Polyolefin Particle Drying and Storage Discharge Control
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Solution Overview
Problem
Conventional methods for drying and storing polyolefin-containing particles often result in unintentional retention of particles within containers, leading to clogging and incomplete discharge, which affects the efficiency and stability of the process.
Innovation Solution
A method involving a drying step and a storing step, where specific conditions are met to ensure complete discharge by controlling parameters such as apparatus diameter, bed height, residence time, temperature, inclination angle, and CXS component content, as defined by formulas (a) and (b), to prevent particle retention and ensure stable discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drying and storing methods are used, then the process is simple, but particles unintentionally remain in containers causing clogging and incomplete discharge
Solution Approach 1:
The invention changes multiple process parameters simultaneously: increasing bed height to at least 2 meters, controlling residence time between 1-48 hours, maintaining temperature at 0-160°C, and adjusting inclination angle to 30-60 degrees. These parameter modifications ensure particles are completely discharged while preventing container clogging, resolving the reliability issue without requiring fundamentally new equipment.
Solution Approach 2:
The invention performs preliminary actions during the drying and storing processes by maintaining specific conditions (bed height, residence time, temperature, inclination angle) from the beginning to ensure particles are fully discharged. This preventive approach stops clogging before it occurs, improving reliability without adding complex control systems.
2Productivity
If particles are retained in containers during drying and storing, then container utilization is high, but discharge becomes incomplete and clogging occurs
Solution Approach 1:
The invention introduces dynamic elements by controlling the inclination angle (30-60 degrees) and residence time (1-48 hours) to create controlled particle movement. This dynamic approach ensures particles flow continuously through the discharge port while maintaining stable storage conditions, improving both discharge efficiency and stability.
Solution Approach 2:
By modifying key parameters including bed height (≥2m), residence time (1-48h), temperature (0-160°C), and inclination angle (30-60°), the invention optimizes particle discharge behavior. These parameter changes prevent particle accumulation at discharge ports while maintaining high container utilization, resolving the contradiction between productivity and reliability.
3Manufacturing precision
If drying and storing containers are designed with standard dimensions, then manufacturing is easy, but particles cannot be completely discharged
Solution Approach 1:
The invention specifies precise parameter ranges for container design: bed height of at least 2 meters, inclination angle of 30-60 degrees, and residence time of 1-48 hours. These parameter modifications ensure complete particle discharge while maintaining standard manufacturing processes. The inclined surface design with controlled angles remains easy to manufacture using conventional techniques.
Solution Approach 2:
The invention segments the container into functional zones with specific dimensional requirements, particularly the inclined discharge section and the storage section. This segmentation allows standard manufacturing techniques to be used while achieving complete discharge, as each segment is designed with optimized dimensions that prevent particle accumulation.
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 method effectively prevents particle retention in containers, ensuring complete and stable discharge of polyolefin-containing particles, thereby improving the efficiency of the drying and storing processes and preventing clogging.
Implementation Method 1
drying the polyolefin-containing particles in the drying container
Implementation Method 2
deaerate the polyolefin particles
Implementation Method 3
an inclined surface of the drying container and an installation horizontal surface
Data Source
AI summary
A method for drying polyolefin-containing particles includes a drying step of supplying polyolefin-containing particles to a drying container and drying the polyolefin-containing particles in the drying container. In the drying step, a value determined by the following formula (a) is −0.20 or more and 1.05 or less.0.00304×apparatus diameter [m]+0.00261×bed height [m]+0.0179×residence time [hr]+0.00213×particle temperature in drying container [K]−0.0109×inclination angle [degree]+0.0212×CXS component amount [% by mass] Formula (a):