Process and apparatus for positive pressure biomass gasification and co-production of charcoal

By using a positive pressure biomass gasification and co-production charcoal process, and by using a variable frequency centrifugal fan to regulate the fluidizing air and air gasification agent, the problem of adjusting the product ratio and adapting to market demand in biomass gasification furnaces has been solved, achieving safe and reliable gasification product regulation and reducing equipment costs.

CN119799374BActive Publication Date: 2026-05-26HUBEI XISAISHAN POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI XISAISHAN POWER GENERATION CO LTD
Filing Date
2024-12-27
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing biomass gasifiers lack adaptability and the ability to adjust products during the gasification process. They cannot adjust the ratio of biomass fuel gas to biochar, and cannot adapt to changes in upstream raw materials and the flexibility of downstream market demand.

Method used

The process of positive pressure biomass gasification and co-production of charcoal is adopted. The supply of fluidizing air and air gasification agent is adjusted by a variable frequency centrifugal fan, the temperature of the fluidized bed gasifier is controlled, the ratio of biomass fuel gas to biomass charcoal is adjusted, and the gasification products are separated and utilized by a cyclone separator and a conveying system.

Benefits of technology

It enables safe and reliable adjustment of the gasification product ratio under positive pressure, adapting to downstream demand and upstream fuel changes, improving the adaptability and production flexibility of the gasifier, and reducing equipment costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a process and apparatus for positive pressure biomass gasification and co-production of charcoal. The process includes the following steps: transporting biomass fuel to a pre-furnace silo; feeding the biomass fuel into a fluidized bed gasifier via a positive pressure feeding system, and replenishing the fluidized bed gasifier with bed feed as needed via a bed feed supply system; gasifying the biomass fuel under the action of a centrifugal fan at the bottom of the fluidized bed gasifier, adjusting the supply of fluidizing air and air gasifying agent by a variable frequency centrifugal fan, thereby regulating the temperature of the fluidized bed gasifier and thus adjusting the ratio of generated gasified fuel gas to biochar; collecting and utilizing lumpy biochar at the bottom of the fluidized bed gasifier; and collecting and utilizing ash-like biochar at the top of the fluidized bed gasifier via a cyclone separator. This invention operates under positive pressure, better adapting to changes in downstream fuel gas and biochar demand, as well as changes in upstream biomass fuel.
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