20kw Microwave Green Tea Drying Machine Flower Tea Sterilizing CE Certificed

Microwave tea leaf killing machine is a new type of tea leaf killing machine equipment, which overcomes the influence of drum killing machine on the appearance of tea leaves and can achieve the effect of no scorched edge and bursting point, especially the color of the killed leaves is incomparable to the ordinary drum killing machine.

1. Microwave tea killing machine features advantages summary Microwave in the application of tea killing.
Production of green tea, oolong tea, are required to heat the greening process to blunt the activity of polyphenol oxidase, evaporate part of the water, evaporate the smell of green grass, soften the tissue. At present, the production of commonly used frying method
The test results show that the tea processed by microwave and frying method is of good quality, and the time of microwave killing is short (1/8 of the frying time) can be carried out continuously. And steam killing due to the high moisture content of steam, the outer layer of raw materials affected by high temperature, so the tea leaves after killing is not conducive to dehydration, part of the chlorophyll is destroyed, the nutrients contained in raw materials with condensation and partial loss of color is relatively large impact.
The main application of microwave in tea greening is the thermal effect it produces. When the magnetron generates microwaves and shines to the tea pairs, the polar molecules inside the tea leaves are affected by the periodic changes of microwaves and carry out periodic activities with the microwaves. Due to the high frequency of microwaves, the molecules inside the tea leaves collide at high speed and generate a large amount of friction heat to rapidly increase the temperature of the material, thus achieving the effect of **warming.

2. Microwave drying in tea applications in the general hot air drying process in the material external heating, surface drying, heat transfer inward, its direction and the direction of diffusion of water transfer in the opposite direction, affecting the outward evaporation of water. And microwave is internal heating, high moisture content of the parts of the temperature rise faster. Therefore, in the microwave drying process, the migration of moisture from the inner layer to the outer layer is fast, and the drying speed is obviously faster than hot air drying. The application of microwave drying in tea drying has the following advantages: (1) fast drying speed; (2) good product quality; as the surface temperature of tea is not too high, chlorophyll changes less, green color and resistant to storage, less aroma loss, uniform drying; at the same time, due to the rapid evaporation of water, easy to form porous, good rehydration of the product, easy to dissolve the contents of the tea when soaking.

3. Microwave in tea insecticide and mold applications tea in the storage and transportation process is prone to insects, insect contamination often occurs in the process of black tea stacking. Insecticide method of drug fumigation is commonly used in the past, but there is the problem of drug residues. The use of microwave treatment can ** good insecticidal effect, insecticide effect of insects in tea and tea and insects are closely related to the dielectric properties of the body, when the water content of tea is less than 12%, is conducive to enhancing the effect of insecticide. Tea in processing and storage * easy to moisture and mold and reduce the quality. Through the test proved that microwave technology has excellent killing effect on tea mold.

4. microwave in the application of tea juice extraction tea soft drinks (plus tea drinks, tea punch) processing can not be separated from the extraction process. At present, the conventional method of tea extraction is to use hot water extraction, microwave extraction technology is developing rapidly in foreign countries, to 1995, foreign companies have been authorized to two Chinese companies to develop industrial-scale microwave extraction technology applications. Extraction of active ingredients in tea by microwave has the characteristics of fast extraction speed, short time (1/3 shorter than conventional methods) and high extraction rate. General extraction steps are: a certain amount of tea placed in the microwave extractor, add the right amount of water, and then the equipment control at the required temperature and time, start heating extraction, and then filtered to get the tea juice.

5. Microwave sterilization of tea beverages in the application of tea beverages in the conventional heat sterilization, due to high temperature and long hours, so that the tea aroma is subject to greater loss. The use of microwave sterilization, with better results. Microwave sterilization is the result of the combined effect of the thermal and biological effects of microwaves. Microwave thermal effect on microorganisms is to denature proteins, resulting in the death of microorganisms; and microwave biological effect on microorganisms so that the microwave electric field changes the electrical diameter distribution of the cell membrane section, affecting the concentration of electrons and ions around the cell membrane, thus changing the permeability of the cell membrane, so that microbial growth and development is inhibited and death. In addition strong enough microwave electric field can lead to do biological DNA, RNA in the hydrogen bond relaxation, breakage and reorganization. Thus inducing genetic mutations. As microwave sterilization uses the thermal and non-thermal effects of biological damage, therefore, its sterilization temperature Conventional methods, which is conducive to the maintenance of the aroma of tea beverages.

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