CN106830258A - The reagent combination and application method of ammonia nitrogen in a kind for the treatment of PCB waste water - Google Patents
The reagent combination and application method of ammonia nitrogen in a kind for the treatment of PCB waste water Download PDFInfo
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- CN106830258A CN106830258A CN201710093470.0A CN201710093470A CN106830258A CN 106830258 A CN106830258 A CN 106830258A CN 201710093470 A CN201710093470 A CN 201710093470A CN 106830258 A CN106830258 A CN 106830258A
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- waste water
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses the reagent combination and application method of ammonia nitrogen in a kind for the treatment of PCB waste water, including following parts by weight component：20~40 parts of calcium hypochlorite, 10~20 parts of sodium hypochlorite, 3~5 parts of acid, 2~6 parts of alkali, 6~8 parts of sodium tungstate, 9~15 parts of aluminum oxide.The invention belongs to PCB technical field of waste water processing, the reagent combination component advantages of simple of ammonia nitrogen in the disclosed treatment PCB waste water of this programme, low cost, feed intake and application method is convenient, it is easy to industrialize the ammonia nitrogen in extensive treatment PCB waste water, can lower cost by the ammonia nitrogen purification in the cleaning waste water of alkali etching line, clearance is up to more than 99.95%.
Description
Technical field
The present invention relates to PCB technical field of waste water processing, a kind of reagent combination of ammonia nitrogen in treatment PCB waste water is specifically referred to
And application method.
Background technology
As the high speed development of electronics industry, the demand of printed wiring board are increasing, the production of PCB has turned into electronics
The important foundation industry of industry, and PCB industry contaminated wastewater is increasingly protruded also with the raising of environmental requirement, wherein containing ammonia nitrogen
The treatment of waste water has turned into the focus of industry concern at present.Ammonia nitrogen in PCB waste water essentially from alkali etching, alkali etching because
A large amount of to use the raw material such as ammoniacal liquor, ammonium chloride, ammonia nitrogen concentration is high in causing waste water.Ammonia nitrogen and ammonium salt are highly soluble in water, therefore
It is difficult to passing through physical method is precipitated purification, and too high ammonia nitrogen has a negative impact to ecology, the place of nitration denitrification
Reason method removal ammonia nitrogen is limited, and according to above-mentioned processing method, processing cost and operation require high, and enterprise is difficult to bear.
NH_3-N treating in PCB waste water, has become the problem in industry, for described problem, works out one specially
For the reagent combination and application method of the wastewater treatment, can lower cost the ammonia nitrogen in the cleaning waste water of alkali etching line is net
Change, as current problem demanding prompt solution.
The content of the invention
It is to solve above-mentioned existing problem, the invention provides a kind of reagent combination specifically designed for the wastewater treatment and uses
Method, can lower cost by the ammonia nitrogen purification in the cleaning waste water of alkali etching line, clearance is up to more than 99.95%.
The technical scheme that the present invention takes is as follows：The reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, including following weight
The component of number：20~40 parts of calcium hypochlorite, 10~20 parts of sodium hypochlorite, acid 3~5 parts, 2~6 parts of alkali, 6~8 parts of sodium tungstate,
9~15 parts of aluminum oxide.
Further, in a kind for the treatment of PCB waste water ammonia nitrogen reagent combination, including following parts by weight component：Secondary chlorine
40 parts of sour calcium, 20 parts of sodium hypochlorite, 5 parts of acid, 5 parts of alkali, 8 parts of sodium tungstate, 12 parts of aluminum oxide.
The invention also discloses a kind of application method of the reagent combination of ammonia nitrogen in treatment PCB waste water, comprise the following steps：
1) each component is weighed by weight；
2) nitrogen-containing wastewater is lifted in reactor with elevator pump, opens mixer and waste gas tower blower fan, reagent combination
Sequentially add in reactor and reacted according to sodium hypochlorite, calcium hypochlorite, aluminum oxide, sodium tungstate order；
3) bronsted lowry acids and bases bronsted lowry is sequentially added by weight, and regulation pH is that 5~10, ORP is 350~1100mv, the ammonia in waste water
Generation nitrogen is removed after nitrogen is reacted.
Calcium hypochlorite and sodium hypochlorite are used to remove the ammonia nitrogen in PCB waste water in this programme, and calcium hypochlorite is on the low side, greatly
Reduce production cost greatly, after adding sodium hypochlorite and calcium hypochlorite in the aqueous solution containing ammonia nitrogen, hypochlorous acid, hypochlorite from
Son can produce monochloro amine (NH with the reaction of the ammonia in water2Cl), dichlormaine (NHCl2) and three chloramines (NCl3).Due to NCl3In pH
<When 5.5 could stable existence, and solubility is very low in water, only 10-7Mol/L, so the NCl in the natural aqueous solution3It is several
Do not exist.Correlated response mechanism can be represented with following reaction equation：
The reaction of sodium hypochlorite and ammonia：
NaClO+H2O→HC1O+NaOH (1)
NH3+HC1O→NH2Cl+H2O (2)
NH2C1+HC1O→NHCl2+H2O (3)
NHCl2+H2O→NOH+2Cl-+2H+ (4)
NHCl2+NOH→N2↑+HC1O+H++Cl- (5)
Net reaction is：
2NH3+ 3NaClO=N2↑+3H2O+3NaCl (6)
The reaction of calcium hypochlorite and ammonia：
Ca(ClO)2+H2O+CO2→2HClO+CaCO3↓ (1)
NH3+HClO→NH2Cl+H2O (2)
NH2C1+HCIO→NHCI2+H2O (3)
NHC12+H2O→NOH+2C1-+2H+ (4)
NHCl2+NOH→N2↑+HC1O+H++C1- (5)
H++CaCO3→Ca++CO2↑+H2O (6)
Net reaction is：
4NH3+3Ca(ClO)2=2N2↑+3CaCl2+6H2O (7)
From the foregoing, it will be observed that sodium hypochlorite and calcium hypochlorite can remove the part ammonia nitrogen in PCB waste water, this programme is by for a long time
Experiment grope, optimal screening adjustment calcium hypochlorite and sodium hypochlorite to appropriate proportioning, and creativeness addition aluminum oxide and tungsten
Sour sodium adds appropriate soda acid adjustment pH value and ORP scopes as reaction promoter, finally makes the ammonia nitrogen in waste water in clearance bar high
Removed under part.
Using having the beneficial effect that the above-mentioned technical proposal present invention is obtained：Ammonia in the disclosed treatment PCB waste water of this programme
The reagent combination component advantages of simple of nitrogen, low cost, feeds intake and application method is convenient, is easy to industrialize treatment PCB on a large scale and gives up
Ammonia nitrogen in water, can lower cost by the ammonia nitrogen purification in the cleaning waste water of alkali etching line, clearance is up to more than 99.95%.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
The component of embodiment 1, the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, including following parts by weight：Hypochlorous acid
40 parts of calcium, 20 parts of sodium hypochlorite, 5 parts of acid, 5 parts of alkali, 8 parts of sodium tungstate, 12 parts of aluminum oxide.
The application method of the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, it is characterised in that comprise the following steps：
1) each component is weighed by weight；
2) nitrogen-containing wastewater is lifted in reactor with elevator pump, opens mixer and waste gas tower blower fan, reagent combination
Sequentially add in reactor and reacted according to sodium hypochlorite, calcium hypochlorite, aluminum oxide, sodium tungstate order；
3) bronsted lowry acids and bases bronsted lowry is sequentially added by weight, and regulation pH is that 5~10, ORP is 350~1100mv, the ammonia in waste water
Generation nitrogen is removed after nitrogen is reacted.
After using the reagent combination and application method of embodiment 1, concentration before ammonia nitrogen component reaction, concentration after reaction in waste water
And clearance is as follows：
| Sample ID (point position) | 1 well | 2 wells | 3 wells |
| Ammonia nitrogen concentration (mg/L) in raw water before reaction | |||
| Ammonia nitrogen concentration (mg/L) in water outlet after reaction | 9.4 | 3.03 | 8.94 |
| The clearance (%) of ammonia nitrogen in waste water | 99.96 | 99.98 | 99.97 |
The component of embodiment 2, the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, including following parts by weight：Hypochlorous acid
30 parts of calcium, 15 parts of sodium hypochlorite, 4 parts of acid, 6 parts of alkali, 7 parts of sodium tungstate, 10 parts of aluminum oxide.
The application method of the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, it is characterised in that comprise the following steps：
1) each component is weighed by weight；
2) nitrogen-containing wastewater is lifted in reactor with elevator pump, opens mixer and waste gas tower blower fan, reagent combination
Sequentially add in reactor and reacted according to sodium hypochlorite, calcium hypochlorite, aluminum oxide, sodium tungstate order；
3) bronsted lowry acids and bases bronsted lowry is sequentially added by weight, and regulation pH is that 5~10, ORP is 350~1100mv, the ammonia in waste water
Generation nitrogen is removed after nitrogen is reacted.
After using the reagent combination and application method of embodiment 2, concentration before ammonia nitrogen component reaction, concentration after reaction in waste water
And clearance is as follows：
| Sample ID (point position) | 4 wells | 5 wells | 6 wells |
| Ammonia nitrogen concentration (mg/L) in raw water before reaction | |||
| Ammonia nitrogen concentration (mg/L) in water outlet after reaction | 10.3 | 5.6 | 1.2 |
| The clearance (%) of ammonia nitrogen in waste water | 99.96 | 99.98 | 99.98 |
The component of embodiment 3, the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, including following parts by weight：Hypochlorous acid
35 parts of calcium, 10 parts of sodium hypochlorite, 5 parts of acid, 4 parts of alkali, 6 parts of sodium tungstate, 14 parts of aluminum oxide.
The application method of the reagent combination of ammonia nitrogen in a kind for the treatment of PCB waste water, it is characterised in that comprise the following steps：
1) each component is weighed by weight；
2) nitrogen-containing wastewater is lifted in reactor with elevator pump, opens mixer and waste gas tower blower fan, reagent combination
Sequentially add in reactor and reacted according to sodium hypochlorite, calcium hypochlorite, aluminum oxide, sodium tungstate order；
3) bronsted lowry acids and bases bronsted lowry is sequentially added by weight, and regulation pH is that 5~10, ORP is 350~1100mv, the ammonia in waste water
Generation nitrogen is removed after nitrogen is reacted.
After using the reagent combination and application method of embodiment 3, concentration before ammonia nitrogen component reaction, concentration after reaction in waste water
And clearance is as follows：
| Sample ID (point position) | 7 wells | 8 wells | 9 wells | 10 wells |
| Ammonia nitrogen concentration (mg/L) in raw water before reaction | ||||
| Ammonia nitrogen concentration (mg/L) in water outlet after reaction | 2.8 | 2.5 | 0.5 | 0.7 |
| The clearance (%) of ammonia nitrogen in waste water | 99.96 | 99.97 | 99.99 | 99.99 |
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (3)
1. in a kind for the treatment of PCB waste water ammonia nitrogen reagent combination, it is characterised in that the component including following parts by weight：Secondary chlorine
20~40 parts of sour calcium, 10~20 parts of sodium hypochlorite, 3~5 parts of acid, 2~6 parts of alkali, 6~8 parts of sodium tungstate, 9~15 parts of aluminum oxide.
2. in a kind for the treatment of PCB waste water according to claim 1 ammonia nitrogen reagent combination, it is characterised in that including as follows
The component of parts by weight：40 parts of calcium hypochlorite, 20 parts of sodium hypochlorite, 5 parts of acid, 5 parts of alkali, 8 parts of sodium tungstate, 12 parts of aluminum oxide.
3. in a kind for the treatment of PCB waste water the reagent combination of ammonia nitrogen application method, it is characterised in that comprise the following steps：
1) each component is weighed by weight；
2) nitrogen-containing wastewater is lifted in reactor, opening mixer and waste gas tower blower fan with elevator pump, reagent combination according to
Sodium hypochlorite, calcium hypochlorite, aluminum oxide, sodium tungstate order are sequentially added in reactor and reacted；
3) bronsted lowry acids and bases bronsted lowry is sequentially added by weight, and regulation pH is that 5~10, ORP is 350~1100mv, the ammonia nitrogen warp in waste water
Nitrogen is generated after reaction to be removed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710093470.0A CN106830258A (en) | 2017-02-21 | 2017-02-21 | The reagent combination and application method of ammonia nitrogen in a kind for the treatment of PCB waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093470.0A CN106830258A (en) | 2017-02-21 | 2017-02-21 | The reagent combination and application method of ammonia nitrogen in a kind for the treatment of PCB waste water |
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| CN106830258A true CN106830258A (en) | 2017-06-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996619A (en) * | 2018-08-23 | 2018-12-14 | 广东海瑞环保科技有限公司 | PCB nitrogen-containing wastewater processing system and its processing method |
| CN117884452A (en) * | 2024-03-15 | 2024-04-16 | 崇义章源钨业股份有限公司 | Method for treating ammonia-containing tungsten-containing slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0849227A2 (en) * | 1996-12-18 | 1998-06-24 | Kurita Water Industries Ltd. | Electrolytic treatment method for water-containing nitrogen compounds |
| CN105253986A (en) * | 2015-11-11 | 2016-01-20 | 中国电建集团中南勘测设计研究院有限公司 | Denitrogenation agent |
| CN105967315A (en) * | 2016-07-15 | 2016-09-28 | 盐城市沿海固体废料处置有限公司 | Device for efficient and continuous treatment of high ammonia-nitrogen wastewater and treatment method thereof |
-
2017
- 2017-02-21 CN CN201710093470.0A patent/CN106830258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0849227A2 (en) * | 1996-12-18 | 1998-06-24 | Kurita Water Industries Ltd. | Electrolytic treatment method for water-containing nitrogen compounds |
| CN105253986A (en) * | 2015-11-11 | 2016-01-20 | 中国电建集团中南勘测设计研究院有限公司 | Denitrogenation agent |
| CN105967315A (en) * | 2016-07-15 | 2016-09-28 | 盐城市沿海固体废料处置有限公司 | Device for efficient and continuous treatment of high ammonia-nitrogen wastewater and treatment method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996619A (en) * | 2018-08-23 | 2018-12-14 | 广东海瑞环保科技有限公司 | PCB nitrogen-containing wastewater processing system and its processing method |
| CN117884452A (en) * | 2024-03-15 | 2024-04-16 | 崇义章源钨业股份有限公司 | Method for treating ammonia-containing tungsten-containing slag |
| CN117884452B (en) * | 2024-03-15 | 2024-06-11 | 崇义章源钨业股份有限公司 | Method for treating ammonia-containing tungsten-containing slag |
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Application publication date: 20170613 |