Reactor Runaway Monitoring With Modular Temperature-Pressure Prediction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing early detection methods for exothermic reactions in reactors are limited by the transition to safety-related programmable logic controllers, which restrict mathematical blocks and programming languages, making it difficult to effectively monitor and prevent runaway reactions.
Innovation Solution
A project engineering system and method that utilizes modular functional modules for ascertaining maximum temperature and pressure in reactors, incorporating measurement values and substance data, allowing implementation in safety-related programmable logic controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional online model-based early detection methods are used, then temperature and pressure monitoring is achieved, but the time between detection and occurrence of runaway reaction is only a brief period, limiting countermeasure effectiveness
Solution Approach 1:
The patent performs preliminary calculations of maximum temperature and pressure that would occur in the event of a runaway reaction, based on current reactor conditions and substance data. This allows the system to predict hazardous scenarios before they actually occur, providing advance warning time for preventive action rather than just detecting after temperature/pressure changes begin.
Solution Approach 2:
The monitoring system is divided into separate functional modules: one for ascertaining substance data, another for calculating maximum temperature/pressure, and a third for comparing with threshold values. This modular approach enables independent optimization of each function and facilitates implementation in safety-related programmable logic controllers with limited mathematical capabilities.
2Measurement precision
If complex mathematical models are used for accurate runaway reaction prediction, then monitoring precision is improved, but implementation in safety-related programmable logic controllers becomes difficult due to restrictions on mathematical blocks and programming languages
Solution Approach 1:
The complex monitoring task is segmented into multiple simple functional modules that can be independently implemented in safety-related programmable logic controllers. Each module performs a specific function (substance data ascertainment, maximum temperature calculation, maximum pressure calculation, threshold comparison) that can be achieved with basic mathematical operations available in industrial controllers.
Solution Approach 2:
The system changes the approach from continuous complex mathematical modeling to periodic calculation of maximum temperature and pressure based on discrete substance data parameters. This allows accurate prediction using simplified calculations that compare calculated maximum values against predetermined threshold values, rather than requiring continuous complex differential equations.
3Measurement precision
If direct concentration measurements with optical methods or IR spectroscopy are used, then accumulation detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
Instead of directly measuring concentration with complex optical equipment, the patent uses temperature and pressure measurements as intermediary parameters to infer accumulation. By monitoring these easily measurable physical quantities and using them to calculate maximum temperature and pressure values, the system indirectly detects accumulation without requiring direct concentration measurement equipment.
Solution Approach 2:
The patent replaces complex optical measurement systems (IR spectroscopy, optical methods) with simpler thermal and pressure sensing systems. The mechanical/thermal approach of measuring temperature and pressure changes provides sufficient information to detect accumulation and predict runaway reactions without requiring sophisticated optical instrumentation.
Data Source
AI summary
A project planning system for creating a program for monitoring exothermal reactions in a reactor, wherein in order to create the program the project planning system provides at least one first functional module with a mathematical module for determining a maximum temperature and/or a maximum pressure in the reactor in the case of a continuous reaction, based on measured values and based on material data of components in the reactor, preferably by determining concentrations of components in the reactor, and at least one second functional module for determining the material data, in particular a heat capacity, density, vapor pressure, conductivity, solubility and/or viscosity of one or more components in the reactor, where the program is suitable, in particular, for implementation in a safety-oriented, memory-programmable controller.