnace tuyere, leading to localized temperature differences in the high-temperature tuyere area. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a blast furnace tuyeres air inlet device with a cooling structure, which solves the problem that the current cooling structure of blast furnace tuyeres cannot guarantee uniform cooling.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a blast furnace ironmaking air intake device with a cooling structure, including a base and an air intake pipe disposed on the upper part of the base, an outer cylinder is fixedly connected to the outer surface of the air intake pipe along its length direction, a tubular cavity is formed between the outer cylinder and the outer surface of the air intake pipe, and a plurality of partition rings are fixedly connected at uniform intervals along its length direction inside the cavity, the plurality of partition rings dividing the cavity to form a plurality of annular heat exchange chambers;

[0006] The top and bottom of the outer cylinder are respectively horizontally fixedly connected by a connecting frame to an inlet main pipe and an outlet main pipe arranged along its length. The bottom of the inlet main pipe and the upper part of the multiple heat exchange chambers are all connected to inlet branch pipes. The top of the outlet main pipe and the lower part of the multiple heat exchange chambers are all connected to outlet branch pipes.

[0007] Furthermore, connecting pieces are fixedly connected to the front and rear ends of both sides of the outer cylinder, and supporting legs are fixedly connected vertically to the outer surfaces of the connecting pieces, and the supporting legs are fixedly connected to the upper surface of the base.

[0008] Furthermore, a cooling box is provided on the outside of the base, and a cooling pipe is fixedly connected inside the cooling box. Both ends of the cooling pipe penetrate the rear surface of the cooling box and extend rearward. A placement seat is fixedly connected to the rear surface of the cooling box, and a liquid pump is fixedly connected to the upper surface of the placement seat. The outlet of the liquid pump is connected to one end of the liquid inlet manifold, the inlet of the liquid pump is connected to one end of the cooling pipe, and the other end of the cooling pipe is connected to one end of the liquid outlet manifold.

[0009] Furthermore, multiple side surfaces of the cooling box are provided with horizontally extending mounting ports, and multiple fans are fixedly connected inside one of the mounting ports.

[0010] Furthermore, a plurality of support pads are fixedly connected to the bottom of the cooling box.

[0011] Furthermore, the inner surface of the cooling pipe is fixedly connected with multiple extending protrusions along its length.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This blast furnace ironmaking air inlet device with a cooling structure, by setting an outer cylinder and multiple partition rings, fixes the outer cylinder on the outer surface of the air inlet pipe and installs multiple partition rings inside it, dividing the cavity between the outer cylinder and the air inlet pipe to form multiple annular heat exchange chambers. Then, multiple liquid inlet pipes and multiple liquid outlet pipes are used to transport and discharge heat exchange fluid into the multiple heat exchange chambers respectively, thereby ensuring that the entire air inlet pipe is cooled uniformly and that there is no uneven temperature distribution. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the cooling structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the cooling pipe of this utility model.

[0016] In the diagram: 1-base, 2-outer cylinder, 3-separation ring, 4-heat exchange chamber, 5-liquid inlet branch pipe, 6-liquid inlet main pipe, 7-liquid outlet branch pipe, 8-liquid outlet main pipe, 9-base, 10-connecting piece, 11-support leg, 12-cooling box, 13-cooling pipe, 14-placement seat, 15-liquid pump, 16-mounting port, 17-fan, 18-extension ridge, 19-support pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a technical solution: a blast furnace ironmaking air intake device with a cooling structure, including a base 9 and an air intake pipe 1 disposed on the upper part of the base 9. An outer cylinder 2 is fixedly connected to the outer surface of the air intake pipe 1 along its length direction. A tubular cavity is formed between the outer cylinder 2 and the outer surface of the air intake pipe 1. Multiple partition rings 3 are fixedly connected at even intervals along its length direction inside the cavity. The multiple partition rings 3 divide the cavity to form multiple annular heat exchange chambers 4.

[0019] The top and bottom of the outer cylinder 2 are respectively horizontally fixedly connected by a connecting frame to an inlet main pipe 6 and an outlet main pipe 8 arranged along its length. The bottom of the inlet main pipe 6 and the upper part of multiple heat exchange chambers 4 are connected to inlet branch pipes 5, and the top of the outlet main pipe 8 and the lower part of multiple heat exchange chambers 4 are connected to outlet branch pipes 7.

[0020] The device fixes an outer cylinder 2 on the outer surface of the air inlet pipe 1 and installs multiple partition rings 3 inside it to divide the cavity between the outer cylinder 2 and the air inlet pipe 1 into multiple annular heat exchange chambers 4. Then, multiple liquid inlet pipes 5 and multiple liquid outlet pipes 7 are used to transport and discharge heat exchange fluid into the multiple heat exchange chambers 4 respectively. In this way, it can ensure that the entire pipe body of the air inlet pipe 1 is cooled evenly and there will be no uneven temperature distribution.

[0021] When the device is in operation, the cooling fluid enters multiple inlet branch pipes 5 through the main inlet pipe 6, then enters the interior of multiple heat exchange chambers 4, and finally flows out through multiple outlet branch pipes 7 before converging into the main outlet pipe 8. During this process, the cooling fluid can cool and exchange heat with the air inlet pipe 1 for a period of time inside the heat exchange chamber 4. Since the volume of multiple heat exchange chambers 4 is small, the cooling fluid will not stay inside them for too long, and there will be no temperature difference between the front and back parts.

[0022] Connecting pieces 10 are fixedly connected to the front and rear ends of both sides of the outer cylinder 2. Support legs 11 are fixedly connected vertically to the outer surfaces of multiple connecting pieces 10. Multiple support legs 11 are fixedly connected to the upper surface of the base 9.

[0023] The air inlet duct 1 is supported by multiple support legs 11.

[0024] A cooling box 12 is provided on the outside of the base 9. A cooling pipe 13 is fixedly connected inside the cooling box 12 and arranged around it. Both ends of the cooling pipe 13 pass through the rear surface of the cooling box 12 and extend to the rear. A placement seat 14 is fixedly connected to the rear surface of the cooling box 12. A liquid pump 15 is fixedly connected to the upper surface of the placement seat 14. The outlet of the liquid pump 15 is connected to one end of the liquid inlet manifold 6, the inlet of the liquid pump 15 is connected to one end of the cooling pipe 13, and the other end of the cooling pipe 13 is connected to one end of the liquid outlet manifold 8.

[0025] Under the action of the liquid pump 15, the cooling fluid in the device circulates in the cooling pipe 13, the inlet manifold 6, the heat exchange chamber 4 and the outlet manifold 8. When the cooling fluid flows into the interior of the cooling pipe 13, it can be cooled down by the cooling of the outside air, so that when it flows into the interior of the heat exchange chamber 4 again, it can be fully heat exchanged again.

[0026] The cooling box 12 is located in the outside environment away from the blast furnace to prevent the heat generated by the blast furnace from affecting its cooling effect.

[0027] Multiple side surfaces of the cooling box 12 are provided with horizontally extending mounting ports 16, and multiple fans 17 are fixedly connected inside one of the mounting ports 16.

[0028] Multiple fans 17 accelerate the airflow speed in the cooling box 12, thereby increasing the cooling rate of the cooling fluid inside the cooling pipe 13.

[0029] Multiple support blocks 19 are fixedly connected to the bottom of the cooling box 12.

[0030] Multiple extending protrusions 18 are fixedly connected to the inner surface of the cooling pipe 13 along its length.

[0031] Multiple support pads 19 provide support, and the extended ridges 18 increase the contact area between the cooling pipe 13 and the cooling fluid, thereby enabling it to cool down more quickly and efficiently.

[0032] When the device is in operation, an outer cylinder 2 is fixed on the outer surface of the air inlet pipe 1, and multiple partition rings 3 are installed inside it to divide the cavity between the outer cylinder 2 and the air inlet pipe 1 into multiple annular heat exchange chambers 4. Then, heat exchange fluid is transported and discharged into the multiple heat exchange chambers 4 through multiple liquid inlet pipes 5 and multiple liquid outlet pipes 7, thereby ensuring that the entire air inlet pipe 1 is cooled evenly and that there is no uneven temperature distribution.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blast furnace ironmaking air intake device with a cooling structure, characterized in that: Includes a base (9) and an air inlet pipe (1) disposed on the upper part of the base (9). An outer layer cylinder (2) is fixedly connected to the outer surface of the air inlet pipe (1) along its length direction. A tubular cavity is formed between the outer layer cylinder (2) and the outer surface of the air inlet pipe (1). Multiple partition rings (3) are fixedly connected at even intervals along its length direction inside the cavity. The multiple partition rings (3) divide the cavity to form multiple annular heat exchange chambers (4). The top and bottom of the outer cylinder (2) are respectively horizontally fixedly connected by a connecting frame to an inlet main pipe (6) and an outlet main pipe (8) arranged along its length direction. The bottom of the inlet main pipe (6) and the upper part of the multiple heat exchange chambers (4) are all connected to inlet branch pipes (5). The top of the outlet main pipe (8) and the lower part of the multiple heat exchange chambers (4) are all connected to outlet branch pipes (7).

2. The blast furnace ironmaking air inlet device with a cooling structure according to claim 1, characterized in that: Connecting pieces (10) are fixedly connected to the front and rear ends of both sides of the outer cylinder (2), and supporting legs (11) are fixedly connected vertically to the outer surfaces of the multiple connecting pieces (10), and the multiple supporting legs (11) are fixedly connected to the upper surface of the base (9).

3. The blast furnace ironmaking air inlet device with a cooling structure according to claim 1, characterized in that: A cooling box (12) is provided on the outside of the base (9). A cooling pipe (13) is fixedly connected inside the cooling box (12) and arranged around it. Both ends of the cooling pipe (13) pass through the rear surface of the cooling box (12) and extend to the rear. A placement seat (14) is fixedly connected to the rear surface of the cooling box (12). A liquid pump (15) is fixedly connected to the upper surface of the placement seat (14). The outlet of the liquid pump (15) is connected to one end of the liquid inlet manifold (6). The inlet of the liquid pump (15) is connected to one end of the cooling pipe (13). The other end of the cooling pipe (13) is connected to one end of the liquid outlet manifold (8).

4. A blast furnace ironmaking air intake device with a cooling structure according to claim 3, characterized in that: The cooling box (12) has multiple side surfaces that are laterally opened with mounting ports (16), and multiple fans (17) are fixedly connected inside one of the mounting ports (16).

5. A blast furnace ironmaking air intake device with a cooling structure according to claim 3, characterized in that: The bottom of the cooling box (12) is fixedly connected to a plurality of support pads (19).

6. A blast furnace ironmaking air inlet device with a cooling structure according to claim 3, characterized in that: The inner surface of the cooling pipe (13) is fixedly connected with a plurality of extending protrusions (18) along its length.

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