JPS59213410A - Apparatus for removing carbon dioxide in water - Google Patents

Abstract

PURPOSE:To remove efficiently carbon dioxide by spouting compressed air which is atomized through a porous partition wall, supplying dispersed water to the surface of the partition wall, and bubbling all the water to enhance the gas and liquid contacting efficiency. CONSTITUTION:A porous partition wall 6 is provided at the top of a compressed air supplying chamber 5, and the air is sent with pressure through a blower 9, a heater 10, and a duct 7. The air, atomized through the partition wall 6, is supplied into a bubbling chamber 2. A water stream is spouted and dispersed from a port 11a of a water supply pipe 11 facing the partition wall 6 to cause bubbling. The sending pressure of the air to be supplied is set so that the amt. of the air may become enormous as compared with the amt. of the water to be dispersed. All the supplied water is made into foam, and goes upward. The water diverges from the ascending air current at the level of a port at the upper end of an overflowing cylinder 13 in a gas-liquid separation chamber 3, and flows down into a water storage chamber 4 through the overflow pipe 13. At this stage, the water foam is broken, and the air contg. CO2 is discharged to the outside from the duct 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water carbonation removal device that is carried out, for example, as a pretreatment, mainly for the purpose of converting tap water into drinkable water by electrolysis or electroosmosis. It is related to.

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 that is generated in the soil through the respiration of living organisms and the decomposition of bacteria. The relationship between dissolution and dissociation of carbon dioxide gas is CO□+H,0: H2CO, (carbonic acid) H2CO3-;
H++ l-1covHCO, -2H+ 4- C
O,-.

Therefore, even if a large amount of hydroxyl groups are generated in the water on the cathode chamber side due to the 'rvts action, they are separated into H0 and HCO,- or 1]+ and CO,-, and OH+H+ →
H20 and hydroxyl groups are consumed and shredded, resulting in a significant drop in electrolytic efficiency.

In addition, when electrolysis is applied, useful calcium ion forces gather on the cathode chamber side, but the above carbonic acid
), shows the reaction, becomes calcium carbonate and precipitates,
Alternatively, it adheres to the electrode surface as scale, reducing the current conductivity. For this reason, it also has the disadvantage of consuming Ca.

Therefore, a method was adopted in which air was blown into the water to create bubbles and remove carbon dioxide gas. child\
Taking advantage of the fact that the degree of gas solubility in water is constant depending on conditions (pressure and temperature), the amount of dissolved carbon dioxide is substantially reduced by replacing carbon dioxide with air. 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 bubbles are large.
Since a sufficient gas-liquid contact surface area is not obtained, the expected carbon dioxide removal cannot be achieved.

The present invention was developed based on the above-mentioned circumstances, and by dispersing and supplying water to the porous partition wall under the condition where fragmented pressurized air is ejected through the partition wall, The aim is to provide a water carbonation removal device that foams all of the water to achieve a high degree of air contact, thereby effectively removing carbonation in a short period of time. be.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes a cylindrical main body of the apparatus, in which a bubbling chamber 2 and a gas-liquid separation chamber 3 are arranged adjacent to each other in the upper part, and a water storage chamber 4 is installed in the lower part. The foaming chamber 2 is provided with a pressurized air supply chamber 5 at its bottom, and the top of the pressurized air supply chamber 5 is made by unglazing or semi-molten agglomeration of fine particles of synthetic resin. A ventilation porous plate such as "Palcon" and other porous partition walls 6 having countless pores are added. In addition, the pressure air supply chamber 5
An air duct 7 is provided on one side of the apparatus body 1, and this air duct 1-7 communicates with an air chamber 8 formed in the JJ'i section of the main body 1 of the apparatus. A discharge port of a blower 9 is open in the air chamber 8, and pressurized air is introduced into the air chamber 8 by driving the blower 9, and is supplied to the pressurized air supply chamber 5 via the duct 7. It looks like this. In this embodiment, the air chamber 8 is provided with an electric heater 10 to heat the supplied air.

An opening 0112 of the water supply pipe 11 is located at the lower part of the whisking chamber 2, facing the partition wall 6, and the water supply pipe 11 is connected to the water pipe (Fig. (not shown)
(Connected with.

Also, in the boundary area between the whisking chamber 2 and the gas-liquid separation chamber 3, an overflow tube 13 is provided which sets the actual height of the whisking chamber 2. +3 is open at its upper end, and this overflow tube 13.1.3 communicates at its lower end with the water storage chamber 4. Further, a duct 14 is provided at the top of the gas-liquid separation chamber 3.
The duct 14 is bent in an L-shape, and the bend 1~
An opening 14a is provided on the lower surface of the horizontally extending end so that the air (including carbon dioxide gas) separated in the gas-liquid separation chamber 3 can be discharged to the outside.

Note that a suitable filter element 15 is provided to prevent dust from entering from the outside.

A supply pipe 16 for supplying treated water to the electrolyzer is connected to the water storage chamber 4 .

In addition, in the figure, the reference numeral 17 is a liquid level detector for the water storage chamber 4, and four level sensors 17a, 1.7b, and 17
There is C,,17d.

Next, the operation of this device will be specifically explained. When the water level in the water storage chamber 4 falls below the level sensor 17b, the switch is turned OFF.
The bar number is detected by the level detector 17, the prower 9 is driven in response to the drive signal, and the solenoid valve is opened in response to the open signal. As a result, the segmented air flow enters the whisking chamber 2 through the partition wall 6, but on the partition wall 6,
Since a water stream is ejected and diffused from the water supply pipe 11 through the opening 11a, foaming occurs. Since the air flow rate is enormous compared to the amount of water supplied, the occurrence of bubbles is significant, and all of the supplied water rises in the form of bubbles. The bubbles are fine at first, but as the deterrent force of the bubbles on the -F side decreases during the rising process, the bubbles expand and grow in the process of going to the gas-liquid separation chamber 3 on the -H side. In particular, when the air is heated as in this example, its growth is easily achieved. In the gas-liquid separation chamber 3, the air separates from the rising air flow (rising as water bubbles) at the level of the upper end openings of the overflow tubes 13, 13, flows to the overflow tube 13°13, and flows from the overflow tube to the water storage chamber 4. flows down to.

Then, the water bubbles burst just before entering the overflow tube, during the process of flowing through the overflow tube, or after entering the water storage chamber 4, and the air containing carbon dioxide gas is released from the gas-liquid separation chamber 3 to the outside via the duct 14. Ru. In this case, if the water source is tap water, it is convenient because the action of removing chlorine gas is also achieved at the same time.

When the water level in the water storage chamber 4 reaches the level sensor 173, a signal enters the level detector 17 to stop the blower 9,
Close the solenoid valve. Note that the level sensors 17c and 17d are used for other purposes, so they will not be explained here.

Note that in this embodiment, water was sprayed and diffused from the opening of the water supply pipe 11 toward the partition wall, but various considerations may be made as necessary to achieve sufficient generation of water bubbles. By the way. Furthermore, the feeding force of the supply air is such that even if water remains in the bubbling chamber 2, bubbling in the region from the partition wall 6 to the upper gas-liquid separation chamber 3 is impeded by the surrounding residual water. It is set to have such strength that it does not exist, and it is set to have a large amount of air.

Further, in this embodiment, the water storage chamber 4 is configured integrally with the bubbling chamber 2 and the gas-liquid separation chamber 3, but they are configured separately, and the overflow tube 13
, 13. Further, although a cylinder is used for overflow in this embodiment, it goes without saying that a plate-shaped overflow wall may also be used. Further, the gas-liquid separation means for separating water and air from water bubbles is provided in the gas-liquid separation chamber 3.
It is defined here as functioning in all areas where water bubbles break and water and air (which already carries carbon dioxide gas) are separated, such as in the overflow tube 13 and the water storage chamber 4.

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

As described in detail above, the present invention provides means for force-feeding air into a foaming chamber through a porous partition wall, a water supply means for dispersing and supplying water to the partition surface in the foaming chamber, and a dispersion of water. and gas-liquid separation means for separating the bubbles formed by the foaming chamber into a gas-liquid axiom after the bubbles are grown in the bubbling chamber,
The above-mentioned air pumping force is adjusted to the water supply amount of the water supply means so that it has at least enough strength to prevent foaming in the region from the partition wall to the gas-liquid separation means in the foaming chamber from being obstructed by surrounding water. Unlike the method of blowing air into the water, the water that is sequentially diffused and supplied to the partition wall is
All of the water grows in the form of bubbles and rises, increasing the amount of air contact per area, and the carbon dioxide contained in the water is taken out into the air and replaced with air, resulting in significant carbon dioxide emissions. In addition, in the present invention, by heating the air, the above-mentioned foaming effect is further improved, the replacement of carbon dioxide gas with air is improved, and the effect of removing carbonic acid from water is improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional side view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional plan view thereof. ■...Device body, 2...Bubbling chamber, 3...Gas-liquid separation chamber, 4...Water storage chamber, 5...Pressure air supply, 6...Partition wall, 9...Blower, 11...・Water supply pipe, 13... Overflow tube. Applicant: Tatsuo Okazaki Procedural amendment (method) Patent Application No. 86386, dated September 13, 1988 2. Name of the invention: 3. Relationship with the case of the person making the amendment Patent applicant 4. Date of amendment order: August 30, 1980 (shipping date) 5. Subject of amendment (1) Drawing editor

Claims (1)

[Scope of Claims] A water supply means for dispersing and supplying water to the surface, and a gas-liquid separation means for separating the water bubbles formed by dispersing the water into the foaming chamber after the bubbles are grown in the foaming chamber, The above-mentioned air pumping force is adjusted to the water supply amount of the water supply means so that it has at least enough strength to prevent foaming in the region from the partition wall to the gas-liquid separation means in the foaming chamber from being obstructed by surrounding water. A water carbonation removal device characterized in that it is set in a relationship. (2) A means for pumping air into the whipping chamber through a porous partition wall, a means for preheating the pumped air, a water supply means for dispersing and supplying water to the partition wall surface in the whisking chamber, and and gas-liquid separation means for separating the formed water bubbles into gas and liquid after growing in the foaming chamber, and the air pressure is applied at least to the foaming chamber.
It is characterized by being set in relation to the water supply amount of the water supply means so that it has enough strength to not be hindered by surrounding water from bubbling in the region from the partition to the gas-liquid separation means. Water carbonation remover. (3) The whisking chamber communicates with the gas-liquid separation means at a height sufficient to allow the desired growth of fine water bubbles, the partition wall is located at the bottom of the whisking chamber, and the water supply means is located at the bottom of the whisking chamber. Claim 1, characterized in that a water supply port is opened in the vicinity of the partition wall, and the gas-liquid separation means is provided with an overflow part for overflowing foam at the upper part of the whisking chamber. Water carbonation removal device. (4) The whisking chamber communicates with the gas-liquid separation means at a height sufficient to allow the desired growth of water bubbles, the partition wall is located at the lower part of the whisking chamber, and the water supply means is located at the lower part of the whisking chamber. A water supply port is opened in the vicinity of the partition wall (7) The gas-liquid separation means is provided with an overflow portion for overflowing the foam at the upper part of the whisking skewer. Water storage acid removal device listed in Section 2.