Organic Solvent Recovery System Dehydration Control
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Solution Overview
Problem
In organic solvent recovery systems, the recovered solvent may retain moisture when the dehydration device is stopped, leading to insufficient dehydration upon restart and volatilization of the organic solvent through pipe outlets, resulting in a decrease in recovery efficiency.
Innovation Solution
The system includes a recovery device with adsorbent treatment tanks that alternate between adsorption and desorption stages, a dehydration device with a speed adjustment mechanism to manage solvent return, and a return device that ensures solvent is returned to the separator when the dehydration device is stopped, preventing prolonged retention and volatilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dehydration device is stopped and the loading amount of organic solvent is less than designed amount, then the system operates at reduced capacity, but the recovered solvent is continuously retained in the dehydration treatment tank for a long time causing water to return to the recovered solvent due to desorption from the dehydration material
Solution Approach 1:
The invention introduces a return flow path that automatically returns recovered solvent from the dehydration treatment tank to the separator when the dehydration device is stopped or operating at reduced capacity. This preliminary action prevents the solvent from being retained in the tank for extended periods, thereby preventing water desorption from the dehydration material and ensuring dehydration quality is maintained even when the system restarts or operates at variable loads.
2Duration of action of stationary object
If the recovered solvent is continuously retained in the dehydration treatment tank for a long time, then the system maintains continuous operation, but the organic solvent contained in the dehydration treatment tank is volatilized through the pipe outlet resulting in decrease in recovery amount
Solution Approach 1:
The return flow path provides a preliminary mechanism to discharge and return recovered solvent when retention time exceeds necessary limits. This prevents prolonged retention that would lead to volatilization losses through the pipe outlet, thereby maintaining high recovery amounts while allowing the system to operate continuously or at variable capacities.
3Ease of operation
If the dehydration device is restarted after being stopped, then the system resumes operation, but water returns to the recovered solvent due to desorption from the dehydration material resulting in insufficient dehydration
Solution Approach 1:
The return flow path acts as a preliminary corrective measure that automatically discharges retained solvent before restart issues manifest. By returning the solvent to the separator for reprocessing, the system ensures that dehydration quality is restored to proper levels before normal operation resumes, eliminating the water desorption problem that would otherwise occur upon restart.
4Adaptability or versatility
If the loading amount of organic solvent is less than the designed amount, then the system adapts to lower load conditions, but the recovered solvent remains in the dehydration treatment tank causing both water desorption and solvent volatilization
Solution Approach 1:
The return flow path introduces a dynamic response mechanism that automatically activates when the loading amount is less than the designed amount. The system dynamically adjusts by returning retained solvent to the separator, preventing both water desorption and solvent volatilization that would occur under prolonged retention conditions. This maintains dehydration quality and recovery efficiency across varying load conditions.
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 configuration ensures that the solvent is sufficiently dehydrated even upon system restart, and minimizes volatilization of the organic solvent, thereby maintaining the recovery efficiency of the organic solvent.
Implementation Method 1
an adsorbent that adsorbs an organic solvent by coming into contact with a treated gas containing the organic solvent
Implementation Method 2
desorbs the organic solvent by coming into contact with water vapor
Implementation Method 3
a condenser that cools and condenses the desorbed gas
Implementation Method 4
a separator that separates the desorbed liquid into a layer of separated water and a layer of the recovered solvent
Implementation Method 5
a dehydration material that adsorbs moisture contained in the recovered solvent by coming into contact with the recovered solvent
Data Source
AI summary
Provided is an organic solvent recovery system including a recovery device, a dehydration device, and a return device, in which the dehydration device includes: a dehydration material that adsorbs moisture contained in a recovered solvent by coming into contact with the recovered solvent; one or more dehydration treatment tanks in which the dehydration material is stored; and a discharge mechanism that supplies the recovered solvent separated by a separator to the dehydration treatment tanks, and discharges, from the dehydration treatment tanks, a dehydrated solvent dehydrated from the recovered solvent by the dehydration material, and the return device sends the recovered solvent into a layer of the recovered solvent in the separator when returning the recovered solvent in the dehydration treatment tanks to the separator.