Blast furnace soft clean ring water cooling system

Abstract

The utility model discloses a blast furnace soft pure ring water cooling system belongs to smelting equipment cooling technical field. Include: spray cooling system, is formed by spray hot pool and spray cold pool, and the spray water of spray cold pool is used to carry out heat exchange to the air -cooling pipe of soft water system, and the spray water after heat exchange is returned to spray cold pool after cooling through first cooling tower, forms spray water closed loop, pure ring water system, including pure ring water pool, and the pure ring water in pure ring water pool supplies blast furnace user cooling use, and the pure ring water of temperature rise after use is returned to first cooling tower and is cooled through backwater pipeline again, and is returned to pure ring water pool through drain pipeline, forms pure ring water independent loop. Cool the soft water system through spray cooling system, avoid the pure ring water pool to maintain at higher temperature for a long time because of soft water temperature is higher, can better satisfy the cooling requirement of soft water system, TRT, direct current furnace roof and other key equipment, guarantees relevant equipment can keep normal operation for a long time.

Description

Technical Field

[0001] This utility model belongs to the field of cooling technology for smelting equipment, and specifically relates to a soft and clean circulating water cooling system for blast furnaces. Background Technology

[0002] The main function of the spray water pump unit is to pump the cooler spray water to the air cooler, where it indirectly sprays water to cool the soft water inside the copper tubes, ensuring that the soft water temperature meets user requirements. This system is crucial for cooling processes in industries such as steel production, playing a key role especially in the operation of blast furnace-related equipment.

[0003] However, in actual operation, due to the high initial temperature of the cooled soft water, the water temperature after spraying and recirculation also remains at a high level (above 35 degrees Celsius). This causes the overall water temperature of the clean circulation pool to be in an undesirable high-temperature state for a long time, making it difficult to meet the cooling requirements of key equipment such as the soft water system, TRT (blast furnace gas pressure turbine power generation unit), and DC furnace top. This high-temperature environment directly affects the cooling efficiency of the system and becomes an important bottleneck restricting the normal operation of the blast furnace and related equipment.

[0004] To address this issue, the current main approach is to increase the discharge volume of the circulating water tank and replenish it with low-temperature fire-fighting water to lower the tank temperature. However, this method has significant limitations: firstly, while it can alleviate the problem of excessively high water temperature in the short term, the effect is not significant; secondly, frequent discharge and replenishment operations lead to substantial chemical loss and water waste, increasing operating costs. Furthermore, the existing adjustment methods struggle to precisely control the water temperature, failing to fully meet the requirements for stable blast furnace operation and further limiting the overall system efficiency.

[0005] The aforementioned problems not only lead to resource waste and increased costs, but also seriously affect the operational stability of blast furnaces and related equipment. Specifically, insufficient cooling capacity can cause equipment overheating, which in turn leads to a decline in equipment performance or even failure, ultimately restricting the production efficiency of the blast furnace. At the same time, insufficient water temperature control precision also greatly reduces the reliability of the entire cooling system, making it difficult to meet the requirements of efficient and stable operation of modern blast furnaces.

[0006] In summary, existing spray water cooling systems face the problem of insufficient cooling capacity due to excessively high water temperatures, and while existing solutions improve cooling performance, they also bring additional costs and resource waste.

[0007] Therefore, it is urgent to find more effective measures to improve the cooling performance of the system, reduce unnecessary resource consumption, and improve the accuracy of water temperature control in order to support the efficient and stable operation of the blast furnace and related equipment. Utility Model Content

[0008] This invention addresses the aforementioned problems in the existing technology by proposing a blast furnace soft and clean circulating water cooling system that can improve the cooling effect of blast furnace clean circulating water and soft water.

[0009] This utility model can be achieved through the following technical solutions:

[0010] A blast furnace soft and clean circulating water cooling system, comprising:

[0011] The spray cooling system consists of a spray hot water tank and a spray cold water tank. The spray water in the spray cold water tank is used to exchange heat with the air-cooled pipes of the soft water system. After heat exchange, the spray water is cooled by the first cooling tower and then flows back to the spray cold water tank, forming a closed loop of spray water.

[0012] The clean circulating water system includes a clean circulating water tank, in which the clean circulating water is used for cooling by blast furnace users. After use, the heated clean circulating water flows back to the first cooling tower through the return water pipeline for cooling, and then is discharged back to the clean circulating water tank through the drainage pipeline, forming an independent clean circulating water loop.

[0013] The spray cooling system and the clean circulating water system share the same first cooling tower, and the spray water and the clean circulating water are physically isolated within the first cooling tower.

[0014] As a further improvement of this utility model, the first cooling tower is equipped with a water collection tray, which, together with the spray hot water tank, forms two independent water storage areas.

[0015] After being used for cooling by blast furnace users, the heated clean circulating water flows back to the water collection pan through the return water pipeline.

[0016] After the air-cooled pipe is cooled, the heated spray water flows into the spray hot water tank.

[0017] As a further improvement of this utility model, the first cooling tower is configured as a mechanical exhaust structure and uses air cooling to cool the net circulating water in the water collection pan and the spray water in the spray hot water pool.

[0018] As a further improvement of this utility model, a partition plate is provided between the spray hot water pool, the spray cold water pool, and the clean circulating water pool.

[0019] As a further improvement of this utility model, a second cooling tower is provided in the spray cooling water pool, and the spray water in the spray cooling water pool is cooled by the second cooling tower.

[0020] As a further improvement of this utility model, the return water pipeline includes a high-pressure return water pipe and a low-pressure return water pipe, which respectively correspond to the net circulating water return water of different pressure sections of the blast furnace.

[0021] As a further improvement of this utility model, the spray hot water tank is pumped to the first cooling tower by an upper tower pump for cooling.

[0022] As a further improvement of this utility model, the clean circulating water tank delivers clean circulating water to the blast furnace user through a water supply pump.

[0023] As a further improvement of this utility model, the clean circulating water tank is also connected to an external slag flushing water circulation system in sequence through a first side filter water pump and a second side filter water pump.

[0024] As a further improvement of this utility model, the filtration accuracy of the second side filter water pump is greater than that of the first side filter water pump, and the second side filter water pump is also connected to the clean circulation water tank through a return pipeline.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Improved cooling efficiency: The design of the spray cooling system and the clean circulating water system with independent circulation but sharing a cooling tower ensures the efficient operation of each system. The spray cooling system cools the soft water system, effectively reducing the temperature of the clean circulating water pool. At the same time, it meets the cooling requirements of key equipment such as the soft water system, TRT (blast furnace gas pressure turbine power generation unit), and DC furnace top. This is crucial for maintaining the normal operation of the blast furnace and related equipment, helping to prevent equipment failures caused by overheating and ensuring the continuity of production.

[0027] 2. Reduced resource waste: Since the spray water and the circulating water are physically isolated in the cooling tower, cross-contamination is avoided, and the loss of chemicals and water resources caused by frequent sewage discharge and water replenishment are reduced. This not only reduces operating costs, but is also more environmentally friendly.

[0028] 3. Precise water temperature control: The improved system can control the water temperature more precisely to meet the specific needs of different users. In particular, it provides better support for key equipment that is sensitive to water temperature, such as TRT and DC furnace top, thereby improving the operating efficiency and stability of the entire blast furnace system.

[0029] 4. Cost savings: By avoiding increased sewage discharge into the clean circulation tank and eliminating the need to replenish low-temperature fire-fighting water to lower the tank temperature, chemical and water resources are greatly saved, operating costs are reduced, and environmental impact is mitigated. Attached Figure Description

[0030] Fig. 1This is a process flow diagram of the blast furnace soft and clean circulating water cooling system of this utility model;

[0031] Fig. 2 This is a schematic diagram of the layout of the blast furnace soft and clean circulating water cooling system of this utility model;

[0032] Fig. 3 This is a process flow diagram of the existing blast furnace soft and clean circulating water cooling system.

[0033] In the diagram, 100 is the hot water spray tank; 110 is the first cooling tower; and 120 is the upper tower pump.

[0034] 200. Spray cooling water tank; 210. Spray water pump; 220. Air cooler; 230. Second cooling tower;

[0035] 300. Clean circulating water tank; 310. High-pressure return water pipe; 320. Low-pressure return water pipe; 330. Drainage pipeline; 340. DC furnace top water supply pump; 350. TRT water supply pump; 360. First bypass filter pump; 370. Second bypass filter pump;

[0036] 400. Divider. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0038] like Figs. 1-3 As shown, this utility model provides a blast furnace soft and clean circulating water cooling system, comprising:

[0039] Spray cooling system: This system consists of a hot water spray tank 100 and a cold water spray tank 200. The low-temperature spray water in the cold water spray tank 200 is pumped to the air cooler 220 by the spray water pump 210, where it undergoes indirect heat exchange to cool the high-temperature soft water in the air cooler tubes. After the heat exchange, the heated spray water flows back to the first cooling tower 110 through a dedicated pipeline, and after cooling, it returns to the cold water spray tank 200, forming a closed spray water circulation system.

[0040] Clean water circulation system: This system includes a specially designed clean water circulation tank 300 for storing and supplying the clean water required by blast furnace users. After use, the clean water absorbs heat and its temperature rises. It is then returned to the first cooling tower 110 for cooling through the return water pipeline. After cooling, it is discharged back to the clean water circulation tank 300 through the drainage pipeline 330, forming an independent clean water circulation system.

[0041] Shared cooling tower design: The unique feature is that although the spray cooling system and the clean circulating water system each form independent water circulation, they share the same primary cooling tower 110. Inside the cooling tower, the spray water and the clean circulating water maintain strict physical isolation, ensuring that the water quality of the two systems does not affect each other, while simultaneously achieving equipment sharing and space optimization.

[0042] It should be noted that in this embodiment, the spray cooling system and the clean circulating water system are clearly distinguished: the spray cooling system is used to cool the air-cooled pipes of the soft water system, while the clean circulating water system is dedicated to providing cooling water for blast furnace users.

[0043] Therefore, the water temperature in the circulating water tank 300 does not need to exchange heat with the air-cooled pipes in the soft water system. As a result, the circulating water tank 300 will not be kept at a high temperature for a long time due to the high temperature of the soft water. This design can better meet the cooling requirements of key equipment such as the soft water system, TRT (blast furnace gas pressure turbine power generation unit), and DC furnace top, and ensure that the relevant equipment can maintain normal operation for a long time.

[0044] According to actual test results, if the existing technology is used to cool the air-cooled pipes by circulating water, the temperature of the circulating water tank 300 will be maintained above 35°C for a long time. However, with the improved design in this embodiment, the temperature of the circulating water tank 300 can be reduced to about 28°C, which is 7°C lower than the original system. This fully meets the normal cooling requirements of user equipment such as TRT (blast furnace gas residual pressure turbine power generation unit) and DC furnace top.

[0045] In addition, there is no need to increase the sewage discharge of the 300-cell clean circulation water tank or add low-temperature fire-fighting water to lower the tank temperature, thus saving chemical and water resources and reducing operating costs.

[0046] Overall, the blast furnace soft and clean circulating water cooling system provided in this embodiment has at least the following advantages:

[0047] 1. Improved cooling efficiency: The design of the spray cooling system and the clean circulating water system with independent circulation but sharing a cooling tower ensures the efficient operation of each system. The spray cooling system cools the soft water system, effectively reducing the temperature of the clean circulating water pool by 300°C. At the same time, it meets the cooling requirements of key equipment such as the soft water system, TRT (blast furnace gas pressure turbine power generation unit), and DC furnace top. This is crucial for maintaining the normal operation of the blast furnace and related equipment, helping to prevent equipment failures caused by overheating and ensuring the continuity of production.

[0048] 2. Reduced resource waste: Since the spray water and the circulating water are physically isolated in the cooling tower, cross-contamination is avoided, and the loss of chemicals and water resources caused by frequent sewage discharge and water replenishment are reduced. This not only reduces operating costs, but is also more environmentally friendly.

[0049] 3. Precise water temperature control: The improved system can control the water temperature more precisely to meet the specific needs of different users. In particular, it provides better support for key equipment that is sensitive to water temperature, such as TRT and DC furnace top, thereby improving the operating efficiency and stability of the entire blast furnace system.

[0050] 4. Cost savings: By avoiding increasing the sewage discharge of the 300-ton clean circulation water tank and eliminating the need to replenish low-temperature fire-fighting water to lower the tank temperature, chemical and water resources are greatly saved, operating costs are reduced, and the environmental impact is also mitigated.

[0051] Preferably, the first cooling tower 110 is equipped with a water collection tray (not shown in the figure), which together with the spray hot water pool 100 forms two independent water storage areas, as specifically designed below:

[0052] 1. Water collection pan and net circulating water return: After cooling the blast furnace, the heated net circulating water flows directly back to the water collection pan of the first cooling tower 110 through the return water pipeline. The water collection pan serves as a temporary storage area for the net circulating water, ensuring that the net circulating water can be effectively cooled here.

[0053] 2. Spray hot water tank 100 and spray water return: After cooling the air-cooled pipes, the heated spray water flows into the spray hot water tank 100. The spray hot water tank 100 is specifically used to collect the spray water after heat exchange and transport it to the upper tower pump 120 so that it can be sent to the first cooling tower 110 for cooling treatment.

[0054] The design of the water collection tray allows the circulating water to be fully cooled in an independent space, reducing the risk of cross-contamination with other systems and improving cooling efficiency. The spray hot water tank 100 is specifically designed to collect and pre-treat the heated spray water, ensuring that it has been initially classified and managed before entering the cooling tower, which helps to improve the effectiveness of subsequent cooling steps.

[0055] Preferably, the first cooling tower 110 is configured with a mechanical exhaust structure, which uses a fan to increase the airflow speed to enhance cooling efficiency. Although the spray water and the clean circulating water are physically isolated inside the cooling tower, they can both be effectively cooled by air cooling. The clean circulating water in the water collection pan and the spray water in the spray hot water pool 100 are cooled in their respective areas, ensuring that the two water sources do not mix and that each obtains a highly efficient cooling effect.

[0056] Preferably, a partition plate 400 is provided between the spray hot water tank 100, the spray cold water tank 200, and the clean circulating water tank 300 to ensure physical isolation between the three tanks, so that each tank can focus on its specific function—the spray cold water tank 200 provides low-temperature spray water for cooling air-cooled pipes; the spray hot water tank 100 receives and stores the heated spray water, ready to be sent to the first cooling tower 110 for cooling; and the clean circulating water tank 300 is responsible for providing the cooling water required by the blast furnace user and recycling the heated clean circulating water after use for further treatment.

[0057] Preferably, a second cooling tower 230 is provided in the spray cooling water tank 200, and the second cooling tower 230 directly serves the spray cooling water tank 200 to ensure that the spray water in the spray cooling water tank 200 can be maintained in a low and stable temperature range.

[0058] Specifically, the spray water, after being initially cooled by the first cooling tower 110, enters the spray cold water pool 200. If the water temperature is still higher than the set value at this time, it will be cooled again by the second cooling tower 230. This dual-stage cooling mechanism can more accurately control the temperature of the spray water and ensure that it is always in the best working condition to meet the cooling needs of the blast furnace and related equipment.

[0059] Preferably, the return water pipeline includes a high-pressure return water pipe 310 and a low-pressure return water pipe 320, which correspond to the net circulating water return water of different pressure sections of the blast furnace. By distinguishing between the high-pressure return water pipe 310 and the low-pressure return water pipe 320, the entire return water system can be optimized according to different pressure requirements, so that each part can operate under its best conditions, thereby improving the overall efficiency and safety of the system.

[0060] Preferably, the spray hot water tank 100 is pumped to the first cooling tower 110 by the upper tower pump 120 for cooling.

[0061] Preferably, the clean circulating water tank 300 delivers clean circulating water to the corresponding blast furnace users through the DC furnace top water supply pump 340 and the TRT water supply pump 350, respectively.

[0062] Preferably, the clean water tank 300 is also connected to an external slag flushing water circulation system via a first side-filter pump 360 and a second side-filter pump 370 in sequence. The filtration accuracy of the second side-filter pump 370 is greater than that of the first side-filter pump 360.

[0063] The first side filter pump 360 is mainly used to remove larger particles of impurities, ensuring that the water flow will not cause blockage or damage when it enters the subsequent treatment stage. The water that has been initially filtered by the first side filter pump 360 continues to be filtered more finely by the second side filter pump 370.

[0064] The second bypass water pump 370 has higher filtration precision, effectively removing tiny particles and suspended solids, further purifying the water.

[0065] By setting up a two-stage filtration system (first side filter pump 360 and second side filter pump 370), impurities in the water can be gradually removed, from large particles to tiny suspended solids, ensuring that the final output water meets a high purity standard. This is crucial for extending the service life of the equipment and reducing the frequency of maintenance.

[0066] In addition, to ensure the flexibility and stability of the system, the second bypass water pump 370 is also equipped with a return pipeline that is directly connected to the clean circulation water tank 300. This means that in certain situations (such as when the sludge flushing water system does not require additional water supply), the finely filtered water can be returned to the clean circulation water tank 300, avoiding resource waste and maintaining the balance of the system.

[0067] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0068] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0069] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0071] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A soft clean ring water cooling system for a blast furnace, characterized by, The application relates to a cooling system for a blast furnace, which comprises a spray cooling system and a clean water system. The spray cooling system comprises a spray hot water pool and a spray cold water pool, wherein the spray water in the spray cold water pool is used for heat exchange with the air cooling pipe of a soft water system, the spray water after heat exchange is cooled by a first cooling tower and then flows back to the spray cold water pool, forming a closed spray water loop. The clean water system comprises a clean water pool, wherein the clean water in the clean water pool is used for cooling of the blast furnace, the clean water after temperature rise flows back to the first cooling tower through a backwater pipeline and then is discharged to the clean water pool through a drainage pipeline, forming an independent clean water loop. The spray cooling system and the clean water system share the first cooling tower, and the spray water and the clean water are physically isolated in the first cooling tower.

2. A soft clean ring water cooling system for a blast furnace as claimed in claim 1 wherein, The first cooling tower is provided with a water collecting disc, and the water collecting disc and the spray hot water pool form two independent water storage areas.

3. A soft clean ring water cooling system for a blast furnace as claimed in claim 2 wherein, The clean water after cooling of the blast furnace flows back to the water collecting disc through the backwater pipeline. The spray water after cooling of the air cooling pipe flows into the spray hot water pool.

4. A soft clean ring water cooling system for a blast furnace as claimed in claim 2 wherein, The first cooling tower is in a mechanical air draft structure and cools the clean water in the water collecting disc and the spray water in the spray hot water pool by air cooling.

5. A soft pure ring water cooling system for blast furnace according to claim 1, wherein, The spray hot water pool, the spray cold water pool and the clean water pool are provided with a partition plate.

6. A soft pure ring water cooling system for blast furnace according to claim 1, wherein, The spray cold water pool is provided with a second cooling tower for cooling the spray water in the spray cold water pool.

7. A soft pure ring water cooling system for blast furnace according to claim 1, wherein, The backwater pipeline comprises a high-pressure backwater pipeline and a low-pressure backwater pipeline, which are respectively used for backflow of the clean water of different pressure sections of the blast furnace.

8. A soft pure ring water cooling system for blast furnace according to claim 1, wherein, The clean water pool is connected with the blast furnace user through a water supply pump.

9. A soft pure ring water cooling system for blast furnace according to claim 1, wherein, The clean water pool is further connected with an external slag flushing water circulation system through a first bypass filter water pump and a second bypass filter water pump.

10. A soft clean ring water cooling system for a blast furnace as claimed in claim 9 wherein, The filtering precision of the second bypass filter water pump is higher than that of the first bypass filter water pump, and the second bypass filter water pump is further connected with the clean water pool through a backflow pipeline.

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