CN109516608A - A kind of advanced treatment process of coking waste water and processing system - Google Patents
A kind of advanced treatment process of coking waste water and processing system Download PDFInfo
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- CN109516608A CN109516608A CN201910005742.6A CN201910005742A CN109516608A CN 109516608 A CN109516608 A CN 109516608A CN 201910005742 A CN201910005742 A CN 201910005742A CN 109516608 A CN109516608 A CN 109516608A
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention provides a kind of advanced treatment process of coking waste water and systems, the technique includes: waste water after activated coke adsorption treatment, coagulant is first added and carries out coagulating treatment, it adds flocculation aid and micro- sand carries out flocculation treatment, the first separation is carried out after flocculation treatment, is purified water and slurry, slurry is successively carried out to second isolated micro- sand, with the isolated activated coke of third, micro- sand and activated coke are recycled respectively.The present invention carries out adsorption treatment to waste water using low-cost activated coke, precipitation process is carried out by adding micro- sand, and activated coke and micro- sand are recycled, it is energy saving, without secondary pollution, entire technological operation is simple, and occupied area is small, investment cost and operating cost, stable effluent quality are saved.
Description
Technical field
The present invention relates to technical field of sewage, and in particular to a kind of advanced treatment process of coking waste water and processing system
System.
Background technique
Coking wastewater is the waste water generated in coal coke, gas purification and coke chemicals removal process, dirt in the waste water
Object complicated component is contaminated, the high-concentration organic industrial waste water compared with bio-refractory is belonged to.It is simple by physics, physical chemistry, chemistry
Method handles coking wastewater, it is difficult to reach discharge standard.
Currently, the treatment process of coking wastewater is functionally divided, be broadly divided into pretreatment system, biological treatment system and
Advanced treatment system.Biological treatment system uses routine biochemistry technique, is discharged the general 200-350mg/L of COD, then reduce difficulty very
Greatly, the residue in water outlet is mainly bio-refractory organic matter.Advanced treatment system mainly has Ozonation, coagulating sedimentation
Method and some such as Fenton reagent methods, electrochemical treatments new method.Wherein ozone generator power consumption is larger, cost compared with
Height, coagulant sedimentation and Fenton oxidation method can generate a large amount of residue, and new pollution can be caused to environment, therefore,
For the efficient advanced treatment process of residual hardly degraded organic substance, it appears very crucial.
For example, Chinese patent CN105254123A discloses a kind of coking advanced waste treatment system and its reuse technology,
The system includes grease removal tank, conditioning tank, biochemistry pool, sedimentation basin, biofilter, more medium filter and adsorbent equipment, also public affairs
The technique for carrying out coking wastewater deep treatment using the system is opened.But the technology still needs to during Treatment of Coking Effluent
Improvement is made in terms of reducing cost, reducing occupied area and improving treatment effeciency, meanwhile, it also needs to avoid in treatment process as far as possible
Generate the chemical sludge that secondary pollution is largely caused to environment.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcome in the prior art coking wastewater deep treatment it is at high cost,
Treatment effeciency is low, the defects of easily causing secondary pollution to environment, to provide a kind of advanced treatment process of coking waste water.
The invention solves another technical problem be to overcome in the prior art coking wastewater deep treatment it is at high cost,
Treatment effeciency is low, the defects of easily causing secondary pollution to environment, to provide a kind of coking advanced waste treatment system.
For this purpose, including the following steps: the present invention provides a kind of advanced treatment process of coking waste water
Activated coke is added into waste water, carries out adsorption treatment, collects single treatment waste water；
Coagulant is added into the single treatment waste water, carries out coagulating treatment, collects secondary treatment waste water；
Flocculation aid and micro- sand are added into the secondary treatment waste water, carries out flocculation treatment；
First separation is carried out to the secondary treatment waste water after flocculation treatment, is purified water and slurry；
Second separation is carried out to the slurry, micro- sand is obtained and except mortar, micro- sand is added to the secondary treatment
In waste water；
To described except mortar carries out third separation, activated coke is collected, and the activated coke is added into the waste water.
Further, the waste water is biochemical secondary clarifier effluent.
Further, the partial size of the activated coke is 0.075-0.3mm, iodine sorption value >=500mg/g.
Further, the coagulant is one or both of aluminium polychloride and bodied ferric sulfate.
Further, the dosage of the coagulant is 30-60mg/L.
Further, in the coagulating treatment, apply stirring, the revolving speed of the stirring is 200-250r/min.
Further, the flocculation aid is polyacrylamide, and the dosage of the polyacrylamide is 1-3mg/L.
Further, the effective grain size of micro- sand is 140-160 μm, nonuniformity coefficient≤1.5.
The effective grain size (d10) of micro- sand are as follows: micro- sand content on the grading curve of micro- sand less than the partial size accounts for micro- sand
10% partial size of gross mass is known as effective grain size.The nonuniformity coefficient (coefficient uniformity, Cu) of micro- sand
Calculation formula is Cu=d60/d10, and wherein d60 is that micro- sand content on the grading curve of micro- sand less than the partial size accounts for micro- sand
60% partial size of gross mass, d10 are that micro- sand content on the grading curve of micro- sand less than the partial size accounts for micro- sand gross mass
10% partial size.
Further, in the flocculation treatment, apply stirring, the revolving speed of the stirring is 25-30r/min.
Further, SiO in micro- sand2Content be not less than 95wt%, the hardness level of micro- sand is not less than
7Mohs。
Further, the dosage of micro- sand is 2-3mg/L.
Furthermore the present invention also provides a kind of coking advanced waste treatment system, including be sequentially communicated setting adsorption tank,
Coagulating basin, flocculation basin and sedimentation basin further include,
Desander, feed inlet are connected to the slurry outlet of the sedimentation basin, and sand export is connected to the flocculation basin；
Coke powder separate tank, the slurry outlet of the desander are connected to the coke powder separate tank, the coke powder separate tank
Coke outlet is connected to the adsorption tank.
Further, the coking advanced waste treatment system further includes coagulant dosage pipe and the coagulant that communicates therewith
Guide pipe, the caliber of the coagulant guide pipe are greater than the caliber of the coagulant dosage pipe；And/or
Waste water inlet, the bottom of pond close to the coagulating basin are set on the side wall of the coagulating basin, the coagulant guiding
The coagulant outlet end of pipe is set in the coagulating basin close to the waste water inlet.
Further, the partition for separating the two is set between the coagulating basin and the flocculation basin, and the partition top opens up
Overflow port, so that the waste water in the coagulating basin is entered in the flocculation basin by the overflow port overflow.
Further, guide shell is set inside the flocculation basin, the guide shell is located at the central location of flocculation basin, described
Blender is set in guide shell.
Further, baffle plate is arranged in the coke powder separate tank.
Further, the sedimentation basin includes the separating inclined plate of both water receiving tank, collection mud cone bucket and segmentation, the water receiving tank
Positioned at the top of the separating inclined plate, the collection mud cone bucket is located at the lower section of the separating inclined plate, so that waste water is from close to described
Collect the side of mud cone bucket by the separating inclined plate, purified water enters the water receiving tank outlet, and the pulp fall of retention is to described
Collect in mud cone bucket；
Further, the bottom of the collection mud cone bucket is arranged the slurry outlet and scrapes mud unit, to scrape mud by described
The slurry that unit will be adhered on the collection mud cone bucket inner wall scrapes and from the slurry outlet outlet.
Technical solution of the present invention has the advantages that
(1) the present invention provides advanced treatment process of coking waste water, and the technique is at low cost, operation stability is high, work
The advantages that skill is simple.The present invention carries out adsorption treatment to biochemical secondary clarifier effluent using low-cost activated coke, and by heavy
Shallow lake pond carries out the separation of water coke, and entire technological operation is simple, and occupation area of equipment is small, has saved investment cost and operating cost, out
Water quality stabilizing.
(2) the present invention provides advanced treatment process of coking waste water, can efficiently be adsorbed to the pollutant in waste water
And precipitating.Activated coke can carry out effectively catching, the grain for the activated coke that the present invention selects to pollutants such as coloration, turbidity in water
Diameter 0.075-0.3mm, iodine sorption value >=500mg/g are also able to achieve the dissolved organic matter that relative molecular weight is 500-1000
Effectively catching；Micro- sand makes pollutant polymerize the wadding body for being easy to precipitate for forming bulky grain under the action of flocculant, to accelerate
Settling velocity of the pollutant in separate tank, in addition, it is 140-160 μm of micro- sand that the present invention, which selects effective grain size, it can be significant
The contact surface area for increasing reaction overcomes difficulty of flocculating due to caused by low temperature, low turbidity.
(3) the present invention provides advanced treatment process of coking waste water, without secondary pollution to environment, by the present invention in that with living
Property coke and micro- sand are handled, and flocculant and dosage of PAC are small, will not generate a large amount of chemical sludges；And the activated coke after adsorbing
It can be sent into blended burning of coal fired boiler after dehydration, be not necessarily to secondary treatment；The activated coke of unadsorbed saturation and micro- sand are in waste water
It is recycled in treatment process.
(4) the present invention provides coking advanced waste treatment systems, and the system operation cost is low, the activity that the present invention uses
Burnt low in cost, the operating cost of wastewater treatment is low；The present invention is realized micro- by being arranged in series desander and coke powder separate tank
Sand and activated coke recycle；Coagulant guide pipe is connected in coagulating basin below coagulant dosage pipe, can ensure medicament
It makes full use of, saves operating cost.The operating cost of present invention process can reduce by 20% compared to traditional handicraft.
(5) the present invention provides coking advanced waste treatment system, which can be with effective guarantee coking wastewater row up to standard
It puts, while saving a large amount of occupied areas, for traditional handicraft, the occupied area of processing system of the present invention is compared to tradition
Technique can save 60%.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of coking advanced waste treatment system provided by the invention；
Appended drawing reference:
1- adsorption tank；11- water inlet；12- feed inlet；13- blender I；2- coagulating basin；21- coagulant dosage pipe；22-
Coagulant guide pipe；23- blender II；3- flocculation basin；31- flocculation aid adds pipe；The micro- sand entrance of 32-；33- guide shell；34- is stirred
Mix device III；4- sedimentation basin；41- inclined plate Disengagement zone；42- water receiving tank；43- outlet conduit；44- wash tub pipe；45- collection mud cone bucket；
46- scrapes mud unit；47- circulating pump；5- desander；6- coke powder separate tank；61- slurry inlet；7- coke powder silo；71- switch valve；
72- conveyer.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar product of the present invention for obtaining, all falls within of the invention
Within protection scope.
Specific experiment step or condition person are not specified in embodiment, according to the literature in the art described routine experiment
The operation of step or condition can carry out.Reagents or instruments used without specified manufacturer, being can be by commercially available acquisition
Conventional reagent product.
Embodiment 1
Present embodiments provide a kind of advanced treatment process of coking waste water, comprising the following steps:
(1) it adsorbs: waste water and activated coke being added into adsorption tank, carry out adsorption treatment, stirring reacts fully, and collects one
Secondary processing waste water, wherein activated coke uses partial size 0.075-0.3mm fine particle, iodine sorption value >=500mg/g；
(2) it flocculates: single treatment waste water, coagulant polymeric aluminium chloride and bodied ferric sulfate being added into coagulating basin, carry out
Coagulating treatment collects secondary treatment waste water, wherein coagulant charging quantity 50mg/L is made anti-with the revolving speed stirring of 250r/min
It should be abundant；
(3) secondary treatment waste water, flocculation aid polyacrylamide and micro- sand are added into flocculation basin, carries out flocculation treatment, with
The revolving speed stirring of 25r/min reacts fully, wherein the dosage of polyacrylamide is 1mg/L, and the dosage of micro- sand is 3mg/
L, the effective grain size (d10) of micro- sand are 150 μm, nonuniformity coefficient (d60/d10)≤1.5, contain SiO in micro- sand2, SiO2Have
It imitates content and is not less than 95%, hardness level is not less than 7Mohs；
(3) it precipitates: the secondary wastewater after flocculation treatment is added to sedimentation basin, is carried out through the inclined plate Disengagement zone in sedimentation basin
First separation, is purified water and slurry, purified water is discharged through water outlet；
(4) eddy flow sub-sand: the isolated slurry of step (3) being added in desander and carries out the second separation, isolated
Micro- sand be added in flocculation basin, it is isolated except mortar is added in coke powder separator；
(5) coke powder separates: to except mortar carries out third separation in coke powder separator, will remove the activated coke in mortar
With pulp separation, the activated coke being partially separated enters in adsorption tank, realizes recycling for activated coke, and residual activity is burnt
Dewatering unit is drained by sludge pump.
It is 183mg/L through the waste water COD before this process through detecting, after this process, through water outlet discharge
Water has reached discharge standard, COD≤50mg/L.
Embodiment 2
Present embodiments provide a kind of advanced treatment process of coking waste water, comprising the following steps:
(1) it adsorbs: waste water and activated coke being added into adsorption tank, carry out adsorption treatment, stirring reacts fully, and collects one
Secondary processing waste water, wherein activated coke uses partial size 0.075-0.3mm fine particle, iodine sorption value >=500mg/g；
(2) it flocculates: single treatment waste water, coagulant polymeric aluminium chloride and bodied ferric sulfate being added into coagulating basin, carry out
Coagulating treatment collects secondary treatment waste water, wherein coagulant charging quantity 35mg/L is made anti-with the revolving speed stirring of 240r/min
It should be abundant；
(3) secondary treatment waste water, flocculation aid polyacrylamide and micro- sand are added into flocculation basin, carries out flocculation treatment, with
The revolving speed stirring of 30r/min reacts fully, wherein the dosage of polyacrylamide is 2mg/L, and the dosage of micro- sand is 2mg/
L, the effective grain size (d10) of micro- sand are 140 μm, nonuniformity coefficient (d60/d10)≤1.5, contain SiO in micro- sand2, SiO2Have
It imitates content and is not less than 95%, hardness level is not less than 7Mohs；
(3) it precipitates: the secondary wastewater after flocculation treatment is added to sedimentation basin, is carried out through the inclined plate Disengagement zone in sedimentation basin
First separation, is purified water and slurry, purified water is discharged through water outlet；
(4) eddy flow sub-sand: the isolated slurry of step (3) being added in desander and carries out the second separation, isolated
Micro- sand be added in flocculation basin, it is isolated except mortar is added in coke powder separator；
(5) coke powder separates: to except mortar carries out third separation in coke powder separator, will remove the activated coke in mortar
With pulp separation, the activated coke being partially separated enters in adsorption tank, realizes recycling for activated coke, and residual activity is burnt
Dewatering unit is drained by sludge pump.
It is 192mg/L through the waste water COD before this process through detecting, after this process, through water outlet discharge
Water has reached discharge standard, COD≤50mg/L.
Embodiment 3
Present embodiments provide a kind of advanced treatment process of coking waste water, comprising the following steps:
(1) it adsorbs: waste water and activated coke being added into adsorption tank, carry out adsorption treatment, stirring reacts fully, and collects one
Secondary processing waste water, wherein activated coke uses partial size 0.075-0.3mm fine particle, iodine sorption value >=500mg/g；
(2) it flocculates: single treatment waste water, coagulant polymeric aluminium chloride and bodied ferric sulfate being added into coagulating basin, carry out
Coagulating treatment collects secondary treatment waste water, wherein coagulant charging quantity 60mg/L is made anti-with the revolving speed stirring of 200r/min
It should be abundant；
(3) secondary treatment waste water, flocculation aid polyacrylamide and micro- sand are added into flocculation basin, carries out flocculation treatment, with
The revolving speed stirring of 30r/min reacts fully, wherein the dosage of polyacrylamide is 3mg/L, and the dosage of micro- sand is 2mg/
L, the effective grain size (d10) of micro- sand are 140 μm, nonuniformity coefficient (d60/d10)≤1.5, contain SiO in micro- sand2, SiO2Have
It imitates content and is not less than 95%, hardness level is not less than 7Mohs；
(3) it precipitates: the secondary wastewater after flocculation treatment is added to sedimentation basin, is carried out through the inclined plate Disengagement zone in sedimentation basin
First separation, is purified water and slurry, purified water is discharged through water outlet；
(4) eddy flow sub-sand: the isolated slurry of step (3) being added in desander and carries out the second separation, isolated
Micro- sand be added in flocculation basin, it is isolated except mortar is added in coke powder separator；
(5) coke powder separates: to except mortar carries out third separation in coke powder separator, will remove the activated coke in mortar
With pulp separation, the activated coke being partially separated enters in adsorption tank, realizes recycling for activated coke, and residual activity is burnt
Dewatering unit is drained by sludge pump.
It is 187mg/L through the waste water COD before this process through detecting, after this process, through water outlet discharge
Water has reached discharge standard, COD≤50mg/L.
Embodiment 4
Present embodiments provide a kind of coking advanced waste treatment system.Referring to Fig.1, which includes being sequentially communicated setting
Adsorption tank 1, coagulating basin 2, flocculation basin 3 and sedimentation basin 4, further include desander 5, the feed inlet of desander 5 and the slurry of sedimentation basin 4
Expect that outlet, the sand export of desander 5 are connected to micro- sand entrance 32 of flocculation basin 3；
The system coke powder separate tank 6, the slurry outlet of desander 5 are connected to coke powder separate tank 6, and coke powder separate tank 6 goes out
Jiao Kou is connected to the feed inlet 12 of adsorption tank 1.
The coagulant guide pipe 22 that coagulating basin 2 is additionally provided with coagulant dosage pipe 21 and communicates therewith, coagulant guide pipe
The caliber that 22 caliber is greater than coagulant dosage pipe 21 can be such that coagulant and waste water is better mixed by the setting, improve mixed
Solidifying effect, it is preferable that the ratio between caliber and the caliber of coagulant dosage pipe 21 of coagulant guide pipe 22 are 2-3:1；Coagulating basin 2
Waste water inlet is set on the side wall of coagulating basin 2, the coagulant outlet end of coagulant guide pipe 22 close to the bottom of pond of coagulating basin 2
It is set in coagulating basin 2 close to waste water inlet, is conducive to coming into full contact with for coagulant and waste water in this way.
Setting separates the partition of the two between coagulating basin 2 and flocculation basin 3, and the partition top opens up overflow port, so that coagulation
Waste water in pond 2 is entered in flocculation basin 3 by the overflow port overflow；Setting guide shell 33 inside flocculation basin 3, guide shell 33
In setting blender III 34 in the central location of flocculation basin 3, the guide shell 33；Coke powder separate tank 6 is provided with baffle plate.
Separating inclined plate area 41 of the sedimentation basin 4 including both water receiving tank 42, collection mud cone bucket 45 and segmentation, water receiving tank 42, which is located at, divides
Top from inclined plate area 41, collection mud cone bucket 45 are located at the lower section in separating inclined plate area 41, so that waste water is from close to collection mud cone bucket 45
Side is by separating inclined plate area 41, and purified water enters 42 outlet of water receiving tank, and the pulp fall of retention is into collection mud cone bucket 45；Collect mud
The bottom of cone bucket 45 is arranged slurry outlet and scrapes mud unit 46, and specifically, scraping mud unit 46 is mud scraper, and mud scraper can will adhere to
It scrapes and in the slurry on collection 45 inner wall of mud cone bucket from the slurry outlet outlet.
The working principle of the system is as follows:
Waste water to be processed enters adsorption tank 1 through water inlet 11, is equipped with switch valve 71 below coke powder silo 7, turns on the switch valve
71, so that the activated coke in coke powder silo 7 is entered adsorption tank 1 through feed inlet 12 after the transmission of conveyer 72.In adsorption tank 1, warp
Blender I 13 is stirred, and waste water to be processed comes into full contact with activated coke, preliminary to the carry out such as the coloration of waste water, turbidity, suspended matter
Processing, and adsorb the partial solubility organic matter in waste water.
Through treated waste water the enters coagulating basin 2 of adsorption tank 1, coagulant enters coagulating basin 2 by coagulant dosage pipe 21,
It is equipped with coagulant guide pipe 22 below coagulant dosage pipe 21, the short stream of medicament can be prevented, ensure making effective use of for medicament.
Blender II 23 is equipped in coagulating basin 2, it is agitated that waste water is made to react abundant with coagulant.
The waste water outflow handled through coagulating basin 2 enters flocculation basin 3, and flocculation aid adds pipeline 31 by flocculation aid and enters flocculation
Pond 3, micro- sand enter flocculation basin 3 by micro- sand entrance 32, and guide shell 33 is located at the central location of flocculation basin 3, blender III 34
It is agitated that waste water is made to react abundant with flocculation aid and micro- sand inside guide shell 33.Micro- sand makes pollutant in the work of flocculant
The wadding body for being easy to precipitate that bulky grain is formed with lower polymerization, to accelerate settling velocity of the pollutant in separate tank.
Through treated waste water outflow the enters sedimentation basin 4 of flocculation basin 3, it is equipped with inclined plate Disengagement zone 41 above sedimentation basin 4, is contained
The bulk wadding body of micro- sand directly sinks to the bottom of settling zone, and the small wadding body for failing precipitating realizes efficiently in inclined plate Disengagement zone 41
Separation is collected by water receiving tank 42 through treated for inclined plate Disengagement zone 41 clear purified water water, is discharged through outlet conduit 43.Inclined plate
Disengagement zone 41 is additionally provided with wash tub pipe 44, can be rinsed to inclined plate Disengagement zone 41 by wash tub pipe 44, reduces inclined plate blocking
Risk, systems stabilisation operation.The lower section of inclined plate Disengagement zone 41 is equipped with collection mud cone bucket 45, and the mud unit 46 of scraping collected in mud cone bucket 45 is
Mud scraper with rake, to scrape mud and agitation, the rake of mud scraper is slowly rotated around center, will be sunken to the dirt containing micro- sand of bottom of pond
The bottom of mud push-in collection mud cone bucket 45, thus can promote the concentration process of sludge.
The slurry collected in collection mud cone bucket 45 is extracted out by a certain percentage by circulating pump 47, is recycled to desander 5 by the road, by
In the density variation of micro- sand and sludge, in desander 5 under the action of centrifugal force, sludge and micro- sand separation.Isolated is micro-
Sand enters flocculation basin 3 through micro- sand entrance 32, and the isolated mortar that removes enters in coke powder separate tank 6.
It is equipped with baffle plate in coke powder separate tank 6 to separate activated coke by baffle plate, the work being partially separated
Property coke by feed inlet 12 enter adsorption tank 1 in, realize recycling for activated coke, residual activity coke is drained by sludge pump
Dewatering unit.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of advanced treatment process of coking waste water, includes the following steps:
Activated coke is added into waste water, carries out adsorption treatment, collects single treatment waste water；
Coagulant is added into the single treatment waste water, carries out coagulating treatment, collects secondary treatment waste water；
Flocculation aid and micro- sand are added into the secondary treatment waste water, carries out flocculation treatment；
First separation is carried out to the secondary treatment waste water after flocculation treatment, is purified water and slurry；
Second separation is carried out to the slurry, micro- sand is obtained and except mortar, micro- sand is added to the secondary treatment waste water
In；
To described except mortar carries out third separation, activated coke is collected, and the activated coke is added into the waste water.
2. advanced treatment process of coking waste water according to claim 1, which is characterized in that the partial size of the activated coke is
0.075-0.3mm, iodine sorption value >=500mg/g.
3. advanced treatment process of coking waste water according to claim 1 or 2, which is characterized in that the coagulant is polymerization
One or both of aluminium chloride and bodied ferric sulfate；
The dosage of the coagulant is 30-60mg/L；
In the coagulating treatment, apply stirring, the revolving speed of the stirring is 200-250r/min.
4. advanced treatment process of coking waste water according to any one of claim 1-3, which is characterized in that the flocculation aid
For polyacrylamide, the dosage of the polyacrylamide is 1-3mg/L.
5. advanced treatment process of coking waste water described in any one of -4 according to claim 1, which is characterized in that micro- sand
Effective grain size is 140-160 μm, nonuniformity coefficient≤1.5；
In the flocculation treatment, apply stirring, the revolving speed of the stirring is 25-30r/min.
6. advanced treatment process of coking waste water according to claim 5, which is characterized in that SiO in micro- sand2Content
Not less than 95wt%, the hardness level of micro- sand is not less than 7Mohs；
The dosage of micro- sand is 2-3mg/L.
7. a kind of coking advanced waste treatment system, adsorption tank, coagulating basin, flocculation basin and precipitating including being sequentially communicated setting
Pond further includes,
Desander, feed inlet are connected to the slurry outlet of the sedimentation basin, and sand export is connected to the flocculation basin；
Coke powder separate tank, the slurry outlet of the desander are connected to the coke powder separate tank, and the coke powder separate tank discharges of the coke
Mouth is connected to the adsorption tank.
8. coking advanced waste treatment system according to claim 7, which is characterized in that further include coagulant dosage pipe and
The coagulant guide pipe communicated therewith, the caliber of the coagulant guide pipe are greater than the caliber of the coagulant dosage pipe；With/
Or,
Waste water inlet, the bottom of pond close to the coagulating basin are set on the side wall of the coagulating basin, the coagulant guide pipe
Coagulant outlet end is set in the coagulating basin close to the waste water inlet.
9. coking advanced waste treatment system according to claim 7 or 8, which is characterized in that the coagulating basin with it is described
Setting separates the partition of the two between flocculation basin, and the partition top opens up overflow port, so that the waste water in the coagulating basin passes through
The overflow port overflow enters in the flocculation basin；
Guide shell is set inside the flocculation basin, and the guide shell is located at the central location of flocculation basin, setting in the guide shell
Blender；
Baffle plate is arranged in the coke powder separate tank.
10. the coking advanced waste treatment system according to any one of claim 7-9, which is characterized in that the precipitating
Pond includes the separating inclined plate of both water receiving tank, collection mud cone bucket and segmentation, and the water receiving tank is located at the top of the separating inclined plate, institute
The lower section that collection mud cone bucket is located at the separating inclined plate is stated, so that waste water passes through the separation from close to the side of the collection mud cone bucket
Inclined plate, purified water enter the water receiving tank outlet, and the pulp fall of retention is into the collection mud cone bucket；
The bottom of the collection mud cone bucket is arranged the slurry outlet and scrapes mud unit, will be adhered to institute to scrape mud unit described in
The slurry stated on collection mud cone bucket inner wall scrapes and from the slurry outlet outlet.
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| CN202210440027.7A CN114873779A (en) | 2019-01-03 | 2019-01-03 | Coking wastewater advanced treatment method and system |
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Application publication date: 20190326 |