Tea dryer capable of recycling exhaust waste heat

Abstract

The invention discloses a tea dryer capable of recycling exhaust waste heat, the tea dryer comprises a feeding machine and a dryer, the dryer comprises a drying box, a conveying device and a heat supply device, the drying box comprises a box body and a partition plate arranged in the box body, the box body is divided into a drainage area and a drying area through the partition plate, and the conveying device is arranged in the box body. A waste heat recovery device communicated with the drainage area is further arranged at the top of the box body, a flow guide device is arranged on the side face of the box body and communicated with the waste heat recovery device and the drying area, and hot air in the drying area forms hot air circulation through the drainage area, the waste heat recovery device and the flow guide device. By the adoption of the tea leaf drying machine, exhaust waste heat is recycled, the utilization rate of hot air is increased, and heat energy loss is reduced. Meanwhile, recovered exhaust waste heat is heated and then returns into the box body, the temperature difference between the upper layer and the lower layer in the drying area is effectively reduced, the quality of tea leaves is improved, meanwhile, energy loss is reduced, and the device is simple in overall structure, convenient to operate and suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of tea processing equipment, and particularly relates to a tea dryer for recycling exhaust waste heat. Background Art

[0002] In the process of tea processing and production, it is necessary to dry the tea to remove the moisture in the tea, reduce the moisture content in the tea cells, shape the tea, and reduce its activity and remove the semi-permeability of the cell membrane to ensure that the subsequent processing can normally produce high-quality tea. Thus, it can be seen that the quality of tea drying will directly affect the quality of the tea. The tea drying methods mainly include three drying forms: drying, stir-frying, and sun-drying. Regardless of the type of tea produced and the drying equipment and method used, temperature is the main factor affecting the drying quality; temperature is the condition for chemical reactions. During the drying process, the thermal effect dominates, and it plays an important role in the formation and development of the tea quality. Drying is not only a process of tea losing water and shaping, but also a key process for the formation of more chemical components and good aroma components in the tea.

[0003] The existing tea dryers mainly include a frame, an oven provided on the frame with an air inlet and an air outlet, and a continuous transmission mechanism provided in the oven; a hot air device with an air outlet and an air inlet is connected to the air inlet of the oven, a fan is provided at the air inlet of the hot air device, the air outlet of the hot air device is communicated with the air inlet of the oven, and a heating device is provided in the hot air device. The cold air blown in by the fan is heated by the hot air device and then enters the oven. The hot air dries the tea and then is directly discharged from the oven. During the drying process, the temperature of each part in the oven remains basically the same. Since the drying temperature of the tea is different in different baking stages, the existing tea drying equipment is not conducive to drying the continuously incoming tea.

[0004] In addition, during the drying process of the existing tea dryers, the tea cannot be evenly distributed in the dryer, and the tea will pile up together, affecting the drying effect of the tea. To solve the problems of tea piling up and uneven drying during the drying process, the existing dryers generally add a conveying device with a flap structure to flip and dry the tea in the dryer to improve the drying quality of the tea. However, for the existing tea dryers, first, the hot air for drying directly discharges from the exhaust port of the dryer after passing through the tea in the conveying device, which not only causes waste of heat energy but also increases the production cost of the enterprise; second, the hot air used for drying in the dryer rises due to the hot gas and the cold gas descends, resulting in a relatively large temperature difference between the upper and lower spaces inside the dryer, which will affect the drying quality of the tea.

[0005] After retrieval, the patent document with the application publication number CN106343053A discloses a tea dryer with hierarchical temperature control, the patent document with the application publication number CN110006238A discloses a tipping dryer, and the patent document with the application publication number CN114353441A discloses a device for preheating tea by using the exhaust waste heat of a tea dryer. From the content disclosed in the three retrieved patent documents, tea dryers that meet the requirements of tea drying are provided from different perspectives. In order to meet the tea drying demand, reduce the temperature difference between the upper space and the lower space inside the dryer, enable the exhaust waste heat to be recycled, improve the utilization rate of hot air, reduce heat energy loss, improve the drying efficiency and drying effect, a tea dryer different from the prior art is thus provided to meet the usage requirements, which has particularly important significance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a tea dryer with a simple structure and convenient operation in view of the problems existing in the background technology. By using this tea dryer, the temperature difference between the upper space and the lower space inside the dryer can be effectively reduced, the exhaust waste heat can be recycled, the utilization rate of hot air can be improved, the heat energy loss can be reduced, and thus the drying efficiency and drying effect can be improved. Specifically, it is a tea dryer with exhaust waste heat recycling.

[0007] To solve the above technical problem, the technical solution adopted by the present invention is as follows: A tea dryer with exhaust waste heat recycling includes a feeding machine and a dryer. The dryer includes a drying box, a conveying device arranged in the drying box for conveying tea, and a heat supply device for providing heat to the drying box. The drying box includes a box body and a partition arranged in the box body. The box body is divided into a diversion area and a drying area by the partition. A waste heat recovery device communicated with the diversion area is further arranged at the top of the box body, and diversion devices symmetrically distributed are arranged on the side surface of the box body. The diversion devices are communicated with the waste heat recovery device and the drying area. The hot air in the drying area forms a hot air cycle through the diversion area, the waste heat recovery device and the diversion devices.

[0008] Furthermore, a tea dryer that utilizes the exhaust heat for recycling as described in the present invention is adopted. The feeding machine includes a frame, a feeding driving device, and a feeding conveyor belt. The frame is arranged at the front end of the drying box. The feeding conveyor belt includes two continuous chains, driving sprockets and driven sprockets for driving the two continuous chains to move reciprocally, and a feeding transport surface disposed between the two continuous chains. Among them, the chain includes an inclined lifting section and a horizontal conveying section. The lower end of the inclined lifting section is the feeding port. The inclined lifting section is installed in the frame, while the horizontal conveying section is installed in the drying box and is located directly above the conveying device. The feeding driving device is installed in the frame, and the feeding driving device is used to drive the driving sprocket in the feeding conveyor belt to move. And a feeding hopper corresponding to the feeding port is further provided at the top of the frame.

[0009] Furthermore, a tea dryer that utilizes the exhaust heat for recycling as described in the present invention is adopted. A feeding support bottom plate for supporting the feeding transport surface is further provided in the drying box, and a material dropping area is arranged on the feeding support bottom plate. The feeding transport surface includes a plurality of conveying flap plates. The plurality of conveying flap plates are arranged in sequence to form a feeding transport surface for transporting tea. One side of the conveying flap plate is rotatably connected to the chain, and the other side is a flipping side that is gravity-abutted against the feeding support bottom plate. The conveying flap plate loses the support of the feeding support bottom plate at the material dropping hole, so that the conveying flap plate rotates downward.

[0010] Furthermore, a tea dryer that utilizes the exhaust heat for recycling as described in the present invention is adopted. The feeding transport surface includes two transport surfaces that move around the driving sprocket and the driven sprocket. The two transport surfaces are arranged in an upper and lower stacked manner, and the feeding support bottom plate corresponds to the transport surface. Among them, the material dropping areas on the feeding support bottom plate corresponding to the transport surface are all arranged at the output ends of the transport surfaces. The conveying flap plate loses the support of the feeding support bottom plate at the material dropping hole, so that the conveying flap plate rotates downward, and the tea on the conveying flap plate falls from the upper transport surface to the lower transport surface.

[0011] Furthermore, a tea dryer that utilizes the exhaust heat for recycling as described in the present invention is adopted. A plurality of conveying devices are provided. The plurality of conveying devices are arranged in parallel in the box body and are located directly below the horizontal conveying section in the feeding conveyor belt. Each conveying device includes a conveying driving device and a conveying conveyor belt. The conveying conveyor belt includes two continuous chains, a driving sprocket and a driven sprocket for driving the two continuous chains to move reciprocally, and a conveying transport surface disposed between the two continuous chains. The conveying driving device is installed on the box body, and the conveying driving device is used to drive the driving sprocket in the conveying conveyor belt to move.

[0012] Furthermore, in a tea dryer that recycles exhaust waste heat as described in the present invention, a conveying support bottom plate for supporting the conveying transport surface is also provided in the drying box, and a dropping area is provided on the conveying support bottom plate, and the conveying transport surface includes a plurality of conveying flaps, and the plurality of conveying flaps are arranged in sequence to form a conveying transport surface for conveying tea leaves, one side of the conveying flap is rotatably connected to the chain, and the other side is a flipping side that is pressed against the conveying support bottom plate by gravity, and the conveying flap loses the support of the conveying support bottom plate at the dropping hole, thereby causing the conveying flap to rotate downward.

[0013] Furthermore, a tea dryer for recycling exhaust waste heat as described in the present invention is adopted, and three conveying devices are provided, and the three conveying devices are evenly arranged in parallel in the box; the conveying transport surface in each conveying device includes two transport surfaces that move around the driving sprocket and the driven sprocket, and the two transport surfaces are stacked up and down, and the conveying support bottom plate corresponds to the transport surface, wherein the dropping areas on the conveying support bottom plate corresponding to the transport surface are all arranged at the output end of the transport surface, and the conveying flap loses the support of the conveying support bottom plate at the dropping hole, thereby causing the conveying flap to rotate downward, and the tea leaves on the conveying flap fall from the transport surface of the upper layer to the transport surface of the lower layer.

[0014] Furthermore, a tea dryer for recycling exhaust waste heat as described in the present invention is adopted, and the waste heat recovery device includes a waste heat recovery unit, a waste heat conveying unit, a waste heat mixing unit and a waste heat distribution unit, the waste heat conveying unit is arranged at the top of the box body, and the waste heat recovery unit and the waste heat mixing unit are symmetrically arranged in front of and behind the waste heat conveying unit along the conveying direction of the conveying device, respectively, and the waste heat distribution unit is symmetrically arranged on both sides of the waste heat recovery unit and the waste heat mixing unit; a waste heat recovery port communicated with the drainage area is provided at the top of the box body, the waste heat recovery unit is communicated with the drainage area through the waste heat recovery port, and a diversion duct is provided between the waste heat distribution unit and the diversion device, and the waste heat distribution unit and the diversion device are communicated through the diversion duct; the hot air in the drying area forms a hot air circulation through the diversion area, the waste heat recovery unit, the waste heat conveying unit, the waste heat mixing unit, the waste heat distribution unit and the diversion device.

[0015] Furthermore, a tea dryer for recycling exhaust waste heat according to the present invention is adopted, wherein the waste heat recovery unit comprises a waste heat recovery box, a waste heat recovery device and a guide air bag, wherein the waste heat recovery box is arranged at the left position of the top of the box body, and the waste heat recovery device and the guide air bag are both arranged in the waste heat recovery box, wherein four guide air bags are provided, and two stacked guide air bags are respectively provided at the front and rear ends of the waste heat recovery device, and the four guide air bags are respectively communicated with the waste heat recovery device; four partition plates are provided in the waste heat recovery device, and the waste heat recovery device is divided from top to bottom into an upper waste heat recovery channel and a lower waste heat diversion channel by the four partition plates, and the waste heat recovery unit is communicated with the diversion area in the box body through the waste heat recovery channel in the waste heat recovery device and the waste heat recovery port on the top of the box body; the waste heat diversion channel is provided with four layers, and a series laminar circulation structure is formed between the waste heat recovery channel and the waste heat diversion channel through the guide air bags at both ends; The waste heat transport unit includes a first fan, a first steering wind bag and a first air duct, the first steering wind bag is communicated with a guide wind bag located at the rear end of the waste heat recovery box in the waste heat recovery unit, the first fan is installed on the top of the first steering wind bag, the input end of the first fan is communicated with the first steering wind bag, the first air duct is installed at the output end of the first fan, and the first fan is communicated with the waste heat mixing unit through the first air duct; The waste heat mixing unit includes a waste heat mixing box, a waste heat mixer and a mixing air bag, the waste heat mixing box is arranged at the right position of the top of the box body, the waste heat mixer and the mixing air bag are both arranged in the waste heat mixing box, wherein four mixing air bags are provided, and two stacked mixing air bags are respectively provided at the front and rear ends of the waste heat mixing box, and the four mixing air bags are respectively communicated with the waste heat mixer; four partition plates are provided in the waste heat mixer, and the waste heat mixer is divided into an upper air supply channel and a lower waste heat mixing channel from top to bottom by the four partition plates, and the waste heat mixing unit is communicated with the first air duct in the waste heat transport unit through the upper air supply channel; the waste heat mixing channel is provided with four layers, and a series laminar circulation structure is formed between the air supply channel and the four layers of the waste heat mixing channels through the mixing air bags; The waste heat distribution unit includes a waste heat heating box, a distribution air bag, a second fan, a second steering air bag, and a diversion air bag. The waste heat heating box is arranged at the middle position on the top of the box body. There are two distribution air bags and two second fans respectively. The two distribution air bags are symmetrically arranged on the left and right sides of the waste heat heating box, and an electric heater is also provided in the waste heat heating box. The two second fans are symmetrically installed on the top of the waste heat heating box. The input end of the second fan is communicated with the waste heat heating box. A second steering air bag is installed at the output end of the second fan. The distribution air bag is communicated with the waste heat heating box through the second steering air bag. There are four diversion air bags, and one diversion air bag is respectively arranged on the left and right sides of the waste heat recovery unit and the waste heat mixing unit. The diversion air bag is communicated with the distribution air bag, and the diversion air bag is communicated with the diversion device through a diversion pipeline.

[0016] Further, for a tea dryer with exhaust waste heat recycling using the present invention, the diversion device includes a diversion box and an air volume control plate arranged on the diversion box. The diversion box is arranged on the outer side surface of the box body. The number of the air volume control plates corresponds to the conveying device in the box body, and a diversion interface communicated with the drying area is arranged on the side surface of the box body. The diversion interface corresponds to the air volume control plate. Through the conduction between the air volume control plate on the diversion box and the diversion interface on the box body, under the action of the first fan and the second fan, the exhaust gas in the drying area forms a hot air cycle, realizing layered heating of the drying area in the box body, and a support seat is also arranged at the bottom of the box body.

[0017] For a tea dryer with exhaust waste heat recycling using the present invention, compared with the prior art, its beneficial effects are as follows: By using the waste heat recovery device arranged on the top of the box body and the diversion device arranged on the side surface of the box body, under the action of the first fan and the second fan, the exhaust waste heat in the drying area forms a hot air cycle, realizing the recycling of exhaust waste heat. At the same time, by using the electric heater arranged in the waste heat heating box, the recovered hot air can be heated, and finally returned to the box body through the diversion device, which can realize layered heating of the drying area in the box body, effectively reducing the temperature difference between the upper and lower layers in the drying area, improving the quality of tea while reducing energy consumption. It can be seen that by using the tea dryer of the present invention, through recycling the exhaust waste heat, the utilization rate of hot air is greatly improved, and heat energy loss is reduced. At the same time, by returning the recovered exhaust waste heat to the box body after heating, not only can layered heating be realized, but also the temperature difference between the upper and lower layers in the drying area can be effectively reduced, improving the quality of tea while reducing energy consumption. Its overall structure is simple, the operation is convenient, the market competitiveness is enhanced, and it is suitable for popularization and application. Description of the Drawings

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of the present invention; Figure 3 is Figure 2 the top view of Figure 4 is Figure 2 the side view of Figure 5 is a three-dimensional structural schematic diagram of the waste heat recovery device and the diversion device described in the present invention; Figure 6 is a structural schematic diagram of the waste heat recovery device and the diversion device described in the present invention; Figure 7 is Figure 6 the top view of Figure 8 is Figure 6 the side view of Figure 9 is a schematic diagram of the tea leaf conveying principle described in the present invention.

[0020] As shown in the figure: 1 - feeding machine, 11 - frame, 12 - feeding driving device, 13 - feeding conveyor belt, 14 - feeding hopper, 15 - feeding support bottom plate, 2 - drying box, 21 - box body, 22 - partition board, 23 - diversion area, 24 - drying area, 25 - support seat, 3 - conveying device, 31 - conveying driving device, 32 - conveying conveyor belt, 33 - conveying support bottom plate, 4 - waste heat recovery device, 41 - waste heat recovery unit, 411 - waste heat recovery box, 412 - waste heat recovery device, 413 - guiding air bag, 414 - waste heat recovery channel, 415 - waste heat diversion channel, 42 - waste heat conveying unit, 421 - first fan, 422 - first turning air bag, 423 - first air duct, 43 - waste heat mixing unit, 431 - waste heat mixing box, 432 - waste heat mixer, 433 - mixing air bag, 434 - air supply channel, 435 - waste heat mixing channel, 44 - waste heat distribution unit, 441 - waste heat heating box, 442 - distribution air bag, 443 - second fan, 444 - second turning air bag, 445 - diversion air bag, 5 - diversion device, 6 - diversion pipeline. Specific Embodiments

[0021] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have any substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. cited in this specification are also only for the convenience of narration and understanding, and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "provided with" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] It should be noted that the term "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or device. Embodiment 1

[0025] As Figures 1 to 8 shown, this embodiment provides a tea dryer for recycling exhaust heat, which includes a feeding machine 1 and a dryer. The dryer includes a drying box 2, a conveying device 3 disposed in the drying box 2 for conveying tea, and a heat supply device for supplying heat to the drying box 2. The drying box 2 includes a box body 21 and a partition 22 disposed in the box body 21. The box body 21 is separated into a diversion area 23 and a drying area 24 by the partition 22. A waste heat recovery device 4 communicating with the diversion area 23 is further provided at the top of the box body 21, and diversion devices 5 symmetrically distributed are provided on the side surface of the box body 21. The diversion devices 5 communicate with the waste heat recovery device 4 and the drying area 24. The hot air in the drying area 24 forms a hot air cycle through the diversion area 23, the waste heat recovery device 4, and the diversion devices 5.

[0026] Furthermore, a tea dryer that recycles exhaust heat is adopted according to this embodiment. The feeding machine 1 includes a machine frame 11, a feeding driving device 12, and a feeding conveyor belt 13. The machine frame 11 is arranged at the front end of the drying box 2. The feeding conveyor belt 13 includes two continuous chains, a driving sprocket and a driven sprocket for driving the two continuous chains to move reciprocally, and a feeding transport surface arranged between the two continuous chains. Among them, the chain includes an inclined lifting section and a horizontal conveying section. The lower end of the inclined lifting section is the feeding port. The inclined lifting section is installed in the machine frame 11, and the horizontal conveying section is installed in the drying box 2 and is located directly above the conveying device 3. The feeding driving device 12 is installed in the machine frame 11. The feeding driving device 12 is used to drive the driving sprocket in the feeding conveyor belt 13 to move. And a feeding hopper 14 corresponding to the feeding port is further arranged at the top of the machine frame 11. At the same time, a feeding support bottom plate 15 for supporting the feeding transport surface is further arranged in the drying box 2, and a blanking area is arranged on the feeding support bottom plate 15. The feeding transport surface includes a plurality of conveying flap plates. The plurality of conveying flap plates are arranged in sequence to form a feeding transport surface for transporting tea. One side of the conveying flap plate is rotatably connected to the chain, and the other side is a flipping side that is gravity-abutted against the feeding support bottom plate 15. The conveying flap plate loses the support of the feeding support bottom plate 15 at the blanking hole, so that the conveying flap plate rotates downward. And the feeding transport surface includes two transport surfaces that move around the driving sprocket and the driven sprocket. The two transport surfaces are arranged in an upper and lower stacked manner. The feeding support bottom plate 15 corresponds to the transport surface. Among them, the blanking areas on the feeding support bottom plate 15 corresponding to the transport surface are all arranged at the output ends of the transport surface. The conveying flap plate loses the support of the feeding support bottom plate 15 at the blanking hole, so that the conveying flap plate rotates downward, and the tea on the conveying flap plate falls from the upper transport surface to the lower transport surface.

[0027] Furthermore, a tea dryer for recycling exhaust waste heat as described in this embodiment is adopted, wherein a plurality of conveying devices 3 are provided, and the plurality of conveying devices 3 are arranged in parallel in the box body 21 and are located directly below the horizontal conveying section in the loading conveyor belt 13, and each of the conveying devices 3 includes a conveying drive device 31 and a conveying conveyor belt 32, and the conveying conveyor belt 32 includes two continuous chains, an active sprocket and a driven sprocket for driving the two continuous chains to move back and forth, and a conveying transport surface arranged between the two continuous chains; the conveying drive device 31 is installed on the box body 21, and the conveying drive device 31 is used to drive the active sprocket in the conveying conveyor belt 32 to move. At the same time, a conveying support bottom plate 33 for supporting the conveying and transporting surface is also provided in the drying box 2, and a drop area is provided on the conveying support bottom plate 33, and the conveying and transporting surface includes a plurality of conveying flaps, and the plurality of conveying flaps are arranged in sequence to form a conveying and transporting surface for conveying tea leaves, one side of the conveying flap is rotatably connected to the chain, and the other side is a flipping side that is pressed against the conveying support bottom plate by gravity, and the conveying flap loses the support of the conveying support bottom plate 33 at the drop hole, thereby causing the conveying flap to rotate downward.

[0028] Furthermore, a tea dryer for recycling exhaust waste heat as described in this embodiment is adopted, the waste heat recovery device 4 includes a waste heat recovery unit 41, a waste heat transport unit 42, a waste heat mixing unit 43 and a waste heat distribution unit 44, the waste heat transport unit 42 is arranged on the top of the box body 21, the waste heat recovery unit 41 and the waste heat mixing unit 43 are symmetrically arranged in front of and behind the waste heat transport unit 42 along the transport direction of the conveying device 3, and the waste heat distribution unit 44 is symmetrically arranged between the waste heat recovery unit 41 and On both sides of the waste heat mixing unit 43; a waste heat recovery port connected to the drainage area 23 is provided on the top of the box body 21, and the waste heat recovery unit 41 is connected to the drainage area 23 through the waste heat recovery port, and a diversion pipe is provided between the waste heat distribution unit 44 and the diversion device 5, and the waste heat distribution unit 44 and the diversion device 5 are connected through the diversion pipe; the hot air in the drying area 24 forms a hot air circulation through the diversion area 23, the waste heat recovery unit 41, the waste heat transport unit 42, the waste heat mixing unit 43, the waste heat distribution unit 44 and the diversion device 5.

[0029] Furthermore, a tea drying machine for recycling waste heat from exhaust gas as described in this embodiment is adopted, wherein the waste heat recovery unit 41 includes a waste heat recovery box 411, a waste heat recovery device 412 and a guide air bag 413, wherein the waste heat recovery box 411 is arranged at the left side of the top of the box body 21, and the waste heat recovery device 412 and the guide air bag 413 are both arranged in the waste heat recovery box 411, wherein the guide air bag 413 is provided with four, and two stacked guide air bags 413 are respectively provided at the front and rear ends of the waste heat recovery device 412, and the four guide air bags 413 are respectively connected to the waste heat recovery device 412 and the guide air bag 413. The waste heat recovery device 412 is connected; four partition plates are arranged in the waste heat recovery device 412, and the waste heat recovery device 412 is divided from top to bottom into a waste heat recovery channel 414 in the upper layer and a waste heat drainage channel 415 in the lower layer by the four partition plates. The waste heat recovery unit 41 is connected to the drainage area 23 in the box body 21 through the waste heat recovery channel 414 in the waste heat recovery device 412 and the waste heat recovery port on the top of the box body 21; the waste heat drainage channel 415 is provided with four layers, and a series laminar circulation structure is formed between the waste heat recovery channel 414 and the waste heat drainage channel 415 through the guide air bags 413 at both ends; The waste heat transport unit 42 includes a first fan 421, a first turning wind bag 422 and a first air duct 423. The first turning wind bag 422 is communicated with the guide wind bag 413 located at the rear end of the waste heat recovery box 411 in the waste heat recovery unit 41. The first fan 421 is installed on the top of the first turning wind bag 422. The input end of the first fan 421 is communicated with the first turning wind bag 422. The first air duct 423 is installed at the output end of the first fan 421. The first fan 421 is communicated with the waste heat mixing unit 43 through the first air duct 423. The waste heat mixing unit 43 includes a waste heat mixing box 431, a waste heat mixer 432 and a mixing air bag 433. The waste heat mixing box 431 is arranged at the right position of the top of the box body 21. The waste heat mixer 432 and the mixing air bag 433 are both arranged in the waste heat mixing box 431. There are four mixing air bags 433. Two stacked mixing air bags 433 are respectively arranged at the front and rear ends of the waste heat mixing box 431. The four mixing air bags 432 are respectively connected to the waste heat mixer 432. The waste heat mixer 432 is provided with four partition plates, and the waste heat mixer 432 is divided into an upper air supply channel 434 and a lower waste heat mixing channel 435 from top to bottom by the four partition plates. The waste heat mixing unit 43 is connected to the first air duct 423 in the waste heat transport unit 42 through the upper air supply channel 433; the waste heat mixing channel 435 is provided with four layers, and a series laminar circulation structure is formed between the air supply channel 434 and the four layers of the waste heat mixing channels through the mixing air bag 433; The waste heat distribution unit 44 includes a waste heat heating box 441, a distribution air bag 442, a second fan 443, a second steering air bag 444 and a diversion air bag 445. The waste heat heating box 441 is arranged at the middle position on the top of the box body 21. There are two distribution air bags 442 and two second fans 443 respectively. The two distribution air bags 442 are symmetrically arranged on the left and right sides of the waste heat heating box 441, and an electric heater 446 is also arranged in the waste heat heating box 441. The two second fans 443 are symmetrically installed on the top of the waste heat heating box 441. The input end of the second fan 443 is communicated with the waste heat heating box 441. A second steering air bag 444 is installed at the output end of the second fan 443. The distribution air bag 442 is communicated with the waste heat heating box 441 through the second steering air bag 444. There are four diversion air bags 445. One diversion air bag 445 is respectively arranged on the left and right sides of the waste heat recovery unit 41 and the waste heat mixing unit 43. The diversion air bag 445 is communicated with the distribution air bag 442. The diversion air bag 445 is communicated with the diversion device 5 through a diversion pipeline 6.

[0030] Furthermore, for a tea dryer with exhaust waste heat recycling using the embodiment described above, the diversion device 5 includes a diversion box 51 and an air volume control plate 52 arranged on the diversion box 51. The diversion box 51 is arranged on the outer side surface of the box body 21. The number of the air volume control plates 52 corresponds to the conveyor device 3 in the box body 21. A diversion interface 53 communicated with the drying area 24 is arranged on the side surface of the box body 21, and the diversion interface 53 corresponds to the air volume control plate 52. Through the conduction between the air volume control plate 52 on the diversion box 51 and the diversion interface 53 on the box body 21, under the action of the first fan 421 and the second fan 443, the exhaust gas in the drying area 24 forms a hot air cycle, realizing layered heating of the drying area 24 in the box body 21.

[0031] In the specific application process, a tea dryer that utilizes the exhaust heat for recycling as described in this embodiment is adopted. There are three conveying devices 3, and the three conveying devices 3 are evenly arranged in a parallel state within the box body 21. The conveying and transporting surface in each conveying device 3 includes two transporting surfaces that move around the driving sprocket and the driven sprocket. The two transporting surfaces are stacked one above the other, and the conveying support bottom plate 33 corresponds to the transporting surface. Among them, the material dropping areas on the conveying support bottom plate 33 corresponding to the transporting surface are all arranged at the output end of the transporting surface. The conveying flap loses the support of the conveying support bottom plate 33 at the material dropping hole, so that the conveying flap rotates downward, and the tea leaves on the conveying flap fall from the upper transporting surface to the lower transporting surface. By adopting three conveying devices 3 for drying treatment, the tea leaves can meet the drying treatment requirements, which can not only improve the processing efficiency but also improve the drying quality. The specific drying temperature can be operated and controlled by selecting the corresponding temperature according to different types of tea. Embodiment 2

[0032] On the basis of Embodiment 1, in order to facilitate the transportation of the tea leaves that have been dried in the box body 21 to the next process for treatment and achieve automatic control, a tea dryer that utilizes the exhaust heat for recycling as described in this embodiment is adopted. A support seat 25 is further provided at the bottom of the box body 21, and the support seat 25 is used to raise the height of the box body 21, so as to facilitate the transportation of the tea leaves in the box body 21 to the next processing step through the conveying device.

[0033] As Figure 9 As shown, for a tea dryer that utilizes the exhaust heat for recycling as described in the present invention, its working principle is as follows: The tea leaves to be dried are put onto the feeding conveyor belt 13 in the feeder 1 through the feeding hopper 14 and are conveyed to the drying area 24 in the drying box 2 by the feeding conveyor belt 13. When reaching the material dropping hole, since there is a material dropping area in the feeding support bottom plate 15 and the material dropping areas are all arranged at the output end of the transporting surface, when the conveying flap loses the support of the feeding support bottom plate 15 at the material dropping hole, the conveying flap rotates downward, and the tea leaves on the conveying flap fall from the upper transporting surface to the lower transporting surface, and the tea leaves thus fall to the lower layer. The tea leaves repeat the above conveying process in the lower layer to achieve continuous conveying, and the purpose of drying treatment is achieved during the conveying process.

[0034] The tea leaves transported by the feeding conveyor belt 13 fall onto the conveyor belt 32 in the conveyor device 3. Since a conveyor support bottom plate 33 for supporting the conveyor transport surface is also provided in the drying box 2, and a drop zone is provided on the conveyor support bottom plate 33, when the conveyor flap loses the support of the conveyor support bottom plate 33 at the drop hole, the conveyor flap rotates downward, and the tea leaves on the conveyor flap fall from the upper transport surface to the lower transport surface, and the tea leaves fall to the lower layer. The tea leaves repeat the above conveying process in the lower layer to achieve continuous conveying. Since three conveyor devices 3 are provided in the drying box 2, the tea leaves are transported back and forth once on a transport layer, so that six conveyings can be achieved. Compared with the common chain drive or belt drive method, the conveyor device 3 can dry the tea leaves during the conveying process by increasing the travel of the tea leaves without increasing the volume, which can not only reduce the drying time of the tea leaves, but also help to improve the drying effect, thereby improving the quality of the tea leaves.

[0035] In addition, since a waste heat recovery device 4 and a guide device 5 are also provided, the waste heat recovery device 4 includes a waste heat recovery unit 41, a waste heat transport unit 42, a waste heat mixing unit 43 and a waste heat distribution unit 44, and a guide pipe is provided between the waste heat distribution unit 44 and the guide device 5, and the waste heat distribution unit 44 and the guide device 5 are communicated with each other through the guide pipe; in this way, the hot air in the drying area 24 can form a hot air circulation through the guide area 23, the waste heat recovery unit 41, the waste heat transport unit 42, the waste heat mixing unit 43, the waste heat distribution unit 44 and the guide device 5, thereby realizing the recycling of exhaust waste heat.

[0036] It can be seen that, by using the tea dryer described in the present invention, utilizing the waste heat recovery device 4 arranged on the top of the box body 21, and the guide device 5 arranged on the side of the box body 21, under the action of the first fan 421 and the second fan 443, the exhaust waste heat in the drying area 24 forms a hot air circulation, thereby realizing the recycling of exhaust waste heat; at the same time, utilizing the electric heater 446 arranged in the waste heat heating box 441, the recovered hot air can be heated, and finally returned to the box body 21 through the guide device 5, so as to realize stratified heating of the drying area 24 in the box body 21, thereby effectively reducing the temperature difference between the upper and lower layers in the drying area 24, thereby improving the quality of tea and reducing energy loss.

[0037] In summary, the tea drying machine of the present invention can greatly improve the utilization rate of hot air and reduce heat energy loss by recycling the exhaust waste heat. At the same time, by returning the recovered exhaust waste heat to the box body 21 after heating, it can not only realize stratified heating, but also effectively reduce the temperature difference between the upper and lower layers in the drying area 24, thereby improving the quality of tea and reducing energy loss. Its overall structure is simple, easy to operate, and has enhanced market competitiveness, making it suitable for promotion and application.

[0038] The tea dryer of the present invention is adopted, wherein the feeding driving device 12, the feeding conveyor belt 13, the conveying driving device 31, the conveying conveyor belt 32, the first blower 421 and the second blower 443 are all well-known technical solutions in the prior art, and thus are not described in detail in this specification. In addition, for the convenience of description, Figure 2 the arrow in indicates the conveying direction of the exhaust waste heat, while Figure 9 the arrow in indicates the conveying direction of the tea. Other details not elaborated in the present invention are all conventional techniques well-known to those skilled in the art.

[0039] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments. The above description is only the preferred embodiment of the present invention and does not limit the present invention. Any minor modifications, equivalent replacements and improvements made according to the technical solutions of the present invention shall be included in the protection scope of the technical solutions of the present invention.

Claims

1. A tea drying machine for recycling exhaust waste heat, comprising a feeder (1) and a drying machine, wherein the drying machine comprises a drying box (2), a conveying device (3) arranged in the drying box (2) for conveying tea leaves, and a heating device for providing heat to the drying box (2), characterized in that: The drying box (2) comprises a box body (21) and a partition (22) arranged in the box body (21); the box body (21) is divided into a drainage area (23) and a drying area (24) by the partition (22); a waste heat recovery device (4) communicating with the drainage area (23) is also arranged on the top of the box body (21); and a symmetrically distributed flow guide device (5) is arranged on the side of the box body (21); the flow guide device (5) is communicated with the waste heat recovery device (4) and the drying area (24); and the hot air in the drying area (24) forms a hot air circulation through the drainage area (23), the waste heat recovery device (4) and the flow guide device (5).

2. The tea drying machine for recycling exhaust waste heat according to claim 1 is characterized in that: The feeder (1) comprises a frame (11), a feed drive device (12) and a feed conveyor belt (13), wherein the frame (11) is arranged at the front end of the drying box (2), the feed conveyor belt (13) comprises two continuous chains, a driving sprocket and a driven sprocket for driving the two continuous chains to move back and forth, and a feed transport surface arranged between the two continuous chains; wherein the chain comprises an inclined lifting section and a horizontal conveying section, the lower end of the inclined lifting section is a feed inlet, the inclined lifting section is installed in the frame (11), and the horizontal conveying section is installed in the drying box (2) and is located directly above the conveying device (3); the feed drive device (12) is installed in the frame (11), and the feed drive device (12) is used to drive the drive sprocket in the feed conveyor belt (13) to move; and a feed hopper (14) corresponding to the feed inlet is also provided at the top of the frame (11).

3. The tea drying machine for recycling exhaust waste heat according to claim 2 is characterized in that: A loading support bottom plate (15) for supporting the loading transport surface is also provided in the drying box (2), and a drop zone is provided on the loading support bottom plate (15). The loading transport surface includes a plurality of conveying flaps, and the plurality of conveying flaps are arranged in sequence to form a loading transport surface for conveying tea leaves. One side of the conveying flap is rotatably connected to the chain, and the other side is a flip side that is pressed against the loading support bottom plate (15) by gravity. The conveying flap loses the support of the loading support bottom plate (15) at the drop hole, thereby causing the conveying flap to rotate downward.

4. The tea drying machine for recycling exhaust waste heat according to claim 3 is characterized in that: The loading transport surface comprises two transport surfaces that move around a driving sprocket and a driven sprocket, the two transport surfaces are stacked up and down, and the loading support bottom plate (15) corresponds to the transport surface, wherein the drop areas on the loading support bottom plate (15) corresponding to the transport surface are all arranged at the output end of the transport surface; the conveying flap loses the support of the loading support bottom plate (15) at the drop hole, thereby causing the conveying flap to rotate downward, and the tea leaves on the conveying flap fall from the upper transport surface to the lower transport surface.

5. The tea drying machine for recycling exhaust waste heat according to claim 2 is characterized in that: The conveying device (3) is provided with a plurality of conveying devices (3), which are arranged in parallel in the box body (21) and are located directly below the horizontal conveying section in the loading conveyor belt (13). Each of the conveying devices (3) includes a conveying drive device (31) and a conveying conveyor belt (32). The conveying conveyor belt (32) includes two continuous chains, a driving sprocket and a driven sprocket for driving the two continuous chains to move back and forth, and a conveying transport surface arranged between the two continuous chains. The conveying drive device (31) is installed on the box body (21), and the conveying drive device (31) is used to drive the driving sprocket in the conveying conveyor belt (32) to move.

6. The tea drying machine for recycling exhaust waste heat according to claim 5 is characterized in that: A conveying support bottom plate (33) for supporting the conveying transport surface is also provided in the drying box (2), and a material dropping area is provided on the conveying support bottom plate (33). The conveying transport surface includes a plurality of conveying flaps, and the plurality of conveying flaps are arranged in sequence to form a conveying transport surface for conveying tea leaves. One side of the conveying flap is rotatably connected to the chain, and the other side is a flip side that is pressed against the conveying support bottom plate by gravity. The conveying flap loses the support of the conveying support bottom plate (33) at the material dropping hole, thereby causing the conveying flap to rotate downward.

7. The tea drying machine for recycling exhaust waste heat according to claim 6 is characterized in that: The conveying devices (3) are provided with three conveying devices (3), which are evenly arranged in parallel in the box body (21); the conveying transport surface in each conveying device (3) includes two transport surfaces that move around a driving sprocket and a driven sprocket, the two transport surfaces are stacked up and down, and the conveying support bottom plate (33) corresponds to the transport surface, wherein the drop area on the conveying support bottom plate (33) corresponding to the transport surface is arranged at the output end of the transport surface, and the conveying flap loses the support of the conveying support bottom plate (33) at the drop hole, thereby causing the conveying flap to rotate downward, and the tea leaves on the conveying flap fall from the upper transport surface to the lower transport surface.

8. The tea drying machine for recycling exhaust waste heat according to claim 1 is characterized in that: The waste heat recovery device (4) comprises a waste heat recovery unit (41), a waste heat transport unit (42), a waste heat mixing unit (43) and a waste heat distribution unit (44); the waste heat transport unit (42) is arranged on the top of the box body (21); the waste heat recovery unit (41) and the waste heat mixing unit (43) are symmetrically arranged in front of and behind the waste heat transport unit (42) along the transport direction of the conveying device (3); and the waste heat distribution unit (44) is symmetrically arranged on both sides of the waste heat recovery unit (41) and the waste heat mixing unit (43); ) is provided at the top of the drying area (24), the waste heat recovery port being communicated with the drainage area (23); the waste heat recovery unit (41) is communicated with the drainage area (23) through the waste heat recovery port; and a guide pipe (6) is provided between the waste heat distribution unit (44) and the guide device (5); the waste heat distribution unit (44) and the guide device (5) are communicated with each other through the guide pipe (6); the hot air in the drying area (24) forms a hot air circulation through the drainage area (23), the waste heat recovery unit (41), the waste heat transport unit (42), the waste heat mixing unit (43), the waste heat distribution unit (44) and the guide device (5).

9. The tea drying machine for recycling exhaust waste heat according to claim 8, characterized in that: The waste heat recovery unit (41) comprises a waste heat recovery box (411), a waste heat recovery device (412) and a guide air bag (413); the waste heat recovery box (411) is arranged at the left side of the top of the box body (21); the waste heat recovery device (412) and the guide air bag (413) are both arranged in the waste heat recovery box (411); four guide air bags (413) are provided, two stacked guide air bags (413) are provided at the front and rear ends of the waste heat recovery device (412), and the four guide air bags (413) are respectively communicated with the waste heat recovery device (412); (412) is provided with four partition plates, the waste heat recovery device (412) is divided from top to bottom into a waste heat recovery channel (414) in the upper layer and a waste heat drainage channel (415) in the lower layer by the four partition plates, the waste heat recovery unit (41) is connected to the drainage area (23) in the box body (21) through the waste heat recovery channel (414) in the waste heat recovery device (412) and the waste heat recovery port on the top of the box body (21); the waste heat drainage channel (415) is provided with four layers, and a series laminar circulation structure is formed between the waste heat recovery channel (414) and the waste heat drainage channel (415) through the guide air bags (413) at both ends; The waste heat transport unit (42) comprises a first fan (421), a first turning wind bag (422) and a first air duct (423); the first turning wind bag (422) is communicated with a guide wind bag (413) located at the rear end of a waste heat recovery box (411) in the waste heat recovery unit (41); the first fan (421) is installed on the top of the first turning wind bag (422); the input end of the first fan (421) is communicated with the first turning wind bag (422); the first air duct (423) is installed at the output end of the first fan (421); the first fan (421) is communicated with the waste heat mixing unit (43) through the first air duct (423); The waste heat mixing unit (43) comprises a waste heat mixing box (431), a waste heat mixer (432) and a mixing air bag (433); the waste heat mixing box (431) is arranged at the right position of the top of the box body (21); the waste heat mixer (432) and the mixing air bag (433) are both arranged in the waste heat mixing box (431); four mixing air bags (433) are provided, two stacked mixing air bags (433) are provided at the front and rear ends of the waste heat mixing box (431), and the four mixing air bags (432) are respectively connected to the waste heat mixer (432). 2) are connected; four partition plates are provided in the waste heat mixer (432); the waste heat mixer (432) is divided from top to bottom into an upper air supply channel (434) and a lower waste heat mixing channel (435) by the four partition plates; the waste heat mixing unit (43) is connected to the first air duct (423) in the waste heat transport unit (42) through the upper air supply channel (433); the waste heat mixing channel (435) is provided with four layers; the air supply channel (434) and the four layers of the waste heat mixing channels are connected by mixing air bags (433) to form a series laminar circulation structure; The waste heat distribution unit (44) comprises a waste heat heating box (441), a distribution air bag (442), a second fan (443), a second steering air bag (444) and a guide air bag (445); the waste heat heating box (441) is arranged at the middle position of the top of the box body (21); two distribution air bags (442) and two second fans (443) are respectively provided; the two distribution air bags (442) are symmetrically arranged on the left and right sides of the waste heat heating box (441); an electric heater (446) is also provided in the waste heat heating box (441); the two second fans (443) are symmetrically installed on the waste heat heating box (441); 41), the input end of the second fan (443) is communicated with the waste heat heating box (441), a second turning wind bag (444) is installed at the output end of the second fan (443), the distribution wind bag (442) is communicated with the waste heat heating box (441) through the second turning wind bag (444), four guide wind bags (445) are provided, and a guide wind bag (445) is provided on the left and right sides of the waste heat recovery unit (41) and the waste heat mixing unit (43), respectively, the guide wind bag (445) is communicated with the distribution wind bag (442), and the guide wind bag (445) is communicated with the guide device (5) through a guide pipe (6).

10. The tea drying machine for recycling exhaust waste heat according to claim 9, characterized in that: The flow guide device (5) comprises a flow guide box (51) and an air volume control plate (52) arranged on the flow guide box (51); the flow guide box (51) is arranged on the outer surface of the box body (21); the number of the air volume control plates (52) corresponds to the number of the conveying devices (3) in the box body (21); and a flow guide interface (53) communicating with the drying area (24) is arranged on the side of the box body (21); the flow guide interface (53) corresponds to the air volume control plate (52); the air volume control plate (52) on the flow guide box (51) is connected with the flow guide interface (53) on the box body (21), and under the action of the first fan (421) and the second fan (443), the exhaust gas in the drying area (24) forms a hot air circulation, so as to realize the stratified heat supply to the drying area (24) in the box body (21); and a support seat (25) is also arranged at the bottom of the box body (21).

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