CN100497189C - Method of purifying O-phenylenediamine sodium sulfide reducing waste water - Google Patents
Method of purifying O-phenylenediamine sodium sulfide reducing waste water Download PDFInfo
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- CN100497189C CN100497189C CNB2006100410694A CN200610041069A CN100497189C CN 100497189 C CN100497189 C CN 100497189C CN B2006100410694 A CNB2006100410694 A CN B2006100410694A CN 200610041069 A CN200610041069 A CN 200610041069A CN 100497189 C CN100497189 C CN 100497189C
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- mother liquor
- water
- sodium sulfide
- phenylenediamine
- liquor water
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Abstract
The present invention relates to new method of purifying o-phenylenediamine sodium sulfide reducing waste water. Unlike available sodium sulfide reducing waste water treating process, which results in secondary pollution, the method of the present invention treats o-phenylenediamine sodium sulfide reducing waste water through vacuum evaporation, eliminating sodium chloride, vacuum concentrating and other steps while obtaining sodium sulfite mixture. The present invention eliminates pollution caused by o-phenylenediamine radically.
Description
Technical field:
The present invention relates to the purification treatment technology of wastewater from chemical industry, particularly a kind of method of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater.
Background technology:
O-Phenylene Diamine is Chemicals more salable on the domestic and international market, and factory mostly adopts the processing method of sodium sulfide reducing and obtains.Because O-Phenylene Diamine can produce sodium sulfide reducing waste water a large amount of, high density in process of production, as the direct discharging that does not have appropriate method to carry out purifying treatment, waste water causes severe contamination will for people's survival environment.At present, the treatment process that has producer to use o-phenylenediamine sodium sulfide reduction wastewater to produce Sulfothiorine as the mother liquor water reuse attempts to reclaim the useful component in the waste water, thus pollution abatement.But facts have proved, this treatment process does not reach the anticipation effect, carry out oxidizing reaction because in the process of producing the Sulfothiorine product with this wastewater treatment, need to add sulphur, and for satisfying its processing condition, power consumption, coal consumption height, the requirement of fresh water is big especially again, and a large amount of harmful sulfur dioxide gas and waste residue, the waste water that are produced have caused the secondary serious pollution again.So,, also restricted the expansion production of O-Phenylene Diamine to a certain extent because of pollution problem can't resolve.Therefore in the last few years, scientific and technical personnel were that this problem is being studied in the novel method unremitting effort always of seeking the purifying treatment o-phenylenediamine sodium sulfide reduction wastewater in the industry.
Summary of the invention:
The method of a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater provided by the invention, purpose is fundamentally the O-Phenylene Diamine factory effluent to be administered, improve a cover and utilize this waste water to carry out the cleaning procedure that resource utilization is produced, thoroughly solve because of producing the pollution problem that O-Phenylene Diamine brings.
Technical solution of the present invention:
The present invention utilizes the effective ingredient in the o-phenylenediamine sodium sulfide reduction wastewater (hereinafter to be referred as mother liquor water), according to the principle of chemical reaction, formulates special process, takes following steps to finish whole wastewater treatment process, and obtains useful material.Steps in sequence is as follows:
(1) vacuum-evaporation mother liquor water;
(2) remove the contained sodium-chlor of mother liquor water;
(3) the vacuum concentration mother liquor water of desalination obtains material-S-WAT mixture.
Positively effect of the present invention:
(1) purifying treatment o-phenylenediamine sodium sulfide reduction wastewater, fundamentally solved the severe contamination problem that O-Phenylene Diamine produced of producing;
(2) realized resource utilization production, need not add other chemical material, only utilizing S-WAT that o-phenylenediamine sodium sulfide reduction wastewater produces and composition thereof is again the requisite raw material of paper industry with sulphite manufactured paper pulp;
(3) the full technological process of the present invention is and cleans production process, and non-secondary pollution produces, and the Pollution abatement effect obviously is better than the method with the aquatic product Sulfothiorine of this mother liquor;
(4) the inventive method investment is little, energy consumption is low, and method is simple and practical, is easy to utilization and extention in the industry.
Description of drawings:
Accompanying drawing is a process flow diagram of the present invention
Embodiment:
The basic chemical substance of production O-Phenylene Diamine gained waste water one mother liquor water of the present invention is formed (by weight percentage):
Sodium sulphite (Na
2S) 2.5%-405%
Sodium hydroxide (NaoH) 3.6%-9%
Sulfothiorine (Na
2S
2O
3) 17.5%～20%
Sodium-chlor (Nacl) 8%-10%
Other organism 0.1-0.4%
The equation of the chemical principle of institute of the present invention foundation is:
3N?a
2S
2O
3+6NaoH＝2N?a
2S+4N?a
2SO
3+3H
2O
As seen the resultant that reacts last is that S-WAT is the mixture of master's comprehensive reduzate, and this mixture can be used as the industrial chemicals that paper-making industry is made paper pulp.
Below in conjunction with accompanying drawing, further narrate the inventive method step:
(1) filtrated stock water.Floating matters in the removal mother liquor water etc. are driven into mother liquor water in the vaporizer with pump from store pond or storage tank, and make the mother liquor water yield account for 40-60% of vaporizer cubic capacity, are no more than 60% of cubic capacity;
(2) carry out vacuum-evaporation.When the mother liquor water concentration reaches 50-55 degree Beaume in the container, stop evaporation; In the evaporative process with water coolant by the condenser cooling steam, and will have coffee-like water of condensation and converge and collect the back, use charcoal absorption, the clear water that adsorbed remakes cooling water circulation use, and the gac after adsorbing can be used as boiler oil and burns into breeze.
(3) remove the contained sodium-chlor of mother liquor water.Need make the mother liquor water temp remain between 60 ℃-90 ℃ (being no more than 90 ℃), mother liquor water is pumped into heavy salt cellar during desalination, and continuation keeps said temperature, behind the quiescent settling 2-2.5 hours, open heavy salt pot bottom emit molten salt to whizzer dry industrial salt.Compile the mother liquor water of heavy salt cellar middle and upper part and the mother liquor water that whizzer throws away thereof then.
(4) vacuum concentration.With the above-mentioned mother liquor water that compiles, pump in the vacuum scraper-type concentration tank and concentrate, when vacuum tightness reach 80-85Kpa, jar in temperature of charge when reaching 135 ℃-145 ℃, stop to concentrate, emit in the jar mixture while hot based on S-WAT.
(5) above-mentioned material is carried out physical treatment, the S-WAT mixture is deposited into cool place, cleaning, lucifuge, keeps away the ground of water, and need make the material stacking highly be no more than 30cm, cool off 22-28 hour, become the solid substance of hard chocolate to material, be divided into piece again, be ground into particulate state or powder shape by pulverizer, get finished product after the packing of weighing.
The ratio that the present invention utilizes O-Phenylene Diamine waste water to produce the content of S-WAT mixture is:
This product of S-WAT: Sulfothiorine: Sodium Sulphide=5:1:2.5 meets the requirement of the used industrial chemicals of papermaking system oar.
Now provide embodiment again:
Handle 4 tons in mother liquor water, filter, vacuum-evaporation, make the mother liquor water yield that enters vaporizer account for 50% of vaporizer total volume, the mother liquor water concentration reaches 52 degree Beaume, and evaporation ends.60 ℃ of maintenance mother liquor water temperatures, to heavy salt cellar, quiescent settling 2 hours is opened the low valve of heavy salt cellar jar, is emitted molten salt, dries, gets 300 kilograms of Industrial Salts with whizzer with the mother liquor water pump.With 2 tons of cooled vapor of water, collect 2.4 tons in vapour condensation water in this process, with 10 kilograms of absorption of gac, this gac can be used as boiler oil and burns, pollution-free generation.The mother liquor water that is evaporated to 52 degree Beaume and takes off supersalt is pumped into vacuum scraper-type concentrating under reduced pressure jar to be concentrated, vacuum tightness is 80Kpa, temperature of charge reaches 135 ℃, stop to concentrate, emit while hot material to cool place, lucifuge, keep away Shui Chu, stack height 25cm (to prevent spontaneous combustion), cool off after 24 hours, get 1 ton in solid sodium sulfite mixture.And then carry out break process, the finished product packing of different size on request.This finished product is through chemical examination, and its weight percent content respectively is: S-WAT (Na
2SO
3) 47%, Sulfothiorine (Na
2S
2O
3) 10.7%, Sodium Sulphide (Na
2S) 25.2%.
To sum up, wholely utilize non-pollutant discharge in the process that the o-phenylenediamine sodium sulfide reduction wastewater resource utilization produces S-WAT, reach the goal of the invention of expection.
Claims (7)
1, a kind of method of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater, it is characterized in that: this method is carried out purifying treatment with o-phenylenediamine sodium sulfide reduction wastewater as mother liquor water, and having obtained S-WAT, Sulfothiorine, Sodium Sulphide miscellany, the key step of this method is: mother liquid evaporation water in vacuum state at first; Sedimentation removes the sodium-chlor in the above-mentioned mother liquor water then; The above-mentioned mother liquor water that will remove sodium-chlor again carries out vacuum concentration.
2, the method for a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater according to claim 1 is characterized in that: the step that also comprises the mother liquor water filtration before the described vacuum-evaporation mother liquor water step; The described sodium-chlor mother liquor water that removes carries out also comprising the treatment step that concentrates material after the step of vacuum concentration.
3, the method for a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater according to claim 2, it is characterized in that: the treatment step of described concentrated material is vacuum decompression to be concentrated the back material emit from jar while hot and be deposited into cool place, cleaning, lucifuge, keep away the water part, and stacking highly is no more than 30cm, is cooled to material and becomes solid substance.
4, the method for a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater according to claim 1, it is characterized in that: in the described vacuum-evaporation mother liquor water step, the water yield that mother liquor water enters vaporizer accounts for 40-60% of vaporizer total volume, and evaporative concn when reaching 50-55 degree Beaume, stops evaporation.
5, according to the method for claim 1 or 4 described a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewaters, it is characterized in that: with the water cooling steam, after vapour condensation water gathers, make adsorption treatment in the vacuum-evaporation mother liquor water step with gac.
6, the method for a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater according to claim 1, it is characterized in that: the described mother liquor water sodium-chlor step that removes, the mother liquor water temperature is remained between 60 ℃-90 ℃, quiescent settling 2-2.5 hours, the gained molten salt dries through whizzer, gets the finished product Industrial Salt.
7, the method for a kind of purifying treatment o-phenylenediamine sodium sulfide reduction wastewater according to claim 1, it is characterized in that: the step of described vacuum concentration mother liquor water is to carry out in vacuum scraper-type concentration tank, when vacuum tightness reach 80-85Kpa, jar in temperature of charge when reaching 135 ℃-145 ℃, stop to concentrate, from jar, emit the S-WAT mixture while hot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100410694A CN100497189C (en) | 2006-07-20 | 2006-07-20 | Method of purifying O-phenylenediamine sodium sulfide reducing waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100410694A CN100497189C (en) | 2006-07-20 | 2006-07-20 | Method of purifying O-phenylenediamine sodium sulfide reducing waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1887729A CN1887729A (en) | 2007-01-03 |
| CN100497189C true CN100497189C (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100410694A Expired - Fee Related CN100497189C (en) | 2006-07-20 | 2006-07-20 | Method of purifying O-phenylenediamine sodium sulfide reducing waste water |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101200336B (en) * | 2007-12-18 | 2010-12-08 | 赵志军 | Process for zero-discharge treatment of o-phenylenediamine sodium sulfide reduction wastewater |
| CN106746123B (en) * | 2016-12-30 | 2019-06-04 | 盐城海德能水处理环保工程有限公司 | A kind of process for treating industrial waste water and system containing organic solvent |
| CN107867776B (en) * | 2017-11-08 | 2021-03-02 | 江苏易简环保科技有限公司 | Method and process for recycling pesticide wastewater |
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Granted publication date: 20090610 Termination date: 20180720 |