CN100566788C - The hypergravity of ammonia-nitrogen sewage purifies used overweight machine - Google Patents
The hypergravity of ammonia-nitrogen sewage purifies used overweight machine Download PDFInfo
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- CN100566788C CN100566788C CNB2008101009101A CN200810100910A CN100566788C CN 100566788 C CN100566788 C CN 100566788C CN B2008101009101 A CNB2008101009101 A CN B2008101009101A CN 200810100910 A CN200810100910 A CN 200810100910A CN 100566788 C CN100566788 C CN 100566788C
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Abstract
The invention discloses a kind of hypergravity purification method of ammonia-nitrogen sewage, this method is at first utilized the overweight machine of stripping that sewage is carried out stripping and is handled, and then utilizes the overweight machine of absorption that the ammonia gas that contains of the overweight machine output of stripping is removed ammonia treatment.The invention also discloses a kind of overweight machine, this overweight machine comprises airtight shell, shell upper is provided with the gas access, the bottom is provided with liquid outlet, be provided with cylindric rotary drum in it, be densely covered with through hole on the rotary drum periphery, be provided with baffle groups in the rotary drum, the rotary drum center be provided with shell on gas vent and the through hole that is connected of liquid inlet.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 operating cost on the one hand, and the sulphur ammonium of Hui Shouing also can be made chemical fertilizer and use on the other hand.
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 concentrations 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, that the planktonic algae on the sea relies on that marine bottom upwards flows is nitrogenous, the current of phosphorus and surviving.If but nutriment 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 bio-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 carcinogen, 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 hemoglobin of human body be oxidized to ferrihemoglobin, loses the hemoglobin ability of delivery of oxygen in vivo, the symptom of anoxic 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 major pollutants 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 pollutant, 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-load 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 steam 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, gas 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 alkali condition, be the ammonia secondary pollution air of avoiding stripping to come out, mist 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 purification method of ammonia-nitrogen sewage, and the present invention also provides employed a kind of overweight machine in the said method further.
For achieving the above object, purification 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 air blast 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 the quality transmission 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 quality of going forward side by side transmission removes ammonia, and absorption liquid enters and absorbs the liquid bath from absorbing overweight machine then, recirculation is used after removing wherein ammonia react product by any means known, and the gas that removes behind the ammonia then is discharged in the atmosphere.
Further, described absorption liquid is a sulfuric acid solution.
Employed a kind of overweight machine in the said method, this overweight machine comprises airtight shell, this shell upper is provided with the gas access, 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 deflection plate 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 deflection plate is less than the axial length of rotary drum inner chamber, 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 gas vent that is connected with central through hole on the rotary drum, and the fixing liquid input tube in liquid inlet place 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 deflection plate surface, the common formation of this baffling ring and its place deflection plate 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 operating 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 disposal of refuse percolate of baffling, is about 11 in the pH value, and rotating speed is 800r/min-1000r/min, gas 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 purification 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 schematic diagram in the overweight machine of the present invention;
Fig. 5 is an A-A profile among Fig. 4.
1 blower fan among the figure, 2 flowmeters, the overweight machine of 3 strippings, 3-1 rotary drum, 4 bearing blocks, 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.
The specific 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 purified treatment, at first in wastewater trough 10, sewage pH value is adjusted to 10-11, and by water pump 9 and flowmeter 2 sewage is quantitatively sent among the rotary drum 3-1 in the overweight machine 3 of stripping, utilize Roots blower 1 and flowmeter 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 outlet of sewer 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 air intake input, thereby form reverse 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 treatment 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 working method 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 reverse 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 sulfuric acid solution 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 access, 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 spring 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 deflection plate 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 deflection plate 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 spring 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 gas vent 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 deflection plate 3-1-2 surface, the common formation of this baffling ring and its place deflection plate 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 access, and the through hole 3-1-3 on rotary drum housing 3-1-1 enters the rotary drum inner chamber, and the gas vent 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 outlet 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 deflection plate 3-1-1 stops, make liquid form the very thin liquid flow film of one deck thus on deflection plate 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 absorptivity that contains ammonia in the ammonia gas of ammonia in the sewage, guaranteed the clean-up effect 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 clean-up effect, not only reduced the shared space of equipment greatly, reduced the cost of investment of facility, and the equipment operation is easier, safeguards convenient.
Claims (1)
1, the overweight machine that uses during a kind of hypergravity at ammonia-nitrogen sewage purifies, comprise: airtight shell, this shell upper is provided with the gas access, 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 deflection plate 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 deflection plate is less than the axial length of rotary drum inner chamber, 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 gas vent that is connected with central through hole on the rotary drum, and the fixing liquid input tube in liquid inlet place extend in the rotary drum inner chamber by the central through hole on the rotary drum is unsettled on the shell; It is characterized in that, also be provided with the baffling ring of radial width on described each deflection plate surface, the common formation of this baffling ring and its place deflection plate one T type baffling section less than adjacent two baffle(s) spacings.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105347464A (en) * | 2015-11-26 | 2016-02-24 | 浙江省环境监测中心 | Integrated reactor based on electrode-supergravity biological rotating discs and treatment method therefor |
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| 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 |
| CN103146416B (en) * | 2011-12-06 | 2015-05-13 | 中国石油天然气股份有限公司 | Method for separating disulfide from alkali liquor |
| CN104710052B (en) * | 2015-03-03 | 2017-04-12 | 中北大学 | Method and device for treating high-concentration nitrobenzene-containing waste water by using air-stripping-microelectrolysis-fenton oxidation method |
| 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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