Microwave jujube drying equipment
Red jujube processing of heating, drying, sterilization process, such as microwave technology, can be applied to heat up quickly, high efficiency, good penetrability, pollution-free, easy to operate and other advantages.Therefore, the microwave technology used in jujube processing is a kind of development trend.
1.1 microwave inhibit jujube postharvest nutrition degradation
1.2 microwave dried jujube drying methods have natural dried, air dried, microwave drying, vacuum freeze drying, eLD.Vacuum freeze drying, aLDhough has the good quality, energy consumption, high cost, not suitable for mass consumption.General hot air drying process, the material of external heat, surface drying, heat transfer, the direction and the direction of water diffusion transfer instead, affected the moisture to evaporate.Microwave is the part of the internal heating water content high warming faster.Therefore in the process of microwave drying, moisture from the inner to the outer migration speed, drying speed is obviously faster than the hot air drying, studies have shown that the microwave drying than hot air drying energy saving 30%.
Application of microwave drying jujube has the following advantages:
(1) drying speed is fast;
(2) the products are of good quality,
Because jujube surface temperature is not too high, less oxidative Browning, colour and lustre is red and resistance to hide, aroma loss, less dry even, at the same time due to the evaporation speed, easy to form porous, product with good water complex taste good.(3) the external heat loss, high thermal efficiency;(4) as a simple, pollute the environment.But due to the restriction of microwave equipment, microwave drying capacity is not high.
|
 
|
Please contact me:AliWangwang:cn1510382150