Microwave Drying Machine

Microwave Drying Machine Introdução detalhada

Microwave Drying Machine is a modern high-tech dry equipment that has changed the traditional heating and drying process to new ideas. Microwave does not need to preheat, instead, heat transfer, directly to the material from the inside to the outside of the simultaneous heating, heating uniformity, not easy to deformation, and microwave drying after the material resistance to pressure is stronger. Due to the unstable temperature change of traditional hot air, its instability in heat transfer sometimes is high and sometimes low. The need for heat conduction from the outside to the inside, uneven heating, resulting in different angles of coking and external coking endogenous and other phenomena.

Loyal microwave dryer machine adopts targeted settings according to the specific needs of the material to set the machine's transmission speed, microwave power, and other technical parameters.

And Loyal Microwave Drying Machine is continuous intelligent microwave drying equipment that can be seamlessly connected with upstream and downstream processes; the equipment transmission can be divided into conveyor belt type, chain plate type, chain type, and so on.

It is mainly used for heating, drying, sterilizing, and puffing various materials, with features in environmental protection, energy-saving, and high efficiency.

Conventional thermal sterilization is through heat conduction, convection or radiation, and other heat transfer from the food surface to the internal, often requiring a long time to reach the internal sterilization temperature. 
Microwave sterilization equipment uses microwave penetrating radiation effect, the combined effect of thermal and non-thermal effects so that the items inside and outside the uniform, rapid warming to kill bacteria. 
In the vigorous power density intensity, the processing time is significantly reduced, even as long as a few seconds ~ tens of seconds that is to achieve satisfactory results.

Features of Microwave Drying equipment:

1.Shorter time, faster speed, utilizing the same material：as other drying sterilization equipment to save at least 50% of the time
2.Low-temperature sterilization, maintaining its nutritional composition: compared to conventional thermal sterilization in a relatively low temperature, a shorter period of time to obtain the effect of sterilization and insecticide, the general sterilization temperature of 75 ~ 80 ℃, the processing time of 3 ~ 5 minutes. Microwave food sterilization machine unique processing method can retain more of the active ingredients. Therefore, to maximally maintain the original color, aroma, taste, shape, and other flavors
3.Environmentally friendly, energy saving: microwave drying sterilization machine does not require fuel, no boiler, no pollution, no heat radiation. Optimize Not only the working environment but also reduce carbon emissions.
4.Drying and sterilization at the same time: one machine to solve two processes, saving space and costs

Components of the Industrial Grade Microwave Drying equipment 

The structure of microwave Drying equipment can be divided into.
① Main frame part → ② Transmission part → ③ Microwave generator part → ④ Microwave heating chamber part → ⑤ Anti-microwave leakage part → ⑥ Main control part

1、The mainframe part of the microwave dryer includes the machine base, frame, bracket, etc. The stand of machine base adopts angle iron, and the material of bridge body and mood is 2mm thick cold-rolled plate spraying, only the part of the heating box is made of stainless steel plate, and the rest of the microwave Drying machine is made of cold-rolled plate spraying. The whole equipment is neatly designed as well as being super practical, and the bottom of the whole machine adopts the ground screw, which can adjust the height of the entire device (±15㎜).

2、The transmission part of the microwave tunnel dryer includes an electric motor, reducer, chain sprocket, drum, carrier roller, tightening adjusting roller, conveyor belt, and other components. The speed of transmission is adjustable through the control of the speed table; the mesh plastic chain belt with stopper on both sides is adopted; the deflection is adjusted manually, and the operation is reliable. The chain wheel chain is placed on the outside of the machine seat to prevent dust and materials from falling in.

3,The microwave unit part of the microwave drying equipment : mainly by the microwave generator magnetron, industrial microwave transformer, high-voltage capacitor, high-voltage silicon stack, cooling fan, detection circuit, and excitation cavity waveguide composition; equipment machine all use high-quality components: the whole machine configuration 78 Japanese Panasonic magnetron [model 2M167B] (900W), microwave High conversion efficiency, strong load resistance, long life (using air-cooled heat dissipation protection);

4, Microwave drying machine microwave cabinet part: including microwave heating cabinet and power supply cabinet. Microwave heating box body using 304 # 1.5mm stainless steel plate to make microwave heating box body, a total of 8 heating box. There is a flush with the bottom of the box observation door, convenient to clean the box inside the health and observation of material heating, with automatic power-off protection device, and can prevent microwave leakage. The bottom of the box is flushed with air inlet holes, and the heating box can be washed with water.

5, According to the material heating characteristics in every two sections of the heating box body between the addition of a transition section (a total of three branches of the transition section), the transition section of the top of the box body installed an axial fan to quickly exclude the box material heat, to prevent the material from heating up too fast. Add 1 meter long forced air-cooled cooling section at the discharge end to facilitate rapid cooling of materials.

6, The anti-microwave leakage part of the Microwave Drying equipment : in the kit in and out of the material end designed to prevent microwave leakage suppressor, to ensure that microwave leakage is in line with the national GB10436-89 microwave radiation safety standards (<5 mW /㎝2), to ensure the safety of personnel.

7、The cooling part of microwave Drying equipment: In the microwave heating box and power supply box, there are humidity and heat exhaust hoods and flanges, and the double air ducts of humidity and heat exhaust are not only beneficial to the material's humidity exhaust but also beneficial to the heat exhaust of the electrical part, which ensures the safety and reliability of the equipment.

8、Equipped with a simple feeding hopper and discharging hopper.

Application of microwave sterilization and microwave drying technology：
Due to the many advantages of microwave sterilization and drying equipment, many manufacturers have given up the old drying sterilization machine and presently turn to the new model of microwave sterilization and drying equipment, which also contributed to the rapid development of microwave drying technology.
So far, microwave sterilization and drying technology have been fully satisfied with more than 95% of the production and drying needs while meeting the fruit, vegetables, herbs, chemical raw materials, and other production and processing needs.

Microwave Drying Machine: A Complete Guide to Buying:

1.What Is Microwave Drying?

Microwave drying is a drying method using electromagnetic waves as the heating source and the dried material itself as the heat generator.

Microwave drying is different from the traditional drying method because the direction of heat conduction is the same as the direction of moisture diffusion, which has the advantages of large drying rate, energy saving, high production efficiency, uniform drying, clean production, easy to realize automatic control and improve product quality, etc. Therefore, it is getting more and more attention in various fields of drying.

2.Which Drying Uses Microwave? 

Microwave drying equipment is also called microwave drying equipment, microwave drying sterilization equipment, is now widely used in the food industry, materials chemical industry, pharmaceutical industry, mineral extraction industry, ceramics industry, laboratory analysis, wet natural rubber processing and other aspects.

3.What are the Advantages of Microwave Drying?

1, uniform and thorough: high water content of the part, absorb more microwave, generate more heat, and vice versa, the less; at the same time, the product is heated inside and outside the whole, no thermal inertia, no heat transfer loss, fast drying speed. The microwave directly penetrates the product, radicalizes the water molecules, generates heat, the internal temperature is also slightly higher than the external temperature, can try to avoid the temperature gradient and produce "shell" and slow evaporation of moisture shortcomings.
2, simple control: because the microwave power can be quickly adjusted and no inertia characteristics, combined with PLC automatic control system in a timely manner, easy to adjust the process parameters and determine.
3、Improve the quality: dry in a low temperature oxygen-free environment, to better ensure the quality of the product.
4、Keep the original colour: Due to the short drying time of microwave, it solves the problem of long traditional drying time and high humidity which easily lead to the change of colour of the products, especially for precious herbs, Chinese medicine extracts, seafood products, etc. It is an ideal drying method.
5, energy saving and environmental protection: compared with conventional electric heating and drying methods, microwave drying can generally save points 50%, the equipment uses microwave radiation energy transfer, is the overall heating of the medium. No other heat transfer medium is required. Avoid the disadvantages of slow heat transfer under vacuum conditions, so the speed is fast, high efficiency, drying cycle is greatly shortened, energy consumption is reduced. There is no noise, no toxic gas or liquid emissions, and it is an environmentally friendly drying technology.

4. Which Drying Method is the Best?

The common drying methods include natural drying, boiling, drying, spray drying, freeze drying, etc. With the development and supply of the social level, some new drying technology and equipment are slowly developed and researched, microwave drying technology is the best drying method nowadays.

Traditional drying technology has more or less disadvantages and shortcomings, microwave drying technology from the theoretical point of view, can solve all the drying requirements, its emergence has solved many drying problems, such as small moisture drying, viscous material drying, embryo, making pieces of drying, filter cake drying, uniform drying, deep drying, fast drying, energy-saving drying and a series of high requirements of drying.

5. Why is Microwave Drying So Efficient?

Microwave drying and sterilisation equipment is the result of the combined effect of the thermal and biological effects of the electromagnetic field.

Microwave has the ability to penetrate and heat the medium inside and outside at the same time, without the need for heat conduction, so the heating speed is very fast, for moisture content of less than 30% of the food, the drying speed can be reduced by hundreds of times.

6. How does Moisture Content Affect Microwave Heating?

Generally speaking, the amount of moisture content in food affects the heating effect of the microwave oven. Food with a high moisture content will heat up faster.

Microwaves are actually just a mechanism for converting electrical energy into shortwave energy. It selectively targets the water molecules in the food, causing them to vibrate and release heat quickly.

7. How Microwave Drying Machine Works

The microwave drying machine works by first generating microwaves from a microwave generator and then sending the material through a conveyor system to a heater where the water in the material is heated up and evaporated by the microwave energy and the water vapour is removed through a dehumidification system to achieve drying.

The bacteria in the material are killed by the biological and thermal effects of the microwave electromagnetic field. As the microwave is directly on the material, so the drying temperature is low, fast and the loss of the active ingredients in the drug is very small.

8. Can you microwave powder?

If you want a microwave powder, make sure that the substance is not electrically conductive, that it is insulating, and that it does not burn or evaporate when heated, as this can be dangerous.

9. How much Microwave Drying Machine Cost 

The price of our microwave dryers fluctuates greatly due to the power of the equipment and the degree of automation. We can provide different types of microwave drying equipment for our customers, such as 100kw, 200kw, fully automatic and semi-automatic, so the price of the equipment can be $2000 or $1000.
It is worth mentioning that our prices are very competitive in the industry, although we are not the lowest price in the market, but the quality of microwave drying equipment in the same price, we must be the highest, if you have special needs, you can also contact us, we will provide you with customized services.

10. How to dry wood in a microwave

The main principle of drying wood in a microwave is that by increasing the temperature of the wood, the moisture in the wood evaporates and moves outwards in the air at a certain flow rate, causing the moisture to leave the wood quickly.
Microwave drying equipment allows the wood to be placed in a microwave electromagnetic field, where the electromagnetic losses caused by the interaction between the microwaves and the moisture in the wood are converted into heat energy to heat the wood.

During the drying process, the moisture content of the wood has the characteristic of being high inside and low outside, so its absorption of microwave energy gradually decreases from the inside to the outside, thus making the wood have the same temperature gradient and moisture content gradient inside. When microwave drying, as long as the wood is in the microwave penetration range, the wood is heated inside and outside at the same time, so that a fast and uniform drying effect can be achieved.

11. Microwave Drying Machine Process

Microwave drying equipment mainly uses microwave technology to dry a variety of materials, microwave is a very strong penetrating wave, can be directly on the inside of the material, the internal and external heating at the same time, the material can achieve rapid and uniform drying. The maximum temperature of microwave drying equipment can reach 200°C, while the drying time can be effectively reduced from the previous unit of "days" to "hours", the specific drying temperature and drying time depends on the type of material to be dried. The exact drying temperature and time depends on the type of material to be dried.

12. How to Troubleshoot Microwave Drying Machine

1. Raw materials on fire: raw materials cannot be sucked away, resulting in the dryer catching fire, the main reason may be that the microwave drying equipment power is too small, unable to achieve the drying effect, forced to heat, resulting in raw materials on fire.
2. Materials can not be thoroughly dried at one time: microwave dryer is too small, too much material material in the microwave dryer, or because the operator of the microwave drying equipment operator error, incorrect use of microwave dryer and lead to.
3. Uneven drying of materials: may be due to improper use of microwave drying equipment or material caking under the influence of low temperature. For the former, the operator's skills training must be strengthened so that they can master the operating skills. For the latter, the material should be crushed before drying.

13. Limitation of Microwave Drying Machine

1. High cost: Generally speaking, the investment cost of microwave drying equipment is relatively large, for some large materials is obviously not cost-effective, can not achieve a large number of drying.
2. Uneven heating: In the drying process, the mutual interference between microwaves and the reflective effect of the inner wall of the drying equipment cavity makes the energy density distribution in the electromagnetic field space different, resulting in uneven heating of the material, easy to damage the material material structure. In the later stages of drying, the material will also be carbonised due to local overheating.

14. What is loss on drying?

In the process of drying materials using microwave drying equipment, the water in the material will be evaporated and the weight of the material will be reduced, so the drying loss refers to the weight loss, caused by the water and any kind of volatile substances that can be volatile under certain conditions, which is inevitable in the drying process. 

It is worth noting that microwave drying equipment can be customised in terms of drying time and temperature to achieve the desired end product, while retaining most of the nutrients in the raw material, without destroying the nutritional content of the raw material.

15. Supporting equipment to buy with microwave drying equipment

Microwave drying equipment is a very high use rate of equipment, especially in the food processing industry is very widely used, can provide manufacturers with very high drying efficiency and drying quality, dried materials rich in nutrients, high quality. 

Today's microwave drying equipment has been fully automated production method, if manufacturers want to further improve the production process, you can use the feeder, conveyor, cooler and packaging machine and other equipment to further improve the drying quality of materials.

16. How to Dry Leaves in Microwave?

Place the leaves to be dried on a tray and place them in the microwave oven for about 30 seconds on a medium heat. Be careful not to dry the leaves for too long at one time or at too high a temperature, as this may cause the leaves to lose too much moisture and catch fire.

Microwave Drying Machine Customer Reviews

Tabassum Bhatti from Pakistan - 2022-1-2
This year, I created my brand of dehydrated fruit, and a friend suggested I dry fruit in the microwave, so I found it loyal, thanks to apple's careful introduction and the beautiful food drying equipment video.
Now my business is booming, and I plan to buy another loyal industrial microwave dryer for my business in 2023.

Hazem Shoukry from Egypt - 2021-12-6
Loyal's powder drying equipment helped me a lot. I have been unable to dry the spices well, which caused my production progress to be plodding. This problem has been well solved since I purchased loyal's microwave drying machine.

Adel CHIBA from Bahrain 2021-12-1
This is the second time I bought their industrial microwave dryer, the last time was drying fruit in microwave, very good, this time is drying herbs in microwave