Pyrometric measurement of dust-laden gas temperature

Marr, R.A.; Wynnyckyj, J. R.; Rhodes, E. J.

doi:10.1007/bf02658113

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…). Errors arising in the use of an IR pyrometer in a WTE boiler are mainly due to the flue-gas features and to environmental conditions [ 21 , 22 ].…”

Section: Gas Temperature Measurement In Waste-to-energy (Wte) Boilersmentioning

confidence: 99%

Temperature Measurement in WTE Boilers Using Suction Pyrometers

Rinaldi

Najafi

2013

Sensors

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The temperature of the flue-gas in the post combustion zone of a waste to energy (WTE) plant has to be maintained within a fairly narrow range of values, the minimum of which is prescribed by the European Waste Directive 2000/76/CE, whereas the maximum value must be such as to ensure the preservation of the materials and the energy efficiency of the plant. A high degree of accuracy in measuring and controlling the aforementioned temperature is therefore required. In almost the totality of WTE plants this measurement process is carried out by using practical industrial thermometers, such as bare thermocouples and infrared radiation (IR) pyrometers, even if affected by different physical contributions which can make the gas temperature measurements incorrect. The objective of this paper is to analyze errors and uncertainties that can arise when using a bare thermocouple or an IR pyrometer in a WTE plant and to provide a method for the in situ calibration of these industrial sensors through the use of suction pyrometers. The paper describes principle of operation, design, and uncertainty contributions of suction pyrometers, it also provides the best estimation of the flue-gas temperature in the post combustion zone of a WTE plant and the estimation of its expanded uncertainty.

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“…). Errors arising in the use of an IR pyrometer in a WTE boiler are mainly due to the flue-gas features and to environmental conditions [ 21 , 22 ].…”

Section: Gas Temperature Measurement In Waste-to-energy (Wte) Boilersmentioning

confidence: 99%

Temperature Measurement in WTE Boilers Using Suction Pyrometers

Rinaldi

Najafi

2013

Sensors

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“…First, radiant energy can be scattered by the particles (either into or out of the line of sight of the pyrometer) such that the total radiation received by the pyrometer is the sum of emitted plus scattered or reflected radiation. One group of researchers solved this problem by using a mathematical model coupled with on-line computation to account for the effects of scattering (Marr et al, 1990). Other researchers avoid the problem by taking measurements in dilute particle concentrations such that particle effects on each other are negligible (Tichenor et al, 1984;Fletcher, 1989;Schroeder et al, 1992).…”

Section: A82 Particle Temperaturesmentioning

confidence: 99%

Advanced combustor design concept to control NOx and air toxics

Eddings¹,

Pershing²,

Molina³

et al. 1999

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Composition pathway in Fe–Cu–Ni alloy during coarsening

Mukherjee¹,

Choudhury²,

Nestler³

2013

Modelling Simul. Mater. Sci. Eng.

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In this work the microstructure evolution for a two phase Fe–Cu–Ni ternary alloy is studied in order to understand the kinetic composition paths during coarsening of precipitates. We have employed a quantitative phase-field model utilizing the CALPHAD database to simulate the temporal evolution of a multi-particle system in a two-dimensional domain. The paths for the far-field matrix and for precipitate average compositions obtained from simulation are found to be rectilinear. The trends are compared with the corresponding sharp interface theory, in the context of an additional degree of freedom for determining the interface compositions due to the Gibbs–Thomson effect in a ternary alloy.

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Pyrometric measurement of dust-laden gas temperature

Cited by 3 publications

References 1 publication

Temperature Measurement in WTE Boilers Using Suction Pyrometers

Temperature Measurement in WTE Boilers Using Suction Pyrometers

Advanced combustor design concept to control NOx and air toxics

Composition pathway in Fe–Cu–Ni alloy during coarsening

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