Drying oven air heat recovery device

Abstract

The utility model discloses a drying oven air heat recovery device which comprises a heating box (1), an air outlet pipe (2) and an air inlet pipe (3) are arranged on the heating box (1), an exhaust pipe (4) is arranged on the air inlet pipe (3), an air supplementing pipe (5) is arranged on the heating box (1), a heat exchanger (6) is arranged between the air supplementing pipe (5) and the exhaust pipe (4), and a heater (7) is arranged in the middle of the heating box (1). The air inlet pipe (3) and the air outlet pipe (2) are located on the two sides of the heater (7), and an air supplementing opening (11) is formed in the heating box (1). Gas with temperature and cold air entering the heating box (1) through the air supplementing pipe (5) are stored in the exhaust pipe (4) used for removing impurities in the air, heat exchange is conducted between the temperature of exhausted waste gas and the supplemented cold air through the heat exchanger (6), the temperature of the supplemented cold air is increased, and heat loss is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of drying technology. Specifically, this utility model relates to a device for recovering heat from the air in an oven. Background Technology

[0002] After the paper and fabric are produced by the coating machine, the surface of the paper and fabric will be coated with paint and dye. In order to improve the quality of the finished product and avoid the paint and dye flowing on the surface of the paper and fabric, resulting in poor appearance, the processed fabric is usually dried by a dryer to accelerate the drying process.

[0003] A patent application with patent number 202021867708.4, published on June 29, 2021, discloses a coating drying device. The device includes a drying chamber with an inlet for the metal substrate to enter and an outlet for the metal substrate to exit, forming a transport path between the inlet and outlet. An electromagnetic coil for generating a magnetic field is installed inside the drying chamber, and the transport path passes through the magnetic field. This coating drying device causes the metal substrate to self-heat, allowing the slurry on the substrate surface to dry from the inside out. This effectively prevents the formation of a hard film on the slurry surface, ensures the smooth evaporation of solvents inside the slurry, and improves drying efficiency and coating quality. It is also highly efficient and energy-saving, employing internal heating for very rapid start-up, greatly improving coating production efficiency.

[0004] In existing technologies, the exhaust gas discharged after drying is usually reheated to recover heat and avoid waste. However, since the dried gas usually contains water vapor or evaporated paint, directly recovering this gas will affect the normal drying effect. Generally, the method of exhausting the gas and adding fresh air is used to reduce the amount of water vapor and pollutants in the exhaust gas and ensure the quality of drying. However, the temperature of the added air must be lower than that of the exhaust gas, thus increasing the amount of energy required for heating. Utility Model Content

[0005] The present invention aims to provide an oven air heat recovery device that recovers heat from waste gas and reduces energy waste.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an oven air heat recovery device, including a heating box, an air outlet pipe and an air inlet pipe on the heating box, an exhaust pipe on the air inlet pipe, a make-up air pipe on the heating box, and a heat exchanger between the make-up air pipe and the exhaust pipe.

[0007] A heater is provided in the middle of the heating box, and the air inlet pipe and air outlet pipe are located on both sides of the heater.

[0008] The top of the heating box is equipped with a blower connected to the exhaust pipe.

[0009] The heating chamber is divided into a cold air zone and a hot air zone. The air outlet pipe is located in the hot air zone, and the air inlet pipe is located in the cold air zone.

[0010] The heat exchanger is located at the top of the heating chamber and at the top of the cooling zone.

[0011] The air inlet pipe and the air outlet pipe are connected to the oven.

[0012] The heating box is equipped with an air inlet, which is located in the cold air zone.

[0013] The heating box is equipped with a drive motor and a blower connected to the drive motor, and the blower is located in the hot air zone.

[0014] The technical effect of this utility model is as follows: the exhaust pipe used to remove impurities in the air contains gas that still retains its temperature. The gas enters the heating box through the air replenishment pipe and the cold air is heated by the heat exchanger, thereby increasing the temperature of the cold air and reducing heat loss. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 This is a schematic diagram of the structure of an oven air heat recovery device according to the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the cold air zone and hot air zone of a type of oven air heat recovery device.

[0018] The following are marked in the diagram: 1. Heating box; 2. Air outlet pipe; 3. Air inlet pipe; 4. Exhaust pipe; 5. Air supply pipe; 6. Heat exchanger; 7. Heater; 8. Blower; 9. Cold air zone; 10. Hot air zone; 11. Air supply port; 12. Drive motor; 13. Blower wheel. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0020] Please see Figure 1-2An oven air heat recovery device includes a heating chamber, an air outlet pipe and an air inlet pipe on the heating chamber, an exhaust pipe on the air inlet pipe, a make-up air pipe on the heating chamber, and a heat exchanger between the make-up air pipe and the exhaust pipe. The exhaust pipe, which is used to remove impurities from the air, contains gas that still retains its temperature. Cold air enters the heating chamber through the make-up air pipe. The heat exchanger exchanges the temperature of the exhaust gas with the make-up cold air, thereby increasing the temperature of the make-up cold air and reducing heat loss.

[0021] A heater is located in the middle of the heating chamber, with an air inlet pipe and an air outlet pipe on both sides of the heater. The heater heats the cold air inside the heating chamber to dry the processed paper and fabric.

[0022] The top of the heating chamber is equipped with a blower connected to the exhaust pipe; the blower draws in some of the dried gas and sends it into the intake pipe, which can reduce the content of dirt and moisture in the circulating gas, achieve a partial filtration effect, and improve the drying quality.

[0023] The heating chamber is divided into a cold air zone and a hot air zone. The air outlet pipe is located in the hot air zone, and the air inlet pipe is located in the cold air zone. The cold air zone contains the drying gas that enters the heating chamber through the air inlet pipe and is kept at a constant temperature. The hot air zone contains the gas that has been heated by the heater and is sent out through the air outlet pipe for drying, forming a cycle.

[0024] The heat exchanger is located at the top of the heating chamber and the top of the cooling zone; this further reduces the overall footprint, eliminates the need for additional supports to fix the heat exchanger, and allows the exhaust pipe to be installed along the top surface of the heating chamber, reducing costs. Meanwhile, the air supplied into the heating chamber through the heat exchanger is located in the cooling zone and can be heated by the heater.

[0025] The air inlet and outlet pipes are connected to the drying oven; the heated air is sent into the drying oven through the outlet pipe to dry the paper and fabric, and the dried exhaust gas is sent back into the heating chamber through the inlet pipe for reheating.

[0026] The heating chamber is equipped with an air inlet located in the cold air zone; air is supplied through the air inlet to assist in air replenishment, and when the air pressure is low, gas is supplied through the air inlet.

[0027] The heating chamber is equipped with a drive motor and a blower connected to the drive motor. The blower is located in the hot air zone and air is delivered through the blower.

[0028] The technical effect of this utility model is as follows: the exhaust pipe used to remove impurities in the air contains gas that still retains its temperature. The gas enters the heating box through the air replenishment pipe and the cold air is heated by the heat exchanger, thereby increasing the temperature of the cold air and reducing heat loss.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A heat recovery device for oven air, characterized in that: It includes a heating box (1), which is provided with an air outlet pipe (2) and an air inlet pipe (3). The air inlet pipe (3) is provided with an exhaust pipe (4). The heating box (1) is provided with a supplementary air pipe (5). A heat exchanger (6) is provided between the supplementary air pipe (5) and the exhaust pipe (4).

2. The oven air heat recovery device according to claim 1, characterized in that: The heating box (1) is equipped with a heater (7) in the middle, and the air inlet pipe (3) and air outlet pipe (2) are located on both sides of the heater (7).

3. The oven air heat recovery device according to claim 1, characterized in that: The top of the heating box (1) is equipped with a blower (8) connected to the exhaust pipe (4).

4. The oven air heat recovery device according to claim 1, characterized in that: The heating box (1) is divided into a cold air zone (9) and a hot air zone (10). The air outlet pipe (2) is located in the hot air zone (10), and the air inlet pipe (3) is located in the cold air zone (9).

5. The oven air heat recovery device according to claim 4, characterized in that: The heat exchanger (6) is located on top of the heating box (1) and on top of the cold air zone (9).

6. The oven air heat recovery device according to claim 1, characterized in that: The air inlet pipe (3) and the air outlet pipe (2) are connected to the oven.

7. The oven air heat recovery device according to claim 4, characterized in that: The heating box (1) is provided with an air inlet (11), which is located in the cold air zone (9).

8. The oven air heat recovery device according to claim 4, characterized in that: The heating box (1) is equipped with a drive motor (12) and a blower wheel (13) connected to the drive motor (12), and the blower wheel (13) is located in the hot air zone (10).

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