Anti-explosion infrared heating module

Abstract

The invention discloses an anti-explosion infrared heating module which comprises an infrared heating lamp tube serving as a heat source, a jacketed pipe arranged outside the infrared heating lamp tube and a cooling chamber formed in the jacketed pipe, a transparent refrigerant flows in the cooling chamber for cooling, and the refrigerant adopts a potassium chloride aqueous solution with the mass percent concentration of 5.0-23.3%. The device has the advantages of being high in heat energy utilization efficiency, high in cooling efficiency, good in safety, good in process adjustability, simple in structure and the like, can be applied according to low-temperature requirements or explosive occasions, is not limited to drying of new energy battery cathode materials, but also can be applied to chemical engineering, material treatment and other heat treatment processes needing explosion prevention, and is suitable for industrial production. And the method has a wide application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of heating devices, and in particular to an explosion-proof infrared heating module. Background Art

[0002] The processing and manufacturing of cathode materials for new energy batteries includes steps such as raw material preparation, mixing, slurry preparation, coating, drying, sintering and post-processing. Among them, the three steps of slurry preparation, coating and drying are as follows: using a solvent to mix the mixed solid materials to make a uniform slurry; using knife coating, roller coating or scraping coating to evenly coat the prepared slurry on the electrode substrate; heating and drying the coated cathode material to remove the solvent to form a stable electrode structure.

[0003] Among them, N-methylpyrrolidone (NMP) has good solubility and is often used as a solvent in the production of cathode materials. However, it has a low flash point (about 86°C) and is easy to volatilize in high temperature environments, and even produces flammable gases. Based on this, hot air drying processes are currently used to meet safety requirements. However, hot air drying is a secondary heat transfer method that uses convection and heat conduction, so it has defects such as low heat transfer efficiency, large heat loss, and high energy consumption. In addition, there are problems such as inconvenient process adjustment, high noise, and bulky equipment. In comparison, infrared thermal radiation is a primary heat transfer method that directly acts on the surface of an object. It has high energy efficiency and low heat loss. It can quickly increase the temperature of the object and achieve rapid drying. In addition, the heating process parameters can be easily adjusted by adjusting the voltage or current. On the other hand, the surface temperature of the infrared lamp tube usually exceeds the safe temperature (the flash point of NMP), so the existing infrared lamp tube is difficult to be directly used in specific occasions with explosion-proof requirements or safe working temperature limits.

[0004] Patent document CN116170904A (application publication date 2023.05.26) discloses an explosion-proof infrared lamp heating module, which is provided with an explosion-proof quartz glass shell and a stainless steel reflector outside the infrared heating lamp tube. The stainless steel reflector partially covers the explosion-proof quartz glass shell, and the two directly form a cooling cavity. The stainless steel reflector area is cooled by the flow of cold air or coolant, thereby indirectly cooling the irradiation area of ​​the explosion-proof quartz glass shell, and finally controlling the surface temperature of the irradiation area of ​​the explosion-proof quartz glass shell to 180°C. The heating module cannot directly cool the irradiation area of ​​the explosion-proof quartz glass shell, so the cooling efficiency is low, and the surface temperature of the heating module cannot meet the safety requirements (86°C) for drying in the processing of cathode materials for new energy batteries. Summary of the invention

[0005] In order to achieve efficient and safe heating and drying of cathode materials for new energy batteries, the present invention provides an explosion-proof infrared heating module.

[0006] The technical solution adopted by the present invention is as follows: an explosion-proof infrared heating module, comprising: an infrared heating lamp tube as a heat source; a transparent jacket tube arranged outside the infrared heating lamp tube; a cooling chamber, an annular space formed inside the jacket tube; a liquid inlet and a liquid outlet, arranged at both ends of the cooling chamber; a transparent refrigerant flows into the cooling chamber from the liquid inlet and flows out from the liquid outlet; the refrigerant adopts a potassium chloride aqueous solution with a mass percentage concentration of 5.0~23.3%.

[0007] Preferably, the thickness of the cooling chamber in the cross section is 5-10 mm.

[0008] Preferably, the refrigerant is a potassium chloride aqueous solution with a mass percentage concentration of 16.7-20.0%.

[0009] Preferably, it further comprises: a fixing block installed at both ends of the jacket tube; and a sealing member provided between the clamping opening of the fixing block and the outer wall of the jacket tube.

[0010] Preferably, the fixing block is assembled from two clamping blocks, the clamping block has a semicircular notch, and the two semicircular notches form a clamping opening that matches the jacket tube.

[0011] Preferably, the liquid inlet and the liquid outlet are perpendicular to the axial direction of the jacket tube and are arranged at an angle of 180°.

[0012] Preferably, it further comprises: a reflective cover installed on the outer wall of the jacket tube, and the exposed portion of the jacket tube forms an irradiation area.

[0013] Preferably, multiple groups in a single row are used in parallel.

[0014] Preferably, it is used as heating in low temperature requirements or explosive occasions.

[0015] The present invention has the following beneficial effects: 1. High cooling efficiency and good safety: By setting a transparent jacket pipe, an annular cooling chamber is formed, and the refrigerant flows inside the cooling chamber, which can effectively control the outer surface temperature of the jacket pipe and improve the safety of the working environment; 2. High efficiency of heat energy utilization: The infrared heating lamp adopts infrared heat radiation technology, which can directly heat the surface of the object. The potassium chloride aqueous solution with a specific concentration is selected as the refrigerant, which has high permeability to infrared rays, further reducing heat loss and achieving rapid drying; 3. Good process adjustability: By adjusting the voltage or current of the infrared heating lamp, the radiation intensity can be flexibly adjusted. On this basis, by controlling the flow rate or temperature of the refrigerant, the surface temperature of the outer surface of the jacket tube can be adjusted, thereby meeting the different requirements for drying speed and temperature control in different heating scenarios; 4. Structural optimization: simple structure, easy to install and maintain, the fixed block facilitates the combined use of multiple heating modules, and can be installed and applied in different heating equipment; 5. Wide adaptability: It can be applied according to low temperature requirements or explosive occasions. It has a wide range of applications. It is not only limited to the drying of cathode materials for new energy batteries, but can also be widely used in other heat treatment processes that require explosion-proof, such as chemical industry and material processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of the present invention.

[0017] Figure 2 It is a cross-sectional schematic diagram of embodiment 1 of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the first embodiment of the present invention.

[0019] Figure 4 It is a cross-sectional schematic diagram of the second embodiment of the present invention.

[0020] Figure 5 It is a three-dimensional schematic diagram of embodiment 3 of the present invention.

[0021] Infrared heating lamp tube 1; jacket tube 2; cooling chamber 3; liquid inlet 4; liquid outlet 5; fixing block 6; sealing element 7; reflecting cover 8. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the embodiments and drawings.

[0023] In the embodiment, Figure 1~Figure 3 As shown, an explosion-proof infrared heating module includes: an infrared heating lamp 1 as a heat source; a transparent jacket tube 2, which is arranged outside the infrared heating lamp 1; a cooling chamber 3, which is formed in an annular space inside the jacket tube 2; a liquid inlet 4 and a liquid outlet 5, which are arranged at both ends of the cooling chamber 3; a transparent refrigerant flows into the cooling chamber 3 from the liquid inlet 4 and flows out from the liquid outlet 5; the liquid inlet 4 and the liquid outlet 5 are connected to the external liquid supply system to achieve circulation. In this embodiment, a transparent jacket tube 2 made of materials such as quartz glass is arranged to form an annular cooling chamber 3, and the refrigerant flows inside the cooling chamber 3 to achieve circulating cooling, which can effectively control the outer surface temperature of the jacket tube 2 at 150°C or even lower. Therefore, it can be directly used in the drying step of the processing and manufacturing of cathode materials for new energy batteries. In addition, it can also be widely used in other heat treatment processes that require explosion-proof, such as chemical industry and material processing. In addition, by adjusting the voltage or current of the infrared heating lamp 1, the radiation intensity can be flexibly adjusted. On this basis, by controlling the flow rate or temperature of the refrigerant, the surface temperature of the outer surface of the jacket tube 2 can be adjusted, thereby meeting different requirements for drying speed and temperature control in different heating scenarios.

[0024] In the first embodiment, Figure 2 As shown in the figure, the thickness dimension d of the cooling chamber 3 on the cross section is 5~10mm, and the refrigerant in the cooling chamber 3 is a potassium chloride aqueous solution. The infrared heating lamp 1 is irradiated with potassium chloride solutions of different mass percentage concentrations (5.0~23.3%) and different thicknesses (5mm, 10mm), and the infrared transmittance data is tested. As shown in the table below, when the thickness dimension d of the cooling chamber 3 on the cross section is controlled to be 5~10mm, the use of a potassium chloride aqueous solution with a mass percentage concentration of 16.7~20.0% will obtain better infrared transmittance. After the infrared heating lamp 1 passes through the cooling chamber 3, the infrared radiation directly radiates to the surface of the heated object, with small heat loss and high heat utilization, which can achieve rapid drying.

[0025]

[0026] In the first embodiment, Figure 1 , Figure 3 As shown, it also includes: a fixing block 6 installed at both ends of the jacket tube 2; and a sealing member 7 arranged between the clamping opening of the fixing block 6 and the outer wall of the jacket tube 2. In addition to cooling, the jacket tube 2 of this embodiment also serves as an explosion-proof shield for the infrared heating lamp tube 1, and the sealing member 7 serves to isolate the combustible gas, further improving the explosion-proof safety performance.

[0027] In the first embodiment, Figure 1 , Figure 3 As shown, the fixing block 6 is also comprised of two clamping blocks 601, the clamping block 601 has a semicircular notch 602, and the two semicircular notches 602 form a clamping opening that matches the jacket tube 2. The fixing block 6 of the assembled structure is more convenient for installation and matching with the jacket tube 2 and the sealing member 7, convenient for disassembly and maintenance, more firm and airtight, not easy to loosen, and has better sealing performance.

[0028] In the first embodiment, Figure 1 , Figure 3 As shown, the liquid inlet 4 and the liquid outlet 5 are perpendicular to the axial direction of the jacket tube 2 and are arranged at an angle of 180°. This design can optimize the flow characteristics of the refrigerant, help to form a good liquid circulation and flow, can effectively improve the heat exchange efficiency of the refrigerant, and avoid the local temperature of the infrared heating lamp 1 being too high due to the dead angle of the liquid flow inside the cooling chamber 3. In addition, it also makes the structure more compact.

[0029] In the second embodiment, Figure 4As shown, it also includes: a reflective cover 8, which is installed on the outer wall of the jacket tube 2, and the exposed part of the jacket tube 2 forms an irradiation area. The reflective cover 8 can be made of a high-reflectivity material or a material coated with a reflective coating. Compared with the first embodiment, the reflective cover 8 can concentrate more infrared radiation energy in the target heating area to improve the heating efficiency. The presence of the reflective cover 8 also helps to protect the surrounding environment, reduce heat loss, and improve the energy efficiency of the entire heating module. In addition, the reflective cover 8 can be set to a structure that rotates relative to the jacket tube 2 to adjust the light output direction, so that the heating module can choose to output light downward / leftward / rightward or to a specific angle without adjusting the installation structure of the infrared heating lamp tube 1.

[0030] In the third embodiment, Figure 5 As shown, the heating modules are used in parallel in a single row in the vertical direction. In actual production, it is usually necessary to heat and dry a larger area simultaneously, so multiple heating modules can be used in combination. The single-row parallel design enables the heating modules to effectively save space during installation, and is suitable for use in environments with limited space. At the same time, it can ensure that the heat distribution during the heating process is more uniform, improve the temperature consistency of the target heating area, and reduce the risk of local overheating or underheating. In addition, the parallel design can easily increase or decrease the number of modules opened as needed, flexibly respond to different heating requirements, and make it more adaptable and expansible. Among them, the fixed block 6 can limit and fix the adjacent heating modules, making each group of modules easy to install and maintain, which helps to improve the reliability of the equipment and reduce maintenance costs.

[0031] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. An explosion-proof infrared heating module, characterized in that: include: Infrared heating lamp (1) as a heat source; A transparent jacket tube (2) arranged outside the infrared heating lamp tube (1); A cooling chamber (3), formed as an annular space inside the jacket tube (2); A liquid inlet (4) and a liquid outlet (5) are arranged at two ends of the cooling chamber (3); The transparent refrigerant flows into the cooling chamber (3) from the liquid inlet (4) and flows out from the liquid outlet (5); The refrigerant is a potassium chloride aqueous solution with a mass percentage concentration of 5.0-23.3%.

2. The explosion-proof infrared heating module according to claim 1, characterized in that: The thickness of the cooling chamber (3) in the cross section is 5 to 10 mm.

3. The explosion-proof infrared heating module according to claim 1, characterized in that: The refrigerant is a potassium chloride aqueous solution with a mass percentage concentration of 16.7-20.0%.

4. The explosion-proof infrared heating module according to claim 1, characterized in that: Also includes: Fixed blocks (6) are mounted on both ends of the jacket tube (2); A sealing member (7) is arranged between the clamping opening of the fixing block (6) and the outer wall of the jacket tube (2).

5. The explosion-proof infrared heating module according to claim 4, characterized in that: Also includes: The fixing block (6) is assembled from two clamping blocks (601), wherein the clamping block (601) has a semicircular notch (602), and the two semicircular notches (602) form a clamping opening that matches the jacket tube (2).

6. The explosion-proof infrared heating module according to claim 1, characterized in that: Also includes: The liquid inlet (4) and the liquid outlet (5) are perpendicular to the axial direction of the jacket tube (2) and are arranged at an angle of 180°.

7. The explosion-proof infrared heating module according to claim 1, characterized in that: Also includes: A reflective cover (8) is mounted on the outer wall of the jacket tube (2), and the exposed portion of the jacket tube (2) forms an irradiation area.

8. The explosion-proof infrared heating module according to claim 1, characterized in that: Use multiple groups in a single row in parallel.

9. The explosion-proof infrared heating module according to claim 1, characterized in that: Used as heating in low temperature requirements or explosive environments.

Images