Product category:
Temperature measurement: Conventional
News Release from: Ametek Calibration Instruments | Subject: Biomass sensors
Edited by the Processingtalk Editorial
Team on 24 May 2007
Monitoring biomass fuel burn with
special sensors
Special 6 metre long AMK thermocouple sensors have been produced by FP Temperature Sensors, part of Ametek, for use in the production of "green" electricity and heat by burning biomass
These special sensors were commissioned by Energi Randers Production, suppliers of electricity heating and water in Randers, Denmark, following close consultation with Ametek Calibration Instruments The thermocouple sensors are supplied with a steel protective tube and an interchangeable ceramic inner tube and are used to monitor temperatures of around 1200-1300C, in two boilers, as part of a new flux firing system
This article was originally published on Processingtalk on 27 Dec 2005 at 8.00am (UK)
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They conform to standard class 2 according to IEC 584 thermocouple type N.
The sensor is mounted through the top of the furnace to a depth of approximately 700 mm.
The biomass used comprises olive cores, and meat and bone meal.
Temperature control is critical in the process since the biomass must be ignited so that it burns at once to avoid possible gas explosions.
In addition, a high temperature is required to ensure that any spores or bacteria from the fuel mass are destroyed and that any dioxin resulting from the process is completely burned.
The fuel enters the two boilers on a conveyor belt to ensure continuous combustion.
More than 100 tons of biomass is burned every 24hours.
Each boiler is equipped with two of the special sensors, and a spare was supplied for use when a sensor is removed for recalibration.
The sensors were factory calibrated and will require only annual recalibration.
In view of the length of the sensors, a unique system has been devised to allow the sensors to be exchanged for recalibration while the boiler continues to operate.
The FP Industrial Temperature Sensor product line includes a comprehensive range of thermocouple assemblies and resistance thermometers, measuring inserts, thermocouples (of precious as well as base material), thermocouple wire, extension wire, temperature transmitters and portable digital thermometers.
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