Loop Slurry Reactor Cooling Layout for Simpler Coolant Circuits
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Solution Overview
Problem
Large loop slurry reactors require complex coolant circuits with large pipes, leading to inefficient cooling configurations and temperature control challenges, especially in large-scale polyolefin manufacturing plants.
Innovation Solution
A simplified coolant distribution system with a single supply and return header on opposite sides of the loop slurry reactor, combined with a series-connected heat exchanger and steam heater for temperature control, reducing pipe length and pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If previously used cooling techniques are applied to large loop slurry reactors, then cooling capacity is sufficient, but pipe size increases and configuration becomes overly complex
Solution Approach 1:
The cooling system is segmented into multiple cooling zones, each with its own supply and return headers positioned at different locations around the reactor. This allows the large reactor to be cooled in distributed sections rather than requiring a single complex circuit, reducing overall system complexity while maintaining adequate cooling capacity for each zone
Solution Approach 2:
The patent introduces a multi-dimensional coolant circulation approach by positioning supply and return headers at opposite sides of the reactor and creating multiple coolant passes that flow through different spatial paths. This dimensional arrangement simplifies the configuration by organizing cooling flow in a structured pattern around the reactor perimeter rather than using complex internal piping
2Device complexity
If coolant circuit is simplified with fewer headers, then device complexity is reduced, but temperature control precision deteriorates
Solution Approach 1:
Each cooling zone is equipped with localized supply and return headers that provide dedicated temperature control for specific reactor sections. This local quality approach ensures that temperature can be precisely controlled in each zone independently, maintaining overall temperature control precision while using multiple simple modular units rather than one complex system
Solution Approach 2:
Temperature sensors are positioned in each cooling zone to provide feedback on the thermal conditions. This feedback mechanism allows the system to maintain precise temperature control in each zone by adjusting coolant flow as needed, achieving accurate temperature monitoring and control with a simplified distributed header configuration
3Length of stationary object
If pipe length is reduced in coolant circuit, then pressure drop decreases, but cooling coverage may be insufficient
Solution Approach 1:
The cooling system is divided into multiple segments with supply and return headers positioned at different locations around the reactor. This segmentation reduces the length of individual pipe runs in each cooling pass while ensuring comprehensive cooling coverage through distributed zones, as each segment covers a specific reactor section rather than requiring one long pipe throughout
Solution Approach 2:
The patent arranges cooling passes in a multi-dimensional pattern around the reactor perimeter, with supply headers on one side and return headers on the opposite side. This spatial arrangement creates multiple parallel cooling paths that reduce individual pipe lengths while collectively providing complete cooling coverage of the entire reactor surface
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 system provides efficient coolant distribution and temperature control, simplifying the cooling process and reducing complexity, suitable for both large and small-scale reactors.
Implementation Method 1
cooling jackets are placed around vertical legs of the loop slurry reactor, and a coolant flows through the cooling jackets during polymerization so as to remove the heat of reaction
Implementation Method 2
A continuous flow of coolant is supplied to the cooling jackets to absorb reaction heat and then is cooled by the heat exchanger in a coolant circuit
Implementation Method 3
cooling the warmed coolant in the heat exchanger to form a cooled coolant
Implementation Method 4
passing the cooled coolant through a steam heater to form the temperature adjusted coolant
Data Source
AI summary
Disclosed are systems and processes for distributing reactor coolant flow to the cooling jackets of a loop slurry reactor, where the reactor coolant is used to control the temperature of the loop slurry reactor in olefin polymerization. Also disclosed are systems and processes for controlling the temperature of the reactor coolant that is used for cooling olefin polymerization reactors, which can be used in combination with traditional coolant distribution regimes and in combination with the coolant distribution systems and processes that are disclosed herein.