CN216522941U - Material drying device - Google Patents

Abstract

The utility model relates to the technical field of drying, and discloses a material drying device which comprises a material drying part and an exhaust gas treatment part, wherein damp and hot exhaust gas generated in the material drying part in the drying process can be introduced into the exhaust gas treatment part for dehumidification and heating treatment, and after the treatment is finished, the damp and hot exhaust gas can be introduced into the material drying part again to dry materials. Specifically, the exhaust gas treatment part comprises a first exhaust gas treatment unit or a second exhaust gas treatment unit, wherein heat exchange assemblies of the first exhaust gas treatment unit and the second exhaust gas treatment unit are different, and the wet and hot exhaust gas can be treated, wherein the first exhaust gas treatment unit comprises a regenerator, a first surface cooler and a first heat pump assembly, and the second exhaust gas treatment unit comprises a regenerator, a first surface cooler, a second surface cooler, a heater and a second heat pump assembly. The waste gas treatment of the two modes uses the heat pump assembly as a main heat source, does not consume steam and natural gas, is more environment-friendly and energy-saving, has a large temperature regulation range and a wide application scene, and has higher economical efficiency.

Description

Material drying device

Technical Field

The utility model relates to the technical field of drying, in particular to a material drying device.

Background

Drying refers to an operation of obtaining a dried material by gasifying moisture in a wet material by using heat energy and taking away the gasified moisture by using air flow or vacuum, so that the material drying is one step in the production of a plurality of materials.

The drying step produces damp and hot waste gas, which, if directly discharged to the atmosphere, causes some pollution, and therefore the damp and hot waste gas produced in the material drying step needs to be treated. At present, besides the treatment of damp and hot waste gas after purification and discharge, the treatment also includes the recycling of damp and hot waste gas, that is, after the damp and hot waste gas generated in the previous drying step is dehumidified, the treated damp and hot waste gas is reused in the subsequent drying step, so as to realize the closed cycle of damp and hot waste gas. Thereby reducing pollution and having more economic performance. Therefore, it is important to improve the performance of the recycling apparatus for recycling the damp and hot exhaust gas so as to apply the damp and hot exhaust gas to the drying device more efficiently.

Therefore, a material drying device is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a material drying device, which aims to solve the problems of small load adjusting range and low recycling rate of damp and hot waste gas of a damp and hot waste gas recycling device and improve the economic performance of the material drying device.

As the conception, the technical scheme adopted by the utility model is as follows:

a material drying apparatus comprising:

the material drying part is provided with an air inlet and an air outlet;

waste gas treatment portion, including first waste gas treatment unit or second waste gas treatment unit, the damp and hot waste gas that material drying portion produced can pass through the gas vent gets into waste gas treatment portion, and process first waste gas treatment unit or second waste gas treatment unit handles the back, the rethread the air inlet gets into material drying portion, first waste gas treatment unit includes regenerator, first surface cooler and first heat pump subassembly, second waste gas treatment unit includes regenerator, first surface cooler, second surface cooler, heater and second heat pump subassembly.

Optionally, the first heat pump assembly includes a first compressor, and a first condenser and a first evaporator respectively communicated with the first compressor, and the hot and humid exhaust gas can sequentially pass through the pre-cooling section of the heat regenerator, the first surface air cooler, the first evaporator, the re-heating section of the heat regenerator, and the first condenser, or the hot and humid exhaust gas can pass through the first condenser.

Optionally, damp and hot exhaust-gas treatment portion still includes waste gas recovery chamber, first exhaust-gas treatment chamber and the second exhaust-gas treatment chamber that communicates each other, waste gas recovery chamber is located the top of material drying portion, first exhaust-gas treatment chamber with the second exhaust-gas treatment chamber is located the side of material drying portion, the gas vent warp waste gas recovery chamber communicate in first waste-gas treatment chamber with the second exhaust-gas treatment chamber, the regenerator first surface cooler with first evaporimeter all set up in first waste-gas treatment chamber, first condenser set up in second exhaust-gas treatment chamber.

Optionally, the second heat pump assembly includes a second compressor, and a second condenser and a second evaporator respectively communicated with the second compressor, the second surface cooler is communicated with the second evaporator, and the hot and humid exhaust gas can sequentially pass through the pre-cooling section of the heat regenerator, the first surface cooler, the second surface cooler, the re-heating section of the heat regenerator, and the heater, or the hot and humid exhaust gas can pass through the heater.

Optionally, the exhaust-gas treatment portion still includes waste gas recovery chamber, first exhaust-gas treatment chamber and second exhaust-gas treatment chamber, the waste gas recovery chamber is located the top of material drying portion, first exhaust-gas treatment chamber with the second exhaust-gas treatment chamber is located the side of material drying portion, the gas vent warp the waste gas recovery chamber communicate in first waste-gas treatment chamber with second exhaust-gas treatment chamber, the regenerator first surface cooler the second surface cooler all set up in first exhaust-gas treatment chamber, the heater set up in second exhaust-gas treatment chamber.

Optionally, the exhaust treatment part further comprises a filter, the filter is arranged in the exhaust recovery cavity, and the damp and hot exhaust enters the first exhaust treatment cavity and/or the second exhaust treatment cavity through the filter.

Optionally, the exhaust-gas treatment portion still includes dehumidification fan and circulating fan, the dehumidification fan set up in the gas entrance of first exhaust-gas treatment chamber, circulating fan set up in the gas entrance of second exhaust-gas treatment chamber.

Optionally, the material drying portion includes the material drying cabinet, the material drying cabinet is including the preceding wind chamber of equalling wind, drying chamber and the back room of equalling wind that communicate in proper order, the material conveyer belt set up in the drying chamber, preceding wind chamber of equalling wind pass through the air inlet communicate in the second exhaust-gas treatment chamber, the back room of equalling wind pass through the gas vent communicate in the waste gas recovery chamber.

Optionally, the material drying portion still include with feeding case and the tail-box of material drying cabinet intercommunication, the feeding case with the tail-box set up respectively in the material drying cabinet does not set up the both sides limit in first exhaust-gas treatment chamber with the second exhaust-gas treatment chamber, material conveyer belt one end sets up in the feeding incasement, the other end sets up in the tail-box.

Optionally, the material conveyer belt includes first material conveyer belt and second material conveyer belt that the interval set up, and the material can follow first material conveyer belt drops to second material conveyer belt, just second material conveyer belt with the direction of delivery of first material conveyer belt is opposite.

The utility model has the beneficial effects that:

the material drying device provided by the utility model comprises a material drying part and an exhaust gas treatment part, wherein damp and hot exhaust gas generated in the drying process of the material drying part can be introduced into the material drying part for dehumidification and heating treatment, and after the treatment is finished, the damp and hot exhaust gas can be introduced into the material drying part again to dry the material. Specifically, the exhaust gas treatment part comprises a first exhaust gas treatment unit or a second exhaust gas treatment unit, wherein the heat exchange assemblies of the first exhaust gas treatment unit and the second exhaust gas treatment unit are different, but the wet and hot exhaust gas treatment can be realized, the first exhaust gas treatment unit comprises a heat regenerator, a first surface cooler and a first heat pump assembly, and the second exhaust gas treatment unit comprises a heat regenerator, a first surface cooler, a second surface cooler, a heater and a second heat pump assembly. The waste gas treatment of aforementioned two kinds of modes all uses heat pump assembly as main heat source, does not consume steam and natural gas, and environmental protection and energy saving more just can realize temperature regulation on a large scale for material drying device has comparatively extensive application scene, has higher economic nature.

Drawings

Fig. 1 is a schematic structural diagram of a first view angle of a material drying device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second view of a material drying device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third view of a material drying device according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a third view angle of the material drying device according to the second embodiment of the present invention;

fig. 6 is a sectional view taken in the direction B-B in fig. 5.

In the figure:

1. a heat regenerator; 2. a first surface air cooler; 3. a second surface air cooler; 4. a heater; 5. a first heat pump assembly; 51. a first compressor; 52. a first condenser; 53. a first evaporator; 6. a second heat pump assembly; 61. a second compressor; 62. a second condenser; 63. a second evaporator; 7. a filter; 8. a dehumidification fan; 9. a circulating fan; 10. a material conveying belt; 101. a first material conveying belt; 102. a second material conveying belt; 11. a distributing device; 12. a mesh belt drive; 13. a feed inlet;

100. a first exhaust treatment chamber; 200. a second exhaust treatment chamber; 300. a waste gas recovery chamber; 400. a feeding box; 500. a material drying box; 600. a tail box; 700. a heat pump box.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

For effectively improving the wet and hot waste gas recovery efficiency, the service performance of the material drying device is improved. The utility model provides a material drying device, which takes a heat pump system as a main heat source for treating damp and hot waste gas, does not need to consume natural gas and steam, and is more environment-friendly and energy-saving. As shown in fig. 1 and 2, the material drying device includes a material drying part and an exhaust gas treatment part. The material drying part is used for drying the materials, and the waste gas treatment part is used for carrying out subsequent treatment on the damp and hot waste gas discharged in the drying process, so that the damp and hot waste gas can be reused for subsequent drying, namely the damp and hot waste gas can be recycled.

The material drying part is provided with an air inlet and an air outlet, and the damp and hot waste gas is discharged through the air outlet and enters the material drying part through the air inlet after being treated. The waste gas treatment part provided by the utility model comprises a first waste gas treatment unit or a second waste gas treatment unit, namely, the damp and hot waste gas is required to be treated by the first waste gas treatment unit after entering the waste gas treatment part, or the damp and hot waste gas is required to be treated by the second waste gas treatment unit after entering the waste gas treatment part, and then the damp and hot waste gas can be changed into gas for recycling. Wherein the first exhaust gas treatment unit includes a regenerator 1, a first surface cooler 2, and a first heat pump assembly 5, and the second exhaust gas treatment unit includes a regenerator 1, a first surface cooler 2, a second surface cooler 3, a heater 4, and a second heat pump assembly 6. Specifically, the operation flow regarding the first exhaust gas treatment unit or the second exhaust gas treatment unit will be specifically described below with reference to the drawings.

Example one

As shown in fig. 3 and 4, the first heat pump assembly 5 includes a first compressor 51, a first condenser 52, and a first evaporator 53, and both the first condenser 52 and the first evaporator 53 communicate with the first compressor 51. In this embodiment, the first evaporator 53 is used for cooling and dehumidifying the damp and hot exhaust gas to perform the dehumidifying function of the exhaust gas treatment part, and the first condenser 52 is used for heating the damp and hot exhaust gas. Specifically, the damp and hot waste gas needs to sequentially pass through the precooling section of the heat regenerator 1, the first surface cooler 2, the first evaporator 53, the reheating section of the heat regenerator 1 and the first condenser 52 so as to realize the primary cooling, the secondary cooling and the tertiary cooling of the damp and hot waste gas, the moisture in the damp and hot waste gas is firstly removed by utilizing the cooling and dehumidifying principle, and then the primary heating and the secondary heating are carried out so that the treated gas can reach the temperature and the humidity of the gas required by drying, and the gas is conveniently sent back to the material drying part again. Optionally, the temperature of the treated gas can reach 40-140 ℃. However, part of the hot humid exhaust gas does not need to be subjected to all the treatment steps described above, and can be directly heated by the first condenser 52 and then returned to the material drying section. It can be understood that the hot and humid exhaust gas processed only by the first condenser 52 can be used as a humidity and temperature adjusting part of the drying gas, and the flow rates of the two processed gases can be properly adjusted to meet the humidity and temperature of the gas required for drying different materials, or the temperature and humidity of the gas required for different drying stages of the same material.

In order to implement the above-mentioned split-flow treatment for the damp and hot exhaust gas, in this embodiment, the exhaust gas treatment portion further includes an exhaust gas recovery chamber 300, a first exhaust gas treatment chamber 100, and a second exhaust gas treatment chamber 200, which are communicated with each other. As shown in fig. 3, the waste gas recycling chamber 300 is located at the top of the material drying portion, the first waste gas treatment chamber 100 and the second waste gas treatment chamber 200 are located at the side of the material drying portion, and waste gas generated by the material drying portion can enter the first waste gas treatment chamber 100 and/or the second waste gas treatment chamber 200 through the diversion function of the waste gas recycling chamber 300. As shown in fig. 4, the regenerator 1, the first surface cooler 2, and the first evaporator 53 are disposed in the first exhaust gas treatment chamber 100, and the first condenser 52 is disposed in the second exhaust gas treatment chamber 200. Referring to the flow direction of the hot and humid exhaust gas shown in fig. 3 and 4, the hot and humid exhaust gas entering the first exhaust gas treatment chamber 100 flows downward through the pre-cooling section of the regenerator 1, the first surface cooler 2 and the first evaporator 53, then flows upward to pass through the reheating section of the regenerator 1, then enters the second exhaust gas treatment chamber 200 through the ventilation opening communicating the first exhaust gas treatment chamber 100 and the second exhaust gas treatment chamber 200, and is then heated by the first condenser 52. Of course, in order to ensure that the hot humid exhaust gas can flow in the direction of flow shown in fig. 3 and 4, the hot humid exhaust gas should have a velocity when entering the first exhaust treatment chamber 100, which velocity partly results from the velocity of the hot humid exhaust gas itself when the material is dry and partly from further acceleration of the hot humid exhaust gas during treatment.

Optionally, as shown in fig. 2, the exhaust gas treatment part further includes a dehumidifying fan 8, and the dehumidifying fan 8 is disposed at the gas inlet of the first exhaust gas treatment chamber 100. The arrangement of the dehumidifying fan 8 improves the flow rate of the damp and hot waste gas in the waste gas recovery cavity 300, and is convenient for guiding the damp and hot waste gas in the first waste gas treatment cavity 100. Optionally, the waste gas treatment part further comprises a circulating fan 9, and the circulating fan 9 is arranged at the gas inlet of the second waste gas treatment cavity 200, so that the speed of the gas required by material drying can be increased.

Optionally, as shown in fig. 3 and 4, the exhaust gas treatment part further includes a filter 7, and the filter 7 is disposed in the exhaust gas recovery cavity 300, so that material dust carried in the damp and hot exhaust gas can be effectively prevented from entering the first exhaust gas treatment cavity 100 and/or the second exhaust gas treatment cavity 200, and cleanness of each heat exchange component in the first exhaust gas treatment cavity 100 and the second exhaust gas treatment cavity 200 can be ensured. In this embodiment, the filter 7 includes a primary filter and a secondary filter, which are disposed at an interval, wherein the primary filter is disposed upstream of the secondary filter, so that the hot and humid exhaust gas can first flow through the primary filter.

Note that in the material drying section of the present embodiment, in order to reduce unnecessary heat loss, material drying needs to be performed in the material drying box 500. In this embodiment, the material drying box 500 includes a front air-equalizing chamber, a drying chamber and a rear air-equalizing chamber, and the material conveying belt 10 is disposed in the drying chamber. Referring to fig. 1 to 3, it can be seen that the front air-equalizing chamber and the rear air-equalizing chamber are oppositely disposed at two sides of the drying chamber, the front air-equalizing chamber is communicated with the second exhaust gas treatment chamber 200 through an air inlet, the rear air-equalizing chamber is communicated with the exhaust gas recovery chamber 300 through an air outlet, that is, a plurality of gases required for drying flow from the front air-equalizing chamber to the rear air-equalizing chamber, and the flow direction of the gases is perpendicular to or at a certain included angle with the conveying direction of the material conveying belt 10, rather than moving in the same direction.

Further, as shown in fig. 1, the material drying part further includes a feeding box 400 and a tail box 600 communicated with the material drying box 500, and the feeding box 400 and the tail box 600 are respectively disposed on two sides of the material drying box 500 where no front air-equalizing chamber and no rear air-equalizing chamber are disposed. With this arrangement, in the feed box 400, the drying chamber, and the tail box 600, which are communicated with each other, the material conveyer 10 is disposed in the feed box 400 at one end and in the tail box 600 at the other end. When the material is dried in the material drying box 500, the material may be placed on the material conveyer belt through the material feeding box 400, and then the material is conveyed on the material conveyer belt 10 while being dried. It will be appreciated that the material conveyor belt 10 is a belt drive which relies on a belt drive 12 disposed within the tail box 600 to effect movement of the material conveyor belt 10. Furthermore, a distributor 11 is disposed in the feeding box 400 for conveying the material onto the material conveyer belt 10.

Further, the material conveying belt 10 includes a first material conveying belt 101 and a second material conveying belt 102 which are arranged at intervals, as shown in fig. 1, the second material conveying belt 102 is located below the first material conveying belt 101, and one end of the second material conveying belt 102 is arranged beyond the first material conveying belt 101, so that the material can fall from the first material conveying belt 101 to the second material conveying belt 102 during the conveying process. Of course, the first material conveyer belt 101 and the second material conveyer belt 102 are in the opposite conveying direction, and when the first material conveyer belt 101 moves in the ab direction shown in fig. 1, the second material conveyer belt 102 should move in the cd direction shown in fig. 1, that is, the material enters from the feeding box 400 and will return to the feeding box 400 after the drying is completed. Optionally, the bottom of the feeding box 400 is provided with a discharge port, and the dried material can be conveyed to the outside of the material drying device from the discharge port.

Optionally, the bottom of the tail box 600 is provided with a scrap conveyor. In the process that the material falls to the second material conveying belt 102, a part of the material may be scattered to the inside of the tail box 600, and the waste material inside the tail box 600 may be conveyed to the outside of the material drying device by the waste material conveyor at the bottom of the tail box 600, so as to prevent accumulation.

Alternatively, the number of the first material conveyer belt 101 and the second material conveyer belt 102 may be set to at least one.

Example two

The embodiment discloses material drying device, material drying device in this embodiment and material drying device in the embodiment one's difference lies in: the waste gas treatment part comprises a second waste gas treatment unit which comprises a heat regenerator 1, a first surface cooler 2, a second surface cooler 3, a heater 4 and a second heat pump assembly 6, and damp and hot waste gas needs to sequentially pass through a pre-cooling section of the heat regenerator 1, the first surface cooler 2, the second surface cooler 3, a reheating section of the heat regenerator 1 and the heater 4 for dehumidification and heating treatment after entering a first waste gas treatment cavity 100, or directly enters a second waste gas treatment cavity 200 for heating treatment through the heater 4.

As shown in fig. 5 and 6, the second heat pump assembly 6 includes a second compressor 61, a second condenser 62, and a second evaporator 63, both the second condenser 62 and the second evaporator 63 are communicated with the second compressor 61, and the second evaporator 63 is communicated with the second surface cooler 3. In this embodiment, the second condenser 62, the second evaporator 63, and the second compressor 61 belong to the same heat pump system, and the second compressor 61 can circulate and introduce a low-temperature refrigerant (for example, freon) that exchanges heat with gas into the second evaporator 63, and can circulate and introduce a high-temperature refrigerant (for example, freon) that exchanges heat with air into the second condenser 62, so that the second evaporator 63 serves as a cooling element.

In addition, as shown in fig. 6, the material drying apparatus further includes a heat pump box 700, in this embodiment, the second heat pump assemblies 6 are disposed in the heat pump box 700, the heat regenerator 1, the first surface air cooler 2, and the second surface air cooler 3 are disposed in the first exhaust gas treatment chamber 100, and the heater 4 is disposed in the second exhaust gas treatment chamber 200. Wherein second evaporimeter 63 and second surface cooler 3 intercommunication to the realization is to the cooling of second surface cooler 3, and further, can utilize second surface cooler 3 to carry out tertiary cooling to damp and hot waste gas, in order to realize the cooling dehumidification to damp and hot waste gas. It can know, in this embodiment, utilize freon to realize the heat transfer circulation of second heat pump assembly 6 as the refrigerant, use this as the basis again, realize the cooling of second surface cooler 3, both guaranteed heat exchange efficiency, also can avoid freon to reveal pollution and harm that probably cause the dry material to dry gas in, this sets up not only economic energy-conservation, also can effectively guarantee the cleanness of material simultaneously.

In addition, the rest of the structure of the material drying device provided in this embodiment is the same as that of the material drying device in the first embodiment, and details are not described here.

The foregoing embodiments are merely illustrative of the principles and features of this invention, and the utility model is not limited to the embodiments described above, but rather, is susceptible to various changes and modifications without departing from the spirit and scope of the utility model, as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A material drying apparatus, comprising:

the material drying part is provided with an air inlet and an air outlet;

waste gas treatment portion, including first waste gas treatment unit or second waste gas treatment unit, the damp and hot waste gas that material drying portion produced can pass through the gas vent gets into waste gas treatment portion, and process first waste gas treatment unit or second waste gas treatment unit handles the back, the rethread the air inlet gets into material drying portion, first waste gas treatment unit includes regenerator (1), first surface cooler (2) and first heat pump subassembly (5), second waste gas treatment unit includes regenerator (1), first surface cooler (2), second surface cooler (3), heater (4) and second heat pump subassembly (6).

2. The material drying apparatus according to claim 1, wherein the first heat pump assembly (5) includes a first compressor (51) and a first condenser (52) and a first evaporator (53) respectively communicating with the first compressor (51), and the hot humid exhaust gas can sequentially pass through a pre-cooling section of the regenerator (1), the first surface cooler (2), the first evaporator (53), a re-heating section of the regenerator (1) and the first condenser (52), or the hot humid exhaust gas can pass through the first condenser (52).

3. The material drying device according to claim 2, wherein the exhaust gas treatment portion further comprises an exhaust gas recovery chamber (300), a first exhaust gas treatment chamber (100) and a second exhaust gas treatment chamber (200) which are communicated with each other, the exhaust gas recovery chamber (300) is located at the top of the material drying portion, the first exhaust gas treatment chamber (100) and the second exhaust gas treatment chamber (200) are located at the side of the material drying portion, the exhaust port is communicated with the first exhaust gas treatment chamber (100) and the second exhaust gas treatment chamber (200) through the exhaust gas recovery chamber (300), the regenerator (1), the first surface cooler (2) and the first evaporator (53) are all disposed in the first exhaust gas treatment chamber (100), and the first condenser (52) is disposed in the second exhaust gas treatment chamber (200).

4. The material drying device according to claim 1, wherein the second heat pump assembly (6) comprises a second compressor (61) and a second condenser (62) and a second evaporator (63) which are respectively communicated with the second compressor (61), the second surface cooler (3) is communicated with the second evaporator (63), and the hot and humid exhaust gas can sequentially pass through a pre-cooling section of the regenerator (1), the first surface cooler (2), the second surface cooler (3), a reheating section of the regenerator (1) and the heater (4), or the hot and humid exhaust gas can pass through the heater (4).

5. The material drying device according to claim 4, wherein the exhaust gas treatment portion further comprises an exhaust gas recovery chamber (300), a first exhaust gas treatment chamber (100) and a second exhaust gas treatment chamber (200), the exhaust gas recovery chamber (300) is located at the top of the material drying portion, the first exhaust gas treatment chamber (100) and the second exhaust gas treatment chamber (200) are located at the side of the material drying portion, the exhaust port is communicated with the first exhaust gas treatment chamber (100) and the second exhaust gas treatment chamber (200) through the exhaust gas recovery chamber (300), the heat regenerator (1), the first surface cooler (2) and the second surface cooler (3) are disposed in the first exhaust gas treatment chamber (100), and the heater (4) is disposed in the second exhaust gas treatment chamber (200).

6. The material drying apparatus according to any one of claims 3 or 5, wherein the exhaust gas treatment part further comprises a filter (7), the filter (7) is disposed in the exhaust gas recovery chamber (300), and the damp and hot exhaust gas enters the first exhaust gas treatment chamber (100) and/or the second exhaust gas treatment chamber (200) through the filter (7).

7. The material drying device according to any one of claims 3 or 5, wherein the waste gas treatment part further comprises a dehumidifying fan (8) and a circulating fan (9), the dehumidifying fan (8) is arranged at a gas inlet of the first waste gas treatment chamber (100), and the circulating fan (9) is arranged at a gas inlet of the second waste gas treatment chamber (200).

8. The material drying device according to any one of claims 3 or 5, wherein the material drying part comprises a material drying box (500), the material drying box (500) comprises a front air equalizing chamber, a drying chamber and a rear air equalizing chamber which are sequentially communicated, a material conveying belt (10) is arranged in the drying chamber, the front air equalizing chamber is communicated with the second waste gas treatment chamber (200) through the air inlet, and the rear air equalizing chamber is communicated with the waste gas recovery chamber (300) through the air outlet.

9. The material drying device according to claim 8, wherein the material drying part further comprises a feeding box (400) and a tail box (600) which are communicated with the material drying box (500), the feeding box (400) and the tail box (600) are respectively arranged on two sides of the material drying box (500) where the first waste gas treatment cavity (100) and the second waste gas treatment cavity (200) are not arranged, and one end of the material conveying belt (10) is arranged in the feeding box (400) and the other end is arranged in the tail box (600).

10. The material drying device according to claim 9, characterized in that the material conveying belt (10) comprises a first material conveying belt (101) and a second material conveying belt (102) which are arranged at intervals, the material can fall from the first material conveying belt (101) to the second material conveying belt (102), and the conveying direction of the second material conveying belt (102) is opposite to that of the first material conveying belt (101).

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