Vertical continuous drying oven and drying method

Abstract

The invention discloses a vertical continuous drying oven and a drying method, and belongs to the field of drying equipment, the vertical continuous drying oven comprises an oven body, two side walls of the oven body are respectively provided with an inlet and an outlet, the oven body is also internally provided with a drying cavity, a transition cavity and a cooling cavity, the drying cavity and the cooling cavity are respectively arranged on two sides in the oven body, and the transition cavity is communicated with the drying cavity. The drying cavity and the cooling cavity are communicated through the transition cavity, materials enter the cooling cavity through the transition cavity after being dried through the drying cavity, heat in the drying cavity can be recycled, the heat is not prone to leakage in the conveying process, waste heat on the materials can be recycled, and heat loss is reduced.

Description

Technical Field

[0001] The invention relates to the field of drying equipment, and in particular to a vertical continuous drying oven and a drying method. Background Art

[0002] Before forming, sintered products need to be dried to remove excess moisture and perform preliminary shaping. Existing product drying lines have two forms. One is an intermittent oven, whose working principle is to place the products to be dried evenly in the oven, and then gradually inject dry hot air, gradually increase the temperature of the dry hot air to the target temperature according to the process temperature curve, and maintain a stable temperature for a certain period of time to evaporate the moisture in the product. During heating, the humid hot air is slowly exhausted simultaneously, so that the product slowly cools down, and the workpiece is taken out after reaching the set temperature; the other adopts a horizontally arranged drying kiln, the product enters from the front end of the drying kiln, and then from front to back according to the drying temperature curve and contact with dry hot air, the product moves in the drying kiln and the moisture is evaporated, and the constant temperature is maintained in the kiln for a period of time and then gradually cooled until it is removed from the end of the drying kiln; the energy waste is huge, and the room temperature air is heated to the target temperature each time and then exhausted. The above two drying methods have the disadvantages of large horizontal layout, short contact time between the drying airflow and the product, too many airflow cycles, and high energy consumption. There is a need for a drying box with small footprint, high drying efficiency and low energy consumption.

[0003] The existing patent application with publication number CN105823318A discloses a vertical food drying device, which is characterized in that it includes a vertically arranged oven, a partition is provided in the middle of the inner cavity of the oven to divide it into an upper and lower section, three sides of the partition are fixedly sealed with the inner wall of the oven, the other side of the partition is spaced from the inner wall of the oven, and a slide plate is arranged obliquely downward on the inner wall of the oven corresponding to the side of the partition, the side of the slide plate with a lower height extends to the bottom of the partition, and a curtain is provided between the partition and the side of the slide plate; in the upper section of the inner cavity of the oven, no less than two belt conveyors are arranged alternately from top to bottom, the belt conveyors are arranged horizontally, the blanking ends of the upper belt conveyors are located above the feeding ends of the lower belt conveyors, and a feed port is provided on the side wall of the oven corresponding to the feeding end of the uppermost belt conveyor in the upper section of the inner cavity of the oven, and the feed port is spaced from the inner wall of the oven to the lower wall. There is a guide plate between the feeding ends of the conveyors, and the blanking end of the lowest belt conveyor in the upper section of the oven cavity is located above the spacing; there are also no less than two belt conveyors arranged alternately from top to bottom in the lower section of the oven cavity, and the belt conveyors are all arranged horizontally, and the blanking ends of the upper belt conveyors are all located above the feeding ends of the lower belt conveyors, and the feeding end of the highest belt conveyor in the lower section of the oven cavity is located below the spacing, and the bottom of the box corresponding to the blanking end of the lowest belt conveyor in the lower section of the oven cavity has a discharge port; a hot air inlet and a first air outlet are provided on the oven side wall corresponding to the upper section of the oven cavity, and a heater and a first fan are provided on the hot air inlet; a cold air inlet and a second air outlet are provided on the oven side wall corresponding to the lower section of the oven cavity, and a second fan is provided on the cold air inlet. The vertical dryer is easy to damage materials and has high energy consumption. Summary of the invention

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

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] A vertical continuous oven comprises a box body, wherein an inlet and an outlet are respectively arranged on two side walls of the box body, and a drying chamber, a transition chamber and a cooling chamber are also arranged in the box body, wherein the drying chamber and the cooling chamber are respectively arranged on two sides of the box body, and the drying chamber and the cooling chamber are connected by the transition chamber, and after the material is dried in the drying chamber, the material enters the cooling chamber through the transition chamber, and the heat in the drying chamber can be recycled, the heat is not easily leaked during the transportation process, and the waste heat on the material can be recovered, thereby reducing heat loss.

[0007] Furthermore, it also includes a heating unit, which is arranged on the outer wall of the box body and is connected to the drying chamber to provide heat to the drying chamber.

[0008] Furthermore, a plurality of the heating units are arranged on the outer wall of the box body along the vertical direction, and the plurality of the heating units are respectively connected to the drying chamber, so as to control the drying temperature of the material in sections along the conveying direction.

[0009] Furthermore, the heating unit includes an air distribution box, a heating device and a heating fan. The air distribution box is arranged on the side wall of the drying chamber, one end of the heating device is connected to the air distribution box, and the other end of the heating device is connected to the heating fan, which is used to provide hot air to the drying chamber for drying.

[0010] Furthermore, the heating unit also includes a first valve and a second valve, wherein the first valve is arranged between the heating device and the heating fan, and the second valve is arranged between the heating device and the air distribution box, for accurately controlling the heating amount.

[0011] Furthermore, it also includes a cooling fan, which is connected to the cooling cavity and is used to cool the materials in the cooling box.

[0012] Furthermore, it also includes a circulation fan, a return air duct, a third valve and a fourth valve, the air inlet end of the circulation fan is connected to the cooling chamber, the air outlet end of the circulation fan is connected to the air inlet end of the heating fan, one end of the return air duct is connected to the drying chamber, and the other end of the return air duct is connected to the air inlet end of the heating fan, the third valve is arranged between the circulation fan and the air inlet end of the heating fan, and the fourth valve is arranged on the return air duct.

[0013] Preferably, the drying chamber and the cooling chamber are arranged side by side in a vertical direction of the box body, and the transition chamber is arranged on the top of the drying chamber and the cooling chamber.

[0014] As a more preferred embodiment, it also includes a conveying device, which is used to cyclically convey materials into the box body. The conveying device includes a frame, a first conveyor belt, a first vertical conveying mechanism, a transverse mechanism, a second vertical conveying mechanism and a second conveyor belt. The first conveyor belt is configured to pass through the entrance and enter the drying chamber. The first vertical conveying mechanism is arranged in the drying chamber along the vertical direction of the box body. One end of the first vertical conveying mechanism is connected to one end of the first conveyor belt, one end of the transverse mechanism is connected to the other end of the first vertical conveying mechanism, and the other end of the transverse mechanism is connected to one end of the second vertical conveying mechanism. The second vertical conveying mechanism is arranged in the cooling chamber along the vertical direction of the box body. The second conveyor belt is configured to pass through the exit and enter the cooling chamber. The other end of the second vertical conveying mechanism is connected to one end of the second conveyor belt, which is used to automatically and continuously transport materials into the box body.

[0015] The second purpose of the present invention is to provide a drying method, which solves the problems of low efficiency and large energy consumption of existing material drying.

[0016] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0017] A drying method, implemented by the vertical continuous drying oven, comprises the following steps:

[0018] S1, drying: the materials to be dried enter the drying chamber from the inlet of the box in sequence, and hot air is released in the drying chamber to gradually dry the materials;

[0019] S2, cooling: the dried materials enter the cooling chamber from the drying chamber through the transition chamber in sequence, the cooling chamber releases cold air to cool the materials, and the materials are removed from the outlet of the box after cooling;

[0020] S3. Heat circulation: the hot air in the drying chamber circulates back to the drying chamber after drying the material, and enters the drying chamber to dry the material after being heated again. The cold air in the cooling chamber is heated by the residual heat of the material and flows into the drying chamber for use. The heated hot air enters the drying chamber to heat and dry the material. The waste heat of the drying chamber and the residual heat brought out by the material can be recycled, thereby improving the utilization rate of heat and reducing energy consumption.

[0021] The beneficial effects of the present invention are:

[0022] (1) The vertical continuous drying oven is provided with a drying chamber, a transition chamber and a cooling chamber. The transition chamber is used to connect the drying chamber and the cooling chamber, and the materials can be heated and dried. The vertical structure occupies a small area and is easy to arrange. The materials can be continuously put into the oven for drying. The drying efficiency of the materials is high. The fully automatic operation requires low manpower and saves the use cost.

[0023] (2) The vertical continuous drying oven is provided with a heating fan, a cooling fan and a circulating fan. The heating fan controls the heat supply to the drying chamber, and the circulating fan recovers the waste heat of the cooling chamber and recycles the heat of the drying chamber. The waste heat of the cooling chamber is used to preheat the cold air, thereby achieving the purpose of reusing heat and reducing the energy consumption of the drying oven.

[0024] (3) The drying method dries and cools the material in the drying chamber, transition chamber and cooling chamber. By recycling the waste heat in the drying chamber and preheating the cooling air to the drying chamber with the waste heat of the material in the cooling chamber, the heat reuse rate is improved while ensuring the drying efficiency, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Axonometric view of the vertical continuous oven provided by the present invention Figure 1 ;

[0026] Figure 2 Axonometric view of the vertical continuous oven provided by the present invention Figure 2 ;

[0027] Figure 3 A cross-sectional structural diagram of a vertical continuous oven provided by the present invention;

[0028] Figure 4 A structural diagram of the heating device provided by the present invention;

[0029] Figure 5 This is a structural diagram of the conveying device provided by the present invention.

[0030] Reference numerals:

[0031] 1. Box body; 11. Drying chamber; 12. Transition chamber; 13. Cooling chamber; 14. Entrance; 15. Exit; 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. Transverse mechanism; 941. Guide rail; 942. Pulley; 943. Hook; 95. Second vertical conveying mechanism; 96. Second conveyor belt; 97. Second manipulator; 98. First manipulator. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] like Figure 1-Figure 5 As shown, the present embodiment discloses a vertical continuous drying oven, comprising a box body 1, wherein an inlet 14 and an outlet 15 are respectively arranged on the two side walls of the box body 1, a drying chamber 11, a transition chamber 12 and a cooling chamber 13 are further arranged in the box body 1, the drying chamber 11 and the cooling chamber 13 are respectively arranged on the two sides of the box body 1, the drying chamber 11 and the cooling chamber 13 are connected by the transition chamber 12, hot air is used in the drying chamber 11 to heat and dry the material, and 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, and the cold air in the cooling chamber 13 can be preheated by absorbing the heat emitted by the material, and can then be heated and used through the drying chamber 11, thereby improving the utilization rate of heat, a partition 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, thereby reducing heat dissipation and improving the utilization rate of heat in the drying chamber 11.

[0035] Furthermore, it also includes a heating unit 3, which is arranged on the outer wall of the box body 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 dehumidifying the material.

[0036] Furthermore, multiple heating units 3 are arranged on the outer wall of the box body 1 in the vertical direction, and the multiple heating units 3 are respectively connected to the drying chamber 11. The multiple heating units 3 are arranged along the moving direction of the material, which can control the temperature of heating and drying the material at different stages, realize precise temperature control, and improve the quality and efficiency of drying the material.

[0037] Furthermore, the heating unit 3 includes an air distribution box 31, a heating device 32 and a heating fan 4. The air distribution box 31 is arranged on the side wall of the drying chamber 11, one end of the heating device 32 is connected to the air distribution box 31, and the other end of the heating device 32 is connected to the heating fan 4. The air distribution box 31 is arranged on both side walls of the drying chamber 11, and a plurality of air outlets 35 are provided on the air distribution box 31. The air outlets 35 are arranged in a horizontal direction. The air heated by the heating device 32 is blown into the drying chamber 11 in a horizontal direction through the air outlets 35, and while heating the material, it is affected by the suction force of the heating fan 4 and moves downward in a vertical direction. After the hot air heats the material, it is re-sucked by the heating fan 4 and then heated by the heating device 32, so that the hot air can be reused, the hot air circulation path is short, and the heat utilization efficiency is high.

[0038] Preferably, the heating device 32 uses an electric heating wire, which heats up quickly, controls temperature accurately, and heats the air without any by-products.

[0039] More preferably, a dryer is provided on the air inlet end of the heating blower 4 for purifying and dehumidifying the recycled hot air.

[0040] Furthermore, the heating unit 3 also includes 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 air distribution box 31. The first valve 33 is used to control the air volume input to the heating device 32, and the second valve 34 is used to control the air volume injected into the drying chamber 11, thereby controlling the temperature at different positions of the drying chamber 11.

[0041] Furthermore, it also includes a cooling fan 6, which is connected to the cooling chamber 13. The cooling fan 6 is used to input cold air into the cooling chamber 13 to cool the material.

[0042] Furthermore, it also includes a circulating fan 5, a return air duct 52, a third valve 51 and a fourth valve 53. The air inlet end of the circulating fan 5 is connected to the cooling chamber 13, the air outlet end of the circulating fan 5 is connected to the air inlet end of the heating fan 4, one end of the return air duct 52 is connected to the drying chamber 11, and the other end of the return air duct 52 is connected to the air inlet end of the heating fan 4. The third valve 51 is arranged between the air inlet ends of the circulating fan 5 and the heating fan 4, and the fourth valve 53 is arranged on the return air duct 52. The circulating fan 5 inputs the preheated air in the cooling chamber 13 to the heating fan 4 through the return air duct 52, so as to recover the waste heat dissipated from the material and reduce the heat consumption to a greater extent. The fourth valve 53 is used to control the opening and closing of the return air duct 52 to prevent cold air from entering the heating fan 4.

[0043] More preferably, a heat exhaust valve 54 is provided at the air outlet of the heating fan 4, and the heat exhaust valve 54 is connected to the heating unit 3, so that the recovered hot air and the heat generated by the heating device 32 can be discharged to the outside, thereby preventing the drying chamber 11 from overheating and quickly exhausting heat.

[0044] More preferably, the drying chamber 11 and the cooling chamber 13 are arranged side by side in the vertical direction of the box body 1, and the transition chamber 12 is arranged at the top of the drying chamber 11 and the cooling chamber 13. Two openings are provided on the transition chamber 12, and the two openings are used to connect the drying chamber 11 and the cooling chamber 13 respectively. A movable door is provided on the opening. When the drying chamber 11 or the cooling chamber 13 is in use, the movable door is closed. When drying or cooling is completed, the movable door is opened for the material to be used. The movable door can prevent heat loss.

[0045] More preferably, see Figure 5, and also includes a conveying device 9, which is used to cyclically convey materials into the box body 1. The conveying device 9 includes a frame 93, a first conveyor belt 91, a first vertical conveying mechanism 92, a transverse mechanism 94, a second vertical conveying mechanism 95 and a second conveyor belt 96. The first conveyor belt 91 is arranged to pass through the entrance 14 and enter the drying chamber 11. The first vertical conveying mechanism 92 is arranged in the drying chamber 11 along the vertical direction of the box body 1. One end of the first vertical conveying mechanism 92 is connected to one end of the first conveyor belt 91, one end of the transverse mechanism 94 is connected to the other end of the first vertical conveying mechanism 92, and the other end of the transverse 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 chamber 13 along the vertical direction of the box body 1, and the second conveyor belt 96 is arranged to pass through the outlet 15 and enter the cooling chamber 13. The other end of the second vertical conveying mechanism 95 is connected with one end of the second conveyor belt 96. The first conveyor belt 91 inputs materials into the drying chamber 11, and the second conveyor belt 96 takes materials out of the cooling chamber 13. The first vertical conveying mechanism 92 carries the materials to the transition chamber 12 at the top of the box body 1, and the second vertical conveying mechanism 95 carries the materials moved out of the transition chamber 12 and moves downward. The transverse movement mechanism 94 is arranged in the transition chamber 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 also includes a first manipulator 98 and a second manipulator 97. The first manipulator 98 is arranged on the side of the entrance 14 of the box body 1 and is above the first conveyor belt 91. The second manipulator 97 is arranged on the side of the exit 15 of the box body 1 and is above the second conveyor belt 96. The first manipulator 98 and the second manipulator 97 are used to take out or put materials to be processed from the first conveyor belt 91 and the second conveyor belt 96 respectively.

[0047] Among them, the first conveyor belt 91 and the second conveyor belt 96 are both connected to the bottom of the first vertical conveying mechanism 92 or the second vertical conveying mechanism 95 by lifting and lowering. They can be lowered when cooperating with the robot to facilitate the placement of materials, and can be raised when conveying materials into the box body 1 to transfer materials to the first vertical conveying mechanism 92 or the second vertical conveying mechanism 95. In addition, a transition conveyor belt is provided at one end of the first conveyor belt 91 and the second conveyor belt 96 facing the box body 1, and the transition conveyor belt is used to transfer materials over short distances.

[0048] More preferably, the transverse movement mechanism 94 includes a guide rail 941, a pulley 942 and a hook 943. The guide rail 941 is arranged in the transition chamber 12 at the top of the frame 93. The guide rail 941 spans the top of the drying chamber 11 and the cooling chamber 13. The pulley 942 is slidably 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 pulley 942 and is used to grab the tray 2 containing materials. When the pulley 942 moves to the top of the drying chamber 11, the first vertical conveying mechanism 92 moves the tray 2 containing materials to the top of the pulley 942. After the hook 943 hooks the tray 2, it moves on the guide rail 941 to the top of the cooling chamber 13, and the tray 2 is taken away by the second vertical conveying mechanism 95, thereby realizing the transfer of materials on the tray 2 from the drying chamber 11 to the cooling chamber 13.

[0049] More preferably, the first vertical conveying mechanism 92 includes two vertically arranged conveyor belts, and a plurality of hooks 921 are arranged at intervals on the conveyor belts for holding the pallet 2. The pallets 2 are spaced apart in the vertical direction on the first vertical conveying mechanism 92, so as to facilitate accurate temperature control of materials on a single pallet 2. The two conveyor belts rotate towards each other and are used to transport the pallets 2 upward. The width of the first conveyor belt 91 is smaller than the spacing between the two conveyor belts, so that the first conveyor belt 91 is staggered with the two conveyor belts. The hooks 921 on the two conveyor belts can remove the pallet 2 from the first conveyor belt 91. The second vertical conveying mechanism 95 has the same structure as the first vertical conveying mechanism 92, and similarly, the second conveyor belt 96 is staggered with the second vertical conveying mechanism 95.

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

[0051] More preferably, the first conveyor belt 91 , the second conveyor belt 96 , the first vertical conveying mechanism 92 , the second vertical conveying mechanism 95 and the transverse movement mechanism 94 are all controlled by separate servo controllers for accurately realizing the motion control of each conveying mechanism to complete the transfer and transportation of the pallet 2 .

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

[0053] The material to be dried is placed in the tray 2, and the tray 2 is carried by the first conveyor belt 91, enters the drying chamber 11 from the entrance 14 of the box body 1 and stops, and the first vertical conveying mechanism 92 in the drying chamber 11 moves upward in a step-by-step manner to take away the tray 2 on the first conveyor belt 91 in turn. After the tray 2 enters the drying chamber 11, the heating unit 3 is started, and the air is heated by the heating device 32 and blown into the tray 2 of the drying chamber 11 by the air distribution box 31, so as to heat and dry the material on the tray 2. After the tray 2 moves to the top of the drying chamber 11, it enters the transition chamber 12, and the pulley 942 of the transverse movement mechanism 94 takes away the tray 2 by the hook 943 and moves along the guide rail 941 moves to the upper main of the cooling chamber 13, 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 the cooling fan 6 sucks in cooling air to cool the material on the tray 2. After cooling, the tray 2 moves to the bottom of the cooling chamber 13 and is moved to the outside of the box body 1 by the second conveyor belt 96 through the outlet 15. The material is continuously placed on the tray 2 of the first conveyor belt 91 by the first manipulator 98. After drying, the second manipulator 97 takes away the material on the tray 2 on the second conveyor belt 96. The tray 2 does not go offline to complete the drying cycle, thereby realizing fully automatic continuous drying of the material.

[0054] Embodiment 2

[0055] This embodiment also discloses a drying method, which is implemented by a vertical continuous drying oven, comprising the following steps:

[0056] S1, drying: the materials to be dried enter the drying chamber 11 from the inlet 14 of the box 1 in sequence, and the hot air is released in the drying chamber 11 to gradually dry the materials. The materials move upward from the bottom of the box 1 and are dried by hot air at different temperatures;

[0057] S2, cooling: the dried materials enter the cooling chamber 13 from the drying chamber 11 through the transition chamber 12 in sequence, and the cooling chamber 13 releases cold air to cool the materials. After the materials are cooled, they are moved out through the outlet 15 of the box body 1. The transition chamber 12 takes the materials from the drying chamber 11 and moves them to the cooling chamber 13. The transition chamber 12 is in a closed state when the materials are not moved to prevent the heat in the drying chamber 11 from leaking out;

[0058] S3. Heat circulation: the hot air in the drying chamber 11 circulates back to the drying chamber 11 after drying the material, and enters the drying chamber 11 to dry the material after being heated again. The cold air in the cooling chamber 13 is heated by the residual heat of the material and flows into the drying chamber 11 for use. The heated hot air enters the drying chamber 11 to heat and dry the material, and the refluxed air is heated again and enters the drying chamber 11 to heat and dry the material. A large amount of heat is recovered, the heat circulation path in the box 1 is short, and the heat loss is small, so that the energy consumption of heating and drying materials is reduced.

[0059] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A vertical continuous oven, comprising a box body (1), wherein two side walls of the box body (1) are respectively provided with an inlet (14) and an outlet (15), characterized in that: The housing (1) is further provided with a drying chamber (11), a transition chamber (12) and a cooling chamber (13); the drying chamber (11) and the cooling chamber (13) are respectively arranged on two sides of the housing (1); the drying chamber (11) and the cooling chamber (13) are connected via the transition chamber (12).

2. The vertical continuous drying oven according to claim 1, characterized in that: It also comprises a heating unit (3), wherein the heating unit (3) is arranged on the outer wall of the box body (1), and the heating unit (3) is connected to the drying chamber (11).

3. The vertical continuous drying oven according to claim 2, characterized in that: The plurality of heating units (3) are arranged on the outer wall of the box body (1) in a vertical direction, and the plurality of heating units (3) are respectively connected to the drying chamber (11).

4. The vertical continuous drying oven according to claim 2 or 3, characterized in that: The heating unit (3) comprises an air distribution box (31), a heating device (32) and a heating fan (4); the air distribution box (31) is arranged on a side wall of the drying chamber (11); one end of the heating device (32) is connected to the air distribution box (31); and the other end of the heating device (32) is connected to the heating fan (4).

5. The vertical continuous drying oven according to claim 4, characterized in that: The heating unit (3) further comprises a first valve (33) and a second valve (34), wherein 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 air distribution box (31).

6. The vertical continuous drying oven according to claim 5, characterized in that: It also includes a cooling fan (6), and the cooling fan (6) is connected to the cooling chamber (13).

7. The vertical continuous drying oven according to claim 6, characterized in that: The air conditioner further comprises a circulation fan (5), a return air pipeline (52), a third valve (51) and a fourth valve (53); the air inlet end of the circulation fan (5) is connected to the cooling chamber (13); the air outlet end of the circulation fan (5) is connected to the air inlet end of the heating fan (4); one end of the return air pipeline (52) is connected to the drying chamber (11); the other end of the return air pipeline (52) is connected to the air inlet end of the heating fan (4); the third valve (51) is arranged between the air inlet ends of the circulation fan (5) and the heating fan (4); and the fourth valve (53) is arranged on the return air pipeline (52).

8. The vertical continuous drying oven according to claim 1, characterized in that: The drying chamber (11) and the cooling chamber (13) are arranged side by side in the vertical direction of the box body (1), and the transition chamber (12) is arranged on the top of the drying chamber (11) and the cooling chamber (13).

9. The vertical continuous drying oven according to any one of claims 1 to 3, characterized in that: The drying chamber (11) further comprises a conveying device (9), wherein the conveying device (9) is used for cyclically conveying materials into the box body (1), wherein the conveying device (9) comprises a frame (93), a first conveyor belt (91), a first vertical conveying mechanism (92), a transverse mechanism (94), a second vertical conveying mechanism (95) and a second conveyor belt (96), wherein the first conveyor belt (91) is arranged to pass through the entrance (14) and enter the drying chamber (11), wherein the first vertical conveying mechanism (92) is arranged in the drying chamber (11) along the vertical direction of the box body (1), and wherein the first vertical conveying mechanism (92) One end of the transverse mechanism (94) is connected to one end of the first conveyor belt (91), one end of the transverse mechanism (94) is connected to the other end of the first vertical conveyor mechanism (92), the other end of the transverse mechanism (94) is connected to one end of the second vertical conveyor mechanism (95), the second vertical conveyor mechanism (95) is arranged in the cooling chamber (13) along the vertical direction of the box body (1), the second conveyor belt (96) is arranged to pass through the outlet (15) and enter the cooling chamber (13), and the other end of the second vertical conveyor mechanism (95) is connected to one end of the second conveyor belt (96).

10. A drying method, characterized in that: The method is realized by the vertical continuous oven according to any one of claims 1 to 9, comprising the following steps: S1, drying: the materials to be dried enter the drying chamber (11) in sequence from the inlet (14) of the housing (1), and hot air is released from the drying chamber (11) to gradually dry the materials; S2, cooling: the dried material enters the cooling chamber (13) from the drying chamber (11) through the transition chamber (12), and the cooling chamber (13) releases cold air to cool the material. After the material is cooled, it is removed from the box (1) through the outlet (15); S3, heat circulation: the hot air in the drying chamber (11) circulates back to the drying chamber (11) after drying the material, and enters the drying chamber (11) to dry the material after being heated again. The cold air in the cooling chamber (13) is heated by the residual heat of the material and flows into the drying chamber (11) for use. The heated hot air enters the drying chamber (11) to heat and dry the material.

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