High-Pressure Polymerization Leak Detection via Pressure Monitoring
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Solution Overview
Problem
High-pressure polymerization plants face challenges in detecting leaks quickly and reliably, which can lead to the buildup of explosive hydrocarbon gas/oxygen mixtures and increased operational safety risks due to the high pressures and temperatures involved in ethylene polymerization.
Innovation Solution
A process that continuously monitors the pressure within the polymerization reactor using pressure sensors and a controller to adjust the pressure control valve, initiating an emergency shutdown program if the pressure drops below a threshold, including activation of a deluge system to mitigate potential leaks and prevent explosive mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure polymerization is carried out at temperatures from 100°C to 350°C and pressures from 110 MPa to 500 MPa, then polymerization efficiency is improved, but operational safety deteriorates due to risk of explosive decomposition
Solution Approach 1:
The patent implements preliminary safety actions by continuously monitoring pressure and temperature parameters before dangerous conditions develop. The control system is pre-programmed with safety thresholds and automatically initiates shutdown procedures when parameters approach dangerous levels, preventing explosive decomposition before it occurs.
Solution Approach 2:
The patent employs continuous feedback monitoring of pressure and temperature parameters during polymerization. The control system receives real-time data from sensors and automatically adjusts operational parameters or initiates shutdown procedures when safety thresholds are approached, maintaining a safe operating window while maximizing polymerization efficiency.
2Reliability
If pressure monitoring and emergency shutdown systems are implemented, then operational safety is improved, but device complexity increases
Solution Approach 1:
The control system is programmed with pre-defined safety logic and automatically monitors parameters, compares them against safety thresholds, and initiates shutdown procedures without human intervention. The system serves itself by having built-in safety capabilities that automatically activate when needed, reducing the need for additional complex safety infrastructure.
3Loss of time
If continuous pressure monitoring is implemented with automatic shutdown, then leak detection speed is improved, but loss of production increases due to frequent shutdowns
Solution Approach 1:
The system uses continuous feedback monitoring to detect pressure changes indicating leaks in real-time. When a leak is detected, the system automatically initiates shutdown procedures to prevent dangerous conditions. The continuous monitoring ensures leaks are detected immediately, minimizing the time plants are at risk while maintaining production continuity through rapid response.
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
Enables fast detection and prevention of leaks in high-pressure polymerization plants, ensuring operational safety by rapidly shutting down the plant and preventing the formation of explosive hydrocarbon gas/oxygen mixtures, making the process reliable and easily implementable in existing plants.
Implementation Method 1
continuously monitoring the pressure within the polymerization reactor by one or more pressure sensors creating a pressure signal indicative of the pressure within the polymerization reactor
Implementation Method 2
activation of a deluge system to mitigate potential leaks and prevent explosive mixtures
Data Source
Figure 1
AI summary
A process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out at temperatures from 100 °C to 350 °C and pressures in the range of from 110 MPa to 500 MPa in a continuously operated polymerization reactor which is controlled by a pressure control valve at the outlet of the polymerization reactor, the process comprising continuously monitoring the pressure within the polymerization reactor, feeding a pressure signal to a controller for controlling the control valve and having the controller altering the opening of the pressure control valve to control the pressure within the polymerization reactor, wherein the controller starts an emergency shutdown program when the pressure control valve closes more than a preset threshold value and the pressure within the polymerization reactor decreases below a preset pressure threshold.