Multiple-magnetron type large-capacity microwave-assisted extraction machine and microwave-assisted extraction method thereof

Abstract

The invention discloses a multiple-magnetron type large-capacity microwave-assisted extraction machine and a microwave-assisted extraction method thereof, belonging to the field of biological raw material extraction equipment and an extraction method. The multiple-magnetron type large-capacity microwave-assisted extraction machine comprises a rack, a transmission device, a microwave tank, a microwave device, an air-entrapping device, a rotor device, a discharging device and a control device, wherein a plurality of magnetron installing holes uniformly and equidistantly distributed are formed in the wall of the microwave tank; the microwave device comprises a plurality of high-frequency magnetrons which are uniformly and equidistantly arranged on the wall of the microwave tank, and the high-frequency magnetrons are connected with an external power source; the air-entrapping device comprises a plurality of compressed air inlets formed in the wall of the microwave tank, a compressed air input pipeline and a plurality of electromagnetic valves; the rotor device comprises a rotating shaft and a plurality of stirring wings which are fixed on the rotating shaft and form certain crossing angles with the rotating shaft. The multiple-magnetron type large-capacity microwave-assisted extraction machine has the advantages that feed liquid in the microwave tank continuously runs and interchanges, an extractive is uniformly subjected to the action of an electromagnetic field to be heated, the extraction rate is increased, and the extraction time is shortened.

Description

technical field [0001] The invention relates to a biological raw material extraction equipment and an extraction method, in particular to a multi-tube large-capacity microwave extraction machine and a microwave extraction method thereof. Background technique [0002] At present, the use of microwave ovens for the extraction of biological raw materials is limited to small laboratory tests, and has not been used in actual production, and there is no large-capacity microwave extraction production equipment for sale on the market. The principle of microwave extraction has been confirmed by experiments: on the one hand, the microwave radiation process is that high-frequency electromagnetic waves penetrate the extraction medium and reach the internal vascular bundle and glandular system of the material. Due to the absorption of microwave energy, the internal temperature of the cell rises rapidly, making the internal pressure of the cell exceed the capacity of the cell wall expansi...

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Problems solved by technology

The sample volume of microwave extraction in the laboratory is too small, and the extraction rate is high. However, the microwave extraction equipment in the laboratory is designed and applied to the existing extraction equipment after engineering amplification design, that is, a high-frequency magnetron is added to the traditional extraction tank. , there are still many unresolved technical problems, and microwave technology cannot be fully utilized. At present, there is no large-capacity microwave extraction equipment for sale on the market.

The microwave frequency used in the microwave application engineering system is 915-2450MHz. At present, the microwave frequency used for microwave extraction in China is mostly 2450MHz, its wavelength is 12cm, and the penetration heating depth of water is 2-3cm. Although there is a rotor in the middle of the microwave extraction tank The device rotates, and the material liquid always rotates in one direction during the rotation process. The material in the middle cannot be rotated well to the side and cannot be in good contact with the microwave source. There is no microwave source in the upper, lower, and middle positions. This has become some Dead zone, most of the large-volume microwave extracts in the middle of the extract are not affected by the electromagnetic field, the extraction is incomplete, the extraction time is long, and the extraction rate is low. Taking Ginkgo biloba as an example, the extraction rate of Ginkgo biloba is 1.5-1.7%. The extraction time is about 4.5 hours, which is similar to the traditional tank. If the time is less, it is not as good as the traditional tank, which greatly wastes resources

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