High-energy-efficiency hot air circulation drying equipment

Abstract

The utility model relates to the technical field of material drying. The high-energy-efficiency hot air circulation drying equipment comprises a conveying mechanism, a drying room erected on the conveying mechanism and a circulating fan arranged on one side of the drying room. A heating box is arranged below the conveying mechanism in the drying room; one side of the heating box is communicated with an air outlet of the circulating fan through an air supply pipeline; the drying room top plate inclines downwards from the middle to the two sides, and arc-shaped liquid collecting grooves are formed in the two side edges of the drying room top plate. The top of the drying room communicates with an air return opening of the circulating fan through an air return pipeline. A transverse plate is further arranged below the top plate and connected with the top plate through a short rod, and a condensation gas collecting channel is formed between the transverse plate and the top plate. According to the utility model, waste heat in waste gas generated by the drying room can be fully utilized, so that heat circulation is realized, and the overall energy consumption is reduced; and meanwhile, the air outlet assembly arranged at the top of the heating box can improve the distribution uniformity of hot air in the whole drying room, and the drying effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of material drying technology, specifically to a high-efficiency hot air circulation drying device. Background Technology

[0002] In the processing of new materials such as carbon fiber prepreg, drying equipment is often required for rapid drying. Traditional drying chambers typically use external hot air blowers to directly blow hot air into the chamber or heating coils installed inside to raise the temperature, thus achieving drying. The exhaust gas is then purified and directly discharged. However, since the exhaust gas contains a large amount of residual heat, directly discharging this residual heat without utilizing it will significantly increase energy consumption. In addition, the uniformity of the distribution of high-temperature gas within existing drying chambers needs improvement. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency hot air circulation drying device that can reduce energy consumption and distribute heat evenly.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is: a high-efficiency hot air circulating drying equipment, including a conveying mechanism, a drying chamber mounted on the conveying mechanism, and a circulating fan installed on one side of the drying chamber;

[0005] A heating box is installed below the conveying mechanism in the drying room, and one side of the heating box is connected to the air outlet of the circulating fan through an air supply pipe.

[0006] The top plate of the drying chamber slopes downward from the middle to both sides, and arc-shaped liquid collection tanks are formed on both sides; the top of the drying chamber is connected to the return air inlet of the circulating fan through a return air duct; a horizontal plate is also provided below the top plate, and the horizontal plate is connected to the top plate by a short rod, forming a condensation gas collection channel between the horizontal plate and the top plate.

[0007] The top of the heating box is provided with several air outlet components that are arranged in a matrix and communicate with the heating box. The air outlet components include a T-shaped vertical pipe and a horizontal pipe. The middle section of the vertical pipe is provided with a rotary joint. The two ends of the horizontal pipe are bent to form bends that are centrally symmetrical around the vertical pipe. The top surface of the horizontal pipe is also provided with several air outlets.

[0008] Preferably, the interior of the heating box is divided into upper and lower layers by a perforated plate, and the lower heating box is equipped with several heating coils; and the air supply duct is connected to the lower layer of the heating box.

[0009] Preferably, the top surface of the heating box corresponding to the air outlet component covering the gap is provided with several fixed air pipes communicating with the heating box.

[0010] Preferably, a drain pipe is provided at the bottom of the liquid collection tank, and the drain pipe is connected to the liquid collection tank.

[0011] Preferably, heat insulation curtains are provided at both ends of the drying room.

[0012] Preferably, a purifier is installed on the return air duct.

[0013] The beneficial effects of this invention are mainly reflected in: it can fully utilize the waste heat in the exhaust gas generated in the drying chamber, achieving heat circulation and reducing overall energy consumption; at the same time, the air outlet component set on the top of the heating box can also improve the uniformity of hot air distribution throughout the drying chamber, thus improving the drying effect. Specifically, during the use of this invention, the material is carried on the conveyor mechanism into the drying chamber, the heating box heats the gas, and the hot air is discharged from the air outlet component, drying the material located on the conveyor mechanism. Due to the reaction force generated by the bends at both ends of the air outlet component during the air discharge process, it can drive the horizontal pipe to rotate at high speed and evenly distribute the hot airflow throughout the drying chamber, resulting in excellent overall drying effect. The exhaust gas generated during drying flows along the condensation and gas collection channel, where moisture condenses and flows along the horizontal plate to the liquid collection tank, while the waste heat gas flows along the return air pipe to the circulating fan and re-enters the circulation under the pumping of the circulating fan. Attached Figure Description

[0014] Figure 1 This is a top view of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the drying room;

[0016] Figure 3 for Figure 2 Enlarged view of section A. Detailed Implementation

[0017] like Figure 1 As shown, this utility model is a high-efficiency hot air circulating drying device for drying materials. It includes a conveying mechanism 1, a drying chamber 2 mounted on the conveying mechanism 1, and a circulating fan 3 located on one side of the drying chamber 2. The conveying mechanism 1 can be in the form of conveying rollers, conveyor belts, etc., depending on the type of material. The material is dried while passing through the drying chamber 2, and the circulating fan 3 is used to circulate and transport the waste heat gas. The two ends of the drying chamber 2 are inlets and outlets, and heat insulation curtains 19 are installed at the inlets and outlets at both ends of the drying chamber 2 to reduce the leakage of hot air.

[0018] like Figure 2As shown in the diagram, a heating box 4 is installed below the conveying mechanism 1 inside the drying chamber 2 of this invention. The function of the heating box 4 is to heat the gas and generate a hot airflow. One side of the heating box 4 is connected to the air outlet of the circulating fan 3 through an air supply pipe 5. The recirculated waste heat gas re-enters the heating box through the air supply pipe 5, is heated to the set temperature, and then discharged.

[0019] To collect exhaust gas and condense the water vapor in the collected gas, the top plate 6 of the drying chamber 2 of this invention slopes downwards from the center to both sides, and arc-shaped liquid collection troughs 7 are formed on both sides. The drain pipe 18 is located at the bottom of the liquid collection trough 7 and is connected to the liquid collection trough 7, through which the condensed liquid can be discharged. The top of the drying chamber 2 is connected to the return air inlet of the circulating fan 3 through the return air duct 8. A horizontal plate 9 is also provided below the top plate 6, and the horizontal plate 9 is connected to the top plate 6 by a short rod, forming a condensation and gas collection channel 10 between the horizontal plate 9 and the top plate 6.

[0020] like Figure 3 As shown, the top of the heating box 4 of this utility model is provided with a plurality of air outlet components arranged in a matrix and communicating with the heating box 4. The air outlet components include a T-shaped vertical pipe 11 and a horizontal pipe 12. A rotary joint is provided in the middle section of the vertical pipe 11. The two ends of the horizontal pipe 12 are bent to form elbows 13 that are centrally symmetrical around the vertical pipe 11. A plurality of air outlets 14 are also provided on the top surface of the horizontal pipe 12.

[0021] In use, the material is carried on the conveyor mechanism 1 and enters the drying chamber 2. The heating box 4 heats the gas, and the hot air is discharged from the air outlet assembly, drying the material on the conveyor mechanism 1. During the air outlet process, the elbows at both ends of the horizontal pipe 12 generate a reaction force, which can drive the horizontal pipe 12 to rotate at high speed and evenly distribute the hot airflow throughout the entire drying chamber 2, resulting in excellent overall drying effect. The exhaust gas generated during drying flows along the condensation and gas collection channel 10, where moisture and other substances condense and flow along the horizontal plate 9 to the liquid collection tank 7. The waste heat gas flows along the return air duct 8 to the circulating fan 3 and re-enters the circulation under the pumping of the circulating fan 3. Of course, a better approach is to install a purifier 20 on the return air duct 8 to purify harmful substances in the waste heat gas.

[0022] During the hot air output process, to further reduce the dead zones of the air output components, several fixed air pipes 17 connected to the heating box 4 are provided on the top surface of the heating box 4 corresponding to the gaps covered by the air output components. To ensure that the airflow is heated after entering the heating box 4 and evenly enters each air output component, the interior of the heating box 4 is divided into upper and lower layers by a perforated plate 15. Several heating coils 16 are provided in the lower heating box 4. The air supply pipe 5 is connected to the lower layer of the heating box 4.

Claims

1. A high-efficiency hot air circulating drying device, comprising a conveying mechanism (1), a drying chamber (2) mounted on the conveying mechanism (1), and a circulating fan (3) disposed on one side of the drying chamber (2); Its features are: A heating box (4) is provided below the conveying mechanism (1) in the drying room (2), and one side of the heating box (4) is connected to the air outlet of the circulating fan (3) through the air supply pipe (5); The top plate (6) of the drying chamber (2) slopes downward from the middle to both sides, and arc-shaped liquid collection tanks (7) are formed on both sides; the top of the drying chamber (2) is connected to the return air inlet of the circulating fan (3) through the return air duct (8); a horizontal plate (9) is also provided below the top plate (6), and the horizontal plate (9) is connected to the top plate (6) through a short rod, forming a condensation gas collection channel (10) between the horizontal plate (9) and the top plate (6); The top of the heating box (4) is provided with a number of air outlet components that are arranged in a matrix and communicate with the heating box (4). The air outlet components include a T-shaped vertical pipe (11) and a horizontal pipe (12) that are connected. A rotary joint is provided in the middle section of the vertical pipe (11). The two ends of the horizontal pipe (12) are bent to form elbows (13) that are centrally symmetrical around the vertical pipe (11). A number of air outlets (14) are also provided on the top surface of the horizontal pipe (12).

2. The high-efficiency hot air circulating drying equipment according to claim 1, characterized in that: The interior of the heating box (4) is divided into upper and lower layers by a perforated plate (15). The lower heating box (4) is equipped with several heating coils (16); and the air supply pipe (5) is connected to the lower layer of the heating box (4).

3. The high-efficiency hot air circulating drying equipment according to claim 2, characterized in that: The top surface of the heating box (4) corresponding to the air outlet component covering the gap is provided with several fixed air pipes (17) that are connected to the heating box (4).

4. The high-efficiency hot air circulating drying equipment according to claim 3, characterized in that: The bottom of the liquid collection tank (7) is provided with a drain pipe (18), which is connected to the liquid collection tank (7).

5. The high-efficiency hot air circulating drying equipment according to claim 4, characterized in that: Insulation curtains (19) are provided at both ends of the drying room (2).

6. The high-efficiency hot air circulating drying equipment according to claim 5, characterized in that: A purifier (20) is installed on the return air duct (8).

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