An energy-saving and high-efficiency spray cooling device for galvanized wire strip steel.

Abstract

This utility model relates to the field of steel strip processing technology, specifically to an energy-saving and high-efficiency spray cooling device for galvanized steel strip. It includes a frame with a cooling box and a drying box connected in series on the frame. A steel strip conveying device is mounted on the frame, passing through both the cooling box and the drying box. The cooling box contains multiple sets of cooling water mist spraying components and a fan. The fan's inlet is connected to a filter and dehumidifier, the other side of which is connected to the cooling box. The fan's outlet is connected to the drying box. The cooling box and drying box are tightly connected, allowing the steel strip to evaporate some moisture using its own residual heat, thus saving energy and improving efficiency. Furthermore, this utility model uses a fan to guide the high-temperature gas from the cooling box into the drying box for drying. This increases the airflow rate in the cooling box, improving cooling efficiency, and eliminates the need for a separate heating element in the drying box, further improving efficiency and saving energy.

Description

Technical Field

[0001] This utility model relates to the field of steel strip production technology, and in particular to an energy-saving and high-efficiency spray cooling device for galvanized wire strip steel. Background Technology

[0002] Galvanized steel strip is a steel product in which a metallic zinc layer is formed on the surface of carbon structural steel or low alloy structural steel strip through a galvanizing process. Its core value lies in the fact that the sacrificial anode protection and physical isolation effect of the zinc layer greatly improves the corrosion resistance of the steel strip, while retaining the strength and processing performance of the steel itself. It is widely used in many fields such as industry, construction, and home furnishing.

[0003] The spray cooling process for galvanized steel strip is typically a cooling step after hot-dip galvanizing (using cold water spray to cool down and quickly fix the zinc layer structure). However, residual moisture remains on the steel strip surface after spray cooling, which can cause multiple problems if not dried. The core function of the galvanized layer is to protect the steel strip substrate through the sacrificial anode effect of zinc. However, a humid environment can damage the stability of the zinc layer. Residual moisture combines with oxygen and carbon dioxide in the air to form white, loose substances such as zinc hydroxide and zinc carbonate on the zinc layer surface, known in the industry as white rust. White rust not only affects the appearance of the steel strip but also reduces the adhesion and corrosion resistance of the zinc layer. If left untreated for a long time, the zinc layer beneath the white rust will continue to corrode, eventually losing its protective function for the substrate. Galvanized steel strip often requires subsequent processing (such as stamping, welding, painting, and coating), and residual moisture directly affects the processing quality. If residual moisture seeps into tiny defects in the zinc layer (such as pinholes or scratches), it will directly contact the steel strip substrate, forming a micro-battery effect of zinc-steel-water.

[0004] Currently, galvanized steel strips need to be dried separately after spray cooling. Moisture during transportation can easily affect the strips, and excessive heat loss during transportation reduces the strips' ability to evaporate moisture, thus prolonging the drying time, resulting in low efficiency and high energy consumption.

[0005] Therefore, the above-mentioned problems are technical issues that urgently need to be addressed. Utility Model Content

[0006] Purpose of the utility model: In view of the problems existing in the prior art, this utility model provides an energy-saving and high-efficiency spray cooling device for galvanized wire strip, aiming to solve the above-mentioned technical problems.

[0007] Technical solution: In order to achieve the above objectives, this utility model provides an energy-saving and high-efficiency spray cooling device for galvanized wire strip steel, including a frame, on which a cooling box and a drying box are connected in series, and a steel strip conveying device is provided on the frame, which passes through the cooling box and the drying box. The cooling box is equipped with multiple sets of cooling water mist spraying components and also includes a fan. The air inlet of the fan is connected to a filter and dehumidification device, the other side of the filter and dehumidification device is connected to the cooling box, and the air outlet of the fan is connected to the drying box.

[0008] As a further limitation of the above solution, the filter dehumidification device is provided with a solid adsorbent and filter material inside, the filter dehumidification device is also provided with an exhaust port that can be opened and closed, and a heater is also provided between the filter dehumidification device and the fan. The inlet end of the filter dehumidification device is equipped with a valve, and a bypass pipe is also provided on the connecting pipe between the fan and the filter dehumidification device. The two ends of the bypass pipe are connected to the pipes at both ends of the heater, and the bypass pipe is equipped with a valve to control its opening and closing.

[0009] As a further limitation of the above solution, the bottom of the cooling box is funnel-shaped, the bottom of the cooling box is connected to a water storage tank through a water pipe, the outlet of the water storage tank is connected to a cooling water mist spraying assembly, and a drive pump is provided on the water storage tank.

[0010] As a further limitation of the above scheme, a filter is also provided on the connecting pipeline between the water storage tank and the cooling tank, the filter including a series of bag filters and an ion removal device.

[0011] As a further limitation of the above scheme, the cooling water mist spraying assembly includes a rectangular annular water pipe, and multiple water mist nozzles are provided inside the annular water pipe, with the steel belt conveyor passing through the water mist nozzles.

[0012] As a further limitation of the above scheme, the steel belt conveying device includes a set of parallel transmission pulleys, with a water-permeable mesh between the transmission pulleys, and the steel belt conveying device is mounted on the frame by a bracket.

[0013] As a further limitation of the above solution, both the cooling box and the drying box are provided with transparent observation windows on their sides.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1) This utility model provides an energy-saving and high-efficiency spray cooling device for galvanized steel strip. The galvanized steel strip is fed into a cooling box by a steel strip conveyor. A cooling water mist spraying component in the cooling box sprays water mist to cool the galvanized steel strip. Simultaneously, a fan is activated to extract high-temperature air from the cooling box, increasing the airflow and accelerating the cooling efficiency. Moisture in the high-temperature air is largely removed by a filtration and dehumidification device, and then blown into a drying box to dry the galvanized steel strip. The galvanized steel strip dries rapidly under its own residual heat and the action of the hot air. The cooling box and drying box are tightly connected, avoiding damage during transport and heat loss from the steel strip. The steel strip can evaporate some moisture using its own residual heat, which helps save energy and improve efficiency. Furthermore, this utility model uses a fan to guide the high-temperature gas from the cooling box into the drying box for drying. This increases the airflow in the cooling box, improving cooling efficiency, and eliminates the need for a separate heating element in the drying box, further improving efficiency and saving energy.

[0015] 2) This utility model sets up a filtration and dehumidification device between the fan and the cooling box to remove moisture and impurities from the hot air in the cooling box for drying, thus ensuring product quality; at the same time, the adsorbent in the filtration and dehumidification device can be reduced by the heat provided by the system itself or the heater, so as to achieve recycling and save costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an energy-saving and high-efficiency spray cooling device for galvanized steel strip according to the present invention; Figure 2 This is a top sectional view of an energy-saving and high-efficiency spray cooling device for galvanized steel strip according to the present invention. Figure 3 This is a side sectional view of an energy-saving and high-efficiency spray cooling device for galvanized wire strip steel according to the present invention. Figure 4 This is an assembly diagram of the fan and filter dehumidification device described in this utility model.

[0017] In the diagram: 1-frame, 11-steel belt conveyor, 111-conveyor belt, 112-water leakage net; 2-Cooling box, 21-Cooling water mist spraying assembly, 211-Annular water pipe, 212-Water mist nozzle; 3-Drying oven; 4- Fan; 5-Filter and dehumidification device, 51-Exhaust port, 52-Heater, 53-Bypass pipe; 6-Water storage tank, 61-Drive pump; 7-Filter. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] like Figure 1-4 As shown: An energy-saving and high-efficiency spray cooling device for galvanized wire strip steel includes a frame 1, on which a cooling box 2 and a drying box 3 are connected in series. A steel strip conveying device 11 is provided on the frame 1, and the steel strip conveying device 11 passes through the cooling box 2 and the drying box 3. The cooling box 2 is equipped with multiple sets of cooling water mist spraying components 21, and also includes a fan 4. The air inlet of the fan 4 is connected to a filter dehumidification device 5. The other side of the filter dehumidification device 5 is connected to the cooling box 2, and the air outlet of the fan 4 is connected to the drying box 3.

[0020] The galvanized steel strip is fed into the cooling box 2 by the steel strip conveyor 11. The cooling water mist spraying component 21 in the cooling box 2 sprays water mist to cool the galvanized steel strip. At the same time, the fan 4 starts to extract the high-temperature air in the cooling box 2, increasing the air flow rate in the cooling box 2 and accelerating the cooling efficiency. The moisture in the high-temperature air is basically removed by the filter dehumidification device 5, and then blown into the drying box 3 to dry the galvanized steel strip. The galvanized steel strip dries quickly under its own residual heat and the action of hot air.

[0021] The filter dehumidification device 5 is equipped with a solid adsorbent and filter material inside. The filter dehumidification device 5 is also equipped with an exhaust port 51 that can be opened and closed. A heater 52 is also provided between the filter dehumidification device 5 and the fan 4. The solid adsorbent can be silica gel, molecular sieve, or alumina. It has a strong adsorption capacity for water vapor in the air and can achieve water vapor separation without introducing a low-temperature cold source. The temperature of the hot air remains basically unchanged during the process. The inlet of the dehumidification filter 5 is equipped with a valve, and a bypass pipe 53 is also provided on the connecting pipe between the fan 4 and the dehumidification filter 5. Both ends of the bypass pipe 53 are connected to the pipes at both ends of the heater 52, and a valve is provided on the bypass pipe 53 to control its opening and closing. During the spray drying operation, the fan 4 draws air from the cooling box 2, passes through the dehumidification filter 5, and then enters the drying box 3 through the bypass pipe 53. After the equipment operation is completed, the drying box 3 still maintains a high temperature. The valve at the inlet of the dehumidification filter 5 is closed, and the exhaust port 51 is opened. The fan 4 blows the hot air from the drying box 3 towards the dehumidification filter 5 to heat the solid adsorbent, causing the adsorbed water vapor to desorb and form wet waste gas which is discharged from the exhaust port 51. If the hot air in the drying box 3 is insufficient to dry the solid adsorbent, the heater 52 can be turned on, the valve adjusted to close the bypass pipe 53, and the fan 4 continuously blows hot air towards the dehumidification filter 5.

[0022] The cooling tank 2 has a funnel-shaped bottom, which is connected to a water storage tank 6 via a water pipe. The outlet of the water storage tank 6 is connected to a cooling water mist spraying assembly 21, and a drive pump 61 is installed on the water storage tank 6. The cooling water mist collects at the bottom of the cooling tank 2 and then flows into the water storage tank 6 for recycling.

[0023] To further optimize the design, a filter 7 is installed on the connecting pipeline between the water storage tank 6 and the cooling tank 2. The filter 7 includes a series of bag filters and an ion removal device. The cooled water flows through the filter 7 before entering the water storage tank 6. This effectively prevents impurities in the water from causing blockages, avoids double damage to the system equipment from corrosive ions and hard particles in the water, prevents surface contamination of the steel strip, and ensures product quality.

[0024] Specifically, the cooling water mist spraying assembly 21 includes a rectangular annular water pipe 211, and a plurality of water mist nozzles 212 are provided on the inner side of the annular water pipe 211. The steel belt conveyor 11 is arranged through the water mist nozzles 212.

[0025] Specifically, the steel belt conveying device 11 includes a set of parallel transmission pulleys 111, with a water-permeable mesh 112 between the transmission pulleys, and the steel belt conveying device 11 is mounted on the frame 1 by a bracket.

[0026] Both the cooling box 2 and the drying box 3 have transparent observation windows on their sides.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An energy-saving and high-efficiency spray cooling device for galvanized wire strip, characterized in that, Includes a frame (1), on which a cooling box (2) and a drying box (3) are connected in series, and a steel belt conveyor (11) is provided on the frame (1), which passes through the cooling box (2) and the drying box (3). The cooling box (2) is equipped with multiple sets of cooling water mist spraying components (21) and also includes a set of fans (4). The air inlet of the fans (4) is connected to a filter dehumidification device (5). The other side of the filter dehumidification device (5) is connected to the cooling box (2). The air outlet of the fans (4) is connected to the drying box (3).

2. The energy-saving high-efficiency spray cooling device for galvanizing line strip steel according to claim 1, characterized in that, The filter dehumidification device (5) is equipped with a solid adsorbent and filter material inside. The filter dehumidification device (5) is also equipped with an exhaust port (51) that can be opened and closed. A heater (52) is also provided between the filter dehumidification device (5) and the fan (4). The inlet end of the filter dehumidification device (5) is equipped with a valve, and a bypass pipe (53) is also provided on the connecting pipe between the fan (4) and the filter dehumidification device (5). The two ends of the bypass pipe (53) are connected to the pipes at both ends of the heater (52), and a valve is provided on the bypass pipe (53) to control its opening and closing.

3. The energy-saving high-efficiency spray cooling device for galvanizing line strip steel according to claim 1, characterized in that, The bottom of the cooling box (2) is funnel-shaped. The bottom of the cooling box (2) is connected to the water storage tank (6) through a water pipe. The outlet of the water storage tank (6) is connected to the cooling water mist spraying assembly (21). The water storage tank (6) is equipped with a drive pump (61).

4. The energy-saving high-efficiency spray cooling device for galvanizing line strip steel according to claim 3, characterized in that, A filter (7) is also provided on the connecting pipeline between the water storage tank (6) and the cooling tank (2). The filter (7) includes a bag filter and an ion removal device connected in series.

5. The energy-saving high-efficiency spray cooling device for a galvanizing line strip steel according to claim 1, characterized in that, The cooling water mist spraying assembly (21) includes a rectangular annular water pipe (211), and multiple water mist nozzles (212) are provided inside the annular water pipe (211). The steel belt conveyor (11) is installed through the water mist nozzles (212).

6. The energy-saving high-efficiency spray cooling device for a galvanizing line strip steel of claim 1, characterized in that, The steel belt conveyor (11) includes a set of parallel drive belts (111), with a water-permeable mesh (112) between the drive belts, and the steel belt conveyor (11) is mounted on the frame (1) by a bracket.

7. The energy-saving high-efficiency spray cooling device for a galvanizing line strip steel of claim 1, characterized in that, Both the cooling box (2) and the drying box (3) have transparent observation windows on their sides.

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