CN101880095A - Novel ammonia-nitrogen waste water processing technology - Google Patents
Novel ammonia-nitrogen waste water processing technology Download PDFInfo
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- CN101880095A CN101880095A CN2009100267331A CN200910026733A CN101880095A CN 101880095 A CN101880095 A CN 101880095A CN 2009100267331 A CN2009100267331 A CN 2009100267331A CN 200910026733 A CN200910026733 A CN 200910026733A CN 101880095 A CN101880095 A CN 101880095A
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Abstract
The invention relates to a novel ammonia-nitrogen waste water processing technology, which is characterized in that: denitrifying agent is added in original waste water after being pre-treated, then the waste water is conveyed to an atomized tower to be pressurized so as to dissolve the gas and to be decompressed to be atomized by a gas dissolving pump, the atomized waste water is sprayed from the tower, so the ammonia gas and the nitrogen gas as well as the dissolved gas are released, a draught fan is used for pumping the released gas out of the tower through a gas-water separator, and the sprayed waste water re-enters a secondary or a multi-stage atomized tower to be circularly treated to be discharged until reaching the standard. The novel ammonia-nitrogen waste water processing technology has simple and convenient process and low investment expense, overcomes the weaknesses of the traditional technology, can reduce the construction cost of the device with the same scale by 50 percent, can reduce the remaining time of the waste water inside the device by 60 percent, can continuously run, is convenient to operate, is free from heating, can process the waste water completely under the natural condition and is free from the secondary pollution. The high-concentration ammonia nitrogen is recyclable, the installation of the device is convenient, and the construction period of the device is short and is one third of the similar device.
Description
Technical field
The present invention relates to a kind of ammonia nitrogen waste water treatment method.
Background technology
One of important indicator that trade effluent effluxes is NH3-N≤15mg/L (national grade one discharge standard), usually the ammonia-nitrogen content of trade effluent is 500～50000mg/L, even it is higher, as not the ammonia nitrogen removal in the waste water, will cause body eutrophication, waterplant (as algae) overgrowing, consume a large amount of oxygen, make the water body severe depletion of oxygen and cause aquatic organism death, body corruption, water quality deterioration.China is the country that water resources lacks, and limited water resource is destroyed, and has not only restricted Economic development, the more important thing is the destruction eubiosis, causes that weather degenerates, and brings on a disaster to the mankind.Therefore, the removal of ammonia nitrogen in the trade effluent becomes an important topic in the environmental engineering all the time.
China is the big country of Economic development, annual will have a large amount of ammonia nitrogen waste waters to produce, traditional biological process, physics method, physico-chemical process etc. are removed ammonia nitrogen and have not been satisfied current increasingly serious environment situation, must on original ammonia nitrogen removal method basis, constantly explore new advanced person's Technology, remedy the deficiency of traditional technology, and then ammonia nitrogenous wastewater treatment technology is reached a new high.
Summary of the invention
The present invention proposes the novel process that a kind of ammonia nitrogen waste water is handled, it has overcome the deficiency of existing ammonia nitrogen waste water treatment process, take into account that flow process is simple, reduced investment, energy consumption are low, technology maturation, control is convenient and the needs of non-secondary pollution, this technology can be removed the processing of ammonia nitrogen to the waste water that contains various concentration ammonia nitrogens, ammonia nitrogen waste water is handled through a materialization promptly can be reached national grade one discharge standard.
The object of the present invention is achieved like this, and concrete steps are:
Through pretreated raw wastewater, be transported to the denitrfying agent mixing tank by lift pump, flow automatically to the circulation groove of one-level atomisation tower bottom, pressurizeing and dissolve in air through the one-level air dissolved pump pumps into one-level atomisation tower top, fully atomizing under little condition of negative pressure.Waste water is under decompression atomizing situation, a large amount of ammonia nitrogen gas and the air that dissolves in are come out by abrupt release, liquid water from top to bottom, fall into the circulation groove of tower bottom with the fresh air counter current contact that rises, ammonia nitrogen gas that discharges and the fresh air that enters in the tower rise to cat head, discharge outside the tower behind water separator.
Because former ammonia nitrogen waste water is continuous water inlet, the air dissolved pump of one-level atomisation tower runs without interruption, make waste water pressure air-dissolving---decompression atomizing---the suction ammonia nitrogen gas circulation repeatedly in the one-level tower enter one-level atomisation tower bottom circulation groove, ammonia nitrogen in the water is constantly removed, when reaching certain clearance, enter second stage tower again, circulate according to same flow process, thereby further remove ammonia nitrogen.
Circulate when qualified when waste water enters the last step tower, can discharge, go waterways or recycling from the water port gravity flow.
From cats head at different levels ammonia nitrogen gas and the air that comes of overflowing is to take out through induced draft fan to draw, and when taking out bleed body ammonia nitrogen concentration when higher, but the deammoniation recovery system is recycled; When the ammonia nitrogen gas concentration is low, can be to airborne release.
Because ammonia nitrogen waste water concentration is different and different to ammonia nitrogen requirement in the draining, this technology will be taked different sum of series internal circulating loads, make every effort to that energy consumption and the control of interpolation pharmaceutical quantities is optimum.
The mechanism of action: add special agent and make that nitrogenous compound is converted into free ammonia nitrogen and nontoxic nitride faster in the waste water, the physicochemical property that change waste water are overflowed ammonia nitrogen gas smoothly, and the liquid film that produces is to gas, liquid phase plays buffer action, avoid the anti-molten of ammonia nitrogen gas, pressurization by air dissolved pump then, with the air in certain amount high dispersing in water, ammonia nitrogen in the water is produced extruding, the occupy-place effect, form the trend of a kind of " being triggered at any moment ", by special nozzle liquid phase is atomized again, making ammonia nitrogen gas break through liquid surrounds, simultaneously, ammonia in the liquid phase also spreads in microbubble, is taken out of liquid level in company with the rising of bubble by it, thereby realizes separating of gaseous state ammonia nitrogen and liquid phase.
Ammonia nitrogen is desorb from water, because under this process using low temperature (not heating) condition, no matter consider from the angle of chemical reaction, still consider from physicochemical angle, all can not disposablely reach national grade one discharge standard from high density, promptly below the 15mg/L, and the low more disposable clearance of concentration is low more, must progressively reduce ammonia nitrogen concentration by repeatedly circulation.
Embodiment
Embodiment 1
The present invention is described in further detail by embodiment in conjunction with the accompanying drawings:
Accompanying drawing is a process flow diagram of the present invention.
As shown in the figure, pretreated raw wastewater, be transported to denitrifier blender 1 by elevator pump, in blender 1, add the circulating slot 4 that denitrifier 2 flows automatically to one-level atomisation tower 3 bottoms, through one-level air dissolved pump 5 pressurization and dissolve in air and pump into one-level atomisation tower 3 tops, atomizing spray head 6 is established at the atomisation tower top, and waste water is fully atomizing under little condition of negative pressure. Waste water is in decompression atomizing situation, a large amount of ammonia nitrogen gas and the air that dissolves in are come out by abrupt release, aqueous water from top to bottom, fall into the circulating slot 4 of tower bottom with the fresh air counter current contacting that rises, the ammonia nitrogen gas that discharges and the fresh air that enters in the tower rise to cat head, behind separator 7 outside the discharge tower.
Because former ammonia nitrogen waste water is continuous water inlet, the air dissolved pump of one-level atomisation tower runs without interruption, so that the waste water that enters one-level atomisation tower bottom circulating slot pressure air-dissolving---decompression atomizing---suction ammonia nitrogen gas circulation repeatedly in first stage tower, ammonia nitrogen in the water is constantly removed, when reaching certain clearance, enter again second level tower or multi-stage column more, circulate according to same flow process, thereby further remove ammonia nitrogen.
Circulate when qualified when waste water enters the afterbody tower, can discharge from the discharge outlet gravity flow, go gutter or recycling.
From cats head at different levels ammonia nitrogen gas and the air that comes of overflowing is to take out through induced draft fan 8 to draw, and when taking out bleed body ammonia nitrogen concentration when higher, but the deammoniation recovery system is recycled; When the ammonia nitrogen gas concentration is low, can be to airborne release.
Because ammonia nitrogen waste water concentration is different and different to ammonia nitrogen requirement in the draining, this technology will be taked different sum of series internal circulating loads, make every effort to that energy consumption and the control of interpolation pharmaceutical quantities is optimum.
Claims (4)
1. ammonia nitrogen waste water New Process for Treatment, it comprises the following steps:
A. in pretreated raw wastewater, adding denitrfying agent;
B. entering atomisation tower utilizes air dissolved pump to carry out pressure air-dissolving and decompression atomizing;
C. the waste water after the atomizing sprays from tower and discharges ammonia nitrogen gas and molten gas;
D. with induced draft fan the gas that discharges is extracted out outside the tower through air water separator;
E. the waste water that sprays enters secondary or multistage atomizing tower circular treatment again until qualified discharge.
2. ammonia nitrogen waste water New Process for Treatment according to claim 1, it is characterized in that denitrfying agent is a special agent, its effect is to make in the waste water nitrogenous compound be converted into free ammonia nitrogen and nontoxic nitride faster, change the physicochemical property of waste water, help overflowing of ammonia nitrogen gas, gas, liquid in the wastewater treatment process is played buffer action, avoid the anti-molten of ammonia nitrogen gas;
3. ammonia nitrogen waste water New Process for Treatment according to claim 1 is characterized in that the purpose of removing ammonia nitrogen realizes that by pressure air-dissolving and decompression atomizing what molten gas and atomizing were adopted is the high pressure air dissolved pump;
4. ammonia nitrogen waste water New Process for Treatment according to claim 1, its feature cycle index and progression flexible, cycle index is directly proportional with running cost, and cycle index is many more, and cost is just high more.Can debug with engineering operation by experiment, find out optimum cycle number of times and progression parameter, improve each round-robin clearance, thereby reduce cycle index, reach the purpose that reduces running cost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100267331A CN101880095A (en) | 2009-05-05 | 2009-05-05 | Novel ammonia-nitrogen waste water processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100267331A CN101880095A (en) | 2009-05-05 | 2009-05-05 | Novel ammonia-nitrogen waste water processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101880095A true CN101880095A (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2009100267331A Pending CN101880095A (en) | 2009-05-05 | 2009-05-05 | Novel ammonia-nitrogen waste water processing technology |
Country Status (1)
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| CN (1) | CN101880095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249461A (en) * | 2018-01-25 | 2018-07-06 | 苏州聚智同创环保科技有限公司 | De- amine method of purification and equipment and application thereof |
| CN110407428A (en) * | 2019-08-15 | 2019-11-05 | 山东恒基农牧机械有限公司 | A kind of cultivation excrement treatment device |
-
2009
- 2009-05-05 CN CN2009100267331A patent/CN101880095A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249461A (en) * | 2018-01-25 | 2018-07-06 | 苏州聚智同创环保科技有限公司 | De- amine method of purification and equipment and application thereof |
| CN110407428A (en) * | 2019-08-15 | 2019-11-05 | 山东恒基农牧机械有限公司 | A kind of cultivation excrement treatment device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101110 |