A microwave heating system of Boluohui vacuum freeze dryer

Abstract

A microwave heating system of a macleaya cordata vacuum freeze dryer comprises an annular freeze chamber (10), wherein the annular freeze chamber (10) is rotatably and centrally symmetrically providedwith at least n insertion arms (40) with a rotation axis (o-o), and a plurality of macleaya cordata drying boxes (8) are inserted into each insertion arm (40) side by side; N microwave heating mechanisms (70) are vertically arranged corresponding to the n insertion arms (40), each microwave heating mechanism (70) comprises a microwave heating zone (74), and the macleaya cordata drying boxes (8) of each insertion arm (40) are positioned in the corresponding microwave heating zone (74); and the microwave heating system also comprises a rotary translational driving machine (20) drivingly connected to the insertion arms (40), and the rotary translational driving machine (20) can switch between a rotary output state and a linear movement output state. The microwave heating system of the macleaya cordata vacuum freeze dryer perfectly realizes the switching between automatic continuous loading and unloading and linear movement through the drying zones, has high temperature uniformity of thematerials in the drying boxes, simplifies the structure, and has high efficiency.

Description

technical field [0001] The invention relates to the technical field of Chinese herbal medicine processing, in particular to a microwave heating system of a Boluohui microwave vacuum freeze dryer. Background technique [0002] The stems, leaves and fruits of Boluohui all contain alkaloids. The first step in the purification of alkaloids is vacuum freeze-drying. Freeze-drying is generally divided into three main processes: pre-freezing, sublimation, and analysis, and the sublimation and analysis processes are completed in the drying chamber. During the drying process, assuming that the supplementary heat required for ice sublimation is provided by microwave heating, there is an equilibrium between the phase change latent heat of ice sublimation and microwave heating. [0003] A microwave generator is a device that generates microwave energy and is the core component of a microwave heating system, usually consisting of a microwave power supply and a magnetron. The function o...

AI Technical Summary

Problems solved by technology

However, the five small freeze-drying chambers must be fully filled to achieve the matching effect, which does not conform to the actual situation used in reality. There are often situations where large cold traps pull small freeze-drying chambers

[0006] The most difficult thing to guarantee when using microwave heating in freeze-drying equipment is the problems of 1) low utilization rate of microwave energy, 2) uneven heating, and 3) hot spots, which are common problems in the industry.

Images