Drying furnace and method for controlling operation thereof

Abstract

The present application belongs to the technical field of heating, and discloses a drying furnace and a running control method thereof. The drying furnace comprises a furnace body, a first cooling pipeline, a cooling adjusting valve and a first power component. The furnace body is provided with a first cooling interface. One end of the first cooling pipeline is connected to the first cooling interface and communicates with the inside of the furnace body through the first cooling interface. The cooling adjusting valve is arranged in the first cooling pipeline and is used for adjusting the flow area of the first cooling pipeline. The other end of the first cooling pipeline is connected to the first power component, and the first power component is used for inputting fluid into the furnace body through the first cooling pipeline. The present application can guarantee the quality of products, the sensor and other components installed on the furnace body will not be damaged due to high temperature, the stable operation of the drying furnace is ensured, and the operation cost of the drying furnace is reduced.

Description

Technical Field

[0001] This invention relates to the field of heating technology, and in particular to a drying oven and its operation control method. 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, a burner is installed inside the drying oven. The burner releases heat into the oven to heat the products inside, thus drying them. During abnormal production processes or shearing / coiling changes, the product's running speed drops to zero. To prevent overheating of products remaining in the oven, the temperature inside the oven needs to be rapidly reduced. However, existing burners cannot achieve adjustable power; they can only operate at a fixed power. Therefore, rapid cooling of the oven is achieved by rotating the burner to allow it to cool to the air. However, rotating the burner causes the high-temperature flue gas to significantly impact the cylinders driving the burner on both sides and the sensors mounted on the oven body, potentially damaging these components, affecting the stability of the drying oven's operation, and increasing operating costs. Summary of the Invention

[0004] The purpose of this invention is to provide a drying oven and its operation control method to solve the problems of poor stability and high operating costs in the prior art.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] A drying oven is provided, comprising:

[0007] The furnace body is provided with a first cooling interface;

[0008] The first cooling pipeline has one end connected to the first cooling interface and is connected to the interior of the furnace body through the first cooling interface.

[0009] A cooling regulating valve is provided in the first cooling pipeline and is used to adjust the flow area of ​​the first cooling pipeline.

[0010] The first power unit has the other end of the first cooling pipe connected to it, and the first power unit is used to input fluid into the furnace body through the first cooling pipe.

[0011] Optionally, one or more first cooling pipelines are provided, each first cooling pipeline corresponds to a first cooling interface on the furnace body, and each first cooling pipeline is provided with a cooling regulating valve;

[0012] When multiple first cooling pipelines are provided, the multiple first cooling pipelines are connected to the same first power component.

[0013] Optionally, the drying oven further includes a rapid cooling component, which includes a second power unit and a second cooling pipeline. The second power unit is installed in the oven body and has a disturbance structure located inside the oven body. One end of the second cooling pipeline is located outside the oven body and the other end is located inside the oven body, and it is used to selectively input fluid into the oven body. The disturbance structure is used to disturb the fluid input into the oven body through the second cooling pipeline.

[0014] Optionally, the top and bottom of the furnace body are provided with a plurality of the rapid cooling components, and the plurality of rapid cooling components at the top and bottom of the furnace body are spaced apart along the length of the furnace body.

[0015] Optionally, the drying oven further includes burner assemblies, with multiple burner assemblies provided at both the top and bottom of the oven body;

[0016] The rapid cooling assembly and the burner assembly at the top of the furnace body are alternately arranged along the length of the furnace body; the rapid cooling assembly and the burner assembly at the bottom of the furnace body are alternately arranged along the length of the furnace body.

[0017] Optionally, the burner assembly is rotatably connected to the furnace body, and the drying furnace further includes a lifting mechanism. Each burner assembly is connected to at least one lifting mechanism, which is used to drive the connected burner assembly to rotate relative to the furnace body.

[0018] Optionally, the drying oven further includes a flue gas emission system, which includes a main exhaust pipe, a branch exhaust pipe assembly, and a third power component;

[0019] The branch flue assembly includes a first flue and a second flue. The inlet of the first flue is connected to the furnace body, and the outlet of the first flue and the inlet of the second flue are spaced apart. The outlet of the second flue is connected to the main flue. The inlet of the third power component is connected to the main flue, and the third power component is used to draw the flue gas in the main flue.

[0020] Optionally, multiple branch flue pipe assemblies are provided, and each branch flue pipe assembly is provided with a flue gas regulating valve. The flue gas regulating valve is used to adjust the flow area of ​​the branch flue pipe assembly, and the multiple branch flue pipe assemblies are spaced apart along the length of the furnace body.

[0021] Optionally, the drying oven further includes a flue gas circulation system, which includes a manifold, a suction pipe, a blowing pipe, and a fourth power component;

[0022] A manifold cavity is installed in the furnace body; a suction pipe is connected to the manifold cavity and has multiple suction holes, and the suction pipe is located inside the furnace body; a blowing pipe is located inside the furnace body and is connected to the manifold cavity; the fourth power component is used to draw flue gas from the furnace body to the manifold cavity through the suction pipe, and to pressurize the flue gas in the manifold cavity into the furnace body through the blowing pipe.

[0023] Optionally, the flue gas recirculation system further includes a diversion pipe and a diversion regulating valve disposed on the diversion pipe. One end of the diversion pipe is connected to the manifold, and the other end of the diversion pipe extends to the outside of the furnace body. The fourth power unit is configured to draw air from outside the furnace body to the manifold through the diversion pipe, and the diversion regulating valve is configured to control the flow area of ​​the diversion pipe.

[0024] A method for controlling the operation of a drying oven is provided, applicable to the drying oven described above. The method for controlling the operation of the drying oven includes normal operation steps.

[0025] Normal operating procedures include:

[0026] Adjust the opening of the cooling regulating valve to 0 and control the first power component to be in the closed state;

[0027] The operation control method of the drying oven also includes a rapid cooling step;

[0028] The operation control method of the drying oven also includes a rapid cooling step;

[0029] Rapid cooling steps include:

[0030] S101. Determine whether the moving speed of the product inside the furnace is less than or equal to the speed setting value; if yes, proceed to step S102; if no, proceed to step S103.

[0031] S102. Adjust the opening of the cooling regulating valve to be greater than 0, and control the first power component to start, so that the first power component can introduce fluid into the furnace body through the first cooling pipeline and the first cooling interface, so as to reduce the temperature inside the furnace body.

[0032] S103. Adjust the opening degree of the cooling regulating valve to 0.

[0033] Optionally, the drying oven also includes a rapid cooling component, and the operation control method of the drying oven also includes a rapid cooling control step;

[0034] The rapid cooling control steps include:

[0035] The second cooling pipe is kept in a conductive state so that fluid outside the furnace can enter the furnace through the second cooling pipe;

[0036] The second power unit is activated so that the disturbance structure located inside the furnace disturbs the fluid entering the furnace through the second cooling pipeline.

[0037] Optionally, the drying oven also includes a flue gas emission system, and the operation control method of the drying oven also includes a flue gas control step;

[0038] Smoke control procedures include:

[0039] Adjust the opening of the flue gas regulating valve on the branch flue gas pipe assembly near the furnace inlet to be greater than the opening of the flue gas regulating valve on the branch flue gas pipe assembly near the furnace outlet.

[0040] Control the third power component to operate at a constant power.

[0041] Optionally, the drying oven also includes a flue gas recirculation system, and the operation control method of the drying oven also includes a flue gas recirculation control step;

[0042] The flue gas recirculation control steps include:

[0043] The fourth power unit is activated, which draws the flue gas in the furnace body to the manifold through the suction pipe, and then pushes the flue gas in the manifold back into the furnace body through the blow pipe to achieve flue gas circulation.

[0044] The flue gas recirculation system includes a diversion pipe and a control valve installed on the diversion pipe. The flue gas recirculation control steps also include:

[0045] S201. Determine whether the humidity inside the furnace is greater than the set humidity value. If yes, proceed to step 202; otherwise, proceed to step S203.

[0046] S202. Adjust the opening of the control valve on the diversion pipe to be greater than 0, and increase the power of the fourth power component to introduce fluid into the manifold through the diversion pipe, and pressurize the flue gas in the manifold, i.e. the fluid drawn out, into the furnace through the blow pipe.

[0047] S203. Adjust the opening of the control valve on the drainage tube to 0.

[0048] The drying oven provided by this invention has at least the following beneficial effects:

[0049] A cooling regulating valve is installed on the first cooling pipeline. The cooling regulating valve can adjust the flow area of ​​the first cooling pipeline. In case of abnormal production process, the cooling regulating valve can be adjusted to connect the first cooling pipeline with the inside of the furnace body and start the first power unit. The first power unit inputs cold air into the furnace body through the first cooling pipeline to rapidly reduce the temperature inside the furnace body, avoid the problem of product overheating, ensure product quality, and eliminate the need to move the heat source installed on the furnace body. This prevents the sensors and other components installed on the furnace body from being damaged by high temperature, ensures the stable operation of the drying oven, and reduces the operating cost of the drying oven. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of the drying oven provided in an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the first cooling pipeline and the cooling regulating valve, i.e., the first power component, provided in an embodiment of the present invention.

[0053] Figure 3 This is the present invention. Figure 1 The enlarged view at point A is shown below;

[0054] Figure 4 This is a first cross-sectional view of the drying oven provided in an embodiment of the present invention;

[0055] Figure 5 This is the present invention. Figure 4 The enlarged view at point B is shown below;

[0056] Figure 6 This is the present invention. Figure 4 The enlarged view at point C is shown below;

[0057] Figure 7 This is a first front view of the drying oven provided in an embodiment of the present invention;

[0058] Figure 8 This is a first top view of the drying oven provided in an embodiment of the present invention;

[0059] Figure 9 This is a second top view of the drying oven provided in an embodiment of the present invention;

[0060] Figure 10 This is the present invention. Figure 9The DD section view shown;

[0061] Figure 11 This is a second front view of the drying oven provided in an embodiment of the present invention;

[0062] Figure 12 This is a partial schematic diagram of the flue gas emission system provided in an embodiment of the present invention;

[0063] Figure 13 This is a top view of a portion of the flue gas emission system provided in an embodiment of the present invention;

[0064] Figure 14 This is a side view of a partial flue gas emission system provided in an embodiment of the present invention;

[0065] Figure 15 This is the present invention. Figure 14 The enlarged view at point E is shown below;

[0066] Figure 16 This is a side view of the drying oven provided in an embodiment of the present invention;

[0067] Figure 17 This is a schematic diagram of the flue gas recirculation system provided in an embodiment of the present invention;

[0068] Figure 18 This is a schematic diagram of the structure of the blowing pipe provided in an embodiment of the present invention;

[0069] Figure 19 This is the present invention. Figure 18 The FF section view shown;

[0070] Figure 20 This is a side view of the flue gas recirculation system provided in an embodiment of the present invention;

[0071] Figure 21 This is a top view of the flue gas recirculation system provided in an embodiment of the present invention.

[0072] In the picture:

[0073] 100. Furnace body; 110. First cooling interface;

[0074] 210. First cooling pipeline; 220. Cooling regulating valve; 230. First power component;

[0075] 300. Rapid cooling component; 310. Second power component; 311. Disturbance structure; 312. Power unit; 320. Second cooling pipeline; 321. Diffuser hole;

[0076] 400. Burner assembly; 500. Lifting mechanism;

[0077] 600. Flue gas emission system; 610. Main exhaust pipe; 611. First main pipe section; 612. Second main pipe section; 613. Third main pipe section; 620. Branch exhaust pipe assembly; 621. First exhaust branch pipe; 6211. First branch pipe section; 6212. Second branch pipe section; 622. Second exhaust branch pipe; 6221. Connecting pipe section; 6222. Ejector pipe section; 630. Third power component; 640. Exhaust gas regulating valve; 650. Support component;

[0078] 700. Flue gas recirculation system; 710. Manifold; 720. Suction pipe; 721. Suction hole; 722. Second inclined sidewall; 723. Third end; 724. Fourth end; 730. Blowing pipe; 731. First inclined sidewall; 732. Outlet hole; 733. First end; 734. Second end; 740. Fourth power component; 750. Drainage pipe; 760. Drainage regulating valve; 770. First connecting pipe; 780. Second connecting pipe; 781. First pipe section; 782. Second pipe section; 790. Bearing component;

[0079] 800. Rotating mechanism; 900. Chimney;

[0080] 10. Products;

[0081] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0082] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0083] 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.

[0084] In the description of this invention, 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 invention based on the specific circumstances.

[0085] In this invention, 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 being 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 being 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.

[0086] 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0087] 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.

[0088] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0089] Firstly, this embodiment provides a drying oven that can rapidly cool the oven body by introducing air into the oven body without needing to rotate the burner, thus ensuring the stability of the drying oven's operation and reducing operating costs.

[0090] like Figures 1 to 6 As shown, the drying oven includes an oven body 100, a first cooling pipe 210, a cooling regulating valve 220, and a first power component 230. Exemplarily, the oven body 100 in this embodiment can be rectangular. For ease of explanation, the length direction of the oven body 100 is referred to as the first direction X, the width direction as the second direction Y, and the height direction as the third direction Z. The product 10 can be conveyed into the oven body 100 for processing in a contactless manner. For example, one end of the oven body 100 along its length has an inlet, and the other end has an outlet.

[0091] like Figure 1As shown, the furnace body 100 is provided with a first cooling interface 110, which is located on the top wall of the furnace body 100. One end of the first cooling pipe 210 is connected to the first cooling interface 110 and communicates with the interior of the furnace body 100 through the first cooling interface 110. A cooling regulating valve 220 is provided in the first cooling pipe 210 and is used to adjust the flow area of ​​the first cooling pipe 210. When the flow area of ​​the first cooling pipe 210 is 0, the cooling regulating valve 220 can control the first cooling pipe 210 to not communicate with the interior of the furnace body 100. The other end of the first cooling pipe 210 is connected to and communicates with a first power component 230. The first power component 230 is used to input fluid into the furnace body 100 through the first cooling pipe 210.

[0092] For example, the fluid can be air outside the furnace body 100, and it is air at room temperature, so that the air input into the furnace body 100 through the first cooling pipe 210 is cold air relative to the internal environment of the furnace body 100, so as to reduce the temperature inside the furnace body 100.

[0093] It should be noted that the first power component 230 includes, but is not limited to, a fan, etc., and this embodiment does not limit it. The first power component 230 has an outlet, which is connected to and communicates with the first cooling pipe 210. Exemplarily, the first power component 230 is a frequency converter, that is, the first power component 230 has a frequency conversion function, so that the power of the first power component 230 can be adjusted according to the cooling needs within the furnace body 100. The cooling regulating valve 220 in this embodiment can be a flow regulating valve in the prior art. Exemplarily, the cooling regulating valve 220 has the function of automatic or manual adjustment of the opening degree, so as to cooperate with the first power component 230 to ensure rapid cooling.

[0094] The drying oven provided in this embodiment is equipped with a cooling regulating valve 220 on the first cooling pipe 210. The cooling regulating valve 220 can adjust the flow area of ​​the first cooling pipe 210. In case of abnormal production process, the cooling regulating valve 220 can be adjusted to connect the first cooling pipe 210 with the inside of the oven body 100 and start the first power unit 230. The first power unit 230 inputs cold air into the oven body 100 through the first cooling pipe 210 to rapidly reduce the temperature inside the oven body 100, avoid the problem of overheating of the product 10, ensure the quality of the product 10, and eliminate the need to move the heat source installed on the oven body 100. This prevents the sensors and other components installed on the oven body 100 from being damaged by high temperature, ensures the stable operation of the drying oven, and reduces the operating cost of the drying oven.

[0095] One or more first cooling pipes 210 may be provided, and this embodiment does not limit this. When there is one first cooling pipe 210, the first cooling interface 110 may be located in the middle of the furnace body 100 along its length to improve cooling efficiency and cooling effect. Of course, it can be understood that the first cooling interface 110 may also be located near the side of the furnace body 100 away from the flue gas outlet, and this embodiment does not limit this.

[0096] To improve the uniformity of cooling at various locations within the furnace body 100, such as Figure 2 As shown, multiple first cooling pipes 210 are provided. Correspondingly, each first cooling pipe 210 corresponds to a first cooling interface 110 on the furnace body 100, that is, as shown... Figure 8 As shown, multiple first cooling interfaces 110 are provided, and multiple first cooling pipes 210 are connected one-to-one to the multiple first cooling interfaces 110. Multiple cooling regulating valves 220 are also provided, and each first cooling pipe 210 is provided with a cooling regulating valve 220. The multiple first cooling interfaces 110 can be arranged in an array along the length and width directions of the furnace body 100 to improve the cooling speed inside the furnace body 100. In this embodiment, two first cooling interfaces 110 are provided at the top of the furnace body 100, and the two first cooling interfaces 110 are located in the middle of the furnace body 100 in the first direction X, and are spaced apart in the second direction Y. Exemplarily, two first cooling interfaces 110 can also be provided at the bottom of the furnace body 100, but this embodiment does not limit this.

[0097] For example, when multiple first cooling pipes 210 are provided, the multiple first cooling pipes 210 are connected to the same first power unit 230, that is, there is only one first power unit 230. This can improve the utilization rate of the first power unit 230 and reduce the cost of the drying oven. For example, the multiple first cooling pipes 210 can be connected to a mixing pipe through a tee connector or a multi-way connector, and the mixing pipe is connected and communicates with the outlet of the first power unit 230.

[0098] In some alternative embodiments, such as Figure 1 As shown, the drying oven also includes a rapid cooling component 300. (As indicated...) Figure 3 As shown, the rapid cooling assembly 300 includes a second power component 310 and a second cooling pipe 320. The second power component 310 is installed on the top or bottom wall of the furnace body 100. Furthermore, as... Figure 4 and Figure 6As shown, the second power component 310 has a disturbance structure 311 located within the furnace body 100. A second cooling pipe 320 is installed through the top or bottom wall of the furnace body 100, and the second cooling pipe 320 and the second power component 310 are located on the same top or bottom wall of the furnace body 100. One end of the second cooling pipe 320 is located outside the furnace body 100 and communicates with the outside; the other end of the second cooling pipe 320 is located inside the furnace body 100 and is used to selectively input fluid into the furnace body 100. That is, the second cooling pipe 320 has a conducting state and a non-conducting state. When the second cooling pipe 320 is in the conducting state, air outside the furnace body 100 can enter the furnace body 100 through the second cooling pipe 320; when the second cooling pipe 320 is in the non-conducting state, air outside the furnace body 100 cannot enter the furnace body 100 through the second cooling pipe 320. The disturbance structure 311 is used to disturb the fluid (i.e., air) entering the furnace body 100 through the second cooling pipe 320, so that the cold air entering the furnace body 100 through the second cooling pipe 320 can diffuse rapidly. In this embodiment, a flow regulating valve can be installed on the second cooling pipe 320 to adjust the flow area of ​​the second cooling pipe 320, thereby realizing the switching between the conducting state and the non-conducting state of the second cooling pipe 320.

[0099] By setting up the rapid cooling component 300, when the inside of the drying oven needs a small degree of cooling, air is introduced into the oven body 100 through the second cooling pipe 320. Since no power unit is installed on the second cooling pipe 320, the amount of air introduced into the oven body 100 through the second cooling pipe 320 will be small, usually less than the amount of air introduced into the oven body 100 through the first cooling pipe 210. Therefore, the rapid cooling component 300 is suitable for small-gradient cooling, while the first cooling pipe 210, the cooling regulating valve 220 and the first power component 230 are suitable for large-gradient cooling.

[0100] Optionally, such as Figure 6 As shown, the second power component 310 includes a power body 312 and the aforementioned disturbance structure 311. The power body 312 is installed on the side wall of the furnace body 100, and the disturbance structure 311 is connected to the output end of the power body 312. The power body 312 drives the disturbance structure 311 to rotate, thereby disturbing the gas inside the furnace body 100. The disturbance structure 311 includes, but is not limited to, blades.

[0101] In this embodiment, as Figure 6As shown, the second cooling pipe 320 is closer to the inner wall of the furnace body 100 than the disturbance structure 311 to ensure the disturbance effect of the disturbance structure 311. The outer peripheral wall of the end of the second cooling pipe 320 located inside the furnace body 100 is provided with multiple diffusion holes 321. Air diffuses into the furnace body 100 through the multiple diffusion holes 321 so that it can flow into the furnace body 100 more evenly and will not blow directly onto the surface of the product 10, thus avoiding the product 10 surface from being affected by drastic temperature changes and thus its quality.

[0102] In one embodiment, the drying oven further includes a fifth power unit (not shown in the figure), which is connected to and communicates with the second cooling pipe 320 via a pipeline and is used to supply air to the second cooling pipe 320. Since the pressure inside the furnace body 100 is usually high, supplying air with a certain pressure to the second cooling pipe 320 via the fifth power unit can ensure that air enters the furnace body 100 through the second cooling pipe 320.

[0103] To ensure uniformity during small-gradient cooling within the furnace body 100, in some optional embodiments, such as Figure 4 As shown, multiple rapid cooling components 300 are provided at the top and bottom of the furnace body 100, and these components are spaced apart along the length of the furnace body 100 (i.e., the first direction X). This allows each area inside the furnace body 100 in the first direction X to achieve a small-scale temperature reduction, improving the cooling effect and uniformity.

[0104] Furthermore, the rapid cooling components 300 at the top and bottom of the furnace body 100 are located in the middle of the furnace body 100 in the second direction Y, so as to improve the effect of easy diffusion in the width direction of the furnace body 100.

[0105] To ensure the heating effect of product 10 inside furnace body 100, such as Figure 1 As shown, the drying oven also includes burner assemblies 400, with multiple burner assemblies 400 provided at the top and bottom of the oven body 100 to heat both surfaces of the product 10.

[0106] Exemplarily, the burner assembly 400 in this embodiment includes at least one porous media burner. Porous media combustion technology is a combustion method in which a mixture of fuel gas and air is burned in the pores of a porous medium. Porous media combustion has three heat transfer modes: convection, conduction, and radiation, resulting in a uniform temperature in the combustion zone and a stable temperature gradient. It also exhibits high volumetric heat intensity while maintaining stable combustion. Compared to free combustion, porous media combustion offers advantages such as high combustion rate, good combustion stability, wide load adjustment range, high volumetric heat intensity, small burner size, good fuel gas adaptability, low pollutant emissions in flue gas, wider combustion limits, and the ability to burn fuels with very low calorific value. Multiple porous media burners in each burner assembly 400 are arranged adjacent to each other along the second direction Y.

[0107] To increase production capacity, the product 10 moves at a certain speed within the furnace body 100 during the heating process. Therefore, to ensure that the product 10 is heated evenly within the furnace body 100, multiple burner assemblies 400 located at the top of the furnace body 100 are spaced apart along the first direction X, and multiple burner assemblies 400 located at the bottom of the furnace body 100 are also spaced apart along the first direction X.

[0108] In this embodiment, when the top and bottom of the furnace body 100 both have multiple burner assemblies 400 and multiple rapid cooling assemblies 300, in this embodiment, as... Figure 1 and Figure 4 As shown, the rapid cooling assembly 300 and burner assembly 400 at the top of the furnace body 100 are alternately arranged along the length of the furnace body 100, and the rapid cooling assembly 300 and burner assembly 400 at the bottom of the furnace body 100 are also alternately arranged along the length of the furnace body 100. This arrangement fully utilizes the space on the furnace body 100 and also ensures that the cold air entering the furnace body 100 through the second cooling pipe 320 can slow down or prevent the heat generated by the burner assembly 400 from reaching the surface of the product 10, thus guaranteeing a rapid cooling effect.

[0109] In some optional embodiments, the burner assembly 400 is rotatably connected to the furnace body 100, and the drying oven also includes a lifting mechanism 500, with each burner assembly 400 connected to at least one lifting mechanism 500. The lifting mechanism 500 is used to drive the connected burner assembly 400 to rotate relative to the furnace body 100, so as to realize the flipping of the burner assembly 400 relative to the furnace body 100, so as to facilitate the maintenance and repair of the burner assembly 400.

[0110] Exemplarily, the burner assembly 400 is rotatably connected to the furnace body 100 via a rotating mechanism 800. Specifically, both the lifting mechanism 500 and the rotating mechanism 800 are located outside the furnace body 100 and are used to cooperate in lifting the burner assembly 400. For example, the lifting mechanism 500 includes a cylinder, the output end of which is rotatably connected to the middle of one side of the burner assembly 400 in the width direction, and one end of the burner assembly 400 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 burner assembly 400 to rotate relative to the furnace body 100, thereby realizing the conversion between a closed state and a lifted state. When the burner assembly 400 is in the closed state, as... Figure 1 As shown, the combustion surface of the burner assembly 400 faces the product 10 inside the furnace body 100; when the burner assembly 400 is in the raised state, as... Figure 7 As shown, the burner assembly 400 is located outside the furnace body 100 and is either vertical or inclined to facilitate inspection and maintenance.

[0111] When the product 10 is heated using a porous media burner, the high-temperature flue gas generated by the porous media burner is released into the furnace body 100. Therefore, if... Figure 1 As shown, the drying oven is equipped with a flue gas emission system 600.

[0112] For example, such as Figure 8 As shown, the flue gas emission system 600 includes a main exhaust pipe 610, a branch exhaust pipe assembly 620, and a third power component 630.

[0113] like Figures 9 to 15 As shown, the inlet of the branch flue pipe assembly 620 is connected to the furnace body 100, so that the flue gas in the furnace body 100 can flow to the branch flue pipe assembly 620. The outlet of the branch flue pipe assembly 620 is connected to the main flue pipe 610, so that the flue gas in the branch flue pipe assembly 620 can flow to the main flue pipe 610 and then be discharged through the main flue pipe 610.

[0114] For example, the inlet of the third power component 630 is connected to the main exhaust pipe 610, and the third power component 630 is used to draw the flue gas in the main exhaust pipe 610, and then indirectly draw the flue gas in the furnace body 100 through the main exhaust pipe 610 and the branch exhaust pipe assembly 620, and to transport the flue gas to the chimney 900 to realize the exhaust of the furnace body 100.

[0115] In some optional embodiments, the connection point between the branch exhaust pipe assembly 620 and the main exhaust pipe 610 is spaced apart from the connection point between the third power component 630 and the main exhaust pipe 610. That is, the axis of the exhaust outlet of the branch exhaust pipe assembly 620 is different from the axis of the connection point between the main exhaust pipe 610 and the third power component 630. This ensures that the flue gas in the branch exhaust pipe assembly 620 is not directly drawn to the third power component 630, but instead first enters the main exhaust pipe 610, undergoes directional adjustment by the main exhaust pipe 610, and then flows to the third power component 630. For example, the third power component 630 can be a fan, a blower, or other power equipment; this embodiment does not limit this.

[0116] The flue gas emission system 600 provided in this embodiment has a branch flue pipe assembly 620 connected to the furnace body 100 of the drying oven, a main flue pipe 610 connected to the furnace body 100 via the branch flue pipe assembly 620, and a third power component 630 connected to the main flue pipe 610. The main flue pipe 610 and the branch flue pipe assembly 620 indirectly draw flue gas from the furnace body 100, so that the flow field of the flue gas in the furnace body 100 does not change drastically, but changes slowly. This reduces the disturbance of the flue gas to the temperature distribution in the furnace body 100, avoids the instability of the flue gas in the furnace body 100, and makes the temperature in various positions in the furnace body 100 more uniform. This facilitates the control of the temperature distribution in the furnace body 100 and improves the heating effect on the product 10.

[0117] In some alternative embodiments, such as Figure 12 As shown, the branch flue assembly 620 includes a first flue branch pipe 621 and a second flue branch pipe 622. The inlet of the first flue branch pipe 621 is connected to the furnace body 100, and the outlet of the first flue branch pipe 621 and the inlet of the second flue branch pipe 622 are spaced apart. That is, this embodiment uses an ejector method to achieve flue gas exhaust from the furnace body 100. While ensuring smooth extraction of flue gas from the furnace body 100, it can further reduce the disturbance to the temperature inside the furnace body 100, resulting in a better flue gas exhaust effect.

[0118] Specifically, in this embodiment, the third power component 630 can be a fixed-frequency fan, meaning that the exhaust volume of the third power component 630 is constant. The main source of flue gas discharged by the flue gas emission system 600 is burner combustion. When the burner power is reduced, the amount of flue gas produced decreases. When the fan exhaust volume is constant, in addition to flue gas, external cold air will be drawn into the furnace body 100 through the gaps in the furnace body 100, which will have a significant impact on the temperature stability inside the furnace body 100.

[0119] In this embodiment, the exhaust port of the first exhaust branch pipe 621 and the inlet of the second exhaust branch pipe 622 are spaced apart. That is, the exhaust port of the first exhaust branch pipe 621 and the second exhaust branch pipe 622 are not directly connected. When the burner power in the furnace body 100 decreases and the amount of flue gas produced decreases, outside air can be introduced through the gap between the first exhaust branch pipe 621 and the second exhaust branch pipe 622, without having to draw in cold air into the furnace body 100 through the gaps in the furnace body 100. When the exhaust volume of the third power component 630 remains unchanged, the total exhaust volume of the flue gas emission system 600 = the amount of flue gas produced in the furnace body 100 + the amount of air introduced through the gap between the first exhaust branch pipe 621 and the second exhaust branch pipe 622. Both change with the amount of flue gas, but the total exhaust volume remains unchanged.

[0120] The flue gas emission system 600 provided in this embodiment has a first exhaust branch pipe 621 of the branch exhaust pipe assembly 620 connected to the furnace body 100 of the drying oven, and a second exhaust branch pipe 622 connected to the main exhaust pipe 610. When the amount of flue gas in the furnace body 100 decreases, the third power component 630 can introduce outside air through the gap between the first exhaust branch pipe 621 and the second exhaust branch pipe 622. The introduced air fills the reduced amount of flue gas without having to draw in cold air into the furnace body 100 through the gaps in the furnace body 100. This reduces the disturbance of the flue gas to the temperature distribution in the furnace body 100, avoids flue gas instability in the furnace body 100, and makes the temperature in various positions in the furnace body 100 more uniform. This facilitates the control of the temperature distribution in the furnace body 100 and improves the heating effect on the product 10.

[0121] For example, the outlet area of ​​the first exhaust branch pipe 621 is smaller than the inlet area of ​​the second exhaust branch pipe 622. This ensures the injection effect while allowing the inlet of the second exhaust branch pipe 622 to draw as much flue gas as possible from the outlet of the first exhaust branch pipe 621 into the second exhaust branch pipe 622, preventing gas leakage and ensuring the environment of the space where the furnace body 100 is located. The outlet of the second exhaust branch pipe 622 is connected to the main exhaust pipe 610 to facilitate the flow of flue gas from the second exhaust branch pipe 622 to the main exhaust pipe 610.

[0122] Optionally, such as Figure 15As shown, the interval H between the smoke outlet of the first exhaust branch pipe 621 and the smoke inlet of the second exhaust branch pipe 622 ranges from 10mm to 100mm. If the interval H is too large, the smoke from the outlet of the first exhaust branch pipe 621 will leak out, affecting the smoke extraction effect and increasing the load on the third power component 630. If the interval H is too small, it will be close to a direct connection between the first and second exhaust branch pipes 621 and 622, failing to achieve the desired ejection effect. For example, the interval H values ​​between the outlet of the first exhaust branch pipe 621 and the smoke inlet of the second exhaust branch pipe 622 are 10mm, 20mm, 50mm, 70mm, 80mm, 90mm, and 100mm.

[0123] For example, both the first exhaust branch pipe 621 and the second exhaust branch pipe 622 are circular pipes to provide a larger flow area. Wherein, as Figure 5 As shown, the diameter of the smoke outlet of the first exhaust branch pipe 621 is D, and the diameter of the smoke inlet of the second exhaust branch pipe 622 is D2, where D1 < D2, and the difference between D1 and D2 ranges from 100mm to 200mm. A significant difference between the diameter of the smoke outlet of the first exhaust branch pipe 621 and the diameter of the smoke inlet of the second exhaust branch pipe 622 will cause the second exhaust branch pipe 622 to draw in a large amount of air through its smoke inlet, thus increasing the load requirement of the third power component 630. Prolonged high-load operation of the third power component 630 will shorten its service life and increase unnecessary energy consumption, thereby increasing the cost of the flue gas emission system 600. Conversely, a smaller difference between the diameter of the smoke outlet of the first exhaust branch pipe 621 and the diameter of the smoke inlet of the second exhaust branch pipe 622 may lead to flue gas leakage. For example, the difference between D1 and D2 could be 100mm, 120mm, 150mm, 180mm, or 200mm.

[0124] It is understandable that the first exhaust branch pipe 621 and the second exhaust branch pipe 622 can also be polygonal pipes. In this case, the diameter of the smoke outlet of the first exhaust branch pipe 621 specifically refers to the equivalent diameter of the smoke outlet of the first exhaust branch pipe 621, and the diameter of the smoke inlet of the second exhaust branch pipe 622 specifically refers to the equivalent diameter of the smoke inlet of the second exhaust branch pipe 622.

[0125] In some alternative embodiments, please refer to Figure 14The second exhaust branch pipe 622 includes a connecting pipe section 6221 and an ejector pipe section 6222. One end of the connecting pipe section 6221 is connected to and communicates with the main exhaust pipe 610, and the ejector pipe section 6222 is connected to the other end of the connecting pipe section 6221. That is, the inner diameter of the ejector pipe section 6222 near the connecting pipe section 6221 is equal to the inner diameter of the connecting pipe section 6221. The area of ​​the port of the ejector pipe section 6222 away from the connecting pipe section 6221 is larger than the area of ​​the exhaust outlet of the first exhaust branch pipe 621.

[0126] In this embodiment, the connecting pipe section 6221 has a constant diameter structure, while the ejector pipe section 6222 has a variable diameter structure. For example, the ejector pipe section 6222 is a frustum-shaped pipe, and the flow area of ​​the ejector pipe section 6222 connected to one end of the connecting pipe section 6221 is smaller than the area of ​​the ejector pipe section 6222 away from the end of the connecting pipe section 6221. By setting the ejector pipe section 6222 to a frustum shape, the inner diameter of the ejector pipe section 6222 gradually changes along its axial direction, with a smaller flow area near the connecting pipe section 6221 and a larger flow area near the smoke outlet end of the first exhaust branch pipe 621. The flue gas flows out from the outlet of the first exhaust branch pipe 621 and enters the ejector pipe section 6222. Due to the reduction in the flow area, the flow velocity of the flue gas in the ejector pipe section 6222 increases, so that the flue gas around the ejector pipe section 6222 can be drawn into the ejector pipe section 6222, thereby improving the exhaust effect and exhaust efficiency.

[0127] Optionally, in this embodiment, the axis of the ejector tube section 6222 coincides with the axis of the first exhaust branch pipe 621, so that the ejector tube section 6222 can be directly aligned with the first exhaust branch pipe 621. The flue gas discharged from the first exhaust branch pipe 621 enters the ejector tube section 6222 under the action of inertial force, further improving the exhaust effect of the flue gas emission system 600.

[0128] In some alternative embodiments, such as Figure 14 As shown, the connecting pipe section 6221 is bent, meaning that the flue gas changes direction when flowing through it. This effectively increases the internal resistance of the flue gas flow, ensuring smooth smoke extraction without excessive suction at the inlet of the connecting pipe section 6221, thus further reducing temperature disturbance within the furnace body 100. In this embodiment, the bending angle of the connecting pipe section 6221 is greater than 90° to avoid excessive resistance that could compromise the smoke extraction effect.

[0129] Optionally, such as Figure 11As shown, the flue gas emission system 600 includes multiple sets of branch flue pipe assemblies 620. The multiple sets of branch flue pipe assemblies 620 are arranged at intervals along the extension direction of the main flue pipe 610 to exhaust flue gas from different areas within the furnace body 100. This ensures that the suction force at the inlet of each branch flue pipe assembly 620 does not need to be too large to draw in the flue gas located near the inlet of the branch flue pipe assembly within the furnace body 100, thereby preventing excessive disturbance to the temperature within the furnace body 100.

[0130] For example, such as Figure 14 As shown, each set of branch flue pipe assemblies 620 includes two branch flue pipe assemblies 620. The two branch flue pipe assemblies 620 in each set are symmetrically arranged on both sides of the main flue pipe 610 to further improve the flue gas exhaust effect and uniformity, and to minimize the disturbance to the temperature inside the furnace body 100.

[0131] In some alternative embodiments, such as Figure 14 As shown, the flue gas emission system 600 also includes a flue gas regulating valve 640, which is installed in the first flue gas branch pipe 621 and used to regulate the flow area of ​​the first flue gas branch pipe 621. By setting the flue gas regulating valve 640, when flue gas is needed, the opening of the flue gas regulating valve 640 is adjusted to be non-zero, allowing the flue gas in the furnace body 100 to flow out through the first flue gas branch pipe 621. When flue gas is not needed, the opening of the flue gas regulating valve 640 is adjusted to zero, preventing the flue gas from flowing out of the first flue gas branch pipe 621, and preventing external air from flowing into the furnace body 100 through the first flue gas branch pipe 621, making the extraction power of the flue gas emission system 600 adjustable.

[0132] For example, such as Figure 14 As shown, the first exhaust branch pipe 621 includes a first branch pipe section 6211 and a second branch pipe section 6212 connected together. The first branch pipe section 6211 is connected and communicates with the furnace body 100, and the second branch pipe section 6212 is arranged towards the ejector pipe section 6222. The exhaust regulating valve 640 is arranged between the first branch pipe section 6211 and the second branch pipe section 6212.

[0133] In some alternative embodiments, such as Figure 9 As shown, the main exhaust pipe 610 may include a first main pipe section 611, a second main pipe section 612, and a third main pipe section 613. The first main pipe section 611 extends along the length of the furnace body 100 and is positioned above the top of the furnace body 100. The second main pipe section 612 is perpendicular to the first main pipe section 611 and extends along the width of the furnace body 100. Figure 9 In the process, the conveying direction of product 10 is from right to left, that is, the material conveying outlet of the furnace body 100 is located at... Figure 9The left side of the state shown. The second main pipe section 612 is located at one end of the first main pipe section 611 near the material transport outlet of the furnace body 100. The third main pipe section 613 is arranged perpendicular to the second main pipe section 612 and extends along the length of the furnace body 100. The third power unit 630 is located at one end of the third main pipe section 613 away from the second main pipe section 612.

[0134] In this embodiment, as Figure 12 As shown, the main exhaust pipe 610 is fixed to the furnace body 100 by a support member 650. For example, there are two support members 650. One end of the two support members 650 is connected to the two ends of the main exhaust pipe 610, and the other end of the support member 650 extends toward both ends of the furnace body 100 in the length direction and is connected to the furnace body 100.

[0135] For example, such as Figure 11 As shown, at least a portion of the flue gas emission system 600 is located at the top of the furnace body 100, that is, the flue gas outlet of the furnace body 100 is located at the top. The main exhaust pipe 610 extends along the length of the furnace body 100, for example, the main exhaust pipe 610 extends from one end of the furnace body 100 to the other end in the first direction X.

[0136] For example, such as Figure 8 and Figure 9 As shown, the flue gas emission system 600 includes multiple sets of branch flue pipe assemblies 620. The two branch flue pipe assemblies 620 of each set are positioned near the edge of the furnace body 100 in the width direction at their connection points with the furnace body 100 (i.e., the flue gas outlets of the furnace body 100). Since the product 10 operates continuously within the furnace body 100, it is equivalent to having a flue gas barrier with a width equal to the width of the product 10 along the length of the furnace body 100, causing the flue gas to accumulate towards the two sides in the width direction of the furnace body 100. In this embodiment, several flue gas outlets are provided on the edge of the top of the furnace body 100 in the width direction for flue gas exhaust, and each flue gas outlet is connected to a branch flue pipe assembly 620 to improve the uniformity of flue gas exhaust.

[0137] In some optional embodiments, when the drying oven is equipped with burner assemblies 400, multiple sets of burner assemblies 400 are spaced apart along the length of the oven body 100, and exhaust ports can be provided between two adjacent burner assemblies 400 to ensure exhaust effect.

[0138] Based on the use of a porous media combustion assembly, to avoid the high-temperature flue gas generated by the porous media combustion assembly burning off product 10, in this embodiment, as follows... Figure 1 As shown, the drying oven also includes a flue gas recirculation system 700.

[0139] Among them, such as Figures 16 to 21As shown, the flue gas recirculation system 700 includes a manifold 710, a suction pipe 720, a blow pipe 730, and a fourth power component 740;

[0140] The manifold 710 is installed in the furnace body 100. The manifold 710 can be located outside the furnace body 100, embedded in the furnace body 100, or located inside the furnace body 100. This embodiment does not limit this.

[0141] like Figure 17 As shown, the suction pipe 720 is connected to the manifold 710, allowing the flue gas in the suction pipe 720 to flow into the manifold 710. Furthermore, the suction pipe 720 is provided with multiple suction holes 721. The suction pipe 720 is located inside the furnace body 100, allowing the flue gas inside the furnace body 100 to enter the suction pipe 720 through the multiple suction holes 721.

[0142] In this embodiment, the blowing pipe 730 is connected to the confluence cavity 710, allowing the flue gas in the confluence cavity 710 to flow to the blowing pipe 730. Furthermore, the blowing pipe 730 has a first inclined sidewall 731 with multiple outlet holes 732. The blowing pipe 730 is located inside the furnace body 100, allowing the flue gas in the blowing pipe 730 to be blown into the furnace body 100. The suction pipe 720 and the blowing pipe 730 are spaced apart, so that the suction pipe 720, the blowing pipe 730, and the confluence cavity 710 cooperate to form a flue gas circulation path.

[0143] In this embodiment, the fourth power component 740 is configured to draw flue gas from the suction pipe 720 to the manifold 710 and to pressurize the flue gas in the manifold 710 to the blow pipe 730, thereby providing power for the flow of flue gas in the circulation path. Exemplarily, the fourth power component 740 can be a fan, a blower, or other power equipment, and this embodiment does not limit this.

[0144] The flue gas circulation system 700 provided in this embodiment includes a suction pipe 720 and a blower pipe 730 inside the furnace body 100. A fourth power component 740 generates negative pressure within the suction pipe 720, allowing the high-temperature flue gas inside the furnace body 100 to enter the suction pipe 720 through the suction hole 721 under the suction of the fourth power component 740, and flow to the confluence chamber 710. The flue gas in the confluence chamber 710 then enters the blower pipe 730 under the action of the fourth power component 740, and is blown out through the outlet hole 732 into the furnace body 100 under the high-pressure drive of the fourth power component 740, thus realizing flue gas circulation. The temperature of the hot flue gas decreases as it flows from the suction pipe 720 to the manifold 710 and then from the manifold 710 to the blowing pipe 730. This prevents the hot flue gas from being directly blown onto the product 10, even if the distance between the product 10 and the heat source inside the furnace 100 is small. Even if the hot flue gas comes into contact with the product 10, it passes through the product 10 quickly under the suction of the fourth power component 740, resulting in a very short contact time between the hot flue gas and the product 10. This avoids burning the product 10 with the hot flue gas, ensures the quality of the product 10, and improves the reliability of the drying oven.

[0145] For example, when the drying oven includes a burner assembly 400, a first inclined sidewall 731 is disposed on the side of the blowpipe 730 near the adjacent burner assembly 400 and facing the product 10 inside the oven body 100. It should be noted that when there is one burner assembly 400 inside the oven body 100, the first inclined sidewall 731 is disposed on the side of the blowpipe 730 near that single burner assembly 400. When there are multiple burner assemblies 400 inside the oven body 100, such as... Figure 1 As shown, there are multiple flue gas recirculation systems 700, and each flue gas recirculation system 700 corresponds to a multiple burner assembly 400. The first inclined sidewall 731 of the blow pipe 730 of each flue gas recirculation system 700 is located on the side of the blow pipe 730 close to the corresponding burner assembly 400.

[0146] Optionally, such as Figure 18 and Figure 19As shown, the angle b between the plane containing the first inclined sidewall 731 and the horizontal plane ranges from 40° to 50°. If the angle between the plane containing the first inclined sidewall 731 and the horizontal plane is too large, the first inclined sidewall 731 will approach a vertical plane, resulting in a smaller area of ​​the first inclined sidewall 731, which in turn will result in a smaller arrangement area of ​​the outlet holes 732, thus affecting the amount of smoke blown out. Furthermore, the smoke blown out of the outlet holes 732 on the first inclined sidewall 731 will not be directed towards the product 10, affecting the heating efficiency of the product 10. If the angle between the plane containing the first inclined sidewall 731 and the horizontal plane is too small, the first inclined sidewall 731 will approach a horizontal plane, which will also affect the arrangement area of ​​the outlet holes 732, and the smoke blown out of the outlet holes 732 of the first inclined sidewall 731 will directly blow onto the product 10, which may result in the product 10 being burned. For example, the angle b between the plane containing the first inclined sidewall 731 and the horizontal plane is 40°, 42°, 45°, 48°, or 50°. It should be noted that the product 10 is plate-shaped, and the thickness direction of the product 10 is vertical, that is, the top and bottom surfaces of the product 10 are parallel to the horizontal plane.

[0147] In this embodiment, the inclination direction of the first inclined sidewall 731 allows the flue gas blown out from the first inclined sidewall 731 to mix with the high-temperature flue gas released by the burner assembly 400, thereby reducing the temperature of the high-temperature flue gas and further preventing the high-temperature flue gas from directly contacting the product 10, thus further improving reliability.

[0148] In some alternative embodiments, such as Figure 5 As shown, the suction pipe 720 has a second inclined sidewall 722. The second inclined sidewall 722 is located on the side of the suction pipe 720 near the burner assembly 400 and faces the product 10 inside the furnace body 100. In this embodiment, the suction hole 721 is located on the second inclined sidewall 722. By providing the second inclined sidewall 722, the arrangement area of ​​the suction hole 721 can be larger, thereby allowing for the arrangement of more suction holes 721. Furthermore, the second inclined sidewall 722 is located on the side of the suction pipe 720 near the burner assembly 400 and faces the product 10 inside the furnace body 100, so that as much heat released by the burner assembly 400 as possible can be drawn into the suction pipe 720, thereby reducing the probability of high-temperature flue gas directly contacting the product 10.

[0149] For example, the angle between the plane containing the second inclined sidewall 722 and the horizontal plane ranges from 40° to 50°. For instance, the angle between the plane containing the second inclined sidewall 722 and the horizontal plane is 40°, 42°, 45°, 48°, or 50°.

[0150] For example, such as Figure 17 or Figure 21As shown, the blowing pipe 730 has a first end 733 extending in the direction of extension and a second end 734 disposed opposite to the first end 733. The first end 733 is closer to the confluence cavity 710 than the second end 734. In this embodiment, the blowing pipe 730 extends in the second direction Y, and the suction pipe 720 also extends in the second direction Y.

[0151] In some optional embodiments, the flow area of ​​the blowing pipe 730 gradually increases along the direction from the second end 734 to the first end 733; that is, the blowing pipe 730 is a tapering pipe along the direction from the first end 733 to the second end 734. The flow area of ​​the blowing pipe 730 is the longitudinal cross-sectional area of ​​the inner cavity of the blowing pipe 730. This ensures that the pressure at all positions of the blowing pipe 730 along the second direction Y is consistent, thereby ensuring the uniformity of the flue gas blown into the furnace body 100, and thus ensuring the uniformity of the flue gas distribution within the furnace body 100, improving the heating effect on the product 10, and avoiding a situation where the second end 734, which is far from the fourth power component 740, experiences reduced flue gas flow due to insufficient gas pressure. It should be noted that in this embodiment, the orifices 732 have the same diameter.

[0152] In some alternative embodiments, the suction tube 720 has a third end 723 in the extending direction (i.e., the second direction Y) and a fourth end 724 disposed opposite to the third end 723, wherein the third end 723 is closer to the manifold 710 relative to the fourth end 724.

[0153] In this embodiment, the flow area of ​​the suction pipe 720 gradually increases along the direction from the fourth end 724 to the third end 723; that is, the suction pipe 720 is a tapering pipe from the third end 723 to the fourth end 724. The flow area of ​​the suction pipe 720 is the total cross-sectional area of ​​its inner cavity. This ensures that the suction force of the suction pipe 720 is consistent at all positions along the second direction Y, guaranteeing that all high-temperature flue gas near the suction pipe 720 is drawn into it, reducing the probability of high-temperature flue gas leakage and preventing the fourth end 724, which is far from the fourth power component 740, 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 apertures of the multiple suction holes 721 are the same.

[0154] In some alternative embodiments, the flow area of ​​the blowpipe 730 is the same along the direction from the second end 734 to the first end 733, and the flow area of ​​the outlet hole 732 gradually decreases. This ensures that the pressure at all positions of the blowpipe 730 along the second direction Y 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 10, and preventing a reduction in flue gas flow due to insufficient gas pressure at the second end 734, which is farther from the fourth power component 740.

[0155] In some alternative embodiments, the flow area of ​​the suction pipe 720 is the same from the fourth end 724 to the third end 723, and the flow area of ​​the suction hole 721 gradually decreases. This ensures that the suction force of the suction pipe 720 is consistent at all positions along the second direction Y, guaranteeing that all high-temperature flue gas near the suction pipe 720 in the furnace body 100 is drawn into the suction pipe 720, reducing the probability of high-temperature flue gas leakage, and preventing the fourth end 724, which is far from the fourth power component 740, from failing to effectively extract high-temperature flue gas due to insufficient suction force, thus improving the efficiency of flue gas circulation.

[0156] For example, the length of the suction pipe 720 in the second direction Y is greater than the length of the product 10 in the second direction Y, and the orthogonal projection of the suction pipe 720 on the product 10 penetrates the product 10, to prevent high-temperature flue gas from being directly blown onto the product 10. Similarly, the length of the blowing pipe 730 in the second direction Y is greater than the length of the product 10 in the second direction Y, and the orthogonal projection of the blowing pipe 730 on the product 10 penetrates the product 10, so that the flue gas blown out by the blowing pipe 730 can evenly contact various positions of the product 10 in the second direction Y, thereby ensuring the heating effect on the product 10.

[0157] In some optional embodiments, both the suction tube 720 and the blowing tube 730 can be polygonal tubes, or they can be arc-shaped tubes, elliptical tubes, etc. This embodiment does not limit them.

[0158] In this embodiment, as Figure 4As shown, two suction pipes 720 and two blowing pipes 730 are provided in a one-to-one correspondence. The two suction pipes 720 are spaced apart in the third direction Z, and the two blowing pipes 730 are spaced apart in the third direction Z. The corresponding suction pipes 720 and blowing pipes 730 are spaced apart in the first direction X. The conveying direction of product 10 in the furnace body 100 is the length direction of the furnace body 100. By setting two sets of suction pipes 720 and blowing pipes 730, one set of suction pipes 720 and blowing pipes 730 can circulate the high-temperature flue gas released by the burner assembly 400 at the top of the furnace body 100 to avoid burning the top surface of product 10; the other set of suction pipes 720 and blowing pipes 730 can circulate the high-temperature flue gas released by the burner assembly 400 at the bottom of the furnace body 100 to avoid burning the bottom surface of product 10, thereby ensuring that neither the top nor bottom surface of product 10 is burned, further improving the reliability of the drying oven and ensuring the quality of product 10.

[0159] Optionally, one set of suction pipes 720 and blowing pipes 730 is configured to abut against the inner top wall of the furnace body 100, and another set of suction pipes 720 and blowing pipes 730 is configured to abut against the inner bottom wall of the furnace body 100. This ensures that the blowing pipes 730 are not too close to the product 10, thus preventing damage to the product 10. Furthermore, the abutment with the furnace body 100 prevents the suction pipes 720 and blowing pipes 730 from vibrating violently, improving their stability and ensuring that the blowing pipes 730 blow out flue gas in a specific direction. For example, the surfaces of the suction pipes 720 and blowing pipes 730 that abut against the furnace body 100 are both flat, further enhancing the abutment effect.

[0160] For example, such as Figure 17 or Figure 20 As shown, the flue gas recirculation system 700 also includes two support members 790. One end of the support member 790 is connected to the second end 734 of the blow pipe 730 near the top of the furnace body 100, and the other end is connected to the furnace body 100, so as to fix the blow pipe 730 more firmly to the furnace body 100 and further improve the stability of the blow pipe 730.

[0161] In this embodiment, as Figure 21 As shown, the suction pipe 720 has a third end 723 extending in the direction of extension and a fourth end 724 disposed opposite to the third end 723, with the third end 723 closer to the manifold 710 relative to the fourth end 724. One end of the other of the two support members 790 is connected to the fourth end 724 of the suction pipe 720 near the top of the furnace body 100, and the other end is connected to the furnace body 100, so as to more firmly fix the suction pipe 720 to the furnace body 100 and further improve the stability of the suction pipe 720.

[0162] Optionally, the load-bearing member 790 can be a hanger or other rod-like structure.

[0163] For example, such as Figure 17 As shown, the flue gas recirculation system 700 also includes a first connecting pipe 770. The first connecting pipe 770 connects the manifold 710 and the suction pipe 720, and the suction pipe 720 and the first connecting pipe 770 are detachably connected. By providing the first connecting pipe 770, communication between the manifold 710 and the suction pipe 720 can be achieved; furthermore, it facilitates the disassembly, cleaning, or replacement of the suction pipe 720. For example, the manifold 710 can be located outside the furnace body 100, the first connecting pipe 770 can pass through the furnace body 100, and the connection point between the suction pipe 720 and the first connecting pipe 770 can be located inside the furnace body 100, facilitating the disassembly of the first connecting pipe 770 and the suction pipe 720. Of course, it is understood that the first connecting pipe 770 can also be located outside the furnace body 100, with the suction pipe 720 passing through the furnace body 100 and connecting to the first connecting pipe 770, which also facilitates the disassembly of the suction pipe 720. Since the suction pipe 720 is used to draw smoke through the suction hole 721, the suction hole 721 may become clogged after long-term use, affecting the uniformity of smoke extraction. Therefore, by setting the suction pipe 720 to be easy to disassemble, maintenance efficiency can be improved.

[0164] Optionally, please continue to see Figure 17 The flue gas recirculation system 700 also includes a second connecting pipe 780. The second connecting pipe 780 connects the manifold 710 and the blowpipe 730, and the blowpipe 730 and the second connecting pipe 780 are detachably connected. By providing the second connecting pipe 780, communication between the manifold 710 and the blowpipe 730 can be achieved; furthermore, it facilitates the disassembly, cleaning, or replacement of the blowpipe 730. For example, the manifold 710 can be located outside the furnace body 100, and the second connecting pipe 780 can pass through the furnace body 100. The connection point between the blowpipe 730 and the second connecting pipe 780 can be located inside the furnace body 100 to facilitate the disassembly of the second connecting pipe 780 and the blowpipe 730. Alternatively, the second connecting pipe 780 can also be located outside the furnace body 100, with the blowpipe 730 passing through the furnace body 100 and connecting to the second connecting pipe 780, which also facilitates the disassembly of the blowpipe 730. Since the flue pipe is used to blow smoke through the outlet hole 732, the outlet hole 732 may become blocked after long-term use, affecting the uniformity of smoke blowing. Therefore, by setting the blow pipe 730 which is easy to disassemble, maintenance efficiency can be improved.

[0165] Optionally, the flow area of ​​the second connecting pipe 780 is larger than that of the blowing pipe 730, so that when the flue gas flows from the second connecting pipe 780 to the blowing pipe 730, 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 10 and ensure the heating effect.

[0166] In some optional embodiments, the second connecting pipe 780 is L-shaped and includes a first pipe segment 781 and a second pipe segment 782. One end of the first pipe segment 781 is connected to the manifold 710, and the end of the second pipe segment 782 opposite to the first pipe segment 781 is connected to the blow pipe 730. This ensures that the blow pipe 730 and the suction pipe 720 are located on opposite sides of the burner assembly 400 in the first direction X. The first connecting pipe 770 is straight, so that the manifold 710 and the fourth power member 740 are close to the suction pipe 720, thereby allowing the suction pipe 720 to have a large suction force to ensure that as much high-temperature flue gas as possible is drawn in.

[0167] For example, such as Figure 16 and Figure 20 As shown, the second pipe segment 782 is located outside the furnace body 100 and extends along the second direction Y. The second pipe segment 782 is configured to provide installation space for the lifting mechanism 500 for tilting the burner assembly 400. Specifically, the lifting mechanism 500, located on the same side of the furnace body 100 as the first pipe segment 781, is disposed on the side of the first pipe segment 781 facing the furnace body 100, in order to shorten the torque required by the lifting mechanism 500 to drive the burner assembly 400 to lift, thereby ensuring lifting stability.

[0168] In some optional embodiments, the amount of fluid drawn into the suction pipe 720 per unit time through the suction hole 721 is greater than or equal to the amount of fluid blown out of the blowing pipe 730 per unit time through the outlet hole 732. This ensures that the suction pipe 720 draws in sufficient airflow, thereby providing sufficient air pressure when blowing through the blowing pipe 730. This allows for better heating of the product 10 without burning it. It should be noted that the fluid in this embodiment can be flue gas.

[0169] There are various ways to control the amount of fluid drawn into the suction tube 720 per unit time to be greater than or equal to the amount of fluid blown out through the outlet hole 732 per unit time. For example, this can be achieved by controlling the areas of the suction hole 721 and the outlet hole 732.

[0170] For example, the sum of the flow areas of the multiple suction holes 721 is greater than the sum of the flow areas of the multiple outlet holes 732, so that the inlet area of ​​the suction pipe 720 can be larger, thereby ensuring that more flue gas can enter the suction pipe 720. The outlet area of ​​the blowing pipe 730 is larger, so as to realize the high-pressure ejection of flue gas, so as to fully contact the product 10 and achieve the ideal effect.

[0171] Alternatively, the sum of the flow areas of the multiple suction holes 721 can be made greater than the sum of the flow areas of the multiple outlet holes 732 by controlling the number of suction holes 721 and outlet holes 732. In this case, as... Figure 5 As shown, the area of ​​the first inclined sidewall 731 with multiple outflow holes 732 is smaller than the area of ​​the second inclined sidewall 722 with multiple suction holes 721, so that the suction holes 721 have a larger arrangement area, and thus more suction holes 721 can be set.

[0172] In some alternative embodiments, the vertical cross-section of the suction pipe 720 is larger than that of the blowing pipe 730. Thus, the suction pipe 720 can carry more flue gas than the blowing pipe 730, thereby increasing the amount of flue gas flowing through the suction pipe 720 into the manifold 710, and ensuring that the flue gas is ejected at high pressure from the blowing pipe 730.

[0173] Optionally, such as Figure 17 and Figure 20 As shown, the flue gas recirculation system 700 also includes a diversion pipe 750 and a diversion regulating valve 760 disposed on the diversion pipe 750. One end of the diversion pipe 750 is connected to the manifold 710, and the other end extends to the outside of the furnace body 100. The fourth power unit 740 is configured to draw air from outside the furnace body 100 to the manifold 710 through the diversion pipe 750, and the diversion regulating valve 760 is configured to adjust the flow area of ​​the diversion pipe 750. When the flow area of ​​the diversion pipe 750 is not zero, air from outside the furnace body 100 can enter the manifold 710 through the diversion pipe 750 and mix with the flue gas inside the manifold 710. When the flow area of ​​the diversion pipe 750 is zero, air from outside the furnace body 100 cannot enter the manifold 710 through the diversion pipe 750.

[0174] During the operation of the drying oven, when encountering abnormal production processes or shearing / coiling changes, the running speed of product 10 within the oven body 100 will drop to 0. To prevent overheating of product 10, the heating power of the drying oven needs to be reduced as quickly as possible. However, when product 10 returns to its normal speed, the heating power needs to be restored to its normal value as quickly as possible. However, the oven body 100 is typically composed of an external steel structure shell and internal insulation material. During the cooling and heating processes of the oven 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.

[0175] In this embodiment, by setting up a diversion pipe 750, when it is necessary to quickly cool down the furnace body 100 and quickly reduce the moisture content in the atmosphere inside the furnace body 100, the diversion regulating valve 760 is controlled to open to the corresponding degree. Through the suction force of the fourth power component 740 (e.g., a circulating fan), air is drawn in from outside the furnace body 100 through the diversion pipe 750 and sent into the furnace body 100 through the blowing pipe 730, so that the temperature inside the furnace body 100 can be quickly reduced, shortening the cooling process time.

[0176] Furthermore, the flue gas inside the furnace body 100 is discharged through the flue gas emission system 600 in this embodiment. If no external air is introduced, the flue gas discharged through the flue gas emission system 600 is only the amount of flue gas generated by the combustion of the burner assembly 400, which reduces the power of the burner assembly 400. When the amount of flue gas decreases, the amount of flue gas discharged from the furnace body 100 also decreases, which is not conducive to the removal of moisture from the furnace body 100. In this embodiment, by setting the diversion pipe 750, 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 flue gas emission system 600 is the sum of the amount of flue gas and the amount of air, 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.

[0177] It should be noted that when air from outside the furnace body 100 needs to be introduced through the inlet pipe 750, the power of the fourth power component 740 (e.g., the circulating fan) needs to be increased. If the power of the fourth power component 740 remains unchanged, the addition of outside air will reduce the amount of fluid drawn through the suction pipe 720, thus failing to achieve the goal of not burning the product 10.

[0178] The flue gas circulation system 700 provided in this embodiment has suction pipes 720 and blowing pipes 730 installed on both sides inside the furnace body 100. The suction force generated by the fourth power component 740 draws high-temperature flue gas through the suction pipes 720, preventing direct contact with the surface of the product 10. The drawn high-temperature flue gas enters the manifold 710 from the suction pipes 720, and is then sent back into the furnace through the blowing pipes 730 by the action of the fourth power component 740. This achieves flue gas circulation and avoids energy waste.

[0179] The steps for processing grain-oriented silicon steel using the drying oven provided in this embodiment are as follows:

[0180] The steel strip passes through a coating machine, where a coating is applied to both its upper and lower surfaces. Product 10 then enters a drying oven. The steel strip encounters the incoming high-temperature flue gas, causing it to heat up. The steel strip continues forward, passing the burner assembly 400 installed above and below the furnace body 100. The infrared waves radiated by the porous media burner heat the water in the coating. The water in the coating rapidly heats up and evaporates into the furnace atmosphere. The flue gas from the porous media burner and the water vapor entering the furnace atmosphere are extracted and ejected by the flue gas emission system 600. Simultaneously, due to the operation of the flue gas circulation system 700, the combustion flue gas rapidly passes over the upper and lower surfaces of the steel strip, achieving a controllable temperature increase. After being heated in the drying oven, some moisture in the coating is removed, and the moisture content of the coating reaches the target value. The steel strip completes the drying and heating process and enters the next stage.

[0181] The drying oven provided in this embodiment has at least the following advantages:

[0182] 1. Rapid cooling components 300 are installed in the vertical direction of product 10 (e.g., steel plate or strip), that is, at the top and bottom of furnace body 100. The power unit 312 (e.g., a motor) of the rapid cooling component 300 located outside the furnace body 100 drives the disturbance structure 311 (e.g., rotating blades) inside the furnace body 100. The strong agitation of the disturbance structure 311 inside the furnace body 100 achieves rapid flow of flue gas inside the furnace. Furthermore, the cold air is quickly dispersed by the disturbance structure 311, further shortening the time for furnace temperature to drop, and at the same time achieving uniform temperature inside the furnace, avoiding the formation of high-temperature dead zones. The second power unit 310, in conjunction with the second cooling pipe 320, inputs cold air into the furnace body 100. The second power unit 310 has a frequency conversion function, and the second cooling pipe 320 is equipped with a regulating valve to achieve controllable cold air supply, enabling small-scale cooling inside the furnace body 100.

[0183] II. A gas circulation system is configured for the heating method of the porous media burner. This gas circulation system has the function of "internal circulation of flue gas in the furnace + introduction of external cold air". Since each porous media burner of the burner assembly 400 is also at minimum power when the drying furnace is in the cooling state, the airflow disturbance required for removing moisture from the coating on the steel plate surface is reduced. In this embodiment, a flow regulating valve 760 is provided on the flow regulating valve 750. By opening the flow regulating valve 760, external cold air is sent into the furnace body 100 to further achieve a rapid reduction in furnace temperature; high-temperature flue gas is extracted through the suction pipe 720 and then sent back into the furnace body 100 through the blowing pipe 730. Both the suction pipe 720 and the blowing pipe 730 extend along the width direction of the steel plate and strip, and the extraction of flue gas is carried out in the width direction of the steel plate and strip. At the same time, the introduction of flue gas is also in the width direction of the steel plate and strip. On the one hand, we need to consider the uniformity of moisture removal in the width direction of the steel plate and strip; on the other hand, we need to consider achieving strong flow of flue gas within 100 mm of the furnace body.

[0184] Third, this embodiment targets a porous media burner. The internal circulation of flue gas only accelerates the flow of flue gas within the furnace; however, the continuous flue gas generated by the combustion of the fuel needs to be discharged from the furnace in a timely manner. If the discharge is obstructed or unstable, it will severely affect the drying of the coating. In this embodiment, several flue gas vents are provided on the furnace body 100. These vents are not directly connected to the third power component 630 of the flue gas emission system 600 via pipes, but rather discharged through an "ejector" method. This "ejector" design achieves smooth flue gas discharge and cleverly utilizes the ejector structure to incorporate external cold air, thereby lowering the temperature of the flue gas entering the third power component 630 and reducing the high-temperature resistance requirements of the third power component 630. The ejector method is also crucial for stabilizing the flue gas pressure within the furnace body 100. Specifically, the exhaust volume Q1 of the third power component 630 is a constant, the amount of outside cold air mixed in Q2, and the amount of flue gas extracted from the furnace Q3 satisfy the following relationship:

[0185] Q1 = Q2 + Q3

[0186] The power of the drying furnace mainly depends on the production capacity of the steel plates and strips. Once the production capacity of the steel plates and strips is determined, the maximum power of the drying furnace is also determined. Under maximum power conditions, the amount of flue gas Q3 generated by the combustion of gas in the burner assembly 400 is determined. Based on this, the exhaust volume Q1 of the third power component 630 is basically determined. Compared to the maximum power of the drying furnace, when the power of the porous media burner is reduced, the amount of flue gas Q3 in the furnace decreases accordingly, and the amount of external cold air mixed in Q1 increases accordingly. Therefore, regardless of how the power of the drying furnace (i.e., the power of the burner assembly 400) changes, the flue gas pressure inside the furnace body 100 is stabilized through the constant power operation of the third power component 630.

[0187] IV. In this embodiment, the burner assembly 400 adopts a roll-up opening structure. However, this structure is designed for the convenience of burner maintenance. Rapid cooling within the furnace body 100 does not require flipping the burner assembly 400.

[0188] 5. During normal operation of the drying oven (including the stage when the speed of the steel plate and strip is 0), the burner assembly 400 is in a closed state. When the speed of the steel plate drops to 0, the power of the burner assembly 400 decreases. While maintaining the minimum power for infrared radiation, the cooling system consisting of the first cooling pipe 210, the cooling regulating valve 220, and the first power component 230 intervenes to control the furnace temperature within a certain range.

[0189] Secondly, this embodiment provides an operation control method for a drying oven, used to control the drying oven in the first aspect, enabling rapid cooling of the drying oven. The operation control method for the drying oven provided in this embodiment has the same beneficial effects as the drying oven in the first aspect, and will not be described in detail here.

[0190] The operation control method for the drying oven includes normal operation procedures.

[0191] Specifically, the normal operating procedures include:

[0192] Adjust the opening of the cooling regulating valve 220 to 0 and control the first power component 230 to be in the closed state;

[0193] During normal operation, the temperature inside the furnace body 100 is sufficient for heating and drying the product 10. Therefore, there is no need to introduce cold air into the furnace body 100 through the first cooling pipe 210. At this time, the opening degree of the cooling regulating valve 220 is controlled to be 0 to ensure that the temperature inside the furnace body 100 remains within a certain range. Specifically, an opening degree of 0 for the cooling regulating valve 220 means that the cooling regulating valve 220 is in the closed state. An opening degree greater than 0 for the cooling regulating valve 220 means that the cooling regulating valve 220 is in the open state.

[0194] For example, the operation control method of the drying oven also includes a rapid cooling step.

[0195] Specifically, the rapid cooling steps include:

[0196] S101. Determine whether the moving speed of the product inside the furnace body 100 is less than or equal to the speed setting value; if yes, proceed to step S102; if no, proceed to step S103.

[0197] S102, Adjust the opening of the cooling regulating valve 220 to be greater than 0, and control the first power component 230 to start, so that the first power component 230 introduces fluid into the furnace body 100 through the first cooling pipe 210 and the first cooling interface 110, so that the temperature inside the furnace body 100 drops.

[0198] S103. Adjust the opening degree of the cooling regulating valve 220 to 0.

[0199] When the drying oven encounters abnormal production or shearing and coil changing, the running speed of the product in the oven body 100 will drop to 0. Therefore, it is necessary to quickly reduce the temperature inside the oven body 100. At this time, a rapid cooling step can be performed, so that the first power unit 230 introduces a large amount of cold air into the oven body 100 through the first cooling pipe 210, so that the temperature inside the oven body 100 drops rapidly.

[0200] In step S101, the speed setting value can be a manually set value, such as 5m / s, 2m / s, 0, etc. This embodiment does not limit this.

[0201] In one possible implementation, the drying oven includes a controller, which may include, but is not limited to, a host computer, etc., which is not limited in this embodiment. The controller is connected to the cooling regulating valve 220 and the first power component 230. The cooling regulating valve 220 can be a solenoid valve. The controller controls the opening degree of the cooling regulating valve 220 and controls the opening and closing of the first power component 230. A displacement detection device for detecting the running speed of the product can be installed inside the oven body 100. The displacement detection will send the detected displacement data to the controller. The controller will calculate, analyze, and determine whether the running speed of the product inside the oven body 100 is less than or equal to the speed set value.

[0202] In some optional embodiments, when the drying oven includes a rapid cooling component 300, the operation control method of the drying oven further includes a rapid cooling control step;

[0203] Specifically, the rapid cooling control steps include:

[0204] The second cooling pipe 320 is controlled to be in a conductive state so that the fluid outside the furnace body 100 can enter the furnace body 100 through the second cooling pipe 320;

[0205] The second power unit 310 is activated so that the disturbance structure 311 located within the furnace body 100 disturbs the fluid input into the second cooling pipeline 320.

[0206] It should be noted that when a large temperature reduction is required within the furnace body 100, a large amount of cold air at a high velocity can be introduced into the furnace body 100 through the cooperation of the first power component 230 and the first cooling pipe 210. For smaller temperature reduction requirements, the rapid cooling component 300 can be used. It is also understandable that when a large temperature reduction is required within the furnace body 100, cold air can be introduced into the furnace body 100 through both the first cooling pipe 210 and the second cooling pipe 320, and the agitation function of the second power component 310 can be used to rapidly diffuse the cold air within the furnace body 100, further increasing the cooling rate.

[0207] For example, when the drying oven includes a flue gas emission system 600, the operation control method of the drying oven also includes a flue gas emission control step;

[0208] Specifically, the smoke control steps include:

[0209] Adjust the opening of the flue gas regulating valve 640 on the branch flue gas pipe assembly 620 near the furnace body 100 inlet to be greater than the opening of the flue gas regulating valve 640 on the branch flue gas pipe assembly 620 near the furnace body 100 outlet.

[0210] Control the third power component 630 to operate at a constant power.

[0211] In the vertical direction of the product 10's running direction, matching the arrangement of the burner assembly 400, the furnace body 100 is provided with one or more exhaust ports. Each exhaust port's branch exhaust pipe assembly 620 is equipped with an exhaust regulating valve 640. By adjusting the opening of the exhaust regulating valve 640, the controllable discharge of flue gas within the furnace body 100 in the product 10's running direction can be achieved. This controllable discharge of flue gas is consistent with the moisture removal pattern of the product 10's coating. For example, when the product 10 first enters the furnace, it has high moisture content, resulting in high moisture content in the flue gas. Therefore, the flow rate at the exhaust port at the furnace body 100 inlet is high to accelerate moisture removal and reduce condensation; thus, the opening of the exhaust regulating valve 640 at this location needs to be controlled to be large. Conversely, the flow rate at the exhaust port at the furnace body 100 outlet is lower, requiring the opening of the exhaust regulating valve 640 at this location to be controlled to be smaller.

[0212] When there is one flue gas outlet, the flue gas outlet is located above the inlet or outlet of the furnace body 100.

[0213] Optionally, when the drying oven includes a flue gas recirculation system 700, the operation control method of the drying oven also includes a flue gas recirculation control step;

[0214] Specifically, the flue gas recirculation control steps include:

[0215] The fourth power unit 740 is started, and the flue gas in the furnace body 100 is drawn into the manifold 710 through the suction pipe 720. The flue gas in the manifold 710 is then pushed into the furnace body 100 through the blow pipe 730 to achieve flue gas circulation.

[0216] For example, when the flue gas recirculation system 700 includes a diversion pipe 750 and a control valve disposed on the diversion pipe 750, the flue gas recirculation control steps further include:

[0217] S201. Determine whether the humidity inside the furnace body 100 is greater than the humidity setting value. If yes, proceed to step 202; otherwise, proceed to step S203.

[0218] S202. Adjust the opening of the control valve on the diversion pipe 750 and increase the power of the fourth power component 740 so that fluid is introduced into the manifold 710 through the diversion pipe 750 and the flue gas in the manifold 710 is pressed into the furnace body 100 through the blow pipe 730.

[0219] The opening degree of the control valve on the S203 regulating drainage tube 750 is 0.

[0220] Optionally, a humidity sensor may be installed inside the furnace body 100. The humidity sensor sends the detected humidity to the controller, and the controller determines the opening degree of the control valve on the drain pipe 750 based on the humidity.

[0221] In this embodiment, when the humidity inside the furnace body 100 is high, by setting up the drainage pipe 750, 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 the introduced air. At this time, the exhaust volume of the flue gas emission system 600 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. When cooling the furnace body 100, cold air can also be introduced into the furnace body 100 through the drainage pipe 750. The cold air mixes with the high-temperature flue gas, reducing the temperature of the flue gas in contact with the surface of the product 10 while avoiding drastic temperature changes that could cause quality problems with the product 10.

[0222] In step S201, the humidity setting value can be a value set manually, and this embodiment does not limit this.

[0223] It should be noted that if the purpose of opening the drain pipe 750 is to reduce the humidity inside the furnace body 100, the control valve on the drain pipe 750 can be closed once the humidity inside the furnace body 100 has been reduced to the required value.

[0224] In summary, the drying oven provided in this embodiment introduces cold air in three ways: the first is through the first cooling pipe 210, the second is through the second cooling pipe 320, and the third is through the drainage pipe 750. These three methods can be combined according to actual needs, and this embodiment does not limit them.

[0225] 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, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A drying oven, characterized in that, include: The furnace body (100) is provided with a first cooling interface (110), and a plurality of the first cooling interfaces (110) are arranged in an array along the length and width directions of the furnace body (100); The first cooling pipe (210) has one end connected to the first cooling interface (110) and communicates with the interior of the furnace body (100) through the first cooling interface (110); A cooling regulating valve (220) is provided in the first cooling pipeline (210) and is used to adjust the flow area of ​​the first cooling pipeline (210); The first power unit (230) is connected to the other end of the first cooling pipe (210). The first power unit (230) is used to input fluid into the furnace body (100) through the first cooling pipe (210). The first power unit (230) has a frequency conversion function and can adjust the power of the first power unit (230) according to the cooling needs in the furnace body (100). The first cooling pipe (210) is provided in one or more, and each first cooling pipe (210) corresponds to a first cooling interface (110) on the furnace body (100). Each first cooling pipe (210) is provided with the cooling regulating valve (220). When multiple first cooling pipes (210) are provided, multiple first cooling pipes (210) are connected to the same first power component (230). The drying oven also includes a burner assembly (400), and a plurality of the burner assemblies (400) are provided at the top and bottom of the oven body (100). Each burner assembly (400) includes at least one porous media burner. The drying oven also includes a flue gas emission system (600), which includes a main exhaust pipe (610), a branch exhaust pipe assembly (620), and a third power component (630). The branch flue assembly (620) includes a first flue branch pipe (621) and a second flue branch pipe (622). The inlet of the first flue branch pipe (621) is connected to the furnace body (100). The outlet of the first flue branch pipe (621) and the inlet of the second flue branch pipe (622) are spaced apart. The area of ​​the outlet of the first flue branch pipe (621) is smaller than the area of ​​the inlet of the second flue branch pipe (622). The outlet of the second flue branch pipe (622) is connected to the main flue pipe (610). The inlet of the third power component (630) is connected to the main flue pipe (610), and the third power component (630) is used to draw the flue gas in the main flue pipe (610). When the power of the burner in the furnace body (100) decreases and the amount of flue gas produced decreases, outside air is introduced through the gap between the outlet of the first exhaust branch pipe (621) and the inlet of the second exhaust branch pipe (622). The reduced amount of flue gas is filled by introducing air while the exhaust volume of the third power unit (630) remains unchanged. The second exhaust branch pipe (622) includes a connecting pipe section (6221) and an ejector pipe section (6222). The connecting pipe section (6221) has a constant diameter structure, and the ejector pipe section (6222) has a variable diameter structure. The flow area of ​​the ejector pipe section (6222) connected to one end of the connecting pipe section (6221) is smaller than the area of ​​the ejector pipe section (6222) away from the end of the connecting pipe section (6221). The axis of the ejector pipe section (6222) coincides with the axis of the first exhaust branch pipe (621).

2. The drying oven according to claim 1, characterized in that, The drying oven also includes a rapid cooling component (300), which includes a second power component (310) and a second cooling pipe (320). The second power component (310) is installed in the furnace body (100) and has a disturbance structure (311) located inside the furnace body (100). One end of the second cooling pipe (320) is located outside the furnace body (100) and the other end is located inside the furnace body (100), and is used to selectively input fluid into the furnace body (100). The disturbance structure (311) is used to disturb the fluid input into the furnace body (100) through the second cooling pipe (320).

3. The drying oven according to claim 2, characterized in that, The furnace body (100) is provided with a plurality of rapid cooling components (300) at both the top and bottom. The plurality of rapid cooling components (300) at the top and bottom of the furnace body (100) are spaced apart along the length of the furnace body (100).

4. The drying oven according to claim 3, characterized in that, The rapid cooling assembly (300) and the burner assembly (400) at the top of the furnace body (100) are alternately arranged along the length of the furnace body (100); the rapid cooling assembly (300) and the burner assembly (400) at the bottom of the furnace body (100) are alternately arranged along the length of the furnace body (100).

5. The drying oven according to claim 1, characterized in that, Multiple branch flue pipe assemblies (620) are provided, and each branch flue pipe assembly (620) is provided with a flue gas regulating valve (640). The flue gas regulating valve (640) is used to adjust the flow area of ​​the branch flue pipe assembly (620). Multiple branch flue pipe assemblies (620) are spaced apart along the length direction of the furnace body (100).

6. The drying oven according to claim 1, characterized in that, The drying oven also includes a flue gas circulation system (700), which includes a manifold (710), a suction pipe (720), a blowing pipe (730), and a fourth power component (740). A manifold (710) is installed in the furnace body (100); a suction pipe (720) is connected to the manifold (710), and the suction pipe (720) is provided with a plurality of suction holes (721), and the suction pipe (720) is located inside the furnace body (100); a blow pipe (730) is located inside the furnace body (100), and the blow pipe (730) is connected to the manifold (710); the fourth power component (740) is used to draw the flue gas in the furnace body (100) to the manifold (710) through the suction pipe (720), and to press the flue gas in the manifold (710) into the furnace body (100) through the blow pipe (730).

7. The drying oven according to claim 6, characterized in that, The flue gas circulation system (700) further includes a diversion pipe (750) and a diversion regulating valve (760) disposed on the diversion pipe (750). One end of the diversion pipe (750) is connected to the manifold (710), and the other end of the diversion pipe (750) extends to the outside of the furnace body (100). The fourth power unit (740) is configured to draw air from outside the furnace body (100) to the manifold (710) through the diversion pipe (750). The diversion regulating valve (760) is configured to control the flow area of ​​the diversion pipe (750).

8. A method for controlling the operation of a drying oven, applied to the drying oven as described in any one of claims 1-7, characterized in that, The operation control method for the drying oven includes normal operation procedures; Normal operating procedures include: Adjust the opening degree of the cooling regulating valve (220) to 0, and control the first power component (230) to be in the closed state; The operation control method of the drying oven also includes a rapid cooling step; Rapid cooling steps include: S101. Determine whether the moving speed of the product inside the furnace body (100) is less than or equal to the speed setting value; if yes, proceed to step S102; if no, proceed to step S103. S102, Adjust the opening of the cooling regulating valve (220) to be greater than 0, and control the first power component (230) to start, so that the first power component (230) introduces fluid into the furnace body (100) through the first cooling pipeline (210) and the first cooling interface (110) to reduce the temperature inside the furnace body (100); S103, Adjust the opening degree of the cooling regulating valve (220) to 0.

9. The method for controlling the operation of a drying oven according to claim 8, characterized in that, The drying oven also includes a rapid cooling component (300), and the operation control method of the drying oven also includes a rapid cooling control step; The rapid cooling control steps include: The second cooling pipe (320) is controlled to be in the conducting state so that the fluid outside the furnace body (100) can enter the furnace body (100) through the second cooling pipe (320); The second power unit (310) is activated so that the second power unit (310) located in the furnace body (100) disturbs the fluid input into the furnace body (100) through the disturbance structure (311).

10. The method for controlling the operation of a drying oven according to claim 8, characterized in that, The drying oven also includes a flue gas emission system (600), and the operation control method of the drying oven also includes a flue gas control procedure; Smoke control procedures include: Adjust the opening of the flue gas regulating valve (640) on the branch flue gas pipe assembly (620) near the furnace body (100) inlet to be greater than the opening of the flue gas regulating valve (640) on the branch flue gas pipe assembly (620) near the furnace body (100) outlet; Control the third power component (630) to operate at a constant power.

11. The method for controlling the operation of a drying oven according to claim 10, characterized in that, The drying oven also includes a flue gas recirculation system (700), and the operation control method of the drying oven also includes a flue gas recirculation control step; The flue gas recirculation control steps include: The fourth power unit (740) is started, and the flue gas in the furnace body (100) is drawn into the manifold (710) through the suction pipe (720), and the flue gas in the manifold (710) is pressed into the furnace body (100) through the blow pipe (730) to realize flue gas circulation; The flue gas recirculation system (700) includes a diversion pipe (750) and a control valve disposed on the diversion pipe (750). The flue gas recirculation control steps also include: S201. Determine whether the humidity inside the furnace body (100) is greater than the humidity setting value. If yes, proceed to step 202; otherwise, proceed to step S203. S202. Adjust the opening of the control valve on the diversion pipe (750) to be greater than 0, and increase the power of the fourth power unit (740) so that fluid is introduced into the manifold (710) through the diversion pipe (750), and the flue gas in the manifold (710), i.e. the fluid drawn out, is pressed into the furnace body (100) through the blow pipe (730); S203. Adjust the opening degree of the control valve on the drainage tube (750) to 0.

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