CN204644041U - A kind of ammonia nitrogen waste water treatment system - Google Patents
A kind of ammonia nitrogen waste water treatment system Download PDFInfo
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- CN204644041U CN204644041U CN201520328303.6U CN201520328303U CN204644041U CN 204644041 U CN204644041 U CN 204644041U CN 201520328303 U CN201520328303 U CN 201520328303U CN 204644041 U CN204644041 U CN 204644041U
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- ammoniacal liquor
- ammonia nitrogen
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Abstract
The utility model belongs to chemical technology field, discloses a kind of ammonia nitrogen waste water treatment system, comprising: pretreatment unit, receives ammonia nitrogen waste water, regulates its temperature and pH value; Rectification cell, is connected with described pretreatment unit, performs distillation operation ammoniacal liquor condensing unit, is connected with described rectification cell, and the ammonia nitrogen steam produce distillation operation and water vapor condensation, obtain ammoniacal liquor; Second lime set unit, is connected with described ammoniacal liquor condensing unit, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condensing unit and water vapor absorption and lime set; Wherein, the output terminal of described ammoniacal liquor condensing unit is connected with described rectification cell input terminus, and the ammoniacal liquor that described ammoniacal liquor condensing unit produces is carried out circulation rectifying, regulation and control ammonia concn.The utility model realizes the high-quality ammoniacal liquor reclaimer operation of less energy-consumption by pressure-fired environment and the operation of secondary lime set.
Description
Technical field
The utility model relates to chemical technology field, particularly a kind of ammonia nitrogen waste water treatment system.
Background technology
Ammonia nitrogen waste water is a kind of common Chemical Manufacture, medicine, a kind of used water difficult to degradate that metallurgy industry, organosilicon industry produce in producing.
Traditional deamination method has biochemical process, blow-off method, vaporizing extract process, MAP method.
But the application's utility model people is in the process realizing utility model technical scheme in the embodiment of the present application, find that above-mentioned technology at least exists following technical problem:
Biochemical process and MAP method are difficult to process high-concentration ammonia nitrogenous wastewater, and blow-off method is suitable for the ammonia nitrogen waste water process of ammonia nitrogen concentration at below 2000ppm, although vaporizing extract process can process high-concentration ammonia nitrogenous wastewater, energy consumption is high, and it is unstable to reclaim ammoniacal liquor quality.
Utility model content
The utility model provides a kind of ammonia nitrogen waste water treatment system, and solve in prior art, energy consumption is high, reclaims the technical problem of ammoniacal liquor quality instability, reaches reduction energy consumption, promotes the technique effect of ammoniacal liquor quality and reliability.
For solving the problems of the technologies described above, the utility model provides a kind of ammonia nitrogen waste water treatment system, comprising:
Pretreatment unit, receives ammonia nitrogen waste water, regulates its temperature and pH value;
Rectification cell, is connected with described pretreatment unit, performs distillation operation;
Ammoniacal liquor condensing unit, is connected with described rectification cell, and the ammonia nitrogen steam produce distillation operation and water vapor condensation, obtain ammoniacal liquor;
Second lime set unit, is connected with described ammoniacal liquor condensing unit, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condensing unit and water vapor absorption and lime set;
Wherein, the output terminal of described ammoniacal liquor condensing unit is connected with described rectification cell input terminus, and the ammoniacal liquor that described ammoniacal liquor condensing unit produces is carried out circulation rectifying, regulation and control ammonia concn.
Further, described pretreatment unit comprises:
PH value setting device, is connected with ammonia nitrogen waste water transfer line, in ammonia nitrogen waste water, inject alkalescence or acid reagent, regulates pH value;
Heat exchanger, is connected with the output terminal of described ammonia nitrogen waste water transfer line and described rectification cell, promotes ammonia nitrogen waste water temperature;
Wherein, the intermediate solution of described ammonia nitrogen waste water and described rectification cell realizes heat exchange in described heat exchanger, promotes the temperature of described ammonia nitrogen waste water.
Further, described rectification cell comprises:
Rectifying tower, is connected with described pretreatment unit, receives ammonia nitrogen waste water, performs distillation operation;
Reboiler, is connected with described rectifying tower, provides thermal source;
Still liquid Send out pump, is connected with described rectifying tower, and described rectifier bottoms still liquid is returned described rectifying tower through described heat exchanger.
Further, described ammoniacal liquor condensing unit comprises:
Ammoniacal liquor condenser, is connected with described rectification cell, and the ammonia nitrogen steam that absorption distillation operation produces and water vapor condensation, obtain ammoniacal liquor;
Ammoniacal liquor lime set tank, is connected with described ammoniacal liquor condenser output terminal, collects described ammoniacal liquor;
Ammoniacal liquor lime set pump, is connected between described ammoniacal liquor lime set tank and described rectification cell by pipeline;
Wherein, the ammoniacal liquor in ammoniacal liquor lime set tank is carried to rectification cell by described ammonia circulation pump, realizes circulation distillation operation.
Further, described second lime set unit comprises:
Venturi scrubber, is connected with described ammoniacal liquor condenser, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condenser and water vapor absorption and lime set;
Ammonia circulation tank, is connected with described Venturi scrubber, collects the ammoniacal liquor lime set in described Venturi scrubber;
Ammonia circulation pump and ammonia circulation water cooler, be connected with described ammonia circulation tank, by the ammoniacal liquor in described ammonia circulation tank successively by ammonia circulation pump and ammonia circulation water cooler, returns in ammonia circulation tank, realize circulating cooling.
Further, the tower top working pressure scope of described rectifying tower is 1kpa ~ 5kpa.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
1, adopt succinct vibrational power flow, make system held at slight positive pressure state, effectively solve in prior art, device pressure is in the problem of high pressure conditions all the time, thus achieves the boiling point reducing ammonia nitrogen waste water, reduces the technique effect of energy consumption.
2, adopt Venturi scrubber to carry out secondary lime set, solve in prior art, the problem of solidifying the gas high and ammonia concn instability of the energy consumption that causes of lime set repeatedly, achieves reduction energy consumption, the technique effect of lifting ammoniacal liquor q&r.
3, the mode adopting pressure-fired to control, is stabilized in the scope of 1kpa ~ 5kpa, is conducive to being separated of ammonia nitrogen and water, greatly improves processing efficiency, reduces energy consumption.
Accompanying drawing explanation
The structural representation of the ammonia nitrogen waste water treatment system that Fig. 1 provides for the utility model embodiment.
Embodiment
The embodiment of the present application provides a kind of ammonia nitrogen waste water treatment system, solves in prior art, the complexity setting of NH_3-N treating technique and the problem of the high power consumption caused by it and ammoniacal liquor reliability deficiency of low quality; Achieve reduction power consumption, promote the problem that ammoniacal liquor reclaims quality and efficiency.
For solving the problems of the technologies described above, the thinking of the technical scheme that the embodiment of the present application provides is as follows:
A kind of ammonia nitrogen waste water treatment system, comprising:
Pretreatment unit, receives ammonia nitrogen waste water, regulates its temperature and pH value;
Rectification cell, is connected with described pretreatment unit, performs distillation operation;
Ammoniacal liquor condensing unit, is connected with described rectification cell, and the ammonia nitrogen steam produce distillation operation and water vapor condensation, obtain ammoniacal liquor;
Second lime set unit, is connected with described ammoniacal liquor condensing unit, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condensing unit and water vapor absorption and lime set;
Wherein, the output terminal of described ammoniacal liquor condensing unit is connected with described rectification cell input terminus, and the ammoniacal liquor that described ammoniacal liquor condensing unit produces is carried out circulation rectifying, regulation and control ammonia concn.
Can be found out that by foregoing the vibrational power flow of described system by simplifying realizes the pressure-fired environment in system running, system tended towards stability, and then reduces the power consumption of each equipment; Meanwhile, improved the condensation efficiency of ammoniacal liquor by the setting of time condensation unit, reduce power consumption on the one hand, promote the stability that ammoniacal liquor reclaims concentration on the other hand, reliability.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail, the specific features being to be understood that in the utility model embodiment and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present application and embodiment can combine mutually.
See Fig. 1, in the utility model embodiment, a kind of ammonia nitrogen waste water treatment system of proposition, comprising:
Pretreatment unit, receives ammonia nitrogen waste water, regulates its temperature and pH value;
Rectification cell, is connected with described pretreatment unit, performs distillation operation;
Ammoniacal liquor condensing unit, is connected with described rectification cell, and the ammonia nitrogen steam produce distillation operation and water vapor condensation, obtain ammoniacal liquor;
Second lime set unit, is connected with described ammoniacal liquor condensing unit, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condensing unit and water vapor absorption and lime set;
Wherein, the output terminal of described ammoniacal liquor condensing unit is connected with described rectification cell input terminus, and the ammoniacal liquor that described ammoniacal liquor condensing unit produces is carried out circulation rectifying, regulation and control ammonia concn.
The vibrational power flow of introducing system and the operation of operation process respectively below.
First concrete vibrational power flow is introduced.
Pretreatment unit comprises: pH value setting device 1, mixed pipe line 2 and heat exchanger 3; Wherein mixed pipe line 2 connects extraneous next ammonia nitrogen waste water transport pipeline, and pH value setting device 1 is connected to the leading portion of mixed pipe line 2, and heat exchanger 3 is connected to the end of mixed pipe line 2.
Rectification cell comprises: rectifying tower 4, reboiler 5 and still liquid Send out pump 6; Rectifying tower 4 is connected with the output terminal of heat exchanger 3; Reboiler 5 is connected with rectifying tower 4 provides thermal source, and the tower reactor of rectifying tower 4 connects the input terminus of heat exchanger 3 by still liquid Send out pump 6.
Ammoniacal liquor condensing unit comprises: ammoniacal liquor condenser 7, ammoniacal liquor lime set tank 8 and ammoniacal liquor lime set pump 9; The input terminus of ammoniacal liquor condenser 7 is connected with rectifying tower 4, receives the mixed gas of ammonia nitrogen steam and water vapour; Described ammoniacal liquor drainer 8 connects ammoniacal liquor condenser 7, collects ammoniacal liquor; Ammoniacal liquor lime set pump 9 is connected between ammoniacal liquor lime set tank 8 and rectifying tower 4, is communicated with ammonia circulation rectifying pipeline.
Second lime set unit comprises: Venturi scrubber 10, ammonia circulation tank 11, ammonia circulation pump 12 and cyclic ammonia water water cooler 13; Venturi scrubber 10 connects ammoniacal liquor condenser 7, collects not solidifying mixed gas; Ammonia circulation tank 11 connects the output terminal of Venturi scrubber 10, collects ammoniacal liquor; Ammonia circulation tank 11 delivery port connects the input aperture of Venturi scrubber 10 by ammonia circulation pump 12 and cyclic ammonia water water cooler 13, form ammonia circulation cooling line.
The running operation of introducing system below.
When performing ammonia nitrogen waste water process operation, connecing the ammonia nitrogen waste water attracted from alert area, realizing pipeline connection by transport pipeline mixed pipe line 2 being connected alert area.In mixed pipe line 2, discharged the pH value of the ammonia nitrogen waste water in acid or basic solution adjustment pipeline by pH value setting device 1, the target span usually regulating pH value is 10.5 ~ 11.5.Ammonia nitrogen waste water after pH value adjustment operation is delivered to heat exchanger 3 by pipeline and is realized temperature adjustment, is generally promote temperature, thus reduces the impact on distillation operation, promote the efficiency of distillation operation.
In the present embodiment, heat exchanger 3 is connected on the tower bottoms circulation line of rectifying tower 4, heated the ammonia nitrogen waste water out-of-bounds inputted by high temperature tower bottoms, thus utilize tower bottoms waste heat efficiently, lifting system energy utilization rate, thus reduce energy consumption.
By the ammonia nitrogen waste water of pretreatment unit, injection rectifying tower 4 is carried out distillation operation, provide thermal source by the reboiler 5 be connected with the tower reactor of rectifying tower 4.Adopt the ammonia nitrogen waste water in exogenous steam heating rectifying tower 4, produce ammonia nitrogen steam to rising, discharge to tower top, wherein pacify vapour concentration and be not less than 30%; Period, contact with the ammonia nitrogen waste water that pretreatment unit is sent here, realize heating further; In process, pumped by the tower bottoms of tower reactor, be transported to the top of rectifying tower 4 by still liquid Send out pump 6, perform distillation operation, recirculation like this, progressively promotes ammonia nitrogen concentration, continues to export ammonia nitrogen steam, completes the Preliminary operation that ammonia nitrogen reclaims.
In the process, tower bottoms is when still liquid Send out pump 6 exports, and by heat exchanger 3, realize tower bottoms and realize heat exchange with the ammonia nitrogen waste water out-of-bounds inputted, promote rectification efficiency on the one hand, that face of the opposing party reduces energy consumption.
The ammonia nitrogen steam of being discharged by rectifying tower 4 and the mixed gas of water vapour are delivered directly to ammoniacal liquor condenser 7, and condensation obtains ammoniacal liquor, and collect storage by ammoniacal liquor lime set tank 8.
In process, ammonia concn in Real-Time Monitoring ammoniacal liquor lime set tank 8, if concentration is too low, by the ammoniacal liquor lime set pump 9 be connected with ammoniacal liquor lime set tank 8, ammoniacal liquor is transmitted back to rectifying tower 4 rectifying again, to promote ammonia concn, circulation like this, progressively promotes the ammonia concn in ammoniacal liquor lime set tank 8, until meet the concentration that ammoniacal liquor reclaims demand; In process, in the still liquid after circulation rectifying, ammonia nitrogen concentration continues to reduce, thus by the chain operation of variable valve group, be transported to out-of-bounds by still liquid Send out pump 3, period, the waste heat of still liquid heats ammonia nitrogen waste water by heat exchanger 3, realizes high efficiency of energy and utilizes.
Wherein, the still liquid of discharge is qualified purifying waste water, and its ammonia-nitrogen content is lower than 15ppm.
In ammoniacal liquor condenser 7, the ammonia nitrogen steam of non-lime set and water vapour, absorb lime set by Venturi scrubber 10, and collected by ammonia circulation tank 11, forms ammoniacal liquor; In order to ensure the efficiency of Venturi scrubber 10, circulating cooling pipeline being set, namely by ammonia circulation pump 12, the ammoniacal liquor in ammonia circulation tank 11 being pumped, cool through cyclic ammonia water water cooler 13, be transported in Venturi scrubber 10, circulating cooling like this, in ammonia circulation tank 11, generate ammoniacal liquor; In process, in order to reach good ammonia assimilation effect, circulation also temperature be cooled to less than 42 DEG C, the circulation fluid temperature in usual Venturi scrubber 10 preferably at 38 DEG C ~ 40 DEG C, to ensure good assimilation effect; The mass concentration scope of cyclic ammonia water is 15% ~ 28%.
Further, system stability runs in the scope of 1kpa ~ 5kpa, realizes being separated of high efficiency ammonia nitrogen and water; Owing to being pressure-fired, the boiling point of ammonia nitrogen waste water is relative to lower under normal pressure or pressurized condition, and thus energy consumption is lower.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
1, adopt succinct vibrational power flow, make system held at slight positive pressure state, effectively solve in prior art, device pressure is in the problem of high pressure conditions all the time, thus achieves the boiling point reducing ammonia nitrogen waste water, reduces the technique effect of energy consumption.
2, adopt Venturi scrubber to carry out secondary lime set, solve in prior art, the problem of solidifying the gas high and ammonia concn instability of the energy consumption that causes of lime set repeatedly, achieves reduction energy consumption, the technique effect of lifting ammoniacal liquor q&r.
3, the mode adopting pressure-fired to control, is stabilized in the scope of 1kpa ~ 5kpa, is conducive to being separated of ammonia nitrogen and water, greatly improves processing efficiency, reduces energy consumption.
It should be noted last that, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to example, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (6)
1. an ammonia nitrogen waste water treatment system, is characterized in that, comprising:
Pretreatment unit, receives ammonia nitrogen waste water, regulates its temperature and pH value;
Rectification cell, is connected with described pretreatment unit, performs distillation operation;
Ammoniacal liquor condensing unit, is connected with described rectification cell, and the ammonia nitrogen steam produce distillation operation and water vapor condensation, obtain ammoniacal liquor;
Second lime set unit, is connected with described ammoniacal liquor condensing unit, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condensing unit and water vapor absorption and lime set;
Wherein, the output terminal of described ammoniacal liquor condensing unit is connected with described rectification cell input terminus, and the ammoniacal liquor that described ammoniacal liquor condensing unit produces is carried out circulation rectifying, regulation and control ammonia concn.
2. ammonia nitrogen waste water treatment system as claimed in claim 1, it is characterized in that, described pretreatment unit comprises:
PH value setting device, is connected with ammonia nitrogen waste water transfer line, in ammonia nitrogen waste water, inject alkalescence or acid reagent, regulates pH value;
Heat exchanger, is connected with the output terminal of described ammonia nitrogen waste water transfer line and described rectification cell, promotes ammonia nitrogen waste water temperature;
Wherein, the intermediate solution of described ammonia nitrogen waste water and described rectification cell realizes heat exchange in described heat exchanger, promotes the temperature of described ammonia nitrogen waste water.
3. ammonia nitrogen waste water treatment system as claimed in claim 2, it is characterized in that, described rectification cell comprises:
Rectifying tower, is connected with described pretreatment unit, receives ammonia nitrogen waste water, performs distillation operation;
Reboiler, is connected with described rectifying tower, provides thermal source;
Still liquid Send out pump, is connected with described rectifying tower, and described rectifier bottoms still liquid is returned described rectifying tower through described heat exchanger.
4. ammonia nitrogen waste water treatment system as claimed in claim 1, it is characterized in that, described ammoniacal liquor condensing unit comprises:
Ammoniacal liquor condenser, is connected with described rectification cell, and absorption distillation operates the ammonia nitrogen steam and water vapour condensation that produce, obtains ammoniacal liquor;
Ammoniacal liquor lime set tank, is connected with described ammoniacal liquor condenser output terminal, collects described ammoniacal liquor;
Ammoniacal liquor lime set pump, is connected between described ammoniacal liquor lime set tank and described rectification cell by pipeline;
Wherein, the ammoniacal liquor in ammoniacal liquor lime set tank is carried to rectification cell by described ammoniacal liquor lime set pump, realizes circulation distillation operation.
5. ammonia nitrogen waste water treatment system as claimed in claim 4, it is characterized in that, described second lime set unit comprises:
Venturi scrubber, is connected with described ammoniacal liquor condenser, by the not solidifying ammonia nitrogen steam in described ammoniacal liquor condenser and water vapor absorption and lime set;
Ammonia circulation tank, is connected with described Venturi scrubber, collects the ammoniacal liquor lime set in described Venturi scrubber;
Ammonia circulation pump and ammonia circulation water cooler, be connected with described ammonia circulation tank, by the ammoniacal liquor in described ammonia circulation tank successively by ammonia circulation pump and ammonia circulation water cooler, returns in ammonia circulation tank, realize circulating cooling.
6. ammonia nitrogen waste water treatment system as claimed in claim 3, is characterized in that: the tower top working pressure scope of described rectifying tower is 1kpa ~ 5kpa.
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| CN201520328303.6U CN204644041U (en) | 2015-05-20 | 2015-05-20 | A kind of ammonia nitrogen waste water treatment system |
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| CN201520328303.6U CN204644041U (en) | 2015-05-20 | 2015-05-20 | A kind of ammonia nitrogen waste water treatment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104829032A (en) * | 2015-05-20 | 2015-08-12 | 武汉宏澳绿色能源工程有限责任公司 | Ammonia-nitrogen wastewater treatment system |
| CN108190915A (en) * | 2018-01-13 | 2018-06-22 | 安徽金禾实业股份有限公司 | A kind of ammonia vessel is dropped a hint the recovery method and device of middle ammonia |
| CN109607566A (en) * | 2018-12-29 | 2019-04-12 | 江苏索普（集团）有限公司 | A kind of ammonia reclaiming process |
-
2015
- 2015-05-20 CN CN201520328303.6U patent/CN204644041U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104829032A (en) * | 2015-05-20 | 2015-08-12 | 武汉宏澳绿色能源工程有限责任公司 | Ammonia-nitrogen wastewater treatment system |
| CN108190915A (en) * | 2018-01-13 | 2018-06-22 | 安徽金禾实业股份有限公司 | A kind of ammonia vessel is dropped a hint the recovery method and device of middle ammonia |
| CN109607566A (en) * | 2018-12-29 | 2019-04-12 | 江苏索普（集团）有限公司 | A kind of ammonia reclaiming process |
| CN109607566B (en) * | 2018-12-29 | 2022-11-04 | 江苏索普化工股份有限公司 | Ammonia recovery process |
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