CN205328814U - Handle alkaline dye wastewater's device - Google Patents
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- CN205328814U CN205328814U CN201620032072.9U CN201620032072U CN205328814U CN 205328814 U CN205328814 U CN 205328814U CN 201620032072 U CN201620032072 U CN 201620032072U CN 205328814 U CN205328814 U CN 205328814U
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Abstract
The utility model discloses a handle alkaline dye wastewater's device, include the coagulating sedimentation tank, micro electrolytic reactor, flocculation and precipitation pond, MVR evaporimeter, the biochemical pond of AO and the electric catalytic oxidation device that connect gradually through the pipeline, coagulating sedimentation tank's import and alkaline dye wastewater access connection, the export and the waste water discharge port of electric catalytic oxidation device are connected, two electrodes of electricity catalytic oxidation device are metal electrode, and current density is 2mAcm2~20mAcm2. The utility model discloses in the multiple wastewater treatment process that combines, carry out the advanced treatment to alkaline dye wastewater for waste water COD after handling 50mgL, colourity 10, ensure that final exhaust waste water reaches national emission standard, simultaneously the utility model discloses in wastewater treating processes, the intermediate of production can retrieve and recycle, has reduced the waste water treatment cost, alleviates enterprise economy pressure.
Description
Technical field
This utility model relates to a kind of waste water treatment process, the specifically device of a kind of waste water from dyestuff processing high salinity, high COD bio-refractory。
Background technology
While dyeing development, the water body around printing and dyeing mill is also affected by polluting, and the colourity of this type of waste water COD high, high, salinity are high, it is difficult to process with traditional biochemical method。It is directly discharged in nature if this type of waste water is not treated, easily makes microbial death while polluted source, finally endanger human health。
At present the process main method of dye wastewater is had following several: absorption method: the most frequently used activated carbon method is by the water-insoluble and insoluble Organic substance of a large amount of hole wall absorbed portions on activated carbon and is with chromophoric Organic substance。Flocculence: flocculation is also common process means, the flocculation of many organic wastewaters can obtain good outlet effect。Bioanalysis: bioanalysis is to utilize microbial metabolism to realize pollutant minimizing, innoxious promising approach, it is possible to the effective COD removed in sewage。Chemical oxidization method: chemical oxidization method has Fenton method, hydrogen peroxide oxidation method etc.。
But above-mentioned method of wastewater treatment, however it remains bigger deficiency, especially for the process of the basic stain waste water of dyeing, the waste water after conventional waste water disposal methods is extremely difficult in line standard。The absorbability of such as absorption method is comparatively single, the colourity of more complicated direct dyes mother liquor waste water and the removal of COD is not all reached 10%, poor effect；The flocculant usage of flocculence demand is big, it is big to produce solid waste amount, is not suitable for large-scale use；Bioanalysis responding time is long, and microorganism is sensitive to conditions of existence, and waste water from dyestuff water quality is not sufficiently stable；Chemical oxidization method wastewater treatment can not be thorough, and chemical raw material uses too much, and entreprise cost is excessive。
Summary of the invention
Goal of the invention: this utility model purpose is in that for the deficiencies in the prior art, one is provided to process technique in conjunction with various wastewater, process device for the basic stain waste water of dyeing high salinity bio-refractory, while the waste water guaranteeing discharge reaches the relevant in line standard of country, alleviate the cost for wastewater treatment of enterprise。
Technical scheme: the device of process basic stain waste water described in the utility model, including the coagulative precipitation tank being sequentially connected with by pipeline, micro-electrolysis reactor, flocculation sedimentation tank, MVR vaporizer, A/O biochemistry pool and electrocatalysis oxidation apparatus, the import of described coagulative precipitation tank is connected with basic stain waste water inlet, and the outlet of electrocatalysis oxidation apparatus is connected with waste water discharge opening；Two electrodes of described electrocatalysis oxidation apparatus are metal electrode, and electric current density is 2mA/cm2~20mA/cm2。
This utility model further preferably technical scheme is, the anode of described electrocatalysis oxidation apparatus be at the bottom of titanio modification stannum antimony electrode, doping cerous nitrate, bismuth nitrate, PTFE one of which or more than one, negative electrode is and the rustless steel of anode homalographic。
Preferably, described micro-electrolysis reactor is composed in series by one or more levels micro-electrolysis device, and the bottom of every grade of described micro-electrolysis device is provided with aerator。
This utility model is applied the method that said apparatus processes basic stain waste water, comprises the steps:
(1) pretreatment: basic stain waste water is entered coagulative precipitation tank, and addition decoloration coagulant agent carries out pre-desolventing technology in coagulative precipitation tank；The more former water of water sample colourity after decolorising agent processes reduces a lot, facilitates to reclaim in subsequent processes and obtains the good NaCl salt of condition, additionally, the micelle generated in flocculation process can the little granule of partial suspended in active adsorption waste water, reduce the COD of waste water；
(2) light electrolysis: the waste water through pretreatment is entered micro-electrolysis reactor, adds the Fe-C micro electrolysis filler through high-temperature calcination in micro-electrolysis reactor, the material generated in microelectrolysis process has significantly high activity。When slant acidity, the nascent state H that reaction produces can with the material generation redox reaction in waste water, destroy original chromophoric group in waste water, make reel chain material generation chain rupture, it is finally reached decolorizing effect, simultaneously along with the carrying out of reaction, part macromolecular substances in waste water being decomposed into small-molecule substance, waste water COD is minimized。Needing in course of reaction to regulate pH with concentrated sulphuric acid, the pH value controlling waste water is 3 ~ 5, and gas-water ratio is 1:3 ~ 1:5, hydraulic detention time 60 ~ 100min；
(3) flocculation sediment: the Fe generated in microelectrolysis process3+、Fe2+The Fe (OH) existed in colloidal form is formed through hydrolysis, polymerization3、Fe(OH)2Both materials have precipitation, flocculation and adsorption, generation of flocculating together with the pollutant in waste water precipitates, Organic substance in waste water is removed, waste water after microelectrolysis processing is entered flocculation sedimentation tank, and in regulating reservoir, the pH value of waste water is to 8 ~ 10, after Air Exposure 30min, partial organic substances in waste water can be removed together along with the precipitation generated, and supernatant enters MVR vaporizer and carries out subsequent treatment；
(4) MVR evaporation: the waste water after step (3) processes is filtered, subsequently it is evaporated, isolates the salinity in waste liquid；MVR vaporizer operating cost is relatively low, and the energy consumption of one ton of water of evaporation is approximately 1/6 to the 1/5 of conventional evaporator。Replace traditional steam boiler with energising, MVR vaporizer just can be made properly functioning, production process decreases SO2、CO2, dust and solid slag discharge, the harm of environment is little。Water sample after step (3) processes being entered vaporizer process, the NaCl salinity in waste water is separated, and obtains the NaCl salt of white, and partial mother liquid must carry out reuse, and evaporate liquid and carry out subsequent treatment；
(5) A/O technique: the waste water after step (5) is processed carries out biochemical treatment, is hydrolyzed to small organic molecule by the larger molecular organics in waste water, reduces COD and the ammonia oxygen content of waste water；A segment process mainly plays a part denitrogenation dephosphorizing, O segment process is then mainly used in the Organic substance in degradation water, waste water after step (4) process is carried out biochemical treatment by this process section, larger molecular organics in waste water is hydrolyzed to small organic molecule, owing to have employed A/O technique, the COD reducing waste water can effectively reduce ammonia-nitrogen content in waste water simultaneously；
(6) electrocatalytic oxidation: the waste water after biochemical treatment is put into electrocatalysis oxidation apparatus and carries out electrocatalysis oxidation reaction, Surface Creation oxidation material at electrode, impurity in advanced treatment of waste water, the clearance of COD reaches 99.8%, finally discharge waste water, in electrocatalytic reaction process, chemical reagent need not be added, the generation of secondary pollution can be prevented effectively from, the equipment of whole process section is by a relatively simple, it is prone to Automated condtrol, the complete waste water of biochemical treatment is put into electrocatalysis oxidation apparatus and is carried out electrocatalysis oxidation reaction, some oxidizing species of Surface Creation at electrode, these strengthening property materials can effectively be degraded and be failed by the complete Organic substance of A/O PROCESS FOR TREATMENT。
Preferably, the anode of electrocatalysis oxidation apparatus described in step (6) be at the bottom of titanio modification stannum antimony electrode, doping cerous nitrate, bismuth nitrate, PTFE one of which or more than one, negative electrode is and the rustless steel of anode homalographic；Electric current density is 2mA/cm2~20mA/cm2, hydraulic detention time is 30-60min。
Preferably, micro-electrolysis reactor described in step (2) is composed in series by one or more levels micro-electrolysis device, and the bottom of every grade of described micro-electrolysis device is provided with aerator, by adding dense H in solution in microelectrolysis processing process2SO4The pH value keeping waste water is 3 ~ 5, and gas-water ratio is 1:3 ~ 1:5, hydraulic detention time 60 ~ 100min。
Processing the device and method of basic stain waste water in this, the principle applied includes:
Micro electrolysis tech is energized without extra electric field, when in reactor, waste water keeps certain acidity, Fe in micro-electrolysis stuffing is negative electrode as anode, C, self can form numerous little galvanic element, by original battery discharge, the Organic substance generation open loop in waste water, chain rupture etc. is reacted。
MVR evaporation, for being concentrated by brine waste, reclaims salinity therein, and mother solution carries out reuse, and evaporates liquid and carry out subsequent treatment。
Electrocatalytic oxidation is primarily referred to as, by the effect of extra electric field, electrode surface generate a series of oxidizing species (as?OH, O2 -、HO2 -、ROO-Deng), make the material being difficult to be processed in biochemistry be degraded。
Above-mentioned principle has had certain application in field of waste water treatment, but what in this utility model, emphasis to solve is how to be effectively combined several waste water treatment process, while the waste water guaranteeing discharge reaches the relevant in line standard of country, alleviate the cost for wastewater treatment of enterprise。
Specific works process of the present utility model described further below:
First, the pH meta-alkalescence of this waste water from dyestuff, relatively it is suitable for decoloration coagulant agent and carries out pre-desolventing technology, decoloration coagulant agent can be directly added in basic stain waste water and decolour in advance, by the water sample after decolorization flocculation, enter in micro-electrolysis reactor；
In light electrolysis operation, adopt one-level or the series connection of multistage micro-electrolysis device that waste water is processed, the water outlet of upper level micro-electrolysis device enters next stage by gravity overflow and proceeds reaction, course of reaction is passed through acid adjustment, in control reactor, wastewater pH is between 3-5 so that micro-electrolysis reaction can be smoothed out；
After micro-electrolysis reaction terminates, the Fe generated in microelectrolysis process3+、Fe2+The Fe (OH) existed in colloidal form is formed through hydrolysis, polymerization3、Fe(OH)2, both materials have precipitation, flocculation and adsorption, generation precipitation of flocculating together with pollutant, finally make the Organic substance in waste water be removed；
Containing substantial amounts of salinity in waste water after flocculation sediment, if these salinities take out without concentration, waste water cannot be carried out follow-up biochemical advanced treating；Meanwhile, after the pre-desolventing technology of front end, chroma in waste water is greatly lowered, and the salt being evaporated can continue reuse to production, saves cost；
By A segment process in A/O technique, larger molecular organics is hydrolyzed to small organic molecule, improves the biodegradability of waste water, by O segment process so that waste water can be further processed；
Still having the reluctant material of fraction in bio-chemical effluent, finally waste water is carried out electrocatalytic oxidation, carry out advanced treating, finally make discharged wastewater met the national standard, electrocatalysis oxidation reaction produces?OH, electrode potential reaches 2.8V(), it is possible to react with major part Organic substance, reluctant for biochemical process Organic substance is converted to small-molecule substance, and can be H by partial organic substances direct oxidation2O-and CO2, reduce water outlet COD, high treating effect。
Beneficial effect: organically combine various wastewater in (1) this utility model and process technique, basic stain waste water is carried out advanced treating, make COD < 50mg/L, the colourity < 10 of waste water, it is ensured that the final waste water discharged reaches discharging standards；This utility model is in processing procedure simultaneously, additive in the middle of saving, and reclaims intermediate product, it is possible to cost for wastewater treatment of terminating an agreement, alleviates business economic pressure；
(2) owing to electrocatalytic oxidation can without being selectively carbon dioxide, water and mineral by the substance decomposition of difficult degradation in waste water, in processing procedure, electron transfer only occurs between Ti-base Sn-Sb electrode surface and waste water, rely on course of reaction generates oxidizing species---Organic substance is aoxidized by hydroxyl radical free radical etc., need not adding medicinal liquid, non-secondary pollution produces；Organic substance can be degraded quickly in course of reaction, and hydraulic detention time shorter (30-60min), required equipment volume is little；Mild condition needed for this reaction, it is possible to carry out at normal temperatures and pressures, simple to operate, flexible, reaction condition can be changed at any time by change voltage, electric current density, it is easy to operation；Adopt Ti-base Sn-Sb electrode, this electrode is absent from burn into problem of passivation, there is efficient, long-life feature, this utility model adopts electrocatalytic oxidation that waste water is carried out advanced treating, shock-resistant ability is strong, even if the effluent quality after biochemistry has fluctuation, it is also possible to ensure stable effluent quality, the method is simple to operate and operation cost is relatively low, has good economic and social benefit。
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of process basic stain waste water described in the utility model；
Fig. 2 is the wastewater treatment process figure of the device of process basic stain waste water described in the utility model。
Detailed description of the invention
Below by accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment。
Embodiment:A kind of device processing basic stain waste water, including the coagulative precipitation tank being sequentially connected with by pipeline, micro-electrolysis reactor, flocculation sedimentation tank, MVR vaporizer, A/O biochemistry pool and electrocatalysis oxidation apparatus, the import of described coagulative precipitation tank is connected with basic stain waste water inlet, and the outlet of electrocatalysis oxidation apparatus is connected with waste water discharge opening。
The anode of described electrocatalysis oxidation apparatus be at the bottom of titanio modification stannum antimony electrode, doping cerous nitrate, bismuth nitrate, PTFE one of which or more than one, negative electrode is and the rustless steel of anode homalographic。
Described micro-electrolysis reactor is composed in series by one or more levels micro-electrolysis device, and the bottom of every grade of described micro-electrolysis device is provided with aerator。
This device of a kind of application processes the method for basic stain waste water, comprises the steps:
(1) pretreatment: basic stain waste water is entered coagulative precipitation tank, and addition decoloration coagulant agent carries out pre-desolventing technology in coagulative precipitation tank, the more former water of water sample colourity after decolorising agent processes reduces a lot, facilitate subsequent processes reclaims and obtain the good NaCl salt of condition, in addition, the micelle generated in flocculation process can the little granule of partial suspended in active adsorption waste water, reduce the COD of waste water；
(2) light electrolysis: the waste water through pretreatment is entered micro-electrolysis reactor, adds the Fe-C micro electrolysis filler through high-temperature calcination in micro-electrolysis reactor, the material generated in microelectrolysis process has significantly high activity。When slant acidity, the nascent state H that reaction produces can with the material generation redox reaction in waste water, destroy original chromophoric group in waste water, make reel chain material generation chain rupture, it is finally reached decolorizing effect, simultaneously along with the carrying out of reaction, part macromolecular substances in waste water being decomposed into small-molecule substance, waste water COD is minimized。Needing in course of reaction to regulate pH with concentrated sulphuric acid, the pH value controlling waste water is 3 ~ 5, and gas-water ratio is 1:3 ~ 1:5, hydraulic detention time 60 ~ 100min,
(3) flocculation sediment: the Fe generated in microelectrolysis process3+、Fe2+The Fe (OH) existed in colloidal form is formed through hydrolysis, polymerization3、Fe(OH)2Both materials have precipitation, flocculation and adsorption, generation of flocculating together with the pollutant in waste water precipitates, Organic substance in waste water is removed, waste water after microelectrolysis processing is entered flocculation sedimentation tank, and in regulating reservoir, the pH value of waste water is to 8 ~ 10, after Air Exposure 30min, partial organic substances in waste water can be removed together along with the precipitation generated, and supernatant enters MVR vaporizer and carries out subsequent treatment；
(4) MVR evaporation: the waste water after step (3) processes is filtered, subsequently it is evaporated, isolates the salinity in waste liquid；MVR vaporizer operating cost is relatively low, and the energy consumption of one ton of water of evaporation is approximately 1/6 to the 1/5 of conventional evaporator。Replace traditional steam boiler with energising, MVR vaporizer just can be made properly functioning, production process decreases SO2、CO2, dust and solid slag discharge, the harm of environment is little。Water sample after step (3) processes being entered vaporizer process, the NaCl salinity in waste water is separated, and obtains the NaCl salt of white, and partial mother liquid must carry out reuse, and evaporate liquid and carry out subsequent treatment；
(5) A/O technique: A segment process mainly plays a part denitrogenation dephosphorizing, O segment process is then mainly used in the Organic substance in degradation water, waste water after step (4) process is carried out biochemical treatment by this process section, larger molecular organics in waste water can be hydrolyzed to small organic molecule, owing to have employed A/O technique, the COD reducing waste water can effectively reduce ammonia-nitrogen content in waste water simultaneously；
(6) electrocatalytic oxidation: the waste water after biochemical treatment is put into electrocatalysis oxidation apparatus and carries out electrocatalysis oxidation reaction, Surface Creation oxidation material at electrode, impurity in advanced treatment of waste water, the clearance of COD reaches 99.8%, finally discharge waste water, the anode of described electrocatalysis oxidation apparatus be at the bottom of titanio modification stannum antimony electrode, doping cerous nitrate, bismuth nitrate, PTFE one of which or more than one, negative electrode is and the rustless steel of anode homalographic；Electric current density is 2mA/cm2~20mA/cm2, hydraulic detention time is 30-60min。
Industrial wastewater for certain printing and dyeing mill is described in detail in the present embodiment, and the alkaline waste water salinity of certain printing and dyeing mill is about 8.8%, and this waste water is atrous, and COD is about 19810, and colourity is about 3500 times。
Specifically include following steps:
Adding the flocculating decoloring agent of 3 ‰ consumptions in above-mentioned waste water, the color of former water is become faint yellow from atrous, creates a large amount of flocculent deposit, and colourity have dropped about 35% ~ 45%, and COD clearance is 4.3%。
Waste water after flocculation treatment being entered micro-electrolysis reactor react, after reaction 120min, the colourity of water outlet controls at about 300 times, and chroma removal rate is 86%, and COD clearance is 31%。
By calcium oxide, the water sample after microelectrolysis processing being regulated pH and carries out flocculation sediment technique, effluent color dilution is about 30 times, and chroma removal rate is 99.1%, and COD clearance is 43%。
Being concentrated by MVR vaporizer by above-mentioned water sample, salt therein is standby to separating, and distillate carries out biochemical treatment, and the color of distillate is water white transparency, and COD clearance is 90.1%。
Distillate carries out A/O PROCESS FOR TREATMENT, and waste water is after processing, and the clearance of COD reaches 98%, carries out advanced treating finally by electrocatalytic oxidation metallization processes, and the clearance of final COD reaches 99.8%, reaches emission request。
Although as it has been described above, represented and described the present invention with reference to specific preferred embodiment, but it shall not be construed as the restriction to the present invention self。Under the spirit and scope of the present invention premise defined without departing from claims, it can be made in the form and details various change。
Claims (3)
1. the device processing basic stain waste water, it is characterized in that, including the coagulative precipitation tank being sequentially connected with by pipeline, micro-electrolysis reactor, flocculation sedimentation tank, MVR vaporizer, A/O biochemistry pool and electrocatalysis oxidation apparatus, the import of described coagulative precipitation tank is connected with basic stain waste water inlet, and the outlet of electrocatalysis oxidation apparatus is connected with waste water discharge opening；Two electrodes of described electrocatalysis oxidation apparatus are metal electrode, and electric current density is 2mA/cm2~20mA/cm2。
2. the device of process basic stain waste water according to claim 1, it is characterized in that, the anode of described electrocatalysis oxidation apparatus be at the bottom of titanio modification stannum antimony electrode, doping cerous nitrate, bismuth nitrate, PTFE one of which or more than one, negative electrode is and the rustless steel of anode homalographic。
3. the device of process basic stain waste water according to claim 1, it is characterised in that described micro-electrolysis reactor is composed in series by one or more levels micro-electrolysis device, and the bottom of every grade of described micro-electrolysis device is provided with aerator。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106698597A (en) * | 2016-12-22 | 2017-05-24 | 常州大学 | Method of fast advanced treatment of dye wastewater |
| CN107902835A (en) * | 2016-08-24 | 2018-04-13 | 南京万德斯环保科技股份有限公司 | A kind of device for handling high solids content high-salt wastewater |
| CN108658356A (en) * | 2018-06-20 | 2018-10-16 | 于婷婷 | A kind of printing ink wastewater recycling device |
| CN109095709A (en) * | 2018-08-15 | 2018-12-28 | 新疆天蓝水清环境服务有限公司 | A kind of advanced oxidization method of pair of dyeing waste-water decolorizing |
| CN109354338A (en) * | 2018-12-14 | 2019-02-19 | 科盛环保科技股份有限公司 | A kind of device and method of advanced treating Lonster production waste water |
| CN109516641A (en) * | 2018-12-17 | 2019-03-26 | 南通寰宇博新化工环保科技有限公司 | Method for treating high-salt high-concentration organic wastewater by electrocatalytic oxidation-biochemical coupling |
| CN110066078A (en) * | 2019-06-11 | 2019-07-30 | 上海海洋大学 | A kind of dyeing waste water C.E advanced oxidation advanced treatment system |
| CN110304781A (en) * | 2019-07-30 | 2019-10-08 | 安徽东至广信农化有限公司 | Waste water treatment process and processing system after a kind of production of nitro-chlorobenzene |
| CN111115977A (en) * | 2020-01-17 | 2020-05-08 | 岳阳林纸股份有限公司 | Method and system for treating quinacridone production wastewater |
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| CN115180757A (en) * | 2022-06-24 | 2022-10-14 | 鄂尔多斯市环保投资有限公司 | Harmless comprehensive treatment method for detecting and analyzing operation and maintenance waste liquid containing chromium, mercury and cyanogen |
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| CN107902835A (en) * | 2016-08-24 | 2018-04-13 | 南京万德斯环保科技股份有限公司 | A kind of device for handling high solids content high-salt wastewater |
| CN106698597A (en) * | 2016-12-22 | 2017-05-24 | 常州大学 | Method of fast advanced treatment of dye wastewater |
| CN108658356A (en) * | 2018-06-20 | 2018-10-16 | 于婷婷 | A kind of printing ink wastewater recycling device |
| CN109095709A (en) * | 2018-08-15 | 2018-12-28 | 新疆天蓝水清环境服务有限公司 | A kind of advanced oxidization method of pair of dyeing waste-water decolorizing |
| CN109354338A (en) * | 2018-12-14 | 2019-02-19 | 科盛环保科技股份有限公司 | A kind of device and method of advanced treating Lonster production waste water |
| CN109516641A (en) * | 2018-12-17 | 2019-03-26 | 南通寰宇博新化工环保科技有限公司 | Method for treating high-salt high-concentration organic wastewater by electrocatalytic oxidation-biochemical coupling |
| CN110066078A (en) * | 2019-06-11 | 2019-07-30 | 上海海洋大学 | A kind of dyeing waste water C.E advanced oxidation advanced treatment system |
| CN110304781A (en) * | 2019-07-30 | 2019-10-08 | 安徽东至广信农化有限公司 | Waste water treatment process and processing system after a kind of production of nitro-chlorobenzene |
| CN111115977A (en) * | 2020-01-17 | 2020-05-08 | 岳阳林纸股份有限公司 | Method and system for treating quinacridone production wastewater |
| CN111115977B (en) * | 2020-01-17 | 2023-06-30 | 湖南诚通天岳环保科技有限公司 | Quinacridone production wastewater treatment method and system |
| CN113683256A (en) * | 2021-08-03 | 2021-11-23 | 安徽康菲尔检测科技有限公司 | Zero-discharge treatment process and treatment device for production wastewater of regenerated SCR (selective catalytic reduction) catalyst |
| CN115180757A (en) * | 2022-06-24 | 2022-10-14 | 鄂尔多斯市环保投资有限公司 | Harmless comprehensive treatment method for detecting and analyzing operation and maintenance waste liquid containing chromium, mercury and cyanogen |
| CN115180757B (en) * | 2022-06-24 | 2024-05-17 | 鄂尔多斯市环保投资有限公司 | Harmless comprehensive treatment method for operation and maintenance waste liquid detection and analysis waste liquid containing chromium, mercury and cyanogen |
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