Characteristics of seed-slag fouling in MHD steam plants
At the Argonne MHD Process Engineering Laboratory (AMPEL), five tests have been carried out to investigate the depositiono of seed-ash deposits that form on tubes in the convective sections of the MHD/steam bottoming plant. The effect of these deposits on heat transfer, their tenacity, and their composition were determined. In these tests, combustion gas containig ash particles and K/sub 2/SO/sub 4/ was passed through a bank of 15 vertical, cooled tubes, which simulated a steam superheater or reheater. The tube wall temperatures were between 580 and 860 K. Over the gas temperature range of 1230 to 1820 K, the seed material in the gas stream was present as vapor, liquid droplets, or solid particles. The deposits that formed on the tubes were mostly K/sub 2/SO/sub 4/ with 10 to 40 mass % ash. The slag phase contained about 10 mass % water-insoluble potassium. The seed-ash deposits were of two distinct types. Effective thermal conductivities of deposits formed at gas temperatures above the seed melting point ranged from 0.33 to 0.4 W/m.K and tended to increase with temperature. From these conductivities, fouling factors can be estimated for a wide range of gas condtions and tube bank configurations. The tests completed to date support the premise that the convective sections of the NHD/steam bottoming plant can be designed to perate efficiently and reliably. (WHK)
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6206936
- Report Number(s):
- CONF-820645-8; ON: DE83009049
- Resource Relation:
- Conference: 20. symposium on engineering aspects of magnetohydrodynamics, Los Angeles, CA, USA, 14 Jun 1982; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Seed-slag fouling and corrosion in an MHD steam bottoming plant
Seed-slag fouling and corrosion in an MHD steam bottoming plant
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
COAL-FIRED MHD GENERATORS
SEED-SLAG INTERACTIONS
COMBINED-CYCLE POWER PLANTS
MHD POWER PLANTS
FOULING
STEAM LINES
AIR HEATERS
ASHES
BOTTOMING CYCLES
CLEANING
DEPOSITION
DEPOSITS
HEAT TRANSFER
PIPES
POTASSIUM SULFATES
SLAGS
SPENT SEED
STEAM SYSTEMS
SUPERHEATERS
ALKALI METAL COMPOUNDS
DIRECT ENERGY CONVERTERS
ENERGY SYSTEMS
ENERGY TRANSFER
HEATERS
MHD GENERATORS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
POWER PLANTS
RESIDUES
SULFATES
SULFUR COMPOUNDS
THERMAL POWER PLANTS
THERMODYNAMIC CYCLES
300103* - MHD Generators- Materials
Components
& Auxiliaries
200102 - Fossil-Fueled Power Plants- Power Cycles