METHOD FOR INDIRECT HEAT DRYING OF DISPERSE MATERIAL, METHOD OF PRODUCING CLEANED COAL, DEVICE FOR INDIRECT HEAT DRYING, AND DEVICE FOR PRODUCING CLEANED COAL Russian patent published in 2016 - IPC F26B3/24 F26B11/04 F26B21/04 C10L5/00 C10L5/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to method and device for indirect heat drying of disperse material, method and device for producing clean coal. Method and apparatus for indirect heat drying of disperse material uses two dryers for indirect heat drying. Method involves: step (A), in which dispersed material is dried in a first dryer for indirect heat drying; and step (B), in which dispersed material is further dried in a second dryer for indirect heat drying, to obtain dried disperse material. Method for indirect heat drying of disperse material is characterised by that it additionally includes a step (C), which comprises extracting first microparticles contained in gas-carrier taken from first dryer for indirect heat drying, and mixing with disperse material fed into stage (B); and a step (D), which comprises extracting second microparticles contained in gas-carrier taken fro second dryer for indirect heat drying, and mixing with dried disperse material obtained at step (B). Method of producing clean coal includes a step (α), which comprises mixing dispersed porous coal with oil to form a suspension of raw material, step (β), where suspension of raw material is heated to form a dehydrated suspension, step (γ), which comprises separating dehydrated suspension into porous cleaned coal and oil, and step (δ), where separated porous cleaned coal is dried, wherein step (δ) employs a method for indirect heat drying of disperse material according to claim 1 or 2 or 3. Device for producing clean coal comprises a mixer, heating device, device for solid phase-liquid separation and drying device, which is a device according to claim 5.

EFFECT: invention shall provide stability of balance between pressure of carrier gas.

6 cl, 3 dwg