CN106746137A - Magnetic separation method and device for treating oil-containing graphite wastewater - Google Patents
Magnetic separation method and device for treating oil-containing graphite wastewater Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 62
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000010439 graphite Substances 0.000 title claims abstract description 38
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 38
- 238000007885 magnetic separation Methods 0.000 title abstract description 10
- 230000005291 magnetic effect Effects 0.000 claims abstract description 160
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 230000008569 process Effects 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 20
- 238000007790 scraping Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 7
- 238000010992 reflux Methods 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 53
- 238000004140 cleaning Methods 0.000 claims description 30
- 238000000746 purification Methods 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000000725 suspension Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 8
- 238000005188 flotation Methods 0.000 claims description 7
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000010734 process oil Substances 0.000 claims description 7
- 238000005189 flocculation Methods 0.000 claims description 6
- 230000016615 flocculation Effects 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 4
- 239000003925 fat Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000013528 metallic particle Substances 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
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- 238000013461 design Methods 0.000 description 4
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- 239000003814 drug Substances 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
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- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 1
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- 239000010419 fine particle Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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- 238000010327 methods by industry Methods 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
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Classifications
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
-
- 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
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a magnetic separation method for treating oily graphite wastewater, which adopts a combined air floatation and magnetic separation process to treat oil and suspended substances in the oily graphite wastewater. A. Firstly, adding wastewater into an air floatation tank, floating part of suspended matters such as oil, graphite and the like in the wastewater out of the water surface, scraping the suspended matters into a slag groove by a slag scraper, wherein the air floatation adopts an internal circulation type jet pressurized dissolved air floatation method, the dissolved air pressure is 0.25-0.4 MPa, the reflux ratio is 10-15%, and the separation load is 10-13 m3/m2H, the retention time is 20-30 min; B. the air-floated effluent is sent into a magnetic separation device, enters a pre-magnetic processor in the magnetic separation device for pre-magnetization, and then sewage is pollutedThe method comprises the following steps that water enters an inclined tube sedimentation tank, the flow rate of the inclined tube sedimentation tank is controlled to be 20-35 mm/s, then a magnetic disc separator adsorbs residual floccules and suspended matters in the water onto a magnetic disc, and wastewater flowing through a single magnetic disc separator is controlled to be 200-400 m3And h, scraping the sludge into a sludge discharge device by a sludge scraper, and discharging the treated clear water from a water outlet. Does not add water treatment agent, and is suitable for treating sewage which contains oil and graphite and is not easy to naturally precipitate.
Description
Technical field
The present invention relates to water-treatment technology field, more particularly to a kind of magnetism separate method and device for processing oil-bearing graphite waste water.
Background technology
In Seamless Tube Plant hot rolling seamless steel pipe production process, need to add high temperature aqueous-based core rod lubricant agent to produce lubrication for seamless pipe poling, its main component aquadag mixes with shower water in milling train cooling and enters circulation, causes circulation water suspension content exceeded；Cooling water can also under band a certain amount of lubricating oil, hydraulic oil in cooling procedure is rolled, the effect such as sodium tripolyphosphate, sodium lignin sulfonate, dispersant, anti-settling agent is emulsified in high temperature aqueous-based core rod lubricant agent, more stable oil-bearing graphite waste water is formed, is difficult to remove using common horizontal sedimentation tank；Simultaneously, the materials such as iron scale, dust are rinsed in the operation of rolling, in system operation, greasy filth can be formed in water, if the recirculated water not to graphitiferous, oil is effectively treated, greasy filth etc. can block chilling spray head, dirt is formed in water wall, serious to reduce cooling effect, the normal of influence cooling system is used, so as to influence normal production.So, to the treatment of oil-bearing graphite rolling effluent, separate the key that graphite, grease and metal oxide are its handling process.
Because oily waste water is big to environmental hazard, many administering methods are developed for many years, but because the species of greasy dirt is more, the property of pollution source is complicated, and discharge capacity is big, and processing requirement is high, and huge difficulty and pressure is brought to the improvement of oily waste water.Conventional processing method is divided into Physical, chemical method and bioanalysis at present.Physical is to process oils, such as precipitation method, Bubble-floating Method, filtration method, embrane method, Magneto separate using physical action；Chemical method processes the oil emulsion in waste water, such as coagulant sedimentation, acidization by the effect being demulsified；Bioanalysis is to be removed the micelle shape oil droplet in waste water and dissolved oil using the effect of microorganism, such as activated sludge process, biomembrance process, anaerobic bio-treated.
For the waste water containing magnetisable materials such as iron scales in suspension, due to that with ferromagnetic material, can be removed by magnetization.For the oils in waste water and other namagnetic substances, pre- magnetic technology can be used, it is combined together with magnetisable material, removed with magnetic-adsorption, and for general waste water, magnetic material can be added to process sewage.Around this principle, people develop some separation methods and equipment successively.
As the A of patent CN 103183442 are disclosed a kind of " greasy filth Magneto separate water technology ", the method is on the basis of common coagulant precipitation sewage treatment process, addition iron ore powder, reach the purpose of optimization processing effect, but the method needs to add Iron Ore Powder on the basis of chemical reagent is added, simultaneously the method in engineering is processed waste water not by premagnetization, to Magneto separate effect discount.
The A of patent CN 1074198 disclose a kind of " permanent magnet separation for the treatment of steel plant wastewater " and the U of CN 201442879 are disclosed a kind of " double magnetically separating and purifying waste fitments ", although these devices have magnetic intensity high, gradient is big, disposal ability is big, the advantages of separating effect is high, but there is also some problems, such as use above-mentioned magnetic purification apparatus, retain a percentage of the total profits for the enterprise's own use in magnetic separator the time due to sewage short, short grained ferromagnetic material is difficult to be adsorbed, cause purification efficiency low, water outlet does not reach production requirement, and oils is precipitated, the effect of absorption is also limited.Therefore, these method and apparatus are not suitable for the larger actual conditions of the oil-containing of Seamless Tube Plant oil-bearing graphite waste water, graphitiferous concentration.
Patent CN 201485341 is disclosed " a kind of permanent magnet type magnetic separation sewage disposal ", the patent processes waste water to addition chemical floc in waste water and magnetized magnetic, large-scale wastewater treatment is particularly well-suited to, and can directly process high temperature sewage, Magneto separate efficiency high.But the method needs to add PAC and magnetic, needs constantly to put into medicament during use, relatively costly.
The A of patent CN 101301637 disclose " magnetic separation filtration purification apparatus ", and a kind of magnetic separation filtration purification apparatus for being related to Magneto separate of the patented invention purify dirty water purifying means.The invention mainly utilizes magnetic flocculate of the permanent magnet in absorption effluent before and after filter element, the treatment load of filter element is significantly reduced, is conducive to working long hours for filter element, but the method to need to add chemical floc and filter membrane, it is relatively costly, it is adapted to the sewage disposal of low discharge.
The A of patent CN 103265044 are disclosed " method of magazine iron in flocculation-Magneto separate removal water glass solution ", the method which disclose magazine iron in a kind of removal water glass solution using flocculation-Magneto separate, the step such as including stirring mixing, flocculation, Magneto separate, neutralization, secondary Magneto separate.The method is needed to add modified Nano ferroso-ferric oxide, and ferro-aluminum flocculation aid and polyacrylamide flocculant are added when the removal of impurity is gone, and follow-up input is big.
The A of patent CN 101913685 disclose " a kind of novel magnetic separation sewage treatment unit ", a kind of novel magnetic separation sewage treatment unit of the patented invention.The device is mainly groove pond, and groove pond is segmented into regulation stirring pool, dividing plate flocculation basin, Magneto separate sedimentation basin and horizontal sedimentation tank.Heavy magnetic kind is added by the sewage for entering groove pond, raising proportion is combined with flco little particle and is accelerated precipitation under the influence of a magnetic field, shorten the sedimentation time.But the method treatment effect is limited, it is necessary to be used cooperatively with other method.
The A of patent CN 102060350 are disclosed " a kind of oily waste water advanced treatment process method ", and the patent is constituted by adsorbing and regenerating two systems：Adsorption system is made up of a series of adsorption tower group that multicolumns for realizing parallel running are connected, and the alternately low concentration 30~50mg/L oil-containings water outlet to traditional handicraft carries out advanced treating, and adsorbent is the sorbing materials such as modified coal ash, activated carbon, expanded graphite；After this group of adsorption tower adsorption saturation, this group of adsorption tower is switched into bioregenerative system carries out in-situ regeneration.The method adsorption effect stabilization, high treating effect, but the microbial activity of regenerative process is unstable, and adsorption time is more long.
The U of patent CN 202729850 are disclosed " one kind cinder adsorption oily waste water device ", and the patent is used and invented a kind of device of use cinder adsorption oily waste water.Cinder is paved into cinder layer using drive device, oily waste water is from bottom to top flowed into cinder layer from cinder adsorption pond, the oil contaminants of oily waste water is effectively adsorbed by cinder, cinder can automatically fall drag-out slag car feeding boiler combustion by tapping mechanism；The oily waste water supernatant water adsorbed by cinder layer flows into overflow groove, then is discharged by precipitation.The method simple structure, easy to operate, operating cost is low, but adsorption effect is undesirable, it is necessary to successive depths are processed.
《Industrial water and waste water》Disclose " a kind of design of combined oil removing equipment ", author：Zou Zhifang, Luo Kuiyuan, Nie Yanqiu, 2005,36 (2):69-71.This article devises a kind of combined oil removing equipment using integrated approach, the characteristics of it combines vertical baffle point oil process, honeycomb inclined-tube point oil process, magnetic grain media method, combines waste oil circular treatment.Operation result shows that the content of water outlet oil is less than 1mg/L, and treatment effect is good.But the method floor space is big, and complex operation, operating cost is high.
《Chinese water supply and drainage》Disclose " application of the super Magneto separate water body purification technology in northern river sewage treatment plant ", author：Zhou Jianzhong, Jin Yunhui, Luo Benfu, Zhou Wenbin, Zhousheng are skilful, and 2012,28 (6):78-81.Related articles process engineering and are described to the northern river sewage treatment plant second phase primary reinforcement using super Magneto separate water body purification technology, and operation principle and technical characterstic to super Magneto separate water body purification treatment technology is analyzed.The application needs to add magnetic kind, and without deoiling function.
《Shanghai communications university's journal》Disclose " high-gradient magnetically separating treatment oily waste water " Yao Yedong, Qian Xueling, Li Daotang, Lin Weiping, 2003,37 (11):1791-1794.Related articles have studied the principle and process conditions that oily waste water is processed using high-gradient magnetically separating, the influences of the factor to deoiling effect such as magnetic addition, magnetic induction intensity, mixing time, addition flocculant, regulation pH value are discussed, and recommends technological parameter.But this article only discuss the processing method to oils, without reference to the removal situation of suspension.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of magnetism separate method and device for processing oil-bearing graphite waste water, and this kind of technique can effectively remove oils and suspension in oil-bearing graphite waste water, be not added with any medicament, reduce system operation cost.Reach the purpose of circulating and recovering.Oil content and suspension content meet in processed waste water《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And《GB13456-2012 steel and iron industry pollution discharge standards》In to suspension and the emission request of petroleum-type.
To achieve the above object, the present invention is realized using following technical scheme：
A kind of magnetism separate method for processing oil-bearing graphite waste water, using oil, suspended material in air supporting and Magneto separate group technology treatment oil-bearing graphite waste water, specifically includes following steps：
A in), adding waste water into flotation tank first, the suspension gas such as the part oils and graphite in waste water are emerged through air-floating apparatus, scraped into slag chute by Slag Scraping Device, air supporting uses internal-circulation type jet method of pressed dissolved-air release, dissolved-air pressure is 0.25~0.4MPa, reflux ratio is 10%~15%, and segregational load is 10~13m3/m2H, the residence time is 20~30min；
B magnetic separating device), is sent into air supporting water outlet, into the pre- magnetic processor premagnetization in magnetic separating device, the middle pre- magnetic processor from below intake chamber of waste water enters, waste water is by the permanent magnet block premagnetization in pre- magnetic processor when flowing through pre- magnetic processor, the materials containing magnetic such as the tiny iron metallic particles in sewage are magnetized flocculation, graphite particle and oil or fat particles are bonded simultaneously, form floccule body, subsequent sewage enters tube settler, sediment fraction floccule body, tube settler flow control in 20~35mm/s, in sludge bucket by discharge pipeline through mud discharging mouth discharged by precipitating sludge；It is semicircular disk tank that tube settler water outlet enters section, magnetic disk separator is placed along tank, magnetic disk separator is constantly rotated by motor belt motor movable magnetic disc decoupler shaft, disk in magnetic disk separator is adsorbed on disk remaining floccule body in water and suspension by the magnetic field of high intensity and high magnetic field gradients, and the waste water for flowing through single magnetic disk separator is controlled in 200~400m3/ h, the cleaning shoe bar both sides on cleaning shoe are close to magnetic disk separator disk and sludge scraping are entered into mud discharging device, and are discharged through slag-drip opening, and the clear water after treatment is discharged by delivery port, and this process is constantly repeated with the continuous circulation of recirculated water, finally can qualified discharge.
A kind of magnetic separating device for processing oil-bearing graphite waste water, including main body rack, intake chamber is set on main body rack, intake chamber connects purification water tank, purification water tank connects two semicircle disk tanks of parallel connection, disk tank connects delivery port, intake chamber central bottom is provided with the pre- magnetic processor of downward water outlet, mouth connection purification water tank under pre- magnetic processor, tube settler is provided with purification water tank, purification water tank bottom is provided with sludge bucket, discharge pipeline is provided with sludge bucket, magnetic disk separator is provided with disk tank, magnetic disk separator is driven by motor and rotated, mud-scraping apparatus and mud discharging device are provided with outside magnetic disk separator.
Pre- magnetic processor is hollow rectangle Cylinder wall structure, 3~6 strip magnetic holders are set in stainless steel barrel on vertical direction, pre- magnetic separator is divided into several oblong channels, magnetic holder is supported by magnetic holder bearing support, each magnetic holder inner homogeneous is distributed rectangle nanoscale Nd-Fe-B permanent magnetic magnetic patch, magnetic patch outer wrap stainless steel casing, and the magnetic patch the two poles of the earth in magnetic holder are reversed.
Each disk above magnetic disk separator joins end to end to form an entirety vertically, helical pattern, space is provided between spiral disk, magnetic patch on disk is arranged in poly- magnetic mode, poly- magnetic patch is in NN or SS repeated arrangements, and arrangement is repeated in along helical form card, disk is made up of the stainless steel casing that middle nanoscale Nd-Fe-B permanent magnetic magnetic patch and outside are wrapped up.
Mud-scraping apparatus include sprocket wheel, chain, cleaning shoe, chain is connected on the sprocket wheel of two ends fixation, cleaning shoe is fixed on chain, form ring-type cleaning shoe, the side cleaning shoe bar of ring-type cleaning shoe stretches into the space inner close fitting disk of the spiral disk of magnetic disk separator, and with the rotation of magnetic disk separator, cleaning shoe is moved horizontally under the promotion of spiral disk, so as to band movable sprocket is rotated, i.e., annular cleaning shoe is rolled with the rotation of magnetic disk separator.
Compared with prior art, the beneficial effects of the invention are as follows：
Flotation tank oil removal rate of the present invention is general more than 40% in the case where flocculant is not added with.Because waste water axially flows along magnetic disk separator in disk tank, waste water is greatly increased with the disk contact time compared with other devices for flowing radially through magnetic disk separator, is conducive to the absorption of fine particle suspension.
The invention provides the method and apparatus that a kind of air supporting and Magneto separate group technology process oil-bearing graphite waste water.The oil-bearing graphite waste water of Seamless Tube Plant is by after present invention treatment, water quality meets《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And《GB13456-2012 steel and iron industry pollution discharge standards》In to suspension and the emission request of petroleum-type.The method is adapted to treatment oil-containing, the sewage for being difficult natural sedimentation of graphitiferous without water treatment agent, and investment and operating cost are relatively adapted to the application of Practical Project, are conducive to the energy-saving and emission-reduction of enterprise to work.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the side view of magnetic disk separator and disk tank.
Fig. 4 is the structural representation of mud-scraping apparatus.
Fig. 5 is the structural representation of cleaning shoe.
In figure：The 1- intake chamber 2- magnetic holder 3- tube settler 4- motor 5- magnetic disk separator axle 6- magnetic disk separator 7- disk 8- mud-scraping apparatus 9- mud discharging device 10- delivery ports pre- magnetic processor 12- purification water tanks 13- discharge pipelines 14- main stands 15- mud discharging mouths 16- disks tank 17- slag-drip openings 18- sludge buckets 19- sprocket wheels 20- chains 21- cleaning shoes 22- cleaning shoe bars of 11-
Specific embodiment
Specific embodiment of the invention is further illustrated below in conjunction with the accompanying drawings：
As Figure 1-3, a kind of magnetic separating device for processing oil-bearing graphite waste water, including main body rack 14, intake chamber 1 is set on main body rack 14, intake chamber 1 connects purification water tank 12, purification water tank 12 connects two semicircle disk tanks 16 of parallel connection, disk tank 16 connects delivery port 10, the central bottom of intake chamber 1 is provided with the pre- magnetic processor 11 of downward water outlet, 11 times mouth connection purification water tanks 12 of pre- magnetic processor, tube settler 3 is provided with purification water tank 12, the bottom of purification water tank 12 is provided with sludge bucket 18, discharge pipeline 13 is provided with sludge bucket 18, magnetic disk separator 6 is provided with disk tank 16, magnetic disk separator 6 drives rotation by motor 4, mud-scraping apparatus 8 and mud discharging device 9 are provided with outside magnetic disk separator 6.
Pre- magnetic processor 11 is hollow rectangle Cylinder wall structure, 3~6 strip magnetic holders 2 are set in stainless steel barrel on vertical direction, pre- magnetic separator is divided into several oblong channels, magnetic holder 2 is supported by magnetic holder bearing support, each inner homogeneous of magnetic holder 2 is distributed rectangle nanoscale Nd-Fe-B permanent magnetic magnetic patch, magnetic patch outer wrap stainless steel casing, and the magnetic patch the two poles of the earth in magnetic holder 2 are reversed.
Each disk 7 above magnetic disk separator 6 joins end to end to form an entirety vertically, helical pattern, space is provided between spiral disk, magnetic patch on disk 7 is arranged in poly- magnetic mode, poly- magnetic patch is in NN or SS repeated arrangements, and arrangement is repeated in along helical form card, disk 7 is made up of the stainless steel casing that middle nanoscale Nd-Fe-B permanent magnetic magnetic patch and outside are wrapped up.
As illustrated in figures 4-5, mud-scraping apparatus include sprocket wheel 19, chain 20, cleaning shoe 21, chain 20 is connected on the sprocket wheel 19 of two ends fixation, cleaning shoe 21 is fixed on chain 20, form ring-type cleaning shoe 21, the side cleaning shoe bar 22 of ring-type cleaning shoe 21 stretches into the space inner close fitting disk 7 of the spiral disk of magnetic disk separator 6, with the rotation of magnetic disk separator 6, cleaning shoe 21 is moved horizontally under the promotion of spiral disk, so as to band movable sprocket 19 is rotated, i.e., annular cleaning shoe 21 is rolled with the rotation of magnetic disk separator 6.
The processing procedure of oil-bearing graphite waste water：By in waste water feeding pressurized dissolved air flotation pond, the intake chamber 1 in magnetic separating device is sent into air supporting water outlet after air-flotation process, enter purification water tank 12 by the pre- magnetic processor 11 in the middle of intake chamber 1, in the presence of magnetic holder 2 in pre- magnetic processor 11, premagnetization is carried out to waste water, along with the stirring action of current, the material containing magnetic such as the ferrous metal particle in sewage carries out magnetic flocculation, graphite particle and oil or fat particles are bonded simultaneously, form floccule body.Subsequent sewage enters tube settler 3, and sediment fraction floccule body, precipitating sludge is discharged by discharge pipeline 13 in sludge bucket 18 through mud discharging mouth 15.It is semicircular tank 16 that the water outlet of tube settler 3 enters section, and magnetic disk separator 6 is set along tank 16, and magnetic disk separator 6 drives magnetic disk separator axle 5 constantly to rotate by motor 4.The disk 7 being made up of nanoscale Nd-Fe-B permanent magnet material in magnetic disk separator 6 is adsorbed on disk 7 remaining floccule body in water and suspension by the magnetic field of high intensity and high magnetic field gradients, these sludge scrapings are entered mud discharging device 9 by the disk 7 that magnetic disk separator 6 is close in the both sides of zigzag cleaning shoe bar 22 on cleaning shoe 21, and discharged through slag-drip opening 17, the clear water after treatment is discharged by delivery port 10.This process is constantly repeated with the continuous circulation of recirculated water, finally can qualified discharge.
Embodiment 1
A kind of magnetism separate method for processing oil-bearing graphite waste water is as follows：
In the oil-bearing graphite waste water feeding pressurized dissolved air flotation pond that by oil content be 49.7mg/L, total suspended matter is 196.3mg/L, dissolved-air pressure is 0.30MPa, and reflux ratio is 15%, and segregational load is 13m3/m2H, hydraulic detention time is 30min, the oils of removal about 40%；The intake chamber 1 in magnetic separating device is sent into air supporting water outlet after air-flotation process, enter purification water tank 12 by the pre- magnetic processor 11 in the middle of intake chamber 1, waste water after premagnetization flocculates in purification water tank 12, the subsequent sediment fraction floccule body in tube settler 3, the flow velocity of tube settler 3 is 25mm/s, and water outlet enters tank 16, under the magnetic fields of magnetic disk separator 6, by remaining floccule body in water and suspension absorption on disk 7, separate unit magnetic disc separation unit capacity is 400m3/ h, the clear water after treatment is recycled in discharging feeding recirculated water by delivery port 10, and after continuously running several times, circulating water quality is gradually settled out, and reaches discharge standard.
Embodiment 2
A kind of magnetism separate method for processing oil-bearing graphite waste water is as follows：
In the oil-bearing graphite waste water feeding pressurized dissolved air flotation pond that by oil content be 49.7mg/L, total suspended matter is 196.3mg/L, dissolved-air pressure is 0.25MPa, and reflux ratio is 10%, and segregational load is 10m3/m2H, hydraulic detention time is 20min, the oils of removal about 40%；The intake chamber 1 in magnetic separating device is sent into air supporting water outlet after air-flotation process, enter purification water tank 12 by the pre- magnetic processor 11 in the middle of intake chamber 1, waste water after premagnetization flocculates in purification water tank 12, the subsequent sediment fraction floccule body in tube settler 3, the flow velocity of tube settler 3 is 20mm/s, and water outlet enters tank 16, under the magnetic fields of magnetic disk separator 6, by remaining floccule body in water and suspension absorption on disk 7, separate unit magnetic disc separation unit capacity is 300m3/ h, the clear water after treatment is recycled in discharging feeding recirculated water by delivery port 10, and after continuously running several times, circulating water quality is gradually settled out, and reaches discharge standard.
Embodiment 3
A kind of magnetism separate method for processing oil-bearing graphite waste water is as follows：
In the oil-bearing graphite waste water feeding pressurized dissolved air flotation pond that by oil content be 49.7mg/L, total suspended matter is 196.3mg/L, dissolved-air pressure is 0.35MPa, and reflux ratio is 12%, and segregational load is 11m3/m2H, hydraulic detention time is 25min, the oils of removal about 40%；The intake chamber 1 in magnetic separating device is sent into air supporting water outlet after air-flotation process, enter purification water tank 12 by the pre- magnetic processor 11 in the middle of intake chamber 1, waste water after premagnetization flocculates in purification water tank 12, the subsequent sediment fraction floccule body in tube settler 3, the flow velocity of tube settler 3 is 20mm/s, and water outlet enters tank 16, under the magnetic fields of magnetic disk separator 6, by remaining floccule body in water and suspension absorption on disk 7, separate unit magnetic disc separation unit capacity is 250m3/ h, the clear water after treatment is recycled in discharging feeding recirculated water by delivery port 10, and after continuously running several times, circulating water quality is gradually settled out, and reaches discharge standard.
In above-described embodiment, the circulating water quality measurement result after treatment as shown in table 1, as a result shows that the method can effectively remove the oils and suspension in waste water, reaches《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And《GB13456-2012 steel and iron industry pollution discharge standards》Emission request.
Each embodiment of table 1 is to oils and the removal effect of suspension
Described above is only general principle of the invention, and not the present invention is imposed any restrictions, every that equivalent variations and modification are carried out to it according to the present invention, within the category of the art of this patent protection scheme.
Claims (5)
1. it is a kind of process oil-bearing graphite waste water magnetism separate method, it is characterised in that use air supporting and Magneto separate group technology
Oil, suspended material in treatment oil-bearing graphite waste water, specifically include following steps：
A in), adding waste water into flotation tank first, through air-floating apparatus by suspensions such as the part oils and graphite in waste water
Gas emerges, and is scraped into slag chute by Slag Scraping Device, and air supporting is using internal-circulation type jet method of pressed dissolved-air release, dissolved-air pressure
0.25~0.4MPa, reflux ratio is 10%~15%, and segregational load is 10~13m3/m2H, the residence time is 20~30min；
B magnetic separating device), is sent into air supporting water outlet, into the pre- magnetic processor premagnetization in magnetic separating device, waste water is from entering
Pre- magnetic processor in the middle of below tank enters, and waste water is pre- by the permanent magnet block in pre- magnetic processor when flowing through pre- magnetic processor
The materials containing magnetic such as magnetic, the tiny iron metallic particles in sewage are magnetized flocculation, while bonding graphite particle and oil or fat particles, shape
Into floccule body, subsequent sewage enters tube settler, sediment fraction floccule body, and tube settler flow control is 20~35
Mm/s, precipitating sludge is discharged by discharge pipeline in sludge bucket through mud discharging mouth；It is semicircular that tube settler water outlet enters section
Disk tank, magnetic disk separator is placed along tank, and magnetic disk separator is constantly rotated by motor belt motor movable magnetic disc decoupler shaft, disk
Disk in separator is adsorbed in magnetic remaining floccule body in water and suspension by the magnetic field of high intensity and high magnetic field gradients
On disk, the waste water for flowing through single magnetic disk separator is controlled in 200~400m3It is close to/h, the cleaning shoe bar both sides on cleaning shoe
Sludge scraping is entered mud discharging device by magnetic disk separator disk, and is discharged through slag-drip opening, and the clear water after treatment is discharged by delivery port, this
Process is constantly repeated with the continuous circulation of recirculated water, finally can qualified discharge.
2. it is a kind of process oil-bearing graphite waste water magnetic separating device, it is characterised in that including main body rack, on main body rack
Intake chamber, intake chamber connection purification water tank, purification water tank are set and connect two semicircle disk tanks of parallel connection, disk tank
Connection delivery port, intake chamber central bottom is provided with the pre- magnetic processor of downward water outlet, mouth connection purification water tank under pre- magnetic processor,
Tube settler is provided with purification water tank, purification water tank bottom is provided with sludge bucket, discharge pipeline, disk tank are provided with sludge bucket
In be provided with magnetic disk separator, magnetic disk separator is driven by motor and rotated, and mud-scraping apparatus and spoil disposal dress are provided with outside magnetic disk separator
Put.
3. it is according to claim 2 it is a kind of process oil-bearing graphite waste water magnetic separating device, it is characterised in that it is described
Pre- magnetic processor be hollow rectangle Cylinder wall structure, in stainless steel barrel on vertical direction set 3~6 strip magnetic holders,
Pre- magnetic separator is divided into several oblong channels, magnetic holder is supported by magnetic holder bearing support, each magnetic holder inner homogeneous distribution length
Square nanoscale Nd-Fe-B permanent magnetic magnetic patch, magnetic patch outer wrap stainless steel casing, and the magnetic patch the two poles of the earth in magnetic holder are reversed.
4. it is according to claim 2 it is a kind of process oil-bearing graphite waste water magnetic separating device, it is characterised in that it is described
Magnetic disk separator above each disk join end to end to be formed vertically and set between an entirety, helical pattern, spiral disk
Have space, the magnetic patch on disk is arranged in poly- magnetic mode, poly- magnetic patch be in NN or SS repeated arrangements, and along helical form card according to
Secondary repeated arrangement, disk is made up of the stainless steel casing that middle nanoscale Nd-Fe-B permanent magnetic magnetic patch and outside are wrapped up.
5. it is according to claim 2 it is a kind of process oil-bearing graphite waste water magnetic separating device, it is characterised in that it is described
Mud-scraping apparatus include sprocket wheel, chain, cleaning shoe, chain be connected to two ends fixation sprocket wheel on, cleaning shoe is fixed on chain
On, ring-type cleaning shoe is formed, the side cleaning shoe bar of ring-type cleaning shoe stretches into tight in the space of the spiral disk of magnetic disk separator
Patch disk, with the rotation of magnetic disk separator, cleaning shoe is moved horizontally under the promotion of spiral disk, so that band movable sprocket turns
Dynamic, i.e., annular cleaning shoe is rolled with the rotation of magnetic disk separator.
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| CN201510802459.8A CN106746137A (en) | 2015-11-19 | 2015-11-19 | Magnetic separation method and device for treating oil-containing graphite wastewater |
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| CN201510802459.8A CN106746137A (en) | 2015-11-19 | 2015-11-19 | Magnetic separation method and device for treating oil-containing graphite wastewater |
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