Water cooling device for a side-blown furnace

Abstract

The utility model relates to side -blowing furnace cooling technical field, concretely for a kind of water cooling device for side -blowing furnace, including water cooling beam body, and the lower part of water cooling beam body is fixedly arranged in the refractory layer of side -blowing furnace roof;Two water cooling chambers are arranged in water cooling beam body, and each water cooling chamber is fixedly provided with flow baffle, each flow baffle is separated into intercommunicating first chamber and second chamber in water cooling chamber, and the top of water cooling beam body is fixedly provided with two water inlet pipes and water outlet pipe, two water outlet pipes are located in the middle position of water cooling beam body, two water inlet pipes are located in the outside of two water outlet pipes, each water inlet pipe is communicated with a first chamber, and each water outlet pipe is communicated with a second chamber.The water cooling device for side -blowing furnace of the utility model sets up flow baffle, makes the turbulence degree of low-temperature cooling water greatly improve, and then significantly reduce the refractory layer temperature of side -blowing furnace roof, improves cooling efficiency, also reduces the risk of scale formation.

Description

Technical Field

[0001] This utility model relates to the field of side-blown furnace cooling technology, specifically to a water-cooling device for a side-blown furnace. Background Technology

[0002] Although the top area of ​​a side-blown furnace is far from the molten pool, it is continuously exposed to the radiation and scouring of high-temperature dust- and sulfur-containing flue gas at 1000℃~1200℃, accompanied by the impact of lance backfire and secondary combustion. Conventional refractory castable layers or fiber insulation layers are prone to peeling and cracking due to their low heat capacity and poor thermal shock resistance, leading to localized overheating, deformation, and even weld cracking of the furnace top, which in turn can cause flue gas leakage and furnace top burn-through accidents.

[0003] While existing copper or cast steel water jackets can provide forced cooling for refractory castable layers, they are heavy, costly, and difficult to install and maintain within the narrow dome space. Furthermore, the long, narrow cooling channels of the water jackets are prone to scaling and blockage, failing to meet the requirements for long-term safe and stable operation of the side-blown furnace roof. Therefore, a water-cooling device for side-blown furnaces is urgently needed to solve these problems. Utility Model Content

[0004] To address the technical problems of existing copper or cast steel water jackets, which, while providing forced cooling of the refractory castable layer, are heavy, costly, difficult to install and maintain in the narrow dome space, and prone to scaling and clogging due to their long and narrow cooling channels, this invention provides a water-cooling device for side-blown furnaces. Compared to existing copper or cast steel water jackets, the water-cooled beam body is lighter and less expensive, making it easier to install and fix in the refractory layer of the side-blown furnace roof. The inclusion of baffles significantly increases the turbulence of the low-temperature cooling water, improving cooling efficiency and thus significantly reducing the temperature of the refractory layer at the top of the side-blown furnace. This also reduces the risk of scaling, extends the operating cycle, and lowers maintenance and replacement costs.

[0005] This utility model provides a water-cooling device for a side-blown furnace, including a water-cooled beam body. The lower part of the water-cooled beam body is fixedly installed in the refractory layer of the furnace top. The water-cooled beam body has two water-cooled chambers inside. Each water-cooled chamber is fixedly equipped with a baffle plate, which divides the water-cooled chamber into a first chamber and a second chamber that are in communication. The top of the water-cooled beam body is fixedly equipped with two inlet pipes and two outlet pipes. The two outlet pipes are located in the middle of the water-cooled beam body, and the two inlet pipes are located outside the two outlet pipes. Each inlet pipe communicates with a first chamber, and each outlet pipe communicates with a second chamber.

[0006] Furthermore, the water-cooled beam body includes an irregularly shaped bottom plate, an arched top plate, two side plates, and an end plate. The bottoms of the two side plates are fixedly mounted on the irregularly shaped bottom plate, and the distance between the two side plates is less than the width of the irregularly shaped bottom plate. The arched top plate is fixedly mounted on the top of the two side plates. Each end plate is fixedly mounted between the ends of the irregularly shaped bottom plate, the arched top plate, and the two side plates. The lower parts of the irregularly shaped bottom plate, the two side plates, and the end plates are fixedly mounted in the refractory layer of the side-blown furnace roof, and the upper parts of the arched top plate, the two side plates, and the end plates are located above the refractory layer of the side-blown furnace roof. The water-cooled beam body is formed by welding the irregularly shaped bottom plate, the arched top plate, the two side plates, and the end plates into a sealed box shape.

[0007] Furthermore, a partition is fixedly installed at the middle position of the irregularly shaped bottom plate, the arched top plate, and the two side plates. The partition divides the interior of the water-cooled beam body into two water-cooled chambers. The partition is centrally located, and the cooling water fully covers both water-cooled chambers, eliminating dead zones and shortening the cooling water return path to ensure uniform axial temperature of the water-cooled beam body.

[0008] Furthermore, two baffles are fixedly disposed between the two side plates, located on both sides of the partition. Each baffle has a first flow channel between its top and the arched top plate, and a second flow channel between its bottom and the irregularly shaped bottom plate. The first flow channel is maintained between the baffle and the arched top plate, and the second flow channel is maintained between the baffle and the irregularly shaped bottom plate; these first and second flow channels constitute the flow gap. Forced cooling water forms a high-speed jet and vortex at the flow gap, enhancing local turbulence and improving the convective heat transfer coefficient.

[0009] Furthermore, both the inlet and outlet pipes are installed through the arched top plate. The two outlet pipes are located in the middle of the arched top plate, and the two inlet pipes are located at both ends of the arched top plate. The bottom ends of the two inlet pipes are located inside the two first chambers, and the bottom end of each inlet pipe is close to the irregular bottom plate.

[0010] Furthermore, hooks are fixedly installed at the bottom of the irregularly shaped base plate and at the lower part of the two side plates, and each hook is fixedly installed in the refractory layer of the side-blown furnace top.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The water-cooling device of this utility model has a smaller weight and lower cost compared to existing copper or cast steel water jackets, and it is also convenient to install and fix it in the refractory layer of the side-blown furnace top. The lower part of the water-cooled beam body is located in the refractory layer of the side-blown furnace top. The refractory layer isolates the water-cooled beam body from direct contact with the high-temperature dust-containing and sulfur-containing flue gas in the side-blown furnace, and also reduces the damage to the water-cooled beam body caused by low-temperature corrosion.

[0013] This utility model's water-cooling device features dual-sided water inlets, two water-cooling chambers (with a double-pass flow channel inside the water-cooled beam body), and dual water outlets. This ensures that the cooling water is fully overflowing and at a uniform temperature throughout the process, eliminating localized overheating and steam trapping within the water-cooled beam body. It achieves both rapid heat conduction and stable circulation of the low-temperature cooling water. The inclusion of baffles significantly increases the turbulence of the low-temperature cooling water, improving cooling efficiency and consequently reducing the temperature of the refractory lining at the top of the side-blown furnace. This also reduces the risk of scaling, extends the operating cycle, and lowers maintenance and replacement costs. Attached Figure Description

[0014] Figure 1 This is a front sectional view of a water cooling device for a side-blown furnace according to this utility model;

[0015] Figure 2 This is a side sectional view of the water cooling device of this utility model;

[0016] Figure 3 This is a top view of the water cooling device of this utility model;

[0017] The numbers in the attached diagram are:

[0018] 1. Water-cooled beam body; 11. Irregularly shaped bottom plate; 12. Arched top plate; 13. Side plate; 14. End plate; 15. Partition plate; 2. Side-blown furnace; 21. Refractory layer; 3. Baffle plate; 4. Water inlet pipe; 5. Water outlet pipe; 6. Hook nail. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-3As shown, a water-cooling device for a side-blown furnace includes a water-cooled beam body 1. The lower part of the water-cooled beam body 1 is fixedly installed in the refractory layer 21 on the top of the side-blown furnace 2. Specifically, both ends of the water-cooled beam body 1 rest on the furnace wall of the side-blown furnace 2. After the refractory layer 21 is poured, the lower part of the water-cooled beam body 1 is fixed to the refractory layer 21 on the top of the side-blown furnace 2 to prevent the water-cooled beam body 1 from tilting or overturning. The water-cooled beam body 1 has two water-cooled chambers inside, and each water-cooled chamber is fixedly equipped with... A flow-blocking plate 3 is provided, each of which divides the water-cooled chamber into a communicating first chamber and a second chamber. Two inlet pipes 4 and two outlet pipes 5 are fixedly installed on the top of the water-cooled beam body 1. The two inlet pipes 4 and two outlet pipes 5 are arranged symmetrically, with the two outlet pipes 5 located in the middle of the water-cooled beam body 1 and the two inlet pipes 4 located outside the two outlet pipes 5. Each inlet pipe 4 communicates with one of the first chambers, and each outlet pipe 5 communicates with one of the second chambers. It should be noted that multiple water-cooled beam bodies 1 can be installed as needed. The length of the water-cooled beam body 1 is adjusted according to the size of the side-blown furnace top 2 to achieve fixation within the refractory layer 21 of the side-blown furnace top 2. See also... Figure 3 Five water-cooled beam bodies 1 are installed in the refractory layer 21 on the top of the side-blown furnace 2. The lengths of the five water-cooled beam bodies 1 are not all the same.

[0021] The heat from the top of the side-blown furnace 2 is transferred to the refractory layer 21, and the refractory layer 21 then transfers the heat to the water-cooled beam body 1.

[0022] The water cooling process of the water cooling device: Low-temperature cooling water from both sides is simultaneously injected into the two water-cooled chambers of the water-cooled beam body 1 through two water inlet pipes 4. The low-temperature cooling water is injected into the two water inlet pipes 4 from both sides at the same time, eliminating the temperature gradient caused by water entering from one side and preventing local overheating and deformation of the water-cooled beam body 1.

[0023] Low-temperature cooling water first enters the first chamber, and then, due to the obstruction effect of the vertically set baffle plate 3, the cooling water forms a high-speed jet in the flow gap reserved in the baffle plate 3 (the flow gap connects the first chamber and the second chamber). The cooling water then enters the second chamber, where the turbulence of the cooling water is greatly increased, the thermal boundary layer is continuously destroyed and heat transfer is enhanced, and finally the cooling water is discharged through two outlet pipes 5, completing one cooling cycle.

[0024] Among them, the baffle plate 3 can change the flow rate and direction of the cooling water multiple times, enhance the degree of turbulence, and prolong the heat exchange time; at the same time, it plays a role in equalizing pressure and prevents the cooling water from being short-circuited and discharged directly from the outlet pipe 5.

[0025] In this embodiment, the water-cooled beam body 1 is lighter and cheaper than existing copper or cast steel water jackets, and is also easier to install and fix in the refractory layer 21 on the top of the side-blown furnace 2. The lower part of the water-cooled beam body 1 is located in the refractory layer 21 on the top of the side-blown furnace 2. The refractory layer 21 isolates the water-cooled beam body 1 from direct contact with the high-temperature dust-containing and sulfur-containing flue gas in the furnace of the side-blown furnace 2, and also reduces the damage to the water-cooled beam body 1 caused by low-temperature corrosion.

[0026] The water-cooling device in this embodiment features dual-sided water inlets, two water-cooling chambers (with a double-pass flow channel inside the water-cooled beam body 1), and dual water outlets. This ensures that the cooling water is fully overflowing and at a uniform temperature throughout the process, eliminating localized overheating and steam trapping in the water-cooled beam body 1. This achieves both rapid heat conduction and stable circulation of the low-temperature cooling water. The baffle plate 3 significantly increases the turbulence of the low-temperature cooling water, improving cooling efficiency and consequently reducing the temperature of the refractory layer 21 at the top of the side-blown furnace 2. This also reduces the risk of scaling, extends the operating cycle, and lowers maintenance and replacement costs.

[0027] In one possible implementation, the water-cooled beam body 1 includes an irregularly shaped bottom plate 11, an arched top plate 12, two side plates 13, and an end plate 14. The bottoms of the two side plates 13 are fixedly mounted on the irregularly shaped bottom plate 11, and the distance between the two side plates 13 is less than the width of the irregularly shaped bottom plate 11. The arched top plate 12 is fixedly mounted on the top of the two side plates 13. Each end plate 14 is fixedly mounted between the ends of the irregularly shaped bottom plate 11, the arched top plate 12, and the two side plates 13. The lower parts of the irregularly shaped bottom plate 11, the two side plates 13, and the end plate 14 are fixedly mounted in the refractory layer 21 of the top of the side-blown furnace 2. The upper parts of the arched top plate 11, the two side plates 13, and the end plate 14 are located above the refractory layer 21 of the top of the side-blown furnace 2. The water-cooled beam body 1 is formed by welding an irregularly shaped bottom plate 11, an arched top plate 12, two side plates 13, and an end plate 14 into a sealed box shape, which serves as both a pressure-bearing shell and a complete flow channel for cooling water. The irregularly shaped bottom plate 11, the arched top plate 12, the two side plates 13, and the end plate 14 are all made of steel.

[0028] The distance between the two side plates 13 is less than the width of the irregular bottom plate 11. The irregular bottom plate 11 and the two side plates 13 form a wing-shaped extended heat exchange surface, increasing the effective contact area with the refractory layer 21. The irregular bottom plate 11 and the two side plates 13 absorb heat from the refractory layer 21, thereby improving cooling efficiency and reducing heat flux density. The water-cooled beam body 1, through the synergy of the wing-shaped extended heat exchange surface and the flow gap of the baffle plate 3, expands the heat absorption area and enhances turbulence, significantly reducing the temperature of the furnace top refractory layer 21. After the irregular bottom plate 11 and the two side plates 13 are welded and fixed, the weld joint is effectively shielded to avoid performance degradation of the water-cooling device caused by welding defects or concentrated welding thermal stress. Even if the refractory layer 21 at the bottom of the water-cooling device is completely burned out, the service life of the water-cooling device can be effectively extended. The weld joints of the arched top plate 12 and the two side plates 13 are also effectively shielded.

[0029] The arched top plate 12 is arched. The arched top plate 12 uses the arch structure to convert thermal expansion into tangential compressive stress, offsetting axial thermal stress and preventing the weld of the water-cooled beam body 1 from cracking.

[0030] As one possible implementation, a partition 15 is fixedly installed at the middle position of the irregularly shaped base plate 11, the arched top plate 12, and the two side plates 13. The partition 15 divides the interior of the water-cooled beam body 1 into two water-cooled chambers. The partition 15 is centrally located and divides the interior of the water-cooled beam body 1 into two water-cooled chambers (the interior of the water-cooled beam body 1 has a double-pass channel). The cooling water achieves full coverage of the two water-cooled chambers, eliminating dead zones, and shortening the cooling water return path to ensure uniform axial temperature of the water-cooled beam body 1.

[0031] Low-temperature cooling water first enters the first chamber, and then, due to the obstruction effect of the vertically set baffle plate 3, the cooling water forms a high-speed jet in the flow gap reserved in the baffle plate 3. The cooling water then enters the second chamber. After reaching the baffle plate 15, the cooling water turns back and flows in the opposite direction along the other side (the baffle plate 15 achieves full coverage of the water-cooled chamber without dead zones). Finally, the cooling water floats to the outlet pipe 5 and is discharged, completing one cooling cycle.

[0032] In one possible implementation, two flow-blocking plates 3 are welded and fixed between two side plates 13, with the flow-blocking plates 3 arranged perpendicular to the water flow direction. The two flow-blocking plates 3 are located on both sides of the partition plate 15. A first flow channel is provided between the top of each flow-blocking plate 3 and the arched top plate 12, and a second flow channel is provided between the bottom of each flow-blocking plate 3 and the irregularly shaped bottom plate 11. The first flow channel is maintained between the flow-blocking plate 3 and the arched top plate 12, and the second flow channel is maintained between the flow-blocking plate 3 and the irregularly shaped bottom plate 11; the first and second flow channels constitute the flow gap. Forced cooling water forms a high-speed jet and vortex at the flow gap, enhancing local turbulence and improving the convective heat transfer coefficient. Preferably, the width of the first and second flow channels is generally larger than the size of the scale layer, which can effectively prevent clogging after scale formation.

[0033] In one possible implementation, both inlet pipes 4 and outlet pipes 5 are installed through the arched top plate 12. The two outlet pipes 5 are located in the middle of the arched top plate 12, and the two inlet pipes 4 are located at both ends of the arched top plate 12. The bottom ends of the two inlet pipes 4 are located inside the two first chambers, and the bottom end of each inlet pipe 4 is close to the irregularly shaped bottom plate 11. The arched top plate 12 is arched. The highest point of the arch of the arched top plate 12 naturally becomes the optimal position for water outlet. Therefore, the two outlet pipes 5 are located in the middle of the arched top plate 12 and are symmetrically arranged on both sides of the partition plate 15. This fully utilizes the hot water buoyancy effect, allowing the two water-cooled chambers and the outlet pipes 5 to achieve full overflow drainage, preventing the accumulation of air pockets that could lead to localized dry burning, and ensuring that the cooling water continuously and stably removes heat.

[0034] As one possible implementation, hooks 6 are fixedly installed at the bottom of the irregularly shaped base plate 11 and at the lower part of the two side plates 13, with each hook 6 fixedly installed in the refractory layer 21 of the side-blown furnace 2. Multiple hooks 6 can be installed as needed. The hooks 6 are U-shaped. Preferably, the hooks 6 at the bottom of the irregularly shaped base plate 11 are vertically arranged, while the hooks 6 at the lower part of the two side plates 13 are horizontally arranged. The hooks 6 form a mechanical interlock with the refractory layer 21, significantly increasing the interfacial shear strength and preventing the refractory layer 21 lining from peeling off entirely under the scouring of high-temperature airflow. Simultaneously, the hooks 6 conduct heat, forming micro-heat dissipation channels (the hooks 6 transfer heat from the refractory layer 21 to the water-cooled beam body 1), further reducing the internal temperature gradient of the refractory layer 21 and extending the service life of the refractory layer 21 lining. During operation, the water-cooling device only needs to monitor the return water temperature. The entire water-cooling device can maintain a low shell temperature, low stress, and zero leakage at the top of the side-blown furnace 2 for a long period, achieving safe and long-term operation of the side-blown furnace 2 top.

[0035] The water cooling process of the water-cooling device: Low-temperature cooling water from both sides is simultaneously injected into the two water-cooled chambers of the water-cooled beam body 1 through two inlet pipes 4. The simultaneous injection of low-temperature cooling water from both sides into the two inlet pipes 4 eliminates the temperature gradient caused by water entering from one side, preventing local overheating and deformation of the water-cooled beam body 1. The low-temperature cooling water first enters the first chamber, and then, due to the obstruction effect of the vertically set baffle plate 3, the cooling water forms a high-speed jet in the flow gap reserved in the baffle plate 3, and then enters the second chamber. After reaching the partition plate 15, the cooling water turns back and flows in the opposite direction along the other side, and finally the cooling water is discharged through two outlet pipes 5, completing one cooling cycle.

[0036] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A water-cooling device for a side-blown furnace, characterized in that, The system includes a water-cooled beam body (1), the lower part of which is fixedly installed in the refractory layer (21) on the top of the side-blown furnace (2); the water-cooled beam body (1) has two water-cooled chambers inside, each of which is fixedly equipped with a baffle plate (3), each of which divides the water-cooled chamber into a first chamber and a second chamber that are connected; the top of the water-cooled beam body (1) is fixedly equipped with two inlet pipes (4) and two outlet pipes (5), the two outlet pipes (5) are located in the middle of the water-cooled beam body (1), the two inlet pipes (4) are located outside the two outlet pipes (5), each inlet pipe (4) is connected to a first chamber, and each outlet pipe (5) is connected to a second chamber.

2. The water-cooling device for the side-blown furnace according to claim 1, characterized in that, The water-cooled beam body (1) includes an irregular bottom plate (11), an arched top plate (12), two side plates (13) and an end plate (14). The bottom of the two side plates (13) is fixedly set on the irregular bottom plate (11). The distance between the two side plates (13) is less than the width of the irregular bottom plate (11). The arched top plate (12) is fixedly set on the top of the two side plates (13). Each end plate (14) is fixedly set between the ends of the irregular bottom plate (11), the arched top plate (12) and the two side plates (13). The lower part of the irregular bottom plate (11) and the two side plates (13) and the end plate (14) is fixedly set in the refractory layer (21) of the side-blown furnace (2). The upper part of the arched top plate (12) and the two side plates (13) and the end plate (14) is located above the refractory layer (21) of the side-blown furnace (2).

3. The water-cooling device for the side-blown furnace according to claim 2, characterized in that, A partition (15) is fixedly installed in the middle of the irregular bottom plate (11), the arched top plate (12) and the two side plates (13), and the partition (15) divides the interior of the water-cooled beam body (1) into two water-cooled chambers.

4. The water-cooling device for the side-blown furnace according to claim 3, characterized in that, Two flow-blocking plates (3) are fixedly installed between two side plates (13). The two flow-blocking plates (3) are located on both sides of the partition plate (15). A first flow channel is left between the top of each flow-blocking plate (3) and the arched top plate (12), and a second flow channel is left between the bottom of each flow-blocking plate (3) and the irregular bottom plate (11).

5. The water-cooling device for the side-blown furnace according to claim 4, characterized in that, Both of the water inlet pipes (4) and water outlet pipes (5) are installed through the arched top plate (12). The two water outlet pipes (5) are located in the middle of the arched top plate (12). The two water inlet pipes (4) are located at both ends of the arched top plate (12). The bottom ends of the two water inlet pipes (4) are located inside the two first chambers respectively. The bottom end of each water inlet pipe (4) is close to the irregular bottom plate (11).

6. The water-cooling device for the side-blown furnace according to claim 2, characterized in that, Hooks (6) are fixedly installed at the bottom of the irregular bottom plate (11) and the lower part of the two side plates (13), and each hook (6) is fixedly installed in the refractory layer (21) of the top of the side-blown furnace (2).

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