Biomass fuel preparation method

Abstract

The invention discloses a biomass fuel preparation method and relates to the technical field of fuel processing. The biomass fuel preparation method comprises the working procedures of raw material pretreatment, steam explosion, sterilization cultureculturing, saccharification sterilization treatment, co-fermentation and mixed adsorption extrusion. Four raw materials are efficiently dried througha counterflow vibration technology, through steam explosion, hemicellulose in straw is decomposed into oligomer dissolved in water, lignin is subjected to bond rupture due to allyl ether to generate low-molecular matter, thus subsequent fermentation treatment is facilitated, and co-fermented biological fuel obtained after sterilization treatment and co-fermentation further contains high-purity liquid ethyl alcohol in addition to flammable cellulose and the lignin; and the co-fermented biological fuel is adsorbed into loose and porous modified coconut shell activated carbon and sepiolite fabricwithout the high-temperature and high-pressure harsh conditions, the raw material treatment cost and processing cost are greatly lowered, the combustion calorific value is stable, and the raw material heat utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of fuel processing, in particular to a method for preparing biomass fuel. Background technique [0002] Biomass fuel is made of biomass waste such as straw, rice husk, sawdust, and sawdust, and then mechanically pressurized to compress the original loose and amorphous raw materials into a solid shape with a certain shape and high density. Fuel, it has the advantages of small size, high density, convenient storage and transportation, stable combustion, long cycle, high combustion efficiency, and low content of ash and smoke pollutants. [0003] In general, industrial boilers mainly use woody biomass particles with a diameter of 8-10mm and a length of 25-35mm as fuel. The main technical indicators are: diameter 6-12mm, length 2-4 times the diameter, Bulk density greater than 600kg / m 3 , the broken rate is less than 1.5%-2.0%, the dry basis moisture content is less than 10%-15%, the ash content is less than 1...

AI Technical Summary

Problems solved by technology

[0005] However, it has been found through research that the biomass fuel preparation process in the prior art still has the following problems: 1. The high-temperature and high-pressure pressing process currently used is to mix raw materials in a solid state and then extrude them under high-temperature and high-pressure environments. The processing cost is high. Although the finished product has a high calorific value of combustion, the fluidity of the raw material is poor, the heat released during the combustion process is slow, and the heat utilization rate of the raw material is low; 2. The raw material composition is complicated, such as seaweed, table leftovers, sewage sewage Mud, these raw materials contain more harmful components such as salt, sulfide, chloride, etc., but the detailed treatment steps are not disclosed, and the quality of the fuel after molding cannot be guaranteed; 3. Commonly used raw materials such as straw and sawdust lack consistent The processing and crushing process make the fuel components release in different degrees, making it difficult to ensure uniform mixing, which increases the difficulty of subsequent pressing