JPH01270909A - Defoaming deaerating device - Google Patents

Abstract

PURPOSE:To efficiently perform defoaming and deaeration of liquid by providing a defoaming and deaerating mechanism made of a gas-permeable and liquid- impermeable film or tube connected with a decompressing mechanism in the inside of a closed tank. CONSTITUTION:A defoaming deaerator is formed by providing an introduction port 11 and a discharge port 12 of liquid to a closed tank 1 and providing a discharge port 6 and a discharge part 5 of gas. The discharge part 5 is connected with a vacuum mechanism in one hand and connected with a tube 2 wherein only gas is allowed to permeate therethrough in the tank 1. The tube 2 is wound on a supporting member 4 and immersed in liquid. Further such a constitution may also be utilized that a film material wherein only gas is allowed to permeate through the surface is coated around the supporting member 4 instead of the tube 2. Therefore the gas existing in liquid can be properly removed by holding the film or the inside of the tube at reduced pressure.

Description

Detailed Description of the Invention ``Object of the Invention'' The present invention relates to a defoaming and degassing device, which is capable of efficiently defoaming and degassing bubbles or dissolved gases contained in general liquids, high viscosity liquids, etc. The aim is to provide equipment.

(Industrial Application Field) A device for defoaming and degassing air and other gases contained in bubbles or dissolved in liquids that have a certain viscosity such as general liquids or high viscosity liquids.

(Prior Art) Defoaming and degassing of bubbles or dissolved gases contained in a liquid, particularly a highly viscous liquid, has been carried out to some extent in the past. In other words, such a defoaming and degassing method involves storing liquid in a tank and reducing the pressure in the space above the tank.In some cases, in addition to this pressure reduction, stirring and/or heating of the liquid may be performed. It is to be used together.

(Problem to be solved by the invention) However, the conventional method as described above is not efficient.

In other words, even if a reduced pressure condition is created, only the surface area is in contact with the reduced pressure atmosphere, and most of the main liquid in the tank cannot be effectively degassed and degassed. Therefore, stirring and heating are not necessary. Specifically, however, since the degassing and degassing are performed at the liquid surface, degassing and defoaming cannot be effectively carried out inside the liquid.

"Structure of the Invention" (Means for Solving the Problems) A defoaming and degassing mechanism is provided in a closed tank, in which a gas-permeable and liquid-impermeable film or tube is deployed and disposed on a supporting body. A defoaming and degassing device characterized in that a foam degassing mechanism is connected to a pressure reducing mechanism to reduce the pressure inside the film or tube.

(Function) By deploying a gas-permeable and liquid-impermeable film or tube to the support body, the film or tube is set to have as large a contact area as possible with the liquid in the tank. . By reducing the pressure within the film or tube set as described above using a pressure reducing mechanism, gas existing in the liquid, particularly in the middle and deep parts of the liquid layer, is appropriately removed to defoam and degas.

The support body as described above can be rotated or moved as appropriate in the liquid.

(Example) To explain the specific embodiment of the present invention shown in the attached drawings, the general relationship of the equipment according to the present invention is as shown in FIG.
A tube 2 that allows only gas to permeate is wound around a support body 4 that is appropriately branched as shown in FIG. The end of the tube 2 is connected to the section 5, and the exhaust section 5 is connected together with an exhaust port 6 formed in the tank 1 to a vacuum mechanism such as a vacuum pump or a vacuum tank.

The tube 2 described above may be made of a film material 7 as shown in FIG. 3 or 4. That is, countless perforations 8 are provided, and the surface of the support body 4 formed in a case shape is covered with a film material 7 that allows only gas to pass through but not liquid. The exhaust part 5 is formed in the same manner as shown in FIG. 2 and is attached to the tank 1.

When the above-mentioned tube 2 or film material 7 is concerned with defoaming and degassing efficiency, it is preferable to use a material with a porous structure, that is, a synthetic resin film material, particularly a polytetrafluoroethylene film, is preferably rolled or stretched. It is preferable to use one in which the structure is uniformly fibrillated and micropores are formed between the fibers. Especially in stretched porous materials made of polytetrafluoroethylene, the average pore diameter is 0.02 to 1.
It is possible to stably obtain a material with a porosity of about 25 to 95% with a diameter of about 5 μm, and such tubes or film materials do not allow liquids to pass through, but effectively pass through gases that tend to pass through the bones, allowing for efficient removal. Foam can be degassed. In addition, the tetrafluoroethylene resin material has excellent chemical resistance and heat resistance, so it can be widely used for a wide variety of liquids. However, the present invention is of course not limited to these specific materials, but may be any other gas-permeable but liquid-impermeable material. For example, even if it is a solid body, fluororesins such as polytetrafluoroethylene and silicone resins have the property of allowing only gas to pass through and not liquids, and their tubes or film materials can be used in the same way as above. Even if such a solid body is slightly inferior in defoaming and degassing efficiency, it is preferable in terms of liquid impermeability and gas selective permeability.

It is clear that the case-like support member 4 provided with the perforations 8 as described above may be formed of a net-like material made of braided wire instead of a plate-like material with perforations. Further, a stirring blade may be used in combination, but as shown in the figure, a blade formed in a branched or flat case shape may be rotated or moved within the tank.

"Effects of the Invention" According to the present invention as explained above, it is possible to effectively remove gas inside the liquid stored in the tank, even in the deep layer, and to perform degassing and degassing, thereby achieving efficient degassing. This invention is industrially very effective because it allows for effective defoaming and degassing.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, and FIG. 1 is a cross-sectional explanatory diagram showing the general equipment configuration according to the present invention, and FIG. 2 is an example of the defoaming and degassing mechanism. Front view,
FIG. 3 is a front view of another example, and FIG. 4 is a sectional view thereof. In these drawings, 1 is a closed tank, 2 is a tube that allows only gas to pass through, 3 is a liquid to be treated, 4 is a support body, 5 is an exhaust part, 6 is an exhaust port, 7 is a film material, and 8 is a perforation. This shows that. Patent applicant: From Japan Gore-Tex Co., Ltd.
Akira Shiba 1) Yoshihikodo
Yoshihiro Chikamori Dai'Jen
4th round/Iil No. 211i1

Claims (1)

[Claims] A defoaming and degassing mechanism in which a gas-permeable and liquid-impermeable film or tube is deployed and arranged on a support body is provided in a closed tank, and the defoaming and degassing mechanism is connected to a pressure reducing mechanism to remove the film or tube. A defoaming and degassing device characterized by reducing the pressure inside.