JPH0160100B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure dewatering method and apparatus, and more specifically, the present invention relates to a pressure dewatering method and apparatus, and more specifically, the present invention relates to a pressure dewatering method and apparatus, and more specifically, the present invention relates to a pressure dewatering method and an apparatus, and more specifically, the OUT
-Relates to a method and apparatus for making the moisture inside and outside of the object to be treated uniform by using an IN-OUT air flow after dehydration by IN fluid pressure.

[Conventional technology]

A method and apparatus for pressure dewatering textile products are known, as disclosed in Japanese Patent Application Laid-Open No. 50-30754. According to this prior art, the pressure inside the processing tank is increased by high-pressure air sent from an air tank, and after this pressure reaches a certain level, the high-pressure air supply valve is closed, and the discharge valve attached to the processing tank is closed. The dehydration process was carried out by opening the chamber and utilizing the resulting pressure difference between the inside and outside of the object to release the water contained within the object.

[Problem that the invention seeks to solve]

However, in the conventional pressure dehydration technology as described above, since water is simply dehydrated in one direction from the outside to the inside of the processed material, the amount of moisture remaining in the processed material differs between the inside and outside, and the next drying During the process, drying spots may occur, or the drying process may take a long time.

Therefore, the present invention equalizes the amount of water remaining in the processed material after pressure dehydration, equalizes the drying process in the next step, and saves the energy required for drying. An object of the present invention is to provide a pressure dehydration method and apparatus that can shorten drying time.

[Means for solving problems]

According to the present invention, there is provided a pressure dehydration method, which comprises loading an inner tank for holding a workpiece in which a workpiece is mounted in a closed treatment tank; A dewatering valve provided in communication with the internal space of the inner tank is closed, and high-pressure air is supplied into the sealed processing tank to reduce the internal space within the sealed processing tank and the inner tank for holding the material to be treated. After maintaining the internal pressure at a constant high pressure, the dewatering valve is suddenly opened to rapidly discharge the high-pressure air in the internal space of the inner tank for holding the objects to be processed, thereby removing the objects to be processed. A pressure difference is created between the inside and the outside, a sudden flow pressure is applied to the object to be treated, and the moisture in the object is dehydrated, and then high-pressure air is made to flow back from the inside of the object to the outside. , which is characterized by equalizing the moisture content inside and outside the object to be treated.

Further, according to the present invention, a pressure dehydration device is provided, which includes a sealed processing tank loaded with an inner tank for holding a processing object, into which a processing object is attached;
a first high-pressure air supply piping for supplying high-pressure air into the sealed treatment tank; and a second high-pressure air supply piping for supplying high-pressure air into the internal space of the inner tank for holding objects to be treated. , comprising a first exhaust pipe for discharging the air in the internal space of the inner tank for holding the processed material, and a second exhaust pipe for discharging the air in the sealed processing tank. , and each pipe is provided with an air supply valve or an exhaust valve, and in step 1, a first air supply valve attached to the first supply pipe and a first air supply valve attached to the first exhaust pipe are provided. and a first exhaust valve attached to the second supply pipe and a second exhaust valve attached to the second exhaust pipe are simultaneously closed. In the next step, the first air supply valve and the first exhaust valve are closed at the same time, and the second air supply valve and the second exhaust valve are opened at the same time. It is characterized by

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the accompanying drawings, FIG. 1 is a diagram schematically showing an example of a pressure dewatering apparatus according to the present invention. In the figure, 1 is a compressor, 2 is an air tank, and 3 is a processing tank. Air pressurized by compressor 1 is sent to air tank 2 via piping.
is supplied to This pressurized air is supplied to the air tank 2
The internal pressure of the pressure switch 4 is the set pressure (e.g. 8.5
Kg/cm ² G) is stored in the air tank.

The air tank 2 and the processing tank 3 are connected to each other so as to supply high-pressure air to the space outside the inner tank 8 for holding objects inside the processing tank 3. First high pressure air supply piping 5
A second high-pressure air supply pipe 6 communicating with the air tank 2 is provided so as to supply high-pressure air to the internal space of the inner tank 8 for holding objects to be treated. An air supply valve V ₁ is attached to the second pipe 6, and an air supply valve V ₃ is attached to the second pipe 6.

The treatment tank 3 is composed of a sealed container,
This is loaded with an inner tank 8 for holding an object to be processed, in which a textile product 7 (including yarn and fabric) as an object to be processed is mounted.

The processing tank 3 includes a first pipe 9 that communicates with the internal space of the inner tank 8 and discharges high-pressure air to the outside of the processing tank 3, and a first pipe 9 that communicates with the inside of the processing tank 3 to process the high-pressure air. Second piping 1 for discharging to the outside of tank 3
0, the pipe 9 is provided with a discharge valve V ₂ , and the pipe 10 is provided with a discharge valve V ₄ .

11 is a pressure switch attached to the processing tank 3, and 12 is a pressure gauge.

The high pressure air stored in the air tank 2 is supplied to the processing tank 3 via the high pressure air supply piping 5. As soon as the pressure inside the processing tank 3 reaches a set value (for example, 5 kg/cm ² G) of the switch 11 attached to the processing tank 3, the discharge valve V ₂ is suddenly opened. When the discharge valve V ₂ is suddenly opened, the air in the internal space of the inner tank 8 is first discharged, and the resulting pressure difference between the inside and outside of the object to be processed causes the high pressure outside the object to be processed 7 to be discharged. Air also passes through the object 7 and flows inward while being accompanied by a rapid flow pressure, and then is discharged to the outside from the pipe 9 through the discharge valve V ₂ . Due to this action, the water contained in the object to be treated is squeezed out, separated from the object, and discharged to the outside, thereby being dehydrated.

It is also possible to further increase the dehydration efficiency by repeating this pressure dehydration step (that is, the step of flowing high-pressure air from the outside to the inside of the object to be treated) multiple times.

Then, after the pressure dehydration process is finished, the supply valve V ₁ and the discharge valve V ₂ are closed, and the air supply valve V ₃ and the discharge valve are closed.
Open _V4 . Since the high-pressure air supply pipe 6 communicates with the internal space of the inner tank 8, the high-pressure air supplied from the air tank 2 flows from the inside of the object 7 to the outside and communicates with the inside of the processing tank. It is discharged to the outside via the pipe 10 and the discharge valve _V4 attached thereto.

Through this treatment, the non-uniformity of water content that conventionally occurred inside and outside of the object to be treated 7 is corrected, and
The moisture content can be made uniform as a whole.

〔Effect of the invention〕

According to the processing method and apparatus of the present invention as described above, it becomes possible to equalize the amount of water contained in the processed material after pressure dehydration, and as a result, in the drying process in the next step, it becomes possible to make dry spots uniform. It is possible to solve this problem and shorten the drying time, thereby saving heat energy.
Therefore, the present invention realizes great work efficiency and energy savings in processing fiber materials.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing an example of a pressure dehydration apparatus according to the present invention. 1...Compressor, 2...Air tank, 3...
Processing tank, 5, 6... High-pressure air supply piping, 8... Inner tank for holding objects to be treated, 9, 10... Exhaust piping.

Claims (1)

[Scope of Claims] 1. A dehydration valve that is attached to a sealed processing tank that is equipped with an inner tank for holding objects to be processed and that is connected to an internal space of the inner tank for holding objects to be processed. is closed and high-pressure air is supplied into the sealed processing tank to maintain the pressure in the sealed processing tank and the internal space of the inner tank for holding the processed material at a constant high pressure. The dewatering valve is suddenly opened to rapidly discharge the high-pressure air in the internal space of the inner tank for holding the material to be processed, thereby creating a pressure difference between the inside and outside of the material to be processed, causing a sudden drop in the material to be processed. Applying a fluid pressure to dehydrate the water in the object to be treated, and then backflowing high-pressure air from the inside to the outside of the object to be treated,
A pressure dehydration method characterized by equalizing the moisture inside and outside the object to be treated. 2. A sealed processing tank into which an inner tank for holding the processed material is loaded, a first high-pressure air supply piping for supplying high pressure air into the sealed processing tank, and a first high-pressure air supply pipe for supplying high pressure air into the sealed processing tank, and the processing material holding inner tank. a second high-pressure air supply pipe for supplying high-pressure air into the internal space of the inner tank for holding objects; and a first exhaust pipe for discharging air from the internal space of the inner tank for holding objects to be treated. , and a second exhaust pipe for discharging the air in the sealed processing tank, and each pipe is provided with an air supply valve or an exhaust valve, and in step 1, the first exhaust pipe is provided with an air supply valve or an exhaust valve. A first air supply valve attached to the supply pipe and a first exhaust valve attached to the first exhaust pipe are simultaneously opened, and a second air supply valve attached to the second supply pipe is opened. The valve and the second exhaust valve attached to the second exhaust pipe are closed simultaneously, and in the next step, the first air supply valve and the first exhaust valve are simultaneously closed and the A pressure dewatering apparatus characterized in that a second air supply valve and the second exhaust valve are opened at the same time.