CN101234791A - Hypergravity purifying method for ammonia nitrogen sewage and hypergravity machine used in the same - Google Patents
Hypergravity purifying method for ammonia nitrogen sewage and hypergravity machine used in the same Download PDFInfo
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- CN101234791A CN101234791A CNA2008101009101A CN200810100910A CN101234791A CN 101234791 A CN101234791 A CN 101234791A CN A2008101009101 A CNA2008101009101 A CN A2008101009101A CN 200810100910 A CN200810100910 A CN 200810100910A CN 101234791 A CN101234791 A CN 101234791A
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Abstract
The invention discloses a hyper-gravity purification method for ammonia and nitrogen sewage. In the method, a blowing and doff hyper gravity machine is first utilized to carry out a blowing and doff treatment to the sewage. An absorption hyper gravity machine is then utilized to carry out an ammonia removal treatment to the gas concluding ammonia outputted by the blowing and doff hyper gravity machine. The invention also discloses a hyper-gravity machine, which comprises a sealed shell. The top of the shell is provided with a gas inlet and the bottom of the shell is provided with a liquid discharge outlet. A round cylinder shape rotary drum is arranged inside the shell. The surrounding of the drum is densely covered by pylomes. A baffle group is arranged inside the drum. In the central of the drum, a pylome is arranged which is communicated with the gas outlet and liquid inlet on the shell. The hyper gravity blowing and doff hyper technology in the invention is a novel mass-transfer technology which can reduce the tower height, strengthen the mass-transfer and reduces the pressure drop. When hyper gravity blowing and doff hyper technology is used for treating the leachate of the landfill, on one hand, the operation cost can be saved, on the another hand, the recycled ammonium sulfate can be used as fertilizer.
Description
Technical field
The present invention relates to a kind of method of removing ammonia in the ammonia-nitrogen sewage, and employed overweight machine in this method.
Background technology
Consumer waste infiltration liquid is the extraordinary sewage that the garbage loading embeading process is produced, and its ammonia nitrogen concentration is up to several thousand milligrams of every liter of numbers, and along with the growth at garbage loading embeading age, the ammonia content in the percolate also will rise gradually.The ammonia-containing water of these high densitys will produce many harm.
(1) causes the eutrophication of water body.Because ammonia nitrogen is the main nutrient matter of plant and microorganism, the increase of ammonia-nitrogen content can cause the eutrophication of water body in the water body, promote algae reproduction in the water, dissolved oxygen in a large amount of breeding meeting consume water of algae, death of algae and corruption can cause a large amount of minimizings of water oxygen again, make water quality deterioration, and fish and other aquatic organism will be dead because of anoxic, the water body blackout is fouled, cause water quality deterioration.
The serious several times marine red tide of Fa Shenging is just closely related with polluted by nitrogen in recent years.Planktonic algae is the basis of Marine ecosystems.Under normal circumstances, the planktonic algae on the sea rely on that marine bottom makes progress that mobile is nitrogenous, the current of phosphorus and surviving.If but nutritive substance is abundant in the seawater, planktonic algae will excess growth, makes seawater become green, redness or brown, Here it is red tide.Discoloured water when red tide takes place, the dead floating sea of fishes and shrimps corpse, shellfish dies off, and sea wind blows and transmits a burst of unpleasant smelling as of rotten fish.Calendar year 2001 China marine site generation red tide reaches 77 times, 2002 79 times, 2003 119 times, 2004 96 times, has caused very serious economy loss.
(2) ammonia and nitrogen pollution threatens species diversity.NH in water body
3-N＞1mg/L will make the ability drop of biological blood in conjunction with oxygen; Work as NH
3-N＞3mg/L, most of fish such as goldfish and bream and aquatic organism will be dead in 24-96 hour.Ammonia nitrogen under the effect of dissolved oxygen, Nitrosomas, Nitromonas, produces NO in water body in addition
2 -And NO
3 -, and NO
2 -And NO
3 -Be the predecessor of nitrosamine, nitrosamine is a carcinogenic substance, and is very big to people's threat.Human body is if drunk NO
2-N＞10mg/L or NO
3The water of-N＞50mg/L then can make the interior normal oxyphorase of human body be oxidized to methemoglobin, loses the oxyphorase ability of delivery of oxygen in vivo, the anoxybiotic symptom occurs.Therefore the safe level of nitrite is below the 1mg/L in the water.
The concentration of ammonia nitrogen is to estimate an important indicator of water pollution degree in the water body.The ammonia nitrogen index has become second principal pollutant except that permanganate index in the water pollution of present China.According to national Environmental statistics communique year by year, discharge of wastewater presents the trend of increase, and along with the increase of wastewater discharge and pollutent, the investment that China is used for prevention and cure of pollution also presents the trend of increase.
At present, the treatment technology of ammonia-containing water can be divided into two big classes: a class is the physical chemistry treatment technology, comprises stripping (or stripping), precipitation, film absorption, wet oxidation etc., and another kind of technology is a bio-denitrification technology, and these methods respectively have characteristics.
The wastewater biochemical deamination is to utilize bacterium that ammonia is converted into nitrogen and the result that reaches purification of waste water, and this method is effective, uses more extensive.But biochemical process is handled strong ammonia wastewater very big difficulty is arranged.On the one hand, in order to make the microorganism normal growth, must increase refluxes recently dilutes raw wastewater; On the other hand, not only nitrifying process needs a large amount of oxygen, and the carbon source that denitrification need be a large amount of, and this certainly will increase by cost for the processing of the percolate of high ammonia nitrogen, low carbon source.
The technological operation of physico-chemical process deamination is easy, energy consumption is low, effect stability, is suitable for the processing of high-content ammonia-containing water.Wherein the stripping technology is to add alkali in solution, makes ammonia be converted into the form of free ammonia, utilizes air or water vapour stripping to come out again.This technology is simple, high efficiency, reduced investment.For the processing of percolate, be undoubtedly a kind of technology of first-selection.
At present, the stripping technology of the existing strong ammonia wastewater of China is mainly utilized stripping tower, common stripping tower height 5-10 rice, vapour-liquid ratio is about 5000, and gas enters at the bottom of tower, comes out from cat head, ammonia-containing water carries out gas-liquid mass transfer and is purified under alkaline condition, be the ammonia secondary pollution air of avoiding stripping to come out, mixed gas enters the absorption tower again after stripping tower comes out, be achieved continuous purification.As Chinese patent 96233019.1,01274455.7,200520013771.0 and 200620134482.0 treatment technologies of being put down in writing, these technology are conventional towers owing to what adopt, thereby need take bigger space, in addition, its mass-transfer efficiency and Energy Efficiency Ratio are also very limited.
Summary of the invention
At the problem that prior art exists, primary and foremost purpose of the present invention is to provide a kind of hypergravity purifying method of ammonia-nitrogen sewage, and the present invention also provides employed a kind of overweight machine in the aforesaid method further.
For achieving the above object, purifying method of the present invention is specific as follows:
The pH value of ammonia-containing water is adjusted to 10-11, by pump waste water is delivered in the rotary drum inner chamber in the overweight machine of stripping, utilize gas blower that air is sent in the rotary drum inner chamber in the overweight machine of stripping simultaneously, waste water is under the rotary drum action of centrifugal force, contact with the air of sending into is reverse, and mass transfer takes place remove ammonia, remove the waste water behind the ammonia then and contain ammonia gas and from rotary drum, discharge respectively; Be admitted to in the overweight machine of the absorption of spline structure from the ammonia gas that contains of the overweight machine output of stripping, in absorbing overweight machine, send into absorption liquid by pump simultaneously, in the rotary drum in absorbing overweight machine, absorption liquid is under the rotary drum action of centrifugal force, with containing of sending into, ammonia gas is reverse to be contacted, the promoting the circulation of qi liquid mass transfer of going forward side by side is removed ammonia, and absorption liquid enters and absorbs the liquid bath from absorbing overweight machine then, recirculation is used after removing wherein ammonia react resultant by any means known, and the gas that removes behind the ammonia then is discharged in the atmosphere.
Further, described absorption liquid is a sulphuric acid soln.
Employed a kind of overweight machine in the aforesaid method, this overweight machine comprises airtight shell, this shell upper is provided with the gas inlet, the bottom is provided with liquid outlet, be provided with cylindric rotary drum in it, the axial end of rotary drum is fixed on the back shaft, be densely covered with through hole on the rotary drum periphery, be disposed radially baffle groups in the rotary drum, the ring-type traverse baffle that this baffle groups is provided with one heart and alternately is fixed on one by one on the axial two side of rotary drum by several constitutes, the axial length of traverse baffle is less than the axial length of rotary drum inner chamber, the other end sidewall relative with described back shaft on the rotary drum is provided with a central through hole, at this central through hole place, rotatable airtight joining between rotary drum sidewall and the side wall of outer shell, shell is provided with the pneumatic outlet that is connected with central through hole on the rotary drum, and liquid inlet place fixed liquid input tube extend in the rotary drum inner chamber by the central through hole on the rotary drum is unsettled on the shell.
Further, also be provided with the baffling ring of radial width on described each traverse baffle surface, the common formation of this baffling ring and its place traverse baffle one T type baffling section less than adjacent two baffle(s) spacings.
Hypergravity stripping technology of the present invention is a kind of novel mass transfer technology, and tower height is reduced, and mass transfer is strengthened, and pressure drop reduces.This technical finesse percolate from garbage filling field can be saved running cost on the one hand, and the sulphur ammonium of Hui Shouing also can be made chemical fertilizer and use on the other hand.The present invention adopts the rotary packed bed treating refuse percolate of baffling, is about 11 in the pH value, and rotating speed is 800r/min-1000r/min, vapour-liquid ratio is 2000, is about 30 ℃ in temperature, and one way stripping rate can reach more than 85%, even 92%, compare with the stripping technology of having reported, improved efficient.
Description of drawings
Fig. 1 is the hypergravity purifying method schematic flow sheet of ammonia-nitrogen sewage of the present invention;
Gas-liquid mass transfer structural representation when Fig. 2 uses as the overweight machine of absorption for the overweight machine of the present invention;
Gas-liquid mass transfer structural representation when Fig. 3 uses as the overweight machine of stripping for the overweight machine of the present invention;
Fig. 4 is drum structure synoptic diagram in the overweight machine of the present invention;
Fig. 5 is an A-A sectional view among Fig. 4.
1 blower fan among the figure, 2 under meters, the overweight machine of 3 strippings, 3-1 rotary drum, 4 bearing supports, 5 motors, 6 bearings, 7 absorb liquid bath, 8 acid proof pumps, 9 water pumps, 10 wastewater troughs, 11 absorb overweight machine, 3-1-1 rotary drum housing, ring baffle plate in the 3-1-2 rotary drum, the through hole on the 3-1-3 rotary drum periphery.
Embodiment
As shown in Figure 1, and referring to Fig. 2, Fig. 3, when utilizing the inventive method that ammonia-nitrogen sewage is carried out purifying treatment, at first in wastewater trough 10, sewage pH value is adjusted to 10-11, and by water pump 9 and under meter 2 sewage is quantitatively sent among the rotary drum 3-1 in the overweight machine 3 of stripping, utilize Root's blower 1 and under meter 2 quantitatively in the overweight machine of stripping, to carry air simultaneously; Be accompanied by the input of sewage, rotary drum 3-1 is rotary work under motor 5 drives simultaneously, make that its interior sewage of input is thrown away laterally under centrifugal action, until the through hole 3-1-3 from rotary drum 3-1 periphery, throw away in the overweight machine inner chamber outside the rotary drum 3-1, and the ammonia sewage outlet that removes that finally is provided with from overweight machine shell is discharged; Sewage from the center that is imported into rotary drum 3-1 to the process that is thrown out of rotary drum 3-1, enter the rotary drum inner chamber from the through hole 3-1-3 of air while on rotary drum 3-1 periphery of gas inlet input, thereby form countercurrent flow with sewage, make ammonia mass transfer contained in the sewage in air, and taken away by air, the stripping of realizing sewage removes ammonia treatment, and the air that enters rotary drum 3-1 inner chamber is finally discharged from the ammonia gas outlet that contains that overweight machine shell is provided with; Remove sewage behind the ammonia from what the overweight machine of stripping 3 was discharged, directly discharged or carry out subsequent disposal again, the ammonia gas that contains of discharging from the overweight machine 3 of stripping then is transfused to and absorbs overweight machine 11, carries out the absorption of ammonia and handles; It is identical with the structure and the mode of operation of the overweight machine 3 of stripping to absorb overweight machine 11, just input is to contain ammonia gas and absorption liquid, what export is that the mass transfer that contains between ammonia air and the absorption liquid is to finish in the two countercurrent flow process in the rotary drum inner chamber equally except that clean air behind the ammonia and the absorption liquid that has absorbed ammonia; Absorb overweight machine 11 and can use sulphuric acid soln as absorption liquid, the sulphur ammonium that reclaims wherein from the absorption liquid that absorbs overweight machine 11 discharges can be used for making chemical fertilizer, and the absorption liquid behind the removal sulphur ammonium then can be sent absorption liquid bath 7 once more back to and be recycled.
Shown in Fig. 2-5, stripping is overweight machine 3 or absorb overweight machine 11 by airtight shell and in rotary drum 3-1 be set constitute, overweight machine shell upper is provided with the gas inlet, the bottom is provided with liquid outlet, rotary drum 3-1 has housing 3-1-1 cylindraceous, rotary drum 3-1 installs in the enclosure by steady bearing is rotatable, be densely covered with through hole 3-1-3 on the housing 3-1-1 periphery, be disposed radially baffle groups in the housing 3-1-1, the ring-type traverse baffle 3-1-2 that this baffle groups is provided with one heart and alternately is fixed on one by one on the axial two side of housing 3-1-1 by several constitutes, the axial length of traverse baffle 3-1-2 is less than the axial length of housing 3-1-1 inner chamber, housing 3-1-1 goes up the other end sidewall relative with its steady bearing and is provided with a central through hole, at this central through hole place, rotatable airtight joining between housing 3-1-1 sidewall and the overweight machine side wall of outer shell, the pneumatic outlet that is provided with on the overweight machine shell is by central through hole and its intracavity inter-connection on the housing 3-1-1, and the liquid input tube that the place, liquid inlet fixedly installs on the overweight machine shell then extend in its inner chamber by the central through hole on the housing 3-1-1 is unsettled.In order further to strengthen the baffling effect, also be provided with the baffling ring of twice radial width on each traverse baffle 3-1-2 surface, the common formation of this baffling ring and its place traverse baffle one T type baffling section less than adjacent two baffle(s) spacings.
When overweight machine was worked, gas entered overweight machine shell from the gas inlet, and the through hole 3-1-3 on rotary drum housing 3-1-1 enters the rotary drum inner chamber, and the pneumatic outlet that is provided with from overweight machine shell behind the central through hole on the housing 3-1-1 is discharged again; Liquid is directly delivered to the inner chamber of rotary drum 3-1 from the liquid inlet, rotation along with rotary drum 3-1, the liquid of sending into is thrown away laterally, and the through hole 3-1-3 from housing 3-1-1 periphery throws away the inner chamber of overweight machine shell the liquid exit discharge of final setting from overweight machine shell.Since liquid in rotary drum outside rotary drum, gas is outside rotary drum the process in the rotary drum, the pressure that all is subjected to traverse baffle 3-1-1 stops, make liquid form the very thin liquid-flow film of one deck thus on traverse baffle 3-1-1 surface, therefore greatly increased the contact area of liquid and gas, strengthened the mass-transfer efficiency between the gas-liquid, guarantee the clearance and the specific absorption that contains ammonia in the ammonia gas of ammonia in the sewage, guaranteed the decontamination effect improving of ammonia-nitrogen sewage.
The present invention adopts custom-designed overweight machine to replace stripping tower of the prior art and absorption tower, under the prerequisite that guarantees the ammonia-nitrogen sewage decontamination effect improving, not only reduced the shared space of equipment greatly, reduced the cost of investment of facility, and operation of equipment is easier, safeguards convenient.
Claims (4)
1, a kind of hypergravity purifying method of ammonia-nitrogen sewage, be specially: the pH value of ammonia-containing water is adjusted to 10-11, by pump waste water is delivered in the rotary drum inner chamber in the overweight machine of stripping, utilize gas blower that air is sent in the rotary drum inner chamber in the overweight machine of stripping simultaneously, waste water is under the rotary drum action of centrifugal force, contact with the air of sending into is reverse, and mass transfer takes place remove ammonia, remove the waste water behind the ammonia then and contain ammonia gas and from rotary drum, discharge respectively; Be admitted to in the overweight machine of the absorption of spline structure from the ammonia gas that contains of the overweight machine output of stripping, in absorbing overweight machine, send into absorption liquid by pump simultaneously, in the rotary drum in absorbing overweight machine, absorption liquid is under the rotary drum action of centrifugal force, with containing of sending into, ammonia gas is reverse to be contacted, the promoting the circulation of qi liquid mass transfer of going forward side by side is removed ammonia, and absorption liquid enters and absorbs the liquid bath from absorbing overweight machine then, recirculation is used after removing wherein ammonia react resultant by any means known, and the gas that removes behind the ammonia then is discharged in the atmosphere.
2, purifying method according to claim 1 is characterized in that, described absorption liquid is a sulphuric acid soln.
3, used a kind of overweight machine in claim 1 or the 2 described purifying methods, it is characterized in that, this overweight machine comprises airtight shell, this shell upper is provided with the gas inlet, the bottom is provided with liquid outlet, be provided with cylindric rotary drum in it, the axial end of rotary drum is fixed on the back shaft, be densely covered with through hole on the rotary drum periphery, be disposed radially baffle groups in the rotary drum, the ring-type traverse baffle that this baffle groups is provided with one heart and alternately is fixed on one by one on the axial two side of rotary drum by several constitutes, the axial length of traverse baffle is less than the axial length of rotary drum inner chamber, the other end sidewall relative with described back shaft on the rotary drum is provided with a central through hole, at this central through hole place, rotatable airtight joining between rotary drum sidewall and the side wall of outer shell, shell is provided with the pneumatic outlet that is connected with central through hole on the rotary drum, and liquid inlet place fixed liquid input tube extend in the rotary drum inner chamber by the central through hole on the rotary drum is unsettled on the shell.
4, overweight machine according to claim 3 is characterized in that, also is provided with the baffling ring of radial width less than adjacent two baffle(s) spacings on described each traverse baffle surface, the common formation of this baffling ring and its place traverse baffle one T type baffling section.
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| CNB2008101009101A CN100566788C (en) | 2008-02-26 | 2008-02-26 | The hypergravity of ammonia-nitrogen sewage purifies used overweight machine |
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| CNB2008101009101A CN100566788C (en) | 2008-02-26 | 2008-02-26 | The hypergravity of ammonia-nitrogen sewage purifies used overweight machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362608B (en) * | 2008-08-15 | 2010-06-02 | 赖祖明 | Apparatus for separating ammonia nitrogen in waste water |
| CN102259949A (en) * | 2011-07-22 | 2011-11-30 | 紫金矿业集团股份有限公司 | Method for treating high concentration of cyanide-containing wastewater by supergravity technology |
| CN103146416A (en) * | 2011-12-06 | 2013-06-12 | 中国石油天然气股份有限公司 | Method of separating disulfide from lye |
| CN104710052A (en) * | 2015-03-03 | 2015-06-17 | 中北大学 | Method and device for treating high-concentration nitrobenzene-containing waste water by using air-stripping-microelectrolysis-fenton oxidation method |
| CN106698747A (en) * | 2016-12-22 | 2017-05-24 | 重庆淼森环保工程有限公司 | Method for treating ammonia nitrogen in wastewater |
| CN114105400A (en) * | 2021-07-15 | 2022-03-01 | 北京科技大学 | Integrated device for separating black water from treatment source |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105347464B (en) * | 2015-11-26 | 2016-08-17 | 浙江省环境监测中心 | A kind of integrated reactor based on electrode-hypergravity biological rotating disk and processing method thereof |
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2008
- 2008-02-26 CN CNB2008101009101A patent/CN100566788C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362608B (en) * | 2008-08-15 | 2010-06-02 | 赖祖明 | Apparatus for separating ammonia nitrogen in waste water |
| CN102259949A (en) * | 2011-07-22 | 2011-11-30 | 紫金矿业集团股份有限公司 | Method for treating high concentration of cyanide-containing wastewater by supergravity technology |
| CN103146416A (en) * | 2011-12-06 | 2013-06-12 | 中国石油天然气股份有限公司 | Method of separating disulfide from lye |
| CN103146416B (en) * | 2011-12-06 | 2015-05-13 | 中国石油天然气股份有限公司 | Method of separating disulfide from lye |
| CN104710052A (en) * | 2015-03-03 | 2015-06-17 | 中北大学 | Method and device for treating high-concentration nitrobenzene-containing waste water by using air-stripping-microelectrolysis-fenton oxidation method |
| CN106698747A (en) * | 2016-12-22 | 2017-05-24 | 重庆淼森环保工程有限公司 | Method for treating ammonia nitrogen in wastewater |
| CN106698747B (en) * | 2016-12-22 | 2019-04-26 | 重庆淼森环保工程有限公司 | A kind of ammonia nitrogen processing method in waste water |
| CN114105400A (en) * | 2021-07-15 | 2022-03-01 | 北京科技大学 | Integrated device for separating black water from treatment source |
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