CN107445384A - A kind of steam stripping processing method of high ammonia-nitrogen wastewater - Google Patents
A kind of steam stripping processing method of high ammonia-nitrogen wastewater Download PDFInfo
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- CN107445384A CN107445384A CN201710887431.8A CN201710887431A CN107445384A CN 107445384 A CN107445384 A CN 107445384A CN 201710887431 A CN201710887431 A CN 201710887431A CN 107445384 A CN107445384 A CN 107445384A
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- Prior art keywords
- ammonia
- stripping
- nitrogen wastewater
- high ammonia
- stripping tower
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F2209/02—Temperature
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a kind of steam stripping processing method of high ammonia-nitrogen wastewater, belong to technical field of waste water processing, the steam stripping processing method of the high ammonia-nitrogen wastewater of the present invention, the high ammonia-nitrogen wastewater temperature that heating enters before stripping tower is to close to bubble point temperature, avoid low temperature high ammonia-nitrogen wastewater enter after stripping tower contact with high-temperature water vapor after water vapour largely occur to condense and cause to add the wastewater flow rate that stripping tower bottom is discharged, the dosage of live (open) steam can be reduced, the consumption of water vapour is reduced, ammonia removal efficiency is up to more than 99%.
Description
Technical field
The invention belongs to technical field of waste water processing, the stripping processing method technology neck of more particularly to a kind of high ammonia-nitrogen wastewater
Domain.
Background technology
Ammonia nitrogen waste water is mainly derived from the enterprises such as chemical industry, metallurgy, steel, and its ammonia nitrogen is mainly with ammonium salt or NH4OH form
It is present in waste water.The NH of ammonia nitrogen waste water3- N is a kind of unstable material, and nitration reaction can occur under microbial action,
The NO of generation2 -It is a kind of carcinogen, can also causes fetal anomaly and destroy the ability of remarks combination oxygen.Substantial amounts of ammonia nitrogen waste water
Direct discharge can stimulate the plant undue growth such as algae, there is the contamination phenomenon of the eutrophication such as Chi Hu, red tide, it is some of
Algae protein matter toxin can be enriched in aquatic biological body, and makes one to be poisoned by food chain.《Integrated wastewater discharge standard》
(GB8978-1996) strict regulation has been made in the discharge to nitrogen nitrogen：Primary standard is NH3- N mass concentration≤15mg/L；Two
Level standard is NH3- N mass concentration≤25mg/L, the enterprise of current domestic ammonia nitrogen waste water emission compliance is seldom, therefore, research
The denitrification treatment technology of exploiting economy, efficient ammonia nitrogen waste water, it has also become the Important Problems in ammonia nitrogenous wastewater treatment technology field.
The ammonia nitrogenous wastewater treatment technology of prior art is thrown for processing high concentration, the industrial wastewater of difficult degradation, general device
Provide larger, operating cost is high, and the operation to manufacturing enterprise adds larger burden.
The content of the invention
The present invention is to overcome problems of the prior art, there is provided a kind of steam stripping processing side of high ammonia-nitrogen wastewater
Method, heating avoid low temperature high ammonia-nitrogen wastewater from entering stripping into the high ammonia-nitrogen wastewater temperature before stripping tower to close to bubble point temperature
The wastewater flow rate that water vapour largely occurs to condense and causes to add the discharge of stripping tower bottom after being contacted after tower with high-temperature water vapor, can
The dosage of live (open) steam is reduced, reduces the consumption of water vapour, ammonia removal efficiency is up to more than 99%.
The present invention adopts the following technical scheme that to solve above-mentioned problems of the prior art.
A kind of steam stripping processing method of high ammonia-nitrogen wastewater, comprises the following steps：
S1, alkali mix：It will be mixed, adjusted in high ammonia-nitrogen wastewater and lime/milk of lime/sodium hydroxide input pH regulating reservoirs
The pH of high ammonia-nitrogen wastewater is 10.5~11.5, obtains alkali and mixes waste water；
S2, precipitation：The alkali obtained in step S2 mixes waste water and entered in sedimentation basin, precipitates spoil disposal.
S3, heating：High ammonia-nitrogen wastewater after the precipitation that will be obtained in step S2 is heated to 90~95 DEG C；
S4, stripping：High ammonia-nitrogen wastewater after being heated in step S3 enters stripping tower at the top of the stripping tower, and water vapour is from stripping
The bottom of tower enters stripping tower, high ammonia-nitrogen wastewater and water vapour counter current contacting mass transfer in stripping tower, and the waste water after stripping is by blowing
The bottom discharge of de- tower, the air of the ammonia containing free state are discharged by the top of fluidisation stripping tower；
S5, pH are adjusted back：Strong acid is added in waste water after the stripping obtained into step S4 to adjust back into pH, is inhaled using sulfuric acid
Receive the ammonia in the air of the step S4 ammonia containing free state.
Further, the stripping tower described in step S4, packed height >=6m, gas liquid ratio G/L are 2200~2300.
Further, the stripping tower described in step S4 is the mass ratio of bubble column, water vapour and high-concentration ammonia nitrogenous wastewater
For 0.07~0.9：1.
Further, the stripping tower described in step S4 is the mass ratio of valve tower, water vapour and high-concentration ammonia nitrogenous wastewater
For 0.11~0.15：1.
Further, the pH in step S5 after pH readjustments is 6.5~8.
Relative to prior art, the present invention achieves following beneficial effect：
(1) before high ammonia-nitrogen wastewater of the invention carries out stripping tower, precipitation spoil disposal is first carried out, effectively avoids high ammonia-nitrogen wastewater
Middle solid content reduces stripping inner-tower filling material fouling to the scape journey of follow-up stripping.
(2) present invention is heated to 90~95 DEG C to the high ammonia-nitrogen wastewater after precipitation, makes it into before stripping tower close to bubble point
Temperature, avoid low temperature high ammonia-nitrogen wastewater enter stripping tower after contact with high-temperature water vapor after water vapour largely occur condensation and cause
Add the wastewater flow rate of stripping tower bottom discharge.
(3) present invention is heated to 90~95 DEG C to the high ammonia-nitrogen wastewater after precipitation, makes it into before stripping tower close to bubble point
Temperature, the dosage of live (open) steam can be reduced, reduce the consumption of water vapour.
Embodiment
Below in conjunction with embodiments of the invention, the technical scheme of invention is clearly and completely described.Obviously, institute
The embodiment of description is only the part of the embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair
The scope of bright protection.
A kind of steam stripping processing method of high ammonia-nitrogen wastewater, comprises the following steps：
S1, alkali mix：It will be mixed, adjusted in high ammonia-nitrogen wastewater and lime/milk of lime/sodium hydroxide input pH regulating reservoirs
The pH of high ammonia-nitrogen wastewater is 10.5~11.5, obtains alkali and mixes waste water；
S2, precipitation：The alkali obtained in step S2 mixes waste water and entered in sedimentation basin, precipitates spoil disposal.High ammonia-nitrogen wastewater is blown
Before de- tower, precipitation spoil disposal is first carried out, effectively avoids solid content in high ammonia-nitrogen wastewater to the scape journey of follow-up stripping, reducing
Stripping inner-tower filling material fouling.
S3, heating：High ammonia-nitrogen wastewater after the precipitation that will be obtained in step S2 is heated to 90~95 DEG C；To the height after precipitation
Ammonia nitrogen waste water is heated to 90~95 DEG C, makes it into before stripping tower close to bubble point temperature, avoids low temperature high ammonia-nitrogen wastewater from entering and blow
The wastewater flow rate that water vapour largely occurs to condense and causes to add the discharge of stripping tower bottom after being contacted after de- tower with high-temperature water vapor.
In addition, the dosage of live (open) steam can be reduced, the consumption of water vapour is reduced.
S4, stripping：High ammonia-nitrogen wastewater after being heated in step S3 enters stripping tower at the top of the stripping tower, and water vapour is from stripping
The bottom of tower enters stripping tower, high ammonia-nitrogen wastewater and water vapour counter current contacting mass transfer in stripping tower, and the waste water after stripping is by blowing
The bottom discharge of de- tower, the air of the ammonia containing free state are discharged by the top of fluidisation stripping tower；
Preferable scheme, pH readjustments：Strong acid is added in waste water after the stripping obtained into step S4 to adjust back into pH, is adopted
With the ammonia in the air of the sulfuric acid absorption step S4 ammonia containing free state.
Preferable scheme, the stripping tower described in step S4, packed height >=6m, gas liquid ratio G/L are 2200~2300.
Preferable scheme, the stripping tower described in step S4 are the quality of bubble column, water vapour and high-concentration ammonia nitrogenous wastewater
Than for 0.07~0.09：1.
Preferable scheme, the stripping tower described in step S4 are the quality of valve tower, water vapour and high-concentration ammonia nitrogenous wastewater
Than for 0.08~0.1：1.
Preferable scheme, the pH in step S5 after pH readjustments are 6.5~8.
It is 3000~8000mg/L of ammonia nitrogen to composition and concentration, pH is 8~9 high ammonia-nitrogen wastewater, is used in actual production
The steam stripping processing method of the high ammonia-nitrogen wastewater of the present invention is handled, and ammonia-nitrogen content can reach in the waste discharge after processing
1~10mg/L, meet national grade one discharge standard, the steam consumption needed for waste water per ton is less than 100kg.
Claims (5)
1. the steam stripping processing method of a kind of high ammonia-nitrogen wastewater, it is characterised in that comprise the following steps：
S1, alkali mix：It will be mixed in high ammonia-nitrogen wastewater and lime/milk of lime/sodium hydroxide input pH regulating reservoirs, adjust high ammonia
The pH of nitrogen waste water is 10.5~11.5, obtains alkali and mixes waste water；
S2, precipitation：The alkali obtained in step S2 mixes waste water and entered in sedimentation basin, precipitates spoil disposal.
S3, heating：High ammonia-nitrogen wastewater after the precipitation that will be obtained in step S2 is heated to 90~95 DEG C；
S4, stripping：High ammonia-nitrogen wastewater after being heated in step S3 enters stripping tower at the top of the stripping tower, and water vapour is from stripping tower
Bottom enters stripping tower, high ammonia-nitrogen wastewater and water vapour counter current contacting mass transfer in stripping tower, and the waste water after stripping is by stripping tower
Bottom discharge, the air of the ammonia containing free state discharged by the top of fluidisation stripping tower；
S5, pH are adjusted back：Strong acid is added in waste water after the stripping obtained into step S4 to adjust back into pH, is walked using sulfuric acid absorption
Ammonia in the air of the rapid S4 ammonia containing free state.
2. the steam stripping processing method of a kind of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that in step S4
Described stripping tower, packed height >=6m, gas liquid ratio G/L are 2200~2300.
3. the steam stripping processing method of a kind of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that in step S4
Described stripping tower is bubble column, and the mass ratio of water vapour and high-concentration ammonia nitrogenous wastewater is 0.07~0.09：1.
4. the steam stripping processing method of a kind of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that in step S4
Described stripping tower is valve tower, and the mass ratio of water vapour and high-concentration ammonia nitrogenous wastewater is 0.11~0.15：1.
5. the steam stripping processing method of a kind of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that in step S5
PH after pH readjustments is 6.5~8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887431.8A CN107445384A (en) | 2017-09-27 | 2017-09-27 | A kind of steam stripping processing method of high ammonia-nitrogen wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887431.8A CN107445384A (en) | 2017-09-27 | 2017-09-27 | A kind of steam stripping processing method of high ammonia-nitrogen wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107445384A true CN107445384A (en) | 2017-12-08 |
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ID=60498344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710887431.8A Withdrawn CN107445384A (en) | 2017-09-27 | 2017-09-27 | A kind of steam stripping processing method of high ammonia-nitrogen wastewater |
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| CN (1) | CN107445384A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109912078A (en) * | 2019-03-29 | 2019-06-21 | 福建工程学院 | A kind of air alkali cleaning ammonia nitrogen blowing-off device and method |
| CN111072207A (en) * | 2019-12-13 | 2020-04-28 | 山东清博生态材料综合利用有限公司 | Treatment method and treatment device for high ammonia nitrogen wastewater of leather plant |
-
2017
- 2017-09-27 CN CN201710887431.8A patent/CN107445384A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109912078A (en) * | 2019-03-29 | 2019-06-21 | 福建工程学院 | A kind of air alkali cleaning ammonia nitrogen blowing-off device and method |
| CN111072207A (en) * | 2019-12-13 | 2020-04-28 | 山东清博生态材料综合利用有限公司 | Treatment method and treatment device for high ammonia nitrogen wastewater of leather plant |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171208 |
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| WW01 | Invention patent application withdrawn after publication |