Multi-level Tubular Reactor Tray for Polyester Mixing
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Solution Overview
Problem
Conventional melt-phase polyester production facilities, such as those for polyethylene terephthalate (PET), face high capital, operational, and maintenance costs due to the use of mechanically agitated reactors like CSTRs, which are complex and require extensive maintenance.
Innovation Solution
A multi-level tubular reactor system is employed, featuring horizontally elongated reactor segments with trays that divide the interior into upper and lower chambers, allowing for fluid communication between them, reducing the need for mechanical agitation and minimizing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanically agitated reactors (CSTRs) are used for melt-phase polyester production, then product quality can be maintained, but capital, operational, and maintenance costs increase due to complex mechanical agitators and control equipment
Solution Approach 1:
The patent replaces the mechanical agitation system with a flow-driven mixing mechanism. The reaction medium is circulated through the reactor multiple times per unit time, creating turbulent flow patterns that eliminate the need for mechanical agitators. This substitution maintains product quality while eliminating complex mechanical components and their associated costs.
Solution Approach 2:
The invention employs a pump-driven circulation system that moves the reaction medium through the reactor. The hydraulic flow creates the necessary mixing action without mechanical agitation. The pump and flow path design ensure adequate mixing and heat transfer while avoiding complex mechanical agitators.
2Ease of operation
If mechanically agitated reactors are used, then adequate mixing can be achieved, but maintenance costs increase due to extensive maintenance requirements
Solution Approach 1:
By replacing mechanical agitators with a pump-driven flow circulation system, the patent eliminates the maintenance burden associated with mechanical components. The pump and flow paths have fewer moving parts and no mechanical wear, significantly reducing maintenance requirements while maintaining effective mixing.
Solution Approach 2:
The reaction medium itself provides the mixing action through repeated circulation and turbulent flow. The system uses its own flow dynamics to achieve mixing without requiring external mechanical intervention, making the system self-sustaining and low-maintenance.
3Device complexity
If conventional reactor configurations are used, then the process can be simplified, but productivity and efficiency are reduced
Solution Approach 1:
The patent implements dynamic flow patterns where the reaction medium is circulated multiple times through the reactor. This dynamic circulation creates turbulent mixing and enhances heat and mass transfer, significantly improving reaction efficiency and productivity while maintaining a relatively simple reactor configuration.
Solution Approach 2:
The pump-driven circulation system ensures continuous movement and mixing of the reaction medium throughout the reactor. This continuous flow prevents stagnant zones, maintains optimal reaction conditions, and enhances overall productivity without requiring complex batch processing systems.
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 enhances the efficiency of the polyester production process by reducing mechanical agitation, lowering costs, and maintaining product quality, while allowing for effective chemical reactions and foam formation within the reactor.
Implementation Method 1
a horizontally elongated reactor segment through which the reaction medium flows as the reaction medium travels through the reactor
Implementation Method 2
a tray disposed substantially within the tubular member and extending along at least one-half the length of the tubular member, dividing the interior into upper and lower chambers
Implementation Method 3
At least a portion of the reaction medium flows in one direction on the tray and in an opposite direction on the bottom of the tubular member
Data Source
Figure 1
Figure 1a~1c
Figure 2
AI summary
A multi-level tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The tubular reactor can include a horizontally elongated reactor segment containing a tray that divides the internal volume of the reactor segment into upper and lower chambers. The reaction medium can flow through the upper and lower in generally opposite directions.