Tunnel type continuous microwave solid-liquid countercurrent extraction system

Abstract

The invention discloses a tunnel type continuous microwave solid-liquid countercurrent extraction system, which comprises an extraction cavity (5), a microwave magnetron (1), a conveying belt (7), high overflow grooves (4), a pump (9) and receiving grooves (16), wherein the front and back ends of the extraction cavity have openings; the conveying belt passes through the front and back ends of theextraction cavity and has micropores which are distributed uniformly; conveying belt supporting bodies (11) are arranged at intervals on the lower end of the conveying belt in the extraction cavity; the high overflow grooves are arranged on the internal upper end of the extraction cavity at intervals; the rear end of the outer side of the extraction cavity (5) is provided with a high groove (15) which is communicated with a high overflow groove (4) on the internal rear end of the extraction cavity (5); the receiving grooves (16) are arranged on the internal lower end of the extraction cavity (5) at intervals; and the receiving grooves (16) are communicated with the high overflow grooves (4) by the pump (9) respectively. In the invention, the micro waves irradiate only a layer of thin solid-liquid mixture, the dimension of the layer of thin solid-liquid mixture is smaller than the penetration depth of the microwaves, and thus, the microwave extraction efficiency is improved greatly.

Description

technical field [0001] The invention relates to a tunnel type continuous microwave extraction device, in particular to a solid-liquid extraction device which organically combines microwave and continuous countercurrent extraction to realize continuous microwave extraction process and can be widely used in pharmaceutical, food, biological and Chemical and other industries. Background technique [0002] The traditional classic solid-liquid extraction method mainly uses water or organic solution as the solvent, and leaches the solid matter and extracts the active ingredients by direct or indirect steam heating. Microwave extraction technology has the characteristics of high efficiency and rapidity, and countercurrent extraction is a better extraction method, which can always maintain a high extraction driving force and high extraction efficiency. Combining the two, you can give full play to the strengths of the two and obtain high extraction efficiency. [0003] Chinese inven...

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Problems solved by technology

The application number is 200510096079.3 The structure of the microwave countercurrent extraction device adopts the general idea of ​​the Chinese invention patent 200410027563.6, and the original italic extractor is laid flat, but the main problem is that (1) it is difficult to discharge the solid material after extraction; (2) it is difficult to Realize real countercurrent; (3) It is difficult to feed materials

The Chinese invention patent with the application number 200610124105.3 maintains the italic structure. The solid material enters from the feed port. The motor and transmission drive the rotating shaft to rotate, which in turn drives the transmission blade to rotate, so that the solid material is driven upwards and discharged directly from the slag discharge port. During this process, the flow rate of the extraction agent (water or other solvents) is controlled by the electromagnetic valve, enters from the solvent inlet and flows downward, and moves in the opposite direction with the solid material to realize countercurrent extraction, and the extraction liquid is discharged from the juice outlet at the lower end; the invention Although it can well solve a series of problems in the invention patent 200510096079.3, the processing precision of the equipment is high, and the cost is too high; moreover, the materials are transported by the moving transmission blades, and the material accumulation is thick, which affects the function of the microwave.

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