DE1940149A1 - Process and device for yarn drying - Google Patents

Description

D R. -1 N G. DIPU-ING. G. RIEBLING PATENT ADVOCATE

19A0U9

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William Tatton & Co. Limited Buxton Road, Leek, Stafford / England Lindau (Lake Constance)
Rennerle 10 P.O. Box 365

1st August 1969

Method and device for drying yarn

This invention relates to an improved method and apparatus for drying twine on bales Therefore.

According to the invention, the method comprises drawing air into a drying vessel through a

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Telephone Lindau (08382) 6917

Telegraph: 054374 patent d

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by appointment Bank account:

Bayer. State bank Lindau (B) No. 1562

Pottscheckki Munich 298

Vacuum pump, which draws air therefrom, reducing the air intake to the kettle, uienn in which a predetermined temperature has been reached, the further gradual decrease of the air inlet while the inlet and The outlet temperature is kept the same, reducing the pressure in the kettle to the boiling point to lower the water contained therein and that Maintaining this pressure until the outlet and inlet temperatures of the air are predetermined Remains constant for a period of time.

The invention is referred to the accompanying Drawings described.

It shows:

Figure 1 is an elevation of the yarn dryer illustrating a machine with a drying kettle;

Figure 2 is a plan view of the same,

Figure 3 is a schematic elevation showing a number of drying kettles.

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A Yarn drying vessel A won known construction is provided with a suction pipe 1 which is connected to a Vacuum pump 2 is connected and with one at times Tube 3 which opens into the open at 4 and a heating battery Ei between the inlet of the feed tube 3 and the well-known boiler R. · '

The drying process is carried out in two stages:

The bales of thread B on one or more frames b_ are used in a known manner in the drying kettle. With the lock or lid open _a air is sucked into the boiler, which is denser at ambient temperature and therefore this happens the pads B absorbed water by the force of the air drawn through it, rather than by removing it the air absorption of moisture.

The second stage involves closing the lock or cover «i of the drying kettle and exposure the bale B of heated air which is sucked in through the second pipe 3 via the heating battery 5. A probe 6 is provided in the pipe 1, a second probe in the pipe 3 and a third probe 8 in the boiler A.

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When the temperature of the unloaded from the boiler Air equals the inlet temperature, becomes a valve 9 gradually closed to throttle the air inlet and a predetermined vacuum becomes generated in the boiler, so that the moisture remaining in the bale evaporates uptd in this State sucked off by the vacuum pump 2, uias uniform drying of all bales results.

The negative pressure in the drying kettle A is according to controlled by the dried yarn.

For example, for a yarn to be dried at 93.3 C (200 ° F), a vacuum of 164.7 mm will be used (6 1/2 inches) Hg will cause moisture to evaporate with the heated air from the kettle drawn. The yarn is troaken when it's through the outlet and inlet temperature indicated by the probes 6 and 7 remains constant in the kettle.

LUenn thus the outlet temperature with the inlet temperature matches, the yarn drying kettle A is exposed to a vacuum. This allows the The boiling point of water on the temperature of the water

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(i.e. the higher the temperature, the lower the vacuum, the lower the temperature, the higher .the vacuum), so that all remaining moisture evaporates and evaporates in this The mold is removed by the vacuum pump 2.

The vacuum pump 2 is driven by a motor 11 and the discharge from the pump continues a separator 12 for drawing out the moisture therefrom, with the air from the separator is discharged through a muffler 21.

The water withdrawn by the pump 2 when the lid _a of the yarn drying kettle A is open is in operation contaminated by soap or other contaminants and a valve 13 is opened to the drain of the water. When the lid is closed has been, the withdrawn water is fed to a storage tank in which the valve 13 is switched to close the process.

The tubes 1 and 3 are each provided with a further valve 18 and 19, respectively.

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Further tubes 14 and 15 are provided which connect the tube 1 to the tube 3 and jeuieils with a valve 16 bziu. 17 are provided, so that by closing the valves 18 and 19 and by opening the valves 16 and 17, the direction of flow of the air through the yarn drying kettle A is reversed can be. The valves are by motor or manually operated.

The pump 2 operates a number of boilers, A, as shown in Fig. 3, or e.s becomes a number used by pumps »

Claims

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Claims (6)

1940U9 claims 1. Method for drying yarn on bales in a kettle, characterized by drawing air into you Drying kettle (A) by a vacuum pump (2) which extracts air therefrom, reducing the air connection to the boiler (A), if one a predetermined temperature is reached therein and the further gradual decrease of the Air inlet while the inlet and outlet temperature is kept the same, reducing the pressure or vacuum obtained and that Maintain this pressure until the outlet— and the inlet temperature of the air remains constant for a predetermined time. 2. The method according to claim 1, characterized in that initially air with the lid (a) open is drawn through the kettle (A) and finally the lid is closed and the vacuum is generated in the kettle. -S- OÜSS'U / 1 304 1940U9 3. l / experience according to claim 1 or 2, characterized characterized in that the air and the water are separated and the air through a muffler (21) is ejected. 4. Device for performing the method υοβ claim 1, marked by a Vacuum pump (2) to draw air through a boiler (A), a heating battery (5) to heat the in the boiler (A) entering air and one Device for controlling the air supply to the boiler (A). 5. Apparatus according to claim 4, characterized by a separator (12) in which the Air and the water from the boiler (A) is drawn, a device (13) to the water one Drain or a storage container and a silencer (21), through which the air into the open is delivered. ■ ■ ■ - g _ 009814/1304 3 1940U9 6. Apparatus according to claim 4, characterized by an arrangement (16, 17, 18, 19) for reversing the direction of the air flow through the drying kettle (A). 009814/1304 Empty soap