Strip steel drying device and strip steel production equipment

Abstract

The utility model relates to the technical field of drying, and discloses a strip steel drying device and strip steel production equipment. According to the strip steel drying device, a fan comprises an air inlet and an air outlet which communicate with each other; the heat exchange mechanism is connected with the air outlet and the heat source; the drying mechanism comprises a drying chamber for containing strip steel and a plurality of injection pipes, the multiple injection pipes are arranged in the drying chamber, the multiple injection pipes are connected with the heat exchange mechanism, the multiple injection pipes are arranged at intervals in the first direction, and the injection pipes extend in the second direction; the air return channel communicates with the drying cavity and the air inlet. The device is used for solving the problem that the drying effect is poor, waste heat of a drying cavity is recycled through an air return channel, the air inlet temperature of a draught fan is increased, the strip steel drying effect is improved, the influence of the environment temperature on the strip steel drying effect is reduced, and efficient strip steel drying can be achieved in low-temperature seasons.

Description

Technical Field

[0001] This application belongs to the field of cold rolling drying, and in particular relates to a strip drying device and strip production equipment. Background Technology

[0002] Strip steel mainly refers to narrow-width coils, such as narrow strip steel and medium-width strip steel. Strip steel is primarily composed of three materials: carbon steel, alloy steel, and stainless steel. It is mainly divided into hot-rolled strip steel and cold-rolled strip steel. Hot-rolled strip steel is rolled at high temperatures, while cold-rolled strip steel is rolled directly at room temperature.

[0003] During the production process, steel strip needs to be pickled. After pickling, the surface of the steel strip contains moisture, which needs to be dried to reduce the risk of rust. However, existing drying equipment is greatly affected by the external ambient temperature, resulting in unsatisfactory drying effects. Utility Model Content

[0004] This application provides a strip drying device and strip production equipment, which can improve the strip drying effect.

[0005] On one hand, this application provides a strip steel drying device, including: a fan, including a connected air inlet and an air outlet; a heat exchange mechanism, connected to the air outlet and a heat source, for heating the air at the air outlet through the heat source; a drying mechanism, including a drying chamber for accommodating the strip steel and a plurality of spray pipes, the plurality of spray pipes being placed in the drying chamber and connected to the heat exchange mechanism, the plurality of spray pipes being spaced apart along a first direction and extending along a second direction for spraying hot air onto the strip steel, the first direction and the second direction intersecting; and a return air channel, connected to the drying chamber and the air inlet.

[0006] In some embodiments of this application, the injection pipe includes two intersecting injection sections, the extension direction of the injection section is at an angle to the second direction, the injection section is provided with injection holes along its length direction, and the injection section is connected to the heat exchange mechanism.

[0007] In some embodiments of this application, the injection pipe further includes a connecting portion rotatably connected to the injection portion, the injection portion being configured to rotate relative to the connecting portion about an axis along the length direction of the injection portion to adjust the angle of the injection hole relative to the strip steel, and the connecting portion being connected to the heat exchange mechanism.

[0008] In some embodiments of this application, the spraying part includes a pipe body and an air guide connected to the outer wall of the pipe body. The pipe body is provided with air holes along its length. The air guide includes an air guide cavity and the spray hole that are connected in a communication manner. The spray hole is located at one end of the air guide away from the pipe body. The air guide and the pipe body surround to form the air guide cavity. The air guide cavity has a decreasing trend from the pipe body to the spray hole along the radial direction of the pipe body. The air hole is connected to the air guide cavity.

[0009] In some embodiments of this application, the drying mechanism includes a housing that encloses to form the drying chamber, and the connecting portion is installed in the housing.

[0010] In some embodiments of this application, the spray pipe further includes an end portion disposed at one end of the spray section away from the connecting portion, the end portion being rotatably connected to the spray section, and the end portion being connected to the side of the housing away from the drying chamber.

[0011] In some embodiments of this application, the end is provided with a door structure, which is used to open and close the spray section.

[0012] In some embodiments of this application, the plurality of injection pipes includes a first group of injection pipes and a second group of injection pipes arranged along a third direction, the strip steel is disposed between the first group of injection pipes and the second group of injection pipes, and the first direction, the second direction and the third direction intersect each other.

[0013] In some embodiments of this application, the heat exchange mechanism includes a first heat exchange channel and a second heat exchange channel, wherein the first heat exchange channel is connected to the air outlet and the second heat exchange channel is used to connect to the heat source.

[0014] In some embodiments of this application, the strip drying device further includes a temperature detection element and a switching element, wherein the temperature detection element is disposed in the drying chamber and is used to detect the temperature value of the drying chamber;

[0015] The switching element is disposed in the second heat exchange channel, and the switching element is configured to adjust the opening of the second heat exchange channel based on the temperature value detected by the temperature detection element.

[0016] On the other hand, this application also provides a strip steel production equipment, including the strip steel drying device described above.

[0017] The strip drying device and strip production equipment of this application embodiment connect the drying chamber and the air inlet through the return air channel, so as to circulate the waste heat of the drying chamber, increase the air inlet temperature of the fan, improve the drying effect on the strip, reduce the influence of ambient temperature on the drying effect of the strip, and realize efficient drying of strip even in low temperature seasons; and set up multiple spray pipes to dry the strip at multiple points, thereby improving the drying efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the strip drying apparatus provided in some embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the strip drying apparatus provided in some embodiments of this application from another perspective;

[0021] Figure 3 A structural schematic diagram of a strip drying apparatus provided in some embodiments of this application from another perspective;

[0022] Figure 4 for Figure 1 A partial schematic diagram of the injection pipe shown;

[0023] Figure 5 The image shown is a partial cross-sectional view of a strip drying apparatus provided in some embodiments of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Fan; 101. Air inlet; 102. Air outlet;

[0026] 200. Heat exchange mechanism; 201. Switching element; 202. Temperature detection element; 210. Second heat exchange channel;

[0027] 300. Drying mechanism; 310. Drying chamber; 311. Box body; 320. Spray pipe; 350. Conveying assembly; 360. Blowing mechanism; 321. Spray section; 322. Connecting section; 323. End; 330. First group of spray pipes; 340. Second group of spray pipes; 301. Pipe body; 302. Air guide; 303. Spray hole; 304. Air hole; 305. Air guide cavity;

[0028] 400, return air duct; 500, strip steel; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0031] The cold-rolled pickling continuous rolling line mainly uses hot-rolled steel coils as raw materials. After pickling to remove oxide scale, it obtains strip steel, which is then cold-rolled. After pickling and rinsing, water adheres to the surface of the strip steel, requiring it to be squeezed dry by squeeze rollers. However, squeezing cannot completely remove the water film on the surface of the strip steel because the pickling water film contains a small amount of Cl ions. The strip steel needs to be further dried in a dryer to remove the water film on the surface of the strip steel to prevent rusting and affecting product quality.

[0032] Existing dryer drying methods use steam to heat cold air, creating hot air that is then blown onto the surface of the strip steel to achieve drying. Because the steam temperature and flow rate are relatively fixed, the high ambient temperature in summer results in even higher temperatures after heating, leading to better surface drying of the strip steel. However, the low ambient temperature in winter results in relatively lower temperatures after heating, leading to poorer drying effects and water residue at the dryer outlet, which can cause rust and yellowing on the strip steel surface. During cold rolling, the high strength of the strip steel and the low reduction rate of the rolling mill mean that areas with water residue, rust, and yellowing will exhibit color differences after rolling, affecting product quality.

[0033] In view of this, the present application provides a strip steel drying device, which forms a return air channel between the drying chamber and the air inlet of the fan, and uses waste heat to increase the air inlet temperature of the fan, thereby improving the drying effect when the external environment is cold, such as in winter. Furthermore, the strip steel is dried evenly through multiple spray pipes, which further improves the drying effect.

[0034] Figure 1 A schematic diagram of the strip drying apparatus provided in some embodiments of this application; Figure 2 This is a schematic diagram of the strip drying apparatus provided in some embodiments of this application from another perspective; Figure 3 This is a structural schematic diagram of a strip drying apparatus provided in some embodiments of this application from another perspective.

[0035] like Figures 1 to 3 As shown in the figure, this application provides a strip steel 500 drying device, including a fan 100, a heat exchange mechanism 200, a drying mechanism 300, and a return air channel 400. The fan 100 includes a connected air inlet 101 and an air outlet 102. The heat exchange mechanism 200 is connected to the air outlet 102 and a heat source to heat the air at the air outlet 102. The drying mechanism 300 includes a drying chamber 310 for accommodating the strip steel 500 and a plurality of spray pipes 320. The plurality of spray pipes 320 are placed in the drying chamber 310 and connected to the heat exchange mechanism 200. The plurality of spray pipes 320 are spaced apart along a first direction X and extend along a second direction Y to spray hot air onto the strip steel 500. The first direction X and the second direction Y intersect. The return air channel 400 is connected to the drying chamber 310 and the air inlet 101.

[0036] The fan 100 draws in cool air from the external environment through the air inlet 101 and discharges it into the heat exchange mechanism 200 through the air outlet 102. The fan 100 can be a centrifugal fan 100, an axial flow fan 100, a mixed flow fan 100, or a crossflow fan 100, etc. For example, the fan 100 is driven by a power output component, which can be a motor.

[0037] The heat exchange mechanism 200 heats the cold air entering through the air outlet 102 to generate hot air. The heat exchange mechanism 200 can be a direct contact heat exchanger, a storage heat exchanger, or an indirect heat exchanger. Among them, the indirect heat exchanger can be a tube heat exchanger, a plate heat exchanger, or a spiral plate heat exchanger.

[0038] For example, the heat exchange mechanism 200 includes a first heat exchange port and a second heat exchange port. The first heat exchange port is connected to the air outlet 102, and the second heat exchange port is connected to a heat source. When the heat source flows through the heat exchange mechanism 200, it heats the cold air entering the heat exchange mechanism 200. The heated hot air is discharged from the heat exchange mechanism 200 and enters the drying mechanism 300.

[0039] The drying mechanism 300 heats and dries the strip steel 500 placed in the drying chamber 310 with hot air. Multiple spray pipes 320 of the drying mechanism 300 are connected to the heat exchange mechanism 200, and hot air enters the multiple spray pipes 320 respectively to dry the strip steel 500 at multiple points.

[0040] The drying chamber 310 contains at least a portion of the strip 500 for a period of time and dries the strip 500 through the spray pipe 320. Exemplarily, the drying chamber 310 extends along the length of the strip 500. In one example, the length of the drying chamber 310 may be equal to or less than the length of a single strip 500.

[0041] Multiple injection pipes 320 are connected to the heat exchange mechanism 200. Exemplarily, the multiple injection pipes 320 are spaced apart along the length direction of the strip 500, and extend along the width direction of the strip 500. The length direction of the strip 500 is a first direction X, and the width direction is a second direction Y. Exemplarily, the injection pipes 320 are straight, zigzag, or curved along the second direction Y. Exemplarily, the cross-section of the injection pipes 320 is any shape, such as circular, rectangular, triangular, or semi-circular. The injection pipes 320 are parallel to or at an angle to the surface of the strip 500.

[0042] The return air duct 400 is a channel connecting the air inlet 101 and the drying chamber 310. For example, the return air duct 400 can be a metal pipe, plastic pipe, corrugated pipe, etc. The fan 100 draws hot air from the drying chamber 310 to the air inlet 101 through the return air duct 400, and then into the heat exchange mechanism 200 through the air outlet 102. After being heated again, the air enters the drying chamber, forming a circulation.

[0043] The return air duct 400 connects the drying chamber 310 and the air inlet 101, allowing the waste heat of the drying chamber 310 to be recycled, increasing the air inlet temperature of the fan 100, improving the drying effect on the strip steel 500, reducing the impact of ambient temperature on the drying effect of the strip steel 500, and enabling efficient drying of the strip steel 500 even in low-temperature seasons; in addition, multiple spray pipes 320 are set up to dry the strip steel 500 at multiple points, improving the drying efficiency.

[0044] Using multiple spray pipes 320 to dry the strip steel 500 can effectively reduce the impact of hot air returning to the drying chamber 310 in the return air channel 400 on the drying effect of the strip steel 500.

[0045] In some alternative embodiments, the return air duct 400 is detachably connected to the air inlet 101. When the external ambient temperature is low, the return air duct 400 is connected to the air inlet 101. When the external ambient temperature is high, the return air duct 400 can be separated from the air inlet 101.

[0046] Continue to refer to Figure 3 In one embodiment of this application, the strip steel 500 drying device further includes a purging mechanism 360, which is located at the inlet of the drying mechanism 300. That is, along the conveying direction of the strip steel 500, the purging mechanism 360 is positioned before the drying mechanism 300. The conveyed strip steel 500 is first purged by the purging mechanism 360 before entering the drying mechanism 300 for drying, thereby improving drying efficiency.

[0047] For example, the purging mechanism 360 may use vacuum nozzles arranged vertically along the thickness direction of the strip 500 to perform preliminary cleaning of the water film on the surface of the strip 500 by blowing compressed air.

[0048] Continue to refer to Figure 2 The multiple injection pipes 320 include a first group of injection pipes 330 and a second group of injection pipes 340 arranged along the third direction Z. A strip steel 500 is arranged between the first group of injection pipes 330 and the second group of injection pipes 340. The third direction Z, the first direction X and the second direction Y intersect each other.

[0049] For example, the third party is in the thickness direction of the strip, Z being 500.

[0050] The first set of injection pipes 330 can be disposed on the side of the strip 500 opposite to the second set of injection pipes 340. For example, the first set of injection pipes 330 and the second set of injection pipes 340 can be disposed opposite to each other or staggered along the first direction X.

[0051] In one example, the strip 500 includes a first surface and a second surface disposed opposite to each other, a first set of spray pipes 330 for purging and drying the first surface, and a second set of spray pipes 340 for purging and drying the second surface.

[0052] By setting up a first set of spray pipes 330 and a second set of spray pipes 340 to dry the two opposite sides of the strip steel 500, the drying efficiency of the strip steel 500 is improved.

[0053] Furthermore, in one specific embodiment of this application, the drying mechanism 300 further includes a conveying assembly 350, which is arranged along a first direction X for conveying the strip steel 500. When the spray pipe 320 sprays hot air onto the strip steel 500, the conveying assembly 350 can convey the strip steel 500 at a certain speed or stop operating.

[0054] In one example, the conveying mechanism includes a first conveying roller and a second conveying roller, which are in rolling contact with the strip 500 and are arranged opposite each other along a third direction Z.

[0055] Continue to refer to Figure 1 In an optional embodiment of this application, the spray pipe 320 includes two spray sections 321 that are intersecting and arranged. The extension direction of the spray section 321 is set at an angle to the second direction Y. The spray section 321 is provided with spray holes 303 along its length direction. The spray section 321 is connected to the heat exchange mechanism 200.

[0056] The spray section 321 is the part of the spray pipe 320 that outputs hot air. The spray section 321 is arranged opposite to the strip 500 along the thickness direction of the strip 500. Both spray sections 321 are connected to the heat exchange mechanism 200 and are used to push and dry the water film on the surface of the strip 500 along the width direction.

[0057] The extension direction of the spray section 321 is the length direction of the spray section 321. There is a certain angle between the two spray sections 321, and the opening of the included angle between the two spray sections 321 faces the first direction X. This allows the hot air ejected from the spray holes 303 of the spray section 321 to exert a pushing force on the water on the surface of the strip 500 towards both sides of the strip 500's width direction, thereby improving the drying efficiency of the strip 500.

[0058] The injection orifice 303 and the strip 500 can be directly opposite each other or at an angle. The angle between the injection orifice 303 and the strip 500 can be the same or different. There can be one or more injection orifices 303.

[0059] In one example, the angle A between the extension direction of the jet section 321 and the second direction Y ranges from 10 degrees to 40 degrees. For example, the angle A is 10 degrees, 15 degrees, 20 degrees, 25 degrees, or 30 degrees.

[0060] In one embodiment of this application, the spray section 321 includes a first end and a second end disposed opposite to each other along the length direction. The first ends of the two spray sections 321 are connected, and the second ends are connected to the housing 311 of the drying mechanism 300. The first end is connected to the heat exchange mechanism 200. Exemplarily, the first end is located in the middle of the strip 500.

[0061] In one embodiment of this application, the two spray sections 321 are arranged in a V-shape. The angles between the two spray sections 321 and the second direction Y can be the same or different.

[0062] Figure 4 for Figure 1 A partial schematic diagram of the injection pipe 320 shown.

[0063] like Figure 1 and Figure 4 As shown, in an optional embodiment of this application, the injection pipe 320 further includes a connecting portion 322, which is rotatably connected to the injection portion 321. The injection portion 321 is configured to rotate relative to the connecting portion 322 about the axis of the injection portion 321 along the length direction to adjust the angle of the injection hole 303 relative to the strip 500. The connecting portion 322 is connected to the heat exchange mechanism 200.

[0064] The connecting part 322 connects the spray part 321 to the heat exchange mechanism 200, and the connecting part 322 connects between the two spray parts 321. In one example, the connecting part 322 is V-shaped.

[0065] For example, the connecting part 322 is rotatably connected to the spraying part 321 through a bearing assembly, a bushing assembly, a gear assembly, etc.

[0066] The position of the spray hole 303 can be adjusted by rotatably connecting the connecting part 322 and the spraying part 321, thereby improving the flexibility of the spray hole 303 and the drying efficiency of the strip steel 500.

[0067] In addition, continue to refer to Figure 4 In other embodiments of this application, the drying mechanism 300 includes a housing 311, which surrounds a drying chamber 310, and a connecting part 322 is installed on the housing 311.

[0068] For example, the housing 311 can be in the shape of a cuboid, a cylinder, etc. One end of the return air duct 400 is connected to the housing 311 and communicates with the drying chamber 310.

[0069] In one example, the connection portion 322 of the first set of injection pipes 330 is connected to one side inner wall of the housing 311, and the connection portion 322 of the second set of injection pipes 340 is connected to the opposite side inner wall of the housing 311. For example, the connection portion 322 is connected to the housing 311 via a flange.

[0070] In addition, in some embodiments of this application, the spray pipe 320 further includes an end 323, which is disposed at one end of the spray section 321 away from the connecting section 322. The end 323 is rotatably connected to the spray section 321 and is connected to the side of the housing 311 away from the drying chamber 310.

[0071] In other words, end portion 323 is located outside the drying chamber 310 and connected to the housing 311. The spray portion 321 is located between end portion 323 and connecting portion 322 and can be rotatably disposed relative to end portion 323 and connecting portion 322.

[0072] For example, end 323 is detachably connected to housing 311.

[0073] The end 323 facilitates the connection and fixation of the spray pipe 320 and the housing 311, improving installation convenience.

[0074] Furthermore, in some alternative embodiments of this application, the end 323 is provided with a door structure for switching the spray section 321 on and off.

[0075] For example, the end portion 323 penetrates the housing 311 and communicates with the spray portion 321.

[0076] When maintenance is required, the door structure is in the open state, which facilitates the maintenance of the spray pipe 320. When the drying process is in progress, the door structure is in the closed state.

[0077] Figure 5 The image shown is a partial cross-sectional view of a strip steel 500 drying apparatus provided in some embodiments of this application.

[0078] like Figure 4 and Figure 5 As shown, the jet section 321 includes a pipe body 301 and an air guide 302 connected to the outer wall of the pipe body 301. The pipe body 301 is provided with an air hole 304 along its length. The air guide 302 includes an air guide cavity 305 and a jet hole 303 connected in a communication manner. The jet hole 303 is provided at one end of the air guide 302 away from the pipe body 301. The air guide 302 and the pipe body 301 surround each other to form the air guide cavity 305. The air guide cavity 305 has a decreasing tendency from the pipe body 301 to the jet hole 303 along the radial direction of the pipe body 301. The air hole 304 is connected to the air guide cavity 305.

[0079] In other words, the air guide 302 is arranged opposite to the air hole 304 and is connected to the outer wall of the pipe body 301; the air guide cavity 305 has a tapering tendency from the pipe body 301 toward the strip steel 500 along the radial direction of the pipe body 301; the injection hole 303 is arranged at the end of the air guide 302 away from the pipe body 301; and the air hole 304 is connected to the air guide cavity 305.

[0080] In one example, the air guide 302 is V-shaped. The V-shaped tip of the air guide 302 has a spray hole 303.

[0081] For example, the pipe body 301 is provided with one or more air holes 304. In one example, the pipe body 301 has two air holes 304 along its length, and the distance between the two air holes 304 is greater than half the distance between the span connecting the air guide 302 and the pipe body 301. This allows the air holes 304 to enter the air guide cavity 305 as close as possible to the inner wall of the air guide 302.

[0082] The reduced airflow of the air guide cavity 305 can increase the outlet air pressure of the spray hole 303, thereby improving the drying effect on the strip steel 500.

[0083] like Figure 2 As shown, specifically, in some optional embodiments of this application, the heat exchange mechanism 200 includes a first heat exchange channel (not shown in the figure) and a second heat exchange channel 210. The first heat exchange channel is connected to the air outlet 102, and the second heat exchange channel 210 is used to connect to a heat source.

[0084] For example, the heat exchange medium of the heat source can be a gas or a liquid. For instance, the heat exchange medium is water vapor.

[0085] For example, the first heat exchange channel and the second heat exchange channel 210 exchange heat through a partition or pipe. There may be one or more first heat exchange channels and one or more second heat exchange channels 210.

[0086] The first heat exchange channel and the second heat exchange channel 210 can be arranged in parallel or wrapped around each other.

[0087] In one example, the second heat exchange channel 210 is placed inside the first heat exchange channel.

[0088] Continue to refer to Figure 2 In other embodiments of this application, the strip steel 500 drying device further includes a temperature detection element 202 and a switch element 201. The temperature detection element 202 is disposed in the drying chamber 310 and is used to detect the temperature value of the drying chamber 310. The switch element 201 is disposed in the second heat exchange channel 210 and is configured to adjust the opening degree of the second heat exchange channel 210 based on the temperature value detected by the temperature detection element 202.

[0089] For example, the temperature sensing element 202 can be a thermocouple, a resistance temperature detector (RTD), an infrared sensor, a fiber optic sensor, etc. The temperature sensing element 202 can be disposed on the inner wall of the housing 311, such as the upper wall, lower wall, or side wall.

[0090] The switch element 201 can be a gate valve, ball valve, globe valve, plug valve, etc. The switch element 201 is an electrically controlled switch structure and is connected to the temperature detection element 202.

[0091] In one example, the temperature sensor 202 and the switch 201 are electrically or signal-connected via a controller. In another example, when the temperature value of the temperature sensor 202 is higher than 85°C, the switch 201 is automatically turned off, stopping the heating of the hot air supplied to the return air duct 400. Conversely, when the temperature value of the temperature sensor 202 is lower than 65°C, the switch 201 is automatically turned on, heating the hot air supplied to the return air duct 400. The opening degree of the switch 201 can be controlled by the temperature value of the temperature sensor 202.

[0092] Automatic control of drying temperature is achieved by setting temperature detection element 202 and switch element 201, thereby improving heat utilization and saving energy.

[0093] This application also provides a strip steel 500 production equipment, including the strip steel 500 drying device described in the above embodiment.

[0094] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A strip steel drying device, characterized in that, include: A fan, including a connected air inlet and air outlet; A heat exchange mechanism, connected to the air outlet and the heat source, is used to heat the air at the air outlet through the heat source; The drying mechanism includes a drying chamber for accommodating strip steel and a plurality of spray pipes, the plurality of spray pipes being placed in the drying chamber and connected to the heat exchange mechanism, the plurality of spray pipes being spaced apart along a first direction and extending along a second direction for spraying hot air onto the strip steel, the first direction and the second direction intersecting; The return air duct connects the drying chamber and the air inlet.

2. The strip steel drying device according to claim 1, characterized in that, The injection pipe includes two intersecting injection sections, the extension direction of the injection section is at an angle to the second direction, the injection section has injection holes along its length, and the injection section is connected to the heat exchange mechanism.

3. The strip steel drying apparatus according to claim 2, characterized in that, The injection pipe further includes a connecting portion rotatably connected to the injection portion. The injection portion is configured to rotate relative to the connecting portion about an axis along its length to adjust the angle of the injection hole relative to the strip steel. The connecting portion is connected to the heat exchange mechanism.

4. The strip steel drying apparatus according to claim 2 or 3, characterized in that, The jetting section includes a pipe body and an air guide connected to the outer wall of the pipe body, and the pipe body is provided with air holes along its length. The air guide includes an air guide cavity and a spray hole that are connected together. The spray hole is located at one end of the air guide away from the pipe body. The air guide and the pipe body surround the air guide cavity. The air guide cavity has a decreasing trend from the pipe body to the spray hole along the radial direction of the pipe body. The air hole is connected to the air guide cavity.

5. The strip steel drying apparatus according to claim 3, characterized in that, The drying mechanism includes a housing, which encloses the drying chamber, and the connecting part is installed in the housing.

6. The strip steel drying apparatus according to claim 5, characterized in that, The spray pipe also includes an end, which is disposed at one end of the spray section away from the connecting section. The end is rotatably connected to the spray section and is connected to the side of the housing away from the drying chamber.

7. The strip steel drying apparatus according to claim 6, characterized in that, The end is provided with a door structure, which is used to open and close the spray section.

8. The strip steel drying apparatus according to claim 2, characterized in that, The plurality of injection pipes includes a first group of injection pipes and a second group of injection pipes arranged along a third direction, with the strip steel disposed between the first group of injection pipes and the second group of injection pipes, and the first direction, the second direction and the third direction intersecting each other.

9. The strip steel drying apparatus according to claim 1, characterized in that, The heat exchange mechanism includes a first heat exchange channel and a second heat exchange channel. The first heat exchange channel is connected to the air outlet, and the second heat exchange channel is used to connect to the heat source.

10. The strip steel drying apparatus according to claim 9, characterized in that, It also includes a temperature detection element and a switch element, wherein the temperature detection element is disposed in the drying chamber and is used to detect the temperature value of the drying chamber; The switching element is disposed in the second heat exchange channel, and the switching element is configured to adjust the opening of the second heat exchange channel based on the temperature value detected by the temperature detection element.

11. A strip steel production equipment, characterized in that, The strip drying apparatus includes any one of claims 1 to 10.

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