Air cooling device of strip steel production line

Abstract

The utility model relates to the technical field of strip steel production equipment, in particular to an air cooling device of a strip steel production line, which comprises a heat exchanger, a drying unit and an exhaust pipe. The heat exchanger is provided with a hot coil pipe and a cold coil pipe, the input end of the hot coil pipe of the heat exchanger is connected with a preheating section or a heating section of the strip steel production line through a first steam pipeline, and the output end of the hot coil pipe of the heat exchanger is provided with a second steam pipeline; the drying unit comprises a fan and a drying box, an air outlet end pipeline of the fan is connected with the input end of the heat exchanger cooling coil pipe, and the drying box is provided with a strip steel inlet and a strip steel outlet which are sequentially formed in the strip steel conveying direction; the air inlet end of the exhaust pipe is connected with the output end of a cooling coil pipe of the heat exchanger, the air outlet end of the exhaust pipe extends into an inner cavity of the drying box, the air outlet end of the exhaust pipe is close to a strip steel inlet of the drying box, and the air outlet end of the exhaust pipe faces the strip steel. According to the utility model, the drying effect on the strip steel is ensured, and the energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of strip steel production equipment, in particular to an air cooling device for a strip steel production line. Background Art

[0002] In the hot-rolled steel strip production line, the temperature of the steel strip after rolling in the finishing mill is usually very high, and it needs to be cooled quickly and evenly to control its structure and performance. During the cooling process, the steel strip is generally first cooled quickly by the laminar cooling system using water or water mist, and then the steel strip enters the air cooling device, using natural or forced convection of air to reduce the temperature of the steel strip and remove moisture from the surface of the steel strip. However, the current air cooling device requires at least two sets of fans to extract air to act on the surface of the steel strip, but the drying effect is not good and the energy consumption is high. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air cooling device for a strip steel production line, which not only ensures the drying effect of the strip steel but also can reduce energy consumption.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an air cooling device for a strip steel production line, comprising a heat exchanger, a drying unit and an exhaust pipe; the heat exchanger has a hot coil and a cold coil, the input end of the hot coil of the heat exchanger is connected to the preheating section or the heating section of the strip steel production line through a first steam pipeline, and the output end of the hot coil of the heat exchanger is provided with a second steam pipeline;

[0005] The drying unit comprises a fan and a drying box, the air outlet pipeline of the fan is connected to the input end of the cold coil of the heat exchanger, and the drying box has a strip steel inlet and a strip steel outlet arranged in sequence along the conveying direction of the strip steel;

[0006] The air inlet end of the exhaust pipe is connected to the output end of the cold coil of the heat exchanger, the air outlet end of the exhaust pipe extends into the inner cavity of the drying box, the air outlet end of the exhaust pipe is close to the strip steel inlet of the drying box, and the air outlet end of the exhaust pipe faces the strip steel.

[0007] Furthermore, the air outlet end of the exhaust pipe is divided into an upper air blowing nozzle and a lower air blowing nozzle, and a space for the strip steel to pass through is reserved between the upper air blowing nozzle and the lower air blowing nozzle.

[0008] Furthermore, the air outlet end of the exhaust pipe is inclined toward the strip steel inlet of the drying box.

[0009] Furthermore, the air outlets of the upper air blowing nozzle and the lower air blowing nozzle are long strip-shaped air outlets.

[0010] Furthermore, valves are provided on the first steam pipe and the second steam pipe.

[0011] Furthermore, a muffler is provided on the fan.

[0012] Furthermore, a drain valve is provided at the bottom of the drying box.

[0013] The beneficial effect of the utility model is that, different from the prior art, the heat exchanger is used to exchange heat between the steam exhaust gas after use in the preheating section or heating section of the strip steel production line and the air drawn into the drying box by the fan, so that the air discharged from the exhaust pipe can not only blow away the moisture on the surface of the strip steel, but also evaporate the moisture remaining on the surface of the strip steel, thereby ensuring the drying effect of the strip steel. Then the strip steel continues to move toward the strip steel outlet direction of the drying box, and in this process, the strip steel can be naturally cooled. Thus, the use of a fan can complete the cooling and drying of the strip steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the system structure of an air cooling device for a strip steel production line proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of a drying box of an air cooling device of a strip steel production line proposed by the utility model;

[0016] Description of labels:

[0017] 1. Heat exchanger; 11. First steam pipeline; 12. Second steam pipeline;

[0018] 2. Drying mechanism; 21. Fan; 211. Muffler; 22. Drying box; 221. Drain valve;

[0019] 3. Exhaust pipe; 31. Upper air blowing nozzle; 32. Lower air blowing nozzle;

[0020] 4. Valve; 5. Strip steel. DETAILED DESCRIPTION

[0021] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0022] Please refer to Figure 1 and Figure 2As shown, the utility model is an air cooling device for a strip steel production line, comprising a heat exchanger 1, a drying mechanism 2 and an exhaust duct 3; the heat exchanger 1 has a hot coil and a cold coil, the input end of the hot coil of the heat exchanger 1 is connected to the preheating section or the heating section of the strip steel production line through a first steam pipe 11, and the output end of the hot coil of the heat exchanger 1 is provided with a second steam pipe 12; the drying mechanism 2 comprises a fan 21 and a drying box 22, the air outlet pipeline of the fan 21 is connected to the input end of the cold coil of the heat exchanger 1, and the drying box 22 has a strip steel inlet and a strip steel outlet arranged in sequence along the conveying direction of the strip steel 5; the air inlet end of the exhaust duct 3 is connected to the output end of the cold coil of the heat exchanger 1, the air outlet end of the exhaust duct 3 extends into the inner cavity of the drying box 22, the air outlet end of the exhaust duct 3 is close to the strip steel inlet of the drying box 22, and the air outlet end of the exhaust duct 3 faces the strip steel 5. The heat exchanger 1 is used to exchange heat between the steam exhaust gas used in the preheating section or heating section of the strip steel production line and the air drawn into the drying box 22 by the fan, so that the air discharged from the exhaust pipe 3 can not only blow away the moisture on the surface of the strip steel 5, but also evaporate the moisture remaining on the surface of the strip steel 5, thereby ensuring the drying effect of the strip steel 5. Then the strip steel continues to move toward the strip steel outlet of the drying box 22, and during this process, the strip steel 5 can be naturally cooled.

[0023] In one embodiment, see Figure 2 As shown, the air outlet end of the exhaust pipe 3 is divided into an upper air blowing nozzle 31 and a lower air blowing nozzle 32, and a space for the strip steel to pass through is reserved between the upper air blowing nozzle 31 and the lower air blowing nozzle 32. The upper air blowing nozzle 31 and the lower air blowing nozzle 32 are used to act on the upper and lower surfaces of the strip steel 5 respectively to ensure that the strip steel 5 is fully dried.

[0024] In an optional implementation, please refer to Figure 2 As shown, the air outlet end of the exhaust pipe 3 is inclined toward the strip steel inlet of the drying box 22. It can prevent the splashing water from falling on the surface of the strip steel 5 again.

[0025] In an optional embodiment, the air outlets of the upper air blowing nozzle 31 and the lower air blowing nozzle 32 are long strip air outlets. The long strip air outlets can ensure that the upper air blowing nozzle 31 and the lower air blowing nozzle 32 can clean the strip steel and avoid omission.

[0026] In one embodiment, see Figure 1 As shown, valves 4 are provided on the first steam pipe 11 and the second steam pipe 12. By adjusting the opening of the valve 4, the flow rate of steam in the heat coil of the heat exchanger 1 can be controlled, thereby controlling the temperature of the air flowing into the exhaust pipe 3.

[0027] In an optional implementation, please refer to Figure 1As shown, the fan 21 is provided with a muffler 211. The muffler 211 can reduce noise pollution.

[0028] In an optional implementation, please refer to Figure 1 As shown, a drain valve 221 is provided at the bottom of the drying box 22. On-site personnel can drain the water accumulated in the drying box 22 through the drain valve 221.

[0029] Embodiment 1

[0030] An air cooling device for a strip steel production line, please refer to Figure 1 and Figure 2 As shown, it includes a heat exchanger 1, a drying mechanism 2 and an exhaust pipe 3; the heat exchanger 1 has a hot coil and a cold coil, the input end of the hot coil of the heat exchanger 1 is connected to the preheating section or heating section of the strip steel production line through a first steam pipe 11, and the output end of the hot coil of the heat exchanger 1 is provided with a second steam pipe 12; the drying mechanism 2 includes a fan 21 and a drying box 22, the air outlet end pipeline of the fan 21 is connected to the input end of the cold coil of the heat exchanger 1, and the drying box 22 has a strip steel inlet and a strip steel outlet arranged in sequence along the conveying direction of the strip steel 5; the exhaust pipe 3 The air inlet end is connected to the output end of the cold coil of the heat exchanger 1, and the air outlet end of the exhaust pipe 3 extends into the inner cavity of the drying box 22. The air outlet end of the exhaust pipe 3 is close to the strip steel inlet of the drying box 22. The air outlet end of the exhaust pipe 3 is divided into an upper blowing nozzle 31 and a lower blowing nozzle 32 that blow air toward the strip steel 5. There is a space for the strip steel to pass between the upper blowing nozzle 31 and the lower blowing nozzle 32. The upper blowing nozzle 31 and the lower blowing nozzle 32 are inclined toward the strip steel inlet of the drying box 22. The air outlets of the upper blowing nozzle 31 and the lower blowing nozzle 32 are long strip-shaped air outlets. The first steam pipe 11 and the second steam pipe 12 are provided with a valve 4. The fan 21 is provided with a muffler 211. The muffler 211 can reduce noise pollution. The bottom of the drying box 22 is provided with a drain valve 221.

[0031] Working principle: The heat exchanger 1 is used to exchange heat between the steam exhaust gas used in the preheating section or heating section of the strip steel production line and the air drawn into the drying box 22 by the fan, so that the air discharged from the exhaust pipe 3 can not only blow away the moisture on the surface of the strip steel 5, but also evaporate the moisture remaining on the surface of the strip steel 5, thereby ensuring the drying effect of the strip steel 5. Then the strip steel continues to move toward the strip steel outlet of the drying box 22, and during this process, the strip steel 5 can be naturally cooled.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An air cooling device for a strip steel production line, characterized in that: It includes a heat exchanger, a drying mechanism and an exhaust pipe; the heat exchanger has a hot coil and a cold coil, the input end of the hot coil of the heat exchanger is connected to the preheating section or the heating section of the strip steel production line through a first steam pipeline, and the output end of the hot coil of the heat exchanger is provided with a second steam pipeline; The drying mechanism comprises a fan and a drying box, the air outlet pipe of the fan is connected to the input end of the cold coil of the heat exchanger, and the drying box has a strip steel inlet and a strip steel outlet arranged in sequence along the conveying direction of the strip steel; The air inlet end of the exhaust pipe is connected to the output end of the cold coil of the heat exchanger, the air outlet end of the exhaust pipe extends into the inner cavity of the drying box, the air outlet end of the exhaust pipe is close to the strip steel inlet of the drying box, and the air outlet end of the exhaust pipe faces the strip steel.

2. The air cooling device for a strip steel production line according to claim 1, characterized in that: The air outlet end of the exhaust pipe is divided into an upper air blowing nozzle and a lower air blowing nozzle, and a space for the strip steel to pass through is reserved between the upper air blowing nozzle and the lower air blowing nozzle.

3. The air cooling device for a strip steel production line according to claim 1 or 2, characterized in that: The air outlet end of the exhaust pipe is inclined toward the strip steel inlet of the drying box.

4. The air cooling device for a strip steel production line according to claim 2, characterized in that: The air outlets of the upper air blowing nozzle and the lower air blowing nozzle are long strip-shaped air outlets.

5. The air cooling device for a strip steel production line according to claim 1, characterized in that: The first steam pipe and the second steam pipe are provided with valves.

6. The air cooling device for a strip steel production line according to claim 1, characterized in that: The fan is provided with a muffler.

7. The air cooling device for a strip steel production line according to claim 1, characterized in that: A drain valve is provided at the bottom of the drying box.

Images