DE1901261A1 - Suction dryer for fabrics - Google Patents

Abstract

Chamber is divided by endless conveyor into 2 parts, the belt feeds fabric before entry into the chamber and removes it as it leaves, and is constructed so as to permit hot air or other vapour to pass through it. A suction device is connected to the lower division of the chamber to receive dry air or steam from the upper division.

Description

D R. -1 N G. D I P L -1 N G. G. R I E B LI N G

PATENT ADVOCATE My sign

G355 Fr / Dr.R.,

'ltfm

Please repeat in the answer

899 Lindau (Bodensee) Your message from My Message from Rennerle 10 PO Box

January 8, 1969

Greenbank Engineering Company Limited Gate Street, Blackburn, Lancester / England

Suction dryer for Geiuebe or the like

This invention relates to improvements in apparatus for suction drying permeable Woven or fabric-like materials.

When drying the conuection of permeable Tissues under pressure, in which, for example, hot air under high pressure is applied to the material to be dried Material impinges becomes a considerable amount of the

- 2

009832/0886

Feinschreiber talk time Bank account: PoiUcheckkonto: OS 4374 patent d by agreement Bayer. State bank Lindeu (B) Nr 1562 Munich 285

available work from the hot air being wasted as a result of the rebound from the material, being this rebound causes poor utilization of the available drying ability.

This disadvantage of convection drying under pressure is overcome by suction drying, placing a layer of hot, low-speed air over the Geujebematerial is provided, which is pulled through the material by means of a negative pressure, whereby the hot air with the help of the interstices of the tissue to be dried in extremely fine flow rates what is divided of the whole, in the hot air existing üiärrne allowed to be removed with the Moisture to come into close contact. In addition, due to the porosity of the materials, the one have a fairly small passage area, a high speed can be generated through the material, which results in a very high evaporation capacity »

The object of the present invention is to provide a suction dryer which has the aforesaid Disadvantages of the known drum-suction dryer overcomes and this object is achieved according to the invention by the

009832/0886

Construction of the device as a chamber achieved by an endless enclosed conveyor belt is divided into two compartments, the material is placed on the conveyor belt before entering the chamber and when it leaves the chamber it is removed and the conveyor belt is constructed in this way is that it allows hot air or other steam to pass therethrough. The suction device is connected to the lower section of the chamber and the drying one. Air or the steam uj is fed to the upper section.

The conveyor belt can be arranged in a single horizontal pass through the device or in a flow and a return, luobei in the latter arrangement the suction chamber between the two runs and an air supply chamber each above the upper course and below the lower course. This is not suitable fflodifikation zljt drying i / on loose material, since loose material would mährend of the return uon the conveyor belt fall.

In a further IiIo di f ikat ion of the invention, the conveyor belt is arranged in a vertical line,

009832/0886

it being provided, if necessary, with a device for holding the fabric on the conveyor belt _e

The invention is illustrated in the accompanying drawings illustrated schematically and with a note on it described.

It shows: :

Figure 1 shows a cross section of the embodiment of Invention in which the conveyor belt has a single course through the chamber "

Figure 2 is a similar view, but with the pull tabs on the longitudinal edges of the conveyor belt open represents.

Figure 3 is a longitudinal section showing the seals at the inlet and outlet of the conveyor belt and between represents the dryer areas.

Figure 4 shows a cross section of the embodiment of Invention in which the conveyor belt has a feed and a return through the chamber and

.. - 5 009832/0886

Figure 5 shows a device for controlling the effective width of the conveyor belt.

The device shown in FIGS. 1 and 2 consists of a suction chamber A and a feed chamber B. for drying air or steam which is supplied from a pressure chamber C, its lower surface perforated or otherwise open to the passage of air or steam.

The two chambers A and B are separated by a moving conveyor belt G, which is on one side enters the chamber and v / exits it on the other side, the conveyor belt passing through an outside The device attached to the chamber is driven.

The conveyor belt G has the shape of a perforated belt or consists of a series of cross members, u each of which is attached to an endless chain that runs over toothed transport wheels and u of one Drive is driven at a variable speed or it is of any other desired construction, to absorb the tissue and to make the passage more drying

"™ D ™"

009832/0886

Air or steam to allow therethrough _e In its preferred embodiment, it consists of chains, which are arranged by perforated inserts spaced from one another. The inserts have a box cross-section where the bottom edges of the box are bent inward to form sealing surfaces. _E

The sides of the suction chamber A are provided with plates £, over which the lower edges of the inserts move, to form a seal between the sides of conveyor belt G and chamber A.

<1

More sealing plates c. (Figure 3) are provided on each end of the dryer and extend across the conveyor belt to cover the holes in the inserts as the conveyor belt enters and exits the dryer. The sealing plates c_ are important for the satisfactory operation of the dryer and spaces are to be accommodated

'1 1

of the sealing plates _c_ necessary. Sealing plates c_ can also be provided to control the different temperatures between the dryer areas.

A fan F driven by an electric motor F.

009832/088 6

uiird} is arranged on one side of the chamber and connected to the suction chamber A. This blower draws air or steam from chamber A and guides it through line f_ to pressure chamber C, from where the air enters supply chamber B and is then drawn into chamber A by means of the negative pressure by the gear picked up by conveyor belt G uiird.

The fan F is disposed in a blower chamber which is isolated _E} uon the rest of the unit and also serves as an outlet chamber.

The fan is also connected to the line Jp, controlled by a manually operated flap f_ , in order to release a desired amount of circulating air into the open air, manually controlled flaps £ are arranged on the edges of the conveyor belt G so that by opening the flaps £ a part of the circulating air can bypass the conveyor belt G.

Fresh air enters the suction chamber A through a pipe or pipes H located in the center thereof

009832/0886

and is heated by a gas or oil burner 3 when it enters. The air can also be heated electrically or by a steam heating battery L, which is arranged in the pressure chamber C. Filters IYI can also be installed in suction chamber A.

The embodiment shown in Figure 4 is essentially the same arrangement as that shown in Figures 1 and 2 excepted that the conveyor belt G has a forward and a return through the chamber, the suction chamber A is arranged between the two runs of the conveyor belt G and two pressure chambers C are attached, one above and one below the respective feed chambers B. In this arrangement two fans are required, both of which suck the suction chamber A, but one the upper pressure chamber C and the other one feeds the lower pressure chamber C. All other details are as previously described.

By attaching uon k_ plates (see Figure 5) which are adapted to be laterally beyond the longitudinal edges of the conveyor belt is moving, can be effective

009832/08 86

Width of the latter vary. These plates ωerden by actuating one with right and left-hand thread provided touch rod K moves.

Claims

009832/0886

Claims (9)

IO claims 1. Device for suction drying of permeable fabrics or fabric-like material, g e k e η η draws through a chamber that through an endless moving conveyor belt (G) is divided into two compartments (A, B), including the conveyor belt (G) Before entering chamber (A, B) the tissue material supplied and when l / enacted the chamber dav / on is removed and the conveyor belt (G) constructed in this way is to allow the passage of heated air or other steam therethrough and a suction device (F) is connected to the lower compartment (A) of the chamber to allow drying air or steam to be fed to the upper section (B). 2. Apparatus according to claim 1, characterized characterized in that the conveyor belt (G) has a Uor- and a return through the chamber having, wherein the suction chamber (A) is arranged to / ischen the two runs of the conveyor belt (G) and a feed chamber (B), each above the upper one - 11 009832/0888 P -44 - Course and is arranged below the lower course. 3. Apparatus according to claim 1 and 2, characterized in that a the air circulating fan (F) is arranged, extracts melches air from the suction chamber (A) and via a Pressure chamber (C) feeds the feed chamber (B). 4. Device according to one of the preceding claims, characterized by a device (3, L) for preheating the circulating, drying air. 5. Apparatus according to any of the preceding claims, characterized in that sealing plates on each end of the dryer (£) that extend across the dryer to allow passage through the conveyor belt (G) during entry into and during exit cover from the dryer. - 12 - 00 9832/0886 6. Apparatus according to claim 5, characterized in that the heating device is arranged in the suction or pressure chamber (A, C). 7. Apparatus according to one of claims 4 or 5, characterized in that a heating device (θ) in a pipe or Rohreri (H) is arranged through which fresh air enters the suction chamber (A). 8. Apparatus according to claim 7, characterized in that g e k e η η shows that the heating device (3) is a gas or oil burner. 9. Device according to one of the preceding claims, characterized by a net Device (k_K for varying the effective width of the conveyor belt (G). η ο μ θ 3 2 / η 8 8