A cooling device for extending the service life of blast furnace cooling walls

Abstract

This utility model discloses a cooling device for extending the service life of blast furnace cooling walls, including a medium-pressure water pipe. The medium-pressure water pipe is located at the bottom of the furnace and surrounds half of the hearth. Two medium-pressure water pipes can completely surround the hearth. The medium-pressure water pipe adopts a top-in, bottom-out water inlet method, and both ends of the medium-pressure water pipe are connected to a cooling tower. The beneficial effects of this utility model are that by installing medium-pressure water pipes on the outside of the hearth and increasing the flow of medium-pressure water in the pipes, heat can be carried away from the cooling walls at the hearth, increasing the water flow rate and enhancing the cooling intensity. This reduces the surface temperature of the cooling walls, keeping them in a relatively low-temperature working environment, effectively slowing down the rate of erosion, extending the service life of the cooling walls, reducing the frequency of repairs and replacements due to cooling wall damage, and lowering equipment maintenance costs.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace cooling equipment, and more specifically, to a cooling device for extending the service life of blast furnace cooling walls. Background Technology

[0002] Blast furnace cooling walls are crucial water-cooled components within the blast furnace lining. Installed in the furnace body, waist, belly, and hearth, they withstand not only high temperatures but also wear from the furnace charge, erosion from molten slag, and scouring from the gas flow. Therefore, they must possess excellent comprehensive properties, including thermal strength, resistance to thermal shock, and resistance to rapid heating and cooling. The taphole area of ​​the blast furnace operates under harsh conditions. The mechanical scouring of slag and iron during tapping, along with the high-temperature slag and iron flow, often leads to severe taphole erosion. Furthermore, the cooling wall temperature at this location is high, and the soft water closed-loop cooling system alone cannot effectively cool the cooling wall, thus affecting its service life. Utility Model Content

[0003] The purpose of this invention is to solve the problem of excessively high cooling wall temperature affecting service life, and to design a cooling device that extends the service life of blast furnace cooling walls.

[0004] To achieve the above objectives, the technical solution of this utility model is a cooling device for extending the service life of blast furnace cooling walls, comprising a medium-pressure water pipe, wherein the medium-pressure water pipe is located at the bottom of the furnace and surrounds half of the furnace hearth, and two medium-pressure water pipes can completely surround the furnace hearth, wherein the medium-pressure water pipe adopts an upward inlet and downward outlet water inlet method, and both ends of the medium-pressure water pipe are connected to a cooling tower.

[0005] Furthermore, the temperature of the medium-pressure water in the medium-pressure water pipe is 28-32 degrees Celsius, and the water pressure is 0.8 MPa.

[0006] Furthermore, the medium-pressure water pipe includes a main inlet pipe, a main outlet pipe is provided below the main inlet pipe, and a spiral pipe is provided between the main inlet pipe and the main outlet pipe, the spiral pipe connecting the main inlet pipe and the main outlet pipe.

[0007] Furthermore, a first solenoid valve is installed at the inlet end of the main water inlet pipe, and a temperature sensor is installed at the first solenoid valve.

[0008] Furthermore, the spiral pipe has inlet and outlet at the bends at the upper and lower ends, and a second solenoid valve is installed at the inlet and outlet. The second solenoid valve at the upper end of the spiral pipe is connected to the main inlet pipe, and the second solenoid valve at the lower end of the spiral pipe is connected to the main outlet pipe.

[0009] Furthermore, a baffle is installed inside the main water inlet pipe, and a water-permeable hole is opened at the end of the baffle away from the main water inlet pipe. An interception plate is installed below the end of the baffle close to the main water inlet pipe.

[0010] The beneficial effects of this utility model are as follows: By installing a medium-pressure water pipe on the outside of the furnace hearth and increasing the flow of medium-pressure water in the pipe, the heat from the cooling wall at the furnace hearth can be carried away, increasing the water flow rate and enhancing the cooling intensity. This reduces the surface temperature of the cooling wall, keeping it in a relatively low-temperature working environment, effectively slowing down the rate of erosion, extending its service life, reducing the frequency of repairs and replacements due to cooling wall damage, and lowering equipment maintenance costs. Sufficient cooling intensity ensures that the cooling water in the pipe is within a suitable temperature range, preventing problems such as deformation, bulging, or even rupture of the pipe due to local overheating, maintaining the normal working condition of the pipe, and ensuring the reliability of the cooling system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a cooling device for extending the service life of a blast furnace cooling wall as described in this utility model;

[0012] Figure 2 This is a schematic diagram showing the connection relationship between the main water inlet pipe and the baffle plate described in this utility model;

[0013] Figure 3 This is a schematic diagram showing the connection relationship between the main water inlet pipe and the spiral water pipe described in this utility model;

[0014] In the diagram, 1. Medium-pressure water pipe; 2. Main inlet pipe; 3. Main outlet pipe; 4. Coiled pipe; 5. First solenoid valve; 6. Temperature sensor; 7. Inlet and outlet; 8. Second solenoid valve; 9. Baffle plate; 10. Water permeable hole; 11. Interception plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] This utility model provides, for example Figure 1-3 The cooling device shown is for extending the service life of the blast furnace cooling wall. It includes a medium-pressure water pipe 1, which is located at the bottom of the furnace and surrounds half of the furnace hearth. Two medium-pressure water pipes 1 can completely surround the furnace hearth. The medium-pressure water pipe 1 adopts an inlet-outlet water inlet method. Both ends of the medium-pressure water pipe 1 are connected to the cooling tower.

[0018] The cooling process of this device for the cooling wall is as follows: Medium-pressure water pipes 2 are installed at the position of the blast furnace hearth, only encircling half of the hearth. By installing two medium-pressure water pipes at the hearth position, the entire hearth can be wrapped. Since the water in each medium-pressure water pipe 2 flows a shorter distance outside the cooling wall, it prevents the water temperature in the medium-pressure water pipe 2 from being too high and affecting the cooling efficiency. Cooling the water in the medium-pressure water pipe 1 through the cooling tower ensures that the water temperature entering the medium-pressure water pipe 1 is lower, facilitating the cooling of the cooling wall. The water in the medium-pressure water pipe 1 is medium-pressure water, which increases the water flow rate, carrying away a large amount of heat, facilitating the cooling of the cooling wall, and thus extending its service life.

[0019] The medium-pressure water temperature in medium-pressure water pipe 1 is 28-32 degrees Celsius, and the water pressure is 0.8 MPa. Sufficient low temperature and water pressure can ensure the cooling effect of medium-pressure water pipe 1 on the cooling wall.

[0020] Refer to the instruction manual appendix Figure 1 The medium-pressure water pipe 1 includes a main inlet pipe 2, a main outlet pipe 3 below the main inlet pipe 2, and a spiral pipe 4 between the main inlet pipe 2 and the main outlet pipe 3. The spiral pipe 4 connects the main inlet pipe 2 and the main outlet pipe 3. Water in the cooling tower flows to the outside of the cooling wall through the main inlet pipe 2, and enters the main outlet pipe 3 through the spiral pipe 4, and finally returns to the cooling tower, thus realizing water circulation and cooling the cooling wall. The spiral pipe 4 can increase the flow time of water on the outside of the cooling wall, which is convenient for cooling.

[0021] Refer to the instruction manual appendix Figure 1The main water inlet pipe 2 is equipped with a first solenoid valve 5 at its inlet end, and a temperature sensor 6 is installed at the first solenoid valve 5. Under normal conditions, the blast furnace can be cooled by the soft water closed cooling system of the cooling wall itself. When the taphole position is too high, the temperature sensor 6 can detect the temperature at the taphole position. When the temperature is too high, the first solenoid valve 5 is opened, which allows the low temperature water in the cooling tower to enter the medium pressure water pipe 1, thereby facilitating the cooling of the cooling wall. When the temperature drops, the first solenoid valve 5 is closed, and there is no need to use the medium pressure pipe 1 for cooling, which can save costs.

[0022] Refer to the instruction manual appendix Figure 1 Included with instruction manual Figure 3 The spiral pipe 4 has inlet and outlet 7 at the bends at the upper and lower ends. A second solenoid valve 8 is installed at the inlet and outlet 7. The second solenoid valve 8 at the upper end of the spiral pipe 4 is connected to the main water inlet pipe 2, and the second solenoid valve 8 at the lower end of the spiral pipe 4 is connected to the main water outlet pipe 3. When the temperature at the blast furnace taphole is too high, the water in the spiral pipe 4 flows in a continuous stream, resulting in a lower water temperature at the inlet end and a higher water temperature at the outlet end, which will cause uneven cooling of the cooling wall. By opening the second solenoid valve 8, the water in the main water inlet pipe 2 can enter the spiral pipe 4 through the second solenoid valve 8 at the upper end and the inlet and outlet 7, and then enter the main water outlet pipe 3 through the inlet and outlet 7 and the second solenoid valve 8 at the lower end. Then the water can enter the cooling tower for cooling, which can cool the cooling wall more evenly and prevent local high temperature.

[0023] Refer to the instruction manual appendix Figure 2 Included with instruction manual Figure 3 A baffle 9 is installed inside the main water inlet pipe 2. A water permeable hole 10 is opened at the end of the baffle 9 away from the main water inlet pipe 2. An intercepting plate 11 is installed below the end of the baffle 9 close to the main water inlet pipe 2. This allows the water in the main water inlet pipe 2 to flow above the baffle 9 and then flow through the water permeable hole 10 to the bottom of the baffle 9, so that the water can enter the spiral pipe 4 and prolong the time that the water stays in the main water inlet pipe 2.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cooling device for prolonging the service life of a blast furnace cooling stave, comprising a medium-pressure water pipe (1), characterized in that, The medium-pressure water pipe (1) is located at the bottom of the furnace. The medium-pressure water pipe (1) surrounds half of the furnace cylinder. Two medium-pressure water pipes (1) can completely surround the furnace cylinder. The medium-pressure water pipe (1) adopts an inlet-outlet water inlet method. Both ends of the medium-pressure water pipe (1) are connected to the cooling tower.

2. A cooling device for prolonging the service life of a cooling stave of a blast furnace according to claim 1, characterized in that, The medium-pressure water temperature in the medium-pressure water pipe (1) is 28-32 degrees Celsius, and the water pressure is 0.8 MPa.

3. The cooling device for extending the service life of blast furnace cooling walls according to claim 1, characterized in that, The medium-pressure water pipe (1) includes a main water inlet pipe (2), and a main water outlet pipe (3) is provided below the main water inlet pipe (2). A spiral pipe (4) is provided between the main water inlet pipe (2) and the main water outlet pipe (3), and the spiral pipe (4) connects the main water inlet pipe (2) and the main water outlet pipe (3).

4. A cooling device for extending the service life of blast furnace cooling walls according to claim 3, characterized in that, The main water inlet pipe (2) is equipped with a first solenoid valve (5) at the inlet end, and a temperature sensor (6) is installed at the first solenoid valve (5).

5. A cooling device for extending the service life of blast furnace cooling walls according to claim 4, characterized in that, The spiral pipe (4) has inlet and outlet (7) at the bends at the upper and lower ends. A second electromagnetic valve (8) is installed at the inlet and outlet (7). The second electromagnetic valve (8) at the upper end of the spiral pipe (4) is connected to the main water inlet pipe (2), and the second electromagnetic valve (8) at the lower end of the spiral pipe (4) is connected to the main water outlet pipe (3).

6. A cooling device for extending the service life of blast furnace cooling walls according to claim 5, characterized in that, A baffle (9) is installed inside the main water inlet pipe (2). A water-permeable hole (10) is opened at the end of the baffle (9) away from the main water inlet pipe (2). An interceptor plate (11) is installed below the end of the baffle (9) close to the main water inlet pipe (2).

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