Biomass fuel pretreatment equipment and pretreatment method

Abstract

The invention provides biomass fuel pretreatment equipment and method. The biomass fuel pretreatment equipment comprises a washing unit which is used for washing biomass, and obtaining an eluate and washed biomass; and a rinsing unit which is used for rinsing the washed biomass to obtain a washed substance and rinsed biomass, wherein the rinsed biomass is used as a material for preparing biomass fuel, and the eluent is used as a biogas material for generating biogas. The biomass is washed and rinsed to separate a material flow from an energy flow to realize ptimal use of things, organic matters are eluted from the biomass, impurities and potassium, chlorine, sulfur and nitrogen influencing fuel combustion are removed, and the unit heat value and the fuel quality of the fuel are improved sothat the fuel does not slag, coke or corrode a stove in the combustion process, high-quality fuel can be output to a user, the washed material flow is used as one part of a biogas raw material, afteranaerobic fermentation, a fertilizer is formed and returned to the field, and the ecological cycle of resources is completed.

Description

technical field [0001] The invention relates to the technical field of biomass fuel preparation, in particular to a biomass fuel pretreatment device and method. Background technique [0002] Due to the high content of alkali metal K in the biomass, the ash melting point is low. Cl in biomass has a corrosive effect. Without pretreatment of biomass, especially straw, it will lead to the precipitation of alkali metal elements, coking, slagging, and corrosion of thermal energy equipment during the combustion process, which will affect the combustion effect. S and N in biomass fuel will produce sulfur dioxide and nitrogen oxides after combustion, which will increase the cost of follow-up pollutant treatment in areas where boiler air pollutant emissions are strictly controlled. Part of the ash in the fuel comes from the soil entrained in the process of collecting biomass. Since it is not combustible, it reduces the unit calorific value of the fuel and also affects the combustion ...

AI Technical Summary

Problems solved by technology

Cl in biomass has a corrosive effect. Without pretreatment of biomass, especially straw, it will lead to the precipitation of alkali metal elements, coking, slagging, and corrosion of thermal energy equipment during the combustion process, which will affect the combustion effect.

S and N in biomass fuel will produce sulfur dioxide and nitrogen oxides after combustion, which will increase the cost of follow-up pollutant treatment in areas where boiler air pollutant emissions are strictly controlled

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