Solid Material Circulation Monitoring for Sintering Detection
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Solution Overview
Problem
Circulating fluidized bed reactors face challenges with particle agglomeration and sintering, leading to unscheduled shutdowns due to fluctuating fuel quality, which conventional methods struggle to detect early enough for preventive action.
Innovation Solution
A method and control system that utilize a multivariate model to monitor solid material circulation by analyzing performance indicators such as pressure and temperature differences, allowing early detection of anomalies like bed quality and sintering risks, and implementing remedial actions like adjusting fuel mixtures or increasing make-up material to prevent blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional monitoring methods are used to track solid material circulation, then the system structure remains simple, but the ability to detect sintering and agglomeration early is insufficient leading to unscheduled shutdowns
Solution Approach 1:
The monitoring system segments the solid material circulation process into distinct measurement zones (reactor, separator, return path) and applies specific sensors to each segment. This allows targeted detection of agglomeration and sintering at critical locations without requiring a complete system overhaul, thereby improving reliability while controlling complexity.
Solution Approach 2:
The patent introduces intermediate measurement devices (pressure sensors, temperature sensors, differential pressure gauges) that act as mediators between the solid material circulation process and the control system. These intermediaries convert physical parameters into detectable signals, enabling early detection of anomalies without direct intervention in the circulation process.
2Measurement precision
If basic operative routines are followed to monitor fuel quality, then operational procedures remain simple, but sintering cannot be recognized early enough for preventive action
Solution Approach 1:
The patent replaces basic manual operative routines with automated sensor-based measurement systems. Pressure sensors, temperature sensors, and differential pressure gauges automatically monitor circulation parameters and detect sintering conditions, providing precise measurement without requiring complex manual inspection procedures.
Solution Approach 2:
The monitoring system establishes feedback loops where sensor measurements are continuously compared against baseline values, and alerts are generated when deviations indicate sintering or agglomeration. This automated feedback mechanism improves detection accuracy while keeping the operational interface simple through clear warning signals.
3Reliability
If no advanced monitoring is implemented, then the system operates with minimal complexity, but particle agglomeration leads to blockages and shutdowns
Solution Approach 1:
The monitoring system performs preliminary detection of agglomeration and sintering conditions before they develop into complete blockages. By measuring pressure differences and temperature variations in the return path and separator, the system identifies early signs of circulation problems, allowing preventive action before reliability is compromised.
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
The method effectively foresees potential issues, reducing unscheduled shutdowns and operational costs by enabling timely preventive measures, thereby improving reactor availability and maintaining stable operation.
Implementation Method 1
selecting a process variable of the process of circulating of solid material in the return path, and selecting performance indicators of the process of circulation of solid material: amongst the selected process variables for each performance indicator of the process of circulation of solid material
Implementation Method 2
creating a multivariate model for each performance indicator, using history data of the process variables and the performance indicators of the process of circulation of solid material
Implementation Method 3
the process of circulation of solid material comprises arranging solid material to be entrained by gas flow in the reaction chamber, and to entrain further from the reaction chamber to the at least one solid material separator
Implementation Method 4
comparing the modelled value of each performance indicator to a respective measured value of each performance indicator and to inspect a presence of an anomaly between the modelled value and the measured value
Data Source
AI summary
A method of monitoring circulation of solid material in a circulating fluidized bed reactor including a reaction chamber, at least one solid material separator, and a return path between the separator and the chamber. The method includes selecting process variables of the process of circulating of solid material in the return path, and selecting performance indicators of the process of circulation of solid material amongst the selected process variables for each performance indicator of the process of circulation of material, creating a multivariate model for each performance indicator, using history data of the process variables and the performance indicators, determining a modelled value of the performance indicators, by applying current measured values of the process variables to the multivariate model, and comparing the modelled value of each performance indicator to a respective measured value and inspecting a presence of an anomaly between the modelled value and the respective measured value.