DE2803165A1 - DRYERS FOR SMALL ITEMS - Google Patents

Description

280316b

PISCHEKSTR 19, "TeL 242761-2

A 12 156

i -dm

January 23, 1978

SOHEMA company. S.r.L., Erba (Gomo), Italy.

"Dryer for small items".

The invention relates to a dryer for small pieces ges wet goods according to the type in which the wet goods are transported through the dryer by a strong air flow and be Water content is withdrawn from it in that the material is thrown against a suitable screen wall which is arranged more or less obliquely with respect to the direction of flow will.

With the known dryers of this type, in addition to the air flow mentioned, an additional, transversely directed,

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almost perpendicular to this air flow provided, which presses the liaßgut even more violently against the sieve wall and thereby promotes dehydration.

This second air flow perpendicular to the first, the mostly generated by a fan, but has the disadvantage that it causes the 3? roeken material to accumulate on the sieve wall, as a result of which the dry goods are no longer conveyed, and, by sticking to the screen wall, clogging it. Bas naturally causes a significant decrease in potency of the iDrocker.

The main object of the invention is to create an air-flow dryer of the type described, does not adhere to the above part.

The main object of the invention is to create a "fragrance flow dryer, which is extremely simple in construction, requires little maintenance, and has good properties with little energy Removing the moisture.

The objects of the invention are achieved by a dryer which has a feed line for a main flow of the wet material conveying air, a Naßgutbesehiekungsraum, which is at the outlet of the air supply line is arranged and a channel for conveying the sauteed material on the part of the air flow ujifauges, which with the I / uftzuleitung one forms acute angle and is provided with a screen wall for holding back and diverting the material in the conveying direction, thereby characterized in that the same dryer has a supply line for one has additional secondary air flow connected to the conveyor channel communicates via holes in one of the sieve

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wall opposite wall of the conveyor channel is recessed and arranged so that the secondary air flow in one direction penetrates into the conveying channel, which forms an acute angle with the screen wall.

According to the invention, the transverse or secondary air flow therefore runs no longer perpendicular to the primary air flow that transports the wet material, but the secondary air flow forms with the primary air flow or with the screen wall, which it leads along the conveying channel, an acute angle (preferably 4-5 ° or slightly smaller), whereby the drying effect of the dryer is increased without causing undesirable accumulations of the wet material and clogging of the "screen wall.

In addition, the holes in the sieve wall are prevented from being blocked by any dirt particles.

This considerable increase in the drying effect of the dryer is achieved without the need for centrifugal fans, or other, previously used devices, which simplifies the production and the maintenance and energy requirements be reduced.

The above and further features of the invention emerge from the following, more detailed description of a possible embodiment, which is shown as an example in the accompanying drawing is. Show it:

1 shows a longitudinal section through the dryer according to the invention along line I - I of FIG. 2,

Fig. 2 is a plan view of the same dryer,

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Fig. 3 is a longitudinal section through an enlarged part of the same Dryer of Fig. 1> and

FIG. 4- a cross section through the same part along line IV IV of FIG. 5.

The dryer shown in the drawing initially comprises a supply line 1 for the main air flow, which is to be dried

de Well promotes and from a (not shown) compressed air source is fed via appropriate (also not shown) pressure regulating means.

At the outlet of the air supply line 1, a loading space 3 is arranged in the housing 2, where the cash items from the through the supply line 1 incoming air is detected. The charging space 3 is provided with a flat Venturi tube 4, into which a Funnel 5 for filling the wet material to be dried opens.

At the exit of the loading space 3 a channel 6 is provided, into which the wet material is conveyed by the main air flow, which channel 6 has a first rectilinear section 7 with a rectangular (or square) cross-section, which section has an acute angle (about 15 °) with the exit of the loading space 3 forms. The rectilinear section 7 contains a screen wall 8 to which the of the Main air flow entrained wet material is thrown in order to remove the water content from it. Below the screen wall 8 is a collection and drainage channel 9 for through the Holes of the screen wall 8 provided seeping liquid.

A wall 10 of the Naßgutförderkanals 6, which the sieve wall 8 ge

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is opposite, has a plurality of holes 11 (Fig. 3), the recessed and aligned that one direction of flow is determined with the axis of the rectilinear section 7 of the iiaßgutf örderkanal 6 an acute angle (preferably 45 ° or slightly smaller).

The channel 6 with a chamber i2 stands in through the holes 11 Connection (Fig. 1, 3 and 4) in which two lines 13 for the supply of two secondary air flows (Fig. 2) open. The two secondary air flows are preferably the same Compressed air source fed from the main supply line 1, but with independent means for pressure control preferably are to be provided.

During operation, the main air flow that flows through the Feed line 1 with one depending on the type of dry material appropriately set pressure is promoted in the flat formed Venturi tube from the side, and takes 5 wet material with it from the funnel. The main air flow with the entrained Haßgut then penetrates the rectilinear section 7, where they impinges on the sieve wall 8, the inclination of which causes the dry material to be thrown against the sieve wall. This skidding is supported by the secondary air flow, but not up to the undesired accumulation of wet material, whereby the secondary air flow penetrates through the hole 11 in the wall 10 at the desired angle of inclination.

The water content is withdrawn from the wet material holes of the screen wall 8 seeps and is discharged through the channel 9. The holes are made by the flowing out of the chamber 12

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Air kept free. As a result of the strength of the directed main air flow the dried material makes its way through the secondary air flow to the outlet without hindrance of the dryer.

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Claims (4)

PATENT CLAIMS / 'Κ / Dryer for light, small-sized goods that have a supply line for a main flow of the wet goods conveying air, a wet goods loading room, which is arranged at the outlet of the air supply line and a channel for conveying the wet material on the part of the air flow comprises, which forms an acute angle with the air supply line and with a screen wall for retention and discharge of the goods is provided in the conveying direction, thereby characterized in that the same dryer has at least one supply line for an additional secondary air flow, which is connected to the conveyor channel via holes in a wall of the conveyor channel opposite the screen wall recessed and arranged so that the secondary air flow penetrates in one direction into the conveying channel, which forms an acute angle with the screen wall. 2. Dryer according to claim 1, characterized in that the acute angle formed by the secondary air flow with the main air flow is equal to 4-5 or less. 3. Dryer according to claim 1, characterized in that the through the NaßgutfOrderkanal formed with the supply of the exhaust air Angle is almost 15 °. 4. Dryer according to claim 1, characterized in that the loading 809832/0674
/ "ORIGINAL INSPECTED _ζ . 280316S Send room for the wet goods with a flat one Venturi tube is provided. 5 · dryer according to claim 1, characterized in that the wet material conveying channel has a rectangular or square cross-section. 809832/0674