Biomass supercritical and subcritical combined continuous type pretreatment and hydrolysis equipment and method

Abstract

The invention relates to biomass supercritical and subcritical combined continuous type pretreatment and hydrolysis equipment and a method. The equipment comprises a water storage tank, a material storage tank with a stirring device, a preheating system, a supercritical reaction system, a primary cooling system, a subcritical reaction system, a final cooling system, a product collection system and an electronic temperature controlling system. The method comprises the following processing steps: water reaching preheat temperature and biomass material paste are rapidly mixed and then injected into the supercritical reaction system to be pretreated under supercritical condition; the reaction product is cooled through the primary cooling system and depressurized through a pressure reducing valve and then enters into the subcritical reaction system to be hydrolyzed sequentially, therefore fermentable sugars are continuously generated and collected. The invention utilizes the advantages of the supercritical method that the reaction is rapid, activator is not required and product inhibition does not exit, realizes that the continuous hydrolysis conversion of wood fiber biomass can generate fermentable sugars, is the foundation of subsequent resource recovery technologies, such as ethanol production by fermentation and the like, and has wide application prospect.

Description

technical field [0001] The present invention relates to a special equipment and method for supercritical subcritical combined continuous pretreatment and hydrolysis of biomass resources, in particular to a supercritical subcritical combined continuous pretreatment and hydrolysis equipment and method for lignocellulosic biomass. The invention belongs to the technical field of biomass energy processing and utilization. Background technique [0002] Crop straw is one of the most potential biomass energy sources, and its recycling technology, especially ethanolization technology, has received extensive attention. There are two bottleneck factors in the production of fuel ethanol from straw: first, the structure of cellulose itself determines its difficulty in hydrolysis. Cellulose is a linear macromolecule bonded by D-glucopyranose anhydride. There are many hydrogen bonds between and within the molecule. It is highly crystalline and insoluble, which reduces the contact area wit...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a biomass supercritical subcritical combined continuous pretreatment and hydrolysis equipment and method, aiming to solve the problem that the operation of batch pretreatment and hydrolysis is not continuous, the scale of the equipment is difficult to enlarge, and the energy consumption is relatively large It can realize the supercritical and subcritical combined continuous pretreatment and hydrolysis of lignocellulosic raw materials, and provide a new and efficient way of hydrolyzing lignocellulosic biomass resources, which has broad application prospects

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