Compressed Gas Dryer Flow Reducer for Desiccant Protection
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Solution Overview
Problem
Existing adsorption dryers using shuttle valves or diverter valves face issues with incomplete desiccant regeneration, pressure drop, and damage from high flows, leading to inefficient moisture removal and reduced dryer lifespan.
Innovation Solution
A dryer design with two adsorption vessels connected in parallel, featuring control valves and a flow reducer to manage gas flow, ensuring proper regeneration and protection of desiccant material across varying flow conditions, and incorporating one-way valves and nozzles for efficient gas management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a shuttle valve is used to direct compressed gas flow between two adsorption vessels, then the system can automatically switch between adsorption and regeneration phases, but the desiccant material is not completely regenerated and may become saturated under certain flow conditions
Solution Approach 1:
A flow reducer is introduced as an intermediary component between the compressed gas source and the adsorption vessels. This flow reducer mediates the gas flow to ensure proper regeneration by controlling the flow rate through the desiccant material, preventing saturation and ensuring complete regeneration while maintaining automatic phase switching capability.
2Stress or pressure
If a shuttle valve with large diameter is used to overcome pressure drop in high capacity vessels, then the pressure drop is reduced, but the valve design becomes significantly more complex and difficult to implement
Solution Approach 1:
The flow reducer serves as an intermediary that manages pressure and flow characteristics without requiring the shuttle valve itself to be of large diameter. By placing the flow reducer upstream, the system achieves acceptable pressure drop performance while maintaining a compact, implementable valve design.
Solution Approach 2:
The flow reducer modifies the flow parameters (velocity, pressure) of the compressed gas before it enters the adsorption vessels. This parameter change allows the system to handle high capacity requirements without needing an oversized shuttle valve, thus reducing device complexity while managing pressure drop.
3Ease of operation
If a shuttle valve with ball mechanism is used to block flow conduits, then the valve can direct gas flow between vessels, but at very high flows the ball cannot overcome the flow forces and compressed air reaches both vessels simultaneously, damaging the desiccant material
Solution Approach 1:
The flow reducer is positioned upstream to preliminarily control and reduce the flow velocity and kinetic energy of the compressed gas before it reaches the shuttle valve. This preliminary action ensures that the ball mechanism can effectively block the flow conduit even at high flow rates, preventing simultaneous flow to both vessels and protecting the desiccant material from damage.
Solution Approach 2:
The flow reducer acts as an intermediary that tames the compressed gas flow before it reaches the shuttle valve mechanism. By reducing the flow velocity and pressure, it enables the shuttle valve to function properly without being overwhelmed by high flow forces, thus preventing desiccant material damage.
4Ease of operation
If diverter valve is used to select flow path through adsorption vessels, then the system can direct compressed gas flow, but at high flows the desiccant beads collide with each other due to friction, damaging and destroying the desiccant material
Solution Approach 1:
The flow reducer is placed upstream to preliminarily reduce the velocity and kinetic energy of the compressed gas before it enters the adsorption vessels. This preliminary reduction in flow energy prevents the desiccant beads from colliding with each other due to excessive friction and impact forces, thereby protecting the desiccant material from damage while still allowing effective flow path direction.
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 ensures efficient regeneration of desiccant material, reduces pressure drop, and extends dryer lifespan by preventing desiccant damage and maintaining high-quality dry air output across different flow rates.
Implementation Method 1
a desiccant material provided therein
Implementation Method 2
adapting the pressure drop within the adsorption vessel subjected to a regeneration phase
Implementation Method 3
a depressurization unit connectable to the inlet flow conduit of each of said first and second adsorption vessels
Data Source
AI summary
The present invention is directed to a dryer provided with an inlet for receiving a flow of compressed gas and an outlet for providing dry air, said dryer comprising: a first and a second adsorption vessel connected in parallel, a depressurization unit connectable to the inlet flow conduit of each of said first and second adsorption vessels;whereby the dryer further comprises a flow reducer connectable to the inlet flow conduit of each of the first and second adsorption vessels and whereby said control valves are adapted to be switched in a first state, and a second state.