Construction Aggregates from Incineration Ash
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Solution Overview
Problem
Current recycling technologies for construction materials from waste sludge face challenges in varying device configurations, difficulty in processing large amounts, and environmental disturbance due to harmful gas emissions during the incineration process.
Innovation Solution
A method involving the separation of foreign substances from incineration ash, crushing and sizing, mixing with inorganic sludge and clay, vacuum extrusion, drying, firing, and gas reduction to produce construction aggregates like gravel and sand, while minimizing harmful gas emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If incineration ash is processed through traditional recycling methods, then construction materials can be produced, but harmful gases such as carbon dioxide, nitrogen oxide, and sulfur oxide are discharged during heating and combustion, disturbing the environment
Solution Approach 1:
The patent applies this principle by converting the harmful incineration ash, which contains toxic substances and heavy metals, into beneficial construction aggregate materials through a multi-step processing system. The harmful waste material is transformed into useful building materials like gravel and sand, thereby eliminating environmental harm while creating value.
Solution Approach 2:
The patent uses an intermediary processing system that includes separation, crushing, classification, mixing, and firing stages. This intermediary process chain transforms the raw incineration ash into safe construction materials, mediating between the harmful waste input and the beneficial construction material output while controlling and reducing harmful gas emissions through modern firing technology.
2Adaptability or versatility
If various recycling technologies are used for different waste sludge types, then construction materials can be manufactured, but the device configuration varies depending on waste type and it is difficult to process large amounts
Solution Approach 1:
The patent applies universality by designing an integrated processing system that can handle multiple types of waste sludge (household waste, food waste, sewage waste, construction and industrial waste) through a single unified configuration. The system includes versatile components like separators, crushers, classifiers, and mixers that can process different waste types without requiring complete device reconfiguration, thereby enabling large-scale processing capability.
Solution Approach 2:
The patent segments the processing system into distinct functional modules: separation unit, crushing unit, classification unit, mixing unit, and firing unit. Each module performs a specific function and can be independently optimized, allowing the overall system to maintain high productivity while adapting to different waste types through modular adjustments rather than complete reconfiguration.
3Ease of manufacture
If incineration ash is directly used without processing, then the process is simple, but foreign substances and contaminants remain that are unsuitable for construction use
Solution Approach 1:
The patent applies preliminary action by implementing separation and cleaning steps before the main processing stages. The separation unit removes foreign substances and contaminants from incineration ash before crushing and classification, ensuring that only suitable materials proceed to subsequent stages. This preliminary purification maintains manufacturing precision while keeping the overall process efficient and relatively simple.
Solution Approach 2:
The patent employs mechanical separation systems (magnetic separators, eddy current separators) to remove ferrous and non-ferrous metals from incineration ash. These mechanical substitution methods replace complex chemical treatment processes, maintaining ease of manufacture through straightforward mechanical operations while achieving high manufacturing precision in the final aggregate product quality.
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
This method effectively reduces costs and environmental impact by transforming incineration ash into construction aggregates while controlling and reducing harmful gas emissions, creating an eco-friendly manufacturing process.
Implementation Method 1
a first step of separating foreign substances such as ferrous components and non-ferrous components contained in continuously supplied incineration ash raw materials
Implementation Method 2
separating foreign substances such as ferrous components and non-ferrous components contained in continuously supplied incineration ash raw materials
Implementation Method 3
a sixth step of drying the saggar transferred after the fifth step so that the basic elements for construction aggregates filled inside the saggar has a moisture content set before sintering
Implementation Method 4
a seventh step of firing the saggar dried through the sixth step and forming the basic elements for construction aggregates filled inside the saggar into construction aggregate elements
Data Source
AI summary
The present invention relates to a manufacturing method of construction aggregates using incineration ash, in which aggregates for construction, such as gravel or sand are manufactured using incineration ashes produced during the incineration process of household waste, food waste, sewage waste, construction and industrial waste, etc. while realizing eco-friendly manufacturing environments, reducing costs through successive steps and reducing and discharging harmful gases produced during firing.