Fuel Gas Composition Analysis via Heating Value and Density

The patent replaces the mechanical gas chromatography system with a combination of thermal conductivity detection (TCD) and infrared detection (IR). The TCD measures density-related properties while the IR detector measures heating value, and the composition is calculated from these measurements. This substitution eliminates the long detection time of gas chromatography while maintaining measurement accuracy through complementary detection methods.

The patent changes the measurement parameters from direct inert gas concentration detection to measuring density and heating value, then calculating composition from these parameters. By measuring physical properties (density via TCD, heating value via IR) rather than directly detecting gas composition, the system achieves rapid measurement without sacrificing accuracy, as these physical parameters can be measured simultaneously and instantly.

The patent replaces the slow gas chromatography mechanical system with a rapid detection system using thermal conductivity and infrared sensors. These sensors provide instantaneous readings of density and heating value, enabling the system to respond immediately to composition changes while maintaining accurate measurement through the complementary nature of the two detection methods.

The patent implements continuous measurement by simultaneously operating the TCD and IR detectors, allowing uninterrupted monitoring of fuel gas composition. This continuous action enables real-time detection of inert gas concentration changes, eliminating the intermittent nature of gas chromatography and ensuring the control system always has current composition data for immediate response.

The patent replaces gas chromatography with a rapid dual-detection system that simultaneously measures density (TCD) and heating value (IR). This substitution provides the high-speed composition analysis needed for real-time fuel flow control, enabling the system to maintain combustion stability even when inert gas concentration changes rapidly, as the control system receives immediate composition data.

The patent implements a feedback control system where the rapidly measured composition data (density and heating value) is immediately used to adjust fuel flow rate. The TCD and IR detectors provide continuous feedback on gas composition, allowing the control system to dynamically respond to maintain optimal combustion conditions and stability, something impossible with the slow gas chromatography method.