A biomass pyrolysis co-production gas/biochar production process

Abstract

The invention discloses a biomass pyrolysis gas / charcoal co-production device and process. The co-production device comprises a fluidized bed gas burner, a pyrolysis gasification auger, a vapor discharge system, a charging device, a gas-charcoal separation device, a high-temperature gas booster fan, an air preheater and other equipment. The production process comprises the steps that biomass materials are conveyed into the pyrolysis gasification auger for pyrolysis and gasification reaction; in the reaction process, water vapor generated at the drying layer is discharged through the vapor discharge system, charcoal generated after pyrolysis and gasification and high-temperature biomass gas with a low heating value are separated through the separation device to obtain high-quality charcoal, and a part of the generated high-temperature biomass gas with the low heating value is output into the fluidized bed gas burner for reaction; meanwhile, bed materials are fluidified to supply heat to the pyrolysis gasification auger so as to keep the pyrolysis and gasification reaction continuous. By the adoption of the process, the method is advanced, production equipment is simple and reliable, the yield rate of charcoal from biomass is high, and the production effect is good.

Description

technical field [0001] The invention belongs to the technical field of biomass utilization, and in particular relates to a biomass pyrolysis co-production gas / biochar production process. Background technique [0002] With the increasingly prominent global energy and environmental issues, the development of new energy sources has become an urgent task. As a clean energy source, biomass has a net carbon dioxide emission to the atmosphere that is close to zero. The content of nitrogen and sulfur in biomass is extremely low, and the emissions of nitrogen oxides and sulfides are very low during energy conversion. Vigorously developing biomass fuel resources will help improve my country's energy structure dominated by fossil fuels and reduce emissions of sulfides and nitrogen oxides. This will not only alleviate the greenhouse effect, but also reduce the content of carbon dioxide in the atmosphere. my country is rich in biomass fuel resources. The total amount of biomass resourc...

AI Technical Summary

Problems solved by technology

my country is rich in biomass fuel resources. The total amount of biomass resources that can be used as energy in the country is about 460 million tons of standard coal per year, but currently only 22 million tons of standard coal are used, and the utilization rate is less than 5%. Most of them still use incineration, Landfill and other means to deal with serious pollution

However, many links such as biomass collection and transportation in my country are relatively extensive, and the characteristics of biomass itself cause the available biomass to have the characteristics of high moisture, low calorific value, and high alkalinity. The degasification process leads to low carbon production rate and poor economic benefits, and when the biomass raw material has high moisture content, the gasification is unstable

Images