Effect of microwave dryer on mineral powder
The dry powder mixer is also called dry powder mixer. When mixing, the materials in the mixer are affected by two rotors in opposite directions. The blade with animal material rotates counterclockwise along the inner wall of the slot. On the one hand, it turns left and right with animal material. In this area, no matter the shape, size, and density of the material, the two rotors overlap, It can make the material float up in the instant weightlessness state, which makes the material form a full range of continuous circulation in the trough, and shear each other, so as to achieve the effect of rapid, soft and even mixing.
the dry powder mixer is a vertical mixer, which can work alone, and it can work together with the conveyor, storage tank, electronic metering automatic packaging machine (applicable to the valve pocket, saving 3-4 workers, It is a new proct of traditional proction technology.
the dry powder mixer is made up of a variety of dry powder and fine granular materials (such as putty powder, plaster, dry powder mortar, color cement, various mineral powder, chemical materials, etc.) Dry powder mixer is a new type of high-efficiency mixing equipment, which is widely used in putty paste, stone paint, dry powder, putty, medicine, food, chemicals, feed, ceramics, refractories, etc., i.e. the mixing of powder, i.e. powder and mortar, chemical instry, compound fertilizer, dye, pigment, rubber, building materials, refractories, rare earth, plastic glass and new materials Solid solid (i.e. powder and powder) and solid slurry (i.e. powder and slurry) mixing in nuclear energy materials and other instries
Zhengzhou Tongding mechanical equipment Co., Ltd. is a joint-stock enterprise integrating proction and sales. The company is headquartered in Zhengzhou Mechanical processing Instrial Park, covering an area of nearly 27000 square meters and a construction area of 18000 square meters. Its annual domestic sales exceeded 150 million yuan, and its export earnings reached 6.8 million US dollars. Since the company was founded in 1985, adhering to the scientific management method of modern enterprises, precision manufacturing, continuous innovation, rapid development and growth, has become a bright pearl of China's machinery manufacturing instry
the main procts of Tongding machinery include sand dryer, river sand dryer, yellow sand dryer, quartz sand dryer, three return dryer, graphite dryer, putty powder mixer, coating mixer, dry powder mortar mixer, mortar King mixer, stone paint mixer, glass bead mixer, dry powder mortar proction line, etc More than a dozen kinds of mechanical equipment are widely used in mining, chemical, metallurgy, building materials, coal, refractory and other instries. The company regards proct quality as the life of the enterprise. The procts have passed the IS09001:2000 international quality system certification. The main parts and wearing parts are made of high-quality wear-resistant materials and advanced processing technology, which make the equipment wear-resistant. They are well known at home and abroad and are exported to Russia, Kazakhstan, Turkey, South Africa, Egypt, Vietnam, India, Australia, North Korea, Canada, EU and other countries and regions
microwave is a kind of electromagnetic wave with very short wavelength, the wavelength is between 1 mm and 1 m, and its corresponding frequency is between 300 GHz and 300 MHz. In order to prevent the interference of microwave to radio communication, broadcasting and radar, there are four frequencies for microwave heating and drying, which are L-band, 890-940mhz and 330mm in central wavelength; S segment, frequency 2400-2500mhz, central wavelength 122mm; In Section C, the frequency is 5725-5875mhz, and the center wavelength is 52mm; The frequency is 22000-22250mhz, and the center wavelength is 8mm. Only L-section and S-section are used in household microwave oven
microwave is obtained by applying direct current or 50 Hz alternating current to the electric vacuum device or semiconctor device, and using the special movement of electrons in the magnetic field. This kind of motion can be simply explained as follows: from the perspective of electrical structure, one kind of molecule is called non-polar molecular dielectric, and the other kind is called polar molecular dielectric. In general, they are arranged irregularly. If they are placed in an alternating electric field, the orientation of polar molecules of these media also changes with the polarity of the electric field, which is called polarization. The stronger the applied electric field is, the stronger the polarization is. The faster the polarity of the applied electric field changes, the faster the polarization is. The more intense the thermal motion of molecules and the friction between adjacent molecules. In this process, the conversion from electromagnetic energy to heat energy is completed. When the heated material is placed in the microwave field, its polar molecules oscillate and rub back and forth with the microwave frequency at billions of times per second, and the heat generated is enough to make the material hot dry in a very short time< The advantages of microwave drying equipment are as follows:
1< It is easy to control and operate. Automatic control of heating time and drying temperature
3. Save time
4. Low energy consumption
5. Low proction intensity and less land occupation
6. Save labor and process, especially easy to connect with the front and back processes to form an automatic line, recing the number of handling times
7. Environmental protection, clean and sanitary, no pollution, and no "three wastes" problem
equipment technical parameters
model cs-20sd
frequency (MSD) 2450 ± 50
microwave output power (kw) 12
input voltage (V) 380
equipment size (L * w * h, mm) 1500x1500x2000
equipment weight (T) 1.8
chamber material instrial grade stainless steel
microwave leakage limit (MW / C m2) ≤ 1
cabinet temperature (℃) 45
ambient temperature (℃) seasonal normal temperature
relative humidity (%) 85
1. Because of the unique advantages of microwave, the drying speed of microwave drying is extremely fast. If the microwave power is increased, the drying speed will be faster, but the corresponding reasonable process must be adopted. Otherwise, the drying speed will be accelerated, but because of the rapid rise of wood internal temperature, water vaporization and air pressure, it will exceed the allowable degree of wood fiber and cause cracking. Therefore, when using wood microwave dryer to dry wood, the increase of its output power density is limited and cannot be increased at will. When the microwave power density is too high, the internal thermal stress of wood will exceed the allowable limit of wood fiber, and the phenomenon of internal cracking will also appear. This is the principle that microwave drying wood still needs a certain action time
2. The efficiency of wood drying by microwave dryer is high. With the graal cooling process, the moisture in the wood heated by microwave needs to be further evaporated. Therefore, proper heating, drying and cooling can improve the drying effect
3. Due to the strong permeability and selectivity of microwave drying, ring the drying process, the shrinkage of the fibers between the surface and inside, at both ends and in the middle of the board is basically the same, so the cracking and deformation are small. Therefore, the quality of wood drying by microwave dryer is good
high frequency vacuum wood dryer
1. High frequency heating is used to solve the problem of fast heating and fast drying of wood
2. The wood is heated inside and outside at the same time, with uniform heating and good quality, which can maintain the natural color of wood
thirdly, vacuum water absorption can rece the temperature of wood drying process, make the wood vaporize at low temperature, not easy to crack, and improve the dehydration speed of wood
Fourth, high efficiency and environmental protection< 5. High frequency wave can kill the insects and pathogens hidden in the board, shorten the drying cycle and further ensure the quality of wood drying
it is especially suitable for the drying of thick, hard and large section square wood (it takes a long time to use the conventional drying method), such as red sandalwood, chicken wing wood, yellow pear, mahogany, etc. At the same time, it also uses the second drying of small batch and accelerated wood after returning to moisture.
for glass, plastic and porcelain, microwave almost passes through but is not absorbed
for water and food, it will absorb microwave and heat itself. For metal things, microwave will be reflected
this depends on the type, power, drying quantity and specific requirements of microwave drying equipment. You can ask felite of Zhengzhou!