IGCC Syngas Calorific Value Measurement With Redundant Dual Analysis

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Solution Overview

Problem

Existing IGCC fuel component measurement methods, particularly for syngas, are inefficient and unreliable, leading to unstable operation due to long analysis times, instrument failures, and lack of redundancy, which affects the accuracy and stability of calorific value regulation.

Innovation Solution

A dual-sampling system with infrared and chromatographic instruments, combined with syngas pretreatment and multi-channel calorific value calculation, ensures redundancy and accuracy by comparing measured and calculated values, and includes safety features like carbon monoxide detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If chromatography method is used to measure combustible gas components, then measurement accuracy is improved, but analysis time is extended and productivity deteriorates

Engineering Contradiction:

Improvecombustible gas component measurement accuracyVSAvoidanalysis speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent segments the measurement system into two independent parallel channels: one using chromatography for high-precision measurement and another using infrared detection for rapid measurement. This allows the system to leverage the strengths of both methods without compromising either accuracy or speed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the measurement parameter approach by using two different measurement principles (chromatographic separation vs. infrared absorption) to measure the same gas components. This enables the system to obtain both accurate and rapid measurements simultaneously through parameter diversification.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If single instrument measurement is used, then device complexity is reduced, but reliability deteriorates due to lack of redundancy

Engineering Contradiction:

Improvemeasurement system structureVSAvoidmeasurement system reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements beforehand cushioning by preparing a standby chromatographic instrument that can immediately take over if the primary instrument fails. This preventive measure ensures continuous operation and maintains reliability without significantly increasing system complexity.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent creates a copy of the measurement system with redundant instruments (second infrared instrument and standby chromatographic instrument) that can replace failed components. This copying approach enhances reliability while keeping the system structure manageable through standardized configurations.

Inventive Principle:

Principle #26Copying

3Productivity

If simple calorific value calculation is used, then calculation speed is improved, but measurement precision deteriorates due to lack of reference comparison

Engineering Contradiction:

Improvecalculation speedVSAvoidcalorific value accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent implements feedback by continuously comparing calorific values calculated from different measurement methods (chromatography-based and infrared-based). This comparison provides feedback on measurement accuracy and allows the system to identify and correct deviations, thereby improving precision while maintaining calculation speed through automated processing.

Inventive Principle:

Principle #23Feedback

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

Enhances the reliability and stability of calorific value control by providing redundant measurement, rapid response to instrument failures, and accurate fuel component analysis, ensuring stable operation of gas turbines.

Implementation Method 1

The infrared instrument measures the fuel component values

Methodology Applied

Scientific EffectInfrared absorption: Absorption (EM radiation)

Implementation Method 2

Dehydrate the wet syngas through the constant temperature condensing unit to remove water in the wet syngas

Methodology Applied

Scientific EffectCondensation: Condensation

Data Source

PatentUS12631583B2IGCC fuel component analysis and calorific value measurement system

Publication Date: 2026.05.19 HUANENG (TIANJIN) COAL GASIFICATION POWER GENERATION CO LTD

AI summary

An IGCC fuel component analysis and calorific value measurement system, the fuel components can be effectively measured by an infrared instrument and a chromatographic instrument; the multiplex redundant measurement is combined, two syngas is sampled by two sampling devices, two groups of measuring instruments are arranged, the multi-channel calculation of calorific value improves the reliability of calorific value control, and the measurement and process problems are effectively found by calorific value comparison, guaranteeing the effective output of calculated values in the fault state of the instrument, improving the calculation accuracy of calorific value, accurately analyzing the fuel components and calculating the fuel calorific value, and ensuring the stability of the calorific value regulation system and the stable operation of gas turbine; the multi-directional, diversified and multi-security instrument and the introduction of comparison between measured and calculated calorific values can effectively monitor the change of calorific value and the equipment status.