CN108793564A - The synthetical recovery processing method of waste water from dyestuff middle and high concentration cyanide and sodium sulfite - Google Patents
The synthetical recovery processing method of waste water from dyestuff middle and high concentration cyanide and sodium sulfite Download PDFInfo
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- CN108793564A CN108793564A CN201810775420.5A CN201810775420A CN108793564A CN 108793564 A CN108793564 A CN 108793564A CN 201810775420 A CN201810775420 A CN 201810775420A CN 108793564 A CN108793564 A CN 108793564A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- 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
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Abstract
The present invention relates to the synthetical recovery processing methods of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite, belong to field of environment protection.Waste water from dyestuff is pumped into heater and then gravity flow enters in stripping tower one successively, pH value is adjusted and is passed through air into each stripping tower into stripping tower two, stripping tower three, stripping is carried out to waste water from dyestuff, recycles cyanide and sodium sulfite in waste water；Waste water from dyestuff is reserved for one's own use into buffer reservoir；Stripping is carried out to stripping tower using wind turbine, the hydrogen cyanide gas and sulfur dioxide gas gone out to stripping using absorption tower one and absorption tower two is absorbed, and absorbs the absorbing liquid after nearly saturation as raw material recycling；Press filtration after neutralization.The present invention makees to reduce the toxicity of waste water from dyestuff, reaches industrial park sewage treatment plant and enters factory's requirement, lay a good foundation for the existence and sustainable development of enterprise, solves great environmental issue for chemical industry, while having recycled utility, turn waste into wealth.
Description
Technical field
The invention belongs to field of environment protection more particularly to chemical industry utility synthetical recovery processing methods, and in particular to a kind of
The synthetical recovery processing method of waste water from dyestuff middle and high concentration cyanide and sodium sulfite.
Background technology
In chemical industry, need to add cyaniding during the processing of disperse dyes, solvent dye and dyestuff intermediate
Sodium inevitably contains high concentration cyanide come the waste water from dyestuff for improving the performance of dyestuff, therefore generating, and sodium sulfite is also
A kind of a kind of raw materials for production of dye industry, the usually inferior sulfate radical containing high concentration simultaneously in waste water from dyestuff, the wastewater toxicity
Greatly, Odor stimulation is strong, and intractability is high, and current treatment technology is mainly the oxidation medicine such as sodium thiosulfate, sodium pyrosulfite
Agent medicament oxidizing process, the processing method poor processing effect, technic index are unstable.
Invention content
The present invention provides a kind of synthetical recovery processing method of waste water from dyestuff middle and high concentration cyanide and sodium sulfite, with solution
Certainly effect present in dye wastewater treatment is poor, the unstable problem of technic index.
The technical solution adopted by the present invention is that including the following steps：
(1) waste water from dyestuff is pumped into heater and then gravity flow enters in stripping tower one successively；
(2) concentrated sulfuric acid is added in stripping tower one, it is 1~1.5 to adjust pH value；
(3) flow automatically successively into stripping tower two, stripping tower three from stripping tower one after；
(4) it is passed through air into stripping tower one, stripping tower two, stripping tower three, stripping is carried out to waste water from dyestuff, recycles waste water
In cyanide and sodium sulfite；
(5) waste water from dyestuff is reserved for one's own use into buffer reservoir in stripping tower three；
(6) wind turbine is used to carry out stripping to stripping tower one, stripping tower two, stripping tower three, using absorption tower one and absorption tower
The hydrogen cyanide gas and sulfur dioxide gas that two pairs of strippings go out absorb；
(7) absorbing liquid in absorption tower one, absorption tower two is regularly replaced, absorbs the absorbing liquid after nearly saturation as raw material weight
It is multiple to utilize；
(8) waste water from dyestuff is pumped into neutralization chamber one, neutralization chamber two in buffer reservoir；
(9) waste water from dyestuff after neutralizing is pumped into advanced treatment reactor one, advanced treatment reactor two, advanced treating reaction
In device three, then press filtration；
(10) pressing filtering liquid is discharged into industrial park sewage treatment plant pipe network, and filter-press residues are disposed according to related code requirement.
In step (1) of the present invention, a concentration of 9000mg/L~12000mg/ of total cyanide in pending waste water from dyestuff
L, a concentration of 5000mg/L~7000mg/L of inferior sulfate radical, waste water from dyestuff is by being heated to 29 DEG C~31 DEG C after heater, stripping
The residence time of tower one is 2h.
In step (3) of the present invention, stripping tower two, stripping tower three residence time be respectively 2h.
In step (4) of the present invention, air intake is that stripping tower one, stripping tower two, stripping tower three are effective per hour
450 times of volume.
It is 0.5h in the residence time of buffer reservoir in step (5) of the present invention.
In step (6) of the present invention, stripping air passes sequentially through absorption tower one, absorption tower two, stripping from fan outlet
In tower three, stripping tower two, stripping tower one, subsequently into fan inlet, closed circulation is formed.
In step (7) of the present invention, absorbing liquid uses a concentration of 20% sodium hydroxide in absorption tower one, absorption tower two
Solution replaces absorbing liquid when naoh concentration reaches 2%~3% in absorbing liquid, and the absorbing liquid for absorbing saturation is containing high
The solution of concentration Cymag and sodium sulfite, the solution utilize again as raw material.
In step (8) of the present invention, neutralization chamber one, neutralization chamber two are strong stirring tank, and lime is added to neutralization chamber, adjusts
PH value is saved 7.5~8.5, stirred tank one, stirred tank two residence time be respectively 1h.
In step (9) of the present invention, advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor
Three residence time is respectively 2h, is added into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
Enter hydrogen peroxide, addition is 3/10000ths of waste water from dyestuff flow.
In step (10) of the present invention, a concentration of 0.2mg/L of total cyanide in the pressing filtering liquid after advanced treating~
0.5mg/L, a concentration of 100mg/L~200mg/L of inferior sulfate radical.
Beneficial effects of the present invention：
For the present invention according to the characteristic contamination of chemical industry waste water from dyestuff, i.e. cyanide and sodium sulfite etc., it is appropriate to select
Process route takes the technical method of comprehensive stripping plus depth processing, achievees the purpose that recovery of cyanide and sodium sulfite.This hair
It is bright to propose technological process simplicity, process operation safety, operational effect stabilization, cyanide and sodium sulfite rate of recovery height, operation
The relatively low comprehensive recovering process of expense.The present invention achieves extraordinary effect as comprehensive recovering process, and it is useless to reduce dyestuff
The toxicity of water reaches industrial park sewage treatment plant and enters factory's requirement, lays a good foundation for the existence and sustainable development of enterprise.This
Invention is that chemical industry solves great environmental issue, while having recycled utility, is turned waste into wealth, environmental benefit, economy
Benefit and social benefit are notable.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific implementation mode
Embodiment 1
Include the following steps：
(1) waste water from dyestuff is pumped into heater 1 and then gravity flow enters in stripping tower 1 successively；
(2) concentrated sulfuric acid is added in stripping tower 1, it is 1 to adjust pH value；
(3) flow automatically successively into stripping tower 23, stripping tower 34 from stripping tower 1 after；
(4) it is passed through air into stripping tower 1, stripping tower 23, stripping tower 34, stripping, recycling is carried out to waste water from dyestuff
Cyanide in waste water and sodium sulfite；
(5) waste water from dyestuff is reserved for one's own use into buffer reservoir 5 in stripping tower 34；
(6) it uses wind turbine 6 to carry out stripping to stripping tower 1, stripping tower 23, stripping tower 34, using absorption tower 1 and inhales
The hydrogen cyanide gas and sulfur dioxide gas that receipts 28 pairs of strippings of tower go out absorb；
(7) absorbing liquid in absorption tower 1, absorption tower 28 is regularly replaced, absorbs the absorbing liquid after nearly saturation as raw material
Recycling；
(8) waste water from dyestuff is pumped into neutralization chamber 1, neutralization chamber 2 10 in buffer reservoir 5；
(9) waste water from dyestuff after neutralizing is pumped into advanced treatment reactor 1, advanced treatment reactor 2 12, advanced treating
In reactor 3 13, then press filtration；
(10) pressing filtering liquid is discharged into industrial park sewage treatment plant pipe network, and filter-press residues are disposed according to related code requirement.
In step (1) of the present invention, a concentration of 9000mg/L~12000mg/ of total cyanide in pending waste water from dyestuff
L, a concentration of 5000mg/L~7000mg/L of inferior sulfate radical, waste water from dyestuff by being heated to 29 DEG C after heater, stripping tower one
Residence time is 2h；
In step (3) of the present invention, stripping tower two, stripping tower three residence time be respectively 2h；
In step (4) of the present invention, air intake is that stripping tower one, stripping tower two, stripping tower three are effective per hour
450 times of volume；
It is 0.5h in the residence time of buffer reservoir in step (5) of the present invention；
In step (6) of the present invention, stripping air passes sequentially through absorption tower one, absorption tower two, stripping from fan outlet
In tower three, stripping tower two, stripping tower one, subsequently into fan inlet, closed circulation is formed；
In step (7) of the present invention, absorbing liquid uses a concentration of 20% sodium hydroxide in absorption tower one, absorption tower two
Solution replaces absorbing liquid when naoh concentration reaches 2% in absorbing liquid, and the absorbing liquid for absorbing saturation is containing high concentration cyanogen
Change the solution of sodium and sodium sulfite, which utilizes again as raw material；
In step (8) of the present invention, neutralization chamber one, neutralization chamber two are strong stirring tank, and lime is added to neutralization chamber, adjusts
PH value is saved 7.5, stirred tank one, stirred tank two residence time be respectively 1h；
In step (9) of the present invention, advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor
Three residence time is respectively 2h, is added into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
Enter hydrogen peroxide, addition is 3/10000ths of waste water from dyestuff flow；
In step (10) of the present invention, a concentration of 0.2mg/L of total cyanide, sulfurous acid in the pressing filtering liquid after advanced treating
A concentration of 100mg/L of root.
Embodiment 2
Include the following steps：
(1) waste water from dyestuff is pumped into heater 1 and then gravity flow enters in stripping tower 1 successively；
(2) concentrated sulfuric acid is added in stripping tower 1, it is 1.3 to adjust pH value；
(3) flow automatically successively into stripping tower 23, stripping tower 34 from stripping tower 1 after；
(4) it is passed through air into stripping tower 1, stripping tower 23, stripping tower 34, stripping, recycling is carried out to waste water from dyestuff
Cyanide in waste water and sodium sulfite；
(5) waste water from dyestuff is reserved for one's own use into buffer reservoir 5 in stripping tower 34；
(6) it uses wind turbine 6 to carry out stripping to stripping tower 1, stripping tower 23, stripping tower 34, using absorption tower 1 and inhales
The hydrogen cyanide gas and sulfur dioxide gas that receipts 28 pairs of strippings of tower go out absorb；
(7) absorbing liquid in absorption tower 1, absorption tower 28 is regularly replaced, absorbs the absorbing liquid after nearly saturation as raw material
Recycling；
(8) waste water from dyestuff is pumped into neutralization chamber 1, neutralization chamber 2 10 in buffer reservoir 5；
(9) waste water from dyestuff after neutralizing is pumped into advanced treatment reactor 1, advanced treatment reactor 2 12, advanced treating
In reactor 3 13, then press filtration；
(10) pressing filtering liquid is discharged into industrial park sewage treatment plant pipe network, and filter-press residues are disposed according to related code requirement；
In step (1) of the present invention, a concentration of 9000mg/L~12000mg/ of total cyanide in pending waste water from dyestuff
L, a concentration of 5000mg/L~7000mg/L of inferior sulfate radical, waste water from dyestuff by being heated to 30 DEG C after heater, stripping tower one
Residence time is 2h；
In step (3) of the present invention, stripping tower two, stripping tower three residence time be respectively 2h；
In step (4) of the present invention, air intake is that stripping tower one, stripping tower two, stripping tower three are effective per hour
450 times of volume；
It is 0.5h in the residence time of buffer reservoir in step (5) of the present invention；
In step (6) of the present invention, stripping air passes sequentially through absorption tower one, absorption tower two, stripping from fan outlet
In tower three, stripping tower two, stripping tower one, subsequently into fan inlet, closed circulation is formed；
In step (7) of the present invention, absorbing liquid uses a concentration of 20% sodium hydroxide in absorption tower one, absorption tower two
Solution replaces absorbing liquid when naoh concentration reaches 2.5% in absorbing liquid, and the absorbing liquid for absorbing saturation is containing high concentration
The solution of Cymag and sodium sulfite, the solution utilize again as raw material；
In step (8) of the present invention, neutralization chamber one, neutralization chamber two are strong stirring tank, and lime is added to neutralization chamber, adjusts
PH value is saved 8.0, stirred tank one, stirred tank two residence time be respectively 1h；
In step (9) of the present invention, advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor
Three residence time is respectively 2h, is added into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
Enter hydrogen peroxide, addition is 3/10000ths of waste water from dyestuff flow；
In step (10) of the present invention, a concentration of 0.3mg/L of total cyanide, sulfurous acid in the pressing filtering liquid after advanced treating
A concentration of 150mg/L of root.
Embodiment 3
Include the following steps：
(1) waste water from dyestuff is pumped into heater 1 and then gravity flow enters in stripping tower 1 successively；
(2) concentrated sulfuric acid is added in stripping tower 1, it is 1.5 to adjust pH value；
(3) flow automatically successively into stripping tower 23, stripping tower 34 from stripping tower 1 after；
(4) it is passed through air into stripping tower 1, stripping tower 23, stripping tower 34, stripping, recycling is carried out to waste water from dyestuff
Cyanide in waste water and sodium sulfite；
(5) waste water from dyestuff is reserved for one's own use into buffer reservoir 5 in stripping tower 34；
(6) it uses wind turbine 6 to carry out stripping to stripping tower 1, stripping tower 23, stripping tower 34, using absorption tower 1 and inhales
The hydrogen cyanide gas and sulfur dioxide gas that receipts 28 pairs of strippings of tower go out absorb；
(7) absorbing liquid in absorption tower 1, absorption tower 28 is regularly replaced, absorbs the absorbing liquid after nearly saturation as raw material
Recycling；
(8) waste water from dyestuff is pumped into neutralization chamber 1, neutralization chamber 2 10 in buffer reservoir 5；
(9) waste water from dyestuff after neutralizing is pumped into advanced treatment reactor 1, advanced treatment reactor 2 12, advanced treating
In reactor 3 13, then press filtration；
(10) pressing filtering liquid is discharged into industrial park sewage treatment plant pipe network, and filter-press residues are disposed according to related code requirement；
In step (1) of the present invention, a concentration of 9000mg/L~12000mg/ of total cyanide in pending waste water from dyestuff
L, a concentration of 5000mg/L~7000mg/L of inferior sulfate radical, waste water from dyestuff by being heated to 31 DEG C after heater, stripping tower one
Residence time is 2h；
In step (3) of the present invention, stripping tower two, stripping tower three residence time be respectively 2h；
In step (4) of the present invention, air intake is that stripping tower one, stripping tower two, stripping tower three are effective per hour
450 times of volume；
It is 0.5h in the residence time of buffer reservoir in step (5) of the present invention；
In step (6) of the present invention, stripping air passes sequentially through absorption tower one, absorption tower two, stripping from fan outlet
In tower three, stripping tower two, stripping tower one, subsequently into fan inlet, closed circulation is formed；
In step (7) of the present invention, absorbing liquid uses a concentration of 20% sodium hydroxide in absorption tower one, absorption tower two
Solution replaces absorbing liquid when naoh concentration reaches 3% in absorbing liquid, and the absorbing liquid for absorbing saturation is containing high concentration cyanogen
Change the solution of sodium and sodium sulfite, which utilizes again as raw material；
In step (8) of the present invention, neutralization chamber one, neutralization chamber two are strong stirring tank, and lime is added to neutralization chamber, adjusts
PH value is saved 8.5, stirred tank one, stirred tank two residence time be respectively 1h；
In step (9) of the present invention, advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor
Three residence time is respectively 2h, is added into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
Enter hydrogen peroxide, addition is 3/10000ths of waste water from dyestuff flow；
In step (10) of the present invention, a concentration of 0.5mg/L of total cyanide, sulfurous acid in the pressing filtering liquid after advanced treating
A concentration of 200mg/L of root；Meeting being required into factory for industrial park sewage treatment plant, filter-press residues need to differentiate its property, and according to
It is provided in relation to code requirement and qualification management, voluntarily handles or give the processed in units disposition of related qualification.
Claims (10)
1. the synthetical recovery processing method of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite, which is characterized in that including
The following steps：
(1) waste water from dyestuff is pumped into heater and then gravity flow enters in stripping tower one successively；
(2) concentrated sulfuric acid is added in stripping tower one, it is 1~1.5 to adjust pH value；
(3) flow automatically successively into stripping tower two, stripping tower three from stripping tower one after；
(4) it is passed through air into stripping tower one, stripping tower two, stripping tower three, stripping is carried out to waste water from dyestuff, is recycled in waste water
Cyanide and sodium sulfite；
(5) waste water from dyestuff is reserved for one's own use into buffer reservoir in stripping tower three；
(6) wind turbine is used to carry out stripping to stripping tower one, stripping tower two, stripping tower three, it is right using absorption tower one and absorption tower two
The hydrogen cyanide gas and sulfur dioxide gas that stripping goes out are absorbed；
(7) absorbing liquid in absorption tower one, absorption tower two is regularly replaced, the absorbing liquid after nearly saturation is absorbed and repeats profit as raw material
With；
(8) waste water from dyestuff is pumped into neutralization chamber one, neutralization chamber two in buffer reservoir；
(9) waste water from dyestuff after neutralizing is pumped into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
In, then press filtration；
(10) pressing filtering liquid is discharged into industrial park sewage treatment plant pipe network, and filter-press residues are disposed according to related code requirement.
2. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (1), a concentration of 9000mg/L~12000mg/ of total cyanide in pending waste water from dyestuff
L, a concentration of 5000mg/L~7000mg/L of inferior sulfate radical, waste water from dyestuff is by being heated to 29 DEG C~31 DEG C after heater, stripping
The residence time of tower one is 2h.
3. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (3), stripping tower two, stripping tower three residence time be respectively 2h.
4. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (4), air intake is that stripping tower one, stripping tower two, stripping tower three are effective per hour
450 times of volume.
5. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：It is 0.5h in the residence time of buffer reservoir in the step (5).
6. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (6), stripping air passes sequentially through absorption tower one, absorption tower two, stripping from fan outlet
In tower three, stripping tower two, stripping tower one, subsequently into fan inlet, closed circulation is formed.
7. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (7), absorbing liquid uses a concentration of 20% sodium hydroxide in absorption tower one, absorption tower two
Solution replaces absorbing liquid when naoh concentration reaches 2%~3% in absorbing liquid, and the absorbing liquid for absorbing saturation is containing high
The solution of concentration Cymag and sodium sulfite, the solution utilize again as raw material.
8. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (8), neutralization chamber one, neutralization chamber two are strong stirring tank, and lime is added to neutralization chamber, adjusts
PH value is saved 7.5~8.5, stirred tank one, stirred tank two residence time be respectively 1h.
9. the synthetical recovery processing side of a kind of waste water from dyestuff middle and high concentration cyanide and sodium sulfite according to claim 1
Method, it is characterised in that：In the step (9), advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor
Three residence time is respectively 2h, is added into advanced treatment reactor one, advanced treatment reactor two, advanced treatment reactor three
Enter hydrogen peroxide, addition is 3/10000ths of waste water from dyestuff flow.
10. the synthetical recovery of a kind of waste water from dyestuff middle and high concentration cyanide according to claim 1 and sodium sulfite is handled
Method, it is characterised in that：In the step (10), a concentration of 0.2mg/L of total cyanide in the pressing filtering liquid after advanced treating~
0.5mg/L, a concentration of 100mg/L~200mg/L of inferior sulfate radical.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299590A (en) * | 2019-07-30 | 2021-02-02 | 中冶长天国际工程有限责任公司 | Method for treating cyanide-containing ammonium sulfite wastewater |
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| EP2559667A1 (en) * | 2010-03-26 | 2013-02-20 | Chiyoda Corporation | Treatment method of wastewater containing persistent substances |
| CN203428946U (en) * | 2013-09-09 | 2014-02-12 | 济宁阳光煤化有限公司 | Sodium sulfite air stripping tower |
| CN107954547A (en) * | 2017-11-27 | 2018-04-24 | 长春黄金研究院 | A kind of waste water from dyestuff purification method of the cyanide containing high concentration |
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2018
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| EP2559667A1 (en) * | 2010-03-26 | 2013-02-20 | Chiyoda Corporation | Treatment method of wastewater containing persistent substances |
| CN203428946U (en) * | 2013-09-09 | 2014-02-12 | 济宁阳光煤化有限公司 | Sodium sulfite air stripping tower |
| CN107954547A (en) * | 2017-11-27 | 2018-04-24 | 长春黄金研究院 | A kind of waste water from dyestuff purification method of the cyanide containing high concentration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112299590A (en) * | 2019-07-30 | 2021-02-02 | 中冶长天国际工程有限责任公司 | Method for treating cyanide-containing ammonium sulfite wastewater |
| CN112299590B (en) * | 2019-07-30 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Method for treating cyanide-containing ammonium sulfite wastewater |
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Application publication date: 20181113 |