CN107298448A - A kind of method that ammonia is reclaimed from ammonia nitrogen waste water - Google Patents
A kind of method that ammonia is reclaimed from ammonia nitrogen waste water Download PDFInfo
- Publication number
- CN107298448A CN107298448A CN201710591166.9A CN201710591166A CN107298448A CN 107298448 A CN107298448 A CN 107298448A CN 201710591166 A CN201710591166 A CN 201710591166A CN 107298448 A CN107298448 A CN 107298448A
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- China
- Prior art keywords
- ammonia
- tower
- tower top
- reboiler
- reclaimed
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/10—Separation of ammonia from ammonia liquors, e.g. gas liquors
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a kind of method that ammonia is reclaimed from ammonia nitrogen waste water, rectifying tower top effusion ammonia compression is superheated steam using mechanical compressor by this method, hence into the reboiler condensation release heat of transformation, tower bottom of rectifying tower is set partly to be vaporized after entering the heated liquid of reboiler, rise and return to tower reactor, thermal source is provided for distillation system, the ammoniacal liquor condensate liquid of final reboiler discharge is partly refluxed to rectifying column tower top, part enters condensate cooler, realize that ammoniacal liquor is reclaimed, the discharged wastewater met the national standard of preheater discharge；The inventive method realizes effective utilization of tower top ammonia steam, and without additional steam consumption in addition to first start-up, operating cost is low, and circulating cooling water consumption is few, equipment is few, invests small, system operatio is stable, ammonia concn >=15% is finally reclaimed, with good market prospects.
Description
Technical field
The invention belongs to field of waste water treatment, more particularly to a kind of method that ammonia is reclaimed from ammonia nitrogen waste water.
Background technology
It is the mature technology that generally uses using rectifying deamination is stripped, and traditional distillation system is generally carried by reboiler
Supplying heat source, i.e., set reboiler in tower bottom of rectifying tower, steam be passed through into reboiler, and the heat of transformation for condensing release using steam will
Tower bottoms is further vaporized, so that tower reactor produces the steam risen.
But in actual production, the problem of this tower reactor mode of heating has notable is such as：When steam pressure is fluctuated,
Temperature in tower can not be ensured, the stabilization of pressure then influences the normal operating of tower；In addition, also there is large steam consumption, it is cold
The deficiency such as solidifying shipwreck reuse, circulation water consumption are big, investment more than equipment is big.
Therefore, inventor thinks have well for the further improvement of distillation technology and the exploitation of recovery ammonia new technology
Market prospects.
The content of the invention
Fluctuated greatly by steam pressure to solve traditional distillation technology, it is impossible to ensure that temperature and the stabilization of pressure are asked in tower
Also there is large steam consumption, cooling shipwreck while topic and reclaim the deficiencies such as investment more than the circulation big equipment of water consumption is big, the present invention is carried
Go out a kind of new method that ammonia is reclaimed from ammonia nitrogen waste water.
For up to above-mentioned purpose, the present invention is adopted the following technical scheme that：
A kind of method that ammonia is reclaimed from ammonia nitrogen waste water, comprises the following steps：
Step（1）：Enter rectifying column after the preheated device preheating of mixed liquor；
Step（2）：To step（1）Saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top temperature is raised
Escaped to ammonia from tower top；
Step（3）：By step（2）The steam of tower top effusion, which is introduced, enters reboiler after mechanical compressor compression, condensation release phase
Heating, vaporizes the heated liquid that tower reactor enters reboiler, rises, return to tower reactor；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed.
Step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly enters
Enter condensate cooler and further condense cooling, reclaim ammoniacal liquor.
Step（7）：The discharged wastewater met the national standard come out from preheater.
Ammonia nitrogen in waste water content≤15mg/L.
Step（6）：Ammonia concn >=15% of recovery.
Step（2）In the saturated vapour pressure that is passed through be 0.2 ~ 0.8Mpa, tower top temperature rises to 80 DEG C of ＞.
Step（2）In the saturated vapour pressure that is passed through be 0.4 ~ 0.5Mpa, tower top temperature rises to 80 ~ 90 DEG C.
Step（3）Ammonia pressure is 0.4 ~ 2.0MPa after mechanical compressor compression, and temperature is 100 ~ 200 DEG C.
Ammonia pressure is 0.4 ~ 1.0Mpa, and temperature is 100 ~ 150 DEG C.
As optimal technical scheme, method of the invention comprises the following steps：
Step（1）：Take 10m3The above-mentioned solution of/h, enters in rectifying column after preheated device preheating；
Step（2）：To step（1）0.4Mpa saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top is treated
When temperature rises to 80 DEG C of ＞, ammonia is escaped from tower top；
Step（3）：By step（2）The ammonia of tower top effusion enters reboiler after introducing mechanical compressor compression, and ammonia condensation is released
The heat of transformation is put, is partly vaporized after entering the heated liquid of reboiler from tower reactor, tower reactor is returned as upflowing vapor；Ammonia after compression
Atmospheric pressure is 0.4~1.0MPa, and temperature is 100~150 DEG C.
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly into cold
Solidifying cooler further condenses cooling, reclaims ammoniacal liquor, ammonia concn >=15%；
Step（6）：The discharged wastewater met the national standard come out from preheater, ammonia nitrogen in waste water content≤15mg/L.
Compared with conventional art, the present invention has the advantages that：
1st, the invention discloses a kind of new method that ammonia is reclaimed from ammonia nitrogen waste water, this method is by setting mechanical compressor, phase
Than traditional stripping rectification method, there is provided realize tower top ammonia while a kind of new paragon of acquisition thermal source for no steam consumption
Effective utilization of steam；
2nd, the inventive method makes full use of ammonia, and without additional steam consumption in addition to first start-up, operating cost is low；
3rd, the inventive method except circulating cooling water consumption it is few, equipment is few, invests small, system operatio is stable outer, reclaims ammoniacal liquor dense
Degree >=15%.
Brief description of the drawings
Fig. 1 is the process chart of the recovery method of the present invention.
Embodiment
For the present invention is better described, technical scheme is readily appreciated, below to the present invention further specifically
It is bright.But following embodiments is only the simple example of the present invention, the scope of the present invention is not represented or limits,
Protection scope of the present invention is defined by claims.
As shown in figure 1, a kind of method that ammoniacal liquor is reclaimed from ammonia nitrogen waste water, ammonia nitrogen waste water enters after being preheated by preheater
Distillation system, saturated vapor is passed through into tower reactor reboiler（0.4Mpa）, tower reactor is heated, treats that tower top temperature rises to 80 DEG C of ＞
When, ammonia escapes from tower top and is introduced into mechanical compressor compression, pressure increase（0.4~1Mpa）, as superheated steam (100 ~
150 DEG C), into reboiler；
In reboiler, the superheated steam condensation release heat of transformation enters part after the heated liquid of reboiler from tower bottom of rectifying tower
Vaporization, tower reactor is returned as upflowing vapor；The ammoniacal liquor condensate liquid discharged from reboiler is partly refluxed to rectifying column tower top, partly enters
Enter condensate cooler and further condense cooling, for reclaiming ammoniacal liquor, ammonia concn >=15%;
The direct qualified discharge of waste water come out from preheater, ammonia-nitrogen content≤15mg/L.
Embodiment 1
The ammonia nitrogen waste water of certain enterprise, ammonia-nitrogen content 0.5g/L.
Step（1）：Take 10m3The above-mentioned solution of/h, enters in rectifying column after preheated device preheating；
Step（2）：To step（1）0.2Mpa saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top is treated
When temperature rises to 80 DEG C of ＞, ammonia is escaped from tower top；
Step（3）：By step（2）The ammonia of tower top effusion enters reboiler after introducing mechanical compressor compression, and ammonia condensation is released
The heat of transformation is put, is partly vaporized after entering the heated liquid of reboiler from tower reactor, tower reactor is returned as upflowing vapor；Ammonia after compression
Atmospheric pressure is 0.4MPa, and temperature is 100 DEG C；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed；
Step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly into cold
Solidifying cooler further condenses cooling, reclaims ammoniacal liquor, ammonia concn >=15%；
Step（7）：The direct qualified discharge of waste water come out from preheater.
Embodiment 2
The ammonia nitrogen waste water of certain enterprise, ammonia-nitrogen content 15g/L.
Step（1）：Take 10m3The above-mentioned solution of/h, enters in rectifying column after preheated device preheating；
Step（2）：To step（1）0.5Mpa saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top is treated
When temperature rises to 85 DEG C, ammonia is escaped from tower top；
Step（3）：By step（2）The ammonia of tower top effusion, which is introduced, enters reboiler after mechanical compressor compression, the solidifying release of ammonia
The heat of transformation, partly vaporizes after entering the heated liquid of reboiler from tower reactor, tower reactor is returned as upflowing vapor；Ammonia after compression
Pressure is 0.6MPa, and temperature is 120 DEG C；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed；
Step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly into cold
Solidifying cooler further condenses cooling, reclaims ammoniacal liquor, ammonia concn >=15%；
Step（7）：The direct qualified discharge of waste water come out from preheater.
Embodiment 3
The ammonia nitrogen waste water of certain enterprise, ammonia nitrogen concentration is 30g/L.
Step（1）：Take 10m3The above-mentioned solution of/h, enters in rectifying column after preheated device preheating；
Step（2）：To step（1）0.4Mpa saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top is treated
When temperature rises to 90 DEG C, ammonia is escaped from tower top；
Step（3）：By step（2）The ammonia of tower top effusion enters reboiler after introducing mechanical compressor compression, and ammonia condensation is released
The heat of transformation is put, is partly vaporized after entering the heated liquid of reboiler from tower reactor, tower reactor is returned as upflowing vapor；Ammonia after compression
Atmospheric pressure is 1.0MPa, and temperature is 150 DEG C；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed；
Step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly into cold
Solidifying cooler further condenses cooling, reclaims ammoniacal liquor, ammonia concn >=15%；
Step（7）：The direct qualified discharge of waste water come out from preheater.
Embodiment 4
The ammonia nitrogen waste water of certain enterprise, ammonia-nitrogen content is 60g/L.
Step（1）：Take 10m3The above-mentioned solution of/h, enters in rectifying column after preheated device preheating
Step（2）：To step（1）0.8Mpa saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top is treated
When temperature rises to 90 DEG C, ammonia is escaped from tower top；
Step（3）：By step（2）The ammonia of tower top effusion enters reboiler after introducing mechanical compressor compression, and ammonia condensation is released
The heat of transformation is put, is partly vaporized after entering the heated liquid of reboiler from tower reactor, tower reactor is returned as upflowing vapor；Ammonia after compression
Atmospheric pressure is 1.5MPa, and temperature is 200 DEG C；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed；
Step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid and be partly refluxed to step（1）Rectifying column tower top, partly into cold
Solidifying cooler further condenses cooling, reclaims ammoniacal liquor, ammonia concn >=15%；
Step（7）：The direct qualified discharge of waste water come out from preheater.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (9)
1. a kind of method that ammonia is reclaimed from ammonia nitrogen waste water, it is characterised in that comprise the following steps：
Step（1）：Enter rectifying column after the preheated device preheating of mixed liquor；
Step（2）：To step（1）Saturated vapor is passed through in tower bottom of rectifying tower reboiler, tower reactor is heated, tower top temperature is raised
Escaped to ammonia from tower top；
Step（3）：By step（2）The ammonia of tower top effusion, which is introduced, enters reboiler after mechanical compressor compression, condensation release phase
Heating, vaporizes the heated liquid that tower reactor enters reboiler, rises, return to tower reactor；
Step（4）：Tower reactor water outlet enters step（1）Preheater is heated to water inlet；
Step（5）：Ammoniacal liquor is reclaimed.
2. the method as described in claim 1, it is characterised in that step（6）：Step（3）Condense obtained ammoniacal liquor condensate liquid portion
Divide and be back to step（1）Rectifying column tower top, partly further condenses cooling into condensate cooler, reclaims ammoniacal liquor.
3. method as claimed in claim 1 or 2, it is characterised in that step（7）：The discharged wastewater met the national standard come out from preheater.
4. method as claimed in claim 3, it is characterised in that ammonia nitrogen in waste water content≤15mg/L.
5. method as claimed in claim 2, it is characterised in that step（6）：Ammonia concn >=15% of recovery.
6. method as claimed in claim 5, it is characterised in that step（2）In the saturated vapour pressure that is passed through for 0.2 ~
0.8Mpa, tower top temperature rises to 80 DEG C of ＞.
7. method as claimed in claim 6, it is characterised in that step（2）In the saturated vapour pressure that is passed through for 0.4 ~
0.5Mpa, tower top temperature rises to 80 ~ 90 DEG C.
8. method as claimed in claim 7, it is characterised in that step（3）Mechanical compressor compression after ammonia pressure be 0.4 ~
2.0MPa, temperature is 100 ~ 200 DEG C.
9. method as claimed in claim 8, it is characterised in that ammonia pressure is 0.4 ~ 1.0Mpa, temperature is 100 ~ 150 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710591166.9A CN107298448A (en) | 2017-07-19 | 2017-07-19 | A kind of method that ammonia is reclaimed from ammonia nitrogen waste water |
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| CN201710591166.9A CN107298448A (en) | 2017-07-19 | 2017-07-19 | A kind of method that ammonia is reclaimed from ammonia nitrogen waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467076A (en) * | 2018-06-01 | 2018-08-31 | 烟台国邦化工机械科技有限公司 | Based on the process and device for strengthening resolving resourceization processing waste water containing low-boiling-point substance |
| CN110902743A (en) * | 2019-12-09 | 2020-03-24 | 山东驰越化工有限公司 | Waste ammonia water treatment system and device in decamethylene diamine production |
| CN112875783A (en) * | 2021-04-14 | 2021-06-01 | 北京中科康仑环境科技研究院有限公司 | System and method for treating wastewater containing volatile substances |
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| CN203602435U (en) * | 2013-12-05 | 2014-05-21 | 赖桂艳 | Resourceful treatment process system for extracting high-concentration ammonia water from ammonia-nitrogen wastewater |
| CN203648120U (en) * | 2013-12-23 | 2014-06-18 | 湖北汇达科技发展有限公司 | Alkali-hydrolyzable ammonia recovery and distillation device |
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| CN106379952A (en) * | 2015-08-07 | 2017-02-08 | 王树岩 | Apparatus and process for treating ammonia nitrogen wastewater and recycling ammonia |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103964528A (en) * | 2013-01-28 | 2014-08-06 | 北京蓝天欣禾科技有限公司 | Heat pump rectification steam stripping deamination method |
| CN103408086A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467076A (en) * | 2018-06-01 | 2018-08-31 | 烟台国邦化工机械科技有限公司 | Based on the process and device for strengthening resolving resourceization processing waste water containing low-boiling-point substance |
| CN110902743A (en) * | 2019-12-09 | 2020-03-24 | 山东驰越化工有限公司 | Waste ammonia water treatment system and device in decamethylene diamine production |
| CN112875783A (en) * | 2021-04-14 | 2021-06-01 | 北京中科康仑环境科技研究院有限公司 | System and method for treating wastewater containing volatile substances |
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Application publication date: 20171027 |