In the production of brown pillow, drying setting is an important process, and whether the drying process is advanced or not is related to the quality and energy consumption of the product. At present, the commonly used drying method is hot air circulation drying, that is, steam is used to heat the air into hot air, hot air is exchanged with wet brown fiber in drying room, and the moisture in brown fiber is taken away by hot air, so as to complete the drying process. The energy utilization efficiency of this drying method is low, the drying is uneven, and even the internal structure difference of brown fiber will be enlarged, resulting in voids, which seriously affects the quality of the product. The microwave brown pillow dryer produced by Leader microwave equipment company effectively solves these problems.
Introduction of Microwave Brown Pillow Shaping and Drying Machine
Brown Pillow
Advantages of microwave-brown pillow setting and drying machine:
1.The drying time of microwave brown pillow setting drying equipment is short.
The necessary condition for the smooth drying is that the partial pressure of water in the air flow is lower than the partial pressure of moisture on the surface of wet brown fiber. The greater the pressure difference between the two, the faster the drying is carried out. Therefore, the dry air should take away the vaporized water in time in order to maintain a certain mass transfer driving force.
In hot air circulation drying, the moisture on the surface of brown fiber is vaporized first, and the moisture content inside brown fiber is different from that on the surface, so the moisture in brown fiber diffuses and vaporizes to the surface in the form of liquid or gas. Due to the vaporization of moisture on the surface of brown fiber, the pores on the surface of brown fiber shrink, forming the skin core structure, which hinders the diffusion of moisture to the surface of brown fiber and the decrease of drying rate.
Microwave brown pillow setting drying machine drying is different. Microwave drying is the bulk heating caused by dielectric loss of brown fiber in electromagnetic field. in the drying process, the moisture content in wet brown fiber is often higher than that on the surface, which leads to the absorption of microwave energy and conversion into heat energy in brown fiber, so the temperature inside brown fiber is higher than that on the surface. At the same time, the steam is produced rapidly because of the heat generated in the brown fiber, and the pressure gradient is formed. The temperature gradient and pressure gradient of wet brown fiber are consistent with the diffusion direction of water, which greatly improves the migration conditions of water in the drying process, thus increasing the diffusion rate of moisture and speeding up the drying rate.
2.Microwave brown pillow setting drying machine has great influence on the shrinkage of brown fiber.
Compared with hot air cycle drying, the shrinkage of brown fiber by brown pillow microwave setting dryer is twice as large as that by hot air circulation drying. The increase of shrinkage is characterized by cavity in brown fiber, elimination of cracks and decrease of inhomogeneity, and obvious increase of fiber size of brown fiber. At the same time, the higher the shrinkage of brown fiber, the better the extension and wear resistance of brown fiber, which greatly improves the densification degree and dimensional stability of brown fiber.
3.Microwave drying brown pillow machine has the function of sterilization and insect control.
Under the action of microwave field of microwave brown sleeper-type dryer, insects and bacteria in brown fiber can absorb microwave heat up due to molecular polarization, so as to cause protein denaturation and loss of biological activity.
Under the action of electromagnetic wave of microwave setting brown pillow equipment, in addition to the heating phenomenon produced in organisms, it will also cause electroporation, cell membrane rupture and magnetic field coupling, which will eventually lead to strong biological response, resulting in variation of protein and physiological active substances in microorganisms, and loss of activity or death. Microwave brown pillow setting dryer can effectively solve the problem of mildew and parasite of brown pillow.
Microwave Brown Pillow Shaping and Drying Machine
Principle of microwave brown pillow setting dryer:
Microwave drying is a new drying technology. Microwave is a penetrating electromagnetic wave with a wavelength range of 0.001 ~ 1 m and a frequency range of 300 ~3 × 105 MHz.Different kinds of brown fiber are different in the reflection, transmission and absorption capacity of the microwave, and the water has strong microwave absorbing capacity. The energy released by the electromagnetic field is mostly absorbed by the water in the brown fiber, and therefore, the microwave heating is commonly used in the drying process.
Equipment schematic diagram
The microwave drying technology has the advantages of good drying quality and high efficiency, overcomes the defects of hot air circulation and drying, provides a possibility for realizing the rapid and efficient drying of the brown pillow, and is a novel dry new technology with great development potential. Microwave technology has developed rapidly. It has been applied in many fields such as light industry, brown fiber and chemical industry. Microwave boric acid drying equipment is also convenient for us
ntroduction of Microwave Brown Pillow Shaping and Drying Machine
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