Rotating Stripping Device for Polymerization Reactor Wall Deposits
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Solution Overview
Problem
Conventional methods for producing high-temperature polyamides face challenges with deposit formation on reactor walls during water separation, leading to deteriorated product quality and process inefficiencies.
Innovation Solution
A method involving a reaction chamber with a rotating removal device and specific outlet configurations for continuous polymer synthesis, where a prepolymer melt is polymerized and a gaseous substance is separated, effectively removing deposits from the reactor walls and maintaining process continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a prepolymer melt is polymerized at high temperature in a reactor to separate water and achieve high molecular weight, then the desired polymer properties are obtained, but deposits form on the inner walls of the reactor leading to deteriorated product quality
Solution Approach 1:
The harmful deposits are extracted from the reaction system by introducing a gas stream that selectively removes the deposited material from the reactor walls, separating the harmful byproduct from the main polymerization process
Solution Approach 2:
A gas stream is introduced as an intermediary substance that mediates between the polymer melt and reactor walls, preventing direct contact and deposit formation while allowing the polymerization to proceed
2Reliability
If water separation is performed during polycondensation to increase molecular weight, then the desired polymer properties are achieved, but the process requires complex temperature and pressure control leading to process inefficiencies
Solution Approach 1:
The process utilizes parameter changes by allowing the system to naturally transition through temperature and pressure changes during polymerization, using the evolving physical state of the reaction mixture to drive water separation without requiring complex external control mechanisms
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 method ensures continuous polymer synthesis with improved product quality by preventing deposit formation on reactor walls, enhancing the efficiency and reliability of high-temperature polyamide production.
Implementation Method 1
a removal device (5), which is arranged such that it can rotate about the longitudinal axis of the cylinder
Implementation Method 2
polymerisation of the prepolymer melt (6) to form a polymer melt (7)
Implementation Method 3
separating a gaseous substance (8) in a device... removing a gaseous substance (8) from the reaction space (1)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device for the synthesis of a polymer with extraction of a gaseous substance (8) comprising a reaction chamber (1) that comprises a substantially circular-cylindrical upper section (11), which is delimited by two circular faces (111, 112) and a lateral face (113) and has a cylinder longitudinal axis, and a lower section (12), an inlet opening (2), which is arranged in a circular face or the lateral face of the upper section (11), a first outlet opening (3), which is arranged in a wall of the lower section (12), a second outlet opening (4), which is arranged in the lateral face of the upper section (11) and lies opposite the first outlet opening (3), and a stripping apparatus (5), which is arranged such that the stripping apparatus (5) can rotate about the cylinder longitudinal axis and touches both circular faces and the lateral face. Said device can be used in particular for carrying out a method that comprises feeding an oligomer melt (6) into a reaction chamber (1) through an inlet opening (2), polymerising the oligomer melt (6) to form a polymer melt (7), removing the polymer melt (7) from the reaction chamber (1) through a first outlet opening (3) of the reaction chamber, and removing a gaseous substance (8) from the reaction chamber (1) through a second outlet opening (4) of the reaction chamber (1), wherein deposits on at least one inner wall of the reaction chamber (1) are removed by a stripping apparatus (5) and transported into the oligomer melt (6).