Coiler cooling device

Abstract

This invention provides a steel coil cooling device. It includes a circulating water tank, a water supply pipe, a return water trench, a spraying mechanism, a cooling circulation pipeline, and a cooling tower. The spraying mechanism is connected to the circulating water tank via the water supply pipe and sprays cooling water from the circulating water tank onto the steel coils to be cooled in the steel coil stacking tank. The return water trench connects the steel coil stacking tank and the circulating water tank, and returns the sprayed cooling water collected in the steel coil stacking tank to the circulating water tank. The first end of the cooling circulation pipeline is connected to the cooling circulation pipeline, and after flowing through the cooling tower, it returns to the circulating water tank through the second end. The cooling tower is used to cool the cooling water in the circulating water tank. After being cooled by the cooling tower through the cooling circulation pipeline, the water returns to the circulating water tank. The cooling water is recycled within the system, significantly reducing the amount of water discharged to the outside, greatly reducing water pollution and water waste, and improving water resource utilization.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled coil cooling, and more particularly to a steel coil cooling device. Background Technology

[0002] In the steel production process, hot-rolled coils need to be transferred from the hot rolling process to the cold rolling raw material warehouse for storage, in order to proceed with subsequent cold rolling pickling or pickling-rolling combined production. However, hot-rolled coils typically have a high temperature after production (surface temperature generally between 200-400℃), while cold rolling pickling lines or pickling-rolling combined production lines have strict requirements on the surface temperature of the strip steel, which must be controlled below 50℃. Otherwise, the polyurethane-coated rubber rollers on the pickling line or pickling-rolling combined production line will be scalded, leading to production interruption and equipment damage.

[0003] To accelerate the cooling rate of hot-rolled coils, some steel mills use large amounts of cooling water. While this method can improve cooling efficiency to some extent, it also presents several problems. The direct discharge of large quantities of high-temperature cooling water into storm drains not only causes thermal pollution of water bodies but also leads to water waste and extremely low water utilization. Utility Model Content

[0004] The main purpose of this utility model is to provide a steel coil cooling device to solve the technical problem of water pollution and water waste caused by the direct discharge of high-temperature cooling water.

[0005] To achieve the above objectives, this utility model provides a steel coil cooling device, including a circulating water tank, a water supply pipeline, a return water trench, a spray mechanism, a cooling circulation pipeline, and a cooling tower.

[0006] The spraying mechanism is connected to the circulating water pool through the water supply pipe, and is used to spray the cooling water from the circulating water pool onto the steel coils to be cooled in the steel coil stacking pool.

[0007] The return water trench connects the steel coil stacking pool and the circulating water pool, and is used to return the sprayed cooling water collected in the steel coil stacking pool to the circulating water pool.

[0008] The first end of the cooling circulation pipeline is connected to the cooling circulation pipeline, and after flowing through the cooling tower, it returns to the circulating water pool through the second end. The cooling tower is used to cool and lower the temperature of the cooling water in the circulating water pool.

[0009] According to an embodiment of this application, the spraying mechanism includes multiple spray pipes arranged at equal intervals, and the spray pipes are provided with multiple sets of spray nozzles arranged at equal intervals along the axial direction.

[0010] According to an embodiment of this application, each set of spray nozzles includes a plurality of spray nozzles distributed at different angles along the circumference of the spray pipe.

[0011] According to an embodiment of this application, the cooling tower is designed to have a cooling capacity of 0.4-0.8 times the spray water volume of the spraying mechanism.

[0012] According to an embodiment of this application, the cooling tower is a counter-flow cooling tower.

[0013] According to an embodiment of this application, it further includes a level gauge and a water replenishment mechanism. The circulating water tank is connected to an external water storage tank or water replenishment pipeline through the water replenishment mechanism. The level gauge is installed in the circulating water tank and controls the start and stop of the water replenishment mechanism.

[0014] According to an embodiment of this application, the circulating water tank is provided with a step for the lowest water level, and the level gauge is installed on the step.

[0015] According to an embodiment of this application, the first end of the cooling circulation pipeline includes two parallel branch pipes, each branch pipe having a corresponding circulation pump.

[0016] According to an embodiment of this application, it also includes an overflow pipe, which is connected to the circulating water pool and an external rainwater ditch.

[0017] According to an embodiment of this application, it further includes a water collection tank and a sewage treatment mechanism. The water collection tank is connected to the rainwater ditch and is used to collect rainwater and sewage therein. The sewage treatment mechanism is connected to the water collection tank and is used to treat the mixed water formed by rainwater and sewage.

[0018] In the aforementioned steel coil cooling device, cooling water is supplied through a water supply pipe and sprayed by a spray mechanism to cool the steel coil. The cooled water then returns to the circulating water tank via a return pipe trench. After this process, the temperature of the cooling water increases, and it is then transported to a cooling tower through a cooling circulation pipeline for further cooling before returning to the circulating water tank. Thus, the combined effect of the spray mechanism and the cooling tower achieves highly efficient cooling. The cooling water is recycled within the system, significantly reducing the amount of water discharged externally, thereby greatly reducing water pollution and water waste, and improving water resource utilization. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the steel coil cooling device according to one embodiment of this application in use;

[0021] Figure 2 This is a schematic diagram of the spraying mechanism in use according to one embodiment of this application.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Attached image description:

[0024] 100. Circulating water tank; 200. Water supply pipeline; 300. Return water trench; 400. Spraying mechanism; 410. Spray pipe; 420. Spray nozzle; 500. Cooling circulation pipeline; 600. Cooling tower; 510. Circulating pump; 520. Water replenishment mechanism; 700. Overflow pipe. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of this utility model 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.

[0027] Furthermore, in this utility model, descriptions involving "first," "second," etc., are 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 with "first" or "second" may explicitly or implicitly include at least one of those features.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. 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 scope of protection claimed by this utility model.

[0029] See Figure 1This utility model provides a steel coil cooling device, including a circulating water tank 100, a water supply pipe 200, a return water trench 300, a spraying mechanism 400, a cooling circulation pipeline 500, and a cooling tower 600. The spraying mechanism 400 is connected to the circulating water tank 100 via the water supply pipe 200, and is used to spray cooling water from the circulating water tank 100 onto the steel coils to be cooled in the steel coil stacking tank. The return water trench 300 connects the steel coil stacking tank and the circulating water tank 100, and is used to return the sprayed cooling water collected in the steel coil stacking tank to the circulating water tank 100. The first end of the cooling circulation pipeline 500 is connected to the cooling circulation pipeline 500, flows through the cooling tower 600, and then returns to the circulating water tank 100 through the second end. The cooling tower 600 is used to cool and lower the temperature of the cooling water in the circulating water tank 100.

[0030] Steel coils are placed in the raw material storage area, i.e., the steel coil stacking pool. A spray system 400 is arranged in the steel coil stacking pool. A water supply pipe 200 connects to a circulating water pool 100 to supply water to the spray system 400. A water pump is installed on the water supply pipe 200 to regulate the water supply volume and speed. The cooling water sprayed by the spray system 400 cools the steel coils. The cooled water collects on the ground of the steel coil stacking pool and returns to the circulating water pool 100 through the return water trench 300.

[0031] The spray system 400 continuously sprays cooling water, which not only acts on the surface of the steel coil but also penetrates into the gaps between the layers inside the coil for cooling. This comprehensive cooling method significantly improves the cooling efficiency of the steel coil. Taking the cold rolling and pickling line as an example, its original design capacity was 1.53 million tons / year. Thanks to the efficient cooling of the spray system 400, the actual output soared to 2.5 million tons / year in 2024, achieving a significant improvement in production efficiency.

[0032] The leap in production efficiency allowed for the rational division of the original compact pickling and rolling combined production line's raw material storage area, creating separate storage areas for the pickling line and the pickling and rolling combined production line. This transformation did not require additional expansion of the storage area, nor did it necessitate the expansion of the hot rolling mill's storage area, thus achieving highly efficient utilization of space resources.

[0033] The efficient cooling system enables steel coils from the hot rolling mill to be rapidly cooled to the required production temperature, significantly reducing the waiting time before cold rolling. This not only improves the continuity of the production process but also significantly reduces inventory capital, minimizes the capital costs tied up in stockpiled steel coils, and enhances the company's capital turnover efficiency.

[0034] Without a cooling tower to cool the cooling water, a large amount of high-temperature cooling water forms a loop with the steel coil storage area, continuously raising the temperature of the water. On the one hand, the cooling efficiency of the high-temperature cooling water decreases, as it is impossible to cool the steel coils below 50°C with water exceeding 50°C. On the other hand, the higher the temperature of the cooling water, the more easily water vapor is generated when it is sprayed onto the steel coils, causing water mist to permeate the entire storage area and affecting the working environment. More importantly, since the crane operators cannot see the steel coils on the ground, it is very easy for the crane to be unable to lift the steel coils, causing them to fall from a height and potentially leading to a major safety accident.

[0035] The steel coil cooling device of this application realizes a closed-loop system of circulating cooling water. After the cooling water is sprayed to cool the steel coil, it is collected in the circulating water tank 100, cooled by the cooling tower 600, and then reused. This achieves efficient recycling of water resources, ensures a safe working environment, and avoids major safety risks. This process not only maintains high efficiency in steel coil cooling but also reduces the amount of water needed to replenish the circulating water tank 100. It effectively reduces water overflow into rainwater ditches, reduces potential environmental pollution, and demonstrates good environmental benefits.

[0036] In some related technologies, using fire-fighting water or circulating water for production and equipment cooling within a plant as cooling water, and then directly discharging it after use, will cause at least the following problems:

[0037] 1. Direct discharge after use results in a large amount of fire-fighting water being discharged into the factory's rainwater ditch, wasting a significant amount of fresh water.

[0038] 2. The fire pumps are overloaded; and the fire water pipe network has been under low pressure due to water pressure release in the raw material storage area, posing a threat to fire safety in other areas.

[0039] 3. If water quality stabilizers are added to fire-fighting water or circulating water used for production and equipment cooling within the plant, the large-scale discharge will cause an imbalance between scale inhibition and corrosion inhibition in the pipelines, resulting in a large amount of rust formation in the pipelines, which will seriously threaten the normal operation of equipment and pipelines of other units.

[0040] In the aforementioned steel coil cooling device, cooling water is supplied through the water supply pipe 200 and sprayed by the spray mechanism 400 to cool the steel coil. The cooled water then returns to the circulating water tank 100 through the return pipe trench. After this process, the temperature of the cooling water increases, and it is then transported through the cooling circulation pipe 500 to the cooling tower 600 for further cooling before returning to the circulating water tank 100. Thus, the coordinated operation of the spray mechanism 400 and the cooling tower 600 achieves a highly efficient cooling effect. The cooling water is circulated within the system, significantly reducing the amount of water discharged externally, thereby greatly reducing water pollution and water waste, and improving water resource utilization.

[0041] In some embodiments, the circulating water tank includes a return water tank 110 and a supply water tank 120 that are connected to each other. The return water tank 110 is connected to a return water trench 300. The supply water tank 120 is connected to a supply water pipe 200.

[0042] In some embodiments, see Figure 2 The spraying mechanism 400 includes multiple spray pipes 410 arranged at equal intervals, and the spray pipes 410 are provided with multiple sets of spray nozzles 420 arranged at equal intervals along the axial direction.

[0043] The design of multiple spray pipes 410 and multiple sets of spray nozzles 420 ensures that cooling water can be sprayed evenly onto the steel coils, improving the cooling effect. Moreover, the evenly spaced spray nozzles 420 can fully cover the steel coil stacking pool, ensuring that each steel coil is adequately cooled.

[0044] In some embodiments, see Figure 2 Each set of spray nozzles 420 includes multiple spray nozzles 420 distributed at different angles along the circumference of the spray pipe 410. For example, spray nozzles 420 distributed at 30°, 45°, 60°, 120°, 135°, and 150° can spray cooling water from multiple angles to ensure all-round cooling of the steel coil.

[0045] In some embodiments, the cooling tower 600 is designed to have a cooling capacity of 0.4-0.8 times the spray water volume of the spray mechanism 400.

[0046] This design ensures that the cooling tower 600 can effectively reduce the temperature of the cooling water to meet the cooling requirements of the steel coils. The optimized cooling capacity design guarantees the overall balance of the cooling system and improves cooling efficiency.

[0047] In some specific embodiments, the cooling tower 600 is a counter-flow cooling tower 600.

[0048] The cooling tower is designed to cool 200 cubic meters per hour at a temperature of 4℃-8℃. A high-efficiency, energy-saving, seal-free self-priming pump is used to supply water to the cooling tower; model number: 50WFB-B3, power 37KW, head 20 meters, flow rate 200 cubic meters per hour.

[0049] The sprinkler system has three units (selectable as two-in-one-standby or one-in-two-standby operation modes depending on production needs). The selected pumps are model ISG200-320, supplying water to the steel coil storage area for the sprinkler system. Each pump has a motor power of 37KW, a head of 38 meters, and a flow rate of 253 cubic meters per hour. The combined flow rate of the two pumps is approximately 500 cubic meters per hour.

[0050] Therefore, the cooling tower is designed to have a cooling capacity of 0.4-0.8 times the spray water volume of the spraying mechanism.

[0051] In some embodiments, the system further includes a level gauge and a water replenishment mechanism 520. The circulating water tank 100 is connected to an external water storage tank or water replenishment pipeline through the water replenishment mechanism 520. The level gauge is installed in the circulating water tank 100 and controls the start and stop of the water replenishment mechanism 520.

[0052] The level gauge and water replenishment mechanism 520 enable automatic water replenishment, ensuring a stable water level in the circulating water tank 100. Automatic water replenishment reduces unnecessary water waste and improves water conservation.

[0053] For example, the water replenishment mechanism 520 includes a water replenishment pump and a water replenishment pipeline. The water replenishment pipeline replenishes the circulating water tank 100 with water through a water storage tank.

[0054] In some embodiments, the circulating water tank 100 is provided with a step for the lowest water level, and the level gauge is disposed on the step.

[0055] The level gauge is installed on the step at the lowest water level, allowing for more precise water level control and preventing the water level from being too low and affecting the cooling effect. When the water level falls below the minimum level, water is added. This ensures the safe operation of the cooling system and prevents equipment damage due to insufficient water level.

[0056] In some embodiments, see Figure 1 The first end of the cooling circulation pipe 500 includes two parallel branch pipes, each with a corresponding circulation pump 510. Normally, the circulation pumps operate in a one-on-one standby mode. The two parallel branch pipes and circulation pumps 510 provide redundancy, improving system reliability. Furthermore, the cooling water flow rate can be flexibly adjusted according to actual needs, improving cooling efficiency.

[0057] In some embodiments, see Figure 1 It also includes an overflow pipe 700, which connects the circulating water pool 100 to an external rainwater ditch. The overflow pipe 700 allows excess water to be discharged into the rainwater ditch, reducing environmental pollution.

[0058] The above technical solutions of this utility model are merely preferred embodiments and do not limit the patent scope of this utility model. All equivalent structural transformations made under the technical concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this utility model.

Claims

1. A steel coil cooling device, characterized in that, This includes a circulating water tank, water supply pipes, return water trenches, spray system, cooling circulation pipelines, and cooling tower; The spraying mechanism is connected to the circulating water pool through the water supply pipe, and is used to spray the cooling water of the circulating water pool onto the steel coils to be cooled in the steel coil stacking pool. The return water trench connects the steel coil stacking pool and the circulating water pool, and is used to return the sprayed cooling water collected in the steel coil stacking pool to the circulating water pool. The first end of the cooling circulation pipeline is connected to the cooling circulation pipeline, and after flowing through the cooling tower, it returns to the circulating water pool through the second end. The cooling tower is used to cool and lower the temperature of the cooling water in the circulating water pool.

2. The steel coil cooling device according to claim 1, characterized in that, The spraying mechanism includes multiple spray pipes arranged at equal intervals, and the spray pipes are provided with multiple sets of spray nozzles arranged at equal intervals along the axial direction.

3. The steel coil cooling device according to claim 2, characterized in that, Each set of spray nozzles includes multiple spray nozzles distributed at different angles along the circumference of the spray pipe.

4. The steel coil cooling device according to claim 1, characterized in that, The cooling tower is designed to have a cooling capacity of 0.4-0.8 times the spray water volume of the spraying mechanism.

5. The steel coil cooling device according to claim 1, characterized in that, The cooling tower is a counter-flow cooling tower.

6. The steel coil cooling device according to claim 1, characterized in that, It also includes a level gauge and a water replenishment mechanism. The circulating water tank is connected to an external water storage tank or water replenishment pipeline through the water replenishment mechanism. The level gauge is installed in the circulating water tank and controls the start and stop of the water replenishment mechanism.

7. The steel coil cooling device according to claim 6, characterized in that, The circulating water tank is equipped with a step for the lowest water level, and the level gauge is installed on the step.

8. The steel coil cooling device according to claim 1, characterized in that, The first end of the cooling circulation pipeline includes two parallel branch pipes, each with a corresponding circulation pump.

9. The steel coil cooling device according to claim 1, characterized in that, It also includes an overflow pipe, which connects the circulating water pool to an external rainwater ditch.

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