CN111517440A - Alkali waste liquid neutralization device - Google Patents
Alkali waste liquid neutralization device Download PDFInfo
- Publication number
- CN111517440A CN111517440A CN202010063242.0A CN202010063242A CN111517440A CN 111517440 A CN111517440 A CN 111517440A CN 202010063242 A CN202010063242 A CN 202010063242A CN 111517440 A CN111517440 A CN 111517440A
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- Prior art keywords
- waste liquid
- treatment tank
- carbon dioxide
- gas
- gas supply
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims abstract description 195
- 239000002699 waste material Substances 0.000 title claims abstract description 189
- 239000003513 alkali Substances 0.000 title claims abstract description 44
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 57
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 57
- 238000009792 diffusion process Methods 0.000 claims abstract description 31
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 31
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 32
- 239000002253 acid Substances 0.000 abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000011143 downstream manufacturing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/30—Workflow diagrams or layout of plants, e.g. flow charts; Details of workflow diagrams or layout of plants, e.g. controlling means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides an alkali waste liquid neutralizing device which can easily and quickly neutralize alkali waste liquid without using strong acid. The alkali waste liquid neutralization device is provided with: a treatment tank capable of storing an alkaline waste liquid; a gas diffusion pipe provided on the bottom side of the treatment tank; and a gas supply unit which is provided with a gas supply source capable of supplying carbon dioxide gas, supplies the carbon dioxide gas from the gas supply source to the gas diffusion pipe at a pressure of a predetermined value or more, and releases the carbon dioxide gas from the gas diffusion pipe into the alkaline waste liquid stored in the treatment tank in the form of fine bubbles, and dissolves the carbon dioxide gas in the waste liquid while flowing the waste liquid. Preferably, the apparatus further comprises a waste liquid discharge path for discharging the neutralized waste liquid from the treatment tank, and a pH measuring device for measuring pH of the neutralized waste liquid, wherein the waste liquid discharge path comprises an electromagnetic valve, and the electromagnetic valve stops discharge of the waste liquid from the treatment tank when the pH of the waste liquid measured by the pH measuring device is a predetermined value or more.
Description
Technical Field
The present invention relates to an alkali waste liquid neutralizing device for neutralizing an alkali waste liquid.
Background
In various processes performed in various factories, for example, an alkaline liquid is sometimes used (see, for example, patent document 1). Since waste liquid after the use of alkaline liquid exerts an adverse effect on the environment if it is discarded in a state of being kept strongly alkaline, the waste liquid is discarded after being neutralized by treatment equipment in a factory.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-244537
Disclosure of Invention
Problems to be solved by the invention
In the neutralization of the alkaline waste liquid, a strong acid such as sulfuric acid is used, and care must be taken in the treatment of the strong acid. For example, the workers handling the strong acids need to take safety measures and require a strict strong acid management system. In particular, when a strong acid is used to neutralize an alkaline waste liquid, a large amount of neutralization heat is generated, and it is necessary to precisely control the timing of adding the strong acid to the alkaline waste liquid.
In addition, if an excessive amount of strong acid is accidentally added to the alkaline waste liquid, the waste liquid becomes acidic. This waste liquid cannot be discarded directly from the factory, and therefore, it is sometimes necessary to perform an operation of further supplying an alkaline liquid to this waste liquid.
The present invention has been made in view of the above problems, and an object thereof is to provide an alkali waste liquid neutralizing device capable of easily and quickly neutralizing an alkali waste liquid without using a strong acid.
Means for solving the problems
According to one aspect of the present invention, there is provided an alkali waste liquid neutralizing device comprising: a treatment tank capable of storing an alkaline waste liquid; a gas diffusion pipe provided on the bottom side of the treatment tank; and a gas supply unit which is provided with a gas supply source capable of supplying carbon dioxide gas, supplies the carbon dioxide gas from the gas supply source to the gas diffusion pipe at a pressure of a predetermined level or higher, and releases the carbon dioxide gas from the gas diffusion pipe in the form of fine bubbles into the alkaline waste liquid stored in the treatment tank, and dissolves the carbon dioxide gas in the waste liquid while flowing the waste liquid.
Preferably, the gas supply source is a gas storage bottle in which carbon dioxide is compressed and sealed in a pressure-resistant container.
Preferably, the alkali waste liquid neutralizing device further includes a waste liquid discharge path for discharging the neutralized waste liquid from the treatment tank, and a pH measuring instrument for measuring pH of the neutralized waste liquid, wherein the waste liquid discharge path includes an electromagnetic valve, and the electromagnetic valve stops discharge of the waste liquid from the treatment tank when the pH of the waste liquid measured by the pH measuring instrument is equal to or greater than a predetermined value.
Preferably, the alkali waste liquid neutralizing device further includes an upstream treatment tank provided with an upstream gas diffusion pipe connected to the gas supply unit, and the waste liquid in which the carbon dioxide gas released from the upstream gas diffusion pipe is dissolved flows into the treatment tank.
Effects of the invention
An alkaline waste liquid neutralizing device according to an aspect of the present invention includes a treatment tank capable of storing an alkaline waste liquid, a gas diffusion pipe provided on a bottom side of the treatment tank, a gas supply source capable of supplying a carbon dioxide gas, and a gas supply unit configured to supply the carbon dioxide gas to the treatment tank. When neutralizing the alkaline waste liquid stored in the treatment tank, carbon dioxide gas is supplied from a gas supply source to a gas diffusion pipe at a pressure of a predetermined level or more, and the carbon dioxide gas is released from the gas diffusion pipe into the alkaline waste liquid stored in the treatment tank as fine bubbles.
When bubbles of carbon dioxide gas are released into an alkaline waste liquid, the bubbles efficiently dissolve the carbon dioxide gas in the waste liquid while flowing through the waste liquid. When carbon dioxide is dissolved in an alkaline waste liquid, the waste liquid is neutralized, and the pH of the waste liquid is lowered. Further, even if carbon dioxide dissolves in the waste liquid in an amount more than necessary, carbon dioxide does not lower the pH of the waste liquid as much as a strong acid.
Therefore, even if the waste liquid in which carbon dioxide is excessively dissolved can be sufficiently discarded, it is not necessary to strictly control the amount of carbon dioxide gas released into the alkaline waste liquid stored in the treatment tank. In addition, carbon dioxide gas is easier to handle than a strong acid solution, and safety measures for workers are only required to be light.
Therefore, according to one embodiment of the present invention, there is provided an alkali waste liquid neutralizing device capable of easily and quickly neutralizing an alkali waste liquid without using a strong acid.
Drawings
FIG. 1 is a sectional view schematically showing an alkali waste liquid neutralizing apparatus provided with a treatment tank.
FIG. 2 is a sectional view schematically showing an alkali waste liquid neutralizing apparatus provided with a treatment tank and an upstream treatment tank.
Detailed Description
An embodiment of one embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a sectional view schematically showing an alkali waste liquid neutralizing apparatus 2 provided with a treatment tank 8. The alkali waste liquid neutralizing device 2 is a device for neutralizing the alkali waste liquid 1 in the treatment tank 8 and discharging the neutralized waste liquid.
The alkaline waste liquid 1 will be explained. The alkaline waste liquid 1 is, for example, a waste liquid of an alkaline reagent used in various processes, and is, for example, a strongly alkaline slurry used in polishing the surface of a disc-shaped workpiece. When the alkaline waste liquid 1 is discarded, the alkaline waste liquid 1 is neutralized so as to be in a state conforming to an environmental standard or the like so as not to adversely affect the environment. The alkaline waste liquid 1 is discharged from a processing apparatus 4 such as a polishing apparatus.
Next, the alkali waste liquid neutralizing apparatus 2 will be explained. The alkali waste liquid neutralizing device 2 is provided with a treatment tank 8, and the treatment tank 8 can store the alkali waste liquid 1 and perform a neutralization treatment of the waste liquid 1. The alkaline waste liquid 1 is sent from the processing apparatus 4 to the treatment tank 8 by the waste liquid sending pipe 6. An air diffusing pipe 10 is provided on the bottom side of the treatment tank 8. The gas diffusion pipe 10 is, for example, a diffuser that discharges compressed gas in the form of fine bubbles, and is a ceramic member that does not easily react with the alkaline waste liquid 1 and carbon dioxide.
The gas supply section 12 is connected to the gas diffusion pipe 10. The gas supply unit 12 includes a gas supply source 14 capable of supplying the carbon dioxide gas 5, and a gas supply passage 16 serving as a passage for supplying the carbon dioxide gas 5 to the gas diffusion pipe 10. The gas supply unit 12 supplies the carbon dioxide gas 5 from the gas supply source 14 to the gas diffusion pipe 10 through the gas supply path 16 at a pressure equal to or higher than a predetermined pressure.
Here, the gas supply source 14 is, for example, a gas storage bottle having a pressure-resistant container, and carbon dioxide is compressed and sealed in the gas supply source 14. The gas supply passage 16 is a pressure-resistant tubular member.
The gas supply unit 12 discharges the carbon dioxide gas 5 as fine bubbles 3 from the gas diffusion pipe 10 into the alkaline waste liquid 1 stored in the treatment tank 8, and dissolves the carbon dioxide gas 5 in the waste liquid 1 while flowing the waste liquid 1. When carbon dioxide is dissolved in the waste liquid 1, the waste liquid 1 is neutralized and pH is lowered. Then, the waste liquid 1 neutralized and reduced in pH is discharged from a waste liquid discharge line 18 connected to the bottom of the treatment tank 8.
Here, in order to efficiently dissolve the carbon dioxide contained in the bubbles 3 in the waste liquid 1, for example, it is preferable to extend the contact time between the bubbles 3 and the waste liquid 1. Therefore, for example, it is preferable that the air diffusing pipe 10 be capable of forming fine bubbles 3 to reduce the rising speed of the bubbles 3 in the waste liquid 1. Specifically, the pore diameter of the air holes of the air diffusion tube 10 is preferably 300 μm or less, more preferably 100 μm or less, and still more preferably 20 μm or less.
An experiment for neutralizing the alkaline waste liquid 1 performed by the alkaline waste liquid neutralizing apparatus 2 of the present embodiment will be described. In the case where the alkaline waste liquid 1 is a strongly alkaline slurry used in a polishing apparatus, the pH thereof is, for example, a value greater than 10. In this experiment, 60L of the slurry waste liquid 1 was prepared and stored in the treatment tank 8. Then, the gas supply unit 12 is operated to release carbon dioxide gas from the gas diffusion pipe 10 into the waste liquid 1 at a predetermined rate, and the pH change of the waste liquid 1 is observed.
For example, when carbon dioxide gas is released into the waste liquid 1 at a rate of 2L/min, the pH of the waste liquid 1 is lower than 7 in about 120 seconds from the start of the release of carbon dioxide gas. When carbon dioxide gas is released into the waste liquid 1 at a rate of 5L/min, the pH of the waste liquid 1 is lower than 7 in about 65 seconds from the start of the release of carbon dioxide gas. When carbon dioxide gas is released into the waste liquid 1 at a rate of 10L/min, the pH of the waste liquid 1 is lower than 7 in about 45 seconds from the start of the release of carbon dioxide gas.
In this way, it was confirmed that when carbon dioxide gas was released into the alkaline waste liquid 1, the waste liquid 1 could be neutralized. In these experiments, even if the supply of carbon dioxide gas to the waste liquid 1 is continued after the pH of the waste liquid 1 is lower than 7, the pH of the waste liquid 1 fluctuates less around pH 6. That is, it was confirmed that a strong acid was not formed even if the supply of carbon dioxide gas to the waste liquid 1 was continued excessively.
In the japanese drainage standard, the pH of the drainage discharged to the public water area other than the sea area is defined to be 5.8 to 8.6, and it is confirmed that the pH of the waste liquid 1 can be set to a pH approximately in accordance with the standard when the alkali waste liquid neutralization apparatus 2 of the present embodiment is used.
In the alkali waste liquid neutralizing apparatus 2 of the present embodiment, since the alkaline waste liquid 1 is neutralized with carbon dioxide gas, the neutralization treatment can be performed more safely than the case of using a strong acid such as sulfuric acid, hydrochloric acid, or nitric acid. Further, even if the treatment is carried out excessively to some extent, the pH of the waste liquid 1 is not easily lowered to the drainage standard, and therefore the control of the treatment is easily performed. Further, when the carbon dioxide gas storage bottle is used as the gas supply source 14, the ability to neutralize the alkaline waste liquid 1 can be maintained by replacing the storage bottle periodically, and therefore the alkaline waste liquid neutralizer 2 is also high in maintainability.
Next, a modification of the alkali waste liquid neutralizing device according to the present embodiment will be described with reference to fig. 2. Fig. 2 is a sectional view schematically showing an alkali waste liquid neutralizing apparatus 2a including a treatment tank 8a and an upstream treatment tank 20. The alkali waste liquid neutralization apparatus 2a includes 2 treatment tanks. That is, the alkali waste liquid neutralization apparatus 2a includes an upstream treatment tank 20 adjacent to the treatment tank 8a in addition to the treatment tank 8a, and performs the 1 st stage of neutralization treatment by the upstream treatment tank 20 and the 2 nd stage of neutralization treatment by the treatment tank 8 a.
In the example shown in FIG. 2, the alkaline waste liquid 1 is temporarily stored in the waste liquid tank 24, and the waste liquid tank 24 and the upstream processing tank 20 are connected by the waste liquid sending pipe 36. The waste liquid sending pipe 36 is provided with a pump 26, and when the pump 26 is operated, the alkaline waste liquid 1 stored in the waste liquid tank 24 can be sent to the upstream treatment tank 20 through the waste liquid sending pipe 36.
The upstream diffuser 22 is provided on the bottom side of the upstream processing bath 20. The alkali waste liquid neutralization device 2a includes a gas supply unit 12a, and the gas supply unit 12a includes a gas supply source 14b and a gas supply path 16b having one end connected to the gas supply source 14b and the other end connected to an upstream gas diffusion pipe 22. The air diffuser 10a is provided on the bottom side of the downstream processing bath 8 a. The gas supply unit 12a includes a gas supply source 14a and a gas supply passage 16a having one end connected to the gas supply source 14a and the other end connected to the gas diffusion pipe 10 a.
The components of the alkaline waste liquid neutralizer 2a are configured in the same manner as the components of the alkaline waste liquid neutralizer 2 shown in fig. 1. That is, the upstream gas diffusion pipe 22 and the gas diffusion pipe 10a are configured similarly to the gas diffusion pipe 10, the gas supply source 14a and the gas supply source 14b are configured similarly to the gas supply source 14, and the gas supply path 16a and the gas supply path 16b are configured similarly to the gas supply path 16. The gas supply source 14a and the gas supply source 14b of the gas supply unit 12a may be the same carbon dioxide gas storage bottle.
The alkaline waste liquid 1 stored in the waste liquid tank 24 is transferred to the upstream processing tank 20 by the functions of the pump 26 and the waste liquid sending pipe 36. Then, carbon dioxide gas is supplied from the gas supply portion 12a, bubbles 3 of carbon dioxide gas are released from the upstream gas diffusion pipe 22, and the waste liquid 1 is neutralized.
The upstream processing bath 20 is separated from the downstream processing bath 8a by, for example, a partition wall 30. When the alkaline waste liquid 1 is continuously supplied to the upstream treatment tank 20, the waste liquid 1a, which is neutralized by dissolving the carbon dioxide gas released from the upstream gas diffusion pipe 22 in the upstream treatment tank 20, overflows from the upstream treatment tank 20, and the waste liquid 1a flows into the treatment tank 8a beyond the partition wall 30. Then, carbon dioxide gas is supplied from the gas supply portion 12a, bubbles 3 of carbon dioxide gas are released from the gas diffusion pipe 10a, and the waste liquid 1a is neutralized.
The alkali waste liquid neutralizer 2a includes a tubular waste liquid discharge path 18a having one end reaching the inside of the treatment tank 8 a. The waste liquid discharge path 18a is provided with a pump 28, and when the pump 28 is operated, the waste liquid 1b neutralized in the treatment tank 8a is sucked up from the one end of the waste liquid discharge path 18a and discharged from the alkali waste liquid neutralizing device 2 a.
The waste liquid discharge path 18a is provided with a pH measuring instrument 32 capable of measuring the pH of the waste liquid 1b flowing through the waste liquid discharge path 18a, and an electromagnetic valve 34 capable of blocking the flow of the waste liquid 1b through the waste liquid discharge path 18 a. The pH meter 32 measures and monitors the pH value of the waste liquid. When the pH of the waste liquid 1b measured by the pH measuring instrument 32 is equal to or higher than a predetermined value, the electromagnetic valve 34 stops the discharge of the waste liquid from the treatment tank 8 a.
For example, when the pH value of the waste liquid 1b is equal to or greater than a predetermined value defined in the environmental standard, the pH measuring instrument 32 instructs the electromagnetic valve 34 to shut off the flow of the waste liquid 1b in the waste liquid discharge path 18 a. The alkali waste liquid neutralizing device 2a may further include a return channel for returning the waste liquid 1b, the flow of which is blocked, to the treatment tank 8 a.
The upstream treatment tank 20 of the alkali waste liquid neutralizer 2a is set to have a width of 330mm, a depth of 508mm and a height of 433mm, for example, and has a capacity of about 72L. The processing bath 8a has a width of 555mm, a depth of 508mm, and a height of 402mm, for example, and has a capacity of about 113L.
In the upstream treatment tank 20, in order to dissolve a larger amount of carbon dioxide in the alkaline waste liquid 1a having a high pH and rapidly lower the pH, the height of the upstream treatment tank 20 is made higher than that of the downstream treatment tank 8a, and the bubbles 3 are stored in the waste liquid 1a for a longer time. On the other hand, in the treatment tank 8a, in order to uniformly perform the neutralization treatment on all the waste liquid 1b without variation, the bottom area of the treatment tank 8a is made larger than that of the upstream treatment tank 20, and the agitation of the waste liquid 1b by the bubbles 3 is likely to occur.
The alkali waste liquid neutralizing device 2a can thus perform the neutralization treatment more reliably by dividing the alkali waste liquid 1 into 2 stages. Further, since the waste liquid discharge path 18a includes the pH measuring instrument 32 and the electromagnetic valve 34, the waste liquid 1 is not discharged at a pH value that does not meet the environmental standard. The alkali waste liquid neutralization apparatus 2a of the present embodiment can easily and quickly neutralize an alkali waste liquid without using a strong acid.
The present invention is not limited to the above-described embodiments, and can be implemented with various modifications. For example, in the above embodiment, the case where the upstream treatment tank 20 and the treatment tank 8a are separated by the partition wall 30 in the alkali waste liquid neutralization apparatus 2a including 2 treatment tanks has been described, but one embodiment of the present invention is not limited thereto. The alkali waste liquid neutralization apparatus according to one embodiment of the present invention may further include a liquid feed path having one end reaching the inside of the upstream treatment tank and the other end reaching the downstream treatment tank. In this case, a pump is provided in the liquid feed path.
The structure, method, and the like of the above embodiments may be modified as appropriate without departing from the scope of the object of the present invention.
Description of the symbols
1 alkaline waste liquid
3 air bubble
5 carbon dioxide gas
2,2a alkali waste liquid neutralization device
4 processing device
6 liquid conveying pipe for waste liquid
8,8a treatment tank
10,10a air dispersing pipe
12,12a gas supply part
14,14a,14b gas supply
16,16a,16b gas supply path
18,18a waste liquid discharge path
20 upstream treatment tank
22 upstream air dispersing pipe
24 waste liquid tank
26,28 pump
30 partition wall
32pH measurer
34 solenoid valve
36 waste liquid feeding tube
Claims (4)
1. An alkali waste liquid neutralization apparatus, characterized by comprising:
a treatment tank capable of storing an alkaline waste liquid;
a gas diffusion pipe provided on the bottom side of the treatment tank; and
and a gas supply unit which is provided with a gas supply source capable of supplying carbon dioxide gas, supplies the carbon dioxide gas from the gas supply source to the gas diffusion pipe at a pressure equal to or higher than a predetermined pressure, and releases the carbon dioxide gas from the gas diffusion pipe in the form of fine bubbles into the alkaline waste liquid stored in the treatment tank, thereby dissolving the carbon dioxide gas in the waste liquid while flowing the waste liquid.
2. The apparatus for neutralizing an alkaline waste liquid according to claim 1, wherein the gas supply source is a gas storage bottle in which carbon dioxide is compressed and sealed in a pressure-resistant container.
3. The alkali waste liquid neutralizing device according to claim 1 or 2, further comprising:
a waste liquid discharge path for discharging the neutralized waste liquid from the treatment tank; and
a pH measuring device for measuring the pH of the neutralized waste liquid,
the waste liquid discharge path includes an electromagnetic valve for stopping discharge of the waste liquid from the treatment tank when the pH of the waste liquid measured by the pH meter is equal to or higher than a predetermined value.
4. The alkali waste liquid neutralizing device according to any one of claims 1 to 3,
the alkali waste liquid neutralizing device further comprises an upstream treatment tank provided with an upstream gas diffusion pipe connected to the gas supply part,
the waste liquid in which the carbon dioxide gas released from the upstream gas diffusion pipe is dissolved in the upstream processing tank flows into the processing tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-018792 | 2019-02-05 | ||
| JP2019018792A JP7187117B2 (en) | 2019-02-05 | 2019-02-05 | Alkaline waste liquid neutralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111517440A true CN111517440A (en) | 2020-08-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010063242.0A Pending CN111517440A (en) | 2019-02-05 | 2020-01-20 | Alkali waste liquid neutralization device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7187117B2 (en) |
| KR (1) | KR20200096742A (en) |
| CN (1) | CN111517440A (en) |
| TW (1) | TWI825263B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487660A (en) * | 2022-11-01 | 2022-12-20 | 浙江海暨核生科技有限公司 | Method and device for carbon neutralization by using seawater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2581439Y (en) * | 2002-11-16 | 2003-10-22 | 郭永明 | Micro-power consumption sewage treater |
| JP2003326281A (en) * | 2002-05-13 | 2003-11-18 | Toa Harbor Works Co Ltd | Method for neutralizing alkaline drainage |
| JP3146693U (en) * | 2008-09-13 | 2008-11-27 | 新日本リース株式会社 | Alkaline wastewater treatment equipment |
| JP2015003299A (en) * | 2013-06-20 | 2015-01-08 | Ｄｏｗａエコシステム株式会社 | Apparatus and method for wastewater treatment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3745246B2 (en) | 2001-06-08 | 2006-02-15 | 麒麟麦酒株式会社 | Alkaline wastewater treatment method and apparatus |
| JP3769475B2 (en) | 2001-06-19 | 2006-04-26 | エア・ウォーター株式会社 | Neutralization method of high alkaline wastewater with flue gas |
| JP5916513B2 (en) | 2012-05-23 | 2016-05-11 | 株式会社ディスコ | Processing method of plate |
| JP6063806B2 (en) | 2012-08-16 | 2017-01-18 | 株式会社Ihi | Neutralizer |
| CN105645672A (en) * | 2015-12-31 | 2016-06-08 | 安徽省绿巨人环境技术有限公司 | Device and method for treating alkaline wastewater |
-
2019
- 2019-02-05 JP JP2019018792A patent/JP7187117B2/en active Active
-
2020
- 2020-01-20 CN CN202010063242.0A patent/CN111517440A/en active Pending
- 2020-01-30 TW TW109102739A patent/TWI825263B/en active
- 2020-02-04 KR KR1020200013192A patent/KR20200096742A/en active Search and Examination
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003326281A (en) * | 2002-05-13 | 2003-11-18 | Toa Harbor Works Co Ltd | Method for neutralizing alkaline drainage |
| CN2581439Y (en) * | 2002-11-16 | 2003-10-22 | 郭永明 | Micro-power consumption sewage treater |
| JP3146693U (en) * | 2008-09-13 | 2008-11-27 | 新日本リース株式会社 | Alkaline wastewater treatment equipment |
| JP2015003299A (en) * | 2013-06-20 | 2015-01-08 | Ｄｏｗａエコシステム株式会社 | Apparatus and method for wastewater treatment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487660A (en) * | 2022-11-01 | 2022-12-20 | 浙江海暨核生科技有限公司 | Method and device for carbon neutralization by using seawater |
| CN115487660B (en) * | 2022-11-01 | 2023-10-17 | 浙江海暨核生科技有限公司 | Method and device for carbon neutralization by utilizing seawater |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202030154A (en) | 2020-08-16 |
| TWI825263B (en) | 2023-12-11 |
| JP2020124683A (en) | 2020-08-20 |
| JP7187117B2 (en) | 2022-12-12 |
| KR20200096742A (en) | 2020-08-13 |
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Application publication date: 20200811 |