The utility model relates to technology and equipment in the field of microwave drying, especially to drying technology and equipment for ceramic products in the ceramic industry.
Technical Background Reducing energy consumption, reducing pollution, and improving the drying and firing quality of ceramic products are issues of great concern to the ceramic industry. Traditional heating methods are used to dry ceramics and other products. No matter what heating energy is used, ceramic products absorb external heat energy by heating their surfaces and then conduct it to the inside. Since ceramic materials are poor conductors of heat, localized heat can easily occur inside them. Temperature difference phenomenon can easily cause ceramic products to deform, crack, break, etc. during the drying process, resulting in a high defective rate of ceramic products, poor overall quality, and low-grade ceramic products.
When using microwaves to dry ceramic products, the polar molecules on the ceramic surface and inside will oscillate about billions of times per second. The polar molecules overcome the interaction forces between molecules and the Thermal movement resistance produces friction effect to accumulate thermal energy. At this time, heat is generated inside and outside the ceramic at the same time. The whole ceramic heats up rapidly, polar molecules such as water molecules vaporize, and thermal energy is released from the inside of the ceramic to the outside. The heating process of the ceramic is the process of water discharge, thereby achieving the purpose of drying the ceramic. The use of microwave heating not only has high drying efficiency and drying quality, but also reduces energy consumption and basically has no pollution. Therefore, microwave drying equipment has good development prospects in drying treatment in the ceramic industry.
Chinese patent CN1360674 discloses an equipment capable of continuously drying ceramic products. It includes a microwave heating chamber with an inlet end and an outlet end and a ceramic material flow axis, and the ceramics are heated along the axis; a A microwave source that guides microwave power into the microwave heating chamber; a first attenuation chamber disposed near the entrance end of the microwave heating chamber and a second attenuation chamber disposed at the exit end of the microwave heating chamber; a microwave source with a material pipeline and a position close to the first attenuation chamber an inlet chamber, in which at least a portion of the material flow line is at an angle relative to the flow axis; an outlet chamber having a second material flow line and located adjacent to the second attenuation chamber, wherein at least a portion of the second flow line is at an angle relative to the flow axis; a ceramic article for successively The transmission system of ground transmission through the entrance chamber, the first attenuation chamber, the microwave heating chamber, the second attenuation chamber and the exit chamber. There is a microwave attenuation chamber on each side of the microwave drying chamber. At the same time, when the ceramic assembly line enters the microwave drying equipment, it must maintain a certain angle with the axis of the microwave drying equipment, which makes the equipment occupy a larger space. This invention uses a microwave heating source. Although its microwave heating power is adjustable, the entire heating chamber is always at a preset uniform temperature, which cannot meet the needs of general ceramic products that require the heating temperature and speed to change as required at different stages of the assembly line (if installed on the assembly line Multiple sets of equipment will result in repeated settings of the microwave suppressor, and the heating effect and equipment cost will be too high). At the same time, the conveying device contains multiple air support forming brackets, and the conveying equipment is relatively complicated; there is no special dehumidification equipment in this equipment. , so its drying efficiency is low, and its drying effect needs to be further improved, which is not conducive to the entire ceramic manufacturing industry