CS260229B1 - Drier with dry material preheating - Google Patents

Abstract

The solution is in the area of twirling, agricultural, drying, the problem of streamlining the drying process optimum use of exhaust air from its own drying process for gelling material. Its essence lies in that the drying chamber is via a transfer point air chambers provided with horizontal dividers through a screen wall to a preheating air chamber.

Description

The invention relates to an oven with preheating of dried material, in particular agricultural

Dryers without preheating are known, provided in the drying chamber with material pipes connected to the hopper, and secondly, driers with preheating by means of exhaust air from the drying process itself. Dryers with material piping in the drying chamber separate the material to be dried from direct contact with the drying air, but on the one hand, and by not using exhaust air to pre-dry the material, they are characterized by low heat efficiency. The known prior art preheating dryers then cause the material to be contaminated by the blown off impure exhaust air, resulting in clogging of the necessary sieves and again reduces the efficiency of the work.

These disadvantages are overcome by a new dryer with preheating of the dried material passing through the material pipes in the preheating air chamber, provided with the transfer of the drying air from the drying chamber and the transfer of the material from the preheating air chamber to the drying chamber. The principle of the invention is that the drying chamber is connected to a preheating air chamber by means of a transfer air chamber provided with a separating horizontal partition.

The dryer with preheating of the dried material according to the invention provides a substantially higher effect by separating the warmer air stream in the lower part, where the air due to the drier material does not cool so much from the cooler air stream in the upper part and achieves more efficient pre-drying and drying. The anti-aggressive side covers are then further dried in a windy weather.

2.

260 229

An example of an embodiment of the dryer according to the invention is shown in the accompanying drawings, in which Fig. 1 is a vertical partial section of the dryer and Fig. 2 is a plan view of Fig. 1.

A drying air supply line 1 is connected to a hot-air unit (not shown) into a drying chamber 2, below which a cooling chamber 3 is optionally arranged with a cooling air supply 4. At the bottom there is a discharge outlet 5 of the material. The drying chamber 2 is connected to a transfer air chamber 6, optionally divided by a horizontal partition 7 into an upper part 8 with cooler air and a lower part 9 with warmer air, to streamline the process by preventing mixing cooler air above with warmer air below. In the transfer air chamber 6, an inlet door 10 or a manhole door 11 is arranged for its cleaning, in the horizontal partition 7 for entry into the upper part 8 of the transfer air chamber 6. The transfer air chamber 6 is followed by a preheating air chamber 12 7 and provided with possibly windwind side exit covers 13. In the preheating air chamber 12, vertical or possibly oblique (not shown) material pipes 14 are disposed leading to the discharge outlet 15 of the pre-drying material, followed by a thermally insulated conveyor of preheated material. A feed hopper 17 is provided above the material pipes 14 above the pre-heating air chamber 12 and opens into the material pipes 14, respectively. these come directly from it. A sieve wall 18 may be provided between the transfer air chamber 6 and the preheating air chamber 12, but this is not a requirement.

The drier according to the invention works like this. The material passes from the feed hopper 17 into the material ducts 14 through which the preheating air chamber 12 is preheated and a heat insulated conveyor (not shown) is preheated into the drying process in the drying chamber 2 where it is dried with considerable energy savings. .

Claims (2)

SUBJECT ΤΙΚίίΕΖΠ 260 229 A drier with preheating of dried material passing through material pipes in a preheating air chamber, comprising transferring drying air from the drying chamber and transferring the material from the preheating air chamber to the drying chamber, characterized in that the drying chamber (2) is a transfer air chamber (6). (2) connected to the preheating air chamber (12) via a screen wall (18). Dryer according to claim 1, characterized in that the preheating air chamber (12) is provided with weather-proof side outlet covers (13).