JPS59213412A - Apparatus for removing carbon dioxide in water - Google Patents

Abstract

PURPOSE:To remove efficiently gaseous carbon dioxide in a short time by dispersing compressed air, which is atomized through a porous partition wall, into water to bring the air into close contact with water. CONSTITUTION:By driving a blower 5 and opening a valve 10, the compressed air is introduced into a bubbling chamber 2, and atomized through a partition wall 4 to bubble the water flowing down to the surface of the chamber. The bubbles are pressed and moved in the bubbling chamber 2 in the flowing direction of the air current to the side of an overflow wall 11. The bubbles, overflowed from the overflow wall, are separated into the air contg. gaseous carbon dioxide and the water in a gas-liquid separation chamber 12. The sending pressure of the air to be supplied is set strong enough, and the amt. of air is set to be enormous as compared with the water supply to a water spouting tube 8. A port is provided to the ceiling of the gas-liquid separation chamber 12 to discharge the separated air to the outside. The water after treatment is discharged from a discharge port 14 to a water storage tank 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is primarily concerned with the removal of carbonation from water, which is carried out as a pre-treatment, for example, for the purpose of converting tap water into drinkable water by electrolysis or electroosmosis. It is related to the device.

Generally, groundwater and river water contain a large amount of carbonic acid called free carbonate. The origin of this carbonic acid is usually carbon dioxide gas dissolved in rainwater, but it is also carbon dioxide gas generated in the soil by the respiration of living organisms and the decomposition of bacteria. And the relationship between dissolution and dissociation of carbon dioxide gas is ``02 + H202H, C05 (carbonic acid) H, CO3
: H+ + Hco; - HCo, : H+ -1-CO.

Therefore, even if a large amount of hydroxyl groups are generated in the water on the cathode chamber side by electrolytic action, the hydroxyl groups will be separated into H+ and HCO,- or H+ and COv, and the hydroxyl groups will become OH-+ H+→H,0. Since it is consumed, the electrolytic efficiency will be significantly reduced.

In addition, when electrolysis is applied, useful calcium ions gather on the cathode chamber side, but the above carbonic acid shows a reaction of H2CO, -1-Ca - + H, -1-CaC0°, and becomes calcium carbonate. As a result, it precipitates or adheres to the electrode surface as a scale, lowering the current conduction rate, which also has the disadvantage of consuming Ca.

Therefore, a method was adopted in which air was blown into the water to create foam and remove carbon dioxide gas. child\
This takes advantage of the fact that the degree of gas solubility in water is constant depending on the conditions (atmospheric pressure and temperature), and by substituting carbon dioxide gas with air, the amount of dissolved GANO carbonate is substantially reduced. In this specific method, air is supplied through a plate with many holes at the bottom of the aquarium, and the air rises in the form of bubbles through the water in the aquarium, and is brought into contact with the water on the surface of the bubbles. There are some that achieve replacement of carbon dioxide gas in water. However, with this method, the amount of air supplied relative to the amount of water is small, and the air bubbles are large.
Since a sufficient surface area for contact with the outside air and liquid is not obtained, the expected carbon dioxide removal cannot be achieved.

The present invention was made based on the above circumstances, and in a situation where fragmented pressurized air is ejected through a porous partition wall, water is diffused along the partition wall and all the water is removed. It is an object of the present invention to provide a device for removing carbon dioxide from water, which achieves a high degree of air contact by foaming the water, thereby effectively removing carbon dioxide gas in a short period of time.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, the symbol l is an internal device main body,
A foaming chamber 2 is provided in the center, and a pressurized air supply chamber 3 is provided at one end.

One end side of the foaming chamber 2 is provided with a ventilator, such as the product name "Norucon" made by unglazed or semi-molten aggregate of fine particles of synthetic resin, so as to separate it from the pressurized air supply chamber 3. A porous partition wall 4 having pores such as a porous plate or the like is provided, and finely divided pressurized air is supplied from the pressurized air supply chamber 3 into the bubbling chamber 2 through the partition wall 4. . The pressurized air supply chamber 3 is connected to a blower 5, and a heater 7 such as an electric heater is provided at a communication point 6 between the blower 5 and the pressurized air supply chamber 3.

On the other hand, above one end side of the whisking chamber 2, a fountain pipe 8 is arranged corresponding to the width of the whisking chamber 2, and a fountain pipe 8 is provided through nozzles 9 arranged in parallel in the longitudinal direction of the fountain pipe 8. The partition wall 4
In the opposite direction, water is diffused and released.

The fountain pipe 8 is connected to tap water (not shown) via a solenoid valve lO. In addition, an overflow wall 11 is provided at a distance from the fountain pipe 8, for example, on the opposite side of the whisking chamber 2.
A gas-liquid separation chamber 12 is connected to the gas-liquid separation chamber 12 via a gas-liquid separation chamber 12, and a discharge port 14 to a water storage tank 13 is opened at the bottom of the gas-liquid separation chamber 12.

In such a configuration, by driving the blower 5 and opening the solenoid valve 10 (this can be done manually, but it can also be done automatically by a signal from a level detector installed in the water tank 13, etc.). (good), the pressurized air is subdivided (2
When entering the foaming chamber 2, the water flowing down onto its surface is foamed. This foaming is suppressed and moved in the direction of air flow in the foaming chamber 2, and is pushed toward the overflow wall ll side. Then, at a position beyond the overflow wall, air containing carbon dioxide gas and water from which carbon dioxide gas is removed are separated in a gas-liquid separation chamber 12.

And, even if the pumping force of the above-mentioned supply air is
Even if water remains inside, the water bubbles flowing from the partition wall 6 to the gas-liquid separation chamber 12 are set so strongly that they are not obstructed by the water, and the amount of water supplied to the fountain pipe 8 is The air volume is set to match the amount of air.

In this embodiment, there is an opening in the ceiling of the gas-liquid separation chamber +2tj, and the separated air is discharged to the outside.

The treated water is discharged from the outlet 14 into the water storage tank 13.

Although this embodiment has been described with respect to tap water, it goes without saying that it can also be applied to sewage treatment.

The present invention has been described in detail above, and includes a whisking chamber provided with a porous partition wall on one end side, a means for diffusing supply water along the partition wall, and a means for pumping air into the whisking chamber through the partition wall. and a means for extracting water bubbles formed by dispersion of water after growing in the bubbling chamber and separating gas and liquid. The foam is finely whipped, sent sequentially to enlarge the bubbles, and finally released to separate the gas and liquid.

For this reason, unlike the method of blowing air into water, the amount of air contact per area is enormous, and the carbon dioxide contained in the water is taken out into the air and replaced with air, reducing carbon dioxide emissions. Can be done significantly.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional side view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional plan view thereof. 1... Apparatus body, 2... Foaming chamber, 3... Pressure air supply chamber, 4... Partition wall, 5... Blower, 6... Communication portion, 7... Heater, 8... ... Fountain pipe, 9... Nozzle, 11... Overflow wall. Applicant Ryu Okazaki Supplemental Replacement (Method) 1. Display of the matter 1988 patent O+6486388 2 Name of issue 1! 3.Relationship with 4 cases of Nagisa to be corrected %Kyoda U residence 73T 2-7-18-4 Nishi, Kamifukuoka City, Saitama Prefecture
Date of amendment order: August 30, 1982 (Issuance 1st day) & Subject of amendment above)

Claims (1)

[Claims] a whisking chamber having a porous partition on one end; means for dispersing supplied water along the partition; means for pumping air into the whisking chamber through the partition; and bubbles formed by dispersion of water. An apparatus for removing carbonic acid from water, characterized in that the device comprises means for growing the water in the bubbling chamber and then extracting it to separate gas and liquid.