CN102249466B - System and method for treating wastewater - Google Patents
System and method for treating wastewater Download PDFInfo
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- CN102249466B CN102249466B CN 201010177971 CN201010177971A CN102249466B CN 102249466 B CN102249466 B CN 102249466B CN 201010177971 CN201010177971 CN 201010177971 CN 201010177971 A CN201010177971 A CN 201010177971A CN 102249466 B CN102249466 B CN 102249466B
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Abstract
The invention discloses a system and method for treating coking wastewater. The system comprises: an electric coagulation treatment module used for filtering wastewater dross; a pre treatment module used for pre-treating quality of water processed from the electric coagulation treatment, such that the water satisfies a reverse osmosis requirement; and a reverse osmosis module used for carrying out a reverse osmosis treatment. The electric coagulation treatment module comprises a high-pressure high-frequency pulse electric coagulation device, a buffering tank, a precipitating tank and a clarifying tank. The pre treatment module comprises an ultra-filtration membrane clarifying device and a scale inhibitor dosing device. The reverse osmosis module comprises filters and reverse osmosis devices. With the electrochemical coking wastewater treatment system provided by the invention, coking wastewater treating effect is good, operation cost is low, secondary pollution is not brought in, and the system is easy to manage.
Description
Technical field
The present invention relates to water-treatment technology field, relate in particular to a kind of coking wastewater processing system and method.
Background technology
Coking chemical waste water is the waste water that coal forms in the high temperature carbonization process and in the gas purification, chemical products treating process, wherein contain tens kinds of pollutents such as phenol, ammonia nitrogen, cyanogen, benzene, pyridine, indoles and quinoline, complicated component, and Pollutant levels height, colourity height, toxicity are big, character is highly stable, is a kind of typical organic wastewater with difficult degradation thereby.Its discharging that exceeds standard has all constituted very big harm to the mankind, aquatic products and farm crop.
At present, coking chemical waste water generally carries out pre-treatment according to a conventional method, carries out biological dephenolize secondary treatment then.But coking chemical waste water is after above-mentioned processing, and indexs such as prussiate, COD and ammonia nitrogen still are difficult to up to standard in the efflux wastewater.At this situation, in recent years, Chinese scholars has been carried out number of research projects, has found many more effective TREATMENT OF COKING technology, roughly comprises: three kinds of biological treatment, electrochemical treatment method and physicochemical treatment methods etc.
Yet can the coking chemical waste water technology successful Application, restricted by three factors: treatment effect, investment working cost and whether can cause secondary pollution.Current various improvement technology can't satisfy the requirement of this three aspect fully, and they respectively have relative merits, and this just needs us to develop a kind of coking waste water treatment method that can satisfy above-mentioned effect.
Summary of the invention
For solving the problems of the technologies described above, we have proposed a kind of coking wastewater processing system and method thereof, with realize that Treatment of Coking Effluent is effective, working cost is low, advantages such as non-secondary pollution and easy handling management.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of coking wastewater processing system comprises:
The electricity that is used for the filtered wastewater scum silica frost coagulates processing module;
Be used for and carry out pre-treatment by the effluent quality that electricity coagulates processing module, to reach the pre-processing module of reverse osmosis requirement;
Be used for carrying out the reverse osmosis module of reverse-osmosis treated;
Described electricity coagulates processing module and comprises high voltagehigh frequency pulse electro-flocculation device, Buffer Pool, settling tank and settling pond; Described pre-processing module comprises ultra-filtration membrane refining plant and Scale inhibitors chemicals dosing plant; Described reverse osmosis module comprises strainer and reverse osmosis system.
Preferably, also comprise the recycling module that can utilize water quality be used to reclaiming.
Preferably, described reverse osmosis unit comprises secondary or multistage reverse osmosis unit.
Preferably, described pre-processing module also comprises the backwash device.
Preferably, described backwash device comprises backwashing pump, backwash bag filter and air compressor machine.
A kind of coking waste water treatment method comprises:
Waste water is separated through high voltagehigh frequency pulse electro-flocculation device, and obtain first water quality treatment through buffering, post precipitation;
Described first water quality treatment is handled through described ultra-filtration membrane refining plant, obtained second water quality treatment;
Described second water quality treatment is carried out reverse-osmosis treated, obtain to utilize water quality and residue waste water quality.
Preferably, described with waste water before high voltagehigh frequency pulse electro-flocculation device separates, also comprise in advance high voltagehigh frequency pulse electro-flocculation device debugged.
Preferably, described with described first water quality treatment after described ultra-filtration membrane refining plant is handled, also comprise described ultra-filtration membrane refining plant carried out backwash.
Preferably, described obtain utilizing water quality and residue waste water quality after, also comprise reclaiming and describedly utilize water quality and residue waste water is handled.
Description by technique scheme, coking wastewater processing system proposed by the invention, utilize high voltagehigh frequency pulse electric coagulation device, adopt the electrolytic process of high-voltage, little electric current to realize the organic or inorganic thing in the waste water is carried out redox reaction, and then condense, float and remove, pollutent is separated from water, simultaneously, the present invention also further purifies water quality in conjunction with the UF device and separates, by the present invention, can realize good Treatment of Coking Effluent effect, and working cost is low, non-secondary pollution, easy handling management simultaneously.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the disclosed a kind of coking wastewater processing system of the embodiment of the invention;
Fig. 2 is the schema of the disclosed a kind of coking waste water treatment method of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention provides a kind of electrochemical process coking wastewater processing system, this system comprises that mainly three big moulds certainly: electricity coagulates processing module, pre-processing module and reverse osmosis module.
The electric processing module of coagulating mainly adopts high voltagehigh frequency pulse electro-flocculation device among the present invention.
High voltagehigh frequency pulse electro-flocculation device is a kind of equipment that carries out water treatment by high-voltage, little electric current, this equipment utilization electrochemical principle, produce electrochemical reaction by the applying high voltage effect, electric energy is converted into chemical energy, can carry out redox reaction to the organic or inorganic thing in the waste water, and then condense, float and remove, pollutent is separated from water, can take out the Cr in the electroplating integrated waste water effectively
6+, Cu
2+, CN
-, oil, phosphoric acid salt and COD, SS and colourity.High voltagehigh frequency pulse electro-flocculation device of the present invention can guarantee that voltage still can make the break make ratio of square topped pulse adjustable continuously when 500V.
The setting of pre-processing module, its purpose is to improve water supply conditions, and making supplies water reaches the water inlet requirement of reverse osmosis module, thus the protection reverse osmosis unit, and the work-ing life of prolongation mould.In pre-processing module, the present invention mainly adopts the ultra-filtration membrane refining plant, and in conjunction with common realizations such as Scale inhibitors chemicals dosing plants.
Ultrafiltration (UF) is a kind of screening process relevant with the membrane pore size size, pressure difference with the film both sides is motivating force, be filtration medium with the ultra-filtration membrane, under certain pressure, when stoste flow through the film surface, the many tiny micropore that gathers in the ultra-filtration membrane surface only allowed water and small-molecule substance by becoming through liquid, and volume then is trapped within the liquid feeding side of film in the stoste greater than the material in film surface micropore footpath, become concentrated solution, thereby realize purification, separation and concentrated purpose to stoste.
The ultra-filtration membrane aperture can be preferably 0.2-0.5um in the scope of 0.2-1.0um, 0.2-0.4um more preferably, and the UF membrane material can be polyvinylidene difluoride (PVDF) (PVDF), polypropylene (PP), polyvinyl chloride (PVC).
Reverse osmosis module mainly comprises accurate filter and reverse osmosis system etc., and wherein reverse osmosis system can comprise secondary or multistage reverse osmosis unit, and among the present invention, reverse osmosis system is the two-pass reverse osmosis device.
This system also comprises a recycling module, is used for reclaiming the water quality utilized after handling.
A kind of coking wastewater processing system proposed by the invention can be system shown in Figure 1, and is not limited to following system.This system comprises: water collecting basin 1, the high pressure pump housing 2, high voltagehigh frequency pulse electro-flocculation device 3, Buffer Pool 4, settling tank 5, settling pond 6, ultra-filtration membrane refining plant 7, gas blower 8, UF pond 9, accurate filter 10, Scale inhibitors chemicals dosing plant 11, first-stage reverse osmosis device 12, dense water tank 13, two-pass reverse osmosis device 14, return water tank 15 and wastewater trough 16.Pending waste water is placed water collecting basin 1, by the high pressure pump housing 2 pending waste water is fed high voltagehigh frequency pulse electro-flocculation device 3 and carry out electrochemical treatment, to divide the pollutent in dried up, after water quality after handling cushioned by Buffer Pool 4, entering settling tank 5 precipitates, and the pollutent that is settled out removed, simultaneously, the water quality of post precipitation is fed settling pond 6, settling pond 6 can be regulated the pH value of water quality, make it to satisfy emission standard, after settling pond 6, can obtain first water quality treatment, by the high pressure pump housing 2 described first water quality treatment be fed ultra-filtration membrane refining plant 7 and carry out uf processing, obtain second water quality treatment, and with described second water quality treatment feeding UF pond 9,9 places, UF pond arrange two place's high pressure pump housings, and place's high-pressure pump body is used for extracting described second water quality treatment ultra-filtration membrane refining plant 7 is carried out backwash, and the water quality flushing after the backwash drops into Buffer Pool 4; Another place's high-pressure pump body is used for the described second water quality treatment suction accurate filter 10 and Scale inhibitors chemicals dosing plant 11 are further filtered, at last, feed first-stage reverse osmosis device 12 and carry out the first-stage reverse osmosis processing, obtain to utilize water quality and the dense water of one-level after treatment, can utilize water quality to feed return water tank 15, the dense water of one-level is continued to feed two-pass reverse osmosis device 14 carry out reverse-osmosis treated from dense water tank 13, the water quality utilized that obtains is fed return water tank 15, the dense water of secondary is fed wastewater trough 16.
In above-described embodiment, we adopt secondary mould separation system to carry out the water quality separation, it will be understood by those skilled in the art that also to comprise reverse osmosis system more than three grades.
At the above-mentioned coking wastewater processing system that proposes, a kind of coking waste water treatment method that the embodiment of the invention proposes is implemented as follows, and referring to method flow diagram shown in Figure 2, this method comprises the steps:
S1, in advance high voltagehigh frequency pulse electro-flocculation device is debugged;
Before system moves, need debug high voltagehigh frequency pulse electro-flocculation device, to grasp the basic parameter of this device, guarantee that this device is in the working order an of the best.
S2, by water pump the waste water in the water collecting basin is fed high voltagehigh frequency electricity flocculation plant and carry out electrolytic separation;
S3, the water quality that will come out from high voltagehigh frequency electricity flocculation plant cushion through Buffer Pool, precipitate through settling tank again, obtain first water quality treatment;
S4, the pollutent that is settled out is carried out Timing Processing;
Described processing can be for entering sewer catch basin with described pollutent, again by sludge pump with pollutent suction mud thickener etc., described timing can select reasonable time to carry out Pollutant Treatment according to test result, for example carries out primary treatment in per 4 hours.
S5, described first water quality treatment is handled through described ultra-filtration membrane refining plant, obtained second water quality treatment;
S6, described second water quality treatment is fed the UF pond;
S7, connect the backwashing pump established by the UF pond and extract part second water quality treatment described ultra-filtration membrane refining plant is carried out backwash, to guarantee the unimpeded of described ultra-filtration membrane refining plant film silk, the water quality after backwash feeds Buffer Pool, repeats S3;
S8, connect the high-pressure pump of establishing by the UF pond the described second water quality treatment suction reverse osmosis system of part is carried out reverse-osmosis treated, obtain to utilize water quality and residue waste water;
Described reverse osmosis system can be two-pass reverse osmosis device or multistage reverse osmosis unit, and the water quality that feeds is carried out twice or reverse-osmosis treated repeatedly.Institute's act reverse osmosis system comprises the two-pass reverse osmosis device in the embodiment of the invention, and the description of carrying out treating processes through reverse osmosis system can be referring to the description of components of system as directed, does not do at this and gives unnecessary details.
S9, utilize water quality to feed return water tank to reclaim use with described;
S10, described residue waste water is handled.
Description by technique scheme, coking wastewater processing system proposed by the invention, utilize high voltagehigh frequency pulse electric coagulation device, adopt the electrolytic process of high-voltage, little electric current to realize the organic or inorganic thing in the waste water is carried out redox reaction, and then condense, float and remove, pollutent is separated from water, simultaneously, the present invention also further purifies water quality in conjunction with the UF device and separates, by the present invention, can realize good Treatment of Coking Effluent effect, and working cost is low, non-secondary pollution, easy handling management simultaneously.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a coking wastewater processing system is characterized in that, comprising:
The electricity that is used for the filtered wastewater scum silica frost coagulates processing module;
Be used for and carry out pre-treatment by the effluent quality that electricity coagulates processing module, to reach the pre-processing module of reverse osmosis requirement;
Be used for carrying out the reverse osmosis module of reverse-osmosis treated;
Described electricity coagulates the settling pond that processing module comprises the high voltagehigh frequency pulse electro-flocculation device of the pollutent of branch in dried up, the Buffer Pool that cushions, the settling tank that precipitates and regulates the pH value of water quality; Described pre-processing module comprises ultra-filtration membrane refining plant, UF pond and the Scale inhibitors chemicals dosing plant that stoste is purified, separates and concentrate; Described reverse osmosis module comprises strainer and reverse osmosis system.
2. system according to claim 1 is characterized in that, also comprises the recycling module that can utilize water quality be used to reclaiming.
3. system according to claim 1 is characterized in that, described reverse osmosis system comprises secondary or multistage reverse osmosis unit.
4. system according to claim 1 is characterized in that, described pre-processing module also comprises the backwash device.
5. system according to claim 4 is characterized in that, described backwash device comprises backwashing pump, backwash bag filter and air compressor machine.
6. a coking waste water treatment method is characterized in that, comprising:
Adopt the electrolytic process of high-voltage, little electric current to realize the organic or inorganic thing in the waste water is carried out redox reaction through high voltagehigh frequency pulse electro-flocculation device waste water, and then condense, float and remove, pollutent is separated from water, and obtain first water quality treatment through buffering, post precipitation;
Described first water quality treatment is handled through described ultra-filtration membrane refining plant, obtained second water quality treatment;
Described second water quality treatment is fed the UF pond;
Connect backwashing pump extraction part second water quality treatment of establishing by the UF pond described ultra-filtration membrane refining plant is carried out backwash, to guarantee the unimpeded of described ultra-filtration membrane refining plant film silk, water quality after backwash feeds Buffer Pool and cushions again, precipitates through settling tank again;
Connect the high-pressure pump of establishing by the UF pond described second water quality treatment of part is carried out reverse-osmosis treated, obtain to utilize water quality and residue waste water quality; Reclaim described utilize water quality and to the residue waste water handle.
7. method according to claim 6 is characterized in that, described with waste water before high voltagehigh frequency pulse electro-flocculation device separates, also comprise in advance high voltagehigh frequency pulse electro-flocculation device debugged.
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| CN 201010177971 CN102249466B (en) | 2010-05-20 | 2010-05-20 | System and method for treating wastewater |
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|---|---|---|---|
| CN 201010177971 CN102249466B (en) | 2010-05-20 | 2010-05-20 | System and method for treating wastewater |
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| CN102249466A CN102249466A (en) | 2011-11-23 |
| CN102249466B true CN102249466B (en) | 2013-09-04 |
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| CN102616962B (en) * | 2012-03-30 | 2015-05-06 | 中国石油化工股份有限公司 | Deep stage treatment method for industrial wastewater |
| CN103570166A (en) * | 2012-08-03 | 2014-02-12 | 成都市思博睿科技有限公司 | Recycled water production device based on electrolysis and osmotic membrane technology |
| CN105084613A (en) * | 2015-08-10 | 2015-11-25 | 厦门世达膜科技有限公司 | Industrial wastewater zero discharging technology for phytoextraction industry |
| CN105731694B (en) * | 2015-12-30 | 2018-09-18 | 广东威迪科技股份有限公司 | Spray painting cleaning wastewater treatment and renovation system and method |
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Non-Patent Citations (1)
| Title |
|---|
| 汤小乐等.污水及循环水回用成套处理技术.《中国水污染治理技术装备论文集》.2008,(第十五期),130-134. * |
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Effective date of registration: 20200724 Address after: Room 4, 828 Xueyuan Road, Bacheng Town, Kunshan, Suzhou, Jiangsu Province Patentee after: Kunshan Fengmeng ventilation and environmental protection equipment Co.,Ltd. Address before: 215000, 285, Xiang Xiang Road, Suzhou, Kunshan, Jiangsu Patentee before: KUNSHAN MING KUAN ENVIRONMENTAL & ENERGY SAVING TECH Co.,Ltd. |
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