CN113892661A

CN113892661A - Drying device and application thereof

Info

Publication number: CN113892661A
Application number: CN202111162280.2A
Authority: CN
Inventors: 崇峻; 田绍华; 吕传海; 张光辉; 刘勇; 田静
Original assignee: Jinan Huaqing Agricultural Machinery Technology Co ltd
Current assignee: Jinan Huaqing Agricultural Machinery Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-01-07
Anticipated expiration: 2041-09-30
Also published as: CN113892661B

Abstract

The invention relates to a drying device and application thereof, belongs to the technical field of drying equipment, solves the problem of low thermal efficiency in the prior art, and has the advantages of improving the thermal efficiency and uniformly drying and heating.

Description

Drying device and application thereof

Technical Field

The invention belongs to the technical field of drying equipment, and particularly relates to a drying device and application thereof.

Background

Garlic and some fruits and vegetables are frequently required to be cleaned and dried in the processing process, but the garlic is mainly dried by manual airing and a dryer at present, the manual airing speed is low, the labor intensity is high, the garlic is not suitable for industrial processing production, and the dryer is used for drying, so that the drying speed of the garlic is improved to a certain extent.

The traditional drying method of the dryer is that a heat source is generated by burning coal or coal gas, and a fan is used for blowing heat into the drying oven, so that the drying purpose is achieved, but the drying method has the following problems:

the heat for drying is blown in by a fan, so that the heat efficiency is low;

the material is not uniformly laid, so that the drying and heating are not uniform; in addition, the bearing and the net chain in the dryer are easy to damage, and need to be replaced and maintained frequently; and meanwhile, the drying box also has the problem of serious electric energy loss.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a drying device, which improves the drying efficiency by adopting a natural gas direct combustion technology, improves the structure of the drying device, ensures that a dryer is not easy to damage and has long service life.

The embodiment of the invention provides a drying device which comprises a rack, wherein the rack supports a combustion assembly and a plurality of material conveying mechanisms, the combustion assembly is positioned below the material conveying mechanisms and can combust combustible gas, the combustion assembly is provided with a plurality of holes for radiating heat to dry food, a scraping piece is arranged on the rack and is arranged above the material conveying mechanisms, and a set distance is reserved between the scraping piece and the material conveying mechanisms or the scraping piece is contacted with the material conveying mechanisms.

When the drying device is provided with the material conveying mechanisms, the distance is set at the interval between every two adjacent material conveying mechanisms, the two adjacent material conveying mechanisms are arranged in a staggered mode, the moving directions of the two adjacent material conveying mechanisms are opposite, the materials are conveyed from top to bottom along the S-shaped material conveying mechanisms, the moving path and time of the materials in the drying box are effectively increased, and the drying device is helpful for drying the materials.

According to the drying device, the material conveying mechanism comprises the driving roller and the driven roller which are supported by the rack, the driving roller and the driven roller support the net chain type conveying belt, the driving roller is provided with at least two concave wheels to be matched with the net chain type conveying belt, and the concave wheels are matched with the net chain type conveying belt, so that the utilization efficiency of electric energy is improved, and the occupied space of the power device of the equipment is reduced.

According to the drying device, the plurality of supporting wheels are further arranged between the driving roller and the driven roller and movably mounted on the frame, the distance between every two adjacent supporting wheels is set at intervals, the mesh chain can be prevented from sagging, and the friction force generated when the mesh chain conveying belt runs is reduced due to the design of the supporting wheels, so that the consumption of electric energy is reduced.

According to the drying device, a plurality of scraping pieces are arranged above the material conveying mechanism, and a set distance is arranged between every two adjacent scraping pieces above each material conveying mechanism;

scrape the material piece and include the multirow and scrape the flitch, scrape the flitch and contact with material transport mechanism surface, scrape the flitch dislocation arrangement of two adjacent rows of material piece, the one end of scraping the flitch pass through the support with the frame is connected to stir the material, scrape the flitch and can set up vertically or slope and scrape the flitch along material transport mechanism's width direction sets up.

According to the drying device, the combustion assembly is arranged at the bottom of the rack; the combustion assembly comprises a plurality of combustion pipes, the distance is set at intervals between two adjacent sections of combustion pipes, each section of combustion pipe is connected with the combustion main pipe respectively, the combustion main pipe or the combustion pipes are provided with ignition parts, one end of the combustion main pipe is provided with a combustible gas interface, and a flange plate is arranged between the combustible gas interface and the combustion main pipe, so that the tightness of the combustible gas introduced into the combustion main pipe is ensured, and the safety production is facilitated.

According to the drying device, in order to avoid blocking of the combustion assembly by powder of materials, the protective cover is installed above the combustion assembly and connected with the rack, and a set distance is reserved between the protective cover and the combustion assembly.

The drying device further comprises a drying box, the drying box is arranged on the outer side of the rack, the drying box is provided with a material feeding hole and a material discharging hole, the material feeding hole is located above one end of at least one material conveying mechanism, and the material discharging hole is located at one end of at least one material conveying mechanism;

the drying box is also provided with a powder discharge port at one end of at least one material conveying mechanism below the material discharge port, the material conveying mechanism opposite to the powder discharge port is different from other material conveying mechanisms, the material conveying mechanism can realize the conveying of powder, and the powder discharge port is arranged lower than the material discharge port so that the powder is discharged and cannot leak to a combustion assembly at the bottom to cause fire;

the one end of the material conveying mechanism close to the material discharge hole or the powder discharge hole exceeds the frame, so that the corresponding material conveying mechanism is arranged close to the drying box, and the material or powder is guaranteed to be conveyed out.

According to the drying device, the top of the drying box is provided with the plurality of moisture discharge ports, and the moisture discharge ports are internally provided with the fans;

the drying box is internally wrapped by the insulation board arranged on the rack and used for supporting the bearing of the material conveying mechanism, the bearing is installed on the outer side of the insulation board and used for guaranteeing the service life of the bearing.

In a second aspect, the invention also provides an application of the drying device, which is applied to drying garlic slices or fruit and vegetable slices.

The invention has the following beneficial effects:

1) the invention adopts the mode of burning combustible gas at the bottom of the drying device to obtain the heat source, the burning component is provided with the opening, the heat generated by the burning of the combustible gas flows upwards through the opening, so that the heat generated by the burning of the combustible gas is directly utilized to dry the materials, and the heat conversion efficiency is high.

2) According to the invention, through the arrangement of the scraper plate, the scraper plate is contacted with the surface of the material conveying mechanism, so that the materials such as garlic slices or fruits and vegetables are ensured not to be adhered to the net chain type conveying belt; and the scrapers are distributed in a staggered manner, so that the materials can be stirred, the garlic slices or the fruits and vegetables can be uniformly heated, and the drying quality of the garlic slices or the fruits and vegetables is improved.

3) According to the invention, the protective cover is additionally arranged on the combustion assembly, so that the garlic flakes or fruit and vegetable powder is effectively prevented from blocking the combustion pipe; set up the ring flange at combustion manifold entrance, seal the setting with the natural gas entry, guaranteed the operation safety of stoving case.

4) The bearing is arranged on the outer side of the heat insulation plate, and the bearing is arranged outside the heat insulation plate, so that the high-temperature and high-humidity environment is avoided, and the service life of the bearing is obviously prolonged by the high-temperature bearing protection technology.

5) The concave wheel matched with the net chain type conveying belt is used for replacing the traditional transmission mode of a conveying belt chain and a chain wheel, the transmission mode improves the utilization efficiency of electric energy, and the occupied space of a power device of the equipment is also reduced.

6) According to the invention, the support wheel is arranged below the net chain type conveyer belt, so that the net chain can be prevented from sagging, and the design of the support wheel reduces the friction force of the net chain conveyer belt during operation, thereby reducing the consumption of electric energy and achieving the purpose of saving electric energy.

Drawings

Fig. 1 is a front view of a drying apparatus according to an embodiment of the present invention;

fig. 2 is a left side structure diagram of the drying device provided in the embodiment of the present invention;

fig. 3 is a right side structural view of the drying device provided in the embodiment of the present invention;

fig. 4 is an internal structure view of the drying apparatus provided in the embodiment of the present invention;

FIG. 5 is a schematic view of a natural gas port and a combustion manifold connected by a flange according to an embodiment of the present invention;

FIG. 6 is a schematic view of a combustion tube provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of a protective cover according to an embodiment of the present invention;

FIG. 8 is a schematic view of a moisture outlet provided in accordance with an embodiment of the present invention;

fig. 9 is a schematic view of a driving wheel provided in an embodiment of the present invention;

FIG. 10 is a schematic view of a conveyor support wheel provided in accordance with an embodiment of the invention;

FIG. 11 is an enlarged view of a portion of the material transfer mechanism according to an embodiment of the present invention;

FIG. 12 is a schematic view of a scraper member according to an embodiment of the present invention;

fig. 13 is a schematic top enlarged view of a part of the structure of the material conveying mechanism according to the embodiment of the present invention.

In the figure: 1. drying box, 2, material feed inlet, 3, material discharge gate, 4, natural gas entry, 5, arrange wet mouthful, 6, frame, 7, material transport mechanism, 8, motor, 9, bearing, 10, combustion tube, 11, natural gas interface, 12, safety cover, 13, supporting wheel, 14, net chain conveyer belt, 15, ring flange, 16, transmission shaft, 17, air discharge fan, 18, powder discharge gate, 19, concave wheel, 20, heated board, 21, support, 22, scrape flitch, 23, combustion manifold, 24, delivery box, 25, powder net chain conveyer belt.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

as described in the background art, the drying box in the prior art has a low thermal efficiency, and the invention provides a drying device in order to solve the technical problem.

The first embodiment is as follows:

the embodiment of the invention provides a drying device, which comprises a drying box 1, wherein a rack 6 is arranged in the drying box, the rack 6 has a set height, a material conveying mechanism 7 is supported by the rack, a combustion assembly is positioned below the material conveying mechanism and can combust combustible gas, the combustion assembly is provided with a plurality of openings for radiating heat to dry food, a scraping piece is arranged on the rack and is arranged above the material conveying mechanism, and a set distance is reserved between the scraping piece and the material conveying mechanism or the scraping piece is in contact with the material conveying mechanism.

It can be understood that the frame can adopt a hollow rigid frame, the material can be garlic slices or fruit and vegetable slices, and the drying box is made of heat-insulating materials.

The drying box is arranged on the outer side of the rack, as shown in fig. 1-3, the drying box comprises a conveying box 24 arranged above the rack and a frame body surrounding the periphery of the rack, the bottom surface of the conveying box and the top surface of the frame body are a plane, the conveying box is communicated with the inside of the frame body, the two sides of the conveying box are inclined planes, and a material feeding hole is formed in the inclined plane on one side of the conveying box, so that the material feeding hole is located above one end of the first-layer material conveying mechanism.

The top of delivery box sets up row of damp mouth 5, as shown in fig. 8, row of damp mouth 5 department can set up hollow stand, the inside air discharge fan 17 that is equipped with of stand, a moisture that is used for drying the case and in the in-process of drying produces in time discharges, reduce the humidity in the stoving case, shorten the stoving time of garlic piece or fruit vegetables piece, in some examples, the delivery box top has set up three row of damp mouth 5 altogether, it can be understood of course, in order to balance heating device and exhaust apparatus's relation, can adjust the quantity of row of damp mouth, in order to guarantee that the inside humidity of stoving case is in normal range.

It will be appreciated that the exhaust fan 17 may be an existing industrial exhaust fan powered by a motor to drive the exhaust.

In this embodiment, when being provided with a plurality of material transport mechanism, a plurality of material transport mechanism set up from top to bottom, the interval sets for the distance between two adjacent material transport mechanism, and two adjacent material transport mechanism stagger the arrangement, partial material transport mechanism 'S both ends do not align rather than the tip of adjacent layer material transport mechanism promptly, be convenient for the material move to the upper strata material transport mechanism tip after whereabouts to next floor, two adjacent material transport mechanism' S removal opposite direction, the material is the S type along a plurality of material transport mechanism and conveys from top to bottom, the route and the time of material at the inside motion of stoving case have effectively been increased, help the stoving of material.

As shown in fig. 4-7, the material transfer mechanism includes a driving roller and a driven roller supported by the frame, the driving roller and the driven roller support the mesh-chain type conveyer belt 14, the driving roller is provided with at least two concave wheels 19 to match with the mesh-chain type conveyer belt, the concave wheels match with the mesh-chain type conveyer belt, the utilization efficiency of electric energy is improved, and the occupied space of the power device of the device is also reduced.

The material transport mechanism of fifth layer is used for conveying the powder, its drive mode is the same with the material transport mechanism on other layers, fifth layer material transport mechanism's powder net chain formula conveyer belt 25 adopts thinner net chain (the mesh size of powder net chain formula conveyer belt is less than upper strata net chain formula conveyer belt's mesh size) in net chain formula conveyer belt 14 comparison, prevent that the powder from leaking the below combustion tube region and arousing the conflagration, combustion assembly establishes in the fifth layer below that is used for transporting the powder net chain formula conveyer belt of powder, it can be understood that, first layer net chain formula conveyer belt is the top one deck, fifth layer powder net chain formula conveyer belt then is the bottom one deck.

Of course, the mesh size of the powder mesh chain conveyor is smaller than the size of the powder, which is usually in the range of 0.05-1mm, corresponding to a mesh size of less than 0.05 mm.

As shown in figures 1-4, a material inlet 2 is arranged on one side of the top of the conveying box, and the garlic slices or fruit and vegetable slices are conveyed by the existing feeding device to enter the first layer of mesh chain type conveying belt from the material inlet 2 for drying. The lateral part of the frame body of the drying box 1 is provided with a material discharge port 3, a powder discharge port and a natural gas inlet 4, the material discharge port and the powder discharge port are arranged on two sides of the drying box relatively, and the natural gas inlet is arranged below the material discharge port.

Wherein, need to explain that, the material feed inlet sets up at the homonymy of stoving case with the material discharge gate.

Because the net chain type conveyer belt 14 has five layers, in the process of drying work of the dryer, garlic slices or fruits and vegetables pass through the net chain type conveyer belts on different layers on the net chain type conveyer belt 14 and do continuous reciprocating motion, after two times of reciprocating motion, the garlic slices or fruits and vegetables are positioned on the fourth layer of net chain type conveyer belt, so that the material discharge port is arranged at the tail end of the fourth layer of net chain type conveyer belt, the garlic slices or fruits and vegetables are discharged from the material discharge port through the fourth layer of net chain type conveyer belt, the powder discharge port is arranged at the tail end of the powder net chain type conveyer belt 25 of the fifth layer, the powder of the garlic slices or fruits and vegetables is discharged out of the drying box through the powder discharge port 18 through the powder net chain type conveyer belt of the fifth layer, the starting end of the powder net chain type conveyer belt of the fifth layer is aligned with the net chain type conveyer belt of the fourth layer, the aim is to ensure that all the falling powder falls onto the net chain type conveyer belt, and prevent the garlic slices and fruits and vegetables from reaching the material discharge port, a small amount of powder falls onto the combustion assembly at the bottom of the drying box.

The powder net chain type conveyer belt is arranged below a material discharge port, and the net chain of the powder net chain type conveyer belt is thinner, so that in the material drying process, powder can fall to the top of the fifth layer powder net chain type conveyer belt through the net chain type conveyer belt from the first layer net chain type conveyer belt to the fourth layer net chain type conveyer belt, the powder falling from the net chain type conveyer belt is arranged so as to be connected, and the powder is prevented from falling to the combustion assembly below.

It can be understood that the combustible gas can be natural gas, the natural gas is a clean and environment-friendly high-quality energy source, almost no sulfur, dust and other harmful substances are contained, carbon dioxide generated during combustion is less than that of other fossil fuels, the greenhouse effect is low, and therefore the environment quality can be fundamentally improved.

Further, combustion assembly includes a plurality of sections combustion pipes, combustion pipe 10 sets up along the width direction of stoving case, the removal route of natural gas in combustion assembly is shorter, make the natural gas of burning can be full of whole stoving case rapidly in the short time, the interval sets for the distance between two adjacent sections combustion pipes, and each section combustion pipe is connected with combustion main 23 respectively, combustion main sets up along the length direction of stoving case, combustion main or combustion pipe have the part of lighting a fire, combustion main sets up the combustible gas interface, specifically is natural gas interface 11.

This embodiment adopts the natural gas direct combustion technique, and the inside natural gas interface 11 of stoving case box is connected to the outside natural gas entry 4 of stoving case, and natural gas interface 11 passes through flange dish 15 with the combustion header and carries out sealing connection, can effectively prevent the natural gas leakage, improves the security. The mode of burning natural gas at the bottom is adopted to obtain the heat source, the upper portion of combustion tube 10 has a plurality of trompils, is equipped with a plurality of rows of combustion tubes at stoving bottom of the case, lets in the back of natural gas, through ignition part ignition back, and the setting of trompil can obtain a large amount of heats rapidly, and the heat conversion efficiency of this mode is higher, more energy-conserving.

The natural gas entrance is equipped with adjusting valve, changes adjusting valve's opening size, can control flame's size, and then is favorable to controlling the temperature in the stoving case. In the process of garlic piece or fruit vegetables stoving, the powder of garlic piece or fruit vegetables can drop on the burner tube 10, and then blocks up the trompil that sets up on burner tube 10 upper portion, sets up burner tube safety cover 12 on the upper portion of burner tube 10, protects burner tube 10, guarantees the security of drying.

The regulating valve, the material conveying mechanism and the ignition part are respectively connected with the controller, the controller can be a PLC controller, unified control over all the parts is achieved through the controller, and the ignition part is an existing natural gas ignition part.

Specifically, as shown in fig. 7, the safety cover of burner pipe is connected with the frame, with having the distance of setting for between the burning subassembly, safety cover 12 includes the baffle, and "people" font structure is constituteed to two baffles, and the safety cover bottom is equipped with four landing legs, and two liang of landing legs are a set of, and the middle zone of every a set of landing leg is passed to the position of burner pipe, through the setting of safety cover, prevents that the powder from dropping and causing the jam on the burner pipe trompil, reduces drying efficiency, also can prevent to arouse unnecessary burning.

As shown in fig. 4 and 9-13, the insulation board 20 wraps around the frame 6 inside the drying box, the insulation board is arranged outside the frame, the driving roller and the driven roller of the material conveying mechanism are respectively provided with the bearing 9 matched with the drying box, the bearing 9 for supporting the material conveying mechanism is arranged outside the insulation board 20, the combustion pipe 10 burns the high temperature generated by natural gas, the insulation board gathers in the area surrounded by the insulation board, the bearing 9 is arranged outside the insulation board 20, the high temperature and high humidity environment are avoided, and the high temperature bearing protection technology remarkably prolongs the service life of the bearing.

In addition, the drive roll and the driven voller are transmission shaft 16, set up a plurality of concave wheels 19 on the transmission shaft 16, the concave wheel is located the both ends and the middle part of transmission shaft 16 and is used for supporting net chain formula conveyer belt, the concave wheel specifically is the rotation wheel, the week side of rotation wheel sets up a plurality of recesses, be used for with the cooperation of net chain formula conveyer belt, thereby drive the motion of net chain formula conveyer belt, use with net chain formula conveyer belt matched with concave wheel 19, replace the traditional net chain formula conveyer belt net chain and the drive mode of sprocket, this kind of drive mode improves the utilization efficiency of electric energy, the occupation space of equipment power device has also been reduced.

In addition, be equipped with supporting wheel 13 in the below of net chain formula conveyer belt, supporting wheel 13 movable mounting is in the frame, and is rotatable for the frame, and sets for the distance setting at the interval between two adjacent supporting wheels 13, and supporting wheel 13 can prevent that net chain formula conveyer belt from flagging, and the design of supporting wheel 13 has reduced the frictional force of net chain formula conveyer belt when operation, has reduced the loss of electric energy. Therefore, in the process of transporting garlic slices or fruit and vegetable slices by the material conveying mechanism, the motor 8 drives, the transmission wheel supports and transmits two ends of the net chain type conveying belt, the concave wheel 19 arranged in the middle of the transmission shaft 16 is matched with the middle part of the net chain type conveying belt 14 for supporting and transmitting under the action of the transmission shaft 16, and meanwhile, the bottom of the net chain type conveying belt 14 is also provided with the supporting wheel 13 for preventing the net chain type conveying belt from sagging and generating larger friction force when the net chain type conveying belt operates, so that the problem of overlarge power consumption in the prior art is solved; it will be appreciated that the powder mesh chain conveyor belt is driven in the same manner and supported in the same manner as the mesh chain conveyor belt, and differs from the mesh chain conveyor belt in the different objects to be conveyed and in the different mesh sizes of the mesh chains, i.e., the mesh size of the mesh chain of the powder mesh chain conveyor belt is small to prevent the powder from falling.

The material scraping pieces are arranged on a rack inside the drying box, a plurality of material scraping pieces are arranged above the material conveying mechanism, and a set distance is arranged between every two adjacent material scraping pieces above each material conveying mechanism at intervals; scrape material piece and include that the flitch 22 is scraped to the multirow, scrape the vertical setting of flitch 22 and scrape flitch 22 and set up along material transport mechanism's width direction, the one end of scraping the flitch is passed through support 21 and is connected with the frame, scrapes the flitch and contacts with material transport mechanism surface, guarantees that garlic piece or fruit vegetables piece and net chain formula conveyer belt do not have the adhesion, and the flitch staggered arrangement is scraped to each two adjacent of scraping material piece to stir the material, guarantee that the heating is even, improve the stoving quality.

At first start the ignition part, the natural gas gets into from natural gas entry 4, it burns to reach combustion tube 10 through natural gas interface 11, the trompil of combustion tube top can obtain the heat fast, the safety cover 12 of the top of combustion tube can prevent that the powder of stoving in-process from running up the trompil and blockking up, 4 adjusting valve's of natural gas entrance are adjusted to the stoving in-process size, steerable flame size, be favorable to controlling the interior temperature of stoving case, natural gas interface 11 uses ring flange 15 sealed with combustion tube 10, can effectively prevent that the natural gas from revealing, the security is improved, the moisture vent 5 is discharged through air discharge fan 17, reduce the humidity in the stoving case 1.

Garlic slices or fruit and vegetable slices are conveyed to a material feeding port at one end of a conveying box, the garlic slices or fruit and vegetable slices are firstly conveyed to the other end of the conveying box by a conveying mechanism in the conveying box, then the garlic slices or fruit and vegetable slices fall into the first layer of mesh chain type conveying belt in the drying box body, the garlic slices or fruit and vegetable slices are transported in a reciprocating mode through the mesh chain type conveying belt, the path and time of the movement of the materials in the drying box body are increased, the drying of the materials is facilitated, the movement direction is reversed to realize the reciprocating movement after the materials fall from the first layer of mesh chain type conveying belt to the second layer of mesh chain type conveying belt 14, after moving to the tail end of the fourth layer of mesh chain type conveying belt, garlic slices or fruit and vegetable slices are timely discharged through the material discharge port 3, and the powder collected from the first layer of mesh chain type conveying belt to the fourth layer of mesh chain type conveying belt is transmitted to the powder discharge port 18 by the powder mesh chain type conveying belt of the fifth layer.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. The utility model provides a drying device, a serial communication port, which comprises a frame, combustion assembly and a plurality of material transport mechanism are supported to the frame, combustion assembly is located material transport mechanism's below, combustion assembly can the combustible gas of burning, combustion assembly has a plurality of trompils and dries food with the heat that gives off, the rack-mount scrapes the material spare, scrapes the material spare and locates material transport mechanism's top, it has the distance of settlement or scrapes the contact of material spare with material transport mechanism to scrape between material spare and the material transport mechanism.

2. The drying device according to claim 1, wherein when a plurality of material conveying mechanisms are provided, a distance is set between two adjacent material conveying mechanisms, the two adjacent material conveying mechanisms are arranged in a staggered manner, moving directions of the two adjacent material conveying mechanisms are opposite, and the materials are conveyed from top to bottom along the plurality of material conveying mechanisms in an S shape.

3. The drying apparatus of claim 1, wherein the material transfer mechanism includes a drive roller and a driven roller supported by the frame, the drive roller and the driven roller supporting the belt-link conveyor, the drive roller having at least two concave wheels for engaging the belt-link conveyor.

4. The drying device of claim 3, wherein a plurality of support wheels are further disposed between the driving roller and the driven roller, the support wheels are movably mounted on the frame, and two adjacent support rollers are spaced apart by a predetermined distance.

5. The drying device according to claim 1, wherein a plurality of scraping members are arranged above the material conveying mechanism, and a set distance is arranged between every two adjacent scraping members above each material conveying mechanism;

the scraping parts comprise multiple rows of scraping plates, the scraping plates are in surface contact with the material conveying mechanism, two adjacent rows of scraping plates of the scraping parts are arranged in a staggered mode, and one ends of the scraping plates are connected with the rack through supports.

6. The drying apparatus of claim 1, wherein the burner assembly is disposed at a bottom of the frame; the combustion assembly comprises a plurality of combustion pipes, the distance is set between two adjacent sections of combustion pipes at intervals, each section of combustion pipe is connected with a combustion main pipe respectively, the combustion main pipe or the combustion pipes are provided with ignition parts, and one end of the combustion main pipe is provided with a combustible gas interface.

7. The drying apparatus of claim 1, wherein a protective cover is mounted over the combustion assembly, the protective cover is connected to the frame, and a predetermined distance is provided between the protective cover and the combustion assembly.

8. The drying device according to claim 1, further comprising a drying box, wherein the drying box is arranged on the outer side of the rack, the drying box is provided with a material inlet and a material outlet, the material inlet is positioned above one end of at least one material conveying mechanism, and the material outlet is positioned at one end of at least one material conveying mechanism;

a powder discharge port is also formed in one end of at least one material conveying mechanism below the material discharge port of the drying box;

one end of the material conveying mechanism close to the material discharge port or the powder discharge port is arranged beyond the rack.

9. The drying device of claim 8, wherein the top of the drying box is provided with a plurality of moisture discharge ports, and fans are installed in the moisture discharge ports;

the drying box is internally wrapped by the heat insulation plate arranged on the rack, and a bearing used for supporting the material conveying mechanism is arranged on the outer side of the heat insulation plate.

10. Use of a drying device according to any one of claims 1-9, for drying garlic flakes or fruit and vegetable flakes.