Solid Fuel from Waste Wood Paper and Thermoplastic Resin
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Solution Overview
Problem
The disposal of waste wood, paper, and plastics is inefficient, with most being burnt due to high collection and sorting costs, and these materials have limited recycling as energy sources.
Innovation Solution
A solid fuel is created by mixing broken waste wood and paper with a small amount of thermoplastic resin, which acts as a binder, allowing for molding into a high-heat generating fuel with minimal harmful gas and residue production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If waste wood, paper and plastics are burnt for disposal, then disposal is achieved, but harmful gases and residues are produced in large quantities
Solution Approach 1:
The invention changes the physical and chemical parameters of the waste materials by controlling particle size (0.5-5mm), moisture content (10-30%), and formulation ratios (wood 40-70%, paper 20-50%, plastic 5-20%). These parameter changes enable the waste mixture to be molded into solid fuel pellets that burn more completely and produce fewer harmful emissions compared to direct burning of raw waste
Solution Approach 2:
The invention creates a composite fuel material by combining three different waste materials (wood, paper, and plastics) in specific ratios. This composite structure allows the materials to complement each other during combustion - the plastics provide binding and combustion stability, while wood and paper provide bulk and sustained burning, resulting in a fuel that produces fewer harmful gases and residues than burning individual materials separately
2Stability of the object's composition
If waste wood and waste paper are broken into small pieces and mixed with thermoplastic resin, then a solid shape is maintained during combustion, but the complexity of the manufacturing process increases
Solution Approach 1:
The thermoplastic resin in the mixture serves a dual function: it acts as both a binder to hold the wood and paper particles together, and as a fuel component that contributes to combustion. This self-service approach eliminates the need for separate binding agents or complex pressing mechanisms, simplifying the overall manufacturing process while maintaining solid shape stability during combustion
Solution Approach 2:
By controlling the particle size of wood and paper to 0.5-5mm and the moisture content to 10-30%, the invention creates optimal conditions for the thermoplastic resin to bind the particles effectively. These parameter changes ensure that the mixture forms stable solid shapes during molding and maintains structural integrity during combustion, without requiring overly complex manufacturing equipment
3Use of energy by moving object
If a large amount of waste plastics is used in the solid fuel, then the fuel generates more heat, but dechlorination processes are required to suppress combustion troubles
Solution Approach 1:
The invention uses a moderate amount of thermoplastic resin (5-20%) rather than large quantities. This partial action is sufficient to provide binding and combustion stability while avoiding the excessive plastic content that would require dechlorination processes. The optimized ratio achieves adequate heat generation without the harmful effects of high plastic content
Solution Approach 2:
By controlling the plastic content to 5-20% and selecting appropriate types of thermoplastic resins, the invention optimizes the combustion characteristics of the solid fuel. This parameter control ensures adequate heat generation while minimizing chlorine emissions and combustion troubles that would occur with higher plastic content, eliminating the need for dechlorination processes
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 resulting solid fuel effectively generates a large amount of heat while producing very small amounts of harmful gases and residues, making it suitable for electric power generation and reducing the need for dechlorination processes.
Implementation Method 1
waste wood is used in a predetermined ratio, a predetermined small amount of waste plastics is mixed with these, and the resulting mixture is heated and molded, the obtained product is effective as a solid fuel for generating electric power which can maintain a solid shape with a predetermined size due to the function of the plastics as a binder
Implementation Method 2
a solid fuel which is obtained by making effective use of wood, paper and plastic wastes, produces a harmful gas and a residue in as small quantities as possible after combustion and generates a large amount of heat
Data Source
AI summary
A solid fuel molded out of a mixture of wood pieces having a size of 1 to 25 mm, paper pieces having a size of 1 to 25 mm and thermoplastic resin, wherein the mixture contains 80 to 95 parts by weight of the total of the wood pieces and the paper pieces and 5 to 15 parts by weight of the thermoplastic resin, and the weight ratio of the wood pieces to the paper pieces is 20:80 to 90:10.The solid fuel which generates a stable amount of heat is manufactured by using waste wood, waste paper and waste thermoplastic resin in a well-balanced ratio.