JPH03137485A - Method of drying fiber package and device therefor - Google Patents

Abstract

PURPOSE:To shorten a drying time by a method wherein a package tank is freezed in a drying circulation circuit, a fiber package with a low rate of moisture is filled in the tank during a drying operation so as to pass hot air, and a tank pressure is released after increasing a rate of moisture of the fiber package and the fiber package is transported out. CONSTITUTION:During an initial dehydration stage, changing-over valves 9 and 10 are closed, air sent into a drying tank 1 and a flowed out of a cooling device 5 is further sent to a condensing separator 8, where moisture in the air is separated. Upon completion of an initial dehydration stage, the changing-over valves 9 and 10 are opened, a changing-over valve 11 is closed, and a flow of air is sent to a package tank 12, resulting in that a dried fiber package in the tank 12 may absorb moisture in the air stream within a short period of time. In this case, the cooling device 5 is not operated. When a fiber package 14 reaches a limited moisture absorbing rate, the changing-over valve 11 is opened, the changing-over valves 9 and 10 are closed and a drying processing is continued. Inner pressure of the tank 12 is released to the surrounding atmosphere, an opening or closing lid 13 is opened and then the fiber package 14 which has absorbed moisture is replaced with dry fiber package. With such an arrangement, steam and cooling water are reduced in their consumption and then a productivity can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and apparatus for efficiently drying textile packages by circulating hot air under pressure.

[Prior art]

Conventionally, in this type of dryer, the moisture contained in the circulating heated air to raise the temperature of the fiber itself and evaporate the moisture contained in the fiber is converted into condensate in a cooler, and then condensed in a condensate separator. After the liquid was discharged, the circulating air was heated again using the heater.

[Problem to be solved by the invention]

As mentioned above, in the conventional technology, a large amount of cooling water and steam were consumed, and depending on the fiber material, a large amount of condensate was separated, requiring a long drying time.

Accordingly, the present invention aims to provide a highly productive apparatus that significantly reduces the consumption of steam and cooling water and shortens drying time.

[Means to solve the problem]

In view of the above, the present invention provides a first aspect of the present invention, in which blower→heater→
Compressed air is added to the circulation circuit of drying tank → cooler → condensate separator → blower, and the fiber package is dried by hot air circulating under pressure.
A package tank in which the fiber package can be attached and detached is connected to the circulation circuit, and during the drying process, a fiber package with a low moisture content is loaded into the package tank and the hot air is passed through it to increase the moisture content of the fiber package. , and then releasing the pressure in the package tank without reducing the pressure in the circulation circuit, and then transporting the fiber package,
In the second invention, compressed air is added to the circulation circuit of blower → heater → drying tank → cooler → condensate separator → blower, so that the fiber package is dried by hot air circulating under pressure. The fiber puff cage is characterized in that at least one package tank into which a fiber package can be attached and detached is inserted downstream of the drying tank in the circulation circuit, and the condensate separator is inserted in a roundabout manner via a switching valve. It is a drying device.

[Effect]

By creating a heated air circulation path through the package tank, the moisture content of the air leaving the drying tank is reduced to about 5% by the fiber package (14) in the package tank (12) with a low moisture content.
When the temperature is below 0°C, the condensate is absorbed into the fiber package without using a cooler, allowing efficient condensate separation.

Depending on the material to be dried, the package tank (
It is also possible to replace the fiber package (14) in 12) multiple times.

〔Example〕

The present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows an embodiment of this invention.
2 is a drying tank, 2 is an opening/closing lid, 3 is a fiber package loaded in the drying tank, 4 is a carrier, 5 is a cooler, and 6 is a heater. The air sent from the blower 7 enters the heater 6 and is controlled to a constant temperature by the temperature controller TC before passing through the switching valve 18.
It is fed into the drying tank 1 via the drying tank 1. The switching valve 18 can switch the flow of air to the fiber package 3 to be dried in the drying tank 1 from ON-+OUT to OUT → IN using an air cylinder 19 .

8 is a condensing separator, and 9.10.11 is a switching valve.

During the initial dewatering process, the switching valves 9, 10. Close the cooler 5
The air exiting the air is sent to a condensing separator 8, where moisture contained in the cooled air is separated.

This condensing separator 8 has a drain valve 17. 12 is a package tank, 13 is an opening/closing lid, 14 is a fiber package loaded in the package tank, and 15 is a carrier. The package tank 12 has a drain valve 16.

When the initial dewatering process is completed, the switching valves 9 and 10 are opened and the switching valve 11 is closed so that the air flow is sent to the package tank 12, and the dry fiber packages in the baggage tank 12 are included in the empty air flow. Absorbs moisture in a short time. In this case, the cooler 5 does not heat up. Since the moisture absorption effect of this fiber package differs depending on the material of the fiber puff cage 14, the fiber packages 3 and 14 are usually
are preferably made of the same material. When the limit water absorption rate of the fiber package 14 is reached, the switching valve 11 is opened, and the switching valve 9.
Close the IO and switch the air flow to continue the drying process.

In this state, the internal pressure of the package tank 12 is released to the atmosphere by a pressure release device (not shown), and the opening/closing lid 13 is opened.
The fiber package 14 that has absorbed moisture is taken out from the package tank 12 along with the carrier 15, and the fiber package 14 is replaced with a dry fiber package 14 before the dyeing process, and loaded into the package tank 12. After making the pressure the same as that of the switching valve 9.10.1
By the function of 1, the water absorption effect in the circulating air can be performed again.

〔Effect of the invention〕

According to this invention, while the moisture absorbing action of the fiber package (14) in the package tank (12) is working, the amount of cooling water used in the cooler (5) can be extremely reduced, and a condensation separator is not required. Since the condensate can be separated in a short time, drying time can be significantly shortened and productivity can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. l...Drying tank, 3...Dried fiber pancage, 5.
... Cooler, 6... Heater, 7... Blower, 8...
・Condensate separator, 9.10.11...Switching valve, 12.
...Package tank, 14...Fiber pan cage

Claims (1)

[Claims] 1. Blower→heater→drying tank→cooler→condensate separator→
In a device in which compressed air is added to the circulation circuit of a blower and the fiber package is dried by hot air circulating under pressure, a package tank to which the fiber package can be attached and detached is connected to the circulation circuit during the drying process. The moisture content of the fiber package is increased by loading a fiber package with a low moisture content into a package tank and passing the hot air through it, and then releasing the pressure of the package tank without reducing the pressure of the circulation circuit. A method for drying a fiber package, which comprises: drying the fiber package, and then transporting the fiber package. 2. Blower → Heater → Drying tank → Cooler → Condensate separator →
A package tank in which the fiber package can be attached and detached downstream of the drying tank in the circulation circuit, in which the fiber package is dried by hot air circulating under pressure by adding compressed air to the circulation circuit of the blower. A drying apparatus for a fiber package, characterized in that the condensate separator is inserted in a detour manner through at least one switching valve.