Vacuum Evaporation System for Molasses Dehydration
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Solution Overview
Problem
Existing systems for removing water vapor from molasses and other high sugar substances are inefficient due to reliance on open flame gas fired heat sources and lack of vacuum capability, which limits productivity and structural integrity.
Innovation Solution
A system utilizing steam as a heat source combined with internal vacuum pressure to facilitate continuous flow vacuum evaporation, incorporating a jacketed heat exchanger and close clearance vacuum isolation device to maintain structural integrity and vacuum pressure during product flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If steam heat transfer system is used, then productivity is improved, but device complexity increases due to code-compliant vessel construction requirements
Solution Approach 1:
The patent implements a double-walled vessel configuration where an inner vessel is nested within an outer vessel. The annular space between these walls contains steam for heat transfer, while the inner vessel maintains vacuum. This nested structure enables both steam heating and vacuum operation simultaneously, resolving the contradiction between improved productivity and reduced complexity.
Solution Approach 2:
The annular space between the double walls serves as an intermediary medium that carries steam from the external environment to the internal vacuum chamber. This intermediary steam layer enables heat transfer without direct contact between steam and the vacuum-protected interior, allowing the system to achieve both efficient heating and maintained vacuum with appropriate structural design.
2Productivity
If vacuum pressure is applied to remove water vapor, then moisture removal efficiency is improved, but structural integrity risks worsen due to external atmospheric pressure
Solution Approach 1:
The nested double-walled structure provides mechanical reinforcement to the vacuum chamber. The outer vessel withstands external atmospheric pressure while the inner vessel maintains the vacuum environment. This nested configuration distributes mechanical stresses and prevents collapse, enabling vacuum operation without compromising structural integrity.
Solution Approach 2:
The robust double-walled construction and reinforced sealing mechanisms are designed beforehand to cushion against the 14.7 psi external atmospheric pressure that would otherwise collapse the vacuum chamber. This pre-engineered structural reinforcement ensures safety and integrity during vacuum operation.
3Device complexity
If open flame gas fired heat source is used, then system simplicity is maintained, but productivity deteriorates due to inferior heat transfer efficiency
Solution Approach 1:
The system utilizes the phase transition of steam condensing in the annular space to transfer latent heat to the molasses inside the inner vessel. This phase change mechanism provides highly efficient heat transfer compared to open flame convection, dramatically improving water vapor removal productivity while maintaining a relatively compact and manageable system structure.
Solution Approach 2:
The patent replaces the mechanical/open flame heating system with a steam-based thermal system. Instead of direct flame contact, steam is introduced into the annular space where it condenses and transfers heat indirectly to the process material. This substitution maintains system feasibility while achieving superior heat transfer efficiency and productivity.
4Strength
If vacuum vessel is designed to withstand external pressure, then structural integrity is improved, but ease of manufacture worsens due to specialized construction requirements
Solution Approach 1:
The double-walled nested structure allows each vessel to be manufactured separately with standard thicknesses, avoiding the need for extremely thin but ultra-strong single-walled vacuum chambers. The outer vessel provides structural support while the inner vessel creates the vacuum seal, making the overall system easier to manufacture using conventional fabrication techniques.
Solution Approach 2:
The vacuum-containing function is segmented into a separate inner vessel that can be manufactured independently, rather than requiring the entire outer structure to be optimized for vacuum containment. This segmentation allows each component to be fabricated using appropriate methods for its specific function, improving overall ease of manufacture.
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 system effectively reduces moisture content from 40% to less than 5% in molasses, enhancing productivity and maintaining structural integrity while allowing continuous flow and efficient water vapor removal.
Implementation Method 1
The steam system transfers its latent heat to the lower temperature component. The steam will condense on the outside of an internal pipe in a jacketed system as long as the medium within the internal pipe is at a lower temperature than the steam.
Implementation Method 2
The steam will condense on the outside of an internal pipe in a jacketed system
Implementation Method 3
the use of a vacuum to pull moisture from molasses and other high sugar substances becomes quite advantageous
Data Source
AI summary
A system composed of heating and vacuum elements for the purpose of removing water vapor from molasses or other high sugar concentrate substances. Alternatively, the system could be used to remove water vapor from any substance where water removal is desired. Typically, the system starts with a molasses or high sugar concentrate with a moisture content of up to 40 percent. After processing, the system produces a high sugar concentrate with a moisture content of less than 5 percent. The system uses a continuous flow vacuum evaporated process. In an alternative embodiment, a method of operating the system is also disclosed.