Solid Biomass Fuel Torrefaction Process
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Solution Overview
Problem
Existing biomass fuel production processes face challenges with non-homogeneous particle sizes, high ash content, and difficulty in cultivating and harvesting biomass sources, leading to inefficient and costly fuel production with inadequate waterproof characteristics.
Innovation Solution
A process involving pulverizing biomass sources like Calliandra calothyrsus, Acacia mangium, Albizia chinensis, and Hevea brasiliensis, followed by molding and heating to induce torrefaction, which controls density and uniformity, resulting in a solid biomass fuel with improved mechanical durability and waterproof properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If biomass is crushed and molded into blocks, then the fuel achieves sufficient handleability during storage, but the particle size homogeneity deteriorates
Solution Approach 1:
The biomass processing is divided into two distinct stages: first crushing to particles of 1-10mm for homogeneity, then molding into larger blocks for handleability. This segmentation allows each stage to optimize for its specific purpose without compromising the other.
Solution Approach 2:
The crushing and sizing operation is performed preliminarily before the molding operation. By preparing the biomass particles to the correct size range first, the subsequent molding process can focus solely on creating handleable blocks without compromising particle size distribution.
2Ease of manufacture
If traditional biomass sources like trees are used, then the fuel can be produced, but the difficulty in cultivating and harvesting increases production costs
Solution Approach 1:
The invention changes the fundamental parameter of biomass source selection from traditional tree-based materials to agricultural residues and fast-growing grasses. This parameter change dramatically reduces cultivation complexity and harvesting difficulty while maintaining fuel production capability.
Solution Approach 2:
The process utilizes agricultural residues and short-cycle grasses that are inexpensive, readily available, and require minimal cultivation infrastructure. These materials can be harvested annually or even multiple times per year, reducing both capital and operational costs compared to tree-based biomass.
3Device complexity
If biomass fuel is produced without controlled density molding, then the production process is simpler, but the mechanical durability and waterproof characteristics deteriorate
Solution Approach 1:
The molding process controls key parameters including compression pressure, particle density, and block geometry. By optimizing these parameters, the process achieves high mechanical durability and waterproof characteristics while maintaining reasonable process complexity through standard molding equipment.
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 process produces a solid biomass fuel with enhanced homogeneity, reduced ash content, and increased waterproofness, making it suitable for commercial-scale production and efficient combustion with reduced costs and improved storage and transportation capabilities.
Implementation Method 1
heating to induce torrefaction
Data Source
AI summary
The present invention relates to a process for producing a solid biomass fuel, as well as a solid biomass fuel produced by said process. Additionally, the present invention relates to a combustion process comprising combusting said solid biomass fuel so as to produce energy.