Multi-Stage Sludge Dryer Sealing and Gas Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drying installations for wet solid materials face inefficiencies in energy usage, complex humidity regulation, operator dependency, fire safety concerns, and clogging issues due to leaks and high humidity, leading to unsatisfactory drying outcomes.
Innovation Solution
A multi-stage drying installation with a hot and dry gas production unit, aeraulic communication between stages, and a moving floor with slats for gas distribution and material advancement, along with a control system for regulation and safety features like fire detection and automatic extinguishing, to enhance drying efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hot and dry gas is circulated through the dryer to dry wet materials, then drying efficiency is improved, but energy loss occurs due to gas leaks through the dryer and conveyors
Solution Approach 1:
The patent employs sealing elements and flexible sealing structures at the interfaces between dryer stages and along conveyor paths to prevent hot gas leaks while maintaining the flexibility needed for material movement and thermal expansion
Solution Approach 2:
The invention extracts and removes leaked hot and dry gas from the dryer system using extraction devices positioned at strategic locations, preventing energy loss and maintaining drying efficiency
2Manufacturing precision
If permanent monitoring of humidity using specific humidity sensors is implemented, then drying regulation is improved, but operating cost increases due to expensive and unreliable sensors requiring operator presence
Solution Approach 1:
The patent implements self-regulating drying stages with automatic control mechanisms that monitor and adjust drying parameters without requiring expensive humidity sensors or continuous operator intervention, reducing operating costs while maintaining precision
Solution Approach 2:
The invention incorporates feedback mechanisms through the sequential drying stage design where the output of one stage becomes the input for the next, enabling automatic regulation of the drying process based on material moisture content changes
3Productivity
If multiple superposed drying stages are used to dry wet materials, then drying efficiency is improved, but warm and humid gas rises from lower to upper stages causing energy loss
Solution Approach 1:
The patent uses sealing elements and barriers between drying stages to prevent the upward movement of warm and humid gas from lower to upper stages, maintaining thermal efficiency while enabling multi-stage drying
Solution Approach 2:
The invention divides the drying system into separate, sealed stages with independent gas circulation, allowing each stage to maintain its own thermal environment and preventing energy loss through gas mixing between stages
4Ease of operation
If the dryer operates autonomously without operator presence, then operating cost is reduced, but fire safety risk increases due to potential ignition of product
Solution Approach 1:
The patent incorporates autonomous fire detection and suppression systems that automatically monitor for ignition risks and respond without operator intervention, enabling safe autonomous operation while reducing operating costs
Solution Approach 2:
The invention implements preliminary fire prevention measures through controlled gas circulation and temperature management that prevent ignition conditions before they can occur, along with automatic suppression systems ready to activate immediately upon detecting fire hazards
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 solution improves drying efficiency by minimizing gas leaks, automates the drying process, reduces energy consumption, and ensures fire safety, allowing for precise humidity control and reduced operational costs while maintaining high-quality drying results.
Implementation Method 1
a unit for producing hot and dry gas... which makes it possible to heat the gas, thanks to a source of heat
Implementation Method 2
a pressurization system for the hot and dry gas ensuring the circulation of a hot and dry gas
Implementation Method 3
The lukewarm and humid gas compartment... for the transit of a lukewarm and humid gas, after passing through the humid materials
Implementation Method 4
said slats being provided with orifices for the distribution of hot and dry gas in the hot and dry gas box towards the materials wet
Implementation Method 5
said extraction system comprising at least one vacuum suction system and a plurality of evacuation ducts
Implementation Method 6
a fire detection system, and/or an automatic fire extinguishing system
Data Source
Figure 1A
Figure 1B~1D
Figure 2
AI summary
The invention relates to a wet solids drying installation comprising a hot, dry gas production unit (1) and a dryer (2). The hot, dry gas production unit (1) includes an external gas inlet and a hot, dry gas pressurization system (11) ensuring the circulation of hot, dry gas produced in the hot, dry gas production unit (1) to the dryer (2). The dryer (2) comprises at least two superimposed wet material drying stages, an upper stage (21) and a lower stage (22), each stage comprising a hot, dry gas chamber (24), a moving floor (25), and a warm, humid gas compartment (26).