SU1252632A1 - Combination drier - Google Patents

Description

The invention relates to heat treatment apparatus used in the building materials industry for drying dispersed materials, and can also be used in other branches of the national economy.

The purpose of the invention is the intensification of heat and mass transfer.

In the drawing, a schematic illustration of the proposed combined dryer is shown.

In case 1, a fluidized bed chamber 2 is placed with an annular gap, having a gas distribution plate 3 with a shell 4 and a gas supply duct 5. Inside the chamber 2 there is a flow chamber in the form of a pipe with a diffuser 6 at the outlet, which includes an accelerating part - current 7 and separation section 8 with gas distribution grid 9 in the lower part. For feeding the wet material in the upper part of the separating section 8, a loading nozzle 10 is installed, and a hopper 11 with a nozzle 12 is provided for unloading the dried material. In the upper part of the body there is a nozzle 13 for removing the spent heat. To remove the coarse fraction from the separation section 8 above the grill 9, a branch pipe 14 is placed.

° The combined dryer works in the following way.

Wet mat; a wide polydisperse rial enters through pipe 10 into the upper part of separation section 8. From below, through the gas distribution grid 9, coolant is supplied, which passes through the separation; ion section 8, under M. Bllanar

Compiled by Y. Martinchik

Tehred I. Veres Corrector S. Cherni

4614/42

Circulation 634Subscribe

INSIGHTS of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

Production and Printing Enterprise, Uzhgorod, ul. Project, 4

grabs the fine fraction of the material and brings it to section 7. The large fraction of the material falls down onto the grate 9 and through the nozzle 14 is removed from the dryer. Particles of the fine fraction of the material, acquiring a predetermined velocity in section 7, are carried into the diffuser 6, where a flowing osfifi layer is formed with the circulation movement of the material up and down along the inclined walls of the diffusor. Gradually, the height of the flowing layer reaches the level of the location of the diffuser 6 above the gas distribution plate 3 and the overflow of particles into the fluidized bed chamber 2 begins. The heat carrier coming through the gas supplying unit 5 creates on the gas distribution plate 3 a fluidized bed (boiling) layer in which the final drying of the material takes place. When the fluidized bed reaches the edges of the shell 4, the material overflows into the bunker 11, from where it is discharged through the nozzle 12. 3 due to the exclusion of the reverse current of particles from the shell 4 into the diffuser 6 during expansion of the fluidized bed. The use of separation section 8 allows the dried dispersed material to be classified by size. The degree of its classification is determined by the cross-sectional area of the accelerating 7 and the separation 8 sites.

Claims (1)

COMBINED DRYER, containing the body and the axisymmetrically located chambers of the fluidized and flowing layer, the last of which has a diffuser at the outlet, building materials and structures named after P.P. Budnikova (72) V.V. Titov, B.P. Betev, G.D. Ashmarin and V.I. Maystruk (53) 66.047.751 (088.8) (56) USSR Copyright Certificate No. 500442, cl. F 26 B 17/10, 1977. USSR copyright certificate I "645010, cl. F 26 B 17/10, 1977. USSR copyright certificate No. 1151797, cl. F 26 B 17/10, 1984. characterized in that, in order to intensify heat and mass transfer, the gushing layer chamber is located inside the fluidized bed chamber and is made in the form of a pipe consisting of a lower separation section and an upper booster section adjacent to the diffuser, the separation section in the upper part having a loading branch pipe, and in the lower one, an inclined gas distribution grill with a coarse fraction outlet pipe, placed geogrzg n ^