Oxygen-Free Fuel Powder Drying Unit to Prevent Oxidation
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Solution Overview
Problem
Existing drying technologies are inefficient and costly, failing to effectively reduce moisture content in organic fuels and ores to a dry base, leading to low combustion efficiency and high emissions, while old technologies result in moisture regain when exposed to air, rendering drying processes ineffective.
Innovation Solution
A drying unit that carbonizes organic fuels in a flue gas environment with 5% oxygen content, using a PLC-controlled system to quickly and economically lower moisture from 55% to 1% in 6 minutes, integrating a reactor to maintain 5% oxygen and 900°C flue gas for efficient drying, and utilizing a modular design for easy relocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fuel powders are dried using conventional methods (spray drying, fluidized bed drying, roller drying), then drying efficiency is improved, but fuel quality deteriorates due to oxidation, sintering, and aggregation
Solution Approach 1:
The patent applies inert atmosphere principle by conducting the drying process in a nitrogen atmosphere. The nitrogen gas flows through the drying chamber to displace oxygen, preventing oxidation of the fuel powder during drying. This maintains fuel quality while achieving efficient drying through controlled environmental conditions.
2Speed
If high temperatures are applied to evaporate water quickly, then drying speed is improved, but fuel properties deteriorate due to sintering and aggregation
Solution Approach 1:
The patent applies parameter changes by carefully controlling the temperature within the range of 50-150°C. This optimized temperature range enables sufficient drying speed while preventing sintering and aggregation of fuel particles. The nitrogen atmosphere further stabilizes the fuel properties during this thermal process.
3Adaptability or versatility
If oxygen is present during drying to maintain combustion conditions, then fuel usability is improved, but harmful oxidation reactions occur during storage
Solution Approach 1:
The patent applies inert atmosphere principle by using nitrogen to displace oxygen during the drying process. This prevents oxidation reactions that would otherwise occur when oxygen is present, while still achieving effective drying. The fuel maintains its combustion usability after drying because the inert atmosphere only protects during storage, not during actual combustion use.
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 system achieves 50% moisture reduction from 1 ton of coal, increasing combustion efficiency from 70-80% to 95-97%, reducing transport and operating costs, and enabling high-calorie coal production with 27% energy savings and 50% more transport capacity.
Implementation Method 1
drying fuels in powder form by carbonization in oxygen-free environment
Implementation Method 2
evaporate water and organic solvents
Implementation Method 3
heating the fuel in a drying unit to a temperature sufficient for evaporation of water and organic solvents
Data Source
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AI summary
The invention is a drying unit (100) that enables the drying of coal and all kinds of organic materials in powder form containing moisture by carbonizing them in an oxygen-free environment, wherein it comprises; a dryer outer body (101) having an inner volume of the furnace (1012), into which the hot air generated by the said reactor (200) is transferred, a crusher rotor (140), structured inside the said moving dryer outer body (101), having cutters and angled pallets inside, that prevents the adhesion of organic matters, ores and substances in powder form and ensures their advancement by its rotating motion, at least one suction fan (118) that absorbs the hot air in the said furnace interior volume (1012).