Solid Fuel Production from Waste Using Magnetic Sorting
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Solution Overview
Problem
Conventional methods for manufacturing solid fuel from waste materials suffer from low production yield, high initial costs due to the need for multiple apparatuses, and the mixing of ferrous and nonferrous metals with waste, which prevents profitable separation and utilization.
Innovation Solution
A method involving a series of sorting and crushing devices, including magnetic sorters, oscillating particle-size sorters, and a high-speed inertia pulverizer, to selectively process combustible waste materials, maximizing fuel production and separating ferrous and nonferrous metals for profitable recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods use multiple unit apparatuses for sorting and processing waste materials, then the separation of combustible components can be achieved, but the initial installation costs increase prohibitively and the production yield remains low at about 50%
Solution Approach 1:
The patent combines multiple sorting functions (magnetic sorting for ferrous metals, particle size sorting, and wind power sorting for light/heavy materials) into an integrated processing system. The waste material undergoes sequential processing through combined apparatuses that perform multiple separation operations in one continuous flow, thereby increasing production yield while managing device complexity through functional integration
Solution Approach 2:
The processing system is divided into distinct operational stages: initial magnetic sorting to remove ferrous metals, particle size classification to separate combustible components, and wind power sorting to separate light and heavy materials. Each stage handles specific separation tasks, allowing the system to achieve high production yield through systematic segmentation of the sorting process
2Loss of substance
If ferrous and nonferrous metals are separated using conventional methods, then metal recovery can be achieved, but the metals are discharged mixed with waste material, preventing profitable utilization
Solution Approach 1:
The patent extracts ferrous metals from the waste material stream using magnetic sorting apparatus positioned at strategic points in the processing line. By removing ferrous metals early in the process and separating them from the combustible waste stream, the system enables independent recovery and profitable utilization of metal resources while maintaining high production yield of solid fuel from the remaining combustible materials
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 method significantly increases the yield of solid fuel production, effectively separates and recovers valuable metals, and enhances the economic viability by maximizing the recovery of combustible waste materials, overcoming the limitations of conventional methods.
Implementation Method 1
separation of ferrous metals using magnetic sorting
Implementation Method 2
separation of light and heavy materials for wind power sorting
Implementation Method 3
secondarily crushing the waste material having a large particle size using an impact crusher
Data Source
AI summary
A method of manufacturing a non-molded solid fuel using a combustible waste material includes (a) primarily crushing an inflowing waste material using a bag-tearing and crushing device, (b) separating iron from the primarily crushed waste material using a first magnetic sorter, (c) sorting the waste material, from which the iron is separated, according to the particle size of the waste material using a first oscillating multi-stage particle-size sorter, (d) secondarily crushing the waste material having a large particle size using an impact crusher, (e) separating the iron from the secondarily crushed waste material using a second magnetic sorter, (f) sorting the waste material, from which the iron is separated, according to the weight of the waste material using a wind power sorter, (g) separating the iron from a light material, and (h) pulverizing the waste material, from which the iron is separated.