CN104803531B - Sym-closene mother liquor waste water processing method - Google Patents
Sym-closene mother liquor waste water processing method Download PDFInfo
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- CN104803531B CN104803531B CN201510172577.5A CN201510172577A CN104803531B CN 104803531 B CN104803531 B CN 104803531B CN 201510172577 A CN201510172577 A CN 201510172577A CN 104803531 B CN104803531 B CN 104803531B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 30
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229950009390 symclosene Drugs 0.000 title claims abstract description 16
- 239000012452 mother liquor Substances 0.000 title claims abstract description 14
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 60
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims abstract description 44
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 40
- 238000002425 crystallisation Methods 0.000 claims abstract description 33
- 230000008025 crystallization Effects 0.000 claims abstract description 33
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 30
- 238000006298 dechlorination reaction Methods 0.000 claims abstract description 28
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000460 chlorine Substances 0.000 claims abstract description 27
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 27
- 150000003839 salts Chemical class 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims description 25
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000004457 water analysis Methods 0.000 description 10
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical class [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Abstract
The invention belongs to technical field of waste water processing, disclose a kind of sym-closene mother liquor waste water processing method.It is mainly characterized in that and first waste water is adjusted pond regulation, subsequently into entering chlorinolysis groove, hydrochloric acid is added in chlorinolysis groove, remove hypochlorite, water after processing again enters dechlorination groove, the chlorine produced enters denitrogenates pond in the 3rd step, adds a small amount of sodium sulfite, remove unnecessary hypochlorite in dechlorination groove；Then add alkali and separate out ultrapas cyanurate, the ultrapas cyanurate separated out reclaims, chlorine it is passed through in denitrogenating pond, ammonia and excessive chlorine react generation nitrogen and discharge, it is subsequently adding sodium sulfite, unnecessary hypochlorite is removed, finally by evaporative crystallization, isolated crude salt is collected, the condensed water qualified discharge steamed.Not only cyanuric acid is reclaimed, and waste water processes, and energy consumption is low, salt purification recovery is thorough, equipment for reclaiming small investment, the danger that reduces are given up and measured.
Description
Technical field
The invention belongs to chemical wastewater treatment technical field, concretely relate to sym-closene mother liquor waste water processing method.
Background technology
In sym-closene mother liquor waste water, COD content is up to more than 6580mg/L, ammonia nitrogen about 2000-4000mg/L, pH is about 3-4, TDS content is at more than 100000-120000mg/L, simultaneously possibly together with tripolycyanamide, cyanuric acid, sodium chloride, sodium hypochlorite, free chlorine, sym-closene, dichlord isocyanurice acid, a symclosene etc..Pollutant levels are high, salt content concentration is high, and complicated component, is the most complicated in sodium wastewater from chemical industry processed, the most intractable waste water.
At present, after using the conventional high level oxidation technologies such as iron-carbon micro-electrolysis, Fenton oxidation, ozone oxidation to process, COD value is difficult to reach " sewage row's municipal sewage system water standard " (CJ3082-1999) discharge standard.Process even across multistage advanced oxidation, below 500mg/L can be dropped to, but operating cost and investment are huge, are that enterprise is difficult to accept.Additionally, salt content is high, and common embrane method can not use, and uses video disc reverse-osmosis treated, investment and operating cost are the highest, use multiple-effect evaporation crystallization investment moderate, but operating cost is high, uses MVR vaporizer and forced-circulation evaporator, operating cost reduces, but investing higher, the sodium salt of above evaporator evaporation crystallization simultaneously is impure higher, it is impossible to reuse.
In sum, sym-closene mother liquor waste water treatment technology main difficulty is, pollutant levels are high, salt content concentration is high, complicated component, it is impossible to use common process, so, how to remove COD, purifying and can use salt content, reclaim salt, reduction investment and operating cost are emphasis and the difficult points of this type of water process.
Summary of the invention
Present invention solves the technical problem that just be to provide a kind of waste water process that energy consumption is low, salt purify reclaim thoroughly, equipment for reclaiming small investment, the useless amount of the danger that reduces, the sym-closene mother liquor waste water processing method of energy-conserving and environment-protective of being conducive to.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is: the method comprises the following steps:
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, entering chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 2-4 in chlorinolysis groove, the chlorine of generation is collected standby, and the water after processing enters dechlorination groove, adds a small amount of sodium sulfite, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, entering sedimentation tank, add alkali in sedimentation tank, modulation pH value is 6.5-7.5, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, and the ultrapas cyanurate pumped of precipitation are reclaimed；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, and the isolated crude salt of evaporative crystallization is collected, the condensed water qualified discharge steamed.
Its additional technical feature is:
In the step enter chlorinolysis groove in the described first step, removing hypochlorite, pH value is adjusted to 2.8-3；At described second step, reclaiming in the step of cyanuric acid, modulation pH value is 6.8-7.1.
The sym-closene mother liquor waste water processing method that the present invention provides, has the advantage that
First waste water is adjusted pond regulation, subsequently into entering chlorinolysis groove, in chlorinolysis groove, adds hydrochloric acid, removing hypochlorite, then the water after processing enters dechlorination groove, the chlorine of generation enters denitrogenates pond in the 3rd step, in dechlorination groove, add a small amount of sodium sulfite, remove unnecessary hypochlorite；Then add alkali and separate out ultrapas cyanurate, the ultrapas cyanurate separated out reclaims, being passed through chlorine in denitrogenating pond, ammonia and excessive chlorine react generation nitrogen and discharge, and are subsequently adding sodium sulfite, unnecessary hypochlorite is removed, finally by evaporative crystallization, isolated crude salt is collected, the condensed water qualified discharge steamed, not only cyanuric acid is reclaimed, and waste water processes, and energy consumption is low, salt purification recovery is thorough, equipment for reclaiming small investment, the danger that reduces are given up and measured.
In the step enter chlorinolysis groove in the described first step, removing hypochlorite, pH value is adjusted to 2.8-3；At described second step, reclaiming in the step of cyanuric acid, modulation pH value is 6.8-7.1, and so, hypochlorite is removed more thorough, and in discharge water, harmful substance is less.
Detailed description of the invention
Below in conjunction with embodiment, sym-closene mother liquor waste water processing method proposed by the invention is described further.
The sym-closene mother liquor waste water processing method that the present invention proposes comprises the following steps:
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, entering chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 2-4 in chlorinolysis groove, the chlorine of generation is collected standby, and the water after processing enters dechlorination groove, adds a small amount of sodium sulfite, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, entering sedimentation tank, add alkali in sedimentation tank, modulation pH value is 6.5-7.5, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, and the ultrapas cyanurate pumped of precipitation are reclaimed；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, and the isolated crude salt of evaporative crystallization is collected, the condensed water qualified discharge steamed.
Employing said method process sym-closene mother liquor waste water, not only reclaims cyanuric acid, and waste water processes, and energy consumption is low, salt purification recovery is thorough, equipment for reclaiming small investment, the danger that reduces are given up and measured.
As the further improvement of patent of the present invention, in the step enter chlorinolysis groove in the described first step, removing hypochlorite, pH value is adjusted to 2.8-3；At described second step, reclaiming in the step of cyanuric acid, modulation pH value is 6.8-7.1, and so, hypochlorite is removed more thorough, and in discharge water, harmful substance is less.
Embodiment 1
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, entering chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 4 in chlorinolysis groove, the chlorine of generation is collected standby, and the water after processing enters dechlorination groove, adds a small amount of sodium sulfite, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, entering sedimentation tank, add alkali in sedimentation tank, modulation pH value is 7.5, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, and the ultrapas cyanurate pumped of precipitation are reclaimed；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, and the isolated crude salt of evaporative crystallization is collected, the condensed water qualified discharge steamed.
The water analysis data in the present embodiment 1 different disposal stage are as shown in table 1.
The water analysis data in table 1 different disposal stage.
| The processing stage of each | PH value | COD/(mg/L) | Ammonia nitrogen/(mg/L) | Salt content/(mg/L) |
| Chlorinolysis groove | 4 | 6580 | 3600 | 110000 |
| Sedimentation tank | 7.0 | 480 | 1300 | 110000 |
| Denitrogenate pond | 7.0 | 480 | 25 | 110000 |
| Evaporative crystallization water outlet | 7.0 | 480 | 25 | 7 |
Embodiment 2
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, enter chlorinolysis groove, in chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 4, amount of chlorine 14500mg/L, the chlorine of generation is collected standby, water after processing enters dechlorination groove, adds sodium sulfite 5mg/L, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, enter sedimentation tank, alkali is added in sedimentation tank, modulation pH value is 6.5, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, the ultrapas cyanurate pumped separated out being reclaimed, sedimentation tank water outlet COD is 410mg/L；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges, and remains ammonia 23mg/L；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, evaporative crystallization isolated crude salt solid content 82%, and crude salt is collected, the condensed water qualified discharge steamed.
The water analysis data in the present embodiment 2 different disposal stage are as shown in table 2.
The water analysis data in table 2 different disposal stage.
| The processing stage of each | PH value | COD/(mg/L) | Ammonia nitrogen/(mg/L) | Salt content/(mg/L) |
| Chlorinolysis groove | 3.5 | 5140 | 3200 | 93850 |
| Sedimentation tank | 6.5 | 410 | 1200 | 93850 |
| Denitrogenate pond | 6.5 | 410 | 23 | 93850 |
| Evaporative crystallization water outlet | 7.0 | 410 | 23 | 5 |
Embodiment 3
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, enter chlorinolysis groove, in chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 2.8, amount of chlorine 12670mg/L, the chlorine of generation is collected standby, water after processing enters dechlorination groove, adds sodium sulfite 4mg/L, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, enter sedimentation tank, alkali is added in sedimentation tank, modulation pH value is 6.8, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, the ultrapas cyanurate pumped separated out being reclaimed, sedimentation tank water outlet COD is 330mg/L；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges, and remains ammonia 18mg/L；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, evaporative crystallization isolated crude salt solid content 81%, and crude salt is collected, the condensed water qualified discharge steamed.
The water analysis data in the present embodiment 3 different disposal stage are as shown in table 3.
The water analysis data in table 3 different disposal stage.
| The processing stage of each | PH value | COD/(mg/L) | Ammonia nitrogen/(mg/L) | Salt content/(mg/L) |
| Chlorinolysis groove | 4 | 5140 | 2600 | 93850 |
| Sedimentation tank | 7.0 | 330 | 1130 | 93850 |
| Denitrogenate pond | 7.0 | 330 | 18 | 93850 |
| Evaporative crystallization water outlet | 7.0 | 330 | 18 | 5 |
Embodiment 4
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, enter chlorinolysis groove, in chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 3, amount of chlorine 13870mg/L, the chlorine of generation is collected standby, water after processing enters dechlorination groove, adds sodium sulfite 6mg/L, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, enter sedimentation tank, alkali is added in sedimentation tank, modulation pH value is 7.1, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, the ultrapas cyanurate pumped separated out being reclaimed, sedimentation tank water outlet COD is 390mg/L；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges, and remains ammonia 27mg/L；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, evaporative crystallization isolated crude salt solid content 82%, and crude salt is collected, the condensed water qualified discharge steamed.
The water analysis data in the present embodiment 4 different disposal stage are as shown in table 4.
The water analysis data in table 4 different disposal stage.
| The processing stage of each | PH value | COD/(mg/L) | Ammonia nitrogen/(mg/L) | Salt content/(mg/L) |
| Chlorinolysis groove | 3.8 | 5720 | 3090 | 112500 |
| Sedimentation tank | 6.5 | 390 | 1260 | 112500 |
| Denitrogenate pond | 6.5 | 390 | 27 | 112500 |
| Evaporative crystallization water outlet | 7.0 | 390 | 27 | 9 |
Embodiment 5
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, enter chlorinolysis groove, in chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 2.9, amount of chlorine 13870mg/L, the chlorine of generation is collected standby, water after processing enters dechlorination groove, adds sodium sulfite 5mg/L, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, enter sedimentation tank, alkali is added in sedimentation tank, modulation pH value is 7.0, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, the ultrapas cyanurate pumped separated out being reclaimed, sedimentation tank water outlet COD is 390mg/L；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges, and remains ammonia 22mg/L；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, evaporative crystallization isolated crude salt solid content 82%, and crude salt is collected, the condensed water qualified discharge steamed.
The water analysis data in the present embodiment 4 different disposal stage are as shown in table 4.
The water analysis data in table 4 different disposal stage.
| The processing stage of each | PH value | COD/(mg/L) | Ammonia nitrogen/(mg/L) | Salt content/(mg/L) |
| Chlorinolysis groove | 3.8 | 5720 | 3090 | 112500 |
| Sedimentation tank | 7.0 | 390 | 1260 | 112500 |
| Denitrogenate pond | 7.0 | 390 | 22 | 112500 |
| Evaporative crystallization water outlet | 7.0 | 390 | 22 | 9 |
Protection scope of the present invention is not limited solely to above-described embodiment, as long as structure is identical with sym-closene mother liquor waste water processing method structure of the present invention, just falls in the scope of protection of the invention.
Claims (2)
1. sym-closene mother liquor waste water processing method, it is characterised in that: this technique comprises the following steps:
The first step, enters chlorinolysis groove, removes hypochlorite
After waste water is adjusted pond, entering chlorinolysis groove, add hydrochloric acid, pH value is adjusted to 2-4 in chlorinolysis groove, the chlorine of generation is collected standby, and the water after processing enters dechlorination groove, adds a small amount of sodium sulfite, remove unnecessary hypochlorite in dechlorination groove；
Second step, reclaims cyanuric acid
To the water after dechlorination processes except hypochlorite, entering sedimentation tank, add alkali in sedimentation tank, modulation pH value is 6.5-7.5, tripolycyanamide and cyanuric acid reaction in water generate precipitate ultrapas cyanurate and separate out, and the ultrapas cyanurate pumped of precipitation are reclaimed；
3rd step, except ammonia treatment
The water that upper step processed enters denitrogenates pond, and is passed through by the chlorine that the first step produces and denitrogenates in pond, and ammonia is directly oxidized to nitrogen and discharges；
4th step, chlorine residue removes
Intermediate pool will be imported except the water after ammonia, and in intermediate pool, add sodium sulfite, unnecessary hypochlorite is removed；
5th step, evaporative crystallization
Water after chlorine residue being removed is evaporated crystallization treatment, and the isolated crude salt of evaporative crystallization is collected, the condensed water qualified discharge steamed.
Sym-closene mother liquor waste water processing method the most according to claim 1, it is characterised in that: in the step enter chlorinolysis groove in the described first step, removing hypochlorite, pH value is adjusted to 2.8-3；At described second step, reclaiming in the step of cyanuric acid, modulation pH value is 6.8-7.1.
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| CN112028090A (en) * | 2020-09-15 | 2020-12-04 | 诸城泰盛化工股份有限公司 | Deep treatment system and process for chlor-alkali recovered salt |
| CN112723591B (en) * | 2020-12-10 | 2023-04-07 | 西安航天动力试验技术研究所 | PH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent and method |
| CN113200643A (en) * | 2021-04-13 | 2021-08-03 | 子赫科技湖北有限公司 | Process for realizing near-zero discharge of trichloroisocyanuric acid production wastewater |
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| CN103864099B (en) * | 2014-01-26 | 2015-08-19 | 菏泽华意化工有限公司 | The method of comprehensive utilization of a kind of cyanuric acid industrial gaseous waste and waste water |
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