CN107487802A - A kind of recycling processing method of high ammonia nitrogen and high salt waste water - Google Patents
A kind of recycling processing method of high ammonia nitrogen and high salt waste water Download PDFInfo
- Publication number
- CN107487802A CN107487802A CN201710799817.3A CN201710799817A CN107487802A CN 107487802 A CN107487802 A CN 107487802A CN 201710799817 A CN201710799817 A CN 201710799817A CN 107487802 A CN107487802 A CN 107487802A
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- processing method
- steam
- rectifying column
- evaporation
- ammonia
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a kind of recycling processing method of high ammonia nitrogen and high salt waste water, this method is coupled rectifying is stripped with evaporation, waste water is evaporated to obtain steam containing ammonia and crystalline salt first, steam containing ammonia is exchanged heat by reboiler so as to provide thermal source for stripping rectifying column, crystalline salt reclaims after centrifugation, the weak aqua ammonia obtained after steam heat-exchanging containing ammonia enters stripping rectifying column deamination concentrate, realizes that ammoniacal liquor reclaims, production is discharged or be back to standard water discharge；The inventive method provides thermal source to evaporate caused indirect steam as stripping rectifying column, water inlet using steam condensate as stripping rectifying column again, without strong corrosive media, without easy fouling components, reduce the blockage problem for solving stripping rectifying column while the requirement to equipment material, it is cost-effective, there are good market prospects.
Description
Technical field
The present invention relates to field of waste water treatment, more particularly to a kind of recycling processing method of high ammonia nitrogen and high salt waste water.
Background technology
At present, in industrial high ammonia nitrogen and high salt field of waste water treatment, waste water is first generally passed through stripping distillation system and taken off
Ammonia treatment, desalting processing is carried out subsequently into multi-effect evaporation system, deamination desalination is finally realized and to reach effluent quality qualified
Purpose.
But because stripping rectifying and evaporation are required for continuing to consume thermal source and energy consumption is higher, traditional handicraft is generally to vapour
Carry distillation system and vapo(u)rization system is heated respectively, reusing for the energy can not be realized, consume a large amount of steam；Secondly,
Severe corrosive ion is usually contained in high ammonia nitrogen and high salt waste water, rectifying and evaporation are stripped in prior art in corrosivity ring
Worked in border, higher is required to equipment material, equipment investment certainly will be caused higher；Again, rectifying column is stripped in strong alkaline condition
Lower work, waste water in traditional handicraft is once contain easy fouling components, it is easy to fouling in the basic conditions, so as to cause stripping smart
Evaporate tower blocking.
Therefore, for the water quality and quantity situation of high ammonia nitrogen and high salt waste water, inventor develops one kind and is applied to high ammonia nitrogen and high
The recycling processing method of salt waste water, this method is flexibly controllable, stable water outlet, reduces energy consumption, cost-effective.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of recycling processing method of high ammonia nitrogen and high salt waste water,
This method is coupled rectifying is stripped with evaporation, the thermal source using indirect steam caused by evaporation as stripping rectifying, not only reduces
To the requirement in terms of stripping rectifying device material, and whole vapo(u)rization system is not required to while realize the Multi-class propagation of energy
End effect condenser is wanted, greatly reduces the dosage of recirculated cooling water, comprehensive energy consumption reduces cost significantly less than traditional handicraft.
To achieve the above object, the present invention uses following technical scheme：
A kind of recycling processing method of high ammonia nitrogen and high salt waste water, stripping rectifying is coupled with evaporation, produced using evaporation
Indirect steam for stripping rectifying thermal source is provided.
The waste water is evaporated to obtain first steam containing ammonia and crystalline salt, the steam containing ammonia by reboiler exchange heat from
And thermal source is provided for stripping rectifying column, the crystalline salt reclaims after centrifugation.
The condensate liquid that steam containing ammonia obtains after reboiler exchanges heat is weak aqua ammonia.
Water inlet of the weak aqua ammonia as stripping rectifying column, is balanced, tower top obtains concentrated ammonia liquor, tower reactor water outlet through multi-stage gas-liquid
Ammonia nitrogen is up to standard.
The evaporation is set to single effect evaporation or multiple-effect evaporation as needed.
When using single effect evaporation, thermal source of the indirect steam caused by single effect evaporation directly as stripping rectifying column.
When using multiple-effect evaporation, using the raw steam of the first effect as original heat source, waste water carries out stepped evaporation, end effect evaporation
Indirect steam as stripping rectifying column thermal source.
Water inlet of the caused condensation water mixed liquid as stripping rectifying column using during waste water stepped evaporation.
Indirect steam first can also be exchanged heat so as to provide heat for stripping rectifying column by reboiler again after compressor compresses
Source.
Methods described processing influent ammonium concentration is more than 1000mg/L, and stripping rectifying recovery ammonia concn is more than 15%, tower reactor
Water outlet ammonia nitrogen concentration is less than 15mg/L.
Compared with prior art, the invention has the advantages that：
1st, coupled using stripping rectifying and evaporation, thermal source is provided using indirect steam caused by evaporation for stripping rectifying column, to steam
Vapour condensed water is stripping rectifying column water inlet, without easy fouling components, solves the blockage problem for stripping rectifying column；
2nd, vapo(u)rization system can be arranged as required to single effect evaporation or multiple-effect evaporation, need to only be realized in the first raw steam of effect supplement
The Multi-class propagation of the energy, and vapo(u)rization system does not need end effect condenser, greatly reduces the dosage of recirculated cooling water, comprehensive energy
Consumption is significantly less than traditional handicraft；
3rd, the steam condensate (SC) of vapo(u)rization system, without strong corrosive media, the material requirement to stripping rectifying device, drop are reduced
Low equipment cost；
4th, treatment method only with stripping rectifying coupled with evaporation and realize effective processing of high ammonia nitrogen and high salt waste water, go out
Water ammonia nitrogen is less than 15mg/L, and recovery ammonia concn is more than 15%, and equipment is simple, flow is short, has good economic benefit.
Brief description of the drawings
Fig. 1 is a kind of device connection figure of the recycling processing method of high ammonia nitrogen and high salt waste water of the present invention；
Fig. 2 is a kind of device connection figure of recycling processing method preferred embodiment 1 of high ammonia nitrogen and high salt waste water of the present invention；
Fig. 3 is a kind of device connection figure of recycling processing method preferred embodiment 2 of high ammonia nitrogen and high salt waste water of the present invention；
Fig. 4 is a kind of device connection figure of recycling processing method preferred embodiment 3 of high ammonia nitrogen and high salt waste water of the present invention.
Wherein：1- crystal separators；2- strips rectifying column；3- heat exchangers；4- reboilers；5- compressors；6- condensate water pots；
7- absorbs, condensation integral type ammoniacal liquor recover.
Embodiment
Further illustrate technical scheme with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of recycling processing method of high ammonia nitrogen and high salt waste water, this method will strip rectifying with evaporating phase
Coupling, thermal source is provided for stripping rectifying using indirect steam caused by evaporation.
Waste water initially enters vapo(u)rization system and is evaporated, and to give birth to steam as thermal source, raw steam enters to be changed wherein vapo(u)rization system
Hot device 3 carries out heat exchange and provides thermal source for evaporator, and evaporation obtains steam containing ammonia and crystal salt, and steam containing ammonia is changed by reboiler 4
Heat for stripping rectifying column 2 so that provide thermal source, water inlet of the condensed weak aqua ammonia of steam containing ammonia as stripping rectifying column 2, dilute ammonia
Water obtains concentrated ammonia liquor after the stripping multi-stage gas-liquid of rectifying column 2 balance in tower top absorption, condensation, realizes that weak aqua ammonia concentrates, tower reactor goes out
Water ammonia nitrogen is up to standard.
According to amount of inlet water and water quality needs, vapo(u)rization system can be set to single effect evaporation or multiple-effect evaporation as shown in Figure 1 two
Effect evaporation, when water inlet only needs single effect evaporation, you can the thermal source directly using the indirect steam of single-action as stripping rectifying；Work as water inlet
When needing to set multiple-effect evaporation, only raw steam source need to be provided in the first effect, waste water is steamed step by step in multi-effect evaporation system
Hair concentration is up to supersaturation crystallization, so as to obtain crystal salt, discharge system after being separated with centrifuge；What whole vapo(u)rization system obtained
It is re-used as stripping the water inlet of rectifying column 2 after condensed water mixing, carries out deamination and concentrate ammoniacal liquor.
Compressor 5 can also be set in evaporator back end（That is MVR）, indirect steam is after the compression of compressor 5 again by again
The heat exchange of device 3 is boiled so as to provide thermal source for stripping rectifying column 2.
High ammonia nitrogen and high salt Sewage treatment ammonia concn after treated by the present method is higher than 15%, and tower reactor water outlet ammonia nitrogen concentration is low
In 15mg/L, this method can handle the waste water that ammonia nitrogen concentration is more than 1000mg/L.
Embodiment 1：
Single effect evaporation is illustrated with stripping rectifying column coupling processing high ammonia nitrogen and high salt wastewater application.
Waste water 1 is evaporated crystallization into single-action forced-circulation evaporation system, and crystal salt 6 is centrifuged discharge system,
Raw steam 2（About 0.4-0.5MPa）The heated waste water in evaporator, the indirect steam 3 being evaporated（About 0.3MPa）As stripping
The thermal source of distillation system enters reboiler, and condensed water 4 is weak aqua ammonia, into condensate water pot, is then pumped into stripping distillation system and enters
Row deamination, after multistage VLE, tower top obtains high-purity concentrated ammonia liquor 8 that concentration is higher than 18%, and tower reactor water outlet ammonia nitrogen concentration reaches
It is required that（It is, for example, less than 10 mg/L）, production or qualified discharge can be back to.
Embodiment 2：
Triple effect evaporator is illustrated with stripping rectifying column coupling processing high ammonia nitrogen and high salt wastewater application.
Waste water 1 is introduced into an effect falling film evaporator and is evaporated concentration, and a then effect water outlet 2 enters two effect forced circulations and steamed
Device is sent out, two effect water outlets 3 enter triple effect forced-circulation evaporators, and in the process, the ammonia overwhelming majority is evaporated and cold by steam
Condensate is dissolved, and waste water is concentrated step by step, until supersaturation crystallization, the discharge system after centrifuge separates of crystal salt 4.
Raw steam 5（About 0.7MPa）Into 1st effective evaporator shell side, the mixed steam 6 of the vapor being evaporated and ammonia steam
（About 0.5MPa）As the thermal source of 2nd effect evaporator, the condensed water 7 of 2nd effect evaporator enters triple effect evaporator shell side.Similarly, two
The indirect steam 8 of effect（About 0.4MPa）Enter triple effect evaporator shell side as triple effect thermal source, the weak aqua ammonia 9 for condensing to obtain enters dilute
Tank used for storing ammonia, the indirect steam 10 of triple effect（About 0.3MPa）Thermal source as stripping rectifying column enters reboiler, condensed cold
Condensate 11 enters weak aqua ammonia storage tank.
The weak aqua ammonia 12 that vapo(u)rization system obtains is pumped into stripping rectifying column and carries out recovery ammonia processing, after multistage VLE,
Tower top obtains the high concentrated ammonia liquor that concentration is higher than 15%, and tower reactor water outlet ammonia nitrogen concentration reaches requirement（It is, for example, less than 5 mg/L）, can return
For production or qualified discharge.
Embodiment 3
MVR illustrates with stripping rectifying column coupling processing high ammonia nitrogen and high salt wastewater application.
Waste water 1 enters forced-circulation evaporation system through being concentrated by evaporation, and crystal salt 6 is obtained after supersaturation, centrifuges heel row
Go out system.
Raw steam 2（About 0.3MPa）Vapo(u)rization system is heated, condensed condensate removal system.Vapo(u)rization system is produced
Raw indirect steam 3（About 0.1MPa）Into vapour compression machine, the compressed enthalpy of indirect steam 4 improves（About 0.3MPa）, so
Enter thermal source of the reboiler as stripping distillation system afterwards, the weak aqua ammonia 5 for condensing to obtain enters condensate water pot, and condensed water enters vapour
Carry distillation system and carry out deamination processing, after multistage VLE, tower top obtains the high concentrated ammonia liquor that concentration is higher than 22%, and tower reactor goes out
Water ammonia nitrogen concentration reaches requirement（It is, for example, less than 8mg/L）, production or qualified discharge can be back to.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although reference
The present invention is described in detail for preferred embodiment, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among the scope of the claims of the present invention.
Claims (10)
- A kind of 1. recycling processing method of high ammonia nitrogen and high salt waste water, it is characterised in that stripping rectifying is coupled with evaporation, Using indirect steam caused by evaporation thermal source is provided for stripping rectifying.
- 2. processing method as claimed in claim 1, it is characterised in that the waste water be evaporated to obtain first steam containing ammonia and Crystalline salt, the steam containing ammonia are exchanged heat so as to provide thermal source for stripping rectifying column by reboiler, and the crystalline salt is after centrifugation Recovery.
- 3. processing method as claimed in claim 2, it is characterised in that the condensate liquid that steam containing ammonia obtains after reboiler exchanges heat For weak aqua ammonia.
- 4. processing method as claimed in claim 3, it is characterised in that water inlet of the weak aqua ammonia as stripping rectifying column, warp Multi-stage gas-liquid balances, and tower top obtains concentrated ammonia liquor, and tower reactor water outlet ammonia nitrogen is up to standard.
- 5. processing method as claimed in claim 1 or 2, it is characterised in that it is described evaporation as needed be set to single effect evaporation or Person's multiple-effect evaporation.
- 6. processing method as claimed in claim 5, it is characterised in that when using single effect evaporation, two caused by single effect evaporation Thermal source of the secondary steam directly as stripping rectifying column.
- 7. processing method as claimed in claim 5, it is characterised in that when using multiple-effect evaporation, made with the raw steam of the first effect For original heat source, waste water carries out stepped evaporation, and the indirect steam of end effect evaporation is as the thermal source for stripping rectifying column.
- 8. processing method as claimed in claim 7, it is characterised in that mixed with caused condensed water during waste water stepped evaporation Close water inlet of the liquid as stripping rectifying column.
- 9. the processing method as described in any claim in claim 1-8, it is characterised in that indirect steam can also be passed through first Exchanged heat again by reboiler so as to provide thermal source for stripping rectifying column after compressor compresses.
- 10. processing method as claimed in claim 9, it is characterised in that methods described processing influent ammonium concentration is more than 1000mg/L, stripping rectifying recovery ammonia concn are more than 15%, and tower reactor water outlet ammonia nitrogen concentration is less than 15mg/L.
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| CN201710799817.3A CN107487802B (en) | 2017-09-07 | 2017-09-07 | Resourceful treatment method for high-ammonia-nitrogen high-salt wastewater |
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| CN201710799817.3A CN107487802B (en) | 2017-09-07 | 2017-09-07 | Resourceful treatment method for high-ammonia-nitrogen high-salt wastewater |
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| CN107487802B CN107487802B (en) | 2021-04-02 |
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Cited By (2)
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| CN108358258A (en) * | 2018-02-26 | 2018-08-03 | 天华化工机械及自动化研究设计院有限公司 | A kind of MVR deaminations divide salt integrated technique |
| CN110697959A (en) * | 2019-10-15 | 2020-01-17 | 齐鲁工业大学 | Resource recycling method for high-salt high-ammonia nitrogen wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358258A (en) * | 2018-02-26 | 2018-08-03 | 天华化工机械及自动化研究设计院有限公司 | A kind of MVR deaminations divide salt integrated technique |
| CN108358258B (en) * | 2018-02-26 | 2020-11-17 | 天华化工机械及自动化研究设计院有限公司 | MVR deamination and salt separation integrated process method |
| CN110697959A (en) * | 2019-10-15 | 2020-01-17 | 齐鲁工业大学 | Resource recycling method for high-salt high-ammonia nitrogen wastewater |
| CN110697959B (en) * | 2019-10-15 | 2022-02-25 | 齐鲁工业大学 | Resource recycling method for high-salt high-ammonia nitrogen wastewater |
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| CN107487802B (en) | 2021-04-02 |
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