Drying furnace and operation control method thereof

Abstract

The invention belongs to the technical field of heating, and discloses a drying furnace and an operation control method thereof.The drying furnace comprises a furnace body, a first cooling pipeline, a cooling adjusting valve and a first power piece, and the furnace body is provided with a first cooling connector; one end of the first cooling pipeline is connected to the first cooling connector and communicates with the interior of the furnace body through the first cooling connector. The cooling adjusting valve is arranged on the first cooling pipeline and used for adjusting the overflowing area of the first cooling pipeline. The other end of the first cooling pipeline is connected to the first power piece, and the first power piece is used for inputting fluid into the furnace body through the first cooling pipeline. According to the drying furnace, the product quality can be guaranteed, components such as a sensor installed on the furnace body cannot be damaged due to high temperature, stable operation of the drying furnace is guaranteed, and the operation cost of the drying furnace is further reduced.

Description

Technical Field

[0001] The present invention relates to the field of heating technology, and in particular to a drying furnace and an operation control method thereof. Background Art

[0002] The insulating coating on the surface of oriented silicon steel mainly includes three categories: inorganic coating, organic coating and semi-inorganic coating. The coating on the surface of oriented silicon steel is usually dried in a drying furnace.

[0003] In the prior art, a burner is provided in the furnace body of the drying furnace, and the burner releases heat into the furnace body to heat the product in the furnace body so that the product can be dried. When encountering an abnormal production process or shearing and changing rolls, the running speed of the product will drop to 0. In order to prevent the products trapped in the furnace from overburning, it is necessary to control the temperature in the furnace body to drop rapidly. However, the burner in the prior art cannot adjust the power and can only burn at a fixed power. Therefore, the furnace body can only be cooled quickly by flipping the burner so that the burner is facing the air. However, after flipping the burner, the high-temperature flue gas generated by the burner will have a great impact on the cylinders on both sides of the burner used to drive the burner and the sensors installed on the furnace body, which will cause damage to the cylinders and sensors, affect the stability of the drying furnace operation, and increase the operating cost. Summary of the invention

[0004] The object of the present invention is to provide a drying furnace and an operation control method thereof, so as to solve the problems of poor stability and high operation cost existing in the prior art.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] A drying furnace is provided, comprising:

[0007] A furnace body, wherein the furnace body is provided with a first cooling interface;

[0008] a first cooling pipeline, one end of which is connected to the first cooling interface and communicates with the interior of the furnace body through the first cooling interface;

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

[0010] A first power member, the other end of the first cooling pipeline is connected to the first power member, and the first power member is used to input fluid into the furnace body through the first cooling pipeline.

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

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

[0013] Optionally, the drying furnace also includes a quick cooling component, which includes a second power component and a second cooling pipeline. The second power component is installed on the furnace body, and the second power component has a disturbance structure located inside the furnace body. One end of the second cooling pipeline is located outside the furnace body, and the other end is located inside the furnace body, and is used to selectively input fluid into the furnace body. The disturbance structure is used to disturb the fluid input into the furnace body through the second cooling pipeline.

[0014] Optionally, a plurality of the quick cooling components are provided at the top and the bottom of the furnace body, and the plurality of the quick cooling components at the top and the bottom of the furnace body are arranged at intervals along the length direction of the furnace body.

[0015] Optionally, the drying furnace further comprises a burner assembly, and a plurality of the burner assemblies are disposed on the top and the bottom of the furnace body;

[0016] The quick cooling components and the burner components on the top of the furnace body are alternately arranged along the length direction of the furnace body; the quick cooling components and the burner components on the bottom of the furnace body are alternately arranged along the length direction of the furnace body.

[0017] Optionally, the burner assembly is rotatably connected to the furnace body, and the drying furnace further comprises a lifting mechanism, each of the burner assemblies is connected to at least one of the lifting mechanisms, and the lifting mechanism is used to drive the connected burner assembly to rotate relative to the furnace body.

[0018] Optionally, the drying furnace further comprises a smoke exhaust system, wherein the smoke exhaust system comprises a main smoke exhaust pipe, a branch smoke exhaust pipe assembly and a third power member;

[0019] The branch smoke exhaust pipe assembly includes a first smoke exhaust branch pipe and a second smoke exhaust branch pipe, the smoke inlet of the first smoke exhaust branch pipe is connected to the furnace body, the smoke outlet of the first smoke exhaust branch pipe is spaced apart from the smoke inlet of the second smoke exhaust branch pipe, and the smoke outlet of the second smoke exhaust branch pipe is connected to the main smoke exhaust pipe; the inlet of the third power component is connected to the main smoke exhaust pipe, and the third power component is used to draw smoke in the main smoke exhaust pipe.

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

[0021] Optionally, the drying furnace further comprises a flue gas circulation system, wherein the flue gas circulation system comprises a converging cavity, a suction pipe, a blowing pipe and a fourth power member;

[0022] A confluence cavity is installed on the furnace body; a suction pipe is connected to the confluence cavity, and the suction pipe is provided with a plurality of suction holes, and the suction pipe is arranged in the furnace body; the blow pipe is arranged in the furnace body, and the blow pipe is connected to the confluence cavity; the fourth power member is used for sucking the flue gas in the furnace body into the confluence cavity through the suction pipe, and for pressurizing the flue gas in the confluence cavity into the furnace body through the blow pipe.

[0023] Optionally, the flue gas circulation system also includes a drainage pipe and a drainage regulating valve arranged on the drainage pipe, one end of the drainage pipe is connected to the confluence cavity, and the other end of the drainage pipe extends to the outside of the furnace body, the fourth power component is configured to draw air from the outside of the furnace body to the confluence cavity through the drainage pipe, and the drainage regulating valve is configured to control the flow area of ​​the drainage pipe.

[0024] A drying furnace operation control method is provided, which is applied to the above drying furnace. The drying furnace operation control method includes a normal operation step;

[0025] The normal operation steps include:

[0026] Adjust the opening of the temperature-lowering regulating valve to 0, and control the first power member to be in a closed state;

[0027] The operation control method of the drying furnace also includes a rapid temperature reduction step;

[0028] The operation control method of the drying furnace also includes a rapid temperature reduction step;

[0029] The rapid cooling steps include:

[0030] S101, determining whether the moving speed of the product in the furnace is less than or equal to the speed setting value; if so, executing step S102, if not, executing step S103;

[0031] S102, adjusting the opening of the temperature-lowering regulating valve to be greater than 0, and controlling the first power member to start, so that the first power member passes a fluid into the furnace body through the first temperature-lowering pipeline and the first temperature-lowering interface, so as to reduce the temperature inside the furnace body;

[0032] S103, adjusting the opening of the cooling control valve to 0.

[0033] Optionally, the drying furnace further includes a quick cooling component, and the operation control method of the drying furnace further includes a quick cooling control step;

[0034] The rapid cooling control steps include:

[0035] Controlling the second cooling pipeline to be in a conducting state so that the fluid outside the furnace body can enter the furnace body through the second cooling pipeline;

[0036] The second power member is controlled to start, so that the disturbance structure of the second power member located in the furnace body disturbs the fluid input into the furnace body through the second cooling pipeline.

[0037] Optionally, the drying furnace further includes a smoke exhaust system, and the operation control method of the drying furnace further includes a smoke exhaust control step;

[0038] Smoke control steps include:

[0039] Adjust the opening of the smoke exhaust regulating valve on the branch smoke exhaust pipe assembly near the furnace inlet to be greater than the opening of the smoke exhaust regulating valve on the branch smoke exhaust pipe assembly near the furnace outlet;

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

[0041] Optionally, the drying furnace further includes a flue gas circulation system, and the operation control method of the drying furnace further includes a flue gas circulation control step;

[0042] The steps of flue gas circulation control include:

[0043] The fourth power member is controlled to start, so as to draw the smoke in the furnace body to the converging cavity through the suction pipe, and to pressurize the smoke in the converging cavity into the furnace body through the blowing pipe, so as to realize the smoke circulation;

[0044] The flue gas circulation system includes a drainage pipe and a control valve arranged on the drainage pipe, and the flue gas circulation control step also includes:

[0045] S201, determine whether the humidity in the furnace is greater than the humidity setting value, if so, execute step 202; if not, execute step S203;

[0046] S202, adjusting the opening of the control valve on the drainage pipe to be greater than 0, and increasing the power of the fourth power member, so that the fluid is introduced into the confluence cavity through the drainage pipe, and the flue gas in the confluence cavity, that is, the fluid drawn out, is pressed into the furnace body through the blowing pipe;

[0047] S203, adjusting the opening of the control valve on the drainage pipe to 0.

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

[0049] A cooling regulating valve is arranged on the first cooling pipeline, and the cooling regulating valve can adjust the flow area of ​​the first cooling pipeline. When encountering an abnormal production process, the cooling regulating valve can be adjusted to make the first cooling pipeline connected with the inside of the furnace body, and start the first power member, and the first power member inputs cold air into the furnace body through the first cooling pipeline to rapidly reduce the temperature in the furnace body, thereby avoiding the problem of overburning of products and ensuring the quality of products. In addition, there is no need to move the heat source installed on the furnace body, so that components such as sensors installed on the furnace body will not be damaged due to high temperature, thereby ensuring the stable operation of the drying furnace and reducing the operating cost of the drying furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0051] Figure 1 is a schematic structural diagram of a drying furnace provided in an embodiment of the present invention;

[0052] Figure 2 It is a schematic diagram of a first cooling pipeline and a cooling regulating valve, namely, a first power component, provided in an embodiment of the present invention;

[0053] Figure 3 The present invention Figure 1 The enlarged view of point A is shown;

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

[0055] Figure 5 The present invention Figure 4 The enlarged view of point B is shown;

[0056] Figure 6 The present invention Figure 4 The enlarged view of point C is shown;

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

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

[0059] Fig. 9 is a second top view of the drying oven provided by the embodiment of the present invention;

[0060] Fig.10 The present invention Fig. 9DD section view shown;

[0061] Fig.11 is a second front view of the drying oven provided by the embodiment of the present invention;

[0062] Fig.12 is a partial schematic diagram of a flue gas exhaust system provided by an embodiment of the present invention;

[0063] Fig.13 is a top view of a portion of a smoke exhaust system provided by an embodiment of the present invention;

[0064] Fig.14 is a side view of a portion of a flue gas exhaust system provided by an embodiment of the present invention;

[0065] Fig.15 The present invention Fig.14 The enlarged view of point E is shown;

[0066] Fig.16 is a side view of a drying oven provided by an embodiment of the present invention;

[0067] Fig.17 is a structural schematic diagram of a flue gas circulation system provided by an embodiment of the present invention;

[0068] Fig.18 is a schematic diagram of the structure of a blowpipe provided by an embodiment of the present invention;

[0069] Fig.19 The present invention Fig.18 FF sectional view shown;

[0070] Fig. 20 is a side view of a flue gas circulation system provided by an embodiment of the present invention;

[0071] Fig.21 It is a top view of the flue gas circulation system provided by an embodiment of the present invention.

[0072] In the figure:

[0073] 100, furnace body; 110, first cooling interface;

[0074] 210, first cooling pipeline; 220, cooling regulating valve; 230, first power element;

[0075] 300, fast cooling assembly; 310, second power member; 311, disturbance structure; 312, power body; 320, second cooling pipeline; 321, diffusion hole;

[0076] 400. burner assembly; 500. lifting mechanism;

[0077] 600, smoke exhaust system; 610, main smoke exhaust pipe; 611, first main pipe section; 612, second main pipe section; 613, third main pipe section; 620, branch smoke exhaust pipe assembly; 621, first smoke exhaust branch pipe; 6211, first branch pipe section; 6212, second branch pipe section; 622, second smoke exhaust branch pipe; 6221, connecting pipe section; 6222, ejector pipe section; 630, third power member; 640, smoke exhaust regulating valve; 650, support member;

[0078] 700, flue gas circulation system; 710, confluence cavity; 720, suction pipe; 721, suction hole; 722, second inclined side wall; 723, third end; 724, fourth end; 730, blow pipe; 731, first inclined side wall; 732, outflow hole; 733, first end; 734, second end; 740, fourth power member; 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 member;

[0079] 800, rotating mechanism; 900, chimney;

[0080] 10. Products;

[0081] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0082] In order 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 are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0083] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0084] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in 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., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0087] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be a central element.

[0088] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0089] On the first aspect, the present embodiment provides a drying furnace that can rapidly cool the furnace body by inputting air into the furnace body without flipping the burner, thereby ensuring the stability of the operation of the drying furnace and reducing the operating cost.

[0090] like Figures 1 to 6 As shown, the drying furnace includes a furnace body 100, a first cooling pipeline 210, a cooling regulating valve 220 and a first power member 230. By way of example, the furnace body 100 in this embodiment may be in the shape of a rectangular parallelepiped. For ease of description, the length direction of the furnace body 100 is referred to as the first direction X, the width direction of the furnace body 100 is referred to as the second direction Y, and the height direction of the furnace body 100 is referred to as the third direction Z. The product 10 may be transported to the furnace body 100 in a contactless manner for processing. For example, one end of the furnace body 100 in the length direction 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, and the first cooling interface 110 is arranged on the top wall of the furnace body 100. One end of the first cooling pipeline 210 is connected to the first cooling interface 110, and is communicated with the inside of the furnace body 100 through the first cooling interface 110. The cooling regulating valve 220 is arranged on the first cooling pipeline 210, and is used to adjust the flow area of ​​the first cooling pipeline 210. When the flow area of ​​the first cooling pipeline 210 is 0, the first cooling pipeline 210 can be controlled by the cooling regulating valve 220 not to be communicated with the inside of the furnace body 100. The other end of the first cooling pipeline 210 is connected and communicated with the first power member 230. The first power member 230 is used to input fluid into the furnace body 100 through the first cooling pipeline 210.

[0092] Exemplarily, the fluid may be air outside the furnace body 100 at room temperature, so that the air input into the furnace body 100 through the first cooling pipeline 210 is cold air relative to the internal environment of the furnace body 100, so as to achieve the purpose of lowering the temperature inside the furnace body 100.

[0093] It should be noted that the first power component 230 includes but is not limited to blowers, fans, etc., and this embodiment does not limit this. The first power component 230 has an outlet, and the outlet of the first power component 230 is connected and communicated with the first cooling pipeline 210. Exemplarily, the first power component 230 is a frequency conversion structure, 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 in 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, so as to cooperate with the first power component 230 to ensure rapid cooling.

[0094] The drying furnace provided in the present embodiment is provided with a cooling regulating valve 220 on the first cooling pipeline 210. The cooling regulating valve 220 can adjust the flow area of ​​the first cooling pipeline 210. When encountering an abnormal production process, the cooling regulating valve 220 can be adjusted to make the first cooling pipeline 210 communicate with the inside of the furnace body 100, and start the first power member 230. The first power member 230 inputs cold air into the furnace body 100 through the first cooling pipeline 210 to rapidly reduce the temperature in the furnace body 100, thereby avoiding the problem of overburning of the product 10 and ensuring the quality of the product 10. In addition, there is no need to move the heat source installed on the furnace body 100, so that components such as sensors installed on the furnace body 100 will not be damaged due to high temperature, thereby ensuring the stable operation of the drying furnace and reducing the operating cost of the drying furnace.

[0095] The first cooling pipeline 210 may be provided with one or more, which is not limited in this embodiment. When the first cooling pipeline 210 is provided with one, the first cooling interface 110 may be provided in the middle of the length direction of the furnace body 100 to improve the cooling efficiency and cooling effect. Of course, it can be understood that the first cooling interface 110 may also be close to the side of the furnace body 100 away from the smoke exhaust port, which is not limited in this embodiment.

[0096] In order to improve the uniformity of the temperature reduction at each position of the furnace body 100, Figure 2 As shown, there are a plurality of first cooling pipelines 210. Correspondingly, each first cooling pipeline 210 corresponds to a first cooling interface 110 on the furnace body 100, that is, Figure 8 As shown, there are also multiple first cooling interfaces 110, and multiple first cooling pipelines 210 are connected to the multiple first cooling interfaces 110 one by one. There are also multiple cooling regulating valves 220, and each first cooling pipeline 210 is provided with a cooling regulating valve 220. The multiple first cooling interfaces 110 can be arranged in an array along the length direction and width direction of the furnace body 100 to increase the speed of cooling inside the furnace body 100. In this embodiment, two first cooling interfaces 110 are provided on the top of the furnace body 100, and the two first cooling interfaces 110 are arranged in the middle of the furnace body 100 in the first direction X, and are arranged at intervals in the second direction Y. Exemplarily, two first cooling interfaces 110 can also be provided at the bottom of the furnace body 100, which is not limited in this embodiment.

[0097] For example, when there are multiple first cooling pipelines 210, the multiple first cooling pipelines 210 are connected to the same first power member 230, that is, there is one first power member 230. In this way, the utilization rate of the first power member 230 can be improved and the cost of the drying furnace can be reduced. For example, multiple first cooling pipelines 210 can be connected to a mixed pipeline through a three-way joint or a multi-way joint, and the mixed pipeline is connected and communicated with the outlet of the first power member 230.

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

[0099] By setting up the quick cooling component 300, when the inside of the drying furnace needs to be cooled slightly, air is input into the furnace body 100 through the second cooling pipeline 320. Since no power device is installed on the second cooling pipeline 320, the amount of air input into the furnace body 100 through the second cooling pipeline 320 will be smaller, usually less than the amount of air input into the furnace body 100 through the first cooling pipeline 210. Therefore, the quick cooling component 300 is suitable for cooling with a small gradient, and the first cooling pipeline 210, the cooling regulating valve 220 and the first power component 230 are suitable for cooling with a large gradient.

[0100] Alternatively, if Figure 6 As shown, the second power member 310 includes a power body 312 and the above-mentioned disturbance structure 311, the power body 312 is installed on the side wall of the furnace body 100, the disturbance structure 311 is connected to the output end of the power body 312, and the power body 312 drives the disturbance structure 311 to rotate to achieve disturbance of the gas inside the furnace body 100. The disturbance structure 311 includes but is not limited to blades.

[0101] In this embodiment, Figure 6As shown, the second cooling pipeline 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 one end of the second cooling pipeline 320 located in the furnace body 100 is provided with a plurality of diffusion holes 321, and air diffuses into the furnace body 100 through the plurality of diffusion holes 321, so that it can flow into the furnace body 100 more evenly, and will not blow directly to the surface of the product 10, so as to avoid the surface of the product 10 affecting the quality due to drastic temperature changes.

[0102] In one embodiment, the drying furnace further includes a fifth power member (not shown in the figure), which is connected to the second cooling pipeline 320 through a pipeline and is used to provide air to the second cooling pipeline 320. Since the pressure in the furnace body 100 is usually relatively high, the fifth power member provides air with a certain pressure to the second cooling pipeline 320, which can ensure that the air enters the furnace body 100 through the second cooling pipeline 320.

[0103] In order to ensure uniformity of small gradient temperature reduction in the furnace body 100, in some optional embodiments, such as Figure 4 As shown, a plurality of quick cooling components 300 are provided at the top and bottom of the furnace body 100, and the plurality of quick cooling components 300 at the top and bottom of the furnace body 100 are arranged at intervals along the length direction (i.e., the first direction X) of the furnace body 100. In this way, each area inside the furnace body 100 in the first direction X can achieve a small degree of temperature reduction, thereby improving the cooling effect and uniformity.

[0104] Furthermore, the quick cooling assemblies 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 to enhance the effect of facilitating diffusion in the width direction of the furnace body 100 .

[0105] In order to ensure the heating effect of the product 10 in the furnace body 100, as Figure 1 As shown, the drying oven further includes a burner assembly 400 , and a plurality of burner assemblies 400 are disposed on the top and the bottom of the oven body 100 so as to heat the two surfaces of the product 10 .

[0106] Exemplarily, the burner assembly 400 in this embodiment includes at least one porous medium burner. Porous medium combustion technology is a combustion method in which a mixture of gas and air burns in the pores of a porous medium. Porous medium combustion has three heat transfer methods: convection, conduction and radiation. The temperature in the combustion area is uniform and has a smooth temperature gradient. While the combustion is stable, it also has a high volumetric thermal intensity. Compared with free combustion, porous medium combustion has the advantages of high combustion rate, good combustion stability, large load adjustment range, large volumetric thermal intensity, small burner size, good gas adaptability, low pollutant emissions in flue gas, wider combustion limit, and combustible gas with very low calorific value. The multiple porous medium burners in each burner assembly 400 are arranged closely along the second direction Y.

[0107] In order to improve the production capacity, the product 10 will move at a certain speed in the furnace body 100 during the heating process. Based on this, in order to make the product 10 evenly heated when in the furnace body 100, the multiple burner assemblies 400 located at the top of the furnace body 100 are arranged at intervals along the first direction X, and the multiple burner assemblies 400 located at the bottom of the furnace body 100 are arranged at intervals along the first direction X.

[0108] In this embodiment, when the top and bottom of the furnace body 100 are provided with a plurality of burner assemblies 400 and a plurality of quick cooling assemblies 300, in this embodiment, Figure 1 and Figure 4 As shown, the quick cooling assembly 300 and the burner assembly 400 at the top of the furnace body 100 are alternately arranged along the length direction of the furnace body 100, and the quick cooling assembly 300 and the burner assembly 400 at the bottom of the furnace body 100 are alternately arranged along the length direction of the furnace body 100. In this way, the arrangement space on the furnace body 100 is fully utilized, and the cold air entering the furnace body 100 through the second cooling pipeline 320 can slow down or prevent the heat generated by the burner assembly 400 from reaching the surface of the product 10, thereby ensuring the quick cooling effect.

[0109] In some optional embodiments, the burner assembly 400 is rotatably connected to the furnace body 100, and the drying furnace further includes a lifting mechanism 500, and each burner assembly 400 is 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 overhaul 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, the lifting mechanism 500 and the rotating mechanism 800 are both disposed outside the furnace body 100, and are used to cooperate with each other to lift the burner assembly 400. For example, the lifting mechanism 500 includes a cylinder, and the output end of the cylinder is rotatably connected to the middle of one side in the width direction of the burner assembly 400, and one end of the burner assembly 400 in the length direction is rotatably disposed on the rotating mechanism 800, and the rotating mechanism 800 includes but is not limited to a rotating shaft. When the output end of the cylinder is extended or retracted, it can drive the burner assembly 400 to rotate relative to the furnace body 100, thereby realizing the conversion between the closed state and the lifted state. When the burner assembly 400 is in the closed state, such as Figure 1 As shown, the combustion surface of the burner assembly 400 faces the product 10 in the furnace body 100; when the burner assembly 400 is in the raised state, as shown in FIG. Figure 7 As shown, the burner assembly 400 is located outside the furnace body 100 and is in a vertical or inclined shape to facilitate inspection and maintenance.

[0111] When the porous medium burner is used to heat the product 10, the high temperature flue gas generated by the porous medium burner is released into the furnace body 100. Figure 1 As shown, the drying furnace is equipped with a fume exhaust system 600 .

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

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

[0114] Exemplarily, the inlet of the third power component 630 is connected to the main smoke exhaust pipe 610, and the third power component 630 is used to suck the smoke in the main smoke exhaust pipe 610, and then indirectly suck the smoke in the furnace body 100 through the main smoke exhaust pipe 610 and the branch smoke exhaust pipe assembly 620, and is used to transport the smoke to the chimney 900 to achieve smoke exhaust of the furnace body 100.

[0115] In some optional embodiments, the connection position between the branch exhaust pipe assembly 620 and the main exhaust pipe 610 is spaced from the connection position between the third power member 630 and the main exhaust pipe 610, that is, the axis of the smoke outlet of the branch exhaust pipe assembly 620 is different from the axis of the connection port between the main exhaust pipe 610 and the third power member 630, so that the smoke in the branch exhaust pipe assembly 620 will not be directly drawn to the third power member 630, but first enter the main exhaust pipe 610, and then flow to the third power member 630 after the direction is adjusted by the main exhaust pipe 610. For example, the third power member 630 can be a power device such as a blower or a fan, which is not limited in this embodiment.

[0116] The smoke exhaust system 600 provided in this embodiment has a branch smoke exhaust pipe assembly 620 connected to the furnace body 100 of the drying furnace, a main smoke exhaust pipe 610 connected to the furnace body 100 through the branch smoke exhaust pipe assembly 620, and a third power component 630 connected to the main smoke exhaust pipe 610. The smoke in the furnace body 100 is indirectly sucked through the main smoke exhaust pipe 610 and the branch smoke exhaust pipe assembly 620, so that the flow field of the smoke in the furnace body 100 does not change drastically but changes slowly, thereby reducing the disturbance of the smoke exhaust to the temperature distribution in the furnace body 100, avoiding the instability of the smoke in the furnace body 100, making the temperature of each position in the furnace body 100 more uniform, facilitating the control of the temperature distribution in the furnace body 100, and improving the heating effect of the product 10.

[0117] In some optional embodiments, such as Fig.12 As shown, the smoke exhaust pipe assembly 620 includes a first smoke exhaust branch pipe 621 and a second smoke exhaust branch pipe 622. The smoke inlet of the first smoke exhaust branch pipe 621 is connected to the furnace body 100, and the smoke outlet of the first smoke exhaust branch pipe 621 is spaced apart from the smoke inlet of the second smoke exhaust branch pipe 622. That is, this embodiment adopts an ejection method to exhaust smoke from the furnace body 100, which can further reduce the disturbance of the temperature in the furnace body 100 while ensuring smooth extraction of smoke in the furnace body 100, and has a better smoke exhaust effect.

[0118] Specifically, the third power part 630 in this embodiment can be a fixed frequency fan, that is, the exhaust volume of the third power part 630 is constant. The main source of smoke exhaust system 600 is burner combustion. When the burner power is reduced, the amount of smoke generated is reduced. When the fan exhaust volume is constant, in addition to the smoke, it will cause the external cold air to be sucked into the furnace body 100 through the gap of the furnace body 100, which has a great impact on the stability of the temperature in the furnace body 100.

[0119] In this embodiment, the smoke outlet of the first smoke exhaust branch pipe 621 and the smoke inlet of the second smoke exhaust branch pipe 622 are arranged at intervals, that is, the smoke outlet of the first smoke exhaust branch pipe 621 is not directly connected to the second smoke exhaust branch pipe 622. When the power of the burner in the furnace body 100 decreases and the amount of smoke generated decreases, the outside air can be introduced through the gap between the first smoke exhaust branch pipe 621 and the second smoke exhaust branch pipe 622, without sucking cold air into the furnace body 100 through the gap of the furnace body 100. When the exhaust volume of the third power part 630 remains unchanged, the total exhaust volume of the smoke exhaust system 600 = the amount of smoke generated in the furnace body 100 + the amount of air introduced through the gap between the first smoke exhaust branch pipe 621 and the second smoke exhaust branch pipe 622. The two change with the change of the smoke volume, but the total exhaust volume remains unchanged.

[0120] The smoke exhaust system 600 provided in the present embodiment has a first smoke exhaust branch pipe 621 of the smoke exhaust pipe assembly 620 that is connected to the furnace body 100 of the drying furnace, and a second smoke exhaust branch pipe 622 that is connected to the main smoke exhaust pipe 610. When the amount of smoke in the furnace body 100 decreases, the third power component 630 can introduce outside air through the gap between the first smoke exhaust branch pipe 621 and the second smoke exhaust branch pipe 622, and the introduced air volume can make up for the reduced amount of smoke without inhaling cold air into the furnace body 100 through the gap in the furnace body 100, thereby reducing the disturbance of the temperature distribution in the furnace body 100 caused by the smoke exhaust, avoiding the instability of the smoke in the furnace body 100, making the temperature at each position in the furnace body 100 more uniform, facilitating the control of the temperature distribution in the furnace body 100, and improving the heating effect of the product 10.

[0121] For example, the smoke outlet area of ​​the first smoke exhaust branch pipe 621 is smaller than the smoke inlet area of ​​the second smoke exhaust branch pipe 622, which ensures the effect of the extraction on the one hand, and on the other hand, enables the smoke inlet of the second smoke exhaust branch pipe 622 to draw as much smoke as possible from the smoke outlet of the first smoke exhaust branch pipe 621 to the second smoke exhaust branch pipe 622, thereby preventing smoke leakage and ensuring the environment of the space where the furnace body 100 is located. The smoke outlet of the second smoke exhaust branch pipe 622 is connected to the main smoke exhaust pipe 610, so that the smoke in the second smoke exhaust branch pipe 622 flows to the main smoke exhaust pipe 610.

[0122] Alternatively, if Fig.15As shown, the interval H between the smoke outlet of the first smoke exhaust branch pipe 621 and the smoke inlet of the second smoke exhaust branch pipe 622 has a value range of 10 mm to 100 mm. If the interval H between the smoke outlet of the first smoke exhaust branch pipe 621 and the smoke inlet of the second smoke exhaust branch pipe 622 is too large, the smoke flowing out of the smoke outlet of the first smoke exhaust branch pipe 621 will leak out, affecting the smoke exhaust effect, and also increasing the load of the third power member 630; if the interval H between the smoke outlet of the first smoke exhaust branch pipe 621 and the smoke inlet of the second smoke exhaust branch pipe 622 is too small, it is close to the direct connection between the first smoke exhaust branch pipe 621 and the second smoke exhaust branch pipe 622, and the effect of induced emission cannot be achieved. For example, the value of the interval H between the smoke outlet of the first smoke exhaust branch pipe 621 and the smoke inlet of the second smoke exhaust branch pipe 622 is 10 mm, 20 mm, 50 mm, 70 mm, 80 mm, 90 mm, 100 mm.

[0123] For example, the first smoke exhaust branch pipe 621 and the second smoke exhaust branch pipe 622 are both round pipes so as to have a larger flow area. Figure 5 As shown, the diameter of the smoke outlet of the first smoke exhaust branch pipe 621 is D, and the diameter of the smoke inlet of the second smoke exhaust branch pipe 622 is D2, D1<D2, and the difference between D1 and D2 is in the range of 100mm~200mm. The difference between the diameter of the smoke outlet of the first smoke exhaust branch pipe 621 and the diameter of the smoke inlet of the second smoke exhaust branch pipe 622 is large, which will cause the second smoke exhaust branch pipe 622 to inhale a large amount of air through the smoke inlet, thereby increasing the load requirements of the third power component 630. The long-term high-load operation of the third power component 630 will shorten the service life and increase unnecessary energy consumption, thereby increasing the cost of the smoke exhaust system 600. The difference between the diameter of the smoke outlet of the first smoke exhaust branch pipe 621 and the diameter of the smoke inlet of the second smoke exhaust branch pipe 622 is small, and there will be a problem of smoke leakage. For example, the difference between D1 and D2 is 100mm, 120mm, 150mm, 180mm, 200mm.

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

[0125] In some optional embodiments, see Fig.14The second smoke 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 smoke exhaust pipe 610, and the ejector pipe section 6222 is butted against the other end of the connecting pipe section 6221, that is, the inner diameter of the ejector pipe section 6222 near the end of 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 end of the connecting pipe section 6221 is larger than the smoke outlet area of ​​the first smoke exhaust branch pipe 621.

[0126] In this embodiment, the connecting pipe section 6221 is of a constant diameter structure, and the ejection pipe section 6222 is of a variable diameter structure. For example, the ejection pipe section 6222 is a truncated cone-shaped tube, and the flow area of ​​the ejection pipe section 6222 connected to one end of the connecting pipe section 6221 is smaller than the area of ​​the ejection pipe section 6222 away from the end of the connecting pipe section 6221. By setting the ejection pipe section 6222 in a truncated cone shape, the inner diameter of the ejection pipe section 6222 gradually changes along its axial direction, and the flow area close to the connecting pipe section 6221 is smaller, while the flow area close to the end of the smoke outlet of the first smoke exhaust branch pipe 621 is larger. After the smoke flows out from the smoke outlet of the first smoke exhaust branch pipe 621 and enters the ejector pipe section 6222, the flow velocity of the smoke in the ejector pipe section 6222 will increase due to the reduction in the flow area, so that the smoke around the ejector pipe section 6222 can be sucked into the ejector pipe section 6222, thereby improving the smoke exhaust effect and efficiency.

[0127] Optionally, in this embodiment, the axis of the ejector pipe section 6222 coincides with the axis of the first smoke exhaust branch pipe 621, so that the ejector pipe section 6222 can be directly opposite to the first smoke exhaust branch pipe 621, and the smoke exhausted from the first smoke exhaust branch pipe 621 enters the ejector pipe section 6222 under the action of inertia, further improving the smoke exhaust effect of the smoke exhaust system 600.

[0128] In some optional embodiments, such as Fig.14 As shown, the connecting pipe section 6221 is bent, that is, the smoke changes direction when flowing in the connecting pipe section 6221, which is equivalent to appropriately increasing the internal flow resistance of the smoke. On the basis of ensuring smooth smoking, the suction force of the smoke inlet of the connecting pipe section 6221 will not be too large, so as to further reduce the disturbance of the temperature in the furnace body 100. In this embodiment, the bending angle of the connecting pipe section 6221 is greater than 90° to avoid excessive resistance and failure to ensure the exhaust effect.

[0129] Alternatively, if Fig.11As shown, the flue gas exhaust system 600 includes a plurality of branch smoke exhaust pipe assemblies 620, and the plurality of branch smoke exhaust pipe assemblies 620 are arranged at intervals along the extension direction of the main smoke exhaust pipe 610 to exhaust smoke from different areas in the furnace body 100, so that the suction force out of the smoke inlet of each group of branch smoke exhaust pipe assemblies 620 does not need to be too large, and the smoke near the smoke inlet of the branch smoke exhaust pipe group in the furnace body 100 can be sucked to prevent excessive disturbance of the temperature in the furnace body 100.

[0130] For example, Fig.14 As shown, each group of branch smoke exhaust pipe assemblies 620 includes two branch smoke exhaust pipe assemblies 620, and the two branch smoke exhaust pipe assemblies 620 of each group are symmetrically arranged on both sides of the main smoke exhaust pipe 610 to further improve the smoke exhaust effect and uniformity, and less disturb the temperature in the furnace body 100.

[0131] In some optional embodiments, such as Fig.14 As shown, the smoke exhaust system 600 further includes a smoke exhaust regulating valve 640, which is disposed on the first smoke exhaust branch pipe 621 and is used to adjust the flow area of ​​the first smoke exhaust branch pipe 621. By providing the smoke exhaust regulating valve 640, when smoke exhaust is required, the opening of the smoke exhaust regulating valve 640 is adjusted to be not 0, so that the smoke in the furnace body 100 can flow out through the first smoke exhaust branch pipe 621. When smoke exhaust is not required, the opening of the smoke exhaust regulating valve 640 is adjusted to 0, so that the smoke cannot flow out of the first smoke exhaust branch pipe 621, and the external air will not flow into the furnace body 100 through the first smoke exhaust branch pipe 621, so that the smoke extraction power of the smoke exhaust system 600 is adjustable.

[0132] For example, Fig.14 As shown, the first smoke exhaust branch pipe 621 includes a first branch pipe section 6211 and a second branch pipe section 6212 that are connected to each other. The first branch pipe section 6211 is connected and communicated with the furnace body 100, and the second branch pipe section 6212 is arranged toward the ejection pipe section 6222. The smoke exhaust regulating valve 640 is arranged between the first branch pipe section 6211 and the second branch pipe section 6212.

[0133] In some optional embodiments, such as Fig. 9 As shown, the main smoke 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 direction of the furnace body 100 and is arranged 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 direction of the furnace body 100. Fig. 9 In the embodiment, the conveying direction of the product 10 is from right to left, that is, the material transport outlet of the furnace body 100 is arranged at Fig. 9The second main pipe section 612 is arranged at one end of the first main pipe section 611 close to 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 the third main pipe section 613 extends along the length direction of the furnace body 100, and the third power member 630 is arranged at one end of the third main pipe section 613 away from the second main pipe section 612.

[0134] In this embodiment, Fig.12 As shown, the main exhaust pipe 610 is fixed to the furnace body 100 through a support member 650. For example, two support members 650 are provided, one end of each of the two support members 650 is connected to the two ends of the main exhaust pipe 610, and the other end of each of the support members 650 extends toward the two ends of the furnace body 100 in the length direction and is connected to the furnace body 100.

[0135] For example, Fig.11 As shown, at least part of the smoke exhaust system 600 is arranged on the top of the furnace body 100, that is, the smoke exhaust port of the furnace body 100 is arranged on the top. The main smoke exhaust pipe 610 extends along the length direction of the furnace body 100, for example, the main smoke exhaust pipe 610 extends from one end to the other end of the furnace body 100 in the first direction X.

[0136] For example, Figure 8 and Fig. 9 As shown, the smoke exhaust system 600 includes a plurality of branch smoke exhaust pipe assemblies 620. The connection positions of the two branch smoke exhaust pipe assemblies 620 of each branch smoke exhaust pipe assembly 620 and the furnace body 100 (i.e., the smoke exhaust port of the furnace body 100) are arranged close to the edge of the furnace body 100 in the width direction. Since the product 10 runs continuously in the furnace body 100, it is equivalent to that there is a smoke barrier with a width equal to the width of the product 10 in the length direction of the furnace body 100, which causes the smoke to gather on both sides in the width direction of the furnace body 100. In this embodiment, a plurality of smoke exhaust ports are opened on the edge in the width direction of the top of the furnace body 100 for smoke exhaust, and each smoke exhaust port is connected to a branch smoke exhaust pipe assembly 620 to improve the balance of smoke exhaust.

[0137] In some optional embodiments, when the drying furnace is provided with a burner assembly 400, a plurality of groups of burner assemblies 400 are spaced apart along the length direction of the furnace body 100, and a smoke exhaust port may be provided between two adjacent burner assemblies 400 to ensure a smoke exhaust effect.

[0138] On the basis of using the porous medium combustion assembly, in order to prevent the high temperature flue gas generated by the porous medium combustion assembly from burning the product 10. In this embodiment, Figure 1 As shown, the drying furnace further includes a flue gas circulation system 700 .

[0139] Among them, Figures 16 to 21As shown, the smoke circulation system 700 includes a converging cavity 710, a suction pipe 720, a blowing pipe 730 and a fourth power member 740;

[0140] The confluence cavity 710 is installed in the furnace body 100. The confluence cavity 710 may be located outside the furnace body 100, embedded in the furnace body 100, or located inside the furnace body 100, which is not limited in this embodiment.

[0141] like Fig.17 As shown, the suction pipe 720 is connected to the confluence cavity 710, so that the smoke in the suction pipe 720 can flow to the confluence cavity 710. In addition, the suction pipe 720 is provided with a plurality of suction holes 721, and the suction pipe 720 is arranged in the furnace body 100, so that the smoke in the furnace body 100 can enter the suction pipe 720 through the plurality of suction holes 721.

[0142] The blow pipe 730 in this embodiment is connected to the confluence cavity 710, so that the flue gas in the confluence cavity 710 can flow to the blow pipe 730. In addition, the blow pipe 730 has a first inclined side wall 731, and the first inclined side wall 731 is provided with a plurality of outflow holes 732. The blow pipe 730 is arranged in the furnace body 100, so that the flue gas in the blow pipe 730 can be blown into the furnace body 100. The suction pipe 720 and the blow pipe 730 are arranged at intervals, so that the suction pipe 720, the blow pipe 730, and the confluence cavity 710 cooperate to form a circulation path for the flue gas.

[0143] The fourth power member 740 in this embodiment is configured to draw smoke from the suction pipe 720 to the confluence chamber 710, and to pressurize the smoke in the confluence chamber 710 to the blow pipe 730, so as to provide power for the flow of smoke in the circulation path. For example, the fourth power member 740 can be a blower, a fan or other power equipment, which is not limited in this embodiment.

[0144] The flue gas circulation system 700 provided in the present embodiment has a suction pipe 720 and a blow pipe 730 in the furnace body 100. The fourth power member 740 generates negative pressure in the suction pipe 720, so that the high-temperature flue gas in the furnace body 100 can enter the suction pipe 720 through the suction hole 721 under the suction of the fourth power member 740 and flow to the confluence cavity 710. The flue gas in the confluence cavity 710 enters the blow pipe 730 under the action of the fourth power member 740, and is blown out into the furnace body 100 through the outlet hole 732 under the high-pressure drive of the fourth power member 740, thereby realizing the circulation of flue gas and high The temperature of the hot flue gas will decrease in the process of flowing from the suction pipe 720 to the confluence cavity 710 and then flowing from the confluence cavity 710 to the blowing pipe 730. Therefore, even if the distance between the product 10 and the heat source in the furnace body 100 is small, the high-temperature flue gas will not be blown directly to the product 10. Even if the high-temperature flue gas contacts the product 10, the high-temperature flue gas will pass through the product 10 quickly under the suction action of the fourth power component 740, so that the contact time between the high-temperature flue gas and the product 10 is very short, which can avoid the burning of the product 10 by the high-temperature flue gas, ensure the quality of the product 10, and improve the reliability of the drying furnace.

[0145] Exemplarily, when the drying furnace includes a burner assembly 400, the first inclined side wall 731 is disposed on a side of the blowpipe 730 close to the adjacent burner assembly 400 and faces the product 10 in the furnace body 100. It should be noted that when one burner assembly 400 is provided in the furnace body 100, the first inclined side wall 731 is disposed on a side of the blowpipe 730 close to the burner assembly 400. When a plurality of burner assemblies 400 are provided in the furnace body 100, such as Figure 1 As shown, there are multiple flue gas circulation systems 700, and the multiple flue gas circulation systems 700 correspond one-to-one to the multiple burner assemblies 400. The first inclined side wall 731 of the blow pipe 730 of each flue gas circulation system 700 is arranged on one side of the blow pipe 730 close to the corresponding burner assembly 400.

[0146] Alternatively, if Fig.18 and Fig.19As shown, the value range of the angle b between the plane where the first inclined side wall 731 is located and the horizontal plane is 40°-50°. If the angle between the plane where the first inclined side wall 731 is located and the horizontal plane is too large, the first inclined side wall 731 approaches the vertical plane, which will result in a smaller area of ​​the first inclined side wall 731, and further result in a smaller layout area of ​​the outflow hole 732, which will further affect the amount of smoke blowing. In addition, the smoke blown out of the outflow hole 732 on the first inclined side wall 731 will not be directed toward the product 10, affecting the heating efficiency of the product 10. If the angle between the plane where the first inclined side wall 731 is located and the horizontal plane is too small, the first inclined side wall 731 approaches the horizontal plane, which will also affect the layout area of ​​the outflow hole 732, and the smoke blown out of the outflow hole 732 of the first inclined side wall 731 will directly blow the product 10, and there is a possibility of burning the product 10. For example, the angle b between the plane where the first inclined side wall 731 is located 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 the vertical direction, 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 side wall 731 allows the flue gas blown out by the first inclined side wall 731 to mix with the high-temperature flue gas released by the burner assembly 400, so as to achieve the purpose of reducing the temperature of the high-temperature flue gas, further avoiding the situation where the high-temperature flue gas directly contacts the product 10, and further improving reliability.

[0148] In some optional embodiments, such as Figure 5 As shown, the suction pipe 720 has a second inclined side wall 722. The second inclined side wall 722 is arranged on the side of the suction pipe 720 close to the burner assembly 400, and faces the product 10 in the furnace body 100. The suction holes 721 in this embodiment are arranged on the second inclined side wall 722. By providing the second inclined side wall 722, the arrangement area of ​​the suction holes 721 can be larger, and more suction holes 721 can be arranged. In addition, the second inclined side wall 722 is arranged on the side of the suction pipe 720 close to the burner assembly 400, and faces the product 10 in the furnace body 100, so that as much heat released by the burner assembly 400 as possible can be sucked into the suction pipe 720, thereby reducing the probability of high-temperature flue gas directly contacting the product 10.

[0149] Exemplarily, the angle between the plane where the second inclined side wall 722 is located and the horizontal plane is in the range of 40°-50°. For example, the angle between the plane where the second inclined side wall 722 is located and the horizontal plane is 40°, 42°, 45°, 48°, or 50°.

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

[0151] In some optional embodiments, the flow area of ​​the blow pipe 730 gradually increases along the direction from the second end 734 to the first end 733, that is, the blow pipe 730 is a tapered pipe along the direction from the first end 733 to the second end 734. The flow area of ​​the blow pipe 730 is the longitudinal cross-sectional area of ​​the inner cavity of the blow pipe 730. In this way, it can be ensured that the pressure of each position of the blow pipe 730 along the second direction Y is consistent, so as to ensure the uniformity of the smoke blown into the furnace body 100, thereby ensuring the uniformity of the smoke distribution in the furnace body 100, improving the heating effect on the product 10, and avoiding the situation where the second end 734 far away from the fourth power part 740 has a reduced smoke outflow due to too low gas pressure. It should be noted that in this embodiment, the apertures of multiple outflow holes 732 are the same.

[0152] In some optional embodiments, the suction tube 720 has a third end 723 in the extension direction (ie, 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 confluence cavity 710 than 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 tapered pipe along the direction from the third end 723 to the fourth end 724. Among them, the flow area of ​​the suction pipe 720 is the total cross-sectional area of ​​the inner cavity of the suction pipe 720. In this way, it can be ensured that the suction force of each position of the suction pipe 720 along the second direction Y is consistent, so as to ensure that the high-temperature flue gas of the furnace body 100 near the suction pipe 720 is sucked into the suction pipe 720, reduce the probability of high-temperature flue gas leakage, avoid the situation that the fourth end 724 far away from the fourth power part 740 cannot effectively exhaust the high-temperature flue gas due to too small suction force, and improve the efficiency of flue gas circulation. It should be noted that in this embodiment, the apertures of multiple suction holes 721 are the same.

[0154] In some other optional embodiments, the flow area of ​​the blow pipe 730 is the same along the direction from the second end 734 to the first end 733 of the blow pipe 730, and the flow area of ​​the outlet hole 732 gradually decreases. In this way, the pressure of each position of the blow pipe 730 along the second direction Y can be guaranteed to be consistent, so as to ensure the uniformity of the smoke blown into the furnace body 100, thereby ensuring the uniformity of the smoke distribution in the furnace body 100, improving the heating effect on the product 10, and avoiding the situation where the second end 734 far from the fourth power member 740 is far away from the fourth power member 740 due to too low gas pressure, resulting in a reduction in the smoke outflow.

[0155] In some other optional embodiments, the flow area of ​​the suction pipe 720 is the same along the direction from the fourth end 724 to the third end 723 of the suction pipe 720, and the flow area of ​​the suction hole 721 gradually decreases. In this way, it can be ensured that the suction force of each position of the suction pipe 720 along the second direction Y is consistent, so as to ensure that the high-temperature flue gas near the suction pipe 720 in the furnace body 100 is sucked into the suction pipe 720, reduce the probability of high-temperature flue gas leakage, avoid the situation that the fourth end 724 far from the fourth power member 740 cannot effectively exhaust the high-temperature flue gas due to too small suction force, and improve the efficiency of flue gas circulation.

[0156] Exemplarily, 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 orthographic projection of the suction pipe 720 on the product 10 passes through the product 10 to prevent the high-temperature smoke from blowing directly to 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 orthographic projection of the blowing pipe 730 on the product 10 passes through the product 10, so that the smoke blown out of the blowing pipe 730 can evenly contact various positions of the product 10 in the second direction Y to ensure the heating effect on the product 10.

[0157] In some optional embodiments, the suction pipe 720 and the blowing pipe 730 may be polygonal pipes, arc-shaped pipes, elliptical pipes, etc., which are not limited in this embodiment.

[0158] In this embodiment, Figure 4As shown, two suction pipes 720 and two blow pipes 730 are provided in a one-to-one correspondence. The two suction pipes 720 are arranged at intervals in the third direction Z, and the two blow pipes 730 are arranged at intervals in the third direction Z. The corresponding suction pipes 720 and blow pipes 730 are arranged at intervals in the first direction X. The conveying direction of the product 10 in the furnace body 100 is the length direction of the furnace body 100. By providing two groups of suction pipes 720 and blow pipes 730, one group of suction pipes 720 and blow 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 the product 10; the other group of suction pipes 720 and blow 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 the product 10, thereby ensuring that both the top and bottom surfaces of the product 10 will not be burned, further improving the reliability of the drying furnace, and ensuring the quality of the product 10.

[0159] Further optionally, a corresponding set of suction pipes 720 and blow pipes 730 are configured to abut against the inner top wall of the furnace body 100, and another corresponding set of suction pipes 720 and blow pipes 730 are configured to abut against the inner bottom wall of the furnace body 100, so that the blow pipes 730 will not be too close to the product 10, so as not to burn the product 10; and, by abutting against the furnace body 100, the suction pipes 720 and blow pipes 730 will not vibrate violently, thereby improving the stability of the suction pipes 720 and blow pipes 730, and further ensuring that the blow pipes 730 blow out smoke in a certain direction. For example, the surfaces of the suction pipes 720 and blow pipes 730 abutting against the furnace body 100 are both planes, further improving the abutment effect.

[0160] For example, Fig.17 or Fig. 20 As shown, the flue gas circulation system 700 also includes two supporting members 790, one end of one supporting 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 on the furnace body 100, thereby further improving the stability of the blow pipe 730.

[0161] In this embodiment, Fig.21 As shown, the suction pipe 720 has a third end 723 in the extension direction and a fourth end 724 arranged opposite to the third end 723, and the third end 723 is closer to the confluence cavity 710 relative to the fourth end 724. One end of the other of the two bearings 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 on the furnace body 100, further improving the stability of the suction pipe 720.

[0162] Optionally, the support member 790 may be a boom or other rod-like structure.

[0163] For example, Fig.17 As shown, the flue gas circulation system 700 also includes a first connecting pipe 770. The first connecting pipe 770 is connected between the confluence cavity 710 and the suction pipe 720, and the suction pipe 720 is detachably connected to the first connecting pipe 770. By setting the first connecting pipe 770, on the one hand, the connection between the confluence cavity 710 and the suction pipe 720 can be achieved; on the other hand, it is convenient to disassemble, clean or replace the suction pipe 720. For example, the confluence cavity 710 is located outside the furnace body 100, the first connecting pipe 770 is penetrated through the furnace body 100, and the connection position of the suction pipe 720 and the first connecting pipe 770 can be located inside the furnace body 100, so as to facilitate the disassembly of the first connecting pipe 770 and the suction pipe 720. Of course, it can be understood that the first connecting pipe 770 can also be located outside the furnace body 100, and the suction pipe 720 passes through the furnace body 100 and is connected to the first connecting pipe 770, which can also facilitate the disassembly of the suction pipe 720. Since the suction pipe 720 is used to draw smoke through the suction holes 721, the suction holes 721 may be blocked after long-term use, affecting the uniformity of smoking. Therefore, by providing an easily disassembled suction pipe 720, maintenance efficiency can be improved.

[0164] Optionally, see Fig.17 , the flue gas circulation system 700 also includes a second connecting pipe 780. The second connecting pipe 780 is connected between the confluence cavity 710 and the blow pipe 730, and the blow pipe 730 is detachably connected to the second connecting pipe 780. By setting the second connecting pipe 780, on the one hand, the connection between the confluence cavity 710 and the blow pipe 730 can be achieved; on the other hand, it is convenient to disassemble, clean or replace the blow pipe 730. For example, the confluence cavity 710 is located outside the furnace body 100, the second connecting pipe 780 is penetrated through the furnace body 100, and the connection position of the blow pipe 730 and the second connecting pipe 780 can be located inside the furnace body 100, so as to facilitate the disassembly of the second connecting pipe 780 and the blow pipe 730. Of course, it can be understood that the second connecting pipe 780 can also be located outside the furnace body 100, and the blow pipe 730 passes through the furnace body 100 and is connected to the second connecting pipe 780, which can also facilitate the disassembly of the blow pipe 730. Since the smoke pipe is used to blow smoke through the outlet holes 732, after long-term use, the outlet holes 732 may be blocked, affecting the uniformity of smoke blowing. Therefore, by providing an easily disassembled blowing pipe 730, maintenance efficiency can be improved.

[0165] Optionally, the flow area of ​​the second connecting pipe 780 is larger than the flow area of ​​the blow pipe 730, so that when the smoke flows from the second connecting pipe 780 to the blow pipe 730, the flow area will decrease. According to the principle of conservation of energy, the smoke can be pressurized to ensure the flow rate of the smoke blown out from the smoke hole, so that the smoke can contact the product 10 to ensure the heating effect.

[0166] In some optional embodiments, the second connecting pipe 780 is L-shaped and includes a first pipe section 781 and a second pipe section 782 connected. One end of the first pipe section 781 is connected to the confluence cavity 710, and the end of the second pipe section 782 away from the first pipe section 781 is connected to the blow pipe 730, so that the blow pipe 730 and the suction pipe 720 can be arranged on both sides of the burner assembly 400 in the first direction X. The first connecting pipe 770 is linear, so that the confluence cavity 710 and the fourth power member 740 are close to the suction pipe 720, so that the suction pipe 720 can have a larger suction force to ensure that as much high-temperature flue gas as possible is sucked.

[0167] For example, Fig.16 and Fig. 20 As shown, the second pipe section 782 is located outside the furnace body 100 and extends along the second direction Y. The second pipe section 782 is provided to provide installation space for the lifting mechanism 500 used to flip the burner assembly 400. Specifically, the lifting mechanism 500 located on the same side of the furnace body 100 as the first pipe section 781 is provided on the side of the first pipe section 781 facing the furnace body 100, so as to shorten the moment when the lifting mechanism 500 drives the burner assembly 400 to lift, thereby ensuring the lifting stability.

[0168] In some optional embodiments, the amount of fluid sucked into the suction pipe 720 through the suction hole 721 per unit time is greater than or equal to the amount of fluid blown out of the blowing pipe 730 through the outlet hole 732 per unit time, so as to ensure that the suction pipe 720 sucks in enough air volume, and then has enough air pressure when blowing through the blowing pipe 730, so as to achieve better heating of the product 10 while not burning the product 10. It should be noted that the fluid in this embodiment may be flue gas.

[0169] There are many ways to control the amount of fluid sucked into the suction pipe 720 per unit time to be greater than or equal to the amount of fluid blown out per unit time through the outlet hole 732. For example, the area of ​​the suction hole 721 and the outlet hole 732 can be controlled to achieve this.

[0170] Exemplarily, 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 smoke can enter the suction pipe 720, and the outlet area of ​​the blowing pipe 730 is larger to achieve high-pressure ejection of the smoke, so that it can fully contact the product 10 and achieve the ideal effect.

[0171] Further optionally, the sum of the flow areas of the plurality of suction holes 721 can be made greater than the sum of the flow areas of the plurality of outflow holes 732 by controlling the number of suction holes 721 and outflow holes 732. Figure 5 As shown, the area of ​​the first inclined side wall 731 where the multiple outflow holes 732 are arranged is smaller than the area of ​​the second inclined side wall 722 where the multiple suction holes 721 are arranged, so that the suction holes 721 have a larger arrangement area, thereby allowing more suction holes 721 to be arranged.

[0172] In some optional embodiments, the vertical section of the suction pipe 720 is larger than that of the blowing pipe 730. In this way, the suction pipe 720 can flow more smoke than the blowing pipe 730, so as to increase the amount of smoke flowing into the converging cavity 710 through the suction pipe 720, thereby ensuring that the smoke is ejected from the blowing pipe 730 at high pressure.

[0173] Alternatively, if Fig.17 and Fig. 20 As shown, the flue gas circulation system 700 also includes a drainage pipe 750 and a drainage regulating valve 760 provided on the drainage pipe 750. Among them, one end of the drainage pipe 750 is connected to the confluence cavity 710, and the other end of the drainage pipe 750 extends to the outside of the furnace body 100. The fourth power member 740 is configured to draw air outside the furnace body 100 to the confluence cavity 710 through the drainage pipe 750, and the drainage regulating valve 760 is configured to adjust the flow area of ​​the drainage pipe 750. When the flow area of ​​the drainage pipe 750 is not 0, the air outside the furnace body 100 can enter the confluence cavity 710 through the drainage pipe 750 and mix with the flue gas in the confluence cavity 710. When the flow area of ​​the drainage pipe 750 is 0, the air outside the furnace body 100 cannot enter the confluence cavity 710 through the drainage pipe 750.

[0174] During the operation of the drying furnace, when encountering an abnormal production process or shearing and coiling, the running speed of the product 10 in the furnace body 100 will drop to 0. In order to prevent the product 10 from overburning, the heating power of the drying furnace needs to be reduced as quickly as possible. However, when the product 10 returns to normal speed, the heating power needs to be restored to a normal value as quickly as possible. However, the furnace body 100 is usually composed of an external steel structure shell and internal insulation materials. During the cooling and heating process of the furnace body 100, the heat storage of the insulation material is a serious restrictive factor, which can be understood as a kind of "thermal inertia", that is, the extension of the cooling process time.

[0175] In the present embodiment, by providing a drainage pipe 750, when the furnace body 100 needs to be cooled down quickly or the moisture content in the atmosphere in the furnace body 100 needs to be reduced quickly, the drainage regulating valve 760 is controlled to open a corresponding opening, and air is sucked in from outside the furnace body 100 through the drainage pipe 750 through the suction force of the fourth power component 740 (for example, a circulating fan), and is sent into the furnace body 100 through the blow pipe 730, so that the temperature in the furnace body 100 can be reduced quickly, thereby shortening the time of the cooling process.

[0176] Furthermore, the flue gas in the furnace body 100 is discharged through the flue gas exhaust system 600 in this embodiment. If no external air is introduced, the flue gas discharged through the flue gas exhaust system 600 is only the flue gas generated by the combustion of the burner assembly 400, which reduces the power of the burner assembly 400. When the flue gas volume is reduced, the flue gas volume discharged from the furnace body 100 to the outside will also be reduced, which is not conducive to the discharge of water vapor in the furnace body 100. In this embodiment, by providing a drainage pipe 750, the cold air outside the furnace body 100 can be introduced into the furnace body 100, so that there is not only flue gas but also introduced air in the furnace body 100. At this time, the exhaust volume of the flue gas exhaust system 600 is the flue gas volume plus the air volume, and the exhaust volume can be increased. The larger the exhaust volume, the more water vapor in the furnace body 100 can be taken away, thereby reducing the humidity in the furnace body 100.

[0177] It should be noted that when it is necessary to introduce air from outside the furnace body 100 through the drainage pipe 750, it is necessary to control the power of the fourth power component 740 (for example, a circulating fan) to increase. If the power of the fourth power component 740 remains unchanged, the addition of external air will reduce the amount of fluid sucked through the suction pipe 720, and the purpose of not burning the product 10 cannot be achieved.

[0178] The flue gas circulation system 700 provided in this embodiment is provided with a suction pipe 720 and a blow pipe 730 installed on both sides of the furnace body 100. The suction force generated by the fourth power member 740 extracts the high-temperature flue gas through the suction pipe 720 to avoid direct contact with the surface of the product 10. The extracted high-temperature flue gas enters the confluence cavity 710 from the suction pipe 720, and is sent back into the furnace through the blow pipe 730 by the action of the fourth power member 740. The circulation of flue gas is realized to avoid energy waste.

[0179] The steps of processing oriented silicon steel in the drying furnace provided in this embodiment are as follows:

[0180] The steel strip passes through the coating machine, and the coating is applied on the upper and lower surfaces of the steel strip → the product 10 enters the drying furnace → the steel strip meets the oncoming high-temperature flue gas, and the steel strip is heated → the steel strip continues to move forward, passes through the burner assembly 400 installed above and below the furnace body 100, and the infrared waves radiated by the porous medium burner heat the water in the coating → the water in the coating is rapidly heated and continuously evaporates into the atmosphere in the furnace → the flue gas burned by the porous medium burner and the water vapor entering the atmosphere in the furnace are extracted and ejected by the flue gas exhaust system 600 → at the same time, due to the operation of the flue gas circulation system 700, the burning flue gas passes quickly on the upper and lower surfaces of the steel strip, realizing the controllable temperature increase of the steel strip → after being heated in the drying furnace, the moisture in the coating is removed to a certain extent, and the moisture content of the coating reaches the target value → the steel strip completes the drying and heating process and enters the next process.

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

[0182] 1. A quick cooling assembly 300 is installed in the upper and lower directions of the product 10 (such as a steel plate and a steel strip), that is, at the top and bottom of the furnace body 100. The power body 312 (such as a motor) of the quick cooling assembly 300 located outside the furnace body 100 drives the disturbance structure 311 (such as a rotating blade) in the furnace body 100. The strong stirring of the disturbance structure 311 in the furnace body 100 realizes the rapid flow of the flue gas in the furnace, and the cold air is quickly dispersed by the disturbance structure 311, which further shortens the time for the furnace temperature to be reduced, and at the same time realizes the uniformity of the temperature in the furnace, avoiding the high-temperature dead zone; the second power part 310 cooperates with the second cooling pipeline 320 to input cold air into the furnace body 100. The second power part 310 has a frequency conversion function. At the same time, an adjusting valve is installed on the second cooling pipeline 320 to realize the controllable introduction of cold air, which can realize a small temperature reduction in the furnace body 100;

[0183] 2. A gas circulation system is provided for the heating method of the porous medium burner. The gas circulation system has the function of "internal circulation of flue gas in the furnace + introduction of external cold air". Since each porous medium burner of the burner assembly 400 is also in the minimum power state when the drying furnace is in the cooling state, the air flow disturbance required for removing moisture from the coating on the surface of the steel plate becomes smaller. In this embodiment, a drainage regulating valve 760 is provided on the drainage pipe 750, and the external cold air is sent into the furnace body 100 by opening the drainage regulating valve 760, so as to further realize the rapid reduction of the furnace temperature; the high-temperature flue gas is extracted through the suction pipe 720, and the extracted flue gas is sent back to the furnace body 100 through the blow pipe 730. Both the suction pipe 720 and the blow pipe 730 extend in the width direction of the steel plate and steel strip, and the extraction of flue gas is carried out in the width direction of the steel plate and steel strip. At the same time, the introduction of flue gas is also in the width direction of the steel plate and steel strip. On the one hand, the uniformity of moisture removal in the width direction of the steel plate and steel strip is considered, and on the other hand, the strong flow of the flue gas in the furnace body 100 is considered;

[0184] 3. In this embodiment, for the porous medium burner, the internal circulation of the flue gas only accelerates the flow of the flue gas in the furnace, but the continuous flue gas generated by the combustion of the gas needs to be discharged out of the furnace in time. Once the external discharge is not smooth or unstable, it will have a serious impact on the drying of the coating. In this embodiment, a number of smoke exhaust ports are opened on the furnace body 100. The smoke exhaust port and the third power part 630 of the smoke exhaust system 600 are not directly connected by pipeline, but the smoke in the furnace is discharged by "injection" smoke exhaust. This "injection" smoke exhaust design, on the one hand, realizes the smooth discharge of smoke; on the other hand, it cleverly uses the injection structure to realize the mixing of external cold air, and through the mixing of cold air, the temperature of the smoke entering the third power part 630 is reduced, thereby reducing the high temperature resistance requirements of the third power part 630; the injection smoke exhaust method is also crucial to the stability of the smoke pressure in the furnace body 100. Specifically, the air extraction volume Q1 of the third power component 630 is a constant value, the outside cold air mixing volume Q2, and the smoke extraction volume Q3 in the furnace, and the three satisfy the following relationship:

[0185] Q1=Q2+Q3

[0186] Among them, the power of the drying furnace mainly depends on the production capacity of the steel plates and steel strips. Once the production capacity of the steel plates and steel strips is determined, it means that the maximum power of the drying furnace is determined. Under the maximum power state, the amount of flue gas Q3 generated by the combustion of gas in the burner assembly 400 is determined. Then on this basis, the exhaust volume Q1 of the third power component 630 is basically determined. Compared with the maximum power of the drying furnace, when the power of the porous medium burner is reduced, the amount of flue gas Q3 in the furnace is reduced accordingly, and the amount of external cold air doping Q1 is increased accordingly. Therefore, no matter how the power of the drying furnace (that is, the power of the burner assembly 400) changes, the constant power operation of the third power component 630 is used to achieve stable flue gas pressure inside the furnace body 100.

[0187] Fourth, in this embodiment, the burner assembly 400 adopts a roll-up structure, but this structure is for the convenience of burner maintenance. Rapid cooling in the furnace body 100 does not require flipping the burner assembly 400;

[0188] 5. When the drying furnace is in normal production (including the stage when the speed of the steel plate and steel strip is 0), the burner assembly 400 is in a closed state. When the speed of the steel plate drops to 0, since the power of the burner assembly 400 is reduced at this time, the cooling system composed of the first cooling pipeline 210, the cooling regulating valve 220 and the first power member 230 intervenes to control the furnace temperature within a certain temperature range while maintaining the minimum power of the infrared radiation state.

[0189] In the second aspect, the present embodiment provides a drying furnace operation control method, which is used to control the drying furnace in the first aspect and can achieve rapid cooling of the drying furnace. The drying furnace operation control method provided in this embodiment has the same beneficial effects as the drying furnace in the first aspect, and will not be described in detail here.

[0190] Among them, the operation control method of the drying furnace includes a normal operation step.

[0191] Specifically, the normal operation steps include:

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

[0193] In the normal operation step, the temperature in the furnace body 100 can meet the heating and drying of the product 10, so there is no need to introduce cold air into the furnace body 100 through the first cooling pipeline 210. At this time, the opening of the cooling regulating valve 220 is controlled to be 0 to ensure that the temperature in the furnace body 100 is within a certain range. Among them, the opening of the cooling regulating valve 220 is 0, which means that the cooling regulating valve 220 is in a closed state. The opening of the cooling regulating valve 220 is greater than 0, which means that the cooling regulating valve 220 is in an open state.

[0194] Exemplarily, the operation control method of the drying furnace also includes a rapid temperature reduction step.

[0195] Specifically, the rapid cooling step includes:

[0196] S101, determining whether the moving speed of the product in the furnace body 100 is less than or equal to the speed setting value; if so, executing step S102, if not, executing step S103;

[0197] S102, adjusting the opening of the temperature-lowering regulating valve 220 to be greater than 0, and controlling the first power member 230 to start, so that the first power member 230 passes fluid into the furnace body 100 through the first temperature-lowering pipeline 210 and the first temperature-lowering interface 110, so as to reduce the temperature in the furnace body 100;

[0198] S103, adjusting the opening of the cooling regulating valve 220 to 0.

[0199] When the drying furnace encounters abnormal production or shearing and coil changing, the running speed of the product in the furnace body 100 will drop to 0. Therefore, it is necessary to quickly lower the temperature in the furnace body 100. At this time, a rapid cooling step can be performed to allow the first power part 230 to pass a large amount of cold air into the furnace body 100 through the first cooling pipeline 210 to quickly reduce the temperature in the furnace body 100.

[0200] In step S101, the speed setting value may be a manually set value, for example, the speed setting value may be 5 m / s, 2 m / s, 0, etc., which is not limited in this embodiment.

[0201] In one embodiment, the drying oven includes a controller, which includes 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 member 230. The cooling regulating valve 220 can be a solenoid valve. The controller controls the opening of the cooling regulating valve 220 and controls the opening and closing of the first power member 230. A displacement detection member for detecting the running speed of the product can be provided in the furnace body 100. The displacement detection sends the detected displacement data to the controller, and the controller calculates and analyzes and determines whether the running speed of the product in the furnace body 100 is less than or equal to the speed setting value.

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

[0203] Specifically, the rapid cooling control step includes:

[0204] Control the second cooling pipeline 320 to be in a conducting state, so that the fluid outside the furnace body 100 can enter the furnace body 100 through the second cooling pipeline 320;

[0205] The second power member 310 is controlled to start, so that the disturbance structure 311 of the second power member 310 located in the furnace body 100 disturbs the fluid input into the furnace body 100 through the second cooling pipeline 320 .

[0206] It should be noted that when the required temperature reduction range in the furnace body 100 is large, a large amount of cold air with a high speed can be introduced into the furnace body 100 through the cooperation of the first power member 230 and the first cooling pipeline 210. For the demand of a smaller temperature reduction range, it can be achieved through the fast cooling component 300. Of course, it is understandable that when the required temperature reduction range in the furnace body 100 is large, cold air can also be input into the furnace body 100 through the first cooling pipeline 210, and cold air can be input into the furnace body 100 through the second cooling pipeline 320 at the same time, and with the help of the stirring function of the second power member 310, the cold air can be quickly diffused in the furnace body 100, further improving the temperature reduction rate.

[0207] Exemplarily, when the drying furnace includes a smoke exhaust system 600, the operation control method of the drying furnace further includes a smoke exhaust control step;

[0208] Specifically, the smoke exhaust control steps include:

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

[0210] The third power component 630 is controlled to operate at a constant power.

[0211] In the vertical direction of the running direction of the product 10, the furnace body 100 is provided with one or more smoke exhaust ports to match the arrangement characteristics of the burner assembly 400. A smoke exhaust regulating valve 640 is provided on the branch smoke exhaust pipe assembly 620 connected to each smoke exhaust port. By adjusting the opening of the smoke exhaust regulating valve 640, the smoke in the furnace body 100 can be controlled to be discharged in the running direction of the product 10 in a controllable manner. The controllable discharge of smoke is consistent with the law of removing moisture from the coating of the product 10. For example, when the product 10 just enters the furnace, there is a lot of moisture and the water content of the smoke is high. Therefore, the flow rate of the smoke exhaust port at the entrance of the furnace body 100 is large, and the moisture discharge should be accelerated to reduce condensation. The opening of the smoke exhaust regulating valve 640 at this location needs to be controlled to be large; the flow rate of the smoke exhaust port at the outlet of the furnace body 100 is small, and the opening of the smoke exhaust regulating valve 640 at this location needs to be controlled to be small.

[0212] When there is one smoke exhaust port, the smoke exhaust port is located above the inlet or outlet of the furnace body 100 .

[0213] Optionally, when the drying furnace includes a flue gas circulation system 700, the operation control method of the drying furnace further includes a flue gas circulation control step;

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

[0215] The fourth power member 740 is controlled to start, and the smoke in the furnace body 100 is sucked into the converging cavity 710 through the suction pipe 720, and the smoke in the converging cavity 710 is pressed into the furnace body 100 through the blowing pipe 730 to realize smoke circulation.

[0216] Exemplarily, when the smoke circulation system 700 includes a drainage pipe 750 and a control valve disposed on the drainage pipe 750, the smoke circulation control step further includes:

[0217] S201, determining whether the humidity in the furnace body 100 is greater than the humidity setting value, if so, executing step 202; if not, executing step S203;

[0218] S202, adjusting the opening of the control valve on the drainage pipe 750 and increasing the power of the fourth power member 740, so that the fluid is introduced into the converging cavity 710 through the drainage pipe 750, and the smoke in the converging cavity 710 is pressed into the furnace body 100 through the blowing pipe 730;

[0219] S203 adjusts the opening of the control valve on the drainage pipe 750 to 0.

[0220] Optionally, a humidity detector may be provided in the furnace body 100 , and the humidity detector sends the detected humidity to the controller, and the controller determines the opening of the control valve on the drainage pipe 750 according to the humidity.

[0221] In this embodiment, when the humidity in the furnace body 100 is relatively high, the drainage pipe 750 is provided to introduce cold air from the outside of the furnace body 100 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 exhaust system 600 is the flue gas volume plus the air volume, and the exhaust volume can be increased. The larger the exhaust volume, the more water vapor in the furnace body 100 can be taken away, thereby reducing the humidity in 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 is mixed with the high-temperature flue gas, which reduces the temperature of the flue gas contacting the surface of the product 10 while avoiding the quality problems of the product 10 caused by the great temperature change.

[0222] In step S201 , the humidity setting value may be a manually set value, which is not limited in this embodiment.

[0223] It should be noted that if the purpose of opening the drainage pipe 750 is to reduce the humidity in the furnace body 100 , when the humidity in the furnace body 100 is reduced to a desired value, the control valve on the drainage pipe 750 can be closed.

[0224] In summary, the drying furnace provided in this embodiment provides three ways of introducing cold air. The first way is to introduce it through the first cooling pipeline 210, the second way is to introduce it through the second cooling pipeline 320, and the third way is to introduce it through the drainage pipe 750. The three ways can be used in combination with each other according to actual needs, and this embodiment does not limit this.

[0225] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drying furnace, characterized in that: include: A furnace body (100), wherein the furnace body (100) is provided with a first temperature-lowering interface (110); a first cooling pipeline (210), one end of the first cooling pipeline (210) being connected to the first cooling interface (110) and communicating with the interior of the furnace body (100) through the first cooling interface (110); A temperature-lowering regulating valve (220), provided on the first temperature-lowering pipeline (210), and used for adjusting a flow area of ​​the first temperature-lowering pipeline (210); A first power component (230), the other end of the first cooling pipeline (210) is connected to the first power component (230), and the first power component (230) is used to input fluid into the furnace body (100) through the first cooling pipeline (210).

2. The drying oven according to claim 1, characterized in that: One or more first cooling pipelines (210) are provided, each of the first cooling pipelines (210) corresponds to one of the first cooling interfaces (110) on the furnace body (100), and each of the first cooling pipelines (210) is provided with a cooling regulating valve (220); When a plurality of the first cooling pipelines (210) are provided, the plurality of the first cooling pipelines (210) are connected to the same first power component (230).

3. The drying oven according to claim 1, characterized in that: The drying furnace further comprises a quick cooling component (300), wherein the quick cooling component (300) comprises a second power component (310) and a second cooling pipeline (320), wherein the second power component (310) is installed on the furnace body (100), and the second power component (310) has a disturbance structure (311) located inside the furnace body (100), one end of the second cooling pipeline (320) is located outside the furnace body (100), and the other end is located inside the furnace body (100), and is used for selectively inputting fluid into the furnace body (100), and the disturbance structure (311) is used for disturbing the fluid input into the furnace body (100) through the second cooling pipeline (320).

4. The drying oven according to claim 3, characterized in that: A plurality of the quick cooling components (300) are provided at the top and the bottom of the furnace body (100), and the plurality of the quick cooling components (300) at the top and the bottom of the furnace body (100) are arranged at intervals along the length direction of the furnace body (100).

5. The drying oven according to claim 4, characterized in that: The drying furnace further comprises a burner assembly (400), and a plurality of the burner assemblies (400) are disposed on the top and the bottom of the furnace body (100); The quick cooling assembly (300) and the burner assembly (400) at the top of the furnace body (100) are alternately arranged along the length direction of the furnace body (100); and the quick cooling assembly (300) and the burner assembly (400) at the bottom of the furnace body (100) are alternately arranged along the length direction of the furnace body (100).

6. The drying oven according to claim 1, characterized in that: The drying furnace further comprises a smoke exhaust system (600), wherein the smoke exhaust system (600) comprises a main smoke exhaust pipe (610), a branch smoke exhaust pipe assembly (620) and a third power member (630); The branch smoke exhaust pipe assembly (620) comprises a first smoke exhaust branch pipe (621) and a second smoke exhaust branch pipe (622); a smoke inlet of the first smoke exhaust branch pipe (621) is connected to the furnace body (100); a smoke outlet of the first smoke exhaust branch pipe (621) is spaced apart from a smoke inlet of the second smoke exhaust branch pipe (622); a smoke outlet of the second smoke exhaust branch pipe (622) is connected to the main smoke exhaust pipe (610); an inlet of the third power component (630) is connected to the main smoke exhaust pipe (610), and the third power component (630) is used to draw smoke from the main smoke exhaust pipe (610).

7. The drying oven according to claim 6, characterized in that: A plurality of branch smoke exhaust pipe assemblies (620) are provided, each of the branch smoke exhaust pipe assemblies (620) is provided with a smoke exhaust regulating valve (640), and the smoke exhaust regulating valve (640) is used to adjust the flow area of ​​the branch smoke exhaust pipe assembly (620). The plurality of branch smoke exhaust pipe assemblies (620) are arranged at intervals along the length direction of the furnace body (100).

8. The drying oven according to claim 1, characterized in that: The drying furnace further comprises a flue gas circulation system (700), wherein the flue gas circulation system (700) comprises a converging cavity (710), a suction pipe (720), a blowing pipe (730) and a fourth power member (740); A confluence cavity (710) is installed on the furnace body (100); a suction pipe (720) is connected to the confluence cavity (710), and the suction pipe (720) is provided with a plurality of suction holes (721), and the suction pipe (720) is arranged in the furnace body (100); the blowing pipe (730) is arranged in the furnace body (100), and the blowing pipe (730) is connected to the confluence cavity (710); the fourth power member (740) is used to draw the smoke in the furnace body (100) into the confluence cavity (710) through the suction pipe (720), and to pressurize the smoke in the confluence cavity (710) into the furnace body (100) through the blowing pipe (730).

9. The drying oven according to claim 8, characterized in that: The flue gas circulation system (700) also includes a drainage pipe (750) and a drainage regulating valve (760) arranged on the drainage pipe (750), one end of the drainage pipe (750) is connected to the confluence cavity (710), and the other end of the drainage pipe (750) extends to the outside of the furnace body (100), the fourth power member (740) is configured to draw air from the outside of the furnace body (100) to the confluence cavity (710) through the drainage pipe (750), and the drainage regulating valve (760) is configured to control the flow area of ​​the drainage pipe (750).

10. A drying furnace operation control method, applied to the drying furnace according to any one of claims 1 to 9, characterized in that: The operation control method of the drying furnace includes normal operation steps; The normal operation steps include: Adjusting the opening of the temperature-lowering regulating valve (220) to 0, and controlling the first power member (230) to be in a closed state; The operation control method of the drying furnace also includes a rapid temperature reduction step; The rapid cooling steps include: S101, determining whether the moving speed of the product in the furnace body (100) is less than or equal to the speed setting value; if so, executing step S102; if not, executing step S103; S102, adjusting the opening of the temperature-lowering regulating valve (220) to be greater than 0, and controlling the first power member (230) to start, so that the first power member (230) passes a fluid into the furnace body (100) through the first temperature-lowering pipeline (210) and the first temperature-lowering interface (110), so as to reduce the temperature inside the furnace body (100); S103, adjusting the opening of the temperature-lowering regulating valve (220) to 0.

11. The operation control method of the drying furnace according to claim 10, characterized in that: The drying furnace further comprises a quick cooling component (300), and the operation control method of the drying furnace further comprises a quick cooling control step; The rapid cooling control steps include: Controlling the second cooling pipeline (320) to be in a conducting state so that the fluid outside the furnace body (100) can enter the furnace body (100) through the second cooling pipeline (320); The second power member (310) is controlled to start, so that the disturbance structure (311) of the second power member (310) located in the furnace body (100) disturbs the fluid input into the furnace body (100) through the second cooling pipeline (320).

12. The drying furnace operation control method according to claim 10, characterized in that: The drying furnace further comprises a smoke exhaust system (600), and the operation control method of the drying furnace further comprises a smoke exhaust control step; Smoke control steps include: Adjusting the opening of the smoke exhaust regulating valve (640) on the branch smoke exhaust pipe assembly (620) close to the inlet of the furnace body (100) to be greater than the opening of the smoke exhaust regulating valve (640) on the branch smoke exhaust pipe assembly (620) close to the outlet of the furnace body (100); The third power element (630) is controlled to operate at a constant power.

13. The drying furnace operation control method according to claim 12, characterized in that: The drying furnace further comprises a flue gas circulation system (700), and the operation control method of the drying furnace further comprises a flue gas circulation control step; The steps of flue gas circulation control include: The fourth power element (740) is controlled to start, so that smoke in the furnace body (100) is sucked into the converging cavity (710) through the suction pipe (720), and the smoke in the converging cavity (710) is pressed into the furnace body (100) through the blowing pipe (730), thereby realizing smoke circulation; The smoke circulation system (700) comprises a drainage pipe (750) and a control valve arranged on the drainage pipe (750), and the smoke circulation control step further comprises: S201, determining whether the humidity in the furnace body (100) is greater than the humidity setting value, if so, executing step 202; if not, executing step S203; S202, adjusting the opening of the control valve on the drainage pipe (750) to be greater than 0, and increasing the power of the fourth power member (740), so that the fluid is introduced into the confluence cavity (710) through the drainage pipe (750), and the flue gas in the confluence cavity (710), i.e. the fluid introduced, is pressed into the furnace body (100) through the blowing pipe (730); S203, adjusting the opening of the control valve on the drainage pipe (750) to 0.

Images