Particulate sampling methods used at the University of Tennessee Space Institute's coal fired magnetohydrodynamic (MHD) facility

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7039300

Douglas, J R ^[1]

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1. The Univ. of Tennessee Space Institute, Tullahoma, TN (US)

The University of Tennessee Space Institute (UTSI), operates a coal-fired magnetohydrodynamic (MHD) research facility with downstream components capable of simulating a steam bottoming plant with particulate control devices. The major downstream components of the coal fired flow facility (CFFF) include a superheater test module (SHTM); an air heater; and three parallel particulate control devices, a baghouse, electrostatic precipitator (ESP), and venturi scrubber/cyclone system. Major differences between MHD and conventional coal fired power plants are higher combustion temperatures of 2760{degrees}C (5000 {degrees} F) and the presence of 1% potassium in the total flow. These high temperatures and the addition of potassium carbonate seed are used to enhance the conductivity of the plasma in the MHD generator. High combustion temperatures cause all of the potassium carbonate and some of the coal ash to vaporize. Upon cooling, they form fly ash and submicron potassium sulfate particles. Mass loading tests were performed to evaluate baghouse, ESP, and venturi/cyclone performance and samples were taken with cascade impactors to determine the particle size distribution.

• OSTI ID: 7039300
• Report Number(s): CONF-880679--
• Country of Publication: United States
• Language: English

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