TWI439425B - Gas dissolution mechanism - Google Patents

Description

Gas dissolution mechanism Field of invention

This invention relates to a gas dissolving mechanism such as chlorine gas or VOC gas.

Background of the invention

There is an application related to a wastewater treatment method and apparatus for biologically treating drainage such as sewage, excrement, factory drainage, or domestic drainage (Patent Document 1).

That is, the treatment method of the drainage containing organic matter such as sewage, excrement, factory drainage or domestic drainage is the most common activated sludge method for biological treatment of aerobic microorganisms. In the activated sludge process, the wastewater can be purified by decomposing the organic matter in the drainage by the activated sludge composed of various microorganisms. On the other hand, in this course, microorganisms use the organic matter in the drainage as a nutrient source to grow, proliferate, and die (sludge). One part of the sludged microorganisms is again decomposed by biological treatment, and part of it is formed as excess sludge.

Although the excess sludge has progressed to be reused as a soil-improving material or compost material, most of it is formed as industrial waste, so the reduction of excess sludge has become a major issue. Conventionally, the method for reducing the amount of excess sludge has been proposed. The above method is obtained by ozone-oxidizing and decomposing the organic sludge extracted from the final precipitation tank, and decomposing biologically by aerobic microorganisms. The method.

However, in order to inject a gas such as ozone, there is a problem that a power source such as a pump is required.

Patent Document 1 Japanese Patent Laid-Open Publication No. 2010-75872

Therefore, this invention is intended to provide a gas dissolving mechanism capable of dissolving a gas without using a power source such as a pump.

In order to solve the above problems, in the invention, the following technical means are required.

(1) The gas dissolving mechanism of the present invention is characterized in that it has a gas dissolving tank for dissolving a gas in a liquid in the tank, and in the gas dissolving tank, the liquid in the tank is withdrawn and circulated to make the extracted liquid When returning to the tank, the ejector acts on the gas.

According to the gas dissolving mechanism, when the liquid extracted from the gas dissolving tank for dissolving the gas in the tank is returned to the tank, the ejector acts on the gas, so that the extracted liquid When returning to the tank, the viscosity of the liquid can be introduced into the tank. That is, the gas suction action can be applied to a supply source of gas (a gas decomposition tank to be described later).

Further, by this, it is possible to simplify the entire structure of the apparatus without requiring a power source (injection of a fan or introduction of a vacuum pump).

Further, since the liquid in the tank is withdrawn and circulated in the gas dissolving tank, the stirring action of the liquid in the tank can be exerted.

(2) It is also possible to have a gas separation tank for volatilizing the gas, and the gas separation tank can be foamed, and the liquid in the tank can be circulated and sprayed.

When constructed in this way, the volatility of the gas can be increased by the bubbling (= gas eviction) caused by the gas separation tank (the gas is vented), and the droplets can be sprayed from the liquid by the circulation of the liquid in the tank. (The increase in the surface area caused by the atomization of the liquid) increases the volatility of the gas, so that the volatilization efficiency of the gas in the gas separation tank can be greatly improved. If heated, it is easier to gasify.

(3) The gas separation tank contains an effective chlorine (for example, hypochlorous acid or chlorine gas), the gas separation tank is made acidic, and the gas dissolution tank is set to be neutral to alkaline.

When it is configured in this way, it is possible to promote the volatilization of chlorine gas from the gas separation tank while volatilizing from the liquid in the acidic region (preferably strong acidity), from neutral to alkaline, and easily dissolved in the liquid chlorine. Moreover, the incorporation of chlorine gas in the gas dissolution tank can be promoted.

(4) Drainage can be exemplified as the liquid in the tank of the gas dissolution tank. This drainage system refers to water containing contaminated components (oxidized substances mainly composed of organic components), and includes not only dyed factory wastewater discharged to the river after treatment (disposal), but also reusables (chemical factory, liquid crystal manufacturing) Part of the plant or other plant wastewater is reused as ultrapure water) or recycled (pool water).

In addition, it is also possible to exemplify soil-exuding water containing contaminated soil from oily oil leaking from heavy oil tanks or connecting pipes in the business office, contaminated soil containing harmful organic components in the open space of the chemical plant, and contaminated soil caused by oil in the gas station site ( Or its groundwater).

Here, in order to treat a soil which is difficult to dissolve in water, such as a soil contaminated with heavy oil, when it is hydrophilized by an amphiphilic organic solvent (for example, DMSO, DMAc, DMF, MEA, IPA), When it is transferred to water, it can be used as a soil drain to perform purification treatment.

In addition, the oil-and-fat portion (animal, plant, mineral, etc.) separated by a grease trap such as a commercial cooking device is hydrophilized by the above-mentioned amphiphilic organic solvent, and is extracted and transferred to water. Perform purification treatment. Thereby, the value of the n-hexane extract can be reduced and processed to comply with the drainage discharge reference value.

This invention is as described above and has the following effects.

Since the suction function and the supply source of the gas can be provided, a gas dissolving mechanism capable of injecting a gas without using a power source such as a pump can be provided.

The best form for implementing the invention

Hereinafter, embodiments of the invention will be described with reference to the drawings.

(Drainage raw water adjustment tank)

As shown in Fig. 1, the drainage water 1 of a predetermined amount of the factory is stored in advance in the drainage raw water adjustment tank 2, and the pollution degree of the drainage which can be changed by the time zone during the operation is determined. COD (Chemical Oxygen Demand) or TOC (Total Organic Carbon) can be exemplified as a gravimetric evaluation index that quantifies the degree of contamination of the aforementioned drainage.

Sand filter tank

The drainage stored in the drainage raw water adjustment tank 2 is first sent to the sand filtration tank 3 by the pump P to be filtered, and the solid foreign matter such as the ss component or the inclusions contained therein is removed. Thereby, foreign matter is prevented from intruding into the diaphragmless electrolysis mechanism 4, and the smooth processing for a long period of time is guaranteed. In addition, P shows the pump in the figure.

(septic tank)

The filtered drain in the sand filter tank 3 and the high-concentration electrolytic hypochlorous acid (effective chlorine) supplied from the gas-liquid mixing tank (gas dissolution tank) 5 through the diaphragmless electrolysis mechanism 4 are supplied to the purification tank 6 at a constant flow rate. Confluence, thereby oxidizing and decomposing the dirty components in the drainage. Here, the hypochlorous acid (effective chlorine) is electrolyzed by the diaphragmless electrolysis mechanism immediately before it is combined with the drainage water, whereby not only the oxidizing power of the effective chlorine but also the activity due to electrolysis can be utilized. Strong oxidizing power of hydroxyl groups. Thereby, the COD or TOC of the drainage can be significantly reduced.

(effective chlorine)

The effective chlorine is chlorine having a decomposition energy of a dirty component, and is a form of (dissolved) chlorine gas (Cl ₂ ), a form of hypochlorous acid (HOCl), and a form of hypochlorous acid ion (ClO ⁻ ). Moreover, the form of available chlorine is dependent on pH. That is, the form of chlorine gas increases as it goes to the lower pH region, and the form of hypochlorous acid increases when it reaches the neutral zone, and the form of hypochlorous acid increases as it goes to the high ph zone. That is, the morphological change of available chlorine is pH dependent, which is caused by the change in the concentration of hydrogen ions and chloride ions in the liquid.

Residue of available chlorine

(residual chlorine residue)

By using effective chlorine to decompose the dirty components, the COD or TOC of the drainage can be reduced, but the high concentration of available chlorine remains. Since this residual chlorine has a high oxidative decomposition effect, even if the COD or the like is sufficiently reduced, it cannot be released to the river (such as adverse effects on the natural environment) or reused (recycling at the factory as ultrapure water). Therefore, it is sent to the chlorine separation tank 7 of the next step to reduce residual chlorine.

(chlorine separation tank)

In the chlorine separation tank 7 (the 35% hydrochloric acid aqueous solution is initially stored after the treatment, and the drainage is sequentially supplied and treated), the residual chlorine in the treated drain in the purification tank 6 is configured by the structure described below. It is converted into chlorine gas 8, and is sent to the gas-liquid mixing tank (gas dissolution tank) by a fan. Thereby, the residual chlorine concentration of the chlorine separation tank 7 can be remarkably reduced.

(gas-liquid mixing tank)

Alkaline water is stored in the gas-liquid mixing tank (gas dissolution tank) 5 (12% hypochlorous acid soda is initially stored in the treatment, 20% sodium hydroxide solution can be replenished, etc.), and the alkaline water is mixed and separated in chlorine gas. The chlorine gas vaporized in the tank 7 dissolves the chlorine gas in the alkaline water to produce a high concentration of hypochlorous acid (effective chlorine). The chlorine gas separation tank 7 and the gas-liquid mixing tank (gas dissolution tank) 5 are circulated by the liquid, and the chlorine gas volatilized in the chlorine gas separation tank 7 is transferred to the gas-liquid mixing tank (gas dissolution tank) 5 by the fan F. Further, when the gas-liquid mixing tank (gas dissolution tank) 5 is arranged in two rows, a higher concentration of chlorine gas (not shown) can be taken in.

(activated carbon filter tank)

Then, it is sent to the activated carbon filter tank 9 in the treated water in the alkaline water and the chlorine gas separation tank 7, and in the activated carbon filter tank 9, the treatment remaining in the chlorine gas separation tank 7 is almost completely removed. A trace amount of COD or trace residual chlorine in the drainage. Then, the drain from which the treated soil components in the activated carbon filter tank 9 are removed is stored in the treated drain storage tank 10. Next, the treated drain storage tank 10 is sent out by the pump P for discharge or reuse, and a portion is supplied to the anode side 12 of the diaphragm electrolysis mechanism 11.

Moreover, the treatment method of the drainage has a purification step, a chlorine separation step (chlorine removal step), and a chlorine recovery step (chlorine regeneration step), which is performed in the purification tank 6, and the pollution evaluation index of the drainage is reduced by the effective chlorine. The chlorine separation step is carried out by sending the treated water in the purification step to an acidic environment (preferably at a pH of 2 or less, preferably from a point at which the residual chlorine concentration can be further lowered, preferably pH 1 or less). If the chlorine is changed to chlorine and volatilized, the chlorine recovery step is to send the chlorine gas volatilized in the chlorine separation step to an alkaline environment (preferably, pH 12 or higher, from the point where the solubility of chlorine gas can be further increased, and the pH is 13 or higher. a preferred gas-liquid mixing tank (gas dissolution tank) 5, which is dissolved in the liquid, thereby regenerating the chlorine gas into an effective chlorine, and the treatment method and purifying the effective chlorine recovered in the chlorine recovery step described above Step utilization.

Here, as described above, the lower the pH, the higher the tendency of the effective chlorine (residual chlorine) to volatilize from the form of hypochlorous acid to the form of chlorine gas. Therefore, if the pH of the chlorine separation tank 7 is as small as possible, it is adjusted to 1 is better.

In the treatment method of the drainage, in the purification step, the evaluation index of the drainage of the drainage is reduced by the effective chlorine, and the treated water is sent to the chlorine separation tank 7 in the acidic environment, and the residual chlorine is changed into chlorine gas to be volatilized and separated. And removing, the chlorine gas volatilized in the chlorine separation step is sent to a gas-liquid mixing tank (gas dissolution tank) 5 in an alkaline environment to be dissolved in the liquid, whereby the chlorine gas is recovered and regenerated into effective chlorine, and Since the chlorine which is recovered and regenerated in the chlorine recovery step is utilized in the purification step, the residual chlorine after the drainage treatment can be reused, and the operation cost is superior to the conventional one.

This structure is described in detail. In the chlorine separation step, the residual chlorine (HOCl) is easily changed to chlorine (Cl ₂ ) to volatilize in an acidic environment (the amount of hydrogen ions is extracted from HOCl to be changed to chlorine). Separation and removal of residual chlorine from the treated drainage. That is, when the treated water in the purification step is sent to the chlorine separation tank 7 in an acidic environment, the residual chlorine changes to chlorine and volatilizes. Thereby, the concentration of residual chlorine in the wastewater after the treatment of COD or the like is reduced can be remarkably reduced. Therefore, when a certain amount is withdrawn from the chlorine separation tank 7, and the pH is adjusted to neutralize from acidic to neutral, the dischargeable standard is reached. To adjust Ph, sodium hydroxide may be added to the extracted acidic water or alkaline water or the like which is introduced to the cathode side of the diaphragm electrolysis mechanism 11 to be described later.

In addition, after the neutralization, if necessary, when it is introduced into the activated carbon filter tank 9 or the RO membrane (not shown), it can be regenerated as ultrapure water, and can be used for washing the semiconductor wafer of the factory or cleaning the liquid crystal. Wait. In other words, according to the treatment method of the drainage, the contaminated wastewater after cleaning the semiconductor wafer or the like is again purified to generate ultrapure water, thereby constructing a cycle of use of the plant water.

Further, in the chlorine recovery step, the chlorine gas which is easily dissolved in the alkaline environment (the chlorine gas and the hydroxide ions are combined to form hypochlorous acid) is used to transfer the chlorine gas which has been volatilized in the chlorine separation step to the gas-liquid mixing tank ( The gas dissolves in the tank 5). In other words, the chlorine gas which has been volatilized in the chlorine separation step is sent to the gas-liquid mixing tank (gas dissolution tank) 5 in an alkaline environment, and is dissolved in the liquid, whereby chlorine gas can be regenerated as effective chlorine. In addition, for gas-liquid mixing, a scrubber mechanism (spraying a droplet of a gas-liquid mixing tank (gas dissolved helium) 5 into chlorine gas) or aeration treatment (a chlorine gas-inhalation liquid mixing tank (gas dissolution) is used. Slot) 5)).

Moreover, the available chlorine in the gas-liquid mixing tank (gas dissolution tank) 5 regenerated in the chlorine recovery step is used to reduce the fouling evaluation index of the drainage in the purification step. Specifically, a certain amount can be extracted from the drain tank for storing the original drain and the gas-liquid mixing tank (gas dissolving tank) 5 to make the merge. The treated water after the merging reduces the pollution evaluation index, and then, as described above, is sent to the chlorine separation tank 7 in an acidic environment.

In addition to the above, it is known that even if residual oxidation energy is left, residual chlorine is lost when it is used up (because it cannot be discharged as a drain, it is destroyed by adding a reducing agent), and the above-mentioned pH dependence on the solubility characteristics of chlorine gas is transmitted through The period of morphological change of liquid (acidic) → gas (gas) → liquid (alkaline) is recovered, regenerated, and reused for purification of drainage.

In other words, in the present treatment method, the effective chlorine which cannot be separated from the drainage in the neutral zone is formed into a chlorine gas in an acidic environment, and the phenomenon of being formed into a volatile state is utilized in the separation of residual chlorine in the drainage, and will be treated. Subsequent drainage adjusts the pH to form an acidic environment, and the available chlorine is changed to the form of chlorine gas, whereby it can be separated from the liquid phase as a gas phase.

Further, by changing the pH of the drainage water in accordance with the meaning of each treatment tank, there is an advantage that the available chlorine remaining after the treatment (which is not destroyed by the reducing agent) can be recycled and reused.

Drainage refers to water containing contaminated components (oxidized substances mainly composed of organic components), including not only dyed factory wastewater, but also released to the river after treatment (recycling), including reusables (chemical plants, liquid crystal manufacturing plants) Or some of the other plant wastewater is reused as ultrapure water) or recycled (pool water).

In addition, it is also possible to exemplify soil-exuding water containing contaminated soil from oily oil leaking from heavy oil tanks or connecting pipes in the business office, contaminated soil containing harmful organic components in the open space of the chemical plant, and contaminated soil caused by oil in the gas station site ( Or its groundwater).

Here, when it is desired to treat a soil which is difficult to dissolve in water, such as a soil contaminated with heavy oil, it is hydrophilized by an amphiphilic organic solvent (for example, DMSO, DMAc, IPA) to be transferred to In the case of water, it can be used as a soil drain to perform purification treatment.

In addition, the oil-and-fat portion (animal, plant, mineral, etc.) separated by a grease trap such as a commercial cooking device is hydrophilized by the above-mentioned amphiphilic organic solvent, and is extracted and transferred to water. Perform purification treatment. Thereby, the value of the n-hexane extract can be reduced and processed to comply with the drainage discharge reference value.

In addition, the drainage treatment device can be moved to a large truck or a ship, and moved to a factory in each place to demonstrate that the drainage is actually formed into clean water. This is completely infeasible in the biological treatment of the pit, and it is only possible to use the invention of electrolysis.

In addition, the drainage treatment device is equipped in a ship or the like, and attracts and recovers the oil that floats on the sea in the area of the reef of the tanker that causes the leakage of the crude oil or the like, or the coast where the drift arrives, and the organic solvent of the amphiphilic medium is used. The emulsified layer in which the oil component and the water are mixed (the uppermost layer of the oil component of 8 to 90% or more is subjected to other treatments <= reuse as a fuel) is more hydrophilic, and the purification treatment can be performed as drainage. The sea area covered by crude oil is in anoxic state, and it has a very bad impact on the ecosystem of aquatic organisms. However, if it is treated as described above, the sea or the coastline of the ocean will be purified, and the improvement of the global environment can be greatly improved. contribution. That is, seawater in the contaminated area of the ocean can also be treated as the drainage of the invention.

A portion of the treated drain storage tank 10 is withdrawn (the remainder is sent to the discharge 13) to the anode side 12 of the diaphragm electrolysis mechanism 11, and the acidic water introduced to the anode side 12 is supplied to the chlorine separation tank 7. Further, it is also possible to supply the 3% saline solution to the anode side 12 of the diaphragm electrolysis mechanism 11 without supplying the treated drain.

Since hydrogen ions are generated on the anode side 12 of the diaphragm electrolysis mechanism 11 to generate acidic water, the acid water supplied to maintain the hydrogen ion concentration (pH) of the chlorine separation tank 7 can be treated to be drained. (The salt concentration is several %) The acid water (electrolyte value 8A/dm ² ) corresponds to the acidic water, and is not corresponding to a chemical such as hydrochloric acid. Therefore, the cost of the chemical such as hydrochloric acid can be reduced or omitted. Further, the residual chlorine concentration at the outlet of the anode side 12 of the diaphragm electrolysis mechanism 11 was 1000 ppm.

Further, since the anode side 12 of the diaphragm electrolysis mechanism 11 is electrolyzed in the presence of chloride ions (chloride ions), the pH is lowered and chlorine gas (Cl ₂ ) is generated, so that it is newly produced by electrolysis. The effective chlorine is transferred to the gas-liquid mixing tank (gas dissolution tank) 5 to dissolve it, and the residual chlorine concentration in the gas-liquid mixing tank (gas dissolution tank) 5 is increased when the residual chlorine is recovered (the residual chlorine concentration is increased). Up to 200,000 ppm).

Here, when the chlorine separation tank 7 is heated, chlorine gas can be more volatile.

The tap water 15 is supplied to the cathode side 14 of the diaphragm electrolysis mechanism 11, and the alkaline water introduced to the cathode side 14 is supplied to the gas-liquid mixing tank (gas dissolving tank) 5. Alternatively, a portion may be withdrawn from the treated drain storage tank 10 for supply to the cathode side 14.

Since hydroxide ions are generated on the cathode side 14 of the diaphragm electrolysis mechanism 11 to generate alkaline water, when this is done, the hydrogen ion concentration (pH) of the gas-liquid mixing tank (gas dissolution tank) 5 is maintained at the base. The alkaline water to be supplied can be correspondingly treated with alkaline water produced by electrolysis (current value: 8 A/dm ² ), and not by a chemical such as sodium hydroxide. Therefore, the cost of the chemical such as sodium hydroxide can be reduced or omitted.

(Second embodiment)

Differences from the above-described first embodiment will be described.

In this embodiment, the drain water treated in the purification tank 6 is supplied to the anode side 12 of the diaphragm electrolysis mechanism (not shown), and then supplied to the chlorine gas separation tank 7. In other words, in addition to the gas-liquid mixing tank (gas dissolving tank) 5 and the diaphragm electrolysis mechanism 11 for supplying the acidic water and the alkaline water to the gas-liquid mixing tank (gas dissolving tank) 5, one diaphragm electrolysis mechanism is added and set. It is between the purification tank 6 and the chlorine separation tank 7.

Since hydrogen ions are generated on the anode side of the separator electrolysis mechanism, Ph is transferred to be acidic, so that the chlorine gas separation tank 7 is formed in an environment in which chlorine gas is more volatile, and has a large amount of chlorine gas generated in the chlorine gas separation tank 7. advantage.

Here, when hydrochloric acid is added to the drain to flow to the anode side, the chloride ion added to the hydrochloric acid of the drain discharges electrons in the anode side region of the diaphragm electrolysis mechanism, and changes to chlorine gas, so that chlorine gas in the chlorine gas separation tank 7 is provided. The advantage of increased production.

Example

As shown in Fig. 1 and Fig. 2, the gas dissolving mechanism of this embodiment has a chlorine gas dissolving tank (gas-liquid mixing tank) 5 for dissolving a gas in a tank. In the gas dissolving tank 5, the liquid in the tank is pumped by the pump P to circulate, and when the pumped liquid is returned to the tank, the ejector E is caused to act on the gas by the ejector E. Then, the chlorine gas is sent to the gas dissolving tank 5, dissolved by the ejector, dissolved in the liquid, and then discharged from the discharge port 16.

The ejector function refers to the fact that the liquid in the chlorine gas dissolution tank 5 circulated by the pump P is sent from the circulation pipe 18 to the small-diameter pipe 19 having a small diameter, and the chlorine contained in the gas separation tank 7 is taken in and sucked into the liquid. The role of. Thereby, the gas containing the chlorine gas in the gas separation tank 7 can be taken in the gas dissolution tank 5 and dissolved.

The chlorine separation tank 7 which volatilizes chlorine gas is foamed (ventilated) by the bubble pump BP. By the press-fitting of the fine bubbles 17 by the bubbling, the chlorine gas dissolved in the gas separation tank 7 is forcibly driven out to the gas phase. Further, the liquid in the tank of the gas separation tank 7 may be circulated and sprayed.

The gas separation tank 7 contains available chlorine (hypochlorous acid HOCl or chlorine gas Cl ₂ ). Then, the gas separation tank 7 is set to be strongly acidic (about pH 2), and the gas dissolution tank 5 is set to be neutral (about pH 5.5).

The concentration of the residual chlorine in the tank of the gas dissolution tank 5 is set to be maintained at about 60,000 ppm, and the drainage can be supplied thereto. This drainage refers to water containing contaminated components (mainly oxidized substances composed of organic components <phenols, dioxins and others>, also containing ammonia and other inorganic components), including not only dyed factory wastewater after treatment. Those who release to the river (discarded) also include recyclers (recycling part of chemical plants, liquid crystal manufacturing plants, or other plant wastewaters as <super> pure water) or recyclers (pool water).

In addition, it is also possible to exemplify soil-exuding water containing contaminated soil from oily oil leaking from heavy oil tanks or connecting pipes in the business office, contaminated soil containing harmful organic components in the open space of the chemical plant, and contaminated soil caused by oil in the gas station site ( Or its groundwater).

Here, in order to treat a soil which is difficult to dissolve in water, such as a soil contaminated with heavy oil, when it is hydrophilized by an amphiphilic organic solvent (for example, DMSO, DMAc, DMF, MEA, IPA), When it is transferred to water, it can be used as a soil drain to perform purification treatment.

In addition, the oil-and-fat portion (animal, plant, mineral, etc.) separated by a grease trap such as a commercial cooking device is hydrophilized by the above-mentioned amphiphilic organic solvent, and is extracted and transferred to water. Perform purification treatment. Thereby, the value of the n-hexane extract can be reduced and processed to comply with the drainage discharge reference value.

Next, the gas dissolving mechanism of this embodiment will be described.

According to the gas dissolving mechanism, when the liquid extracted from the gas dissolving tank 5 for dissolving the gas in the tank is returned to the tank, the ejector acts on the gas, so that the pump is extracted. When the liquid returns to the tank, the viscosity of the liquid can be used to draw the gas into the tank.

In other words, the gas can be attracted to the gas supply source (the gas separation tank 7), and the gas can be injected without using a power source such as a vacuum pump.

Moreover, there is no need for a power source (injection of a fan or pumping of a vacuum pump, etc.), and there is an advantage that the overall structure of the apparatus can be simplified.

Further, since the liquid in the tank is taken out and circulated in the gas dissolving tank 5, the stirring action of the liquid in the tank can be exerted.

Then, since the gas separation tank 7 which volatilizes the gas is provided, the gas separation tank 7 can be foamed, so that the gas is ignited by the gas in the glass separation tank 7 (= gas is driven out), thereby increasing the volatility of the gas. It has the advantage that the volatilization efficiency of the gas in the gas separation tank can be greatly improved.

Since the gas separation tank 7 contains effective chlorine (such as hypochlorous acid or chlorine gas), the gas separation tank 7 is made acidic, and the gas dissolution tank 5 is made neutral, which has the following advantages. The advantage is that it is easy to be volatilized from liquid in the acidic region (highly acidic), and is neutral to alkaline, and is easily dissolved in the liquid chlorine. It can promote the volatilization of chlorine from the gas separation tank and can promote The chlorine gas is taken in the gas dissolution tank 5.

Further, when the liquid in the gas separation tank 7 is circulated and sprayed, the liquid is circulated by the circulation of the liquid in the tank, and the volatility of the gas is increased from the droplets (the surface area due to the atomization of the liquid). Moreover, if the temperature is increased, it is easier to vaporize.

Industrial availability

The gas can be supplied to the gas source without using a power source such as a pump, thereby being applicable to various gas dissolving mechanisms.

1. . . drain

2. . . Drainage raw water adjustment tank

3. . . Sand filter tank

4. . . Diaphragmless electrolysis mechanism

5. . . Gas-liquid mixing tank (gas dissolution tank)

6. . . Septic tank

7. . . Chlorine separation tank (gas separation tank)

8. . . Chlorine gas

9. . . Activated carbon filter tank

10. . . Discharged storage tank

11. . . Diaphragm electrolysis mechanism

12. . . Anode side

13. . . discharge

14. . . Cathode side

15. . . Tap water

16. . . Discharge

F. . . fan

P. . . Pump

Fig. 1 is a system flow chart showing an embodiment of a wastewater treatment apparatus using the gas dissolution mechanism of the present invention.

Figure 2 is a cross-sectional view showing an embodiment of the gas dissolving mechanism of the present invention.

1. . . drain

2. . . Drainage raw water adjustment tank

3. . . Sand filter tank

4. . . Diaphragmless electrolysis mechanism

5. . . Gas-liquid mixing tank (gas dissolution tank)

6. . . Septic tank

7. . . Chlorine separation tank (gas separation tank)

8. . . Chlorine gas

9. . . Activated carbon filter tank

10. . . Discharged storage tank

11. . . Diaphragm electrolysis mechanism

12. . . Anode side

13. . . discharge

14. . . Cathode side

15. . . Tap water

F. . . fan

P. . . Pump

Claims (1)

A gas dissolving mechanism characterized by having a gas dissolving tank for dissolving a gas in a liquid in a tank, and extracting a liquid in the tank in the gas dissolving tank to circulate it so as to return the extracted liquid to the tank In the meantime, the ejector acts on the gas, and the gas dissolving mechanism has a gas separation tank for volatilizing the gas, and the gas separation tank can be foamed, and the liquid in the tank can be circulated and sprayed. The gas separation tank contains available chlorine, the gas separation tank is set to be acidic, and the gas dissolution tank is set to be neutral to alkaline.