SU1096468A1 - Drum dryer for loose materials - Google Patents

Description

This invention relates to a technique for drying loose materials in rotating drums and can be used in the chemical, metallurgical and other sectors of the national household.

A flare-heated tumble dryer of bulk materials is known, comprising a rotating body with a lifting-blade nozzle located on the inner surface of the rotary drum.

The disadvantages of the known drying drum are low drying intensity and low operational reliability.

Closest to the invention to the technical essence and the achieved result is a drum dryer for bulk materials, comprising a drum with longitudinal tubes arranged circumferentially inside it, combined from opposite ends of the inlet and outlet headers, and longitudinal C 2 0.

The disadvantages of the known dryer are low drying intensity and low operational reliability.

The purpose of the invention. Intensification of the drying process and increase the resource of the crusher.

The goal is achieved by the fact that in a drum dryer for bulk materials, containing a drum with longitudinal tubes arranged inside it circumferentially, joined from opposite ends of the inlet and outlet headers, and longitudinal blades, the tubes have an oval cross-section and are relatively large the axis of the oval with an angular pitch of 15-20 5. whereby the blades are attached to these pipes in places opposite to the fastening of the pipes to the drum, and the output collector has a large its flow area than the input.

FIG. 1 shows a longitudinal section of a drum dryer; in FIG. 2, section A-A in FIG. one; in fig. 3 c-BB in FIG. one; in fig. 4, node I in FIG. one.

The dryer contains a rotating drum 1 with tubes 2 attached to its inner surface, having an oval cross-section, longitudinal blades 3 attached to pipes 2, tube plates 4, conjugated through the slots of the slide 5, respectively, with the inlet 6 and outlet 7 collectors, the output collector has a larger flow area than the input.

Drum dryer works as follows.

The material to be processed in the direction of arrow B enters the casing of the rotating drum 1, is poured onto the blades 3 and, as the drum rotates, rises from bottom to top, collapsing through a stream of flue gases passing through the drying drum 1 to meet the movement of the material. Through the discharge window, in the direction of arrow G, material is withdrawn from the drum. Gaps filled with material are formed between oval pipes with an angular pitch equal to 15-20 °, which are additionally supplied with heat from pipes heated by air coming in arrow D through the inlet annular collector 6, tube plate 4 into pipes 2. The seal between the body of the drum 1 and the tube plates 4 are carried out by means of the sliding grooves 5 ensuring sufficient tightness. From the side of the output annular collector 7, the air flow between the tube plate 4 and the drum casing 1 proceeds in a similar way. The air leaves the collector 7 in the direction of arrow E and is fed to the combustion of fuel in the burner installed at the entrance to the drum 1 from the side of the input ring collector 6.

The air entering the inlet manifold 6 prevents the drum body (7 tons of overheating.

This dryer allows to intensify the drying process with a sufficiently large working resource.

AL

Phg / g-

B-6

Claims (1)

A DRUM DRYER FOR BULK MATERIALS, containing a drum with longitudinal pipes located inside it around the circumference, connected at the opposite ends by input and output collectors, and longitudinal blades, characterized in that, in order to intensify the drying process and increase the resource, the pipes have an oval cross-section and attached to the inner surface of the drum normally relative to the major axis of the oval with an angular pitch of 15-20 ° with the mouths attached to these pipes in places opposite to the fastening of the pipes to rabanit and outlet header has a larger flow area than the inlet. §