Process method for cogenerating electricity, charcoal, heat and fertilizer through gasified gas supply of biomass

Abstract

The invention relates to a process method for cogenerating electricity, charcoal, heat and a fertilizer through gasified gas supply of biomass. The process method is characterized by carrying out gasifying by a self-drying and spouting multi-cogeneration gasifier so as to prepare hot combustible gas as fuel of a boiler, and enabling steam generated by the boiler to propel a steam turbine to generate electricity, thereby obtaining four products, i.e., electricity, charcoal, heat and a crude fertilizer simultaneously. The process method comprises the process steps: carrying out biomass pretreatment (collecting and chipping); gasifying the biomass in the multi-cogeneration gasifier; collecting the crude fertilizer; supplying the hot combustible gas, obtained after gasifying, to a gas-fired boiler through a combustor; cooling and collecting biomass charcoal; and enabling the steam generated by the boiler to propel the steam turbine for electricity generation and heat supplying. The process method has the advantages that three kinds of residues of agriculture and forestry are adopted as a raw material, so that environmental protection and the resource-converting utilization of the three kinds of residues of agriculture and forestry are facilitated; and the process is stable in operation, high in hot-combustible-gas combustion heat efficiency, diverse in product and good in economic benefit and is applicable to large-scale application.

Description

technical field [0001] The invention relates to a process method for biomass gasification, gas supply and combined production of electricity, charcoal, heat and fertilizer, which belongs to the field of biomass energy. Background technique [0002] Under the dual pressure of energy and the environment, vigorously developing clean and renewable energy has become a very urgent worldwide issue before governments all over the world. Compared with other new energy sources, biomass energy has the characteristics of being renewable, less polluting, transportable and storing, and most compatible with the current energy industry, so it has attracted special attention. China is a large agricultural country with rich agricultural and forestry biomass resources, huge quantity and diverse varieties. Under the background of favorable policies, the utilization of biomass resources has achieved considerable development in China, but at the same time, many problems in technology and equipme...

AI Technical Summary

Problems solved by technology

These gasification power generation processes only generate electricity and have no carbon products; the combustible gas produced by the gasifier during these operations contains dust and tar, and the combustible gas must be deeply purified for internal combustion engine power generation. At present, the better combustible gas purification method is Water washing and electric coke capture, electric coke capture has requirements on the oxygen content in the gas, if it exceeds the standard, safety accidents may occur, which makes the electric coke capture method unable to be popularized

The combustible gas has been washed and purified, and almost all the dust and combustible gas have been removed, but a small amount of tar remains. This small amount of tar seriously affects the operation of the internal combustion generator, resulting in a decrease in the stability and efficiency of the internal combustion generator and an increase in maintenance costs. , especially large-scale grid-connected power generation cannot run stably and is difficult to popularize and apply; this kind of process has a single product and poor economic benefits

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