JP2005305443A - Deaerator and deaeration method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deaerator capable of flexibly responding to various amounts of treatment liquid, kinds of the treatment liquid, properties of the treatment liquid and a feed method of the treatment liquid by one deaerator. <P>SOLUTION: In the deaerator, three or more deaeration elements provided with a joint member having couplings connected to both ends and comprising one or two or more gas permeable tubes are arranged in one vacuum chamber. The deaerator is made to a deaerator characterized in that the deaeration element having three or more single liquid inlets of the deaeration elements and the deaeration element having liquid inlets connected in parallel are provided and the deaeration element having a single liquid outlet and the deaeration element having the liquid outlets connected in parallel are also provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a deaeration device and a deaeration method, and its purpose is to flexibly cope with various processing liquid amounts, types of processing liquids, properties of processing liquids, and processing liquid supply methods with a single deaeration device. It is an object of the present invention to provide a possible degassing apparatus and degassing method.

Generally, a degassing device used to remove a heat exchange element in a heat exchanger or a dissolved gas in a solution is a plastic degassing element in which a fluororesin joining member and a fluororesin tube are joined. It is manufactured by integrating them in a vacuum chamber made of metal, metal, or glass using a fixing jig.
As an example of such a deaeration device, for example, the one shown in FIG. 3 exists.
This deaeration device is constructed by connecting and fixing a deaeration element (A) made of a gas-permeable tube made of a fluororesin inside a vacuum chamber (C) by a joining member (B). The liquid to be supplied is supplied from a fluororesin tube connected to a deaeration device through a joint (D).
As a method of operating such a deaeration device, the processing liquid is added to the fluororesin tube while the vacuum chamber (C) is decompressed by a decompression device such as a vacuum pump connected to the suction port (E). A method of pumping liquid is common.

However, in the degassing apparatus as described above, when the supply amount of the processing liquid is large, a plurality of degassing apparatuses must be connected in parallel or in series in order to improve the degassing efficiency.
On the other hand, as a deaeration device capable of obtaining high deaeration efficiency even when the amount of treatment liquid supplied is large, a joining member (B) having a plurality of fitting portions as shown in FIG. 4 is provided in the vacuum chamber (C). A deaeration device in which a plurality of deaeration elements (A) are fixed and attached to the respective fitting portions is also used.
According to this degassing apparatus, although a large amount of processing liquid can be efficiently degassed with one apparatus, there are problems as described below.

First, since only one type of liquid can be degassed at a time, an attempt was made to simultaneously degas two or more types of liquids having different liquid properties (for example, viscosity, density, aqueous type and solvent type). In some cases, it was necessary to connect and use two or more deaerators.
In addition, when degassing high viscosity liquids, it is necessary to increase the tube diameter, shorten the tube length, or increase the number of tubes, but these changes can be made flexibly and easily. I couldn't.

  The problem to be solved by the present invention is that it is possible to deal with various amounts of processing liquid with a single deaeration device, and it is possible to simultaneously deaerate a plurality of types of processing liquids, and the difference in properties of the processing liquids. It is another object of the present invention to provide a versatile degassing apparatus and degassing method that can adapt to various supply methods and extraction methods of processing liquid.

According to the first aspect of the present invention, there are three or more deaeration elements composed of one or two or more gas permeable tubes in which a joining member having joints connected to both ends is provided in one vacuum chamber. There are provided deaeration devices in which the liquid inlets of three or more deaeration elements are connected in parallel with a single one, and the liquid outlets are also connected in parallel with a single one. It is related with the deaeration apparatus characterized by being provided.
The invention according to claim 2 relates to the deaeration device according to claim 1, wherein the processing liquid supplied to the liquid inlet connected in parallel with the single liquid inlet is of a different type.

  The invention according to claim 3 uses the deaeration device according to claim 1 to perform a deaeration process by supplying different types of processing liquids between a single liquid inlet and a liquid inlet connected in parallel. It is related with the deaeration method characterized by this.

  According to the present invention, it is possible to deal with various amounts of processing liquid with a single degassing apparatus, and it is possible to simultaneously degas a plurality of types of processing liquids, and the properties of the processing liquids It is possible to flexibly cope with the difference, and further, it has an excellent effect that it can be applied to various supply methods and extraction methods of the processing liquid.

Hereinafter, embodiments of a deaeration device and a deaeration method according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a reference example for explaining a basic configuration of a deaeration device according to the present invention.
The degassing device (1) of the reference example shown in FIG. 1 is composed of one vacuum chamber (2) and two or more degassing elements (3) disposed in the vacuum chamber (2). .
In the degassing apparatus (1) according to the present invention, the material of the vacuum chamber (2) is not particularly limited, and any material such as metal, plastic, glass, etc. can be used as appropriate. From the viewpoint of chemical resistance, when using a metal material, stainless steel is used. When using a plastic material, a fluororesin such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), It is preferable to use polypropylene resin (PP), polyethylene resin (PE), or the like.
In addition, the shape and size of the vacuum chamber (2) also includes a suction port (21) that can be connected to a decompression means such as a vacuum pump and a liquid inlet and a liquid outlet for allowing the processing liquid to pass through the deaeration element (3). There is no particular limitation as long as it has a mouth and can accommodate a required number of deaeration elements (3).

The deaeration element (3) is a gas in which one gas-permeable tube or two or more gas-permeable tubes are joined and integrated by fusion through a fluororesin powder having heat-fusibility at the end. It consists of a permeable tube bundle.
Specific examples of the material of the gas permeable tube include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), Examples thereof include, but are not limited to, ethylene-tetrafluoroethylene copolymer (ETFE) and polychlorotrifluoroethylene (PCTFE).
Further, the fluororesin powder having heat-fusibility is not particularly limited. Specifically, tetrafluoroethylene-hexafluoropropylene copolymer (FEP), polytetrafluoroethylene (PTFE), tetra Preferable examples include powders such as fluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and ethylene-tetrafluoroethylene copolymer (ETFE).

The deaeration element (3) is fixed in the vacuum chamber (2) via the joining member (5). The deaeration element (3) and the joining member (5) are fitted to the fitting part (51) via the fitting piece (6) such as a ferrule with the joining pieces (10) at both ends of the deaeration element (3). Then, the cap nut (7) is connected and fixed by screwing into the male screw portion (52), and the joining member (5) and the vacuum chamber (2) screw the nut (8) into the male screw portion (55). This is fixed by sandwiching the upper wall of the vacuum chamber (2) through the O-ring with the flange (53) and the nut (8).
A joint (9) for connecting a tube (not shown) for feeding the processing liquid into the deaerator (1) is screwed to the joining member (5), and between the joint (9) and the joining member (5). As shown in the figure, an O-ring is interposed. At this time, in order to prevent the joining member (5) from bulging, a tubular bulging prevention tool (4) is fitted to the outer periphery of the joining member (5).

  In the deaeration device according to the present invention, the degassing element (3) and the joining member (5) and the connection and fixing method between the joining member (5) and the vacuum chamber (2) are not limited to the illustrated examples. Any method can be appropriately employed as long as the connection portion is excellent in airtightness and the deaeration element (3) can be securely fixed in the vacuum chamber (2).

Examples of various methods of using the deaerator (1) having the above basic configuration are shown in FIG. 2 as a schematic diagram showing an embodiment of the present invention. In FIG. 2, the U-shape indicates the deaeration element (3), and the square shape indicates the vacuum chamber (2). An arrow (triangle mark) indicates the flow direction of the processing liquid.
FIG. 2 shows a case where the liquid inlets of the three deaeration elements are connected in parallel with a single element, and the liquid outlets are also connected in parallel with a single element. A degassing treatment can be performed without mixing a liquid with a large amount of treatment and another type of liquid with a small amount of treatment at the same time.

As described above, according to the deaeration device according to the present invention, since two or more deaeration elements are arranged in one vacuum chamber, one unit can be obtained by changing the connection form of each deaeration element. This degassing apparatus can flexibly cope with various processing liquid amounts, types of processing liquids, properties of processing liquids, and processing liquid supply methods.
In the above example, the number of deaeration elements is three. However, in the present invention, the number of deaeration elements is not limited as long as it is three or more. Further, the connection method between the deaeration elements is not limited at all, and various types of joints such as a tube for piping, L type, and T type may be appropriately used according to the connection method.

Hereinafter, the effect of the deaeration device and the deaeration method concerning the present invention is clarified more by showing the example of the deaeration device and the deaeration method concerning the present invention. In addition, this invention is not limited at all by this Example.
(Example)
Bundled 130 fluororesin gas permeable tubes with an inner diameter of 0.9 mm, outer diameter of 1.2 mm, and length of 3.5 m, and both ends were heat-bonded at 380 ° C. via PFA powder and joined together 2 were prepared, and each was used as a first deaeration element and a second deaeration element, and these deaeration elements were attached to a vacuum chamber to obtain a deaeration device as shown in FIG.
In the apparatus of FIG. 1, when the number of degassing elements is increased to three to form a degassing apparatus, and the treatment liquid (pure water) is supplied to the degassing apparatus by the method shown in a below, the degassing is excellent. The process could be done.
a. Two pipes on the inlet side of the deaeration element are connected in parallel using piping tubes and joints L type and T type, and the other one is connected alone, and the other two are connected in parallel on the outlet side as well. The treatment liquid was supplied as a book alone. (Connection form in FIG. 2)

  A single degassing device can be used as a degassing device and a degassing method that can flexibly cope with various processing liquid amounts, types of processing liquids, properties of the processing liquid, and processing liquid supply methods.

It is sectional drawing which shows the reference example for demonstrating the basic composition common to the deaeration apparatus which concerns on this invention. It is the schematic which shows the Example of the deaeration apparatus which concerns on this invention. It is sectional drawing of one Example of the conventional deaeration apparatus. It is sectional drawing of one Example of the conventional deaeration apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Deaeration apparatus 2 Vacuum chamber 3 Deaeration element 5 Joining member 9 Joint

Claims (3)

  A deaeration device in which three or more deaeration elements made up of one or two or more gas permeable tubes are provided in one vacuum chamber, each of which is provided with a joining member having joints connected to both ends. The liquid inlets of three or more deaeration elements are provided in parallel with a single element, and the liquid outlets are similarly provided in parallel with a single element. A deaeration device characterized by that.   The degassing apparatus according to claim 1, wherein the processing liquid supplied to the liquid inlet connected in parallel with the single liquid inlet is of a different type. A deaeration method using the deaeration device according to claim 1 to perform a deaeration process by supplying different types of processing liquids at a single liquid inlet and a liquid inlet connected in parallel.

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