METHOD FOR DRYING BULK CARBON OR MINERAL MATERIALS AND INSTALLATION FOR DRYING BULK CARBON OR MINERAL MATERIALS (OPTIONS)

摘要

FIELD: heating.;SUBSTANCE: drying method of granular carbonaceous or mineral materials with humidity providing granular state of material involves heat supply on several levels from heat carrier to material mass. Immediately above each level of heat supply from heat carrier there performed is heat carrier and/or steam removal; distance between level of heat supply from heat carrier and heat carrier and/or steam removal level located immediately above it, as well as between heat carrier and/or steam removal level and level of heat supply from heat carrier, which is located immediately above it, comprises at least six times maximum size of material particle; heat carrier velocity is at least 0.1 m/s; heat carrier temperature is at least 130°C; heat from heat carrier is injected into mass continuously moving in downward direction. As per the first version of the method's implementation, the drying plant of granular carbonaceous or mineral materials includes a chamber intended to supply granular material to it; in the chamber cavity there are elements for injection of heat carrier to the chamber and element of heat carrier removal from the chamber; besides, each heat carrier supply and removal element is made in the form of a channel passing through the chamber cavity and interconnected with the chamber inner cavity; each channel intended for heat carrier injection is interconnected with the heat carrier source; the plant includes at least two tiers of heat carrier injection and removal. Each tier includes heat carrier injection channels made on one level and heat carrier removal channels made on one level too, which are located immediately above heat carrier injection channel level at some distance from them. Distance between level of heat carrier injection/removal channels and level of heat carrier removal/injection channels, which is located immediately above it, is at least six times maximum size of material particle; also, distance between adjacent channels located on one and the same level is at least six times maximum size of material particle; heat carrier source is intended for supply of heat carrier gas to the chamber. As per the second version of the method's implementation, the drying plant of granular carbonaceous or mineral materials includes a chamber designed for supply to it of granular material; in the chamber cavity there are elements for injection of heat carrier heat to the chamber and elements for removal of steam from the chamber, which is formed at material drying. Each element for injection of heat carrier heat is made in the form of a closed channel passing through the chamber cavity and interconnected with the heat carrier source and with other channels for injection of heat carrier heat; each steam removal element is made in the form of a channel passing through the chamber cavity and interconnected with the chamber inner cavity; each channel intended for injection of heat carrier heat is interconnected with the heat carrier source; the plant includes at least two tiers of channels for injection of heat carrier heat and removal of steam; besides, each tier includes heat carrier heat injection channels made on one level and steam removal channels made on the same level too and located immediately above level of channels for heat carrier heat injection at some distance from them. Distance between level of heat injection channels from heat carrier and level of steam removal channels, which is located immediately above it, is at least six times maximum size of material particle; also, distance between level of steam removal channels and level of heat injection channels from heat carrier, which is located immediately above it, is at least six times maximum size of material particle; heat carrier is intended for supply of heat carrier gas to the chamber.;EFFECT: simpler design of the drying plant of granular materials; improved drying efficiency.;18 cl, 12 dwg