CN201250119Y - High-efficiency ammonia-nitrogen wastewater-stripping tower - Google Patents
High-efficiency ammonia-nitrogen wastewater-stripping tower Download PDFInfo
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- CN201250119Y CN201250119Y CNU2008200453355U CN200820045335U CN201250119Y CN 201250119 Y CN201250119 Y CN 201250119Y CN U2008200453355 U CNU2008200453355 U CN U2008200453355U CN 200820045335 U CN200820045335 U CN 200820045335U CN 201250119 Y CN201250119 Y CN 201250119Y
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Abstract
The utility model relates to a stripping tower capable of efficiently disposing ammonia-nitrogen wastewater, which comprises a tower body, a water inlet, a water outlet, a gas inlet, a gas outlet, a condenser, tower body filling, tower body supports, a heat exchanger and a lift pump; wherein, the water inlet, the water outlet, the gas inlet, the gas outlet, the condenser, the tower body filling and the tower body supports are fixed on the tower body; the heat exchanger and the lift pump are arranged outside the tower body; one end of the water inlet of the tower body is connected with the heat exchanger through the lift pump; and the other end of the water inlet is connected with a liquid-spraying unit. The condenser, a foam destroyer, the liquid-spraying unit, an upper filling bed, a liquid redistributor, a foam destroyer, a middle filling bed, a foam destroyer, a lower filling bed and an air distributor are arranged orderly from the top down on the tower body, and the gas inlet is connected with the air distributor. The utility model has the following advantages: the stripping efficiency is high; the national wastewater discharge standard can be met after one-time disposal; the disposal cost is low; the operation is reliable; the content of the vapor in the stripped gas is low; the concentration of the ammonium salt in the absorption liquid contained in a subsequent ammonia absorption device is greatly increased; and meanwhile, the stripping tower also can be applied in the industrialized disposal of other high-concentration ammonia-nitrogen wastewaters.
Description
Affiliated technical field
The utility model relates to a kind of stripping device that can efficiently remove ammonia nitrogen in the ammonia nitrogen waste water.
Background technology
China is Rare Earth Production big country, has supplied world's overwhelming majority rare-earth products, but discharge the waste water that contains all contaminations in a large number in Rare Earth Production and purge process, and pollutent mainly comprises: heavy metal, acid, ammonia nitrogen, oils, extraction agent and COD
CrDeng, cause serious water pollution for the Rare Earth Production area.Heavy metal in the waste water, acid, oils and extraction agent etc. can obtain removal effect preferably through physics or chemical process processing, reach wastewater discharge standard, but the processing of ammonia nitrogen is the key of the complete qualified discharge of such waste water of restriction always, more at the technology of ammonia nitrogen processing at present, as breakpoint chlorination, chemical precipitation, reverse osmosis (or electrodialysis), ammonia stripping and ion-exchange etc., but processing to the ammonia nitrogen waste water of high density, shortcomings such as all there is the processing costs height in other technologies except that the ammonia stripping, and effect is not satisfactory.
In the existing ammonia stripping technology, as if carrying out stripping under the situation that does not improve water temperature in room temperature, the ammonia nitrogen removal effect is relatively poor, and the variation effect with temperature is also unstable, carry out stripping and improve water temperature, as China Patent No. 200720006185 " ammonia-nitrogen desorption device ", by improving water temperature at 70 ℃ of following strippings, the water outlet ammonia nitrogen concentration can reach the primary standard among the national composite wastewater emission standard GB8978-1996 " integrated wastewater discharge standard ", but reach more than 50% by waste water steam output behind the lab scale discovery stripping, this has increased the absorption difficulty for follow-up ammonia absorption unit, and reduces ammonium salt concentration in the absorption liquid greatly, is unfavorable for subsequent disposal.
At present Ammonia blowing-out tower generally adopts two sections filling batch, is that 01274455 " garbage filter liquefied ammonia stripping device " and the patent No. are 03282512 " domestic waste sanitary landfill percolate removal of ammonia and nitrogen device " as China Patent No.; By the secondary liquid distributor, make liquid distribution more even, blower fan blasts air in a large number at the bottom of tower, there is higher blast in the tower, because waste water can produce a large amount of foams in treating processes, influence the normal operation of spray equipment, even it is also undesirable to install the scum dredger effect additional, also there is elevated pressures in air at gaseous phase outlet simultaneously, and air stripping efficient is lower.
Summary of the invention
The purpose of this utility model provides a kind of ammonia stripping device that can keep stablizing the stripping temperature under different temperature conditions, solution blows out the high problem of vapour content in the gas phase, eliminate the influence of foam to the stripping process, improve air stripping efficient, reduce running cost, and make high-concentration ammonia nitrogenous wastewater promptly reach emission standard through a stripping processing.
The efficient stripping tower of ammonia nitrogen waste water of the present utility model comprises tower body and water inlet pipe, rising pipe, inlet mouth, air outlet, condenser, tower body filler and the tower body support etc. that are fixedly mounted on the tower body, and heat exchanger outside the external tower body and lift pump, tower body water inlet pipe one end links to each other with heat exchanger by lift pump, and the other end links to each other with liquid spraying device.Tower body is furnished with condenser, upper strata filler scum dredger, liquid spraying device, upper strata bed of packings, middle filler scum dredger, liquid re-distributor, middle filler bed, lower floor's filler scum dredger, lower floor's bed of packings and air-distributor from top to bottom successively, and air inlet links to each other with air-distributor.
Tower body diameter described in the efficient stripping tower of ammonia nitrogen waste water of the present utility model and tower height can decide according to the wastewater treatment capacity size, and the tower body material can carbon steel, stainless steel, glass reinforced plastic, clad steel plate or carbon steel line with rubber.
The height inequality of described three layers of bed of packings, each layer bed of packings bottom have bracing or strutting arrangement to support, and top has hold-down gear to compress, and the upper strata bed of packings is a pretreatment layer, and it highly is 0.4～0.6 times of middle filler bed; The middle filler bed is main processing layer; Lower floor's bed of packings is the intensive treatment layer, it highly is 0.6～0.8 times of middle filler bed, three layers of used filler of bed of packings are structured packing, can be a kind of in wire packing, ripple packing, corrugated plate packing, conjugate ring, Pall ring, cascade ring, the plasticity garland, material can be carbon steel, pottery, stainless steel or plastics.
In wastewater treatment especially in the treating processes of RE waste water, because a small amount of extraction agent and the alkali reaction that contain in the waste water generate a kind of tensio-active agent, violent turbulence along with air, produce a large amount of foams, make the water distribution inequality, reaction product can't in time blow out with air, by installing a scum dredger influences the upper strata bed of packings with the foam of avoiding lower floor's bed of packings to produce operation additional every layer of filler upper end, scum dredger adopts the filler laminar, filler is wire cloth or nylon mesh filler, more even for what liquid can be distributed, one liquid re-distributor is set between upper strata filler and middle filler, this device atmospheric drag is little, and water distribution is even, does not stay the dead angle can for lower floor's filler.
The utility model is arranged a heat exchanger in the tower body outside, to improve the waste water blowoff temperature, improves ammonia nitrogen removal frank, and can obtain and identical at ordinary times removal effect lower season at temperature.Because waste water water temperature when stripping is higher, blast air in a large number and make the waste water rapid evaporation, contain a large amount of water vapors in the gas that blows out and influence follow-up ammonia absorption unit operation, reduce the ammonia absorption strength, the utility model is installed a condenser in the gaseous phase outlet lower end, makes in the water vapor condensation reflux tower.
The utility model water inlet pipe adopts an end to link to each other with lift pump, the other end links to each other with spray equipment, waste water is promoted to cat head after the spray equipment water distribution uniformity through lift pump, air blasts from inlet mouth by blower fan and evenly is blown in the tower through the gas phase sparger, the stripping product is discharged from the air outlet with air-flow, enter follow-up ammonia absorption unit at last, waste water after stripping is handled, water outlet is discharged at the bottom of the tower, designed a porous leakage board at the bottom of tower, this leakage board can be blocked preferably because of the filler resistance causes the phenomenon of gas phase " backflow " and take place.
The utility model is mainly used in the processing of rare earth ammonia nitrogen waste water, and the high-concentration ammonia nitrogenous wastewater that also can be used for other industrial discharge is in addition handled.
The utility model principle of work is: the ammonia nitrogen waste water that regulates the pH value enters heat exchanger, through suitably heating after lift pump rises to cat head, evenly fall into the inner-tower filling material layer by spray equipment, through liquid re-distributor and scum dredger, at three layers of bed of packings repeatedly behind gas-liquid mass transfer and the aerated reaction, water outlet is discharged at the bottom of the tower at last; Air blasts through the gas phase sparger from inlet mouth by blower fan and evenly is blown into packing layer, air upwards blows and causes the violent turbulence of gas-liquid in the process, producing a large amount of foams upwards flows with air-flow, meeting scum dredger eliminates and becomes the drop backfill bed of material that falls behind the foam, last stripping air-flow water vapor condensation by condenser time of heat becomes water droplet to fall back once more in the tower, and comparatively the exsiccant air-flow enters follow-up ammonia absorption unit.The operation of said process and reaction make NH mainly based on the gas-liquid mass transfer principle by adjust pH
4 +Be converted into free state NH
3, a large amount of then aerations impel NH in the water
3Desorb is shifted in atmosphere, to reach the purpose of removing ammonia nitrogen.
The utility model is by regulating wastewater pH to 11.5-12, regulate wastewater temperature to 50-60 ℃ through heat exchanger again, handling through stripping tower once can be that the ammonia nitrogen waste water of 4000-5000mg/L is reduced to below the 10mg/L with concentration, reaches national waste water and allows emission standard.Advantage of the present utility model is: can be according to influent ammonium concentration flexible stripping temperature, concentration is got over high-temperature and can correspondingly be improved, gas-water ratio is lower, in temperature is under 50-60 ℃ of conditions during stripping, gas-water ratio can reach the water outlet ammonia nitrogen concentration less than 10mg/L less than 3200, the gas-water ratio of 4000-5000 when more domestic existing ammonia stripping device generally moves significantly reduces, and the more existing stripping device of heating of stripping temperature reduces by 10-20 ℃, save process cost greatly, reduced cost for wastewater treatment; Water vapor refluxes through condenser condenses in the gas phase that blows out simultaneously, improved ammonia absorption liquid concentration in the follow-up ammonia absorption unit greatly, reduced the subsequent disposal expense, the utility model is owing to adopt structured packing to make water distribution more even, efficient is higher, and by three layers of bed of packings and every layer of bed of packings upper end installation one scum dredger are set, this has not only eliminated the influence of foam to stripping, simultaneously farthest utilize aerodynamic force, made the air utilising efficiency significantly improve.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
1-gaseous phase outlet (connecing the ammonia absorption unit), 2-condenser, 3-upper strata filler scum dredger, 4-liquid spraying device, 5-filler hold-down gear, 6-upper strata bed of packings, 7-filler bracing or strutting arrangement, 8-liquid re-distributor, 9-middle filler scum dredger, 10-middle filler bed, 11-lower floor filler scum dredger, 12-lower floor bed of packings, 13-inlet mouth, 14-leakage board, 15-tower body support, 16-water outlet, 17-tower body, 18-water-in, 19-gas phase sparger, 20-lift pump, 21-heat exchanger.
Embodiment
Below will be by the detailed description of the efficient stripping tower embodiment of the utility model ammonia nitrogen waste water be further set forth the utility model, but practical example is not the restriction to utility model.
As shown in Figure 1, the utility model ammonia nitrogen waste water stripping tower, comprise tower body 17 and water-in 18, water outlet 16, inlet mouth 13, air outlet 1, condenser 2, tower body filler (6,10,12) and the tower body support 15 etc. that are fixedly mounted on the tower body 17, and heat exchanger outside the external tower body 21 and lift pump 20, tower body water-in 18 1 ends link to each other with heat exchanger 21 by lift pump 20, and the other end links to each other with liquid spraying device 4.Tower body is furnished with condenser 2, upper strata filler scum dredger 3, liquid spraying device 4, upper strata bed of packings 6, liquid re-distributor 8, middle filler scum dredger 9, middle filler bed 10, lower floor's filler scum dredger 11, lower floor's bed of packings 12 and air-distributor 19 from top to bottom successively, each layer bed of packings upper end is fixed by hold-down gear 5 compactings, the lower end is supported by bracing or strutting arrangement 7 load-bearing, air inlet 13 links to each other with air-distributor 19, and leakage board 14 is added a cover with blocking-up gas phase " backflow " in rising pipe 16 upper ends.Described liquid spraying device 4 is the tubular type liquid distributor, it is stainless steel or graphite that described heat exchanger 21 adopts the tubular heater exchhanger material of the XD2 model of the East Sea, Wenzhou City food machinery manufactory manufacturing, described condenser 2 is a coiled tube condenser, described scum dredger (3,9,11) is a wire mesh demister, and described each layer filling batch filler is a screen waviness packings.
Above-mentioned ammonia nitrogen waste water stripping tower is applied to a Rare Earth Separation factory high-concentration ammonia nitrogenous wastewater (4200mg/L) handles, tower diameter 3200mm, tower height 16m, wastewater treatment capacity is 730m
3/ d, regulating wastewater pH is 12, is warming up to 50 ℃ through heat exchanger, and the control vapour-liquid ratio is 3200, and through the minimum 6.5mg/L that reaches of stripping water outlet ammonia nitrogen concentration, clearance is near 100%.
Claims (4)
1, the efficient stripping tower of a kind of ammonia nitrogen waste water, comprise tower body [17] and be fixedly mounted on water-in [18] on the tower body [17], water outlet [16], inlet mouth [13], air outlet [1], condenser [2], tower body filler ([6], [10], and tower body support [15] etc. [12]), and heat exchanger outside the external tower body [21] and lift pump [20], it is characterized in that: tower body water-in [18] one ends link to each other with heat exchanger [21] by lift pump [20], the other end links to each other with liquid spraying device [4], tower body is furnished with condenser [2] from top to bottom successively, upper strata filler scum dredger [3], liquid spraying device [4], upper strata bed of packings [6], liquid re-distributor [8], middle filler scum dredger [9], middle filler bed [10], lower floor's filler scum dredger [11], lower floor's bed of packings [12] and air-distributor [19], each layer bed of packings upper end is fixed by hold-down gear [5] compacting, the lower end is supported by bracing or strutting arrangement [7] load-bearing, air inlet [13] links to each other with air-distributor [19], and leakage board [14] is added a cover with blocking-up gas phase " backflow " in water outlet [16] upper end.
2, the efficient stripping tower of ammonia nitrogen waste water as claimed in claim 1 is characterized in that: the heat exchanger [21] that install in the described Ammonia blowing-out tower outside is a tubular heater exchhanger, and described condenser [2] is a coiled tube condenser.
3, the efficient stripping tower of ammonia nitrogen waste water as claimed in claim 1 is characterized in that: the height inequality of described three layers of bed of packings, upper strata bed of packings height are 0.4～0.6 times of middle filler bed; Lower floor's bed of packings height is 0.6～0.8 times of middle filler bed, and three layers of used filler of bed of packings are structured packing, can be a kind of in wire packing, ripple packing, corrugated plate packing, conjugate ring, Pall ring, cascade ring, the plasticity garland.
4, the efficient stripping tower of ammonia nitrogen waste water as claimed in claim 1 is characterized in that: described every layer of packing layer upper end all installs a scum dredger additional, and scum dredger adopts the filler laminar, and filler is wire cloth or nylon mesh filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200453355U CN201250119Y (en) | 2008-03-25 | 2008-03-25 | High-efficiency ammonia-nitrogen wastewater-stripping tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200453355U CN201250119Y (en) | 2008-03-25 | 2008-03-25 | High-efficiency ammonia-nitrogen wastewater-stripping tower |
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|---|---|
| CN201250119Y true CN201250119Y (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200453355U Expired - Fee Related CN201250119Y (en) | 2008-03-25 | 2008-03-25 | High-efficiency ammonia-nitrogen wastewater-stripping tower |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241432A (en) * | 2010-05-11 | 2011-11-16 | 安徽南风环境工程技术有限公司 | Special equipment and method for treating ammonia nitrogen wastewater |
| CN102350071A (en) * | 2011-09-05 | 2012-02-15 | 武汉科技大学 | Compound tower for processing high-density ammonia nitrogen wastewater with airflow desorption method |
| CN102583613A (en) * | 2012-02-22 | 2012-07-18 | 宜兴市金德环保设备有限公司 | Stripping tower |
| CN104692516A (en) * | 2015-03-19 | 2015-06-10 | 吉林大学 | Device and method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater |
| CN104743701A (en) * | 2015-03-23 | 2015-07-01 | 华南理工大学 | Combined type composite filler adsorption tank for wastewater treatment process |
| CN104944666A (en) * | 2015-06-24 | 2015-09-30 | 安徽显闰环境工程有限公司 | High-concentration ammonia-nitrogen wastewater treatment combination device for industrial waste water treatment |
| CN107364915A (en) * | 2016-05-13 | 2017-11-21 | 江苏瑞盛水处理有限公司 | A kind of new Ammonia blowing-out tower |
| CN107445290A (en) * | 2017-09-11 | 2017-12-08 | 安庆师范大学 | A kind of wastewater treatment equipment of wind drive |
| CN108408815A (en) * | 2018-02-02 | 2018-08-17 | 张国梁 | A kind of ammonia-nitrogen stripping tower |
-
2008
- 2008-03-25 CN CNU2008200453355U patent/CN201250119Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241432A (en) * | 2010-05-11 | 2011-11-16 | 安徽南风环境工程技术有限公司 | Special equipment and method for treating ammonia nitrogen wastewater |
| CN102350071A (en) * | 2011-09-05 | 2012-02-15 | 武汉科技大学 | Compound tower for processing high-density ammonia nitrogen wastewater with airflow desorption method |
| CN102583613A (en) * | 2012-02-22 | 2012-07-18 | 宜兴市金德环保设备有限公司 | Stripping tower |
| CN104692516A (en) * | 2015-03-19 | 2015-06-10 | 吉林大学 | Device and method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater |
| CN104743701A (en) * | 2015-03-23 | 2015-07-01 | 华南理工大学 | Combined type composite filler adsorption tank for wastewater treatment process |
| CN104944666A (en) * | 2015-06-24 | 2015-09-30 | 安徽显闰环境工程有限公司 | High-concentration ammonia-nitrogen wastewater treatment combination device for industrial waste water treatment |
| CN107364915A (en) * | 2016-05-13 | 2017-11-21 | 江苏瑞盛水处理有限公司 | A kind of new Ammonia blowing-out tower |
| CN107445290A (en) * | 2017-09-11 | 2017-12-08 | 安庆师范大学 | A kind of wastewater treatment equipment of wind drive |
| CN108408815A (en) * | 2018-02-02 | 2018-08-17 | 张国梁 | A kind of ammonia-nitrogen stripping tower |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20100325 |