Box-type drying device with heat energy recycling function

Abstract

The application provides a box type drying device with heat energy recycling, comprising a box body, a material conveying mechanism arranged in the box body and a heat energy recycling mechanism connected to the box body; the box body is composed of at least two drying chambers, the number of the heat energy recycling mechanisms corresponds to the number of the drying chambers; an air outlet is arranged at the top of each drying chamber, and an air inlet is arranged at the front of each drying chamber; the heat energy recycling mechanism comprises, in sequence, a heat exchanger, a gas-liquid separation channel and a centrifugal fan connected to the air inlet; the other end of the centrifugal fan is connected to the air outlet of the adjacent drying chamber through a heat energy collecting pipeline. The box type drying device of the application divides the box body into at least two drying chambers and configures an independent heat energy recycling mechanism for each chamber, thereby realizing heat energy recycling with the humidity and temperature of hot air controlled in stages, effectively reducing the humidity of hot air and improving the drying efficiency.

Description

Technical Field

[0001] This application relates to the field of drying equipment technology, specifically to a box-type drying device that utilizes heat energy recycling. Background Technology

[0002] Box-type drying equipment uses direct heating of air, which is then introduced into the drying chamber to dry the materials. This method has many drawbacks, the most prominent being energy waste. In traditional drying processes, after the hot air exchanges heat with the materials inside the drying chamber, its temperature decreases and its humidity increases, with most of the hot air being directly discharged from the chamber. However, this discharged hot air still contains a significant amount of heat energy; direct discharge not only results in substantial energy waste but also increases the cost of the drying process. To improve energy efficiency and reduce production costs, box-type drying equipment with heat energy recycling has emerged. This type of equipment recovers the hot air discharged from the drying chamber, reheats it, and then reintroduces it into the drying chamber, achieving the recycling of heat energy. This device reduces energy waste to a certain extent, improves drying efficiency, and lowers production costs.

[0003] However, existing heat energy recycling box-type drying devices have also revealed some problems in practical applications. In the later stages of heat energy recycling, as hot air is continuously circulated, the humidity in the hot air gradually increases. This is because the material continuously releases moisture into the hot air during the drying process. High humidity hot air reduces the drying effect, slows down the drying speed, and reduces production efficiency. High humidity hot air also easily forms condensation inside the drying chamber and in pipes, which not only corrodes the equipment and shortens its lifespan but may also cause electrical components to become damp and damaged, leading to safety hazards. Furthermore, the presence of condensation may contaminate the dried material, affecting product quality. Utility Model Content

[0004] The purpose of this invention is to provide a box-type drying device that utilizes heat energy recycling, which can improve drying efficiency and avoid equipment corrosion and product contamination caused by condensate.

[0005] This application is achieved through the following technical solution, specifically:

[0006] A box-type drying device for heat energy recycling includes: a box body, a material conveying mechanism disposed within the box body, and a heat energy recycling mechanism connected to the box body; the box body is composed of at least two drying chambers spliced ​​together, and the number of heat energy recycling mechanisms corresponds to the number of drying chambers; an air outlet is provided at the top of each drying chamber, and an air inlet is provided at the front; the heat energy recycling mechanism includes a heat exchanger, a gas-liquid separation channel, and a centrifugal fan connected sequentially to the air inlet, and the other end of the centrifugal fan is connected to the air outlet of an adjacent drying chamber through a heat energy collection pipe.

[0007] In this solution, by dividing the chamber into at least two drying chambers and equipping each chamber with an independent thermal energy circulation mechanism, combined with the series structure of the gas-liquid separation channel and the heat exchanger, the thermal energy circulation of the hot air humidity and temperature is controlled in stages. This effectively reduces the humidity of the hot air, improves the drying efficiency, and avoids equipment corrosion and product contamination caused by condensate, thereby significantly improving the performance and reliability of the drying device.

[0008] As an improvement to the gas-liquid separation channel in this application, the gas-liquid separation channel is provided with an air inlet and an air outlet on both sides, and the inner wall is provided with an arc-shaped baffle with a concave surface facing the air inlet.

[0009] Furthermore, the bottom of the gas-liquid separation channel is provided with a guide surface that extends downward from the air inlet side to the air outlet side, and a drain outlet is provided at the bottom end of the guide surface.

[0010] Furthermore, a hydrophobic plate parallel to the guide surface is provided above the guide surface, and the hydrophobic plate is provided with multiple water outlet holes.

[0011] Furthermore, a liquid receiving trough is provided at the lower position of the guide surface, and the drain outlet is opened at the bottom of the liquid receiving trough.

[0012] As an improvement to the material conveying mechanism in this application, the material conveying mechanism includes a motor, a drive chain shaft connected to the motor, and a conveyor belt wound on the drive chain shaft; the position of the conveyor belt in the housing is higher than the position of the air inlet of the drying chamber.

[0013] As an improvement of this application, the above-mentioned box-type drying device further includes: a temperature control system installed inside the box, the temperature control system including temperature sensors installed in each of the drying chambers and a temperature controller electrically connected to the temperature sensors, the temperature controller being used to adjust the power of the heat exchanger.

[0014] The beneficial effects of this application are as follows:

[0015] The solution proposed in this application divides the drying chamber into at least two drying chambers and equips each chamber with an independent thermal energy circulation mechanism. Combined with the series structure of the gas-liquid separation channel and the heat exchanger, it realizes the staged control of hot air humidity and temperature thermal energy circulation, effectively reducing hot air humidity, improving drying efficiency, and avoiding equipment corrosion and product contamination problems caused by condensate, thereby significantly improving the performance and reliability of the drying device.

[0016] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a box-type drying device for heat energy recycling in an embodiment of this application;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of a box-type drying device for heat energy recycling in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Housing; 2. Material conveying mechanism; 3. Thermal energy circulation mechanism; 4. Drying chamber; 41. Air outlet; 42. Air inlet; 31. Heat exchanger; 32. Gas-liquid separation channel; 33. Centrifugal fan; 34. Heat collection pipeline; 21. Motor; 22. Drive chain shaft; 23. Conveyor belt; 321. Arc-shaped baffle plate; 322. Guide surface; 323. Drain outlet; 324. Drain plate; 325. Water outlet; 326. Liquid receiving tank. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1-2 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] In view of the problems existing in the background technology or products, Figure 1 This paper shows a schematic diagram of a box-type drying device for heat energy recycling according to an embodiment of this application. Figure 2 A cross-sectional schematic diagram of a box-type drying device that utilizes heat energy recycling is shown. Figure 1 and 2As shown, this application provides a box-type drying device for heat energy recycling, including: a box body 1, a material conveying mechanism 2 disposed in the box body 1, and a heat energy recycling mechanism 3 connected to the box body 1;

[0023] The housing 1 is composed of at least two drying chambers 4 spliced ​​together. The number of heat energy circulation mechanisms 3 corresponds to the number of drying chambers 4. The top of each drying chamber 4 is provided with an air outlet 41 and the front is provided with an air inlet 42. The heat energy circulation mechanism 3 includes a heat exchanger 31, a gas-liquid separation channel 32 and a centrifugal fan 33 connected in sequence to the air inlet 42. The other end of the centrifugal fan 33 is connected to the air outlet 41 of the previous drying chamber 4 through a heat energy collection pipe 34.

[0024] Specifically, the housing 1, serving as the main frame of the entire device, is made of metal to ensure structural stability. The interior of housing 1 is divided into at least two drying chambers 4, for example, two or three, each relatively independent yet adjacent to each other. A material conveying mechanism 2 runs through the entire housing 1, sequentially conveying the material to be dried into each drying chamber 4. It should be noted that the material conveying direction is opposite to the hot air flow direction, forming counter-current drying to improve drying efficiency. Each drying chamber 4 is equipped with an independent thermal energy circulation mechanism 3, ensuring that each chamber can independently control hot air circulation. Each drying chamber 4 has an air outlet 41 at its top. Due to the principle of hot air rising, the hot air is discharged from the air outlet 41 at the top of the drying chamber 4 after sufficient contact with the material. An air inlet 42 is provided at the front to introduce hot air discharged from adjacent drying chambers 4 that has been processed by the thermal energy circulation mechanism 3. The air inlet 42 of the drying chamber 4 near the discharge port of housing 1 is connected to the drying air source. Hot air discharged from drying chamber 4 is drawn into centrifugal fan 33 through heat collection pipe 34, providing power for the circulation of hot air. In gas-liquid separation channel 32, water vapor absorbed by the hot air during heat exchange with the material is separated out, heated by heat exchanger 31, and then enters the next drying chamber 4 to continue drying the material. Heat exchanger 31 can be an electric heater or a steam heat exchanger, selected according to actual needs.

[0025] In one implementation, the gas-liquid separation channel 32 has an air inlet and an air outlet on both sides, and the inner wall is provided with an arc-shaped baffle 321 with a concave surface facing the air inlet.

[0026] Specifically, the centrifugal fan 33 provides the power for the high-speed flow of hot air, forcing the hot air into the gas-liquid separation channel 32. The inner wall of the gas-liquid separation channel 32 is equipped with an arc-shaped baffle 321 with its concave surface facing the air inlet. According to the principle of wall ejection, when hot air rushes towards the arc-shaped baffle 321 at a certain speed, the hot air changes its flow direction along the concave surface of the arc-shaped baffle 321. Due to its greater inertia, the water vapor in the hot air cannot keep up with the change in flow direction as the hot air changes direction, and thus it impacts the surface of the arc-shaped baffle 321 and condenses on it, forming liquid water that adheres to the arc-shaped baffle 321. As hot air continuously enters the gas-liquid separation channel 32 and continuously impacts the arc-shaped baffle 321, more and more water vapor condenses into liquid water on the arc-shaped baffle 321. This liquid water flows downwards along the arc-shaped baffle 321 under the influence of gravity, achieving gas-liquid separation.

[0027] To improve the separation efficiency of condensate, preferably, the bottom of the gas-liquid separation channel 32 is provided with a guide surface 322 extending downwards from the air inlet side to the air outlet side, and a drain outlet 323 is provided at the bottom end of the guide surface 322. Because the guide surface 322 is inclined downwards, liquid water will flow downwards along the guide surface 322 under the action of gravity, eventually collecting at the lower end of the guide surface 322 and being discharged from the gas-liquid separation channel 32 through the drain outlet 323 at the bottom end of the guide surface 322, preventing water from accumulating in the gas-liquid separation channel 32 and affecting the separation effect. Optionally, a liquid receiving trough 326 is provided at the lower position of the guide surface 322, and the drain outlet 323 is located at the bottom of the liquid receiving trough 326. The liquid receiving trough 326 serves as a buffer and centralized collection mechanism, preventing water from accumulating on the guide surface 322 and reducing the possibility of water being re-entrained by hot air.

[0028] To prevent moisture from being re-introduced into the hot air, preferably, a hydrophobic plate 324 parallel to the guide surface 322 is provided above the guide surface 322, and the hydrophobic plate 324 is provided with a plurality of water outlet holes 325.

[0029] Specifically, the hydrophobic plate 324 is fixed inside the gas-liquid separation channel 32 by a bracket. Its surface is parallel to and spaced apart from the guide surface 322. The water outlet holes 325 are evenly arranged along the length of the hydrophobic plate 324, and the hole diameter is smaller than the minimum stable diameter of water droplets under gravity. When the liquid water condensed on the surface of the arc-shaped baffle 321 flows along the guide surface 322, the hydrophobic plate 324 prevents the liquid water from being re-entrained by the high-speed hot airflow through its plate surface blocking effect. At the same time, the water outlet holes 325 allow the liquid water to flow into the guide surface 322 through the pores under gravity.

[0030] In one implementation, the material conveying mechanism 2 includes a motor 21, a drive chain shaft 22 connected to the motor 21, and a conveyor belt 23 wound on the drive chain shaft 22; the position of the conveyor belt 23 in the housing 1 is higher than the position of the air inlet 42 of the drying chamber 4.

[0031] Specifically, drive chain shafts 22 are typically located at both ends of the housing 1, with at least two shafts, and conveyor belts 23 are wound around these drive chain shafts 22. When the motor 21 drives the drive chain shafts 22 to rotate, the conveyor belts 23 also move accordingly, thereby achieving continuous material conveying. The conveyor belts 23 are positioned below the inlet and outlet of the housing 1 for convenient loading and unloading of materials. Simultaneously, the height of the conveyor belts 23 is higher than the air inlet 42 of the drying chamber 4. This design prevents materials from obstructing the entry of hot air during conveying, ensuring that hot air is evenly distributed onto the materials and improving drying efficiency. The material of the conveyor belts 23 can be selected according to the characteristics of the materials being dried, such as high-temperature resistant and corrosion-resistant materials. The conveyor belts 23 can also have a mesh structure, which facilitates the penetration of hot air into the materials and improves the drying effect.

[0032] In one implementation, the box-type drying device of this embodiment further includes: a temperature control system installed inside the box 1. The temperature control system includes temperature sensors installed in each of the drying chambers 4 and a temperature controller electrically connected to the temperature sensors. The temperature controller is used to adjust the power of the heat exchanger 31. The temperature sensors monitor the actual temperature in each drying chamber 4 in real time and feed it back to the temperature controller. The temperature controller automatically adjusts the heating power of the heat exchanger 31 by comparing it with preset temperature parameters. When the chamber temperature is lower than the set value, the heat exchanger power is increased to increase the hot air temperature. When the temperature is too high, the power is reduced to ensure that materials with different moisture contents can complete the drying process under the optimal temperature conditions, thereby improving the thermal energy utilization efficiency and avoiding overheating damage to the materials.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A box-type drying device for heat energy recycling, characterized in that, include: Box (1), material conveying mechanism (2) disposed in the box (1) and heat energy circulation mechanism (3) connected to the box (1); The housing (1) is composed of at least two drying chambers (4) spliced ​​together. The number of the heat energy circulation mechanism (3) corresponds to the number of the drying chambers (4). The top of the drying chamber (4) is provided with an air outlet (41) and the front is provided with an air inlet (42). The heat energy circulation mechanism (3) includes a heat exchanger (31), a gas-liquid separation channel (32) and a centrifugal fan (33) connected in sequence to the air inlet (42). The other end of the centrifugal fan (33) is connected to the air outlet (41) adjacent to the drying chamber (4) through a heat energy collection pipe (34).

2. The box-type drying device as described in claim 1, characterized in that, The gas-liquid separation channel (32) has an air inlet and an air outlet on both sides, and the inner wall is provided with an arc-shaped baffle (321) with the concave surface facing the air inlet.

3. The box-type drying device as described in claim 2, characterized in that, The bottom of the gas-liquid separation channel (32) is provided with a guide surface (322) that extends downward from the air inlet side to the air outlet side, and a drain outlet (323) is provided at the bottom end of the guide surface (322).

4. The box-type drying device as described in claim 3, characterized in that, A water-repellent plate (324) parallel to the flow-repellent surface (322) is provided above the flow-repellent surface (322), and a plurality of water outlet holes (325) are provided on the water-repellent plate (324).

5. The box-type drying device as described in claim 3, characterized in that, The guide surface (322) is provided with a liquid receiving tank (326) at a low position, and the drain outlet (323) is opened at the bottom of the liquid receiving tank (326).

6. The box-type drying device as described in claim 1, characterized in that, The material conveying mechanism (2) includes a motor (21), a drive chain shaft (22) connected to the motor (21), and a conveyor belt (23) wound on the drive chain shaft (22); the position of the conveyor belt (23) in the housing (1) is higher than the position of the air inlet (42) of the drying chamber (4).

7. The box-type drying device as described in claim 1, characterized in that, Also includes: The temperature control system installed in the housing (1) includes temperature sensors installed in each of the drying chambers (4) and a temperature controller electrically connected to the temperature sensors. The temperature controller is used to adjust the power of the heat exchanger (31).

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