Screw rod injection type plant fibre steam blasting device and method

Abstract

The invention discloses a screw injection type device for vegetation fiber steam-explosion and a method thereof. The device comprises a charging barrel which is internally provided with a squeezing screw rod matching the charging barrel; a feed inlet and a feed outlet are arranged on the charging barrel; a quick opening valve is arranged at the feed outlet; the squeezing screw rod is driven by a driving mechanism; an advancing mechanism is arranged at the rear end of the squeezing screw rod and a temperature controller is arranged on the charging barrel. The invention can respectively controlthe explosion pressure, the temperature and the retention time and has better suitability; therefore, while fiber cell separation is realized by vegetation fiber steam-explosion, modifying agent can be added in to realize in-situ modification of vegetation fiber, thus satisfying diverse application requirements of vegetation fiber.

Description

technical field [0001] The invention relates to a screw injection type plant fiber steam explosion device and method. Background technique [0002] Plant resources are renewable and degradable biological resources. Plant fibers are natural composite materials. The cellulose is a highly crystalline polymer material with high mechanical properties. The hemicellulose has a low degree of polymerization and is easy to degrade. Using low-cost agricultural and forestry waste plant fibers to prepare plant fiber / degradable polymer material composite materials and improve the performance of composite materials will be an important way to develop fully degradable environmentally friendly packaging materials. [0003] In the current plant fiber / polymer composite materials, most plant fibers are only pulverized and compounded with polymer materials after a certain surface treatment. The performance decreases, and the plant fiber with a certain aspect ratio can improve the mechanical pro...

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Problems solved by technology

[0005] Most of the current steam explosion devices are intermittent. Put the measured plant fiber into the steam explosion tank, and then pass in a certain pressure of saturated steam. After maintaining the pressure for a period of time, open the quick-opening valve to release the pressure to realize steam explosion; The steam explosion method using saturated steam, on the one hand, requires a steam generation system, which increases the investment cost of the equipment. More importantly, the saturated steam pressure is related to the temperature. When the explosion pressure is increased, the temperature must also be increased. Therefore, the temperature and pressure It is difficult to control separately, and in many applications, too high temperature will cause great damage to the properties of plant fibers, and then it is impossible to accurately control the reaction time, and the quality of the fibers obtained after the reaction is not high

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