Shandong Microwave Machinery Co.,Ltd.
  • AddressNo. 225, Huangqiao Village, Beiyuan, Tianqiao District, Jinan, Shandong, China
  • Factory AddressNo. 225, Huangqiao Village, Beiyuan, Tianqiao District, Jinan, Shandong, China
  • Phone(Working Time)+86 0531 85064681
  • Phone(Nonworking Time)0086-15020017267
  • Fax+ 86 0531 85064682

Microwave Roasting Equipment

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Microwave Roasting Equipment

Application
Microwave Roasting Equipment are widely used in the peanut, sesame seeds,
wheat, melon seeds, sunflower seeds, peanuts, corn, soybeans, walnuts, almonds, chestnuts, pistachios,
cashews, filbert and dried fruit etc; and for leisure food, pachyrhizus chips, potato chips, dried
shrimps, fish maw and so on. Compared with the traditional production methods, microwave baked
foods are crispy and delicious, products particle puffed full, natural color, beautiful appearance, and
has insecticidal sterilization effect.

Characteristic of microwave roasting machine
1. Energy conversion efficiency high, fast heating.
Microwave oven itself, but microwave energy fever, make the material through materials within polarity produced molecular friction between internal heat. Make the liquid inside processed materials instantaneous warming vaporization, boosting inflation; And depend on gas expansion force make component of macromolecule substance, and become a structural degeneration areolar tissue structure characteristics, finalize the design of microporous shape more than substance.
2. when microwave baking ,sterilization effect at the same time.
Microwave sterilization is in the microwave heating and the dual role of non-thermal effect under the temperature sterilization, compared with conventional in lower temperature and very short time get satisfactory antiseptic effect. General sterilizing temperature around in 80 °C, the processing time in 3 ~ 5 minutes, and to the maximum maintain its nutrients.
3.The operation is convenient.
Microwave power and conveyor belt speed can adjust arbitrary
, both thermal inertia, but do not exist, simple, easy to open namely stop control. Improve the production environment. Microwave equipment nirvikalpa radiation, no dust, no noise, no pollution, easy to realize the food hygiene inspection standard.
4. Puffed effect is obvious.
Microwave fast heating effect, make the material internal water molecules, achieve rapid vaporization ,reach to the puffed purpose.
5. Low temperature sterilization, nutrition loss less.
Microwave sterilization is in the microwave heating and the dual role of non-thermal effect under the temperature sterilization, compared with conventional in lower temperature and very short time get satisfactory antiseptic effect. General sterilizing temperature around in 80 °C, the processing time in 3 ~ 5 minutes, and to the maximum maintain its nutrients. The reserves of vitamin C conventional heat treatment fruits and vegetables is 46% ~ 50%, microwave, can reach 60 ~ 90; Keep to vitamin A conventional heat treatment is 58 percent, and microwave treatment is to 84%, and would not affect the original flavor, is the fruit and vegetable food processing, obtain the good means green food.

A qualified industrial production equipment, the long-term continuous operation is the minimum requirement. At the worst time, it will stop for one or two hours to let the equipment rest, otherwise the machine will automatically protect and stop working.
Several characteristics of microwave drying wood:
1) Fast speed: Microwave drying is extremely fast due to its unique advantages. From the actual situation of dry wood, the results show that when the microwave power is about 60 kW, from 8 mm thick thin wood board to 50 mm thick square material without causing drying defects, the water content is 35~40. % drying to about 20%, drying time is only 10 minutes to 26 minutes. If the microwave power is increased, a corresponding reasonable process must be adopted. Otherwise, although the drying speed is accelerated, the internal temperature of the wood rises sharply, the water vaporizes, and the air pressure increases sharply, exceeding the allowable extent of the wood fiber, causing cracking. Therefore, microwave drying of wood has a limited increase in output power density.
2) High efficiency: use the "water-lifting rate" indicator to assess the drying efficiency. The so-called "water-lifting rate" is defined as the kilowatt-hour of microwave power in 1 hour, and the kilograms per kilowatt-hour (kg/kwh). The high water extraction rate indicates that the equipment is highly efficient. The materials for the four types of tree species were tested under the same conditions. The results showed that the water extraction rate of all kinds of tree species was about 1kg/kwh or slightly exceeded. When the same type of wood has different thickness specifications, the water extraction rate is also approximately equal to 1 kg/kwh. The length of the same kind of wood along the fiber direction is different, the drying effect has obvious difference. Compared with the eucalyptus with relatively tight fiber structure, the short water extraction rate is high, and vice versa. It is well known that the heated wood undergoes a further cooling process as the gradual cooling process progresses. Therefore, proper drying after drying can improve the drying effect.
3) Good quality: The shape and crack of the wood during the conventional drying process are caused by the uneven fiber shrinkage after the wood loses water. In natural drying, on the one hand, since the evaporation speed of the surface of the wood is much larger than the diffusion degree of the internal moisture, the surface is wet inside the surface, and the drying of the surface causes the fiber to shrink, resulting in stress between the surface and the inside. On the one hand, the fiber pores of the wood at both ends in the fiber direction are much larger than other parts, so the shrinkage of the fiber greatly exceeds the rest, so in fact, the two ends of the wood are almost free from cracking and deformation in the natural drying, and the length of the crack is generally In the range of 10 to 30 cm, a severe crack or a few pieces of broken boards. At the same time, the wood is pushed on the drying field, and it is repeatedly eroded and deteriorated by the long-time wind, sun and rain, causing many wood molds. This deformation, cracking, mildew and deterioration have seriously affected the quality of the wood and caused a lot of scrapping. The drying is even and thorough, the product quality is improved, and the utilization rate of wood can be increased by about 5%. Such as the surface will not be knotted, improve the toughness, will not crack, deformation, discoloration, correction of bending, etc.;
4. When the microwave power density is too large, the internal pressure of the wood vaporization exceeds the allowable limit of the wood fiber, and the internal cracking of the wood may also occur. This is the principle that microwave drying of wood still requires a certain amount of time.
a) Saving wood: Wood is a kind of material in the country. Saving wood not only has economic benefits, but also can reduce forest harvesting and has significant environmental benefits. In natural drying, wood scrapping due to deformation, cracking, and mildew deterioration is quite serious. It has been proved that the microwave utilization can increase the utilization rate of wood by at least 5%, which accelerates the period of wood use: it takes a long time for the wood to dry naturally. In a year or even a few years, in order to maintain normal production, it is necessary to store a large amount of wood for turnover, not only occupying a large space but also frequently turning over the sun. After drying by microwave, the wet wood is dried in time, and the above phenomenon can be appropriately improved.
b) Killing wood mites: Most of the wood mites are buried in the wood. When they become adult worms, they will destroy the appearance and use value of the furniture. During the microwave process, the internal eggs and larvae are also killed. . According to the test, under the action of microwave energy of 2450MHz, if the temperature of the wood is 70-80 degrees, it takes only 3 minutes to completely kill the eggs and larvae.
In the microwave drying process, the situation is completely different. Because microwave drying has the advantages of strong permeability and selectivity, during the drying process, the shrinkage between the ends of the board and the ends and the intermediate fibers are basically the same, so Cracking and deformation are small. After actual investigation, it is agreed that the quality of microwave dried wood is better than natural drying.

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