Periodic peristaltic agitation method

Abstract

The invention discloses a periodic peristaltic agitation method from the point of bionics and according to the principle of intestinal peristalsis and periodic stimulation effect. One or more devices generating periodic peristalsis is distributed in a reactor. The internal part of the device is isolated from materials in the reactor by using elastic materials. The elastic materials are controlledto be periodically expanded and contracted through the movement of the materials in the device. When the elastic materials are expanded, the points of the elastic materials in contact with the materials move along the direction of the materials to generate normal acting force which is perpendicular to the movement direction and is applied to the materials, so materials move along the direction ofthe normal acting force under the pushing effect of the acting force; and when the elastic materials are contracted, the movement direction of the materials is reverse. Thereby, with the periodic expansion and contraction of the materials in the device, the materials in the reactor alternately do peristaltic movement under the periodic normal acting force. The method strengths heat transfer and mass transfer through the normal acting force, is suitable for reactors for chemical industry, microorganism fermentation, cell culture and the like and can be industrially scaled.

Description

technical field [0001] The invention belongs to the technical field of stirring, in particular to a periodic peristaltic stirring method. Background technique [0002] Stirring is a very effective strengthening method for uniformly mixing gas, liquid and solid materials. Stirring methods can be divided into mechanical stirring and non-mechanical stirring. Traditional mechanical stirring is used in various industries such as chemical reaction, microbial fermentation, and concrete mixing. It mainly enhances the relative movement and mixing between gas-liquid, liquid-solid interfaces, and uses the momentum transfer means of tangential friction to enhance the mass transfer of the interface. heat transfer. The application of mechanical agitation in various industries, according to the specific physical process and chemical process, the form or type of mechanical agitation is different, and the impact on materials is also different. For example, when mechanical agitation is appl...

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Problems solved by technology

[0008] At present, mechanical agitation mainly uses shear force to enhance mass transfer and heat transfer, while non-mechanical agitation such as air flow agitation only emphasizes gas-liquid mass transfer, direct contact of external air flow with materials may cause bacterial contamination, and conventional flexible kneading and agitation is difficult for industrial scale-up, etc. Problem, from the perspective of bionics, the present invention proposes a periodic peristaltic stirring method based on the principle of intestinal peristalsis and periodic stimulation, which avoids the influence of shear force on microorganisms, and uses periodic normal force to strengthen heat transfer, Mass transfer, the material in the reactor is outside the peristaltic stirring device, and the charging amount is not limited by the volume shrinkage of the peristaltic stirring device, which is convenient for industrial scale-up

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