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Diagnosing and Correcting Local Temperature Imbalances in Boilers for Optimal Efficiency and Low Emissions.
Temperature imbalances are present in every boiler, especially in combustions with difficult fuels. They become relevant when CO peaks occur, despite sufficiently high (average) O2 content. The combination of local O2 deficiency and local temperature peaks may lead to many problems. Thus, the local temperature distribution diagnosis and correction is the key for an operation with high efficiency, high reliability, and low emissions.
The information about the two-dimensional temperature distribution at the furnace exit is available by the acoustic gas temperature measurement, which helps plant operators balance and optimize their combustion process.
AGAM System Utilizes Temperature-Dependent Sound Velocity
AGAM system from Bonnenberg & Drescher GmbH (B&D) works on the principle that the velocity of sound is dependent on the temperature of the gas. The speed of sound is measured using a sound signal, which is travelling from a transmitter to a receiver by determining the time of flight for the given signal using correlation techniques and using the known distance between the two points. By determining the speed of sound between a transmitter and a receiver (measuring path), the temperature in the boiler can be calculated.
Transmitters and receivers are combined in so-called transceivers. Typically, 8 to 16 of these transceivers are installed on one boiler for high temperature resolution applications. Using the network of temperature measurements through the boiler allows the calculation of 2D temperature profiles within the measurement plane by applying tomographic algorithms.
The number of paths is unrestricted, which allows a high local resolution of the measurement. The 2D temperature profile allows the determination of small changes in the fuel/air ration, e.g. by trimming individual mills or burners. The bi-directional measurement in both directions of each path allows precise results under all boiler conditions, even with flue gas velocity gradients parallel to the measurement plane.
Get Your Advanced Temperature Measurement System with Contactless, Precise & Self-Cleaning Features
Experience unmatched temperature measurement accuracy and efficiency with our advanced system that offers 2D temperature distribution with high resolution, precise measurement capability in adverse conditions, contactless and self-cleaning feature, low wear and maintenance, fast 2D measurement near real-time, platform-independent browser access, modern and modular software architecture, robust integrated hardware, and decentralized digitization possibility.
2D temperature distribution with highest resolution
Precise from 20 to 2000 °C – even under the most adverse conditions
Contactless, self-cleaning and drift-free
Fast 2D measurement near real time
Platform-independent in the browser
Software with modern and modular architecture
Robust integrated hardware
Decentralized digitization possible
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