Slurry Catalyst Flow Splitter for Uniform Distribution
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Solution Overview
Problem
Existing systems face challenges in uniformly delivering a slurry catalyst composition to multiple injection points in polymerization reactors, particularly at low flow rates, due to plugging issues and the need for precise control of flow rates between points.
Innovation Solution
A system comprising a primary slurry feed system and secondary slurry feed systems, with flow meters, carrier liquids, and control devices, allows for the measurement and control of slurry catalyst composition flow rates, carrier liquid flow rates, and carrier gas flow rates to achieve uniform distribution and precise control of the slurry catalyst composition across multiple injection points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the slurry catalyst composition flow rate is reduced to meet low activity catalyst requirements, then catalyst activity control is improved, but the risk of plugging in measurement and control equipment increases
Solution Approach 1:
The single injection system is segmented into multiple injection points (primary and secondary), allowing the total catalyst flow to be divided into smaller sub-flows. This reduces the flow rate through each individual injection device, preventing plugging while maintaining the required low overall catalyst activity.
Solution Approach 2:
A flow splitter is introduced as an intermediary device between the slurry catalyst source and the injection points. This mediator evenly distributes the slurry flow to multiple outlets, ensuring each receives an adequate reduced flow rate without plugging, while the control valve regulates the total flow to achieve the desired catalyst activity.
2Stability of the object's composition
If the slurry catalyst composition is distributed to multiple injection points, then catalyst distribution in the reactor is improved, but the precision of flow rate control at each point deteriorates
Solution Approach 1:
The catalyst distribution system is segmented into multiple independent injection points, each with its own flow control capability. This allows precise control of flow rates to each individual point while maintaining uniform overall distribution across the reactor.
Solution Approach 2:
Flow meters are installed at each injection point to provide feedback on actual flow rates. This enables precise measurement and control of the flow distribution, ensuring uniform catalyst delivery to all injection points while allowing for adjustments to maintain precision.
3Reliability
If the flow rate of slurry catalyst composition is kept low, then catalyst activity is controlled, but the uniformity of flow distribution to multiple injection points deteriorates
Solution Approach 1:
The flow splitter acts as a mediator that receives the low flow rate slurry catalyst composition and evenly distributes it to multiple injection points. This intermediary device ensures uniform flow distribution despite the low total flow rate, preventing uneven catalyst delivery while maintaining controlled catalyst activity.
Data Source
AI summary
A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.