JPS62132509A - Foam removing device - Google Patents

Abstract

PURPOSE:To eliminate the need for providing valves to a piping in which liquid passes and to make handling simple by fixing a gas-liquid separating membrane tube forming a flow passage for liquid to be treated so as to inscribe the inside wall surface of a vacuum chamber mounted with a cooler. CONSTITUTION:Cooling water 8 is supplied to cool the entire part of the cooling vacuum chamber 16 and the gas-liquid separating membrane tube 15. A vacuum pump 9 is then operated to evacuate the inside of the cooling vacuum chamber 16 to <=600mmHg vacuum. A soln. 1 is supplied from a soln. supply port 3 to the gas-liquid separating membrane 15 upon ending of the operation. The soln. of a treating agent past the tube 15 is drawn through a soln. discharge pipe 5. The gaseous particles forming foam permeates the gas-liquid separating membrane and are discharged to the outside of the soln. when the soln. 1 pass the tube 15. The gas having a relatively large mol.wt. is cooled with progression of the soln. and is dissolved into the soln., by which the foam is finally removed.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to trace analysis of impurities and dust in solutions or pure liquids, and (a bubble removal device V ( related.

[Conventional technology]

FIG. 2 is a cross-sectional explanatory view showing a conventional bubble removal device in a solution, for example, in the figure, (1) is a solution, and (2) is a device for supporting and degassing this solution (1). Solution tank, (3
) is a solution supply pipe for completely supplying the solution (1) to the solution tank (2), (4) is a solution supply pulp, (5) is a solution discharge pipe, and (6) is a solution discharge pulp. (7) is a cooler attached to the side wall of the solution tank (2), and (8) is cold water for cooling. (9) is a vacuum pump to prevent pressure inside the solution tank (2), αO is a vacuum pump (9)
) Vacuum pump piping connected to solution tank (2), (1υ
is pulp for a vacuum pump, (1z is a vacuum pump exhaust port, (I3) is a pressurizing gas pipe used to make the inside of the solution tank (2) positive pressure, (14 is a pressurizing gas pulp).

Next, the operation will be explained. First, the pulp for discharging the solution (
6), Pulp 0υ for vacuum pump, gas valve α4 for pressurization
) After closing, open the solution supplying pulp (4) and supply the solution (1) to the solution tank (2). Once the solution (1) has adequately filled the solution tank (2), the solution supply pulp (4)
Close it. Next, fully supply the cooling water (8), operate the cooler (power) to cool the solution (1) in the solution tank (2), and cool the solution (1) in the solution tank (2).
1) Incorporate the air bubbles in the solution (1). At the same time as this operation, the vacuum pump (9) is also activated, the vacuum pump pulp συ is opened, the inside of the solution tank (2) is made pressure-proof, and the solution (
1) Remove the air bubbles inside by exhausting. In this state, when the volume of solution (1) is 500 cc to 100 cc, leave it for 60 minutes or more.

After the above procedure is completed, the vacuum pump valve αυ is closed, the pressurizing pulp (14) is opened, and the inside of the solution tank (2) is brought to positive pressure. Any inert gas may be used as the pressurizing gas, but for example, in the case of dry air, a gas with a pressure of 6 liters or more is used. After supplying the gas in this manner, the pulp for discharging the solution (6) is gradually opened, and the solution (1) is completely discharged and collected.

[Problem that the invention seeks to solve]

In the conventional solution bubble removal apparatus configured as described above, the bubble removal operation from the solution is performed in a batch manner, and the solution cannot be used continuously for long periods of time for purposes such as analysis. For example, it is impossible to continuously monitor fine particles in pure water using this device. However, since the solution is directly affected by dust generated from the solution supply valve, solution discharge valve, and pressurizing gas pulp, there is a high possibility of solution contamination. Furthermore, unless a high-purity gas is used for pressurization, the solution will be contaminated. Since contamination from the components of the device itself cannot be avoided, this device is not suitable as a bubble removal device for performing trace analysis of solutions and the like.

This invention was made to solve the above-mentioned problems, and it is possible to continuously perform the operation of removing bubbles from the solution, etc., and there is no contamination of the solution or sample due to various operations of the device. An object of the present invention is to obtain a bubble removing device capable of efficiently removing bubbles.

[Means to solve all problems]

The bubble removal device according to the present invention includes a vacuum chamber equipped with a cooler, and a gas-liquid separation membrane tube that is inscribed and fixed on the inner wall surface of the vacuum chamber and forms a flow path for a liquid to be treated. It is something that

[Effect]

The gas-liquid separation membrane tube in this invention is internally enclosed in a vacuum chamber, and the inside of the vacuum chamber is maintained at reduced pressure by, for example, a vacuum pump, so that when the liquid passes through the gas-liquid separation membrane tube, the liquid Due to the aeration effect on the gas with a small molecular weight contained therein, the bubble-like gas is gradually exhausted, and the bubbles are removed at the outlet of the gas-liquid separation membrane tube.

In addition, the cooling efficiency of the liquid in the gas-liquid separation membrane tube is increased by the cooler installed in the vacuum chamber, and air bubbles in the liquid with a relatively large molecular weight that are not removed by the gas-liquid separation membrane tube are occluded. ) phenomenon, it is dissolved in the liquid and absorbed.

Moreover, the above-mentioned action makes it possible to continuously remove air bubbles from the liquid, and because there is no need to use pressure pulp in the liquid flow path, it is possible to completely avoid contamination on the sample, that is, the liquid to be treated. It will be done.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is a solution, but from an analysis standpoint, it is a sample liquid. (The tube is a gas-liquid separation membrane tube, through which the medium solution (1) passes at a constant flow rate.

(3) is a solution supply pipe, (5) is a solution discharge pipe,
The gas-liquid separation membrane tube (connected to the country) (16) is a cooling vacuum chamber, and the spiral gas-liquid separation membrane tube (16) is a cooling vacuum chamber.
151 is a cooling vacuum chamber (19 installed on the inner wall surface. (8) is cold water for making the cooling vacuum chamber (lfjI function as a cooler). (9) is a cooling vacuum chamber? αO is a vacuum pump piping that connects the vacuum pump (9) and the cooling vacuum chamber αυ. α is the exhaust port of the vacuum pump.

Next, the operation will be explained. First, the cooling vacuum chamber u
In order to make the odor function, cooling water (8) is supplied to cool the entire cooling vacuum chamber (16) and the gas-liquid separation membrane tube α5. Next, the vacuum pump (9) is fully activated to cool the inside of the cooling vacuum chamber 116). Make the vacuum below 600w+Hg. After this operation is completed, the entire solution (1) is supplied from the solution supply port (3) to the gas-liquid separation membrane tube Kasumi, and the treated solution that has passed through the gas-liquid separation membrane tube is discharged from the solution discharge pipe (3).
5) After that, the solution (1) is collected as a liquid to be treated.

In the solution thread path as described above, when the solution (1) passes through the gas-liquid separation membrane tube 05, gas molecules forming bubbles permeate through the gas-liquid separation membrane and are discharged out of the solution. That is, the gas-liquid separation membrane tube (15) is formed of a thin film of Teflon, for example, and this membrane allows gas molecules with small molecular weight, such as I-i+He+N, , 02, etc., to permeate, but these Gas molecules and solution molecules that have a larger molecular weight than gas do not pass through. Therefore, bubbles formed by gas with a small molecular weight are discharged out of the solution (1) through the gas-liquid separation membrane tube (19). As the solution (1) cools as the solution progresses, the bubbles gradually become occluded (
0eC-1ude) and will be injected into the melt.

This action acts on the solution (1) that is continuously passing through the gas-liquid separation membrane tube, and finally the solution from which air bubbles have been completely removed is sent to the solution discharge pipe (5) as the solution to be treated. be discharged.

In addition, in the above embodiment, the cooling function of the cooling vacuum chamber (16) uses a water cooling method using cold water. Although this example was used, a device having other cooling functions such as electronic cooling may be used, and the same effects as in the above embodiment can be obtained. In addition, in the above example, Teflon was used as the material for the gas-liquid separation membrane tube (lω), but any material can be used as long as it has similar characteristics and is not likely to contaminate the liquid. It goes without saying that even a thin film tube of A similar effect can be expected for a pure liquid of a single substance that has no reactivity with membranes or the like.

〔Effect of the invention〕

As described above, according to the present invention, there is no need to use any pulp in the piping through which the liquid passes, so there is no liquid contamination due to the manipulation of pulp, and the device configuration can be simplified, and handling and maintenance can be simplified. became very easy. This makes it possible to continuously remove bubbles from the liquid to be treated.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view showing an apparatus for removing bubbles in a solution according to an embodiment of the present invention, and FIG. 2 is an explanatory cross-sectional view showing a conventional apparatus for removing bubbles in a solution. In the figure, (1) is a solution, a9 is a gas-liquid separation membrane tube, and Q6) is a cooling vacuum chamber. Note that the same reference numerals in each figure indicate the same or similar parts. Agent Patent Attorney Tadashi Sato Figure 1 1゜

Claims (1)

[Claims] A bubble removal device comprising: a vacuum chamber equipped with a cooler; and a gas-liquid separation membrane tube that is inscribed and circumferentially attached to the inner wall of the vacuum chamber and forms a flow path for a liquid to be treated. .