Continuous Polymerization Reactor for Super Absorbent Polymers
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Solution Overview
Problem
Batch polymerization reactors for super absorbent polymers face challenges in productivity and property reproducibility due to long reaction times and the need for multiple reactors, which also results in space and quality management issues.
Innovation Solution
A continuous polymerization reactor system that allows simultaneous introduction and discharge of the monomer composition, utilizing a cylindrical body with a decreasing diameter discharge part and controlled valves to maintain a predetermined flow rate, optimizing the height-to-diameter ratio for uniform polymer properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If batch polymerization reactors are used to produce super absorbent polymer, then the polymerization reaction can be completed, but it takes a substantial amount of time and productivity is low
Solution Approach 1:
The patent implements continuous polymerization where monomer composition is continuously introduced through inlet and hydrogel polymer is continuously discharged through outlet, eliminating the batch processing cycle. This continuous operation maintains constant reaction conditions and eliminates idle time between batches, significantly improving productivity while reducing total reaction time
Solution Approach 2:
The reactor design pre-establishes optimal flow rates and residence times before polymerization begins. The monomer composition flows at a predetermined flow rate that ensures complete polymerization within the reactor, and the discharge valve is pre-configured to maintain consistent output conditions, eliminating the need for time-consuming batch adjustments
2Productivity
If multiple batch polymerization reactors are used to increase output, then productivity improves, but a larger space is required and property difference is generated between hydrogels obtained in each reactor
Solution Approach 1:
The patent merges multiple batch reactor operations into a single continuous reactor system. Instead of operating several batch reactors that require separate installations and occupy large cumulative space, one continuous reactor performs the function of multiple batch reactors simultaneously, reducing the total installation space while maintaining high output
Solution Approach 2:
The continuous reactor design creates a universal system that can produce hydrogel polymer with consistent properties at high volume. The standardized continuous process eliminates the variability between different batch reactors, making the system universally capable of producing uniform high-quality product without requiring multiple specialized reactor units
3Productivity
If multiple batch polymerization reactors are used to increase output, then productivity improves, but property difference is generated between hydrogels obtained in each reactor
Solution Approach 1:
The continuous polymerization process maintains constant reaction conditions including temperature, pressure, and flow rates throughout operation. This continuity eliminates the batch-to-batch variations that occur in discontinuous processes, ensuring consistent polymer properties and high manufacturing precision across all production output
Solution Approach 2:
The discharge valve is controlled to maintain a predetermined flow rate of hydrogel polymer discharge. This controlled discharge creates a feedback mechanism that ensures consistent residence time and reaction conditions, resulting in uniform polymer properties with high reproducibility across all produced material
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 enhances productivity, eliminates the need for multiple reactors, ensures uniform super absorbent polymer properties, and simplifies quality management by enabling continuous operation with improved centrifuge retention capacity and reduced extractable contents.
Implementation Method 1
a polymerization reaction in a polymerization reactor, so as to obtain hydrogel or hydrogel polymer
Data Source
AI summary
A continuous polymerization reactor for super absorbent polymer is disclosed. The continuous polymerization reactor includes a cylindrical body; a discharge part with a diameter decreasing downward, positioned at a lower part of the body; an inlet positioned at an upper part of and connected to the body, into which a monomer composition is introduced; an outlet positioned at a lower part of the discharge part, from which hydrogel polymer is discharged; and a discharge valve opening or closing the outlet, wherein a ratio (H1/D1) of a sum (H1) of a height of the body and a height of the discharge part to a diameter (D1) of the body is 2 to 4. In addition, a continuous polymerization reaction system comprising the continuous polymerization reactor is also disclosed.