Adsorption Dryer Regeneration Control via Dew Point Feedback
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Solution Overview
Problem
Existing adsorption dryers face challenges in optimizing energy consumption during regeneration, as existing methods do not consider the current state of the adsorbent material, leading to inefficient energy use and increased energy costs.
Innovation Solution
A method that regulates the regeneration time of adsorption dryers by measuring pressure dew point or relative humidity and outlet temperature, adjusting the regeneration cycle duration based on these measurements to ensure optimal conditions and minimize energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adsorbent material is periodically regenerated by heating a regeneration gas, then the adsorption dryer is maintained in optimum parameters, but the energy consumption increases
Solution Approach 1:
The patent implements a control method that measures the pressure dew point or relative humidity after adsorption and uses this feedback to regulate the regeneration time. The system adjusts the regeneration cycle duration based on actual measured values compared to threshold values, ensuring optimum parameters are maintained while minimizing energy consumption by avoiding unnecessary extended regeneration cycles
Solution Approach 2:
The patent applies dynamic regulation of the regeneration process by adjusting the regeneration time interval based on measured conditions. The control method dynamically modifies the regeneration cycle duration according to the actual state of the adsorbent material, transitioning from static fixed-time regeneration to adaptive dynamic regulation that optimizes energy usage while maintaining performance
2Reliability
If the regeneration cycle is extended to ensure complete regeneration, then the adsorbent material is fully regenerated, but the energy consumption and time loss increase
Solution Approach 1:
The control method uses feedback from pressure dew point or relative humidity measurements to determine when regeneration is complete. By comparing measured values against threshold values, the system accurately identifies the point at which regeneration objectives are achieved, preventing unnecessary extension of the regeneration cycle and reducing time loss while ensuring complete regeneration
3Use of energy by moving object
If the regeneration cycle is shortened to reduce energy consumption, then the energy usage decreases, but the adsorbent material may not be fully regenerated
Solution Approach 1:
The system uses feedback control by measuring pressure dew point or relative humidity and comparing it to threshold values to determine the optimal termination point for regeneration. This ensures the regeneration cycle is extended only as long as necessary to achieve complete regeneration, preventing both under-regeneration and excessive energy consumption
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 approach allows for efficient regeneration with reduced energy consumption, adapting to the actual state of the adsorption dryer and environmental conditions, resulting in lower energy usage over time.
Implementation Method 1
heating a regeneration gas prior to directing it through the dryer inlet
Implementation Method 2
moisture is adsorbed from the process gas
Data Source
AI summary
A method for regulating the regeneration time of an adsorption dryer, the method including the steps of: subjecting the adsorption dryer to an adsorption cycle; stopping the adsorption cycle after a preset adsorption time interval; and subsequently subjecting the adsorption dryer to a first regeneration cycle during a preset time interval. The method further includes maintaining the first regeneration cycle for an additional regeneration time interval if the measured pressure dew point or relative humidity is higher than a predetermined pressure dew point or relative humidity threshold; and/or stopping the first regeneration cycle if the outlet temperature is higher than or equal to a predetermined temperature threshold, and, if the time frame in which the adsorption dryer is subjected to the first regeneration cycle is greater than a minimum heat regeneration time interval.