Catalyst Feed System Vertical Gravity Transport
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Solution Overview
Problem
Existing polymerization catalyst feeding systems often experience plugging issues due to the length and complexity of piping, leading to inefficiencies and increased strain on pumps, especially during transitions between catalysts.
Innovation Solution
A process where a catalyst slurry is formed with oil and a solid catalyst component, transferred vertically from a preparation vessel to a feed vessel located above the polymerization reactor, allowing for continuous feeding and reducing piping complexity and pump strain, using food-grade white oil as the diluent to maintain a stable viscosity and prevent settling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the catalyst feed vessel is placed far from the polymerization reactor, then there is more space for installation, but the piping becomes longer and more complex causing plugging issues
Solution Approach 1:
The catalyst feed vessel is positioned vertically above the polymerization reactor, utilizing the vertical dimension to achieve proximity without horizontal space constraints. This vertical arrangement shortens the feed line length and eliminates complex horizontal piping routing, allowing the system to be installed in compact footprints while maintaining simple, direct catalyst delivery paths.
2Ease of manufacture
If the catalyst feed line is long and complex, then installation flexibility is improved, but plugging occurs due to length and complexity
Solution Approach 1:
By positioning the feed vessel vertically above the reactor, the system achieves short, direct vertical feed lines rather than long horizontal runs. This dimensional change eliminates bending points and complex routing that cause plugging, ensuring reliable catalyst delivery while maintaining installation flexibility through compact vertical integration.
3Ease of manufacture
If pumps are used to transfer catalyst slurry over long distances, then installation flexibility is improved, but pump strain increases during catalyst switching
Solution Approach 1:
The vertical positioning of the feed vessel above the reactor enables gravity-assisted catalyst delivery, dramatically reducing the power required by pumps. Catalyst slurry flows downward through short vertical lines under its own weight, eliminating the need for high-power pumps to overcome long horizontal pipe friction and elevation changes, thus reducing energy consumption and pump strain during switching operations.
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 prevents plugging, reduces catalyst transportation costs, and allows for more accurate and reliable feeding, enabling higher slurry concentrations and lower oil usage, while ensuring the catalyst's integrity and safety.
Implementation Method 1
the first catalyst feed vessel is located above the polymerization reactor... gravitational force supports the transport from the feed vessel to the injection point
Data Source
AI summary
The present invention relates to a process for feeding a polymerization catalyst into a polymerization reactor, said process comprising the steps of: (i) forming a catalyst slurry comprising oil and a solid catalyst component in a first catalyst preparation vessel; (ii) transferring the catalyst slurry from the first catalyst preparation vessel to a first catalyst feed vessel; (iii) maintaining the catalyst slurry in the first catalyst feed vessel in a homogeneous state; (iv) withdrawing a portion of the catalyst slurry from the first catalyst feed vessel, preferably continuously withdrawing the catalyst slurry from the first catalyst feed vessel, and introducing the withdrawn portion of the catalyst slurry into a polymerization reactor; wherein the oil has a dynamic viscosity of from 25 to 1500 mPa*s at the conditions within the first catalyst preparation vessel and the first catalyst feed vessel, wherein the catalyst slurry is transferred along a substantially vertical path downwards from the first catalyst feed vessel to the reactor.