Polyolefin Particle Drying VOC Reduction
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Solution Overview
Problem
Conventional drying methods for polyolefin-containing particles do not effectively remove harmful volatile organic compounds, leading to incomplete deaeration and potential particle adhesion issues during the drying process.
Innovation Solution
A method for drying polyolefin-containing particles involves a controlled drying process using a specific formula that considers the limiting viscosity, content of insoluble components, temperature, and drying time, ensuring effective reduction of volatile organic compounds and preventing particle adhesion, by using a drying gas in a drying container with optimized conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional drying methods are used to remove volatile organic compounds from polyolefin particles, then some VOC removal is achieved, but the drying is insufficient and particles may adhere to each other
Solution Approach 1:
The invention changes the drying parameters by controlling temperature within 50-150°C and maintaining specific humidity levels throughout the drying process. This controlled parameter approach enables effective VOC removal while preventing particle adhesion, resolving the contradiction between thorough drying and particle stability.
Solution Approach 2:
The drying process is conducted in multiple stages with different temperature and humidity conditions. The periodic adjustment of drying conditions allows progressive VOC removal while maintaining particle separation, addressing both the harmful factor reduction and reliability concerns.
2Object-affected harmful factors
If drying temperature and time are increased to remove more VOC, then VOC content is reduced, but particle adhesion increases
Solution Approach 1:
The invention optimizes the relationship between temperature, humidity, and time parameters. By maintaining temperature at 50-150°C with controlled humidity levels, the process achieves effective VOC removal without causing particle adhesion, resolving the contradiction between VOC reduction and particle shape maintenance.
Solution Approach 2:
The drying process dynamically adjusts temperature and humidity conditions based on the drying stage. This dynamic control enables thorough VOC removal while preventing particle adhesion, addressing both the harmful factor reduction and shape preservation requirements.
3Shape
If drying is performed insufficiently to prevent particle adhesion, then particle separation is maintained, but VOC content remains high
Solution Approach 1:
The multi-stage drying process with periodic adjustment of temperature and humidity conditions enables progressive VOC removal. This periodic action achieves thorough drying while maintaining particle separation, resolving the contradiction between shape maintenance and harmful factor reduction.
Solution Approach 2:
The invention implements controlled changes in temperature and humidity parameters throughout the drying process. This parameter control achieves effective VOC removal while preventing particle adhesion, addressing both the harmful factor reduction and shape preservation requirements.
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 stably dries polyolefin-containing particles while significantly reducing the content of harmful volatile organic compounds and preventing particle adhesion, ensuring efficient and reliable processing.
Implementation Method 1
drying the polyolefin-containing particles in the drying container, wherein a numerical value obtained by the following formula (a) is 441 or more and 600 or less: 38.0×[η]CXIS−0.500×CXIS content+1.20×particle temperature during drying+3.29×drying time
Implementation Method 2
supplying a drying gas to the drying container, and drying the polyolefin-containing particles in the drying container
Data Source
Figure 1
AI summary
The amount of a harmful volatile organic compound is reduced. A method for drying polyolefin-containing particles comprises a drying step of supplying polyolefin-containing particles to a drying container, supplying a drying gas to the drying container, and drying the polyolefin-containing particles in the drying container. In the drying step, a numerical value determined by the following formula (a) is 441 or more and 600 or less. 38.0×ηCXISdL/g−0.500×CXIScontent%bymass+1.20×particletemperatureduringdryingK+3.29×dryingtimehr