Vacuum Membrane Separator for High-Concentration Maple Sap
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Solution Overview
Problem
Existing methods for concentrating maple sap, such as membrane filtration and pan evaporation, face limitations in achieving high sugar content and require significant energy, with membrane clogging issues and equipment complexity.
Innovation Solution
A process and system utilizing a vacuum separator with membranes to evaporate water from maple sap, increasing sugar concentration by circulating sap in a liquid state and sustaining a gaseous state on the other side of the membrane, followed by condensation, allowing for higher sugar concentrations without clogging and simplifying equipment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If membrane filtration is used to concentrate maple sap, then energy consumption is reduced, but sugar content achievable is limited due to membrane clogging
Solution Approach 1:
The patent changes the operating parameters of membrane filtration by reducing pressure and temperature as sugar content increases. Specifically, the pressure is reduced from initial higher values to below atmospheric pressure, and temperature is reduced to below ambient temperature, which prevents membrane clogging and enables achievement of sugar contents above 60 Brix while maintaining energy efficiency
Solution Approach 2:
The patent combines membrane filtration with freezing in a single integrated system. The membrane module serves dual functions: filtration at higher temperatures and freezing at lower temperatures. This multi-functional approach allows the system to achieve both energy efficiency and high sugar content concentration above 60 Brix
2Quantity of substance
If traditional pan evaporation is used to concentrate maple sap, then high sugar content can be achieved, but energy consumption increases significantly
Solution Approach 1:
The patent replaces the thermal evaporation process with a membrane-based separation process. Instead of using heat to evaporate water from maple sap in pan evaporators, the system uses membrane filtration to separate water from concentrated sap, dramatically reducing energy consumption while achieving the same sugar concentration levels
3Productivity
If pressure is increased to improve membrane filtration efficiency, then water extraction increases, but membrane clogging occurs at higher sugar contents
Solution Approach 1:
The patent employs dynamic adjustment of operating parameters throughout the concentration process. Pressure is dynamically reduced from initial higher values to below atmospheric pressure as concentration progresses, and temperature is dynamically reduced to below ambient temperature. This dynamic adaptation maintains high water extraction efficiency while preventing membrane clogging at high sugar contents
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 effectively increases sugar concentration of maple sap from 25 or 30 Brix to above 50 Brix, reducing energy consumption and simplifying the concentration process by avoiding membrane clogging and reducing the need for complex equipment stages.
Implementation Method 1
sustaining a gaseous state at a pressure below atmospheric pressure on a second side of the membrane
Implementation Method 2
evaporating water from the maple sap across the membrane, thereby increasing the sugar concentration of the maple sap
Implementation Method 3
condensing the extracted water
Data Source
AI summary
The process of producing concentrated maple sap can include concentrating the maple sap using membrane filtration to a sugar content of approximately 30° Brix, circulating the maple through a maple sap passage of a membrane, wherein the membrane contains the maple sap in a vacuum cavity, and evaporating the water from the maple sap across the membrane into the cavity. The concentrated maple sap having a sugar content above 50° Brix.