A novel drying device

Abstract

The utility model discloses a novel drying device, including drying box, the end hinged setting of drying box has the movable door, and the inner side wall of drying box is provided with heat preservation layer, and the sidewall of heat preservation layer is provided with a plurality of electric heating pipes of parallel distribution, and a plurality of electric heating pipes are connected in parallel and are electrically connected with controller through wire, and controller is electrically connected with display screen, and the outside of controller is provided with electric control box, and the inner side wall on both sides of drying box all is provided with the serpentine coil pipe, and the water outlet of serpentine coil pipe, water inlet all pass through the sidewall of drying box, heat preservation layer and set up in the outside of drying box, and water inlet sets up below the water outlet, and the horizontal section pipe way outside of serpentine coil pipe all is provided with fin, and two water inlets are connected with output pipeline through second three -way solenoid valve, first input pipeline, second input pipeline, and output pipeline is provided with booster pump, and the utility model discloses has realized the function of reducing drying cost, improving energy utilization, double -heat -source drying.

Description

Technical Field

[0001] This utility model relates to the field of drying device technology, specifically a new type of drying device. Background Technology

[0002] Traditional silicon carbide product drying relies on electric heating, facing two major technological bottlenecks: First, energy consumption costs remain high. The original drying process consumes up to 1024 kWh per batch. Even with process optimization to shorten the drying time and strengthen insulation measures, it still requires 603 kWh. Moreover, the cost of electricity increases linearly with the increase in order volume. Second, energy utilization is low. The cooling water in the sintering furnace contains a large amount of waste heat, but it is directly discarded when returning to the cooling tower, resulting in significant heat waste. Traditional electric heating drying suffers from problems such as high energy consumption, waste of waste heat, and crude process. Enterprises still rely on electric heating to dry their products, and the waste heat of the sintering furnace cooling water is not utilized.

[0003] Therefore, designing a device that reduces drying costs, improves energy efficiency, and uses dual heat sources for drying is precisely the problem the inventors wanted to solve. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of drying device that can reduce drying costs, improve energy utilization, and achieve dual heat source drying functions.

[0005] The technical solution adopted by this utility model device is as follows: a novel drying device includes a drying chamber, a hinged door at one end of the drying chamber, an insulation layer on the inner side wall of the drying chamber, and a plurality of parallel-distributed electric heating tubes on the side wall of the insulation layer. The plurality of electric heating tubes are connected in parallel and electrically connected to a controller via wires. The controller is electrically connected to a display screen. An electrical control box is located outside the controller. A serpentine coil is installed on the inner side walls of both sides of the drying chamber. The water outlet and inlet of the serpentine coil pass through the side wall of the drying chamber. The insulation layer is located on the outside of the drying chamber, and the water inlet is located below the water outlet. In this configuration, fins are provided on the outer side of the horizontal section of the serpentine coil. The two water inlets are connected to an output pipe via a second three-way solenoid valve, a first input pipe, and a second input pipe. A booster pump is installed on the output pipe. The input end of the output pipe is connected to a second water tank. The second water tank is connected to a first water tank via a connecting pipe and a circulation pump. The inlet end of the first water tank is connected to a four-way solenoid valve via a connecting pipe. The other three ports of the four-way solenoid valve are respectively connected to two sintering furnaces and a first three-way solenoid valve via connecting pipes. The other two ports of the first three-way solenoid valve are respectively connected to two sintering furnaces via connecting pipes.

[0006] Furthermore, the two water outlets are respectively connected to a first return water pipe and a second return water pipe.

[0007] Furthermore, the ends of the first return water pipe and the second return water pipe are connected to the water pool of the cooling tower.

[0008] Furthermore, the output end of the cooling tower is connected to the cooling water input ends of the four sintering furnaces via connecting pipes and water pumps.

[0009] Furthermore, the output end of the sintering furnace is equipped with an electromagnetic proportional valve, which is connected to a front-end temperature sensor via a connecting pipe. The front-end temperature sensor and the electromagnetic proportional valve are electrically connected to the controller via wires.

[0010] Furthermore, the inlet of the first water tank is located on the upper part of the side end face and the outlet is located on the lower part of the circumferential surface. The outlet of the first water tank is connected to a circulation pump through a connecting pipe. The output end of the circulation pump is connected to the inlet of the second water tank through a connecting pipe. The circulation pump is electrically connected to the controller through a wire.

[0011] Furthermore, the inlet of the second water tank is located at the upper end of the circumferential surface and the outlet is located at the lower end of the circumferential surface. A first water temperature sensor is installed inside the first water tank, and a second water temperature sensor is installed inside the second water tank. Both the first and second water temperature sensors are electrically connected to the controller via wires.

[0012] Furthermore, an internal temperature sensor is installed inside the drying chamber, and the internal temperature sensor is electrically connected to the controller via a wire.

[0013] The beneficial effects of this utility model device are:

[0014] 1. This utility model utilizes the waste heat of the circulating cooling water in the sintering furnace to collect and regulate the temperature, and supplies hot water at a stable temperature to the drying box. This replaces electric heating for heat exchange and temperature rise in the low-temperature section of the drying box. After the temperature rises, it switches to electric heating for high-temperature rise, thus achieving the functions of reducing drying costs, improving energy utilization, and dual heat source drying. Attached Figure Description

[0015] Figure 1 This is a structural view of the present invention.

[0016] Figure 2 This is a structural view of the drying oven of this utility model.

[0017] Figure 3 This is a structural view of the transfer box of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1-Sintering furnace; 2-Front-end temperature sensor; 3-First three-way solenoid valve; 4-Main pipe; 5-Four-way solenoid valve; 6-First water tank; 7-Second water tank; 8-Booster pump; 9-Output pipe; 10-Second three-way solenoid valve; 11-First input pipe; 12-Second input pipe; 13-First return water pipe; 14-Second return water pipe; 15-Drying oven; 16-Insulation layer; 17-Serpentine coil; 18-Fin; 19-Outlet; 20-Electrical control box; 21-Heating element; 22-Circulation pump; 23-First water temperature sensor; 24-Second water temperature sensor; 25-Inlet. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] See Figures 1 to 3 This utility model includes structural views of the drying oven 15 and the transfer box. It is a novel drying device, comprising a drying oven 15 with a hinged door at one end. The inner wall of the drying oven 15 is provided with an insulation layer 16. As a conventional device for drying silicon carbide products, the drying oven 15 has an internal ventilation mechanism for air circulation and humidity control. An internal temperature sensor is also provided to monitor the temperature inside the cavity in real time. Generally, at least three internal temperature sensors are provided for multi-point detection and more accurate feedback of the internal temperature. Several parallel heating tubes 21 are arranged on the side wall of the insulation layer 16. These heating tubes 21 are connected in parallel and electrically connected to a controller via wires. The controller is electrically connected to a display screen. An electrical control box 20 is located outside the controller. When the wiring and piping inside the cavity pass through the side wall, the holes are filled with sealing material. The controller can control the heating of the heating tubes 21. The internal temperature sensors are electrically connected to the controller via wires.

[0021] Both sides of the drying oven 15 are equipped with serpentine coils 17. The outlet 19 and inlet 25 of the serpentine coils 17 pass through the side walls of the drying oven 15. The insulation layer 16 is located on the outside of the drying oven 15. The inlet 25 is located below the outlet 19. Fins 18 are provided on the outside of the horizontal section of the serpentine coils 17. Ordinary coils have slow heat exchange efficiency. Therefore, the coils with fins 18 are used as the main material of the coils. The fins 18 can play the same role as the heat sink on the radiator, accelerating heat exchange and improving heat exchange efficiency. The bottom inlet and top outlet countercurrent heat exchange efficiency is even higher.

[0022] Two water inlets 25 are connected to an output pipe 9 via a second three-way solenoid valve 10, a first input pipe 11, and a second input pipe 12. A booster pump 8 is installed on the output pipe 9. The input end of the output pipe 9 is connected to a second water tank 7. The second water tank 7 is connected to a first water tank 6 via a connecting pipe and a circulation pump 22. The inlet end of the first water tank 6 is connected to a four-way solenoid valve 5 via a connecting pipe. The other three ports of the four-way solenoid valve 5 are connected to two sintering furnaces 1 and a first three-way solenoid valve 3 via connecting pipes. The other two ports of the first three-way solenoid valve 3 are connected to two sintering furnaces 1 via connecting pipes. An electromagnetic proportional valve is installed at the output end of the sintering furnace 1. The electromagnetic proportional valve is connected to a front-end temperature sensor 2 via a connecting pipe. The front-end temperature sensor 2 and the electromagnetic proportional valve are electrically connected to the controller via wires.

[0023] The inlet of the first water tank 6 is located on the upper part of the side end face and the outlet is located on the lower part of the circumferential surface. The outlet of the first water tank 6 is connected to a circulation pump 22 through a connecting pipe. The output end of the circulation pump 22 is connected to the inlet of the second water tank 7 through a connecting pipe. The circulation pump 22 is electrically connected to the controller through a wire. The inlet of the second water tank 7 is located on the upper end of the circumferential surface and the outlet is located on the lower end of the circumferential surface. A first water temperature sensor 23 is installed inside the first water tank 6 and a second water temperature sensor 24 is installed inside the second water tank 7. Both the first water temperature sensor 23 and the second water temperature sensor 24 are electrically connected to the controller through wires.

[0024] To provide a stable heat source for the drying chamber 15, cooling water from the four sintering furnaces 1 is drawn into the main pipe 4 after cooling. The water collected in the main pipe 4 then enters the first water tank 6. The first water tank 6 serves as a transfer point and regulates the temperature of the mixed water to reach 80℃. Water that reaches the required temperature then enters the second water tank 7 via the circulation pump 22, where it is pressurized before entering the drying chamber 15 for heat exchange and drying. After entering the first water tank 6, the cooling water is sensed by the first water temperature sensor 23 and fed back to the controller. The controller aggregates the temperature data from the four front-end temperature sensors 2. If the water temperature in the first water tank 6 is lower than 80℃, the controller... The controller will reduce the flow rate of the cooling water outlet at the side with the lower temperature among the four sintering furnaces 1, and increase the flow rate of the side with the higher temperature, thereby balancing the water temperature and controlling its rise. If the water temperature in the first water tank 6 is higher than 85℃, the controller will reduce the flow rate of the cooling water outlet at the side with the higher temperature among the four sintering furnaces 1, and increase the flow rate of the side with the lower temperature, thereby balancing the water temperature and controlling its rise. This ensures that the water temperature in the first water tank 6 is always maintained at a balanced value between 78℃ and 85℃, while the outlet water temperature of the four sintering furnaces 1 generally fluctuates between 75℃ and 85℃.

[0025] After the water reaches the required temperature and enters the second water tank 7, it is drawn into the drying chamber 15 by a pressurized pump for drying and heat exchange. The water enters the coil from the inlet 25, flows from bottom to top, and passes through the fins 18 for heat dissipation and exchange before leaving from the outlet 19. This heat exchange process continues until the temperature inside the chamber reaches 65°C. Then, the chamber switches to electric heating mode to continue heating and drying, which can save a lot of energy consumption and significantly reduce drying costs.

[0026] The first three-way solenoid valve 3 and the four-way solenoid valve 5 can connect and disconnect the ports and connect the main pipeline 4 according to the production and processing status of the four sintering furnaces 1. The connection of the sintering furnace 1 that is not in use can be directly cut off without connecting to the main pipeline 4.

[0027] Two outlets 19 are respectively connected to a first return water pipe 13 and a second return water pipe 14. The ends of the first return water pipe 13 and the second return water pipe 14 are connected to the water pool of the cooling tower. The output end of the cooling tower is connected to the cooling water input end of the four sintering furnaces 1 through connecting pipes and water pumps. After heat exchange, the water enters the cooling tower for cooling and then circulates back into the sintering furnace 1 for cooling operation.

[0028] In terms of process optimization and intelligent control, a segmented drying strategy is adopted. In the low-temperature 40℃ preheating stage, the valve set at the water inlet 25 of the drying box 15 is closed to remove free water on the surface of the billet using low-temperature residual heat. In the medium-temperature 60℃ rapid drying stage, the valve set at the water inlet 25 of the drying box 15 is opened to continuously use high-temperature residual heat to accelerate moisture migration. In the high-temperature 100℃ stage, the second and third solenoid valves 10 of the water inlet 25 are automatically closed to stop hot water supply and start electric heating drying.

[0029] In terms of energy consumption, waste heat replaces more than 70% of electric heating energy consumption, and the power consumption per batch is reduced from 603 kWh to less than 150 kWh, achieving a high efficiency utilization rate of more than 80% of the waste heat from the cooling water of sintering furnace 1.

[0030] This invention utilizes the waste heat of the circulating cooling water in the sintering furnace 1 to collect and regulate the temperature, and supplies hot water at a stable temperature to the drying chamber 15. This replaces electric heating for low-temperature heat exchange and temperature rise in the drying chamber 15. After the temperature rises, it switches to electric heating for high-temperature temperature rise, thus achieving the functions of reducing drying costs, improving energy utilization, and dual-heat source drying.

Claims

1. A novel drying device, comprising a drying box (15), the end of the drying box (15) is hingedly provided with a movable door, the inner side wall of the drying box (15) is provided with a heat preservation layer (16), a plurality of electric heating pipes (21) are arranged on the side wall of the heat preservation layer (16) in parallel, the plurality of electric heating pipes (21) are connected in parallel and are electrically connected with a controller through wires, the controller is electrically connected with a display screen, and an electric control box (20) is arranged outside the controller, characterized in that: The inner walls on both sides of the drying chamber (15) are provided with serpentine coils (17). The outlet (19) and inlet (25) of the serpentine coils (17) pass through the side walls of the drying chamber (15). The insulation layer (16) is located on the outside of the drying chamber (15). The inlet (25) is located below the outlet (19). The horizontal section of the serpentine coils (17) is provided with fins (18). The two inlets (25) are connected to the outlet pipe (9) through the second three-way solenoid valve (10), the first input pipe (11), and the second input pipe (12). A booster pump (8) is installed on the output pipe (9). The input end of the output pipe (9) is connected to a second water tank (7). The second water tank (7) is connected to a first water tank (6) through a connecting pipe and a circulation pump (22). The inlet end of the first water tank (6) is connected to a four-way solenoid valve (5) through a connecting pipe. The other three ports of the four-way solenoid valve (5) are respectively connected to two sintering furnaces (1) and a first three-way solenoid valve (3) through connecting pipes. The other two ports of the first three-way solenoid valve (3) are respectively connected to two sintering furnaces (1) through connecting pipes.

2. The novel drying device according to claim 1, characterized in that: The two water outlets (19) are respectively connected to the first return water pipe (13) and the second return water pipe (14).

3. The novel drying device according to claim 2, characterized in that: The ends of the first return water pipe (13) and the second return water pipe (14) are connected to the water pool of the cooling tower.

4. The novel drying device according to claim 3, characterized in that: The output end of the cooling tower is connected to the cooling water input ends of the four sintering furnaces (1) via connecting pipes and water pumps.

5. A novel drying device according to claim 4, characterized in that: The output end of the sintering furnace (1) is equipped with an electromagnetic proportional valve. The electromagnetic proportional valve is connected to a front-end temperature sensor (2) through a connecting pipe. The front-end temperature sensor (2) and the electromagnetic proportional valve are electrically connected to the controller through wires.

6. The novel drying apparatus according to claim 1, characterized in that: The inlet of the first water tank (6) is located on the upper part of the side end face and the outlet is located on the lower part of the circumferential surface. The outlet of the first water tank (6) is connected to a circulation pump (22) through a connecting pipe. The output end of the circulation pump (22) is connected to the inlet of the second water tank (7) through a connecting pipe. The circulation pump (22) is electrically connected to the controller through a wire.

7. A novel drying apparatus according to claim 6, characterized in that: The inlet of the second water tank (7) is located at the upper end of the circumferential surface and the outlet is located at the lower end of the circumferential surface. The first water tank (6) is provided with a first water temperature sensor (23) inside, and the second water tank (7) is provided with a second water temperature sensor (24) inside. The first water temperature sensor (23) and the second water temperature sensor (24) are both electrically connected to the controller through wires.

8. A novel drying device according to claim 1, characterized in that: The drying oven (15) is equipped with an internal temperature sensor, which is electrically connected to the controller via a wire.

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