Novel recycling comprehensive utilization technology for agricultural and forestry waste

Abstract

The invention provides a novel recycling comprehensive utilization technology for agricultural and forestry waste, relating to the technical field of recycling high-efficiency comprehensive utilization of the agricultural and forestry waste. The novel recycling comprehensive utilization technology for agricultural and forestry waste comprises the steps that the collected agricultural and forestry waste or other biomass raw materials are pretreated, and then are sent into a primary-separation device through conveying equipment, hemicelluloses in the agricultural and forestry waste raw materials are separated out and are subjected to anaerobic fermentation so as to generate biogas or prepare a furfural product, and solid matters are subjected to secondary separation; liquid separated out and rich in the hemicelluloses is precipitated, pre-acidified, adjusted and the like and then enters an anaerobic digestion system so as to generate biogas. The novel recycling comprehensive utilization technology for agricultural and forestry waste has the advantages that the used raw materials are agricultural and forestry waste, the quantity of raw material sources is large, the raw materials are wide in distribution and low in cost, and the agricultural and forestry waste resource is comprehensively utilized at high efficiency. The novel recycling comprehensive utilization technology can be used for preparing series of products such as biochemical fibers, celluloses, biogas electric power and biomass briquette forming fuels, is high in resource yield and has remarkable environmental protection benefit.

Description

Technical field: [0001] The invention relates to the technical field of high-efficiency comprehensive utilization of agricultural and forestry waste resources, in particular to a new process for comprehensive utilization of agricultural and forestry waste resources. Background technique: [0002] Furfural is mainly used as a chemical solvent, and as an intermediate in the synthesis of fragrances, furfuryl alcohol, and tetrahydrofuran. For the furfural production technology at the present stage, due to the need to use a large amount of acid in the production process, the aldehyde residue is soaked in the acid solution, causing the fiber to become brittle and difficult to be reused, causing serious pollution to the environment. And the product is single, and small-scale production is difficult to make a profit. Invention content: [0003] The technical problem to be solved by the present invention lies in the traditional mode of "single technology, single product" usually a...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention lies in the traditional mode of "single technology, single product" usually adopted in the processing process of agricultural and forestry waste resources. The effective separation of the three major components in waste materials—cellulose, hemicellulose and lignin, and the creation of an aqueous solution of hemicellulose hydrolyzed for the first time to produce biogas and generate electricity after anaerobic fermentation, while the fermented biogas Liquid is used as a nutrient solution for soilless cultivation to grow organic vegetables and organic flowers; cellulose products are used as raw materials for papermaking and textile industries and the production of carboxymethyl cellulose; lignin products are used to partially replace petroleum-based chemical raw materials—phenol , to prepare modified phenolic resin, which is widely used in sheet adhesives, foam insulation materials and casting industries

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