CN101767858A - Method for alkaline waste water treatment through aeration process - Google Patents
Method for alkaline waste water treatment through aeration process Download PDFInfo
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- CN101767858A CN101767858A CN201010046509A CN201010046509A CN101767858A CN 101767858 A CN101767858 A CN 101767858A CN 201010046509 A CN201010046509 A CN 201010046509A CN 201010046509 A CN201010046509 A CN 201010046509A CN 101767858 A CN101767858 A CN 101767858A
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- waste water
- alkaline waste
- water treatment
- aeration process
- aeration
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Abstract
The invention relates to the field of waste water treatment, in particular to a method for alkaline waste water treatment through an aeration process. The method is that the aeration process is used for directly filling air into alkaline waste water to enable carbon dioxide in air to neutralize with the alkaline waste water. By using the carbon dioxide in the air to neutralize with the alkaline waste water, the method of the invention can reduce the pH value of the alkaline waste water and can ensure the alkaline waste water to be compliant with the emission standards.
Description
Technical field
The present invention relates to field of waste water treatment, be specifically related to a kind of treatment process of alkaline waste water.
Background technology
Coal-fired power plant is in power generation process, and a large amount of coal that burns produces the flyash of a great deal of simultaneously.The method that electricity power enterprise generally adopts waterpower to carry, flyash and water are made certain density slip (that is to say buck), pass through slurry pump, it is pumped to storage ash field, buck at ash through natural subsidence, finished separating of flyash and water, clarifying water enters natural water by the overflow port of ash.Owing to have a certain amount of alkaline matter in the flyash,, make the overflow water of discharging be alkalescence and pollute natural water such as the calcium oxide of free state.Method of wastewater treatment at present commonly used has following two kinds: (1) acid-base neutralisation method: adopt industrial acids (sulfuric acid or hydrochloric acid) that the outer draining of ash disposal area is neutralized, the pH value that makes the pH value of outer draining reach national regulation is below 9; (2) stove cigarette ash water treating method: with under the admixture of buck, utilize boiler smoke to handle at flyash, thereby reach the effect that reduces grey water ph value.Along with international schedule is constantly put in environment protection, a large amount of industrial acids that the acid-base neutralisation method is used belong to the high-risk product, have certain application risk, drop into bigger simultaneously; The buck water quality instability that adopts stove cigarette ash water treating method to handle can not satisfy the qualified discharge standard of country fully.
Summary of the invention
The method that the purpose of this invention is to provide a kind of alkaline waste water treatment through aeration process, this method is simple and convenient, and is with low cost, environmental protection and processing effective.
The method of alkaline waste water treatment through aeration process of the present invention is to utilize aeration directly to inflate air in the alkaline waste water, makes carbon dioxide in air and alkaline waste water carry out neutralization reaction.
Adopt technique scheme, the present invention utilizes carbon dioxide in air gas and alkaline waste water to carry out neutralization reaction, thereby reduce the effect of alkaline waste water pH value, make its qualified discharge, method of the present invention can produce a certain amount of absorption to Atmospheric Carbon Dioxide simultaneously, has significant emission reduction effect.
Figure of description
Fig. 1 is the schema of treatment of Power buck of the present invention;
Fig. 2 is a partial schematic diagram among Fig. 1.
Embodiment
The method of alkaline waste water treatment through aeration process of the present invention, described aeration are to adopt aerator to inflate air to alkaline waste water.The aerator that aeration of the present invention uses is some.But utilize aerator one side alkalitropism waste water to charge into a large amount of air, can also constantly stir simultaneously the carrying out that quickens neutralization reaction, the aerator that general preferred use is suitably many can provide competent carbonic acid gas and alkaline waste water to carry out neutralization reaction like this, can also shorten the reaction times simultaneously.The method of alkaline waste water treatment through aeration process of the present invention, wherein said alkaline waste water are a fuel-burning power plant ash buck.Utilize aeration that carbon dioxide in air is charged into alkaline waste water and carry out neutralization reaction, this method is simple and convenient, and cheap and environmental protection does not have danger, can also effectively control the pH value of alkaline waste water simultaneously, and economic benefit and environmental benefit are remarkable.Be illustrated below by specific embodiment.
Embodiment
As shown in Figure 1, 2, wherein each label is as follows among the figure: the 10th, and power plant, the 20th, buck transport pipe, the 30th, ash disposal area, the 31st, aerator, the 32nd, an ash water port (overflow port), the 33rd, deposition flyash, the 34th, buck.The buck that power plant 10 discharges enters ash disposal area 30 through buck transport pipe 20, the ash of power plant is ash discharge water outside the venue, its alkali components is mainly calcium hydroxide, utilization is installed in the aerator 31 of an ash water port, in buck 34, charge into a large amount of air, make carbon dioxide in air and calcium hydroxide carry out neutralization reaction, concrete reaction formula is as follows:
CO
2+Ca(OH)
2→CaCO
3↓+Ca(HCO
3)
2????????(1)
Calcium hydroxide in carbon dioxide in air elder generation and the buck 34 reacts (1), along with constantly carrying out of reaction, the precipitation of calcium carbonate that generates forms deposition flyash 33, thereby the final Calcium hydrogen carbonate that generates reaches the purpose that reduces grey water ph value, and the pipeline of an ash water port 32 (overflow port) is arranged on the liquid level top of buck 34, begin draining from the top, guarantee reaction thoroughly, concrete testing data is as shown in the table:
| Aeration time (mins) | The ash water ph value |
| ??0 | ??10.05 |
| ??30 | ??9.46 |
| ??60 | ??8.85 |
| ??90 | ??8.16 |
Claims (4)
1. the method for an alkaline waste water treatment through aeration process, this method is to utilize aeration directly to inflate air in the alkaline waste water, makes carbon dioxide in air and alkaline waste water carry out neutralization reaction.
2. the method for alkaline waste water treatment through aeration process according to claim 1 is characterized in that: described aeration is to adopt aerator to inflate air to alkaline waste water.
3. the method for alkaline waste water treatment through aeration process according to claim 2, it is characterized in that: described aerator is some.
4. the method for alkaline waste water treatment through aeration process according to claim 2 is characterized in that: described alkaline waste water is a fuel-burning power plant ash buck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010046509A CN101767858A (en) | 2010-01-05 | 2010-01-05 | Method for alkaline waste water treatment through aeration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010046509A CN101767858A (en) | 2010-01-05 | 2010-01-05 | Method for alkaline waste water treatment through aeration process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101767858A true CN101767858A (en) | 2010-07-07 |
Family
ID=42500986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010046509A Pending CN101767858A (en) | 2010-01-05 | 2010-01-05 | Method for alkaline waste water treatment through aeration process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101767858A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293669A (en) * | 2015-11-12 | 2016-02-03 | 新疆天智辰业化工有限公司 | Method for adjusting pH value of alkaline waste water |
| 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 |
| CN110615517A (en) * | 2019-09-07 | 2019-12-27 | 山东九思新材料科技有限责任公司 | Alkaline silicon washing alkaline sewage treatment device and use method thereof |
| CN110981004A (en) * | 2019-12-05 | 2020-04-10 | 云南罗平锌电股份有限公司 | Treatment method of zinc smelting sewage |
-
2010
- 2010-01-05 CN CN201010046509A patent/CN101767858A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293669A (en) * | 2015-11-12 | 2016-02-03 | 新疆天智辰业化工有限公司 | Method for adjusting pH value of alkaline waste water |
| 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 |
| CN110615517A (en) * | 2019-09-07 | 2019-12-27 | 山东九思新材料科技有限责任公司 | Alkaline silicon washing alkaline sewage treatment device and use method thereof |
| CN110981004A (en) * | 2019-12-05 | 2020-04-10 | 云南罗平锌电股份有限公司 | Treatment method of zinc smelting sewage |
| CN110981004B (en) * | 2019-12-05 | 2022-05-03 | 云南罗平锌电股份有限公司 | Treatment method of zinc smelting sewage |
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Open date: 20100707 |