Cooling equipment for prolonging service life of blast furnace cooling wall

Abstract

The cooling equipment for prolonging the service life of the blast furnace cooling wall comprises a cooling rod and a water bag, the cooling rod comprises an outer column body, a flange is arranged on the middle top of the outer column body, a hole is formed in the top of the outer column body and fixedly connected with a water outlet pipe, and the water outlet pipe is located between the flange and the top of the outer column body. An inner column body is placed in a closed cavity in the outer column body, a spiral partition plate is arranged on the surface of the lower half portion of the inner column body, and eight partition plates are arranged in the water bag in a staggered mode and used for dividing water flow. According to the utility model, the water bag is arranged to replace a damaged water passing pipe, the flow resistance of circulating water in the pipeline is increased due to the design of the partition plates in the water bag, and the cooling circulating water is uniformly distributed on the water bag due to the eight partition pipes, so that the cooling effect of the cooling water bag is enhanced, heat is transferred to the circulating water, and the heat dissipation efficiency is improved; distribution is compact, installation space is saved, and the service life of the blast furnace cooling wall is greatly prolonged through matched use of the water bag and the cooling rod.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, and particularly relates to a cooling equipment for prolonging the service life of a blast furnace cooling stave. Background Technique

[0002] The blast furnace cooling stave is an important water-cooled part of the blast furnace lining, which is installed in parts such as the furnace body, furnace waist, furnace belly, and hearth of the blast furnace. It not only withstands high temperatures but also withstands the wear of furnace charge, the erosion of molten slag, and the scouring of coal gas flow. It must have good comprehensive properties such as thermal strength, heat shock resistance, and resistance to rapid cooling and heating. The cooling stave can effectively prevent the furnace shell from being heated and burned red. After the blast furnace lining bricks are ablated, the slag skin mainly protects the cooling stave itself and maintains the safe production of the blast furnace. Therefore, the quality and performance of the cooling stave determine its service life and even the life of the blast furnace body. The production situations of iron and steel enterprises at home and abroad prove that one of the keys to the long life of the blast furnace is to achieve the long life of the cooling stave. Therefore, improving the quality and service life of the cooling stave is an important research topic for the long life of the blast furnace.

[0003] The cooling stave is an important part of the heat transfer system of the blast furnace, providing effective cooling for the blast furnace. It is one of the most important blast furnace cooling equipment, playing a role in supporting the refractory lining, reducing the lining temperature, and maintaining the integrity of the lining, so as to maintain a reasonable operating profile of the blast furnace. At the same time, after the refractory material disappears, the cooling stave forms a protective slag skin by means of cooling, forming a "permanent" lining.

[0004] According to the design characteristics and deficiencies of the brick-wall integrated thin furnace lining adopted in the existing blast furnace furnace type design, combined with the actual blast furnace production, after the blast furnace cooling stave is used for a certain period, due to changes in water quality conditions, blast furnace smelting conditions, etc., damage phenomena are inevitable. And the cooling stave cannot be replaced after damage. If the damaged cooling stave is not processed in time, a large amount of cooling water is likely to leak into the furnace, resulting in a cold furnace and frozen hearth in the light case, and serious cases will cause the blast furnace body to burn through, affecting the service life of the blast furnace cooling stave.

[0005] To overcome the above deficiencies, through retrieval, it is found that the publication number is: CN105154607A, a method for online repair of a blast furnace cooling stave, which repairs the cooling stave by drilling holes in the cooling stave, then inserting copper cooling rods, and connecting the water inlet pipe and the water outlet pipe of the copper cooling rods to the undamaged pipelines in the cooling stave respectively, so as to extend the service life of the blast furnace cooling stave. However, in the above scheme, if the pipelines in the cooling stave are broken, the repair of the cooling stave cannot be carried out, and the limitations are relatively large. Content of the Utility Model

[0006] The purpose of the utility model is to provide a cooling equipment for prolonging the service life of a blast furnace cooling stave, so as to solve the problems put forward in the above background technique.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A cooling device for prolonging the service life of a blast furnace cooling stave, comprising a water jacket and cooling rods. Both ends of the water jacket are open. The left end is connected with a water outlet, and the right end is connected with a water inlet. The water jacket is welded to the outside of the cooling stave. The top of the side of the cooling rod is connected with a water outlet pipe, and the water outlet pipe is connected with the water inlet of the water jacket. The cooling rod is embedded inside the cooling stave, and the water jacket is used to cool down the cooling water discharged from the cooling rod.

[0009] Preferably, the cooling rod comprises an outer cylinder. A flange is arranged at the middle part near the top of the outer cylinder. The flange is stuck outside the cooling stave to fix the cooling rod on the cooling stave. The outer cylinder is provided with a water outlet pipe fixedly connected by an opening near the top. The water outlet pipe is located between the flange and the top of the outer cylinder. An inner cylinder is placed in the inner cavity of the outer cylinder. A spiral partition for dividing the water flow is arranged on the surface of the lower half part of the inner cylinder.

[0010] Preferably, the top of the inner cylinder protrudes from the outer cylinder and is exposed outside. The protruding part accounts for one-eighth of the total length of the inner cylinder. The inner part of the inner cylinder is hollow. The protruding part at the top of the inner cylinder is the water inlet. The cooling liquid flows in from the water inlet, passes through the inner cylinder and then flows out from the bottom of the inner cylinder into the cavity. The copper content of the inner cylinder is greater than 99.9%.

[0011] Preferably, the bottom of the outer cylinder is wrapped with an alloy wear-resistant layer.

[0012] Preferably, the effective length of the cooling rod is 250 millimeters.

[0013] Preferably, eight partitions are arranged alternately inside the water jacket. The partitions are 10-millimeter stainless steel plates.

[0014] Preferably, the right end of the water jacket is provided with an opening connected with a water inlet, and the left end is provided with an opening connected with a water outlet. The diameters of the water inlet and the water outlet are 32 millimeters.

[0015] Preferably, the length of the water jacket is 1 meter and the width is 30 centimeters.

[0016] Preferably, detection devices are installed on two partitions near the water outlet and the water inlet.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] There are four water pipes inside the cooling stave. When the water pipes are damaged in the later stage of the furnace campaign, cooling rods and water jackets are installed on the damaged cooling staves of each layer. Compared with the straight cylindrical cooling pipes, the heat transfer area of the water jacket increases. The diameter of the water pipes in the water jacket increases and the heat exchange area expands, so the cooling effect is better. The combination of the cooling rod and the water jacket strengthens the air flow circulation, improves the transverse temperature difference between the middle and the edge, and makes the cooling effect of the cooling stave uniform.

[0019] The zigzag design of the water jacket increases the flow resistance of the circulating water in the pipeline. The eight partition pipes evenly distribute the cooling circulating water on the water jacket, thereby enhancing the cooling effect of the cooling water jacket, transferring heat to the circulating water, improving the heat dissipation efficiency, being compact in distribution and saving installation space. A detection device is installed on the partition plate in the water jacket to effectively detect the water flow rate, temperature and water pressure at the water inlet and outlet, and then analyze whether there is a blockage and the working condition of the cooling equipment, so as to control the water flow rate. Description of the Drawings

[0020] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 Schematic diagram of the water jacket structure of the present utility model;

[0022] Figure 3 Schematic diagram of the cooling rod structure of the present utility model;

[0023] Figure 4 is Figure 3 right view;

[0024] In the figure: 1. cooling wall; 2. water jacket; 3. water outlet; 4. water inlet; 5. partition plate; 6. detection device; 7. cooling rod; 8. outer cylinder; 9. flange; 10. alloy wear-resistant layer; 11. inner cylinder; 12. spiral partition plate; 13. water inlet; 14. water outlet pipe; 15. cavity. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment:

[0027] Please refer to Figures 1 to 4 , the present utility model provides a technical solution:

[0028] A cooling device for prolonging the service life of a blast furnace cooling wall, including a water jacket 2 and a cooling rod 7, characterized in that both ends of the water jacket 2 are opened, the left end is connected with a water outlet 3, the right end is connected with a water inlet 4, and the water jacket 2 is welded to the outside of the cooling wall 1; the top of the side of the cooling rod 7 is connected with a water outlet pipe 14, and the water outlet pipe 14 is connected with the water inlet 4 of the water jacket 2. The cooling rod 7 is embedded inside the cooling wall 1, and the water jacket 2 is used to cool the cooling water discharged from the cooling rod 7.

[0029] Specifically, the cooling rod 7 includes an outer cylinder 8, a flange 9 is provided at the top of the middle of the outer cylinder 8, the flange 9 is clamped on the outside of the cooling wall, and is used to fix the cooling rod 7 on the cooling wall 1. The outer cylinder 8 is fixedly connected to a water outlet pipe 14 by a top opening, and the water outlet pipe 14 is located between the flange 9 and the top of the outer cylinder 8. An inner cylinder 11 is placed in the internal cavity 15 of the outer cylinder 8, and a spiral partition 12 is provided on the lower half of the surface of the inner cylinder 11 for dividing the water flow.

[0030] Specifically, the top of the inner cylinder 11 protrudes from the outer cylinder 8 and is exposed to the outside, and the protruding part accounts for one eighth of the entire length of the inner cylinder 11. The inner cylinder 11 is hollow, and the protruding part on the top of the inner cylinder 11 is a water inlet 13. The coolant flows into the inner cylinder 11 from the water inlet 13 and then flows out from the bottom of the inner cylinder 11 into the cavity 15. The copper content of the inner cylinder 11 is greater than 99.9%.

[0031] Specifically, the bottom of the outer column 8 is wrapped with an alloy wear-resistant layer 10, which has good thermal conductivity and wear resistance, can withstand the erosion of furnace charge and high-temperature airflow during blast furnace operation, and improves the service life of the cooling rod 7.

[0032] Specifically, the effective length of the cooling rod 7 is 250 mm.

[0033] Specifically, eight partitions 4 are staggered inside the water bag 2. The partitions 4 are 10 mm stainless steel plates that can prevent corrosion and impact of circulating water. They are installed outside the cooling wall. During the installation process, they can be installed in any damaged cooling wall according to actual conditions.

[0034] Specifically, the right end opening of the water bag 2 is connected to the water inlet 4, and the left end opening is connected to the water outlet 3. The diameters of the water inlet 4 and the water outlet 3 are 32 mm.

[0035] Specifically, the water bag 2 is 1 meter long and 30 centimeters wide.

[0036] Specifically, a detection device 6 is installed on two partitions 12 near the water outlet 3 and the water inlet 4. The detection device 6 includes a temperature detection module, a water flow detection module and a water pressure detection module, which can effectively detect the water flow, temperature and water pressure at the water inlet and outlet, and then analyze the use of the cooling equipment to change the water flow rate.

[0037] On the premise of smooth furnace operation, cooling rods 7 are embedded in the damaged cooling stave and fixed through flange 9. At the same time, a water pocket 2 is welded on the outer side of the furnace wall to replace the damaged water pipe. Cooling water enters the inner cylinder 11 through the water inlet 4 and then flows into the cavity 15 from the bottom of the inner cylinder 11, taking away the heat at the top of the cooling rod 7, and then flowing out through the water outlet pipe 14. The water outlet pipe 14 is connected to the water inlet 4 of the water pocket 2. The cooling water reduces the water temperature after passing through the water pocket 2. Eight partitions 5 make the water flow evenly distributed on the water pocket 2 for uniform heat dissipation. The combined use of the cooling rod 7 and the water pocket 2 controls the cooling water flow rate at 4247m 3 / h, controls the water pressure at 0.55 mpa, controls the water temperature difference at about 5 °C, and the heat flux intensity at about 15614 Kj / m 2 / h. By cooperating with operations such as spraying water on the furnace shell, etc., the temperature of the cooling stave is reduced, and the slag and iron containing Ti compounds contact and bond with the furnace lining to form an integrated body, achieving the purpose of slag hanging and lining building, maintaining a stable furnace lining thickness, eliminating the red dots on the furnace shell, and extending the service life of the blast furnace.

[0038] For the rest of the present utility model that is not described, it can be the same as the prior art, or be well-known technology, or can be implemented by using the prior art, and will not be elaborated here.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cooling device for extending the service life of a blast furnace cooling wall, comprising a water bag (2) and a cooling rod (7), characterized in that: The water bag (2) has holes at both ends, the left end is connected to a water outlet (3), and the right end is connected to a water inlet (4), and the water bag (2) is welded to the outside of the cooling wall (1); The top of the side of the cooling rod (7) is connected to a water outlet pipe (14), the water outlet pipe (14) is connected to the water inlet (4) of the water bag (2), the cooling rod (7) is embedded in the cooling wall (1), and the water bag (2) is used to cool the cooling water discharged from the cooling rod (7).

2. The cooling device for extending the service life of a blast furnace cooling stave according to claim 1, characterized in that: The cooling rod (7) comprises an outer cylinder (8), a flange (9) is arranged at the middle part of the top of the outer cylinder (8), the flange (9) is clamped on the outside of the cooling wall, and is used to fix the cooling rod (7) on the cooling wall (1), the outer cylinder (8) is fixedly connected to a water outlet pipe (14) near the top opening, and the water outlet pipe (14) is located between the flange (9) and the top of the outer cylinder (8), an inner cylinder (11) is placed in the internal cavity (15) of the outer cylinder (8), and a spiral partition (12) is arranged on the lower half of the surface of the inner cylinder (11) for dividing the water flow.

3. The cooling device for extending the service life of a blast furnace cooling stave according to claim 2, characterized in that: The top of the inner cylinder (11) protrudes from the outer cylinder (8) and is exposed to the outside, and the protruding portion accounts for one eighth of the length of the entire inner cylinder (11). The inner cylinder (11) is hollow, and the protruding portion at the top of the inner cylinder (11) is a water inlet (13). Cooling liquid flows into the inner cylinder (11) from the water inlet (13) and then flows out from the bottom of the inner cylinder (11) into the cavity (15). The copper content of the inner cylinder (11) is greater than 99.9%.

4. The cooling device for extending the service life of a blast furnace cooling stave according to claim 2, characterized in that: The bottom of the outer cylinder (8) is wrapped with an alloy wear-resistant layer (10).

5. The cooling device for extending the service life of a blast furnace cooling stave according to claim 1, characterized in that: The effective length of the cooling rod (7) is 250 mm.

6. The cooling device for extending the service life of a blast furnace cooling stave according to claim 1, characterized in that: Eight partitions (5) are arranged in a staggered manner inside the water bag (2), and the partitions (5) are 10 mm stainless steel plates.

7. The cooling device for extending the service life of a blast furnace cooling stave according to claim 1, characterized in that: The right end opening of the water bag (2) is connected to a water inlet (4), and the left end opening is connected to a water outlet (3). The diameters of the water inlet (4) and the water outlet (3) are 32 mm.

8. The cooling device for extending the service life of a blast furnace cooling stave according to claim 1, characterized in that: The water bag (2) is 1 meter long and 30 centimeters wide.

9. A cooling device for extending the service life of a blast furnace cooling stave according to claim 1 or 6, characterized in that: A detection device (6) is installed on two partitions (5) close to the water outlet (3) and the water inlet (4).

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