SU146701A1 - Drum two-stage apparatus for drying and heating granulated materials with solid heat carrier - Google Patents

Description

The famous drum rotary dryer with direct flow of hot gas and material, consisting of a perforated drum, cylindrical pockets located around the drum and intended to re-feed material into the drum, rollers located inside the drum and intended to crush the material simultaneously with drying, and concentric screens for sifting material.

The proposed two-stage drum apparatus for drying and heating the granulated material with a solid heat carrier differs from the well-known fact that inside the conical drum with help and the spacers there is a conical drum with a drip device in the form of a system of radially arranged pipes, so that the process of drying and heating proceeds more intensively .

In addition, the difference lies in the fact that an elevator device in the form of a three-walled annular pocket, divided into sections by blades, is attached to the large base of the outer conical drum. Thanks to this construction, the mixture of granulated material with solid coolant is supplied from the first stage of the apparatus to the second.

The drawing shows a diagram of the proposed two-stage drum unit.

The initial coal of grain size (1-3 mm by the feeder 1 is fed through the sleeves 2 to the drum 5 of the first heating stage, where it is mixed with the solid heat carrier leaving the second heating stage. During the mixing process with the heat carrier, the coal is heated to 220 °, screened out on a sieve 4 and by the blades m 5 enters the compartments of the 6 Elevator Ring, and the heat carrier flows for reheating. When the heating apparatus moves at a speed of 2–8 rpm, the coal number 146701-2 -

It goes upwards by the elevator ring and is discharged into the collector 7, from which, along with the hot coolant, flows along the chute 8 into the drum 9 of the second heating stage. The temperature of the hot coolant is 650 °, the particle size is 8-10 mm. In the second heating stage, the coal is heated to 410 °, screened off from the heat carrier on a W screen and enters the holding ring 11. During the holding process, the coal is dispersed, and then the heat 12 goes into molding. The heat carrier from the sieve 10 passes to the first heating stage, after which the cycle is repeated.

In the proposed design of the apparatus, a step-by-step flow of solid coolant and heated material is carried out, which, in comparison with parallel current devices, leads to an increase in the effective use of the physical heat of the coolant and a decrease in its specific consumption.

The regulation of the heating of the material is achieved by varying the amount and temperature of the solid heat transfer medium.

Subject invention

Claims (2)

1. A drum two-stage apparatus for drying and heating a granulated material with a solid heat carrier, consisting of a rotating conical baiba with sieves butt edges, a front face fixed flap with a screw device and a rear face fixed flap with a leak for a heat transfer fluid, In order to intensify the process of drying and heating, a conical drum with an overflow device in the form of a system of radially arranged pipes is installed inside the conical drum using spacers. 2. Drum two-stage apparatus according to claim I, characterized in that, in order to transfer the mixture of granulated material with solid heat carrier from the first stage of the apparatus to the second, an elevator device in the form of a three-walled annular pocket, divided into sections of blades, is attached to the large base of the outer conical drum mi