Gasifier Optical Sensor for Continuous Slag Monitoring
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Solution Overview
Problem
IGCC power plants face costly and subjective manual inspections to determine slag blockages in gasifiers, leading to downtime, as current methods rely on operator experience and require shutting down the gasifier for manual inspection.
Innovation Solution
An optical sensor system mounted on the gasifier allows for continuous monitoring and control by acquiring image data of the interior, analyzing conditions such as slag buildup and refractory wear, and adjusting fuel and oxygen flow to prevent blockages without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspection is performed to determine slag blockages, then the gasifier can be inspected for conditions, but the gasifier must be shut down resulting in costly downtime
Solution Approach 1:
The patent replaces manual mechanical inspection with an optical sensing system that uses light to detect slag blockages and other conditions inside the gasifier. The optical sensor captures images of the gasifier interior, allowing operators to inspect conditions remotely without shutting down the equipment, thereby eliminating downtime while maintaining inspection accuracy.
2Reliability
If manual inspection is performed by operators, then conditions can be assessed, but the results are subjective based on operator experience
Solution Approach 1:
The patent replaces subjective human visual inspection with an optical sensor system that captures images and allows for objective analysis. The system can detect conditions such as slag blockages, refractory wear, and other anomalies through optical imaging, providing consistent and measurable data that is not influenced by individual operator experience or subjectivity.
3Ease of operation
If the feed injector is removed for manual inspection, then the gasifier interior can be accessed, but the inspection process becomes complex and time-consuming
Solution Approach 1:
The patent uses an optical sensor that can be positioned to view the gasifier interior through existing openings or ports, eliminating the need to remove the feed injector. This simplifies the inspection procedure significantly, as the sensor can capture images of the gasifier throat and interior conditions without requiring disassembly of components, thereby improving ease of operation while reducing procedural complexity.
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 solution reduces downtime, increases gasifier performance, and extends its lifespan by providing objective and repeatable monitoring and control of internal conditions, eliminating the need for manual inspections and relying on operator experience.
Implementation Method 1
an optical sensor coupled to the port, and a monitoring system coupled to the optical sensor, wherein the monitoring system is configured to acquire data from the optical sensor
Data Source
AI summary
A system, including a gasifier comprising a wall defining a chamber, an inlet, an outlet, and a port, a combination feed injector coupled to the inlet, wherein the combination feed injector is configured to inject a first fuel and air or oxygen into the chamber to preheat the gasifier, and the combination feed injector is configured to inject a second fuel and oxygen into the gasifier after preheating to gasify the second fuel, an optical device coupled to the port, a sensor coupled to the optical device, and a monitoring system coupled to the sensor, wherein the monitoring system is configured to acquire data from the sensor, process the data, and provide an output representative of a condition of the gasifier based on the data.