Vertical continuous oven and drying method

Abstract

The application discloses a vertical continuous oven and a drying method, and belongs to the field of drying equipment. The oven comprises a box body, an inlet and an outlet are arranged on the two side walls of the box body, a drying cavity, a transition cavity and a cooling cavity are further arranged in the box body, the drying cavity and the cooling cavity are arranged on the two sides in the box body respectively, the drying cavity and the cooling cavity are communicated by the transition cavity, materials are dried in the drying cavity, enter the cooling cavity through the transition cavity, the heat in the drying cavity can be recycled, the heat is not easy to leak in the conveying process, the waste heat on the materials can be recycled, and the heat loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drying equipment, in particular to a vertical continuous oven and drying method. BACKGROUND

[0002] Sintered products need to be dried before forming to remove excess moisture and preliminary shaping. The existing product drying line has two forms. One is an intermittent oven, which works by placing the products to be dried evenly in the oven, then gradually blowing dry hot air, gradually increasing the dry hot air temperature to the target temperature according to the process temperature curve, and keeping the temperature stable for a certain period of time to evaporate the moisture in the product. The wet hot air is slowly discharged synchronously during heating, so that the product slowly cools down, and the workpiece is taken out after reaching the set temperature. The other is a horizontally arranged drying kiln. The product enters from the front end of the drying kiln, then moves according to the drying temperature curve and contacts with dry hot air, and the moisture in the product is evaporated. After keeping the temperature constant in the kiln for a period of time, it is gradually cooled until it is removed from the end of the drying kiln. The energy waste is huge, and each time the room temperature air is heated to the target temperature and then discharged. Both of the above drying methods have the disadvantages of large horizontal layout area, short contact time of drying air flow with products, too many air flow circulation times, and large energy consumption. There is a need for a drying oven with small floor area, high drying efficiency and low energy consumption.

[0003] The patent application with the existing publication number CN105823318A discloses a vertical food drying device, which is characterized in that it comprises an oven arranged vertically, the middle part of the inner cavity of the oven is provided with a partition plate which divides the inner cavity into an upper section and a lower section, the three edges of the partition plate are fixedly and sealingly matched with the inner side walls of the oven, the other edge of the partition plate has a spacing from the inner side wall of the oven, and the corresponding inner side wall of the oven is provided with a sliding plate arranged obliquely downward, the edge of the sliding plate with a lower height extends to the lower part of the partition plate, and the edge of the partition plate and the sliding plate has a curtain. SUMMARY

[0004] One of the purposes of the present application is to provide a vertical continuous oven, which solves the problem of low heat utilization rate and high energy consumption of the existing drying machine when drying materials.

[0005] To achieve the above-mentioned purposes of the application, the technical solutions adopted by the present application are as follows:

[0006] A vertical continuous oven comprises a box body, an inlet and an outlet are respectively arranged on the two side walls of the box body, a drying cavity, a transition cavity and a cooling cavity are further arranged in the box body, the drying cavity and the cooling cavity are respectively arranged on the two sides of the box body, the drying cavity and the cooling cavity are communicated by the transition cavity, the material is dried in the drying cavity and then enters the cooling cavity through the transition cavity, the heat in the drying cavity can be recycled, the heat is not easy to leak during the conveying process and the waste heat on the material can be recovered, and the heat loss is reduced.

[0007] Further, a heat supply unit is arranged on the outer wall of the box body, and the heat supply unit is communicated with the drying cavity and is used for supplying heat to the drying cavity.

[0008] Further, a plurality of the heat supply units are arranged on the outer wall of the cabinet in the vertical direction, and the plurality of the heat supply units are respectively communicated with the drying cavity for segmentally controlling the drying temperature of the materials along the conveying direction.

[0009] Further, the heat supply unit comprises a wind distribution box, a heating device and a heat supply fan, the wind distribution box is arranged on the side wall of the drying cavity, one end of the heating device is communicated with the wind distribution box, and the other end of the heating device is communicated with the heat supply fan for providing hot air to the drying cavity for drying.

[0010] Further, the heat supply unit further comprises a first valve and a second valve, the first valve is arranged between the heating device and the heat supply fan, and the second valve is arranged between the heating device and the wind distribution box for accurately controlling the heat supply.

[0011] Further, a cooling fan is further included, the cooling fan is communicated with the cooling cavity for cooling the materials in the cooling cabinet.

[0012] Further, a circulating fan, a return air pipeline, a third valve and a fourth valve are further included, the air inlet end of the circulating fan is communicated with the cooling cavity, the air outlet end of the circulating fan is communicated with the air inlet end of the heat supply fan, one end of the return air pipeline is communicated with the drying cavity, the other end of the return air pipeline is connected with the air inlet end of the heat supply fan, the third valve is arranged between the circulating fan and the air inlet end of the heat supply fan, and the fourth valve is arranged on the return air pipeline.

[0013] As preferred, the drying cavity and the cooling cavity are arranged in parallel along the vertical direction of the cabinet, and the transition cavity is arranged at the top of the drying cavity and the cooling cavity.

[0014] As more preferably, the conveying device for circulating the material into the box is further included, which comprises a frame, a first conveying belt, a first vertical conveying mechanism, a horizontal moving mechanism, a second vertical conveying mechanism and a second conveying belt, the first conveying belt is arranged to pass through the inlet into the drying cavity, the first vertical conveying mechanism is arranged in the vertical direction of the box in the drying cavity, one end of the first vertical conveying mechanism is connected with one end of the first conveying belt, one end of the horizontal moving mechanism is connected with the other end of the first vertical conveying mechanism, the other end of the horizontal moving mechanism is connected with one end of the second vertical conveying mechanism, the second vertical conveying mechanism is arranged in the vertical direction of the box in the cooling cavity, the second conveying belt is arranged to pass through the outlet into the cooling cavity, the other end of the second vertical conveying mechanism is connected with one end of the second conveying belt, for automatically and continuously transporting the material into the box.

[0015] The second object of the present application is to provide a drying method, which solves the problems of low drying efficiency and large energy consumption of the prior art.

[0016] To achieve the above-mentioned objects, the technical solutions adopted by the present application are as follows:

[0017] A drying method is realized by the vertical continuous drying oven, comprising the following steps:

[0018] S1, drying: the material to be dried is sequentially entered into the drying cavity from the inlet of the box, and hot air is released in the drying cavity to gradually dry the material;

[0019] S2, cooling: the dried material is sequentially entered into the cooling cavity from the drying cavity through the transition cavity, cold air is released in the cooling cavity to cool the material, and the cooled material is removed from the outlet of the box;

[0020] S3, heat circulation: the hot air in the drying cavity is circulated back to the drying cavity after drying the material, and after being heated again, it enters the drying cavity to dry the material, and the cold air in the cooling cavity is heated by the waste heat of the material and flows into the drying cavity for use, the heated hot air enters the drying cavity to heat and dry the material, the waste heat of the drying cavity and the waste heat carried by the material can be recycled, the heat utilization rate is improved, and the energy consumption is reduced.

[0021] The present application has the following advantages:

[0022] (1) The vertical continuous oven is provided with a drying cavity, a transition cavity and a cooling cavity in the box body, the transition cavity is used for connecting the drying cavity and the cooling cavity, the material can be connected and heated for drying, the vertical structure has small land occupation, is convenient to arrange, the material can continuously enter the box body for drying, the efficiency of drying the material is high, the full-automatic operation requires low labor, and the use cost is saved.

[0023] (2) The vertical continuous oven is provided with a heating fan, a cooling fan and a circulating fan, the heating fan is used for controlling the heat supply to the drying cavity, the waste heat of the cooling cavity is recovered by the circulating fan, the heat of the drying cavity is recycled, the waste heat of the cooling cavity is used for preheating the cold air, the purpose of recycling the heat is achieved, and the energy consumption of the drying oven is reduced.

[0024] (3) The material drying cavity, the transition cavity and the cooling cavity of the drying method are used for drying and cooling, the waste heat in the drying cavity is recycled, the cooling air in the cooling cavity is preheated by the waste heat of the material, the recycling rate of the heat is improved under the condition of ensuring the drying efficiency, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The vertical continuous oven provided by the application is provided with an axial measurement Figure 1 ;

[0026] Figure 2 The vertical continuous oven provided by the application is provided with an axial measurement Figure 2 ;

[0027] Figure 3 The vertical continuous oven provided by the application is provided with a sectional structure view.

[0028] Figure 4 The heating device provided by the application is provided with a component structure view.

[0029] Figure 5 The conveying device provided by the application is provided with a component structure view.

[0030] REFERENCE SIGNS:

[0031] 1. Housing; 11. Drying chamber; 12. Transition chamber; 13. Cooling chamber; 14. Inlet; 15. Outlet; 2. Tray; 3. Heating unit; 31. Air distribution box; 32. Heating device; 33. First valve; 34. Second valve; 35. Air outlet; 4. Heating fan; 5. Circulating fan; 51. Third valve; 52. Return air duct; 53. Fourth valve; 54. Heat exhaust valve; 6. Cooling fan; 7. Insulation layer; 8. Partition; 9. Conveying device; 91. First conveyor belt; 92. First vertical conveying mechanism; 921. Hook; 93. Frame; 94. Lateral movement mechanism; 941. Guide rail; 942. Trolley; 943. Hook; 95. Second vertical conveying mechanism; 96. Second conveyor belt; 97. Second robotic arm; 98. First robotic arm. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figures 1-5 As shown, this embodiment discloses a vertical continuous drying oven, including a box body 1. An inlet 14 and an outlet 15 are respectively provided on the two side walls of the box body 1. The box body 1 also includes a drying chamber 11, a transition chamber 12, and a cooling chamber 13. The drying chamber 11 and the cooling chamber 13 are respectively located on both sides of the box body 1 and are connected by the transition chamber 12. Hot air is used in the drying chamber 11 to heat and dry the material, while cold air is used in the cooling chamber 13 to cool the material. The hot air in the drying chamber 11 can be recycled to reduce heat loss, while the cold air in the cooling chamber 13 absorbs the heat emitted by the material and preheats it before being used for heating in the drying chamber 11, thus improving heat utilization. A partition plate 8 is provided between the drying chamber 11 and the cooling chamber 13, and a heat insulation layer 7 is provided between the transition chamber 12 and the drying chamber 11 and the cooling chamber 13 to reduce heat dissipation and improve the heat utilization rate within the drying chamber 11.

[0035] Furthermore, it also includes a heating unit 3, which is installed on the outer wall of the housing 1 and is connected to the drying chamber 11. The heating unit 3 is used to directly heat the air and inject it into the drying chamber 11 for dehumidification of the material.

[0036] Further, the plurality of heat supply units 3 are arranged on the outer wall of the cabinet 1 in the vertical direction, the plurality of heat supply units 3 are respectively communicated with the drying cavities 11, the plurality of heat supply units 3 are arranged along the moving direction of the materials, the temperature for heating and drying the materials in different stages can be controlled, the precise temperature control is realized, and the quality and efficiency of the dried materials are improved.

[0037] Further, the heat supply unit 3 comprises a wind distribution box 31, a heating device 32 and a heat supply fan 4, the wind distribution box 31 is arranged on the side wall of the drying cavity 11, one end of the heating device 32 is communicated with the wind distribution box 31, the other end of the heating device 32 is communicated with the heat supply fan 4, the wind distribution box 31 is arranged on the two side walls of the drying cavity 11, a plurality of air outlets 35 are arranged on the wind distribution box 31, the air outlets 35 are arranged towards the horizontal direction, the air heated by the heating device 32 is blown into the drying cavity 11 along the horizontal direction through the air outlets 35, the materials are heated at the same time, and are moved downward along the vertical direction under the action of the suction force of the heat supply fan 4, the hot air heated by the materials is reabsorbed by the heat supply fan 4 and heated by the heating device 32 again, so that the hot air can be repeatedly used, the circulation path of the hot air is short, and the utilization efficiency of the heat is high.

[0038] Preferably, the heating device 32 adopts an electric heating wire, the electric heating wire has the advantages of fast heating, accurate temperature control and no by-products in the heated air.

[0039] More preferably, a dryer is arranged on the air inlet end of the heat supply fan 4, which is used for purifying and dehumidifying the recycled hot air.

[0040] Further, the heat supply unit 3 further comprises a first valve 33 and a second valve 34, the first valve 33 is arranged between the heating device 32 and the heat supply fan 4, the second valve 34 is arranged between the heating device 32 and the wind distribution box 31, the first valve 33 is used for controlling the air input to the heating device 32, and the second valve 34 is used for controlling the air input to the drying cavity 11, so as to control the temperature at different positions of the drying cavity 11.

[0041] Further, a cooling fan 6 is further included, the cooling fan 6 is communicated with the cooling cavity 13, and the cooling fan 6 is used for inputting cold air into the cooling cavity 13 to cool the materials.

[0042] Further, a circulating fan 5, a return air pipe 52, a third valve 51 and a fourth valve 53 are further included, the air inlet end of the circulating fan 5 is communicated with the cooling cavity 13, the air outlet end of the circulating fan 5 is communicated with the air inlet end of the heating fan 4, one end of the return air pipe 52 is communicated with the drying cavity 11, the other end of the return air pipe 52 is communicated with the air inlet end of the heating fan 4, the third valve 51 is arranged between the circulating fan 5 and the air inlet end of the heating fan 4, the fourth valve 53 is arranged on the return air pipe 52, the circulating fan 5 inputs the preheated air in the cooling cavity 13 to the heating fan 4 through the return air pipe 52, so as to recover the waste heat emitted by the materials, and reduce the heat consumption to a greater extent, the fourth valve 53 is used for controlling the opening and closing of the return air pipe 52, so as to prevent cold air from entering the heating fan 4.

[0043] More preferably, a heat exhaust valve 54 is arranged on the air outlet end of the heating fan 4, the heat exhaust valve 54 is communicated with the heating unit 3, the recovered hot air and the heat generated by the heating device 32 can be exhausted outward, so as to prevent the drying cavity 11 from being overheated and quickly exhaust heat.

[0044] More preferably, the drying cavity 11 and the cooling cavity 13 are arranged in parallel along the vertical direction of the box body 1, the transition cavity 12 is arranged on the top of the drying cavity 11 and the cooling cavity 13, two openings are arranged on the transition cavity 12, the two openings are used for respectively communicating the drying cavity 11 and the cooling cavity 13, movable doors are arranged on the openings, the movable doors are closed when the drying cavity 11 or the cooling cavity 13 is used, the movable doors are opened when the drying or cooling is completed, so as to pass the materials, and the movable doors can prevent heat loss.

[0045] More preferably, referring to Figure 5The conveying device 9 is used to cyclically convey materials into the box 1, and comprises a frame 93, a first conveying belt 91, a first vertical conveying mechanism 92, a horizontal moving mechanism 94, a second vertical conveying mechanism 95 and a second conveying belt 96. The first conveying belt 91 is arranged to pass through the inlet 14 into the drying cavity 11. The first vertical conveying mechanism 92 is arranged in the drying cavity 11 along the vertical direction of the box 1, and one end of the first vertical conveying mechanism 92 is connected to one end of the first conveying belt 91. One end of the horizontal moving mechanism 94 is connected to the other end of the first vertical conveying mechanism 92, and the other end of the horizontal moving mechanism 94 is connected to one end of the second vertical conveying mechanism 95. The second vertical conveying mechanism 95 is arranged in the cooling cavity 13 along the vertical direction of the box 1. The second conveying belt 96 is arranged to pass through the outlet 15 into the cooling cavity 13, and the other end of the second vertical conveying mechanism 95 is connected to one end of the second conveying belt 96. The first conveying belt 91 inputs materials into the drying cavity 11, and the second conveying belt 96 takes out materials from the cooling cavity 13. The first vertical conveying mechanism 92 moves the materials to the transition cavity 12 at the top of the box 1, and the second vertical conveying mechanism 95 moves the materials moved out of the transition cavity 12 downward. The horizontal moving mechanism 94 is arranged in the transition cavity 12, and is used to move the materials from the first vertical conveying mechanism 92 to the second vertical conveying mechanism 95.

[0046] More preferably, the conveying device 9 further comprises a first mechanical arm 98 and a second mechanical arm 97. The first mechanical arm 98 is arranged on the side of the inlet 14 of the box 1 and above the first conveying belt 91, and the second mechanical arm 97 is arranged on the side of the outlet 15 of the box 1 and above the second conveying belt 96. The first mechanical arm 98 and the second mechanical arm 97 are used to respectively take out or put into the materials to be processed on the first conveying belt 91 and the second conveying belt 96.

[0047] The first conveying belt 91 and the second conveying belt 96 are both connected below the first vertical conveying mechanism 92 or the second vertical conveying mechanism 95, and can be lowered when cooperating with the mechanical arms to facilitate the materials to be put in, and can be raised when conveying the materials into the box 1 to transfer the materials to the first vertical conveying mechanism 92 or the second vertical conveying mechanism 95. In addition, the first conveying belt 91 and the second conveying belt 96 are provided with a transition conveying belt at one end thereof facing the box 1, and the transition conveying belt is used to transfer the materials for a short distance.

[0048] More preferably, the horizontal moving mechanism 94 comprises a guide rail 941, a trolley 942 and a hook 943, the guide rail 941 is arranged in the transition chamber 12 on the top of the frame 93, the guide rail 941 extends across the top of the drying chamber 11 and the cooling chamber 13, the trolley 942 is slidingly connected to the guide rail 941 and can move between the two openings of the transition chamber 12, the hook 943 is telescopically connected to the trolley 942 and is used to grab the tray 2 loaded with materials, when the trolley 942 moves above the drying chamber 11, the first vertical conveying mechanism 92 moves the tray 2 loaded with materials above the trolley 942, after the hook 943 hooks the tray 2, the trolley 942 moves above the cooling chamber 13 on the guide rail 941, and the second vertical conveying mechanism 95 takes away the tray 2, thereby realizing the transfer of the materials on the tray 2 from the drying chamber 11 to the cooling chamber 13.

[0049] More preferably, the first vertical conveying mechanism 92 comprises two vertically arranged conveying belts, a plurality of hooks 921 are arranged on the conveying belts at intervals for supporting the tray 2, the trays 2 are arranged at intervals in the vertical direction on the first vertical conveying mechanism 92, which facilitates accurate temperature control of the materials on the single tray 2, the two conveying belts rotate towards each other for upward conveying of the tray 2, the width of the first conveying belt 91 is smaller than the interval of the two conveying belts, so that the first conveying belt 91 and the two conveying belts are staggered, the hooks 921 on the two conveying belts can take away the tray 2 from the first conveying belt 91, the second vertical conveying mechanism 95 has the same structure as the first vertical conveying mechanism 92, and the second conveying belt 96 is also staggered with the second vertical conveying mechanism 95.

[0050] More preferably, the first conveying belt 91 and the second conveying belt 96 are synchronous belts.

[0051] More preferably, the first conveying belt 91, the second conveying belt 96, the first vertical conveying mechanism 92, the second vertical conveying mechanism 95 and the horizontal moving mechanism 94 are all controlled by separate servo controllers, which are used to accurately realize the motion control of each conveying mechanism and complete the transfer and conveying of the tray 2.

[0052] The working process of the vertical continuous oven is as follows:

[0053] The material to be dried is placed into the tray 2, the tray 2 is carried by the first conveying belt 91, and after entering the drying cavity 11 from the inlet 14 of the box 1, the first vertical conveying mechanism 92 in the drying cavity 11 moves upward in a step-by-step manner to sequentially take away the tray 2 on the first conveying belt 91. After the tray 2 enters the drying cavity 11, the heating unit 3 starts to work, the air heated by the heating device 32 is blown into the tray 2 in the drying cavity 11 by the air distribution box 31, and the material on the tray 2 is heated and dried. After the tray 2 moves to the top of the drying cavity 11, it enters the transition cavity 12. The tray 2 is taken away by the trolley 942 of the horizontal moving mechanism 94 through the hook 943 and moves to the upper part of the cooling cavity 13 along the guide rail 941. The tray 2 is separated from the hook 943 and placed on the second vertical conveying mechanism 95. The second vertical conveying mechanism 95 moves downward, and at the same time, the cooling fan 6 inhales cooling air to cool the material on the tray 2. After cooling is completed, the tray 2 moves to the bottom of the cooling cavity 13 and is moved out of the box 1 through the outlet 15 by the second conveying belt 96. The material is continuously placed on the tray 2 of the first conveying belt 91 by the first mechanical arm 98, and after drying, the material on the tray 2 of the second conveying belt 96 is taken away by the second mechanical arm 97. The tray 2 does not go offline to complete the drying cycle, and the automatic continuous drying of the material is realized.

[0054] Example two

[0055] The embodiment also discloses a drying method realized by the vertical continuous drying oven, and the method comprises the following steps:

[0056] S1, drying: the material to be dried enters the drying cavity 11 from the inlet 14 of the box 1 in sequence, hot air in the drying cavity 11 is released to gradually dry the material, and the material moves upward from the bottom of the box 1 and is dried by hot air at different temperatures;

[0057] S2, cooling: the dried material enters the cooling cavity 13 from the drying cavity 11 through the transition cavity 12 in sequence, cold air in the cooling cavity 13 is released to cool the material, and after the material is cooled, the material is moved out through the outlet 15 of the box 1. The transition cavity 12 takes away the material from the drying cavity 11 and moves into the cooling cavity 13. When the material is not moved, the transition cavity 12 is in a closed state to prevent heat leakage from the drying cavity 11;

[0058] S3, heat circulation: the hot air in the drying cavity 11 is circulated back to the drying cavity 11 after drying the material, enters the drying cavity 11 to dry the material after being heated again, the cold air in the cooling cavity 13 is heated by the waste heat of the material and flows into the drying cavity 11, the heated hot air enters the drying cavity 11 to heat and dry the material, the recycled air enters the drying cavity 11 to heat and dry the material after being heated again, the recycled heat is more, the circulation path of the heat in the box 1 is short, the heat loss is small, and the energy consumption for heating and drying the material is reduced.

[0059] Further modifications and alterations of the described embodiments are also within the scope of the application. Accordingly, the specification and examples are to be regarded in an illustrative manner and not a restrictive one, and all such alterations and further modifications are intended to be included within the scope of the application. Additionally, although the description above contains many specificities, these should not be construed as limiting the scope of the application but as merely providing illustrations of some of the embodiments of the application.

Claims

1. A vertical continuous oven comprising a housing (1) having an inlet (14) and an outlet (15) on each of its two side walls, characterized in that: The box (1) is further provided with a drying cavity (11), a transition cavity (12) and a cooling cavity (13), the drying cavity (11) and the cooling cavity (13) are respectively arranged on both sides of the box (1), and the drying cavity (11) and the cooling cavity (13) are communicated by the transition cavity (12); Further comprising a heating unit (3), the heating unit (3) is arranged on the outer wall of the box (1), and the heating unit (3) is communicated with the drying cavity (11); Further comprising a cooling fan (6), the cooling fan (6) is communicated with the cooling cavity (13); The heating unit (3) comprises a wind distribution box (31), a heating device (32) and a heating fan (4), the wind distribution box (31) is arranged on the side wall of the drying cavity (11), one end of the heating device (32) is communicated with the wind distribution box (31), and the other end of the heating device (32) is communicated with the heating fan (4); A plurality of air outlets (35) are arranged on the wind distribution box (31) and face the horizontal direction; Further comprising a circulating fan (5), a return air pipeline (52), a third valve (51) and a fourth valve (53), the air inlet end of the circulating fan (5) is communicated with the cooling cavity (13), the air outlet end of the circulating fan (5) is communicated with the air inlet end of the heating fan (4), one end of the return air pipeline (52) is communicated with the drying cavity (11), the other end of the return air pipeline (52) is connected with the air inlet end of the heating fan (4), the third valve (51) is arranged between the circulating fan (5) and the air inlet end of the heating fan (4), and the fourth valve (53) is arranged on the return air pipeline (52).

2. The vertical continuous oven according to claim 1, wherein: A plurality of the heating units (3) are arranged on the outer wall of the box (1) in the vertical direction, and the plurality of the heating units (3) are respectively communicated with the drying cavity (11).

3. The vertical continuous oven according to claim 1, wherein: The heating unit (3) further comprises a first valve (33) and a second valve (34), the first valve (33) is arranged between the heating device (32) and the heating fan (4), and the second valve (34) is arranged between the heating device (32) and the wind distribution box (31).

4. The vertical continuous oven according to claim 1, wherein: The drying cavity (11) and the cooling cavity (13) are arranged in parallel in the vertical direction of the box (1), and the transition cavity (12) is arranged at the top of the drying cavity (11) and the cooling cavity (13).

5. The vertical continuous oven according to any one of claims 1-4, wherein: Further comprising a conveying device (9) for circulating the material into the box (1), the conveying device (9) comprising a frame (93), a first conveying belt (91), a first vertical conveying mechanism (92), a horizontal moving mechanism (94), a second vertical conveying mechanism (95) and a second conveying belt (96), the first conveying belt (91) being arranged to pass through the inlet (14) into the drying cavity (11), the first vertical conveying mechanism (92) being arranged in the vertical direction of the box (1) in the drying cavity (11), one end of the first vertical conveying mechanism (92) being connected with one end of the first conveying belt (91), one end of the horizontal moving mechanism (94) being connected with the other end of the first vertical conveying mechanism (92), the other end of the horizontal moving mechanism (94) being connected with one end of the second vertical conveying mechanism (95), the second vertical conveying mechanism (95) being arranged in the vertical direction of the box (1) in the cooling cavity (13), the second conveying belt (96) being arranged to pass through the outlet (15) into the cooling cavity (13), the other end of the second vertical conveying mechanism (95) being connected with one end of the second conveying belt (96).

6. A drying method characterized by: The vertical continuous oven according to any one of claims 1-5, comprising the following steps: S1, drying: the material to be dried is sequentially fed into the drying cavity (11) from the inlet (14) of the box (1), hot air is released in the drying cavity (11) to gradually dry the material; S2, cooling: the dried material is sequentially fed into the cooling cavity (13) from the drying cavity (11) through the transition cavity (12), cold air is released in the cooling cavity (13) to cool the material, and the cooled material is removed from the outlet (15) of the box (1); S3, heat circulation: the hot air in the drying cavity (11) is circulated back to the drying cavity (11) after drying the material, and is heated again to dry the material in the drying cavity (11), the cold air in the cooling cavity (13) is heated by the waste heat of the material and then flows into the drying cavity (11) for use, and the heated hot air enters the drying cavity (11) to heat and dry the material.

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