DE196597C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

-M 196597 CLASS 82 α. GROUP

Rotatable drum vacuum dryer. Patented in the German Empire on June 20, 1906 .

The invention relates to a vacuum dryer. with rotating drum and aims to achieve a good seal of the inlet and outlet as well as the air suction pipe, in that only a simple stuffing box of small dimensions serves to seal all inlets and outlets. For this purpose, the feed pipe and the discharge pipe are used

ίο for the air arranged concentrically to one another, and a single gland seals the outermost of these pipes against a corresponding one Trim off a drum base. Since the inlet and outlet are on the same side of the drum, so can the second drum base must be completely closed.

It should be possible to maintain a vacuum inside the drum, which corresponds to that of the associated air pump. The efficiency of the dryer will further increased by the fact that the water vapors developing from the material to be dried are sucked off immediately as they arise, without coming into contact with the already dried material again can come. This is achieved in that the air suction pipe is almost as long is like the feed pipe and therefore ends almost at the point of entry of the goods.

The drawing shows the dryer, namely FIG. 1 is a longitudinal section through it, FIG. 2 is a section along line AB of FIG. 1 and FIG. 3 is a section along line CD of FIG. 1. FIGS. 4 to 6 show Details on an enlarged scale.

The drying drum α lies in a known manner rotatably on the rollers b and is heated by a jacket c which is connected to a steam boiler by pipe d, while the pipes e and / or the condensation water discharge.

Inside the drum there is a pipe g which is connected to the filling sluice consisting of the two chambers h , which are alternately connected to this pipe by slides i. The lock chambers have filling openings at the top that can be shut off by slides j.

This pipe g is concentrically surrounded by a second pipe k , which is connected to the air pump through the connector I.

The screw m, which is firmly connected to the drum and rotates with it, sits on this tube k, which together with the tube g is stationary. The screw is surrounded by a piece of pipe η , which also sits on the drum and enters the stuffing box 0, which is used for sealing to the outside. On the stuffing box 0 there is a chamber p which is connected to the two lock chambers r by two pipes q . Here, too, gate valves are again s provided at each lock chamber.

The inside of the drum is partially filled at t with pieces of iron, which are held back by a sieve plate u

Claims (1)

the. In front of the drum still carries scoops v, which feed the material to the screw m. 4, 5 and 6 show, on a larger scale, the arrangement of these scoops, seen from the inside, as a section along the lines 1-2-3 and 4-5, respectively. The scoops ν are, as can be seen from the figures, attached to the spherical cap-shaped bottom v ^{l of} the drum and their inner edge i> ² is slightly bent in order to be able to hold a larger amount. The bottom of the ball itself has the two blade openings v ^s at the inner end, through which the scooped powder falls onto the screw m. The drum is driven in a known manner by a ring gear n> together with a gear χ and a bevel gear reducer y.
The operation of the device is as follows. The drum is set in rotation by the back gear y and the gear χ together with the ring gear w and the jacket c thereof is brought to the appropriate temperature through the tubes d. The inner tube g is then connected to one of the lock chambers h and the air pump connected to / is started so that the drum receives negative pressure and the sludge to be dried flows from the container h into the drum. Under certain circumstances, pressure can also be exerted on the container h in order to accelerate the conveyance. In the drum, the sludge is dried and loosened into powder by the iron pieces t , whereupon it passes through the sieve plate u to the scoops ν , which transfer it to the screw m , whereby the powder into the front chamber ρ and from here through one of the pipes q enters one of the lock chambers r . If one of the storage containers is exhausted, its slide i is closed and the corresponding slide of the other container h , which has meanwhile been filled, is opened. In the same way, when one of the discharge chambers r is open, the corresponding slide s is closed and the other chamber is connected to the dryer, while the powder can be emptied downwards from the first chamber through the discharge opening. This enables uninterrupted operation of the device. The drum can of course be heated with hot water instead of steam, Air, electricity or even by direct firing using coal, gas and the like. Godfather nt-A ν saying: Vacuum dryer with rotatable drum, characterized in that the feed pipe (g) lying in the axis of rotation of the drum and leading to near the rear end of the drum is surrounded almost in its entire length by the air suction pipe (k) , which in turn is surrounded by the one stuffing box ( OJ supporting outlet pipe (s) for the dried material is concentrically enclosed. 1 sheet of drawings. BErLiH. printed in the ReichsdruckereI.