In the chemical industry, some raw materials, finished products and semi-finished products often contain more or less water, and in order to facilitate the processing, transportation, storage and proper use, the water in the material is often removed. Drying is the most widely used method in chemical production to remove moisture from solid and slurry materials. Microwave chemical raw material drying equipment is an advanced professional equipment.
The advantages of the microwave chemical raw material drying equipment produced by the Leader Microwave Equipment Company:
1.The microwave chemical raw material drying machine can improve the efficiency and shorten the drying time. The penetration of the microwave can cause the internal molecules of the raw materials to stir vigorously, and quickly raise the temperature so as to rapidly dry the materials.
2.Microwave chemical raw material drying machine can improve product quality. There is no change in the shape and crystal structure of the dried materials in the microwave chemical raw material drying production line.
3.Some chemical raw materials are easy to decompose, while others are flammable and explosive. The traditional drying process has a high temperature and is prone to accidents. When some materials are dried, the dust is too large, there is a risk of poisoning and explosion, and the materials are easy to block.
4.Corrosion prevention of equipment. When drying chemical products, corrosive gases often escape, which will corrode drying equipment. Microwave drying equipment for chemical raw materials is made of special materials, which has strong corrosion resistance, long service life of equipment and saving equipment maintenance cost.
5.The microwave drying machine for chemical raw materials is heated evenly. Because heating is produced directly in the medium, uniform heating can be achieved. This is of great significance for some substances which are easy to cause surface hardening or even decompose and deteriorate by conventional heating process.
6.Microwave chemical raw material drying equipment automatically adjusts the temperature. In the process of volatile water, the absorption of microwave energy by heated substances varies with the decrease of moisture or other media. When the moisture decreases, so does the heat, so there is no excessive dryness. This is beneficial to some organic products and substances that are easily sensitive to heat.
7.And the heat consumption of the microwave chemical raw material drying equipment is low. The loss of heat in the atmosphere is extremely low due to the direct result from the interior of the dryer. The test shows that the drying efficiency of the microwave chemical raw material drying equipment is relatively high.
8.The microwave chemical raw material drying equipment is sensitive to reaction. In the conventional heating method, such as electric heating, steam, coal gas and so on, the heated object reaches a certain temperature, and a long period of time is required. For example, a high-speed iron sulfate is dried and dried in a steam oven for 2-3 hours to see no reaction. But when the microwave is dried, a violent reaction takes place immediately.
Microwave heating and drying principle:
In the process of microwave drying, all the moisture in the material, that is, the inner layer and the surface water, are selectively heated by microwave at the same time, and vaporization occurs instantly after the moisture is heated, while the inner layer of the material produces a huge pressure difference with the surface gas film and air, forming a huge driving force, which makes the moisture transfer quickly from the inside of the material to the air.
The temperature gradient and the heat transfer direction inside the material in the drying process of the microwave chemical raw material drying equipment are the same as that of the water vapor transfer direction during the drying process of the microwave chemical raw material drying equipment, and therefore, the microwave chemical raw material drying equipment is characterized by being heated by the inner and the outer surfaces. The material to be dried is placed in a microwave field, and the absorption heat energy and the dehydration process are not completely determined by the drying medium and the thermal conductivity of the drying medium, so the thermal resistance is negligible. Because the dielectric loss factor of water is much larger than that of general materials, microwave can selectively heat water, rather than heating the whole material, so microwave radiation has unique advantages in the process of drying.
There are many kinds of chemical raw materials, which can be divided into organic chemical raw materials and inorganic chemical raw materials. There are as many as 5 to 7 million kinds of chemicals in the world, more than 100000 kinds of chemicals have been sold and circulated on the market, and more than 1000 new chemicals have come out every year. Microwave chemical raw material drying equipment has a broad application prospect.