Drying equipment with soaking circulation system

Abstract

The utility model belongs to the technical field of drying, and discloses drying equipment with a soaking circulation system, which comprises a furnace body and the soaking circulation system. The furnace body comprises an upper heating space and a lower heating space, a product is arranged between the upper heating space and the lower heating space, and heat in the upper heating space and heat in the lower heating space are both used for heating the product; the soaking circulation system comprises a mixing pipeline, an upper flow suction pipeline, an upper flow blowing pipeline, a lower flow suction pipeline, a lower flow blowing pipeline and a power device; the upper flow suction pipeline and the lower flow suction pipeline are both communicated with the mixing pipeline; the power device is used for providing power for circulation of the fluid in the mixing pipeline, the upper flow suction pipeline and the upper flow blowing pipeline and used for providing power for circulation of the fluid in the mixing pipeline, the lower flow suction pipeline and the upper flow blowing pipeline. The heat difference of the two sides of the product in the thickness direction can be reduced, the drying effect of the two surfaces of the product is improved, and the product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of drying technology, and in particular to a drying device with a uniform heat circulation system. Background Technology

[0002] The insulating coatings on the surface of grain-oriented silicon steel mainly fall into three categories: inorganic coatings, organic coatings, and semi-inorganic coatings. The coatings on the surface of grain-oriented silicon steel are typically dried in a drying oven.

[0003] In existing technology, the drying furnace has an inner cavity. Grain-oriented silicon steel passes through the drying furnace without contact by being unwound and rewound by tension rollers outside the furnace inlet and outlet. Burners are installed on the inner wall of the drying furnace. To ensure the drying effect on both the upper and lower surfaces of the grain-oriented silicon steel, burners are installed on both the top and bottom walls of the drying furnace. The grain-oriented silicon steel is suspended in the drying furnace and heated by the flue gas and infrared radiation generated by the burners. To improve heat utilization and ensure thermal uniformity in the width direction within the furnace, the width of the grain-oriented silicon steel is kept relatively close to the width of the drying furnace, allowing the infrared radiation from the burners to completely cover the width of the grain-oriented silicon steel. There is no significant temperature difference between the edges of the grain-oriented silicon steel and the inner sidewalls of the furnace. The grain-oriented silicon steel divides the drying furnace into two drying spaces. The heat in the two drying spaces typically does not mix. Due to the influence of the external environment of the drying furnace (e.g., external airflow entering the furnace from the gaps on both sides and the inlets and outlets at both ends), the heat difference between the two drying spaces is significant. This leads to inconsistent drying effects on the two surfaces of the grain-oriented silicon steel, resulting in the coating on one surface drying to the required level while the coating on the other surface is not completely dry, thus affecting the quality of the grain-oriented silicon steel.

[0004] Therefore, there is an urgent need for a drying device with a uniform heat circulation system to solve the above problems. Utility Model Content

[0005] The first objective of this invention is to provide a drying device with a uniform heat circulation system to solve the problem of large heat difference between the two sides of the product in the prior art.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] Drying equipment with a heat equalization circulation system includes:

[0008] The furnace body includes an upper heating space and a lower heating space, and the product is disposed between the upper heating space and the lower heating space. The heat in both the upper heating space and the lower heating space is used to heat the product.

[0009] A heat exchange circulation system includes a mixing pipe, an upper suction pipe, an upper blowing pipe, a lower suction pipe, a lower blowing pipe, and a power unit; the upper suction pipe and the lower suction pipe are both connected to the mixing pipe; the upper suction pipe and the upper blowing pipe are both located in the upper heating space and are both connected to the upper heating space; the lower suction pipe and the lower blowing pipe are both located in the lower heating space and are both connected to the lower heating space; the power unit is used to provide power for the circulation of fluid in the mixing pipe, the upper suction pipe, and the upper blowing pipe, and to provide power for the circulation of fluid in the mixing pipe, the lower suction pipe, and the upper blowing pipe.

[0010] Optionally, the upper suction pipe and the upper blowing pipe are both located on the inner top wall of the furnace body; the lower suction pipe and the lower blowing pipe are both located on the inner bottom wall of the furnace body.

[0011] Optionally, the upper suction pipe and the upper blowing pipe are arranged opposite to each other in the length direction of the furnace body, and both extend in the width direction of the furnace body;

[0012] And / or, the lower suction pipe and the lower blowing pipe are arranged opposite to each other in the length direction of the furnace body, and both extend in the width direction of the furnace body;

[0013] And / or, the upper suction pipe and the lower suction pipe are arranged opposite to each other in the height direction of the furnace body, and the upper blowing pipe and the lower blowing pipe are arranged opposite to each other in the height direction of the furnace body;

[0014] And / or, the upper suction pipe and the lower blowing pipe are arranged opposite each other in the height direction of the furnace body.

[0015] Optionally, both the upper suction pipe and the lower suction pipe are provided with multiple suction ports, and both the upper blowing pipe and the lower blowing pipe are provided with multiple blowing ports;

[0016] The sum of the flow areas of the plurality of suction ports of the upper suction pipe is greater than the sum of the plurality of blowing ports of the upper blowing pipe; and / or, the sum of the flow areas of the plurality of suction ports of the lower suction pipe is greater than the sum of the plurality of blowing ports of the lower blowing pipe.

[0017] Optionally, both the upper suction pipe and the lower suction pipe are provided with a first inclined sidewall, the first inclined sidewall facing the product inside the furnace, and the first inclined sidewall is provided with the suction port;

[0018] Both the upper and lower blowing pipes are provided with a second inclined sidewall, which faces the product inside the furnace. The second inclined sidewall is provided with the blowing port.

[0019] Optionally, the angle between the plane containing the first inclined sidewall and the plane containing the product is 40°-50°; the angle between the plane containing the second inclined sidewall and the plane containing the product is 40°-50°.

[0020] Optionally, multiple upper heating spaces and multiple lower heating spaces are provided along the length of the furnace body, multiple heat equalization circulation systems are provided, multiple upper suction pipes and multiple upper blowing pipes are provided in multiple upper heating spaces, and multiple lower suction pipes and multiple lower blowing pipes are provided in multiple lower heating spaces.

[0021] Optionally, the drying equipment with a uniform heat circulation system further includes heaters, with heaters provided at the top and bottom of the furnace body. The heater at the top of the furnace body is used to release heat to the upper heating space, and the heater at the bottom of the furnace body is used to release heat to the lower heating space.

[0022] Along the length of the furnace body, the upper suction pipe and the upper blowing pipe are located on both sides of the corresponding heater, and the lower suction pipe and the lower blowing pipe are located on both sides of the corresponding heater.

[0023] Optionally, the power unit includes a fan with one inlet and two outlets. The inlet of the fan is connected to the mixing pipe, one outlet of the fan is connected to the upper blowing pipe, and the other outlet of the fan is connected to the lower blowing pipe.

[0024] Optionally, the heat exchange circulation system further includes a drain pipe and a control valve disposed on the drain pipe. One end of the drain pipe is connected to the mixing pipe, and the other end of the drain pipe extends to the outside of the furnace body. The power unit is used to draw air from outside the furnace body to the mixing pipe through the drain pipe, and the control valve is configured to adjust the flow area of ​​the drain pipe.

[0025] The beneficial effects of this utility model are:

[0026] This invention provides a drying device with a uniform heating circulation system. The power unit provides power for the circulating flow of fluid in a mixing pipe, a lower suction pipe, and an upper blowing pipe. The fluid is absorbed in the upper heating space through the upper suction pipe and driven to the mixing pipe, and in the lower suction pipe, it is absorbed in the lower heating space and driven to the mixing pipe. The fluids in the upper and lower heating spaces are mixed in the mixing pipe. The power unit then re-inputs the mixed fluid into the upper heating space through the upper blowing pipe and into the lower heating space through the lower blowing pipe. This ensures that the temperature and heat of the fluids in the upper and lower heating spaces are essentially the same, thereby reducing the heat difference between the two sides of the product's thickness direction, improving the drying effect on both surfaces of the product, and ensuring product quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 content of the embodiments of this utility model and these drawings without creative effort.

[0028] Figure 1 This is a first structural schematic diagram of a drying device with a uniform heat circulation system provided in an embodiment of the present invention;

[0029] Figure 2 This is a side view of a drying device with a uniform heat circulation system provided in an embodiment of the present invention;

[0030] Figure 3 This is a first cross-sectional view of a drying device with a uniform heat circulation system provided in an embodiment of the present invention;

[0031] Figure 4 This is a second cross-sectional view of the drying equipment with a uniform heat circulation system provided in this embodiment of the present invention;

[0032] Figure 5 This is a utility model Figure 4 The enlarged view of point A shown;

[0033] Figure 6 This is a schematic diagram of the heat dissipation circulation system provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the upward blowing pipe provided in this embodiment of the utility model;

[0035] Figure 8 This is a utility model Figure 7 The BB section view shown;

[0036] Figure 9 This is a front view of the heat exchange circulation system provided in this embodiment of the utility model;

[0037] Figure 10 This is a top view of the heat exchange circulation system provided in this embodiment of the utility model;

[0038] Figure 11 This is a second structural schematic diagram of a drying device with a uniform heat circulation system provided in an embodiment of this utility model;

[0039] Figure 12 This is a third structural schematic diagram of a drying device with a uniform heat circulation system provided in an embodiment of this utility model.

[0040] In the picture:

[0041] 100. Furnace body; 110. Upper heating space; 120. Lower heating space; 200. Heat equalization circulation system; 210. Mixing pipe; 220. Upper suction pipe; 221. Suction port; 222. First inclined sidewall; 223. Third end; 224. Fourth end; 230. Upper blowing pipe; 231. Blowing port; 232. Second inclined sidewall; 233. First end; 234. Second end; 240. Lower suction pipe; 250. Lower blowing pipe; 260. Power unit; 270. Second connecting pipe; 271. First pipe section; 272. Second pipe section; 280. First connecting pipe; 300. Heater; 400. Drain pipe; 500. Control valve; 600. Lifting mechanism; 700. Supporting component; 800. Rotating mechanism;

[0042] 1. Product; Y, First Direction; X, Second Direction; Z, Third Direction. Detailed Implementation

[0043] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0049] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0050] This embodiment provides a drying device with a uniform heat circulation system for drying products. It can reduce the heat difference between the two sides of the product, improve the drying effect of the two surfaces of the product, and ensure the quality of the product.

[0051] For example, the product can be a sheet-like structure such as a steel strip. The product can be conveyed by a conveying mechanism into a drying device with a uniform heat circulation system for drying. The product can be continuously conveyed into the furnace body, entering from one end and exiting from the other end.

[0052] like Figures 1 to 12 As shown, the drying equipment with a homogenizing circulation system includes a furnace body 100 and a homogenizing circulation system 200. The furnace body 100 includes an upper heating space 110 and a lower heating space 120. The upper heating space 110 and the lower heating space 120 are spaced apart along the height of the furnace body 100. A product 1 is disposed between the upper heating space 110 and the lower heating space 120. In some embodiments, the product 1 divides the interior of the furnace body 100 to form the upper heating space 110 and the lower heating space 120.

[0053] In this embodiment, the heat in both the upper heating space 110 and the lower heating space 120 is used to heat the product 1. For example, the heat in the upper heating space 110 is used to heat one surface of the product 1 in the thickness direction, and the heat in the lower heating space 120 is used to heat another surface of the product 1 in the thickness direction, thereby achieving the heating and drying of the product 1.

[0054] For example, such as Figures 4 to 6 As shown, the heat exchange circulation system 200 in this embodiment includes a mixing pipe 210, an upper suction pipe 220, an upper blowing pipe 230, a lower suction pipe 240, a lower blowing pipe 250, and a power unit 260.

[0055] Both the upper suction pipe 220 and the lower suction pipe 240 are connected to the mixing pipe 210. Both the upper suction pipe 220 and the upper blowing pipe 230 are located in and connected to the upper heating space 110; that is, the upper suction pipe 220 connects the upper heating space 110 and the mixing pipe 210. Both the lower suction pipe 240 and the lower blowing pipe 250 are located in and connected to the lower heating space 120; that is, the lower suction pipe 240 connects the lower heating space 120 and the mixing pipe 210.

[0056] The power unit 260 is used to provide power for the circulating flow of fluid in the mixing pipe 210, the upper suction pipe 220 and the upper blowing pipe 230, and to provide power for the circulating flow of fluid in the mixing pipe 210, the lower suction pipe 240 and the upper blowing pipe 230, so as to absorb fluid in the upper heating space 110 through the upper suction pipe 220 and drive it to the mixing pipe 210, and absorb fluid in the lower heating space 120 through the lower suction pipe 240 and drive it to the mixing pipe 210. The fluids in the upper heating space 110 and the lower heating space 120 are mixed in the mixing pipe 210. The power unit 260 re-inputs the mixed fluids into the upper heating space 110 through the upper blowing pipe 230 and into the lower heating space 120 through the lower blowing pipe 250. This makes the temperature and heat of the fluids in the upper heating space 110 and the lower heating space 120 basically the same, thereby reducing the heat difference on both sides of the product 1 in the thickness direction, improving the consistency of the drying effect on the two surfaces of the product 1, and ensuring the quality of the product 1.

[0057] For ease of explanation, in this embodiment, as... Figures 2 to 4 As shown, the length direction of the furnace body 100 is called the first direction Y, the width direction of the furnace body 100 is called the second direction X, and the height direction of the furnace body 100 is called the third direction Z.

[0058] For example, such as Figure 5 As shown, the upper suction pipe 220 and the upper blowing pipe 230 are both located on the inner top wall of the furnace body 100, while the lower suction pipe 240 and the lower blowing pipe 250 are both located on the inner bottom wall of the furnace body 100. This facilitates the installation of the upper suction pipe 220, upper blowing pipe 230, lower suction pipe 240, and lower blowing pipe 250, improves their stability within the furnace body 100, and prevents shaking. Furthermore, this arrangement allows for a larger distance between the upper blowing pipe 230 and the lower blowing pipe 250 and the product 1, preventing damage to the product 1 due to excessively high temperatures of the fluids blown out by the upper blowing pipe 230 and the lower blowing pipe 250, and improving the reliability of the drying equipment with a uniform heat circulation system.

[0059] In some alternative embodiments, such as Figure 6 and Figure 7 As shown, both the upper suction pipe 220 and the lower suction pipe 240 are provided with multiple suction ports 221, through which fluid is drawn from the upper heating space 110 and the lower heating space 120. Both the upper blowing pipe 230 and the lower blowing pipe 250 are provided with multiple blowing ports 231, through which the mixed fluid is blown into the upper heating space 110 and the lower heating space 120.

[0060] For example, such as Figure 5 As shown, the upper suction pipe 220 and the upper blowing pipe 230 are arranged opposite each other along the length of the furnace body 100 and both extend along the width direction (i.e., the second direction X) of the furnace body 100. Thus, the upper suction pipe 220 has a larger area for the suction port 221, improving suction efficiency and enabling it to draw fluid from various regions of the upper heating space 110 along the width direction of the furnace body 100, further improving suction efficiency. The upper blowing pipe 230 has a larger area, improving blowing efficiency, and extends along the width direction of the furnace body 100, which is the same as the width direction of the product 1. This allows the upper blowing pipe 230 to uniformly blow high-temperature fluid onto one surface of the product 1 along the width direction of the product 1, improving the uniformity of heating that surface.

[0061] Similarly, the lower suction pipe 240 and the lower blowing pipe 250 are arranged opposite each other in the length direction of the furnace body 100 and both extend in the width direction of the furnace body 100 to improve the suction efficiency and the uniformity of heating the other surface of the product 1.

[0062] In some alternative embodiments, please continue to refer to Figure 5 The upper suction pipe 220 and the lower suction pipe 240 are arranged opposite each other in the height direction of the furnace body 100. The upper blowing pipe 230 and the lower blowing pipe 250 are also arranged opposite each other in the height direction of the furnace body 100. This facilitates the control of the temperature distribution inside the furnace body 100, and also facilitates the installation of the heat homogenization circulation system 200 when there are more than 200 heat homogenization circulation systems.

[0063] It is understandable that the upper suction pipe 220 and the lower blowing pipe 250 can also be arranged opposite each other in the height direction of the furnace body 100, and the upper blowing pipe 230 and the lower suction pipe 240 can be arranged opposite each other in the height direction of the furnace body 100. This embodiment does not limit this.

[0064] In some optional embodiments, the amount of fluid drawn into the upper suction pipe 220 (or lower suction pipe 240) per unit time through the suction port 221 is greater than or equal to the amount of fluid blown out of the upper blowing pipe 230 (or lower blowing pipe 250) per unit time through the blowing port 231. This ensures that the upper suction pipe 220 (or lower suction pipe 240) draws in sufficient airflow, thereby ensuring sufficient fluid in the mixing pipe 210. This allows the power unit 260 to pressurize the fluid in the mixing pipe 210, ensuring that the fluid blown out from the upper blowing pipe 230 (or lower blowing pipe 250) has a certain pressure to ensure contact with the product 1, thus improving the heating effect on the product 1. It should be noted that the fluid in this embodiment can be flue gas or hot gas.

[0065] Optionally, the sum of the flow areas of the multiple suction ports 221 of the upper suction pipe 220 is greater than the sum of the multiple blowing ports 231 of the upper blowing pipe 230; the sum of the flow areas of the multiple suction ports 221 of the lower suction pipe 240 is greater than the sum of the multiple blowing ports 231 of the lower blowing pipe 250. This allows for a larger inlet area of ​​the upper suction pipe 220 (or lower suction pipe 240), ensuring that more fluid can enter the upper suction pipe 220 (or lower suction pipe 240), and a larger outlet area of ​​the upper blowing pipe 230 (or lower blowing pipe 250), achieving high-pressure ejection of the fluid to ensure sufficient contact with the product 1 and achieve the desired effect.

[0066] To facilitate the setting of the suction port 221, such as Figure 5 and Figure 8 As shown, both the upper suction pipe 220 and the lower suction pipe 240 are provided with a first inclined sidewall 222. The first inclined sidewall 222 faces the product 1 inside the furnace body 100. The first inclined sidewall 222 is provided with a suction port 221. That is, multiple suction ports 221 are provided on the first inclined sidewall 222, so that the suction ports 221 have a large installation area.

[0067] In some optional embodiments, the angle between the plane containing the first inclined sidewall 222 and the plane containing the product 1 is 40°-50°. For example, the angle between the plane containing the first inclined sidewall 222 and the plane containing the aquatic product 1 is 40°, 42°, 45°, 48°, or 50°.

[0068] Similarly, in order to facilitate the setting of the blowing port 231, both the upper blowing pipe 230 and the lower blowing pipe 250 are provided with a second inclined sidewall 232. The second inclined sidewall 232 faces the product 1 inside the furnace body 100 and is provided with a blowing port 231.

[0069] In some optional embodiments, the angle between the plane containing the second inclined sidewall 232 and the plane containing the product 1 is 40°-50°. If the angle between the plane containing the second inclined sidewall 232 and the plane containing the product 1 is too large, the second inclined sidewall 232 will approach a vertical plane, resulting in a smaller area of ​​the second inclined sidewall 232, which in turn leads to a smaller arrangement area of ​​the suction port 221, thus affecting the amount of fluid blown out. Furthermore, the fluid blown out by the suction port 231 on the second inclined sidewall 232 will not be directed towards the product 1, affecting the heating efficiency of the product 1. If the angle between the plane containing the second inclined sidewall 232 and the plane containing the product 1 is too small, the second inclined sidewall 232 will approach a horizontal plane, also affecting the arrangement area of ​​the suction port 231, and the flue gas blown out by the suction port 231 of the second inclined sidewall 232 directly blowing onto the product 1 may burn the product 1. For example, as... Figure 8As shown, the angle b between the plane containing the second inclined sidewall 232 and the plane containing product 1 is 40°, 42°, 45°, 48°, and 50°. It should be noted that the product is plate-shaped, and the thickness direction of the product is vertical, that is, the top and bottom surfaces of the product are parallel to the horizontal plane.

[0070] The furnace body 100 is typically quite long. The product 1 moves within the furnace body 100 via conveyor transport. To improve drying efficiency, each region along the length of the furnace body 100 can heat and dry the product 1. To ensure uniform heating in each region, in this embodiment, multiple upper heating spaces 110 and lower heating spaces 120 are provided along the length of the furnace body 100 (i.e., the first direction Y), and corresponding upper heating spaces 110 and lower heating spaces 120 are arranged opposite each other in the height direction of the furnace body 100 (i.e., the third direction Z). Furthermore, as... Figure 1 As shown, multiple homogenization circulation systems 200 are provided. Each homogenization circulation system 200 includes an upper suction pipe 220, a mixing pipe 210, a lower suction pipe 240, an upper blowing pipe 230, and a lower blowing pipe 250. The multiple upper suction pipes 220 and multiple upper blowing pipes 230 are correspondingly located in multiple upper heating spaces 110, and the multiple lower suction pipes 240 and multiple lower blowing pipes 250 are correspondingly located in multiple lower heating spaces 120. In this way, the temperatures in each corresponding upper heating space 110 and lower heating space 120 are approximately the same, thereby resulting in a more uniform heating effect on product 1 and preventing a situation where the temperature of one surface is higher than that of another surface.

[0071] Optionally, such as Figure 5 As shown, the drying equipment with a uniform heat circulation system also includes a heater 300. Heaters 300 are provided at both the top and bottom of the furnace body 100. The heater 300 at the top of the furnace body 100 releases heat to the upward heating space 110, and the heater 300 at the bottom of the furnace body 100 releases heat to the downward heating space 120. Exemplarily, the heater 300 in this embodiment can be a porous media burner, which releases high-temperature flue gas into the corresponding upper heating space 110 or lower heating space 120. The fluid in both the upper heating space 110 and the lower heating space 120 can be flue gas.

[0072] It should be noted that when there are multiple upper heating spaces 110, each upper heating space 110 is provided with at least one heater 300. When there are multiple lower heating spaces 120, each lower heating space 120 is provided with at least one heater 300.

[0073] In this embodiment, along the length direction (i.e., the first direction Y) of the furnace body 100, the upper suction pipe 220 and the upper blowing pipe 230 are located on both sides of the corresponding heater 300, and the lower suction pipe 240 and the lower blowing pipe 250 are located on both sides of the corresponding heater 300. This avoids direct contact between the high-temperature heat generated by the heater 300 and the surface of the product 1, preventing damage to the product 1, ensuring the quality of the product 1, and improving the reliability of the drying equipment with a uniform heat circulation system.

[0074] In this embodiment, as Figure 4 As shown, both the first inclined sidewall 222 and the second inclined sidewall 232 are oriented towards the corresponding heater 300, so that the fluid (i.e., flue gas) blown out from the blowout port 231 can mix with the high-temperature flue gas released by the porous media burner, thereby reducing the temperature of the high-temperature flue gas and further preventing the high-temperature flue gas from directly contacting the product 1, thus further improving reliability. The second inclined sidewall 232 is oriented towards the corresponding heater 300, so that the suction port 221 is oriented towards the corresponding heater 300, which can draw as much heat released by the porous media burner as possible to the suction port 221, thereby reducing the probability of the high-temperature flue gas directly contacting the product 1.

[0075] For example, the power unit 260 includes a fan (not shown in the figure). The fan has one inlet and two outlets. The fan inlet is connected to the mixing pipe 210, one outlet is connected to the upper blowing pipe 230, and the other outlet is connected to the lower blowing pipe 250, enabling the fluid in the mixing pipe 210 to be pressurized to the upper blowing pipe 230 and the lower blowing pipe 250. In this embodiment, fluid is supplied to both blowing pipes using a single fan, reducing the cost of drying equipment with a heat equalization circulation system and improving the fan utilization rate.

[0076] For example, such as Figure 10 As shown, the upward blowing pipe 230 has a first end 233 in the extending direction and a second end 234 disposed opposite to the first end 233, with the first end 233 being closer to the mixing pipe 210 relative to the second end 234.

[0077] In some optional embodiments, the flow area of ​​the upward blowing pipe 230 gradually increases along the direction from the second end 234 to the first end 233; that is, the upward blowing pipe 230 is a tapering pipe along the direction from the first end 233 to the second end 234. The flow area of ​​the upward blowing pipe 230 is the longitudinal cross-sectional area of ​​the inner cavity of the upward blowing pipe 230. Since the upward blowing pipe 230 extends along the width direction (i.e., the second direction X) of the furnace body 100, the pressure at each position of the upward blowing pipe 230 along the width direction (i.e., the second direction X) of the furnace body 100 is consistent, ensuring the uniformity of the fluid blown into the furnace body 100, thereby ensuring the uniformity of the fluid distribution within the furnace body 100, improving the heating effect on product 1, and avoiding the situation where the second end 234, which is far from the power device 260, experiences a reduction in flue gas flow due to insufficient gas pressure. It should be noted that in this embodiment, the orifices 231 of the multiple blowing ports have the same diameter.

[0078] In some alternative embodiments, such as Figure 10 As shown, the upper suction pipe 220 has a third end 223 in the extending direction (i.e., the second direction X) and a fourth end 224 disposed opposite to the third end 223, wherein the third end 223 is closer to the mixing pipe 210 relative to the fourth end 224.

[0079] In this embodiment, the flow area of ​​the upper suction pipe 220 gradually increases along the direction from the fourth end 224 to the third end 223; that is, the upper suction pipe 220 is a tapering pipe along the direction from the third end 223 to the fourth end 224. The flow area of ​​the upper suction pipe 220 is the total cross-sectional area of ​​its inner cavity. This ensures that the suction force of the upper suction pipe 220 is consistent at all positions along the second direction X, guaranteeing that all high-temperature flue gas near the upper suction pipe 220 is drawn into it, reducing the probability of high-temperature flue gas leakage and preventing the fourth end 224, which is far from the power device 260, from failing to effectively extract high-temperature flue gas due to insufficient suction force, thus improving the efficiency of flue gas circulation. It should be noted that in this embodiment, the orifices of the multiple suction ports 221 are identical.

[0080] In some alternative embodiments, the flow area of ​​the upward blowing pipe 230 is the same along the direction from the second end 234 to the first end 233, and the flow area of ​​the blowing port 231 gradually decreases. This ensures that the pressure at all positions along the second direction X of the upward blowing pipe 230 is consistent, guaranteeing the uniformity of the flue gas blown into the furnace body 100, thereby ensuring the uniformity of flue gas distribution within the furnace body 100, improving the heating effect on the product 1, and preventing a reduction in flue gas flow due to insufficient gas pressure at the second end 234, which is farther from the power unit 260.

[0081] In some alternative embodiments, the flow area of ​​the upper suction pipe 220 is the same from the fourth end 224 to the third end 223, and the flow area of ​​the suction port 221 gradually decreases. This ensures that the suction force of the upper suction pipe 220 is consistent at all positions along the second direction X, guaranteeing that all high-temperature flue gas near the upper suction pipe 220 in the furnace body 100 is drawn into the upper suction pipe 220, reducing the probability of high-temperature flue gas leakage, and preventing the fourth end 224, which is far from the power unit 260, from failing to effectively extract high-temperature flue gas due to insufficient suction force, thus improving the efficiency of flue gas circulation.

[0082] Optionally, the length of the upper suction pipe 220 in the second direction X is greater than the length of the product 1 in the second direction X, and the orthographic projection of the upper suction pipe 220 on the product 1 penetrates the product 1, to prevent high-temperature flue gas from being directly blown onto the product 1. Similarly, the length of the upper blowing pipe 230 in the second direction X is greater than the length of the product 1 in the second direction X, and the orthographic projection of the upper blowing pipe 230 on the product 1 penetrates the product 1, so that the flue gas blown out by the upper blowing pipe 230 can evenly contact various positions of the product 1 in the second direction X, thereby ensuring the heating effect on the product 1.

[0083] For example, such as Figure 6 or Figure 9 As shown, the heat exchange circulation system 200 also includes two support members 700. One support member 700 has one end connected to the second end 234 of the upward blowing pipe 230 and the other end connected to the furnace body 100, so as to more firmly fix the upward blowing pipe 230 to the furnace body 100 and further improve the stability of the upward blowing pipe 230. The other support member 700 has one end connected to the fourth end 224 of the upward suction pipe 220 and the other end connected to the furnace body 100, so as to more firmly fix the upward suction pipe 220 to the furnace body 100 and further improve the stability of the upward suction pipe 220.

[0084] Optionally, the load-bearing member 700 can be a hanger or other rod-like structure.

[0085] For example, as shown in the figure, the heat exchange circulation system 200 also includes a first connecting pipe 280. The first connecting pipe 280 connects the mixing pipe 210 and the upper suction pipe 220, and the upper suction pipe 220 and the first connecting pipe 280 are detachably connected. By providing the first connecting pipe 280, communication between the mixing pipe 210 and the upper suction pipe 220 can be achieved; furthermore, it facilitates the disassembly, cleaning, or replacement of the upper suction pipe 220. For example, the mixing pipe 210 is located outside the furnace body 100, the first connecting pipe 280 passes through the furnace body 100, and the connection point between the upper suction pipe 220 and the first connecting pipe 280 can be located inside the furnace body 100 to facilitate the disassembly of the first connecting pipe 280 and the upper suction pipe 220. Of course, it is understood that the first connecting pipe 280 can also be located outside the furnace body 100, with the upper suction pipe 220 passing through the furnace body 100 and connecting to the first connecting pipe 280, which also facilitates the disassembly of the upper suction pipe 220. Since the upper suction pipe 220 is used to draw smoke through the suction port 221, the suction port 221 may become clogged after prolonged use, affecting the uniformity of smoke extraction. Therefore, by providing an easily removable upper suction pipe 220, maintenance efficiency can be improved. Similarly, a first connecting pipe 280 may also be provided between the lower suction pipe 240 and the mixing pipe 210; this embodiment does not limit this.

[0086] Optionally, such as Figure 1 As shown, the heat exchange circulation system 200 also includes a second connecting pipe 270. The second connecting pipe 270 connects the mixing pipe 210 and the upward blowing pipe 230, and the upward blowing pipe 230 and the second connecting pipe 270 are detachably connected. By providing the second connecting pipe 270, communication between the mixing pipe 210 and the upward blowing pipe 230 can be achieved; furthermore, it facilitates the disassembly, cleaning, or replacement of the upward blowing pipe 230. For example, the mixing pipe 210 is located outside the furnace body 100, the second connecting pipe 270 passes through the furnace body 100, and the connection point between the upward blowing pipe 230 and the second connecting pipe 270 can be located inside the furnace body 100, facilitating the disassembly of the second connecting pipe 270 and the upward blowing pipe 230. Of course, it is understood that the second connecting pipe 270 can also be located outside the furnace body 100, with the upward blowing pipe 230 passing through the furnace body 100 and connecting to the second connecting pipe 270, which also facilitates the disassembly of the upward blowing pipe 230. Since the flue pipe is used to blow smoke through the blow port 231, the blow port 231 may become blocked after long-term use, affecting the uniformity of smoke blowing. Therefore, by setting an easy-to-disassemble upper blow pipe 230, maintenance efficiency can be improved.

[0087] In some optional embodiments, the second connecting pipe 270 is L-shaped and includes a first pipe section 271 and a second pipe section 272. One end of the first pipe section 271 is connected to the mixing pipe 210, and the end of the second pipe section 272 opposite to the first pipe section 271 is connected to the upward blowing pipe 230. This ensures that the upward suction pipe 220 and the upward blowing pipe 230 are located on both sides of the porous medium burner in the first direction Y. The first connecting pipe 280 is straight, so that the mixing pipe 210 and the power unit 260 are close to the upward suction pipe 220, thereby allowing the upward suction pipe 220 to have a large suction force to ensure that as much high-temperature flue gas as possible is drawn in.

[0088] In this embodiment, the drying equipment with a uniform heat circulation system further includes a lifting mechanism 600 and a rotating mechanism 800. Both the lifting mechanism 600 and the rotating mechanism 800 are located outside the furnace body 100 and are used to cooperate in lifting the porous media burner. Specifically, the lifting mechanism 600 includes a cylinder, the output end of which is rotatably connected to the middle of one side of the porous media burner in the width direction, and one end of the porous media burner in the length direction is rotatably mounted on the rotating mechanism 800, which includes, but is not limited to, a rotating shaft. When the output end of the cylinder extends or retracts, it can drive the porous media burner to rotate relative to the rotating mechanism 800, thereby realizing the switching between the working position and the lifting position. When the porous media burner is in the working position, such as... Figure 11 and Figure 5 As shown, the combustion surface of the porous media burner faces the product 1 inside the furnace body 100; when the porous media burner is in the raised position, as... Figure 12 As shown, the porous media burner is located outside the furnace body 100 and is either vertical or inclined for easy inspection and maintenance. It should be noted that the porous media burners can be arranged in groups, with each group corresponding to at least one lifting mechanism 600, and they can be lifted simultaneously to improve lifting efficiency.

[0089] For example, the second pipe segment 272 is located outside the furnace body 100 and extends along the second direction X. The configuration of the second pipe segment 272 provides installation space for the lifting mechanism 600. Specifically, the lifting mechanism 600, located on the same side of the furnace body 100 as the first pipe segment 271, is disposed on the side of the first pipe segment 271 facing the furnace body 100, in order to shorten the torque required by the lifting mechanism 600 to drive the porous media burner to lift, thereby ensuring lifting stability.

[0090] Optionally, the flow area of ​​the second connecting pipe 270 is larger than that of the upward blowing pipe 230, so that when the flue gas flows from the second connecting pipe 270 to the upward blowing pipe 230, the flow area will decrease. According to the principle of energy conservation, the flue gas can be pressurized to ensure the flow rate of the flue gas blown out of the smoke hole, so that the flue gas can contact the product 1 and ensure the heating effect.

[0091] Similarly, a second connecting pipe 270 may also be provided between the downflow pipe 250 and the mixing pipe 210, which will not be described in detail here.

[0092] In some optional embodiments, the amount of fluid drawn into the upper suction pipe 220 per unit time through the suction port 221 is greater than or equal to the amount of fluid blown out of the upper blowing pipe 230 per unit time through the blowing port 231. This ensures that the upper suction pipe 220 draws in sufficient airflow, thereby providing sufficient air pressure when blowing through the upper blowing pipe 230. This allows for better heating of product 1 without burning it. It should be noted that the fluid in this embodiment can be flue gas.

[0093] There are various ways to control the amount of fluid drawn into the upper suction pipe 220 per unit time to be greater than or equal to the amount of fluid blown out through the blow port 231 per unit time. For example, this can be achieved by controlling the areas of the suction port 221 and the blow port 231.

[0094] For example, the sum of the flow areas of the multiple suction ports 221 on the upper suction pipe 220 is greater than the sum of the flow areas of the multiple blowing ports 231 on the upper suction pipe 220, so that the inlet area of ​​the upper suction pipe 220 can be larger, thereby ensuring that more flue gas can enter the upper suction pipe 220. The outlet area of ​​the upper blowing pipe 230 is larger, so as to achieve high-pressure ejection of flue gas, so as to fully contact the product 1 and achieve the ideal effect.

[0095] Alternatively, the sum of the flow areas of the multiple suction ports 221 can be made greater than the sum of the flow areas of the multiple blowing ports 231 by controlling the number of suction ports 221 and blowing ports 231. In this case, as... Figure 6 As shown, the area of ​​the first inclined sidewall 222 with multiple blowing ports 231 is smaller than the area of ​​the second inclined sidewall 232 with multiple suction ports 221, so that the suction ports 221 have a larger arrangement area, and thus more suction ports 221 can be set.

[0096] In some alternative embodiments, the vertical cross-section of the upper suction duct 220 is larger than that of the upper blowing duct 230. Thus, the upper suction duct 220 can carry more flue gas than the upper blowing duct 230, thereby increasing the amount of flue gas flowing through the upper suction duct 220 into the mixing duct 210, and ensuring that the flue gas is ejected from the upper blowing duct 230 at high pressure.

[0097] Optionally, such as Figure 6 and Figure 9As shown, the heat exchange circulation system 200 also includes a diversion pipe 400 and a control valve 500 disposed on the diversion pipe 400. One end of the diversion pipe 400 is connected to the mixing pipe 210, and the other end extends to the outside of the furnace body 100. The power unit 260 is configured to draw air from outside the furnace body 100 to the mixing pipe 210 through the diversion pipe 400, and the control valve 500 is configured to adjust the flow area of ​​the diversion pipe 400. When the flow area of ​​the diversion pipe 400 is not zero, air from outside the furnace body 100 can enter the mixing pipe 210 through the diversion pipe 400 and mix with the flue gas inside the mixing pipe 210. When the flow area of ​​the diversion pipe 400 is zero, air from outside the furnace body 100 cannot enter the mixing pipe 210 through the diversion pipe 400.

[0098] During the operation of the heating equipment, when encountering abnormal production processes or shearing / coiling changes, the running speed of product 1 within the furnace body 100 will decrease. To prevent overheating of product 1, the heating power of the heating equipment needs to be reduced as quickly as possible. However, when product 1 returns to its normal speed, the heating power needs to be restored to its normal value as quickly as possible. However, the furnace body 100 is typically composed of an external steel structure shell and internal insulation material. During the cooling and heating processes of the furnace body 100, the heat storage capacity of the insulation material is a significant limiting factor, which can be understood as a kind of "thermal inertia," that is, the prolonged cooling process.

[0099] In this embodiment, by setting up the diversion pipe 400, when rapid cooling is required inside the furnace body 100, the control valve 500 is opened to the appropriate degree. Through the suction force of the power device 260 (e.g., a fan), air is drawn in from outside the furnace body 100 through the diversion pipe 400 and sent into the furnace body 100 through the upper blowing pipe 230 and the lower blowing pipe 250, so that the temperature inside the furnace body 100 can be reduced rapidly, shortening the cooling process time.

[0100] Furthermore, the furnace body 100 is typically equipped with an exhaust pipe (not shown in the figure) to discharge the flue gas inside the furnace body 100. If no external air is introduced, only the amount of flue gas generated by the combustion of the porous medium heating element is discharged through the exhaust pipe. However, in this embodiment, by setting up a diversion pipe 400, cold air from outside the furnace body 100 can be introduced into the furnace body 100, so that the furnace body 100 contains not only flue gas but also introduced air. At this time, the exhaust volume of the exhaust pipe is the sum of the flue gas volume and the air volume, which increases the exhaust volume. The larger exhaust volume can remove more moisture from the furnace body 100, thereby reducing the humidity inside the furnace body 100. In other words, it achieves a rapid reduction in the moisture content of the atmosphere inside the furnace body 100.

[0101] It should be noted that when air from outside the furnace body 100 needs to be introduced through the drain pipe 400, the power of the power unit 260 (e.g., a fan) needs to be increased. If the power of the power unit 260 remains unchanged, the addition of outside air will reduce the amount of fluid drawn through the upper suction pipe 220 and the lower suction pipe 240, thus failing to achieve the goal of not burning the product 1.

[0102] In some optional embodiments, both the upper suction pipe 220 and the upper blowing pipe 230 can be polygonal pipes, or they can be arc-shaped pipes, elliptical pipes, etc. This embodiment does not limit them.

[0103] In this embodiment, the lower blowing pipe 250 is exactly the same as the upper blowing pipe 230, and will not be described again here. In this embodiment, the lower suction pipe 240 is exactly the same as the upper suction pipe 220, and will not be described again here.

[0104] The drying equipment with a uniform heat circulation system provided in this embodiment has an upper suction pipe 220 and an upper blowing pipe 230 installed on both sides of the furnace body 100. The suction force generated by the power unit 260 draws high-temperature flue gas through the upper suction pipe 220, avoiding direct contact with the surface of the product 1. The drawn high-temperature flue gas enters the mixing pipe 210 through the upper suction pipe 220 and the lower suction pipe 240. Under the action of the power unit 260, the flue gas is sent back into the furnace through the upper blowing pipe 230 and the lower blowing pipe 250. This achieves flue gas circulation and avoids energy waste. Furthermore, under the action of the power component 4 (e.g., a fan), the flue gas drawn in from all parts of the furnace body 100 in the width direction is fully mixed before being blown out into the furnace body 100, which can increase temperature uniformity.

[0105] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drying device with a uniform heat circulation system, characterized in that, include: The furnace body (100) includes an upper heating space (110) and a lower heating space (120). The product (1) is disposed between the upper heating space (110) and the lower heating space (120). The heat in the upper heating space (110) and the lower heating space (120) is used to heat the product (1). The heat exchange circulation system (200) includes a mixing pipe (210), an upper suction pipe (220), an upper blowing pipe (230), a lower suction pipe (240), a lower blowing pipe (250), and a power unit (260); the upper suction pipe (220) and the lower suction pipe (240) are both connected to the mixing pipe (210); the upper suction pipe (220) and the upper blowing pipe (230) are both located in the upper heating space (110) and are both connected to the upper heating space (110). The lower suction pipe (240) and the lower blowing pipe (250) are both located in the lower heating space (120) and are both connected to the lower heating space (120); the power unit (260) is used to provide power for the circulation of fluid in the mixing pipe (210), the upper suction pipe (220) and the upper blowing pipe (230), and to provide power for the circulation of fluid in the mixing pipe (210), the lower suction pipe (240) and the upper blowing pipe (230).

2. The drying equipment with a uniform heat circulation system according to claim 1, characterized in that, The upper suction pipe (220) and the upper blowing pipe (230) are both located on the inner top wall of the furnace body (100); the lower suction pipe (240) and the lower blowing pipe (250) are both located on the inner bottom wall of the furnace body (100).

3. The drying equipment with a uniform heat circulation system according to claim 1, characterized in that, The upper suction pipe (220) and the upper blowing pipe (230) are arranged opposite to each other in the length direction of the furnace body (100) and both extend in the width direction of the furnace body (100); And / or, the lower suction pipe (240) and the lower blowing pipe (250) are arranged opposite to each other in the length direction of the furnace body (100) and both extend in the width direction of the furnace body (100); And / or, the upper suction pipe (220) and the lower suction pipe (240) are arranged opposite to each other in the height direction of the furnace body (100), and the upper blowing pipe (230) and the lower blowing pipe (250) are arranged opposite to each other in the height direction of the furnace body (100); And / or, the upper suction pipe (220) and the lower blowing pipe (250) are arranged opposite to each other in the height direction of the furnace body (100), and the upper blowing pipe (230) and the lower suction pipe (240) are arranged opposite to each other in the height direction of the furnace body (100).

4. The drying equipment with a uniform heat circulation system according to claim 1, characterized in that, The upper suction pipe (220) and the lower suction pipe (240) are each provided with multiple suction ports (221), and the upper blowing pipe (230) and the lower blowing pipe (250) are each provided with multiple blowing ports (231). The sum of the flow areas of the plurality of suction ports (221) of the upper suction pipe (220) is greater than the sum of the plurality of blowing ports (231) of the upper blowing pipe (230); and / or, the sum of the flow areas of the plurality of suction ports (221) of the lower suction pipe (240) is greater than the sum of the plurality of blowing ports (231) of the lower blowing pipe (250).

5. The drying equipment with a uniform heat circulation system according to claim 4, characterized in that, Both the upper suction pipe (220) and the lower suction pipe (240) are provided with a first inclined sidewall (222), the first inclined sidewall (222) facing the product (1) inside the furnace body (100), and the first inclined sidewall (222) is provided with the suction port (221). Both the upper blowing pipe (230) and the lower blowing pipe (250) are provided with a second inclined sidewall (232), the second inclined sidewall (232) facing the product (1) inside the furnace body (100), and the second inclined sidewall (232) is provided with the blowing port (231).

6. The drying equipment with a uniform heat circulation system according to claim 5, characterized in that, The angle between the plane where the first inclined sidewall (222) is located and the plane where the product (1) is located is 40°-50°; the angle between the plane where the second inclined sidewall (232) is located and the plane where the product (1) is located is 40°-50°.

7. The drying equipment with a uniform heat circulation system according to any one of claims 1-4, characterized in that, The upper heating space (110) and the lower heating space (120) are provided in multiple ways along the length of the furnace body (100). The heat equalization circulation system (200) is provided in multiple ways. Multiple upper suction pipes (220) and multiple upper blowing pipes (230) are provided in multiple upper heating spaces (110), and multiple lower suction pipes (240) and multiple lower blowing pipes (250) are provided in multiple lower heating spaces (120).

8. The drying equipment with a uniform heat circulation system according to any one of claims 1-4, characterized in that, The drying equipment with a uniform heat circulation system further includes a heater (300). The top and bottom of the furnace body (100) are provided with heaters (300). The heater (300) at the top of the furnace body (100) is used to release heat to the upper heating space (110), and the heater (300) at the bottom of the furnace body (100) is used to release heat to the lower heating space (120). Along the length of the furnace body (100), the upper suction pipe (220) and the upper blowing pipe (230) are located on both sides of the corresponding heater (300), and the lower suction pipe (240) and the lower blowing pipe (250) are located on both sides of the corresponding heater (300).

9. The drying equipment with a uniform heat circulation system according to any one of claims 1-4, characterized in that, The power unit (260) includes a fan with an inlet and two outlets. The inlet of the fan is connected to the mixing pipe (210), one outlet of the fan is connected to the upward blowing pipe (230), and the other outlet of the fan is connected to the downward blowing pipe (250).

10. The drying equipment with a uniform heat circulation system according to any one of claims 1-4, characterized in that, The heat exchange circulation system (200) further includes a drain pipe (400) and a control valve (500) disposed on the drain pipe (400). One end of the drain pipe (400) is connected to the mixing pipe (210), and the other end of the drain pipe (400) extends to the outside of the furnace body (100). The power unit (260) is used to draw air from outside the furnace body (100) to the mixing pipe (210) through the drain pipe (400). The control valve (500) is configured to adjust the flow area of ​​the drain pipe (400).

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