CN101891322A - Method for treating recycling water by combining electrochemical oxidation and double-membrane methods - Google Patents
Method for treating recycling water by combining electrochemical oxidation and double-membrane methods Download PDFInfo
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- CN101891322A CN101891322A CN2009100854913A CN200910085491A CN101891322A CN 101891322 A CN101891322 A CN 101891322A CN 2009100854913 A CN2009100854913 A CN 2009100854913A CN 200910085491 A CN200910085491 A CN 200910085491A CN 101891322 A CN101891322 A CN 101891322A
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Abstract
The invention discloses a method for treating recycling water by combining electrochemical oxidation and double-membrane methods. The electrochemical oxidation method selected by the method is a three-dimensional electrode method, and the double-membrane method includes ultrafiltration and a reverse osmosis method. An electrochemical oxidation unit comprises three steps of adjusting pond treatment, electrochemical oxidation treatment and settling pond treatment. A double-membrane method unit comprises three steps of pretreatment, ultrafiltrating treatment and reverse osmosis treatment. The combination of the two units strengthens the impact resistance of a process and prolongs the service life of membranes in the double-membrane method unit; meanwhile; and under the premise of obtaining high-quality discharging water, the invention is easy for operation and management, can intermittently start and run treatment facilities, is convenient for the reconstruction and expansion of a production scale and reduces influence on the ambient environment; and the system has the characteristics of broad spectrum, high efficiency, high speed and stability during joint action.
Description
Technical field
The present invention relates to the reuse water process field, particularly a kind of three-diemsnional electrode oxidation style and two embrane method treating recycled water by combining methods.
Background technology
With industrial sewage or municipal effluent is the regeneration water source, and after the reclaiming process purifying treatment, this part process water that reaches the water quality standard of process water is called industrial reuse water.The technical process of " oil removal-flotation-biochemical treatment (activated sludge process)-precipitation " is adopted in the processing of oil refining sewerage more, even physical chemistry treatment schemees such as oil removal, filtration are only arranged, this technology has certain removal effect to chemical oxygen demand (COD) (COD), petroleum-type, and water quality after the processing and reuse requirements in water quality gap are far away.China Petrochemical Industry and PetroChina Company Limited. successively develop the refinery externally discharged waste water through the reclaimed water reuse recycling technology after similar " BAF+ coagulating sedimentation+chlorination+filtration " art breading.The technical process of " BAF+ coagulating sedimentation+chlorination+filtration ", COD, petroleum-type there is certain removal effect, but water quality and higher-grade reuse requirements in water quality gap after handling are far away, its main mechanism of action is biochemical process and physical adsorption, handles back water and contains more bio-refractory organism and recycle and easily cause accumulation.But because China most refinery crude oil source is unstable, production decision is subjected to market clout big, cause the sewage water yield and variation water quality big, treatment process is difficult to adapt to different operating modes, a little less than the impact resistance of treatment unit, outer draining only can qualified discharge, and the example of putting into production property of oil refining sewerage reuse seldom, even it is not thorough that the reuse water advanced treatment apparatus that puts into production of part also exists pollutant removal, be back to defectives such as the big and dependency height of the dosing of recirculated cooling water.
Contain many pollution substances in the sewage after primary treatment, as organic composition, inorganic components, ammonia nitriding compound and phosphoric acid salt etc., therefore in use, except meeting causes conventional corrosion, outside the problems such as fouling, also can bring the peculiar problem of water in some, as ammonia nitrogen, salt bubbles, biological excess growth etc., and influence the normal operation of system.The bio-refractory organism can't be removed in the existing treatment process, and the chlorination degerming causes secondary pollution easily, the not high and poor stability of the water quality grade of follow-up mechanical filter water outlet.In addition, the qualified discharge sewage after the processing is as the reuse water source, and reusing sewage not only can be saved a large amount of new water, increases economic efficiency, and can reduce wastewater disposition significantly, produces social environment benefit.Thereby, demand developing a kind of method of novel treatment reuse water urgently.
Summary of the invention
The purpose of this invention is to provide a kind of electrochemical oxidation and two embrane method treating recycled water by combining methods.
Electrochemical oxidation provided by the invention and two embrane method treating recycled water by combining methods are with electrochemical oxidation process and two embrane method combination treatment industrial reuse water;
Wherein, electrochemical oxidation process is the three-diemsnional electrode method, and two embrane methods are that ultrafiltration adds reverse osmosis method.
The electrochemical oxidation unit comprises that equalizing tank is handled, electrochemical oxidation is handled, settling tank is handled three steps.Two membrane method unit comprise pre-treatment, uf processing and three steps of reverse-osmosis treated.
Wherein, the three-diemsnional electrode method is to utilize the ultimate principle of three-diemsnional electrode, and matches with catalysis technique.Under certain operation condition, the coagulating agent of the hydroxyl radical free radical (OH) of generation strong oxidizing property and nascent state acts on organism and the bacterium in the water in the device, reach effect (three-diemsnional electrode electro-chemical water Processing Technology Research present situation and the direction of removing organism and bacterium, Treatment of Industrial Water, 1998,18 (1), 5-8; The three-diemsnional electrode method is handled the experimental study of oil industry wastewater COD, environmental science and technology, calendar year 2001 supplementary issue, 6-9.)。
In " two embrane method " treatment step, the used working pressure of ultrafiltration is 4 * 10
4Pa～7 * 10
5Pa, the ultra-filtration membrane aperture is the 10-100 dust; The used working pressure of reverse osmosis is 35 * 10
5Pa～140 * 10
5Pa, the reverse osmosis membrane aperture is the 1-10 dust.
Reuse water treatment process provided by the invention is used electrochemical oxidation process and two embrane method two unit associations, but electrochemical oxidation process exhaustive oxidation organism, and sterilization and disinfection guarantees that good water quality offers follow-up " two embrane method " technology simultaneously.This method has been strengthened the shock resistance of technology, guaranteed the work-ing life of film in two membrane method unit, have under the high-quality effluent quality prerequisite simultaneously, have easy handling management, treatment facility can intermittently start operation, be convenient to expand the scale of production change, extend and reduce advantages such as influence to surrounding environment, can reach wide spectrum, efficiently, fast, the purpose of stabilizing treatment reuse water.Water water quality is relatively stable coming, reach under the condition of country-level pollution exhaust criteria, utilize treatment process provided by the invention, " electrochemical oxidation process " unitary effluent quality can reach the industrial circulating cooling water standard, " two embrane method " unitary water outlet can be as boiler feedwater, and reverse osmosis concentrated water can be used as greening water and reclaimed water simultaneously.This method is applicable to the industrial efflux wastewater after oil removal-air supporting-BAF process integration is handled, and particularly contains the field of wastewater of refractory organic.
Description of drawings
Fig. 1 handles the COD of front and back water quality for electrochemical oxidation
CrValue.
Fig. 2 handles the petroleum substance content of front and back water quality for electrochemical oxidation.
Fig. 3 handles the comparison diagram in kind of front and back water outlet for electrochemical oxidation.
Embodiment
The invention will be further described below in conjunction with specific embodiment, but the present invention is not limited to following examples.Method therefor is routine operation and handles if no special instructions among the embodiment.
Embodiment 1,
Select the industrial efflux wastewater after oil removal-air supporting-biological aerated filter art breading for use, the COD value of this waste water is 70mg/L, and the content of petroleum substance is 2.5mg/L.Wherein, the COD value is measured according to national standard method (potassium dichromate process GB 7488-87).Utilize chemical oxidation provided by the invention-two embrane method associating reuse water treatment processs, according to following steps this sewage handled successively:
1) electrochemical oxidation processing unit:
Dispose of sewage with the three-diemsnional electrode method, used instrument is available from environmental protection company limited of Zhongshan University.
This step comprises the equalizing tank processing, electrochemical oxidation is handled and settling tank is handled three concrete steps.Wherein, the equalizing tank treatment step is the pipeline dosing, homogeneous, and the treatment time is 10 minutes; The chemical oxidation treatment step is the three-diemsnional electrode oxide treatment, and the treatment time is 1 hour; The settling tank treatment step is that flocculation basin adds flocculation agent adjusting basicity mistake settling tank precipitation then, and the treatment time is 2 hours.
As depicted in figs. 1 and 2, after the three-diemsnional electrode method was handled, the COD value of sewage was 60mg/L, and the content of petroleum substance is reduced to 2.0mg/L.Water quality contrast before and after handling as shown in Figure 3.As can be known, after the three-diemsnional electrode method is handled, go out water clarity and obviously clarify.This effluent quality reaches the industrial circulating cooling water standard.
2) two embrane method processing units:
Continue to dispose of sewage with two embrane methods, used instrument is available from Dongguan rising sun environmental protection company limited.
This step comprises pre-treatment, uf processing and three concrete steps of reverse-osmosis treated.Wherein, pre-treatment step is multi-medium filtering+carbon filter, and the treatment time is 30 minutes; Uf processing, it is 6 * 10 that operation is pressed
5Pa, ultra-filtration membrane molecular weight cut-off are 100,000 dalton, and treatment capacity is 2 cubic metres/hour; Reverse-osmosis treated, it is 90 * 10 that operation is pressed
5Pa, reverse osmosis membrane ratio of desalinization 99.4%, treatment capacity are 2 cubic metres/hour.
After two embrane methods were handled, the COD value of sewage was reduced to 10mg/L, and the content of petroleum substance is reduced to 0.5mg/L.This water outlet can be used as boiler feedwater and uses.
Claims (4)
1. an electrochemical oxidation is united the industrial reuse water treatment method with two embrane methods, is with electrochemical oxidation process and two embrane method combination treatment industrial reuse water;
Wherein, described electrochemical oxidation process is the three-diemsnional electrode method, and described pair of embrane method is that ultrafiltration adds reverse osmosis method.
2. in accordance with the method for claim 1, it is characterized in that: in the uf processing of described pair of embrane method, the aperture of ultra-filtration membrane is the 10-100 dust; In the reverse-osmosis treated, the aperture of reverse osmosis membrane is the 1-10 dust.
3. method according to claim 1 and 2 is characterized in that: in the uf processing of described pair of embrane method, it is 4 * 10 that the operation of ultra-filtration membrane is pressed
4Pa～7 * 10
5Pa;
In the reverse-osmosis treated, it is 35 * 10 that the operation of reverse osmosis membrane is pressed
5Pa～140 * 10
5Pa.
4. according to the arbitrary described method of claim 1-3, it is characterized in that: the method for described processing industrial reuse water is to handle industrial reuse water with electrochemical oxidation process earlier, handles industrial reuse water with two embrane methods again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100854913A CN101891322A (en) | 2009-05-22 | 2009-05-22 | Method for treating recycling water by combining electrochemical oxidation and double-membrane methods |
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|---|---|---|---|
| CN2009100854913A CN101891322A (en) | 2009-05-22 | 2009-05-22 | Method for treating recycling water by combining electrochemical oxidation and double-membrane methods |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219321A (en) * | 2011-05-11 | 2011-10-19 | 厦门市威士邦膜科技有限公司 | Recycled water recycling equipment and process |
| CN102249487A (en) * | 2011-06-07 | 2011-11-23 | 北京中盛汇大科技有限公司 | Comprehensive processing device for wastewater and waste liquid |
| CN103058424A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Deep treatment method of synthetic rubber wastewater |
| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
| CN111003895A (en) * | 2019-12-27 | 2020-04-14 | 南京工业大学 | MTO chemical wastewater membrane method zero-discharge treatment process and waste salt resource utilization technology |
-
2009
- 2009-05-22 CN CN2009100854913A patent/CN101891322A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219321A (en) * | 2011-05-11 | 2011-10-19 | 厦门市威士邦膜科技有限公司 | Recycled water recycling equipment and process |
| CN102219321B (en) * | 2011-05-11 | 2012-07-11 | 厦门市威士邦膜科技有限公司 | Recycled water recycling equipment and process |
| CN102249487A (en) * | 2011-06-07 | 2011-11-23 | 北京中盛汇大科技有限公司 | Comprehensive processing device for wastewater and waste liquid |
| CN103058424A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Deep treatment method of synthetic rubber wastewater |
| CN103058424B (en) * | 2011-10-18 | 2014-07-09 | 中国石油化工股份有限公司 | Deep treatment method of synthetic rubber wastewater |
| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
| CN111003895A (en) * | 2019-12-27 | 2020-04-14 | 南京工业大学 | MTO chemical wastewater membrane method zero-discharge treatment process and waste salt resource utilization technology |
| CN111003895B (en) * | 2019-12-27 | 2022-04-15 | 南京工业大学 | MTO chemical wastewater membrane method zero-discharge treatment process and waste salt resource utilization technology |
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Open date: 20101124 |