Anti-thermosensitization Rectification Tower with Falling-film Reboiler
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Solution Overview
Problem
Traditional rectification processes for separating thermosensitive natural substances often result in thermosensitization reactions such as polymerization, dehydration, oxidation, and decomposition due to high temperature and long-time heating, leading to product damage and resource wastage.
Innovation Solution
An anti-thermosensitization rectification tower design featuring a T-shaped condenser, circular baffle plate, annular sump, and falling-film reboiler with a high-speed circulation system, which minimizes retention time and prevents direct recirculation of condensed liquid back into the rectification tower, thereby reducing thermosensitization reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional rectification processes are used to separate natural substances, then the separation function is achieved, but thermosensitization reactions occur due to high temperature and long-time heating
Solution Approach 1:
The patent implements a falling-film reboiler design where liquid flows rapidly down heated surfaces as a thin film, dramatically reducing the residence time of thermosensitive substances in the heating zone. This allows the separation process to complete quickly, achieving the required separation quality while minimizing exposure to temperatures that cause thermosensitization reactions such as polymerization, dehydration, oxidation and decomposition.
Solution Approach 2:
The patent changes key process parameters by transitioning from traditional batch or continuous rectification with long heating periods to a high-speed circulation system with residence times reduced to seconds. The falling-film reboiler enables rapid heating and vaporization, fundamentally altering the temperature-time profile to prevent thermosensitization while maintaining separation effectiveness.
2Manufacturing precision
If long-time heating is applied in traditional rectification, then complete separation of components is achieved, but product quality deteriorates due to decomposition and coloration
Solution Approach 1:
The high-speed circulation system forces liquid through the heating zone extremely quickly, completing the vaporization and separation process in seconds rather than hours. This rapid processing achieves complete separation of components while the brief exposure time prevents decomposition, coloration and other quality-deteriorating effects.
Solution Approach 2:
The patent employs a continuous circulation system where liquid is constantly pumped through the falling-film reboiler, flash evaporator, and condenser without interruption. This continuous action maintains efficient mass transfer and heat transfer throughout the process, achieving complete separation while minimizing residence time at elevated temperatures to preserve product quality.
3Device complexity
If conventional rectification towers are used, then the separation process is simple, but thermosensitization reactions cause resource wastage
Solution Approach 1:
The falling-film reboiler and high-speed circulation system create a rapid processing pathway that moves material through the thermally aggressive zones quickly. This design maintains relative process simplicity while preventing the thermosensitization reactions that lead to substance degradation and resource wastage.
Solution Approach 2:
The patent fundamentally changes the time parameter of the process, reducing residence time in heating zones from hours to seconds. This parameter change prevents thermosensitization reactions and substance degradation while maintaining an economically viable process configuration.
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 design effectively prevents thermosensitization reactions, maintaining product quality and intrinsic properties by significantly shortening the retention time of substances in the hot zone and ensuring quick evaporation, resulting in higher recovery rates and purer products compared to traditional methods.
Implementation Method 1
heating and evaporation; the gas generated therein emits up through the rectification tower
Implementation Method 2
the falling-film reboiler is in the form of a stout shell-and-tube heat exchanger
Implementation Method 3
the gas generated therein emits up through the rectification tower 25 into the condenser 26, wherein it is condensed into liquid
Implementation Method 4
a centrifugal pump is utilized to connect together the tower bottom and the falling-film reboiler and thereby to form a high-speed circulation system
Data Source
AI summary
An anti-thermosensitization rectification tower comprising a rectification tower, a T-shaped condenser, a baffle plate, a tower bottom, a falling-film reboiler and a recirculation system, wherein the T-shaped condenser is secured exactly on the top of the rectification tower without any pipeline in between, and the circular baffle plate is installed in the T-shaped condenser; an annular sump located between the rectification tower and the T-shaped condenser for collecting the liquid condensed in the T-shaped condenser and channeling it out of the rectification tower into a liquid-collecting tank, and a centrifugal pump utilized to connect together the tower bottom and the falling-film reboiler to form a high-speed circulation system, wherein the tower bottom is an elongated conduit and the falling-film reboiler is in the form of a stout shell-and-tube heat exchanger is provided.