TY - JOUR

T1 - Microwave Drying of Moist Coals

AU - Salomatov, Vl V.

AU - Karelin, V. A.

AU - Sladkov, S. O.

AU - Salomatov, Vas V.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Physical principles and examples of practical implementation of drying large bodies of coal by microwave radiation are considered. It is shown that energy consumption in microwave drying of brown coals decreases to 1.5–1.8 (kW·h)/ kg as compared with traditional types of drying, for which the expenditures of energy amount to 3.0 (kW·h)/kg. In using microwave drying, the technological time of drying decreases to 4 h, whereas the time of convective drying, with other things being equal, comes to 8–20 h. Parallel with microwave radiation drying, grinding of a fuel takes place, as well as entrainment of such toxic and ecologically harmful elements as mercury, chlorine, phosphorus, sulfur, and nitrogen. An analysis of the prospects of using a microwave energy for drying coal fuel has shown that microwave radiation makes it possible to considerably economize in energy, increase explosional safety, improve the ecological situation, and reduce the metal content and overall dimensions of the equipment.

AB - Physical principles and examples of practical implementation of drying large bodies of coal by microwave radiation are considered. It is shown that energy consumption in microwave drying of brown coals decreases to 1.5–1.8 (kW·h)/ kg as compared with traditional types of drying, for which the expenditures of energy amount to 3.0 (kW·h)/kg. In using microwave drying, the technological time of drying decreases to 4 h, whereas the time of convective drying, with other things being equal, comes to 8–20 h. Parallel with microwave radiation drying, grinding of a fuel takes place, as well as entrainment of such toxic and ecologically harmful elements as mercury, chlorine, phosphorus, sulfur, and nitrogen. An analysis of the prospects of using a microwave energy for drying coal fuel has shown that microwave radiation makes it possible to considerably economize in energy, increase explosional safety, improve the ecological situation, and reduce the metal content and overall dimensions of the equipment.

KW - coal

KW - dielectric heating

KW - dispersion

KW - drying

KW - microwave radiation

UR - http://www.scopus.com/inward/record.url?scp=85018823400&partnerID=8YFLogxK

U2 - 10.1007/s10891-017-1591-0

DO - 10.1007/s10891-017-1591-0

M3 - Review article

AN - SCOPUS:85018823400

VL - 90

SP - 497

EP - 508

JO - Journal of Engineering Physics and Thermophysics

JF - Journal of Engineering Physics and Thermophysics

SN - 1062-0125

IS - 2

ER -