Biomass Torrefaction Reactor with Segmented Zones
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biomass drying and roasting technologies face challenges such as high energy costs, inefficient effluent treatment, and non-uniform heat treatment, particularly in geographically isolated areas where decentralized treatment is needed, and existing solutions are not effectively industrialized or transportable.
Innovation Solution
A multi-stage reactor with distinct drying and roasting zones, utilizing heat pipes for temperature control and optimized heat exchanges, and a transfer and sealing system to ensure uniform treatment and efficient effluent management, allowing for transportability and use in isolated areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If biomass is dried and roasted in a single-chamber reactor, then the device complexity is reduced and transportability is improved, but the uniformity of heat treatment deteriorates due to inability to separate drying and roasting zones
Solution Approach 1:
The reactor chamber is segmented into distinct drying and roasting zones separated by a partition wall, allowing independent temperature control and uniform heat treatment in each zone while maintaining a compact single-chamber structure for transportability
Solution Approach 2:
Different regions of the reactor are assigned different thermal characteristics - the drying zone operates at lower temperatures while the roasting zone operates at higher temperatures, with each zone optimized for its specific function to ensure uniform local heat treatment
2Manufacturing precision
If multiple floors are used in the reactor, then heat treatment uniformity is improved through better mixing, but the device complexity and transport difficulty increase
Solution Approach 1:
The reactor employs a two-floor design that segments the treatment process vertically, with the first floor for drying and the second floor for roasting, improving heat treatment uniformity while keeping the overall structure compact enough for transport
Solution Approach 2:
The reactor transitions from horizontal to vertical arrangement by stacking treatment floors, achieving better heat treatment uniformity through vertical stratification while maintaining a compact footprint that facilitates transport
3Object-generated harmful factors
If flue gas treatment is implemented, then harmful emissions are reduced, but energy consumption and operational costs increase
Solution Approach 1:
The flue gas generated during roasting is not treated as waste but is redirected to the drying zone to provide necessary heat for moisture evaporation, converting a harmful emission into a useful energy source and reducing both emissions and external energy consumption
Solution Approach 2:
The flue gas treatment system is merged with the heating system by routing roasting flue gas through the drying zone, combining emission control and heat provision into a single integrated function that reduces energy consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The reactor achieves uniform biomass treatment, reduces energy consumption, and optimizes effluent management, enabling efficient decentralized processing and storage of biomass, while being transportable and compliant with European transport standards.
Implementation Method 1
The reactor comprises heating means, in particular heat pipes, in the roasting zone and/or in the drying zone
Implementation Method 2
The reactor comprises a transfer and sealing system able to allow the transfer of the dried biomass from the upstream zone to the downstream zone at time intervals and to seal the two zones together during each interval
Implementation Method 3
the upstream zone of the chamber comprising drying means suitable for carrying out the drying of the biomass introduced into the reactor
Implementation Method 4
The reactor comprises heating means, in particular heat pipes, in the roasting zone and/or in the drying zone
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a reactor for drying and torrefying a biomass, including a chamber in the interior of which two separate areas are delimited and means for stirring and transfering the biomass from one end to the other of the chamber, the upstream area (1A) of the chamber including drying means capable of drying the biomass introduced into the reactor, and the downstream area (1B) of the chamber including torrefaction means capable of torrefying the dried biomass in the upstream area. According to the invention, the reactor includes a transfer and sealing system (5) capable of transferring the dried biomass from the upstream area to the downstream area at time intervals and producing a seal between the two areas during each interval. The invention further relates to the torrefaction of lignocellulose biomass.