CN103449551B - Multi-level ammonia-nitrogen wastewater removal process and equipment - Google Patents
Multi-level ammonia-nitrogen wastewater removal process and equipment Download PDFInfo
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- CN103449551B CN103449551B CN201310428603.7A CN201310428603A CN103449551B CN 103449551 B CN103449551 B CN 103449551B CN 201310428603 A CN201310428603 A CN 201310428603A CN 103449551 B CN103449551 B CN 103449551B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a multi-level ammonia-nitrogen wastewater removal process and equipment. The removal equipment mainly comprises an air stripping tower, an air storage tank, an air heater, a fan, a waste liquid pump, an acid liquid pump, an acid liquid storage tank and a buffer tank and is characterized in that only one air stripping tower is provided; the air stripping tower internally comprises absorption sections and air stripping sections of the designed number; a layer of breaking tray is mounted between each absorption section and each air stripping section; for a plate tower of which the tower internals mainly include tower plates, each absorption section comprises trays of the designed number, and each air stripping section comprises trays of the designed number; for a packed tower of which the tower internals mainly include packing, each absorption section internally comprises a set of distributor and a section of packing, and each air stripping section internally comprises a set of distributor and a section of packing. The removal process adopts the multi-level ammonia-nitrogen wastewater removal equipment disclosed by the invention, and comprises an air circulation process, a waste liquid treatment process and an acid liquid circulation process.
Description
Technical field
The present invention relates to chemical wastewater treatment technology, be specially a kind of multistage ammonia nitrogen waste water removing process and equipment.This Processes and apparatus can be widely used in the ammonia nitrogen waste water process of the industries such as petrochemical industry, coking, chemical fertilizer and pharmacy.
Background technology
Ammonia nitrogen waste water source is a lot, and as the every days such as petroleum chemical plant, fertilizer plant, coke-oven plant, pharmaceutical factory, food factory and refuse landfill all can produce a large amount of high-concentration ammonia nitrogenous wastewater, and quantity discharged is very large.Particularly many factories are irresponsiblely direct enters water body by a large amount of ammonia nitrogen waste water, not only can cause body eutrophication, and can strengthen intractability and the processing cost of polluted-water.Ammonia nitrogen removal in the current sewage of China is unsatisfactory, and part of contaminated water treatment plant is by increasing the method process such as aeration rate, and result is unsatisfactory.Now have multiple about the treatment process of ammonia nitrogen waste water in the factory, as biochemical processing, air stripping method, break point chlorination, steam stripped method, chemical precipitation method and electrochemical process etc., but the processing costs of these methods is higher, not overripened in technique.The ammonia nitrogen waste water of current process big yield applies maximum still air stripping methods.
Chinese patent (publication number: CN 102241422 A) discloses a kind of method processing ammonia nitrogen waste water, it comprises effluent cycle pond, effluent cycle pond is connected with stripping liquid feeding pump by waste pipe, the waste liquid adding deamidization is squeezed into stripping tower by stripping liquid feeding pump, in stripping tower, top is provided with waste water spray equipment, waste water contacts by packing layer and air are reverse by after spray equipment, air out enters ammonia absorber through airline afterwards from top, absorption tower, utilize through deamination process Posterior circle, waste water out enters the circulation of effluent cycle pond afterwards and enters Ammonia blowing-out tower and remove, discharge after finally reaching emission standard.But first this stripping method repeatedly squeezes into absorption tower, so it is lower to cause stripping process production efficiency because needs repeatedly will to be circulated by pump containing ammonia waste liquid; Secondly, because whole treating processes will be carried out in two towers, pipeline is many, complex process, and running resistance loss is large, and power consumption is high, discontented sufficient energy-saving and emission-reduction, the modern crafts requirement of protection of the environment.
Chinese patent (publication number CN 102311150 A) also discloses the method for another kind of removal of ammonia and nitrogen waste water.Mainly in an ammonia still, double diffusion raw material ammonia water is divided in this technique, separated by one piece of disconnected tower tray in the middle of whole ammonia still, break tower tray top and bottom tower wall of ammonia still is provided with ammonia still process water communicating pipe, first raw material ammonia water enters ammonia still from ammonia still tower tray top of breaking, by steam, first time ammonia still process process is carried out to raw material ammonia water, ammoniacal liquor after process draws ammonia still, enter a reaction tower or tempering tank, raw material ammonia water and NaOH solution are reacted, the ammonia vapour generated after the ammonia and the ammonia distillation that generate is broken below tower tray by ammonia still and imports in the ammonia still above the tower tray that breaks by airway, discharge from tower top, the column plate that reacted ammoniacal liquor then imports below disconnected tower tray continues distillation, distilled ammonia wastewater is discharged bottom ammonia still.In this waste water treatment process, adopt the technique of steam deamination, and in this reduction distilled ammonia wastewater CN-content technique in, raw material ammonia water is needed to draw ammonia still, and send into reaction tower or tempering tank and NaOH solution and react, then reacted ammoniacal liquor is introduced the break column plate of tower tray bottom of ammonia still by branch road and continue distillation, operating procedure is complicated, long flow path; The ammonia still process method that this technique adopts, steam single use, without circulation, consumption is large, and energy consumption is high, also discontented sufficient energy-saving and emission-reduction, the modern crafts requirement of protection of the environment.
Summary of the invention
For the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is, a kind of multistage ammonia nitrogen waste water removing process and equipment are provided, this technology and equipment adopts a stripping tower, can complete the ammonia nitrogen removal in ammonia nitrogen waste water in this tower, without the need to drawing stripping tower containing ammonia waste liquid, technique will be simple, flow process shortens, and ammonia removal efficiency is high; The hot air circulate of steam deamination technique uses, and stripping energy consumption is low, and non-secondary pollution is conducive to energy-conserving and environment-protective, is suitable for industrial applications.
The technical scheme that the present invention solves described equipment and technology problem is, designs a kind of multistage ammonia nitrogen waste water and removes equipment, mainly comprise: stripping tower, air accumulator, airheater, blower fan, waste drains pump, acid pump, acid solution storage tank and dashpot; It is characterized in that one end of described air accumulator, one end of airheater and blower fan is connected in series successively with one group of pipeline, the other end of air accumulator is connected with the air vout of stripping tower, and the other end of blower fan is connected with the gas inlet of stripping tower; Waste drains pump one group of pipeline is connected with the waste liquid entrance of stripping tower; Dashpot and first acid pump, one group of pipeline are connected in series, and first acid pump is connected with the acid solution entrance of stripping tower, second acid pump and acid solution storage tank one group of pipeline are connected in series, acid solution storage tank exports with the acid solution of stripping tower and is connected, and second acid pump is also connected with the acid solution entrance of stripping tower; Comprise absorber portion and stripping section that design quantity requires in described stripping tower, one deck is installed between each absorber portion and each stripping section and breaks tower tray; For the tray column of column internals composition primarily of column plate composition, each absorber portion comprises the tower tray of design quantity, and each stripping section comprises the tower tray of design quantity; For the packing tower of column internals composition primarily of filler composition, comprise a set of sparger and one section of filler composition in each absorber portion, in each stripping section, comprise a set of sparger and one section of filler.
The technical scheme that the present invention solves described Technology problem is, design a kind of multistage ammonia nitrogen waste water removing process, this technique adopts ammonia nitrogen waste water of the present invention to remove equipment, and comprise air cycle technique, process for treating waste liquor and acid cycle technique, described air cycle technique is: first the air come from stripping tower top air outlet enters air accumulator, then airheater is entered, air after heating enters first stripping section bottom stripping tower by gas inlet after blower fan, the first absorber portion above it is entered by first disconnected tower tray through air after this stripping section, air enters second stripping section by second disconnected tower tray again afterwards, second absorber portion is entered by the 3rd disconnected tower tray through air after this stripping section, and then by the 3rd stripping section, 4th disconnected tower tray, 3rd absorber portion, by that analogy, until air is by last absorber portion, and 2 absorber portions are adjacent, the quantity of described stripping section, disconnected tower tray and absorber portion can carry out designing or adjusting according to actual condition, air enters airline by being exported by overhead air after all stripping sections, disconnected tower tray and absorber portion, finally again enter air accumulator, so complete primary air recycle, described process for treating waste liquor is: containing ammonia waste liquid by waste drains pump from waste liquid entrance enter topmost stripping section top with enter tower air inversion and contact, carry out mass-transfer progress, waste liquid after process again enters the stripping section below next-door neighbour after the bottom waste stream outlet discharge of this stripping section, again with enter tower air inversion and contact, carry out mass-transfer progress, the from then on stripping section bottom waste stream outlet of the waste liquid after process is discharged, described acid cycle technique is: the top being entered absorber portion topmost in stripping tower from dashpot acid solution out by first acid pump by acid solution entrance, contact with air inversion, ammonia is allowed to transfer to from air in acid solution, make to be purified containing ammonia air, reacted acid solution exports out from the bottom acid solution of this absorber portion after assembling on disconnected tower tray, divide two portions technique trend: technique one is: a part of acid solution enters acid solution storage tank, next absorber portion be adjacent is entered through second acid pump from acid solution storage tank liquid out, after completing absorption process, the bottom acid solution outlet of circulation acid solution from then on absorber portion is discharged, and again enter acid solution storage tank, cyclical operation like this, in the process, part acid solution is also sent into crystallization workshop section by acid solution storage tank while adding acid solution, technique two is: a part of circulation acid solution enters its next absorber portion by acid solution entrance, and from then on bottom absorber portion, acid solution out enters dashpot by acid solution outlet, then through first acid pump, circulation enters absorber portion.
Compared with prior art, a kind of multistage ammonia nitrogen waste water removing process of the present invention and equipment stably can carry out ammonia aeration process under different ambient conditions, and production efficiency is high; Meanwhile, because stripping process is carried out in a tower, reduce the power loss because pipe resistance causes, while improve ammonia removal rate, reduce processing cost expense; Air recycle after few heat compensation, compares traditional ammonia distillation process energy-conservation more than 90%; Conventional art is compared without the need to adding the alkali lye as running stores, more environmental protection in whole technique, and the production cost reduced; The ammonia nitrogen waste liquid of high density is finally made to reach discharging standards after removing process.In ammonia nitrogen waste water removing process of the present invention and equipment; the technique adopted is by hot air circulate stripping; without the need to stripping tower will be drawn containing ammonia waste liquid; waste liquid directly reaches discharging standards in stripping tower after stripping, and adopt hot air circulate deamination in this process, technique is simple; energy consumption is low; be conducive to energy-saving and emission-reduction, protection of the environment, be suitable for industrial application.
Accompanying drawing explanation
Fig. 1 is equipment overall structure and the process flow diagram of the present invention's multistage ammonia nitrogen waste water removing process and a kind of embodiment of equipment; Stripping tower in figure is tray column.
Fig. 2 is the stripping tower structural representation of the present invention's multistage ammonia nitrogen waste water removing process and a kind of embodiment of equipment; In this figure, stripping tower is tray column, comprises 2 stripping sections and 3 absorber portions in stripping tower.
Fig. 3 is the stripping tower structural representation of the present invention's multistage ammonia nitrogen waste water removing process and a kind of embodiment of equipment; Stripping tower in this figure comprises 2 stripping sections and 3 absorber portions, and the stripping tower in figure is packing tower.
Embodiment
The present invention is described further below in conjunction with embodiment and accompanying drawing thereof:
The multistage ammonia nitrogen waste water of the present invention's design removes equipment (see Fig. 1-2), mainly comprises: stripping tower 1, air accumulator 3, airheater 4, blower fan 6, waste drains pump 8, two acid pumps, acid solution storage tank and dashpots 15; It is characterized in that one end of described air accumulator 3, one end of airheater 4 and blower fan 6 is connected in series successively with one group of pipeline, the other end of air accumulator 3 is connected with the air vout 2 of stripping tower 1, and the other end of blower fan 6 is connected with the gas inlet 7 of stripping tower 1; Waste drains pump 8 one group of pipeline is connected with the waste liquid entrance 91 of stripping tower 1; Dashpot 15 and first acid pump 171, one group of pipeline are connected in series, and first acid pump 171 is connected with the acid solution entrance 161 of stripping tower 1, second acid pump 172 and acid solution storage tank 18 one group of pipeline are connected in series, acid solution storage tank 18 also exports 166 with the acid solution of stripping tower 1 and is connected, and second acid pump 172 is connected with the acid solution entrance 165 of stripping tower; Comprise absorber portion 10 and stripping section 11 that design quantity requires in described stripping tower 1, one deck is installed between each absorber portion 10 and each stripping section 11 and breaks tower tray 12; For the tray column of column internals composition primarily of column plate composition, each absorber portion 10 comprises the tower tray 13 of design quantity, and each stripping section 11 comprises the tower tray 13 of design quantity; For column internals composition primarily of the packing tower of filler composition, comprise a set of sparger 19 in each absorber portion 10 and one section of filler 20 forms, in each stripping section 11, comprise a set of sparger 19 and one section of filler 21.
How much relevant with the liquid measure containing ammonia waste liquid by tower tray height absorber portion of the present invention is with the design quantity of stripping section; The quantity of disconnected tower tray is also relevant with the quantity of absorber portion and stripping section simultaneously.
Tower tray described in present device can be the one in arbitrary form of the prior art.But embodiment preferentially adopts applicant No. ZL200910067917.2 to require the 1 a kind of film spray no-back mixing column plate recorded in first patent of invention right.This tower tray has the advantages such as resistance is low, turndown ratio is large, is particularly useful for easily stifled system.
As preferably, the multistage ammonia nitrogen waste water of the present invention removes equipment can be provided with silk screen Despumation device at the top of absorber portion, and this device can catch most of granular drop, to reach the content reducing drop in air, effectively prevents drop from entering in air.Described silk screen Despumation device is originally as prior art.
The present invention devises a kind of multistage ammonia nitrogen waste water removing process (being called for short technique, see Fig. 1-3) simultaneously, and this technique adopts multistage ammonia nitrogen waste water of the present invention to remove equipment, and comprises air cycle technique, process for treating waste liquor and acid cycle technique.Described air cycle technique is: first enter air accumulator 3 from the air of stripping tower 1 top air outlet 2, then airheater 4 is entered, air after heating enters first stripping section 111 bottom stripping tower 1 by gas inlet 7 after blower fan 6, the first absorber portion 101 above it is entered by first disconnected tower tray 121 through air after this stripping section 111, air enters second stripping section 112 by second disconnected tower tray 122 again afterwards, second absorber portion 102 is entered by the 3rd disconnected tower tray 123 through air after this stripping section 112, and then by the 3rd stripping section, 4th disconnected tower tray, 3rd absorber portion, by that analogy, until air is absorber portion by last, and make 2 absorber portions adjacent, the quantity of described stripping section, disconnected tower tray and absorber portion can carry out designing or adjusting according to actual condition, air enters airline by exporting 2 by overhead air after all stripping sections, disconnected tower tray and absorber portion, finally again enter air accumulator 3, so complete primary air recycle, described process for treating waste liquor is: containing ammonia waste liquid by waste drains pump 8 from waste liquid entrance 91 enter topmost stripping section 112 top with enter tower air inversion and contact, carry out mass-transfer progress, waste liquid after process again enters the stripping section 111 below next-door neighbour after bottom waste stream outlet 92 discharge of this stripping section 112, again with enter tower air inversion and contact, carry out mass-transfer progress, the from then on stripping section 111 bottom waste stream outlet of the waste liquid after process 94 is discharged, acid cycle technique: the top being entered absorber portion 103 topmost in stripping tower 1 from dashpot 15 acid solution out by first acid pump 171 by acid solution entrance 161, contact with air inversion, ammonia is allowed to transfer to from air in acid solution, make to be purified containing ammonia air, reacted acid solution exports 162 out from the bottom acid solution of this absorber portion 103 after assembling on disconnected tower tray 124, divide two portions technique trend, technique one: a part of acid solution enters acid solution storage tank 18, next absorber portion 102 be adjacent is entered through second acid pump 172 from acid solution storage tank 18 liquid out, after completing absorption process, the bottom acid solution outlet 166 of circulation acid solution from then on absorber portion 102 is discharged, and again enter acid solution storage tank 18, cyclical operation like this, part acid solution is also sent into crystallization workshop section by acid solution storage tank 18 while adding acid solution in the process, crystallization ammonium sulfate, technique two: a part of circulation acid solution enters its next absorber portion 101 by acid solution entrance 163, from then on bottom absorber portion 101, acid solution out enters dashpot by acid solution outlet 164, then through first acid pump 171, enters absorber portion 103 and circulate.
Ammonia nitrogen waste water removing process of the present invention enters stripping tower 1 by after preheating of air by blower fan 6, after stripping, nitrogenous effluent reaches after emission standard requires and discharges, air is then through heat compensation Posterior circle and utilizes, and thus has energy-saving and emission-reduction, the benefit of useful environmental protection.
As preferably, the thermal source of airheater 4 used also can be low-temperature water heating.
In ammonia nitrogen waste water removing process of the present invention, the temperature of air after temperature element 5 thermometric, first need carry out heat compensation, after reaching design temperature scope, then sends into stripping tower 1; The described design temperature scope entering stripping tower 1 air is 40-60 DEG C.
The present invention does not address part and is applicable to prior art.
Provide specific embodiments of the invention below:
Embodiment 1
Design a kind of multistage ammonia nitrogen waste water removing process and equipment (see accompanying drawing 1,2), mainly comprise: stripping tower 1, air accumulator 3, airheater 4, blower fan 6, waste drains pump 8, two acid pumps (i.e. first acid pump 171 and second acid pump 172), acid solution storage tank 18 and dashpot 15; 3 absorber portions 10 are comprised and 2 stripping sections, 11,3 absorber portions 10 comprise absorber portion 101, absorber portion 102, absorber portion 103 in stripping tower 1; 2 stripping sections comprise stripping section 111 and stripping section 112; Include 2 layers of tower tray 13 in the absorber portion 101 of the present embodiment, absorber portion 102, absorber portion 103, stripping section 111 comprises 7 layers of MP tower tray 13, and stripping section 112 comprises 6 layers of MP tower tray 13; All have an intake chute 14 under most end one deck tower tray of each absorber portion and each stripping section, the present embodiment is provided with 5 intake chutes 14; Disconnected tower tray 12 is had to separate between absorber portion 10 and stripping section 11; Disconnected tower tray 124 is had to separate between absorber portion 101 and absorber portion 102, disconnected tower tray 123 is had to separate between absorber portion 102 and stripping section 111, there is disconnected tower tray 122 to separate between stripping section 111 and absorber portion 103, between absorber portion 103 and stripping section 112, have disconnected tower tray 121 to separate; Described air accumulator 3, airheater 4 and blower fan 6 one group of pipeline is connected successively, and air accumulator 3 is connected with the air vout 2 of stripping tower 1, and blower fan 6 is connected with the gas inlet 7 of stripping tower 1; Waste drains pump 8 one group of pipeline is connected with the waste liquid entrance 91 of stripping tower 1; Dashpot 15 and raw material acid liquid pump 171 one group of pipeline are connected, and first acid pump 171 is connected with the acid solution entrance 161 of stripping tower 1; Second acid pump 172 and acid solution storage tank 18 one group of pipeline are connected successively, and acid solution storage tank 18 exports 166 with the acid solution of stripping tower 1 and is connected, and second acid pump 172 is connected with the acid solution entrance 165 of stripping tower 1.
The multistage ammonia nitrogen waste water removing process of embodiment and equipment are realized by three technical process, comprise air cycle technique, process for treating waste liquor, acid cycle technique, described air cycle technique is: first enter air accumulator 3 from the air of stripping tower 1 top air outlet 2, then airheater 4 is entered, air after heating enters the first stripping section 111 bottom stripping tower 1 by gas inlet 7 after blower fan 6, the first absorber portion 101 above it is entered by disconnected tower tray 121 through air after this stripping section 111, air enters second stripping section 112 by disconnected tower tray 122 again afterwards, second absorber portion 102 is entered by disconnected tower tray 123 through air after this stripping section 112, then the 3rd absorber portion 103 is entered by disconnected tower tray 124, air is by all stripping sections 11, airline is entered by overhead air outlet 2 after disconnected tower tray 12 and absorber portion 10, finally again enter air accumulator 3, so complete primary air recycle, process for treating waste liquor: enter stripping section 112 top and enter tower air inversion and contact by waste drains pump 8 from waste liquid entrance 91 containing ammonia waste liquid, carry out mass-transfer progress, waste liquid after process again enters the stripping section 111 below next-door neighbour after bottom waste stream outlet 92 discharge of this stripping section 112, again with enter tower air inversion and contact, carry out mass-transfer progress, the from then on stripping section bottom waste stream outlet of the waste liquid after process 94 is discharged, acid cycle technique: the top being entered absorber portion 103 topmost in stripping tower 1 from dashpot 15 acid solution out by first acid pump 171 by acid solution entrance 161, contact with air inversion, ammonia is allowed to transfer to from air in acid solution, make to be purified containing ammonia air, reacted acid solution exports 162 out from the bottom acid solution of this absorber portion 103 after assembling on disconnected tower tray 124, divide two portions technique trend, technique one: a part of acid solution enters acid solution storage tank 18, next absorber portion 102 be adjacent is entered through second acid pump 172 from acid solution storage tank 18 liquid out, after completing absorption process, the bottom acid solution outlet 166 of acid solution from then on absorber portion 102 is discharged, and again enter acid solution storage tank 18, cyclical operation like this, part acid solution is also sent into crystallization workshop section by acid solution storage tank 18 while adding acid solution in the process, technique two: a part of acid solution enters its next absorber portion 101 by acid solution entrance 163, from then on bottom absorber portion 101, acid solution out enters dashpot 15 by acid solution outlet 164, then through first acid pump 171, circulation enters absorber portion 103.
Embodiment 2
Design another kind of multistage ammonia nitrogen waste water and remove equipment.This equipment connects identical with the peripheral equipment of embodiment 1 with process pipeline, and technical process principle is also identical.Be that described stripping tower 1 is packing tower (see Fig. 3) with the difference of embodiment 1, each absorber portion 10 in stripping tower 1 forms by the CJ-structured packing 20 of a set of tank type liquid distributor 19 and 1 meter high; Each stripping section 11 forms by the CJ-structured packing 21 of a set of slot type sample liquid distributor 19 and a section 3.5 meters high.
In multistage ammonia nitrogen waste water removing process, the temperature of air need carry out heat compensation after temperature element thermometric, enters stripping tower 1 after reaching specified for temperature ranges, and the temperature range entering stripping tower 1 air is 40-60 DEG C.
The foregoing is only a specific embodiment of tray column of the present invention and packing tower; device structure of the present invention and technology characteristics are not limited thereto; any those skilled in the art are in technical scheme of the present invention, and the non-creativeness change done or modification are all encompassed among the claims of the application.
Claims (2)
1. a multistage ammonia nitrogen waste water removing process, this technique adopts following multistage ammonia nitrogen waste water to remove equipment, and comprises air cycle technique, process for treating waste liquor and acid cycle technique;
Described equipment mainly comprises: stripping tower, air accumulator, airheater, blower fan, waste drains pump, acid pump, acid solution storage tank and dashpot; It is characterized in that one end of described air accumulator, one end of airheater and blower fan is connected in series successively with one group of pipeline, the other end of air accumulator is connected with the air vout of stripping tower, and the other end of blower fan is connected with the gas inlet of stripping tower; Waste drains pump one group of pipeline is connected with the waste liquid entrance of stripping tower; Dashpot and first acid pump, one group of pipeline are connected in series, and first acid pump is connected with the acid solution entrance of stripping tower, second acid pump and acid solution storage tank one group of pipeline are connected in series, acid solution storage tank exports with the acid solution of stripping tower and is connected, and second acid pump is also connected with the acid solution entrance of stripping tower; Comprise absorber portion and stripping section that design quantity requires in described stripping tower, one deck is installed between each absorber portion and each stripping section and breaks tower tray; For the tray column of column internals composition primarily of column plate composition, each absorber portion comprises the tower tray of design quantity, and each stripping section comprises the tower tray of design quantity; For the packing tower of column internals composition primarily of filler composition, comprise a set of sparger and one section of filler composition in each absorber portion, in each stripping section, comprise a set of sparger and one section of filler;
Described air cycle technique is: first the air come from stripping tower top air outlet enters air accumulator, then airheater is entered, air after heating enters first stripping section bottom stripping tower by gas inlet after blower fan, the first absorber portion above it is entered by first disconnected tower tray through air after this stripping section, air enters second stripping section by second disconnected tower tray again afterwards, second absorber portion is entered by the 3rd disconnected tower tray through air after this stripping section, and then by the 3rd stripping section, 4th disconnected tower tray, 3rd absorber portion, by that analogy, until air is by last absorber portion, and 2 absorber portions are adjacent, the quantity of described stripping section, disconnected tower tray and absorber portion can carry out designing or adjusting according to actual condition, air enters airline by being exported by overhead air after all stripping sections, disconnected tower tray and absorber portion, finally again enter air accumulator, so complete primary air recycle, described process for treating waste liquor is: containing ammonia waste liquid by waste drains pump from waste liquid entrance enter topmost stripping section top with enter tower air inversion and contact, carry out mass-transfer progress, waste liquid after process again enters the stripping section below next-door neighbour after the bottom waste stream outlet discharge of this stripping section, again with enter tower air inversion and contact, carry out mass-transfer progress, the from then on stripping section bottom waste stream outlet of the waste liquid after process is discharged, described acid cycle technique is: the top being entered absorber portion topmost in stripping tower from dashpot acid solution out by first acid pump by acid solution entrance, contact with air inversion, ammonia is allowed to transfer to from air in acid solution, make to be purified containing ammonia air, reacted acid solution exports out from the bottom acid solution of this absorber portion after assembling on disconnected tower tray, divide two portions technique trend: technique one is: a part of acid solution enters acid solution storage tank, next absorber portion be adjacent is entered through second acid pump from acid solution storage tank liquid out, after completing absorption process, the bottom acid solution outlet of circulation acid solution from then on absorber portion is discharged, and again enter acid solution storage tank, cyclical operation like this, in the process, part acid solution is also sent into crystallization workshop section by acid solution storage tank while adding acid solution, technique two is: a part of circulation acid solution enters its next absorber portion by acid solution entrance, and from then on bottom absorber portion, acid solution out enters dashpot by acid solution outlet, then through first acid pump, circulation enters absorber portion.
2. multistage ammonia nitrogen waste water removing process according to claim 1, is characterized in that the temperature of described air after temperature element thermometric, first need carry out heat compensation, after reaching design temperature scope, then sends into stripping tower; The design temperature scope entering stripping tower air is 40-60 DEG C.
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| CN103979627A (en) * | 2014-04-03 | 2014-08-13 | 江苏蓝晨环保科技有限公司 | Multistage efficient gas stripping system of ammonia nitrogen wastewater |
| CN108840476A (en) * | 2018-06-29 | 2018-11-20 | 江苏海容热能环境工程有限公司 | A kind of technique that sludge drying distilled water removes ammonia nitrogen, COD |
| CN108840475B (en) * | 2018-06-29 | 2021-05-25 | 江苏海容热能环境工程有限公司 | Sludge drying distilled water removes ammonia nitrogen system |
| CN109319976B (en) * | 2018-10-29 | 2022-01-28 | 江西铜鼓有色冶金化工有限责任公司 | Process for treating ammonia nitrogen wastewater by adopting gaseous membrane |
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| CN102311150A (en) * | 2011-04-02 | 2012-01-11 | 中冶焦耐(大连)工程技术有限公司 | Process for reducing CN<-> content in ammonia evaporation 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 |
| CN102923896A (en) * | 2012-11-07 | 2013-02-13 | 天津大学 | Deaminizing method and device for high-concentration ammonia-containing waste water |
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| CN103449551A (en) | 2013-12-18 |
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