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- Published: Wednesday, 05 March 2014 09:52
BHB REQUALIFIED AGAM system in urban waste incinerator
BHB, in partnership with Bonnenberg+Drescher, performed the requalification of the acoustic pyrometers system (AGAM) responsible for temperature measuring in the three CTSRU boilers.
BHB, responsible for implementing this system in 2006, was invited by Valorsul, S.A. to perform the requalification of the existing Acoustic GAs Measuring (AGAM) system in partnership with its representative Bonnenberg+Drescher.
Valorsul, S.A. is the company responsible for the treatment and recovery of about 950 tons of municipal waste produced per year in 19 municipalities of Greater Lisbon and the Portuguese Western Region.
The AGAM system is a non-intrusive method of acoustic measurement of the temperature that allows us to determine the temperature of the combustion chamber up to 2.000 °C, using the physical principle that the sound waves propagate at different velocities, depending on the temperature of the combustion chamber of a combustion system.
The working principle combines simplicity to quicker results than conventional procedures. A sound signal is generated at the transmitter by compressed air. The duration of the sound signal between the transmitter and the receiver is measured in the combustion chamber. Through the propagation time we obtain the average temperature along the measurement path, the so-called path temperature. By determining the various path temperatures at the furnace level, the temperature distribution at the transversal section of the furnace is determined using advanced tomography methods.
Compared to conventional method of temperature measurement, we obtain a quicker measurement (without drift and free from the influence of radiation) being demonstrably more accurate and reliable. Easy to operate, with minimum expenditure of consumables and a very low cost.
The solution implemented and used by Valorsul, S.A. is not only an alternative compared to conventional methods of gas temperature measurement, as it also controls the essential diagnosis, monitoring and combustion process control functions, essential for the efficiency of the whole system of the boiler.
In Portugal, although this solution is only applied in the waste recovery process, there are cases of success of this application all over the world, namely in Power Plants (coal gas, oil), in incinerators (of household or hazardous waste), Cement Plants, Steel Mills, Copper Smelters and Refineries.
Know more about the AGAM system, here.