Gas Phase Oxidation Pressure Control for Concentration Measurement
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Solution Overview
Problem
Existing methods for online concentration measurement in gas-phase partial oxidation processes are inaccurate, leading to unsafe operation and economic inefficiencies due to fluctuations in pressure and temperature, which restrict the usable composition range and result in costly safety margins and reduced reaction rates.
Innovation Solution
A method that stabilizes the measurement pressure in the analysis device by using a pressure control device to regulate the gas flow, minimizing the influence of fluctuations in the gas flow and discharge atmosphere, and also maintains constant temperature to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure and temperature fluctuations are not compensated during online concentration measurement, then the measurement system is simpler and more economical, but measurement accuracy deteriorates leading to unsafe operation
Solution Approach 1:
The patent introduces an intermediary compensation mechanism that accounts for pressure and temperature fluctuations without requiring complex real-time control of these parameters. The measurement system uses reference measurements and calculation-based compensation to eliminate the direct impact of environmental variations, thereby maintaining accuracy while avoiding the need for elaborate pressure and temperature control systems.
2Reliability
If safety margins are increased to prevent explosive compositions, then operational safety is improved, but economic efficiency deteriorates due to reduced reaction rates and unnecessary safety measures
Solution Approach 1:
The patent implements a feedback-based measurement and control system that continuously monitors gas composition and provides real-time data on concentrations of organic compounds, oxygen, and other components. This accurate feedback enables precise control of the feed gas mixture to maintain safe composition ranges while operating at optimal reaction rates, eliminating the need for excessive safety margins that would otherwise reduce productivity.
3Measurement precision
If pressure control devices are used to stabilize measurement pressure, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
Rather than directly controlling pressure to improve measurement accuracy, the patent introduces an intermediary computational approach that measures pressure and temperature fluctuations and compensates for their effects through calculation. This method maintains measurement accuracy while avoiding the complexity and cost of pressure control devices, as the compensation is achieved through data processing rather than physical control.
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 significantly reduces measurement errors, allowing for safer and more economically viable operation by maintaining accurate concentration measurements within the ignitable composition range, thereby enhancing reaction rates and reducing unnecessary safety measures.
Implementation Method 1
the online measurement of the concentration of one or more selected components in the feed gas mixture stream itself, in one or more of the feed gas mixture stream-producing output streams and/or in the product gas mixture stream is prevented
Implementation Method 2
A method that stabilizes the measurement pressure in the analysis device by using a pressure control device to regulate the gas flow
Implementation Method 3
maintains constant temperature to improve measurement accuracy
Data Source
AI summary
The invention relates to a method for safely carrying out a continuous, heterogeneously catalyzed gas phase partial oxidation of an organic compound in a reactor, the composition of the feedstock mixture being controlled by the pressure-regulated determination of concentration of relevant components.