Microwave continuous freeze-drying system

Abstract

The invention discloses a continuous vacuum freeze-drying system using microwave energy as a heat source, belonging to the technical field of freeze-drying. The system comprises a microwave vacuum freeze-drying device, a vacuum water catching device, a vacuum feed device and a vacuum discharge device, wherein the microwave vacuum freeze-drying device is internally provided with a combined type freeze-drying cabin consisting of a normal-pressure microwave cavity and a vacuum microwave cavity, and the normal-pressure microwave cavity and the vacuum microwave cavity are partitioned by a microwave-transmitted vacuum partition board; the vacuum microwave cavity is connected with a steam channel of the vacuum water catching device; and the vacuum microwave cavity and the steam channel are partitioned by a porous ventilate microwave shielding board. The invention solves the problem of microwave disruptive discharge within a vacuum pressure range required by freeze-drying, has the advantages of good sealing property, high utilization ratio and high freeze-drying speed and can be used for effectively realizing the application of automatic industrialization.

Description

technical field [0001] The invention relates to a continuous vacuum freeze-drying system using microwave energy as a heat source, belonging to the technical field of freeze-drying. Background technique [0002] Vacuum freeze-drying (hereinafter referred to as freeze-drying) is carried out below zero degrees Celsius, even (-60)-(-70) degrees Celsius, and under the condition of vacuum anoxic. During the drying process, the chemical and biochemical reactions in the processed material (hereinafter referred to as the material) can be minimized; the volatilization of the ingredients can be reduced; there is basically no shrinkage and deformation after drying. Compared with ordinary drying methods, it can keep the original shape and composition of materials well. At present, freeze-drying is mainly used in fields such as medicine, food, biology, and chemical industry. [0003] Freeze-drying has experienced hundreds of years of development, and a second-generation freeze-drying eq...

AI Technical Summary

Problems solved by technology

This system is aimed at the defects of 15-30 hours for traditional freeze-drying (15-30 hours for materials to be freeze-dried to qualified moisture), long freeze-drying cycle, huge equipment, expensive cost, and low efficiency. The freeze-drying time is shortened, and the problem of microwave breakdown discharge under the vacuum pressure range required for freeze-drying is solved. The sealing performance is good, and the generated microwave cannot break down the electric field. The feeding, freeze-drying, and discharging of the freeze-drying device of the present invention are simultaneously high utilization rate; due to the use of a composite freeze-drying warehouse and continuous feeding and discharging methods, the freeze-drying process of materials in the vacuum microwave cavity is continuous, and the utilization rate of the vacuum water catcher is high; the freeze-drying rate is fast and can effectively Realize automatic industrial application

Images