Volume fluctuation-based biomass continuous flash explosion and in situ alloying method and device

Abstract

The invention discloses a volume fluctuation-based biomass continuous flash explosion and in situ alloying method and device. According to the method, water on a biomass surface is converted into subcritical water under the high pressure generated by volume compression and the effect of external heating; the subcritical water permeates into the biomass; when the volume is suddenly released, the pressure drops sharply, and the subcritical water vaporizes and swells so as to generate an acting force to the outside, so that once flash explosion can be finished; multiple flash explosions can be realized through a plurality of volume fluctuation periods. Flash explosion products and plastics continue to complete in situ continuous alloying under the effects of extrusion and stretching of the volume fluctuation and the effect of external heating, so as to acquire a biomass composite. The device is an eccentric runner device which is equipped with a flash explosion part and an alloying part successively arranged along a conveying direction, wherein the volume compression and releasing of an accommodating chamber between an eccentric runner and a stator have a periodic fluctuating change.According to the method, the problem of fiber breaking under a strong shearing effect of a screw rod can be solved, the dispersing performance of the biomass is improved, the device structure is simplified and the process operation is reduced. The invention belongs to the technical field of composite material processing.

Description

technical field [0001] The invention relates to the technical field of composite material processing, in particular to a method and equipment for continuous flash explosion and in-situ blending of biomass based on volume pulsation. Background technique [0002] Biomass composite materials are a new generation of green and environmentally friendly materials that have flourished internationally in recent years. The main raw materials are biomass materials (such as straw, wood, bamboo, sisal and animal feathers, etc.) and plastics. Biomass composite materials are low in cost and can replace wood and plastic products, and their application fields are constantly expanding. [0003] However, the structure of biomass is compact. For example, plant material has a dense layered structure with cellulose as the skeleton, hemifiber and lignin as binders; animal feathers are folded from highly resistant and rigid fibrous keratin tight structure. Therefore, it is necessary to use the fl...

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Problems solved by technology

[0006] Aiming at the technical problems existing in the prior art, the object of the present invention is to provide a method for continuous flash explosion and in-situ blending of biomass based on volume pulsation, which utilizes the continuous sudden change in pressure generated by volume compression and release of periodic pulsation changes Realize multiple consecutive flash explosions of biomass to solve the problems of poor flash explosion effect of existing biomass flash explosion methods, greatly reduced fiber length, long thermomechanical process, etc.; at the same time, use the stretching and extrusion effect generated by volume pulsation Make the product obtained by flash explosion continue to be blended with the added plastic, realize in-situ continuous blending, and solve the uneven dispersion of biomass and plastic blending, and the non-synchronous and continuous blending of biomass materials and plastics will cause equipment Complex and cumbersome issues

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