CN108706672A - A kind of recycling processing method of ammonia nitrogen waste water - Google Patents
A kind of recycling processing method of ammonia nitrogen waste water Download PDFInfo
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- CN108706672A CN108706672A CN201810295182.8A CN201810295182A CN108706672A CN 108706672 A CN108706672 A CN 108706672A CN 201810295182 A CN201810295182 A CN 201810295182A CN 108706672 A CN108706672 A CN 108706672A
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- ammonium hydroxide
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1418—Recovery of products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/102—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- 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
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention discloses a kind of recycling processing methods of ammonia nitrogen waste water, include the following steps：The pH of ammonia nitrogen waste water is adjusted to 10~12, is absorbed by acid solution after being deaerated using deamination film, obtains deamination waste water and ammonia salt solution；It is passed through air to ammonia salt solution and carries out stripping, obtains stripping raffinate I and the I of gaseous mixture containing ammonia；Shell side is walked using absorbing liquid to absorb to containing ammonia gaseous mixture I, obtains the ammonium hydroxide that mass percent concentration is 1~12%；Ammonium hydroxide to 1~12% is passed through air progress stripping, obtains stripping raffinate II and the II of gaseous mixture containing ammonia；The ammonium hydroxide obtained by step (3) is absorbed to containing ammonia gaseous mixture II, obtains the ammonium hydroxide that mass percent concentration is 15~20%.On the one hand the recycling processing method of the present invention makes the ammonia nitrogen concentration in waste water be reduced to 100mg/L, can carry out further biochemical treatment to it；On the other hand it recycles the ammonia concn produced and reaches 15% or more, the ammonium hydroxide of high concentration can be used as the raw material in industrial production, realize the recycling treatment to ammonia nitrogen waste water.
Description
Technical field
The present invention relates to field of waste water treatment more particularly to a kind of recycling processing methods of ammonia nitrogen waste water.
Background technology
As common water body and atmosphere pollution, ammonia and nitrogen pollution can all generate great danger to human health and ecological pollution
Evil, ammonia nitrogen is one of the main oxygen consumption pollutant in water body, if being directly discharged into water body, easily causes the pollution of water body.China's ammonia
Nitrogen wastewater flow rate is big, wide, includes mainly the excretion of the industrial wastewaters such as petrochemical industry, metallurgy, pharmacy, chemical fertilizer and humans and animals
The secondary water outlet etc. of object, sanitary sewage, destructor plant.
The major technique of processing ammonia nitrogen waste water has at present：Biological denitrificaion, stripping, stripping, break point chlorination method, ion exchange
Method, chemical precipitation method, catalytic wet air oxidation, electroosmose process, liquid-film method and degassing embrane method etc..
Biological denitrificaion method is Treating Municipal Sewage and the most common method of industrial wastewater, is mainly being detested using microorganism
Under oxygen, anoxic or the biochemical treatments such as aerobic effect, ammonia nitrogen substances in water is made to be converted into nontoxic nitrogen, to reach removal
The purpose of ammonia and nitrogen pollution.But biological denitrificaion method is more demanding to waste water quality, be not suitable for low organic matter, high concentration, high salinity,
The denitrogenation of industrial wastewater difficult to degrade.
Catalytic wet air oxidation be generally only applicable to low concentration, water it is small ammonia nitrogen waste water processing, and oxidant cost compared with
Height, equipment investment are big.
Blow-off method is mainly used in high-concentration ammonia nitrogenous wastewater processing, but is asked in practical operation there are treatment effeciency is low
Topic, high gas-liquid ratio stripping processing cost is high, and be easy to cause secondary pollution.
Vaporizing extract process is mainly used for the processing of high-concentration ammonia nitrogenous wastewater, and treatment effeciency is high, but to equipment requirement height, processing cost
Height, investment are big.
The Chinese patent literature of Publication No. CN105906158A discloses a kind of hydrolysis acidification and is combined with ammonia-nitrogen desorption
Coal chemical industrial waste water preprocess method, by waste water level-one stripping to ammonia nitrogen 300mg/L, into hydrolysis acidification pool after carry out two level again
Stripping to ammonia nitrogen is less than 100mg/L, and the ammonia that stripping goes out uses outer row after soda acid multistage absorption.Although this method can handle ammonia nitrogen
Waste water, but the ammonia that stripping goes out cannot recycle the ammonia nitrogen in waste water, be caused to provide using outer row after soda acid multistage absorption
Source wastes.
Invention content
The present invention provides a kind of recycling processing methods of ammonia nitrogen waste water, and system can be recycled while handling ammonia nitrogen waste water
High concentration ammonium hydroxide is taken, realizes the recycling treatment of ammonia nitrogen waste water.
The present invention provides following technical solutions：
A kind of recycling processing method of ammonia nitrogen waste water, includes the following steps：
(1) pH of ammonia nitrogen waste water is adjusted to 10~12, is absorbed by acid solution after being deaerated using deamination film, it is useless to obtain deamination
Water and ammonia salt solution；
(2) pH of ammonia salt solution is adjusted to 10~12, and is heated to 50~100 DEG C, be passed through air and carry out stripping, obtain
The stripping raffinate I and I of gaseous mixture containing ammonia；
(3) ammonia gaseous mixture I will be contained and be passed through deamination membrane tube journey, absorbing liquid is walked shell side and absorbed to containing ammonia gaseous mixture I, obtained
The ammonium hydroxide that mass percent concentration is 1~12% absorbs tail gas and is passed through ammonia salt solution；
(4) 1~10% ammonium hydroxide is heated to 50~100 DEG C, is passed through air and carries out stripping, obtains stripping raffinate II and contain
Ammonia gaseous mixture II；
(5) ammonia gaseous mixture II will be contained and be passed through deamination membrane tube journey, the ammonium hydroxide that step (3) obtains walks shell side to containing ammonia gaseous mixture II
It is absorbed, obtains the ammonium hydroxide that mass percent concentration is 15~20%.
In the ammonia nitrogen waste water, ammonia nitrogen concentration is 1000mg/L or more.
Preferably, in step (1), control deamination waste water ammonia nitrogen concentration be 100mg/L hereinafter, the ammonia nitrogen of ammonia salt solution is dense
Degree is 10000~20000mg/L.
Biochemical treatment is carried out after adjusting the pH to 6~9 of deamination waste water.
In step (2), when carrying out stripping to ammonia salt solution, control gas liquid ratio is 60~500: 1, obtained gaseous mixture containing ammonia
A concentration of 10~200mg/L of ammonia in I；It is further preferred that control gas liquid ratio is 60~120: 1；What is obtained mixes containing ammonia
A concentration of 90~200mg/L of ammonia in gas I.
Preferably, stripping raffinate I merges with deamination waste water, and biochemical treatment is carried out after adjusting pH to 6~9.
In step (3), modulation operations parameter, so as to get ammonium hydroxide mass percent concentration be 8~12%.
Preferably, step (3) includes：
(3-1) will contain ammonia gaseous mixture I and be passed through deamination membrane tube journey, and absorbing liquid is walked shell side and absorbed to containing ammonia gaseous mixture I, obtained
To ammonium hydroxide, absorbs tail gas and be passed through ammonia salt solution；
(3-2) will contain ammonia gaseous mixture I and be passed through deamination membrane tube journey, and the ammonium hydroxide that previous step obtains walks shell side to containing ammonia gaseous mixture
I is absorbed；
(3-3) repeats step (3-2), until obtained ammonium hydroxide mass percent concentration is 8~12%.
In step (4), to 1~10% ammonium hydroxide carry out stripping when, control gas liquid ratio be 20~200: 1, obtain contain ammonia
A concentration of 200~1000mg/L of ammonia in gaseous mixture II；It is further preferred that control gas liquid ratio is 60~120: 1；It obtains
A concentration of 300~600mg/L of ammonia in the II of gaseous mixture containing ammonia.
Preferably, it in the stripping raffinate II reuses to step (3), is inhaled as absorbing liquid to containing ammonia gaseous mixture I
It receives.
Preferably, step (5) includes：
(5-1) will contain ammonia gaseous mixture II and be passed through deamination membrane tube journey, and the ammonium hydroxide that step (3) obtains walks shell side to containing ammonia gaseous mixture
II is absorbed, and ammonium hydroxide is obtained, and is absorbed tail gas and is passed through ammonia salt solution；
(5-2) will contain ammonia gaseous mixture II and be passed through deamination membrane tube journey, and the ammonium hydroxide that previous step obtains walks shell side to containing ammonia mixing
Gas II is absorbed；
(5-3) repeats step (5-2), until obtained ammonium hydroxide mass percent concentration is 15~20%.
Recycling the ammonium hydroxide that obtained mass percent concentration is 15~20% can be back in industrial production.
Preferably, the deamination film be hydrophobic microporous membrane, material be polypropylene, polyethylene, polytetrafluoroethylene (PTFE) or
Kynoar.
Preferably, in step (3) and step (5), gaseous mixture containing ammonia and absorbing liquid relative flow.
Compared with prior art, beneficial effects of the present invention are：
On the one hand the recycling processing method of the present invention is made in waste water by being enriched with to the ammonia nitrogen in ammonia nitrogen waste water
Ammonia nitrogen concentration is reduced to 100mg/L, can carry out further biochemical treatment to it；On the other hand the ammonia of high concentration is generated, then
Ammonia is absorbed with deamination film, so that deamination film both sides is generated higher ammonia partial pressure difference, obtains the ammonium hydroxide of higher concentration, then
It is absorbed by two level stripping and film, further increases the concentration of ammonium hydroxide, recycle the ammonia concn produced and reach 15%, high concentration
Ammonium hydroxide can be used as the raw material in industrial production, realize the recycling treatment to ammonia nitrogen waste water.
Description of the drawings
Fig. 1 is the flow diagram of recycling processing method of the present invention.
Specific implementation mode
Embodiment 1
The waste water generated in certain dyestuff company production process, after measured, wastewater pH 3, COD 1300mg/L, ammonia nitrogen is
1000mg/L, conductivity 2.15ms/cm.
Follow the steps below processing：
(1) ammonia nitrogen waste water 500L is taken, its pH is adjusted to 11, deamination is carried out using deamination film, obtaining ammonia nitrogen concentration is
The ammonium sulfate 21L of the deamination waste water of 50mg/L and 10% (mass fraction) left and right, the ammonia nitrogen concentration of ammonium sulfate are
18840mg/L；
(2-1) takes 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, logical with the speed of 2L/min
The air entered carries out stripping 1h, obtains the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1100mg/L；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 800mL clear water, obtains 1.32% ammonium hydroxide (ammonia nitrogen
A concentration of 10885mg/L)；
(2-2) continues to take 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, with the speed of 2L/min
It spends the air being passed through and carries out stripping 1h, obtain the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1100mg/L；
At a temperature of -5 DEG C, the ammonium hydroxide obtained using previous step carries out film absorption to containing ammonia gaseous mixture, obtains certain ammonia nitrogen
The ammonium hydroxide of concentration；
Step (2-2) is repeated, after stripping handles 12L ammonium sulfates, obtaining 10.01% ammonium hydroxide, (ammonia nitrogen concentration is
82480mg/L)；
Remaining ammonium sulfate is continued with using the above method；
Deamination waste water and stripping raffinate merge, and pH carries out biochemical treatment after being adjusted to 6~9；
10.01% ammonium hydroxide that (3-1) takes 1L steps (2-2) to obtain is heated to 80 DEG C, is passed through with the speed of 2L/min
Air carries out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 1.5% or so；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 10.01% isometric ammonium hydroxide, obtains 13.9%
Ammonium hydroxide (ammonia nitrogen concentration 114470mg/L)；
10.01% ammonium hydroxide that (3-2) continues that 1L steps (2-2) is taken to obtain is heated to 80 DEG C, logical with the speed of 2L/min
The air entered carries out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 1.5% or so；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 13.9% ammonium hydroxide of isometric step (3-1),
Obtain 16% or so ammonium hydroxide；
Reuse absorbs gaseous mixture containing ammonia to step (2-1) as absorbing liquid after 1.5% or so stripping raffinate cooling.
16% or so obtained ammonium hydroxide can be back in industrial production.
Embodiment 2
The waste water generated in certain dyestuff company production process, after measured, wastewater pH 3, COD 1300mg/L, ammonia nitrogen is
1000mg/L, conductivity 2.15ms/cm.
Follow the steps below processing：
(1) ammonia nitrogen waste water 500L is taken, its pH is adjusted to 11, deamination is carried out using deamination film, obtaining ammonia nitrogen concentration is
The ammonium sulfate 21L of the deamination waste water of 50mg/L and 10% (mass fraction) left and right, the ammonia nitrogen concentration of ammonium sulfate are
18840mg/L；
(2-1) takes 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, logical with the speed of 1L/min
The air entered carries out stripping 1h, obtains the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1500mg/L；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 800mL clear water, obtaining 2.0% ammonium hydroxide, (ammonia nitrogen is dense
Degree is 16470mg/L)；
(2-2) continues to take 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, with the speed of 1L/min
It spends the air being passed through and carries out stripping 1h, obtain the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1500mg/L；
At a temperature of -5 DEG C, the ammonium hydroxide obtained using previous step carries out film absorption to containing ammonia gaseous mixture, obtains certain ammonia nitrogen
The ammonium hydroxide of concentration；
It repeats step (2-2) and obtains 10% ammonium hydroxide after stripping handles 10L ammonium sulfates；
Remaining ammonium sulfate is continued with using the above method；
Deamination waste water and stripping raffinate merge, and pH carries out biochemical treatment after being adjusted to 6~9；
10% ammonium hydroxide that (3-1) takes 1L steps (2-2) to obtain is heated to 80 DEG C, the air being passed through with the speed of 2L/min
Carry out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 1.5% or so；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 10% isometric ammonium hydroxide, obtains 13.7%
Ammonium hydroxide；
10% ammonium hydroxide that (3-2) continues that 1L steps (2-2) is taken to obtain is heated to 80 DEG C, is passed through with the speed of 2L/min
Air carries out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 1.5% or so；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 13.7% ammonium hydroxide of isometric step (3-1),
Obtain 15.9% or so ammonium hydroxide；
Reuse absorbs gaseous mixture containing ammonia to step (2-1) as absorbing liquid after 1.5% or so stripping raffinate cooling.
15.9% or so obtained ammonium hydroxide can be back in industrial production.
Embodiment 3
The waste water generated in certain dyestuff company production process, after measured, wastewater pH 3, COD 1300mg/L, ammonia nitrogen is
1000mg/L, conductivity 2.15ms/cm.
Follow the steps below processing：
(1) ammonia nitrogen waste water 500L is taken, its pH is adjusted to 11, deamination is carried out using deamination film, obtaining ammonia nitrogen concentration is
The ammonium sulfate 21L of the deamination waste water of 50mg/L and 10% (mass fraction) left and right, the ammonia nitrogen concentration of ammonium sulfate are
18840mg/L；
(2-1) takes 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, logical with the speed of 2L/min
The air entered carries out stripping 1h, obtains the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1100mg/L；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 800mL clear water, obtains 1.32% ammonium hydroxide (ammonia nitrogen
A concentration of 10885mg/L)；
(2-2) continues to take 1L ammonium sulfates, its pH is adjusted to after 11, temperature is increased to 80 DEG C, with the speed of 2L/min
It spends the air being passed through and carries out stripping 1h, obtain the stripping raffinate and gaseous mixture containing ammonia that ammonia nitrogen concentration is 1100mg/L；
At a temperature of -5 DEG C, the ammonium hydroxide obtained using previous step carries out film absorption to containing ammonia gaseous mixture, obtains certain ammonia nitrogen
The ammonium hydroxide of concentration；
Step (2-2) is repeated, after stripping handles 12L ammonium sulfates, obtaining 10.01% ammonium hydroxide, (ammonia nitrogen concentration is
82480mg/L)；
Remaining ammonium sulfate is continued with using the above method；
Deamination waste water and stripping raffinate merge, and pH carries out biochemical treatment after being adjusted to 6~9；
10.01% ammonium hydroxide that (3-1) takes 1L steps (2-2) to obtain is heated to 80 DEG C, is passed through with the speed of 1L/min
Air carries out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 2% or so；
At a temperature of -5 DEG C, film absorption is carried out to containing ammonia gaseous mixture using 10.01% isometric ammonium hydroxide, is obtained
15.92% ammonium hydroxide (ammonia nitrogen concentration 131080mg/L)；
10.01% ammonium hydroxide that (3-2) continues that 1L steps (2-2) is taken to obtain is heated to 80 DEG C, logical with the speed of 1L/min
The air entered carries out stripping 1h, the stripping raffinate and gaseous mixture containing ammonia for obtaining 2% or so：
At a temperature of -5 DEG C, film suction is carried out to containing ammonia gaseous mixture using 15.92% ammonium hydroxide of isometric step (3-1)
It receives, obtains 19% or so ammonium hydroxide；
Reuse absorbs gaseous mixture containing ammonia to step (2-1) as absorbing liquid after 2% or so stripping raffinate cooling.
19% or so obtained ammonium hydroxide can be back in industrial production.
Technical scheme of the present invention and advantageous effect is described in detail in embodiment described above, it should be understood that
Above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all to be done in the spirit of the present invention
Any modification, supplementary, and equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of recycling processing method of ammonia nitrogen waste water, which is characterized in that include the following steps：
(1) pH of ammonia nitrogen waste water is adjusted to 10~12, is absorbed by acid solution after being deaerated using deamination film, obtain deamination waste water and
Ammonia salt solution；
(2) pH of ammonia salt solution is adjusted to 10~12, and is heated to 50~100 DEG C, be passed through air and carry out stripping, obtain stripping
The raffinate I and I of gaseous mixture containing ammonia；
(3) ammonia gaseous mixture I will be contained and be passed through deamination membrane tube journey, absorbing liquid is walked shell side and absorbed to containing ammonia gaseous mixture I, and quality is obtained
The ammonium hydroxide that percent concentration is 1~12% absorbs tail gas and is passed through ammonia salt solution；
(4) 1~10% ammonium hydroxide is heated to 50~100 DEG C, is passed through air and carries out stripping, obtain stripping raffinate II and mixed containing ammonia
Close gas II；
(5) ammonia gaseous mixture II will be contained and be passed through deamination membrane tube journey, the ammonium hydroxide that step (3) obtains is walked shell side and carried out to containing ammonia gaseous mixture II
It absorbs, obtains the ammonium hydroxide that mass percent concentration is 15~20%.
2. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that in step (2), to ammonia salt
When solution carries out stripping, control gas liquid ratio is 60~500: 1；A concentration of the 10 of ammonia in the obtained I of gaseous mixture containing ammonia~
200mg/L。
3. the recycling processing method of ammonia nitrogen waste water according to claim 1 or 2, which is characterized in that stripping raffinate I with it is de-
Ammonia waste water merges, and biochemical treatment is carried out after adjusting pH to 6~9.
4. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that in step (3), modulation behaviour
Make parameter, so as to get ammonium hydroxide mass percent concentration be 8~12%.
5. the recycling processing method of ammonia nitrogen waste water according to claim 4, which is characterized in that step (3) includes：
(3-1) will contain ammonia gaseous mixture I and be passed through deamination membrane tube journey, and absorbing liquid is walked shell side and absorbed to containing ammonia gaseous mixture I, and ammonia is obtained
Water absorbs tail gas and is passed through ammonia salt solution；
(3-2) will contain ammonia gaseous mixture I and be passed through deamination membrane tube journey, the ammonium hydroxide that previous step obtains walk shell side to contain ammonia gaseous mixture I into
Row absorbs；
(3-3) repeats step (3-2), until obtained ammonium hydroxide mass percent concentration is 8~12%.
6. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that in step (4), to 1~
When 12% ammonium hydroxide carries out stripping, control gas liquid ratio is 20~200: 1；Ammonia is a concentration of in the obtained II of gaseous mixture containing ammonia
200~1000mg/L.
7. the recycling processing method of ammonia nitrogen waste water according to claim 1 or 6, which is characterized in that the stripping is residual
In liquid II reuses to step (3), absorbed as absorbing liquid to containing ammonia gaseous mixture I.
8. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that step (5) includes：
(5-1) will contain ammonia gaseous mixture II and be passed through deamination membrane tube journey, the ammonium hydroxide that step (3) obtains walk shell side to contain ammonia gaseous mixture II into
Row absorbs, and obtains ammonium hydroxide, absorbs tail gas and is passed through ammonia salt solution；
(5-2) will contain ammonia gaseous mixture II and be passed through deamination membrane tube journey, and the ammonium hydroxide that previous step obtains walks shell side to containing ammonia gaseous mixture II
It is absorbed；
(5-3) repeats step (5-2), until obtained ammonium hydroxide mass percent concentration is 15~20%.
9. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that the deamination film is thin
Aqueous microporous barrier, material are polypropylene, polyethylene, polytetrafluoroethylene (PTFE) or Kynoar.
10. the recycling processing method of ammonia nitrogen waste water according to claim 1, which is characterized in that step (3) and step
(5) in, gaseous mixture containing ammonia and absorbing liquid relative flow.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110575744A (en) * | 2019-10-09 | 2019-12-17 | 江苏沃德凯环保科技有限公司 | Special fabric ammonia-containing waste gas circulating purification and recovery process |
| CN113880314A (en) * | 2021-11-10 | 2022-01-04 | 广东工业大学 | Treatment method and treatment system for obtaining ammonia water from ammonia nitrogen wastewater |
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