CN104030523A - Deep treatment method of coking wastewater - Google Patents
Deep treatment method of coking wastewater Download PDFInfo
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- CN104030523A CN104030523A CN201410233911.9A CN201410233911A CN104030523A CN 104030523 A CN104030523 A CN 104030523A CN 201410233911 A CN201410233911 A CN 201410233911A CN 104030523 A CN104030523 A CN 104030523A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000002351 wastewater Substances 0.000 title claims abstract description 41
- 238000004939 coking Methods 0.000 title claims abstract description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000000926 separation method Methods 0.000 claims abstract description 56
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 35
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 10
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000000571 coke Substances 0.000 claims description 63
- 239000002002 slurry Substances 0.000 claims description 42
- 238000004062 sedimentation Methods 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000001179 sorption measurement Methods 0.000 claims description 26
- 239000002894 chemical waste Substances 0.000 claims description 19
- 238000000227 grinding Methods 0.000 claims description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- 230000001954 sterilising effect Effects 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002957 persistent organic pollutant Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 238000006385 ozonation reaction Methods 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000010802 sludge Substances 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000003851 biochemical process Effects 0.000 description 2
- 238000005842 biochemical reaction Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007255 decyanation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 230000008558 metabolic pathway by substance Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Sorption (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a deep treatment method of coking wastewater. The deep treatment method comprises the following five procedures of: coke powder preparation, coke powder absorption, biochemical degradation, solid-liquid separation and ozone disinfection. A2/O biochemical wastewater can meet the requirement for usage of circulating cooling water after being treated through the deep treatment method; the integral treatment system is small in construction investment, low in operation and maintenance cost and stable in continuous operation effect; the coking wastewater, coke powder and nitrogen which are used for the deep treatment method can be all recycled; the integral treatment process does not generate the secondary pollution and greatly meets the requirements for low carbon and environmental protection.
Description
Technical field
The present invention relates to wastewater processing technology, refer in particular to a kind of deep treatment method of coking chemical waste water.
Background technology
Along with the enhancing of people's environmental consciousness, the pollution problem of coking industry is more and more subject to people's attention, and wherein, the aftertreatment problem of coking chemical waste water highlights day by day.Coking chemical waste water is the waste water producing in coal coke processed, gas purification and Chemicals treating process, measures large and complicated component, includes the Some Organic Pollutants such as the inorganic pollutants such as ammonia, nitrogen, cyanogen and phenols, naphthalene, pyridine, quinoline.At present, the coking chemical waste water of most domestic coke-oven plant adopts A
2/ O biochemical process is processed.A
2/ O biochemical process includes bi-level treatment process, and coagulation first carries out separation by the pollutent in high-concentration waste water, mainly comprises the operations such as ammoniacal liquor dephenolize, ammonia distillation, whole cold water decyanation; Second-stage treatment is that coagulation waste water is further carried out to harmless treatment, and employing method comprises activated sludge process and biological einforcement method.
Because the composition of coking chemical waste water is very complicated, contain and be difficult in a large number biodegradable heterocycle and polycyclc aromatic compound, cannot be completely separated in coagulation process, thereby cause the pollutant loads such as the COD of the waste water after second-stage treatment and ammonia nitrogen still higher, do not reach sewage drainage standard, cannot meet the environmental requirement day by day improving.Therefore, also need to be for A
2/ O biochemical waste water further carries out advanced treatment.
Conventional deep treatment method mainly comprises flocculence, active carbon adsorption, membrane separation process etc.Wherein, the treatment facility floor space of flocculence is large, and reagent consumption amount is very large, causes processing cost to improve; And the handling principle of flocculence is that undegradable organic pollutant is transferred in mud by waste water, organic pollutant itself does not obtain innoxious degraded thoroughly, also can bring the aftertreatment problem of mud.Operation and the running cost of active carbon adsorption are higher, and gac is expensive and cannot regenerate, and can bring too the aftertreatment problem of gac.The result of use of membrane separation process is good, but investment is large, and separatory membrane is expensive and very easily damage, and operating process is complicated, it is stable not to produce, processing cost is high, is difficult to generally apply.
Therefore, find that a kind of effect is remarkable, with low cost, simple to operate, to be convenient to the advanced treatment method for carbonization wastewater promoted significant.
Summary of the invention
The technical issues that need to address of the present invention are to provide that a kind of running cost is low, the effect advanced treatment method for carbonization wastewater of environmental protection significantly again, and coking chemical waste water after treatment can directly be used as recirculated cooling water.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A deep treatment method for coking chemical waste water, its concrete operation is:
A, coke powder preparation
Coke powder in feed bin is delivered to continuously in thunder grinding machine and is pulverized as finely-ground coke; Finely-ground coke is recycled nitrogen and is delivered to coke breeze cyclonic separation storehouse, and is deposited in bottom, coke breeze cyclonic separation storehouse;
B, coke powder adsorption
A
2/ O biochemical waste water enters the bottom in coke breeze cyclonic separation storehouse by pipeline, and mixes, adsorbs with the finely-ground coke of bottom, coke breeze cyclonic separation storehouse, forms adsorption slurry; Adsorption slurry is discharged by the bottom discharge port in coke breeze cyclonic separation storehouse;
C, biochemical degradation
First adsorption slurry enters gas-liquid separation groove and removes the nitrogen that is mingled with in slurries, is then admitted to biochemical reactor, completes the biochemical degradation to organic pollutant in adsorption slurry; Biochemical slurries after degraded are discharged by the discharge port of biochemical reactor bottom;
D, solid-liquid separation
Biochemical slurries are admitted to sedimentation concentration device by pipeline and carry out sedimentation, the separated thick slurry of sedimentation and the sedimentation clear liquid of obtaining; The thick slurry of described sedimentation is discharged, is entered whizzer carry out centrifugation by pipeline from the discharge port of sedimentation thickener bottom; Described sedimentation clear liquid flows out, enters sandrock filter and carry out filtration, purification from the overflow port on sedimentation thickener top, and the cleaner liquid of crossing that completes purification is discharged from the discharge port of sandrock filter bottom;
E, ozonization
Cross cleaner liquid and be admitted in the fixedly oxidation reactor that is loaded with granule coke powder, utilize ozone to carry out degerming sterilization to crossing cleaner liquid, gained sterilization clear liquid directly enters recirculated cooling water pipeline.
Further improvement of the present invention is: in operation A, described coke powder is from the dry coke powder of wet method coking workshop section and/or the coke breeze that is less than 5% from the water content of Jiao Chang; The granularity of the described finely-ground coke through pulverizing is 10 microns ~ 100 microns.
Further improvement of the present invention is: in described operation A, finely-ground coke is recycled nitrogen and sends in coke breeze cyclonic separation storehouse, at the bottom of most of finely-ground coke is deposited to storehouse, small portion finely-ground coke is carried secretly formation dust-laden nitrogen, from the gas discharge outlet at top, coke breeze cyclonic separation storehouse, is discharged by nitrogen gas stream; Dust-laden nitrogen after discharge is divided into two portions by pipeline, and a part of dust-laden nitrogen is sent back in thunder grinding machine again to be recycled, and another part dust-laden nitrogen is admitted to Venturi scrubber and A
2/ O biochemical waste water is mixed to form dust-laden waste water, and dust-laden waste water enters gas-liquid separation groove by the discharge port of Venturi scrubber bottom.
Further improvement of the present invention is: in described process B, from A
2the A of/O biochemical treatment system water outlet
2/ O biochemical waste water is divided into two shunt after pump pressurization, the A of the first shunt
2/ O biochemical waste water directly enters coke breeze cyclonic separation storehouse, the A of the second shunt
2/ O biochemical waste water is introduced into Venturi scrubber and mixes, is admitted to gas-liquid separation groove with dust-laden nitrogen.
Further improvement of the present invention is: in described operation C, in gas-liquid separation groove, isolated nitrogen is discharged from the air outlet at gas-liquid separation groove top, reenters thunder grinding machine for delivery of finely-ground coke; Described biochemical reactor is the coke powder slurry bed biochemical reactor of plural serial stage, and the bottom of the coke powder of every one-level slurry bed biochemical reactor is provided with air aeration head.
Further improvement of the present invention is: in described step D, the filter cake that the thick slurry of sedimentation obtains after centrifugation is directly used in coal-blending coking; Between described sedimentation concentration device and sandrock filter, be also provided with the sedimentation clear liquid groove for temporary sedimentation clear liquid.
Further improvement of the present invention is: in described operation E, the ozone that ozonizer produces is entered by the ozone entrance of fixing oxidation reactor bottom.
Owing to having adopted technique scheme, the technical progress that the present invention obtains is as follows:
The invention provides a kind of deep treatment method of coking chemical waste water.A
2/ O biochemical waste water can reach the water requirement of recirculated cooling water after the inventive method is processed; The construction investment cost little, operation and maintenance of whole treatment system is low, operating performance is stable continuously, and the coking chemical waste water using in the inventive method, coke powder and nitrogen all can be re-used, in whole treating processes, do not produce secondary pollution, meet very much the requirement of low-carbon environment-friendly.
The cheap coke powder of Zhong Yi of the present invention coke-oven plant is sorbent material, has replaced expensive gac, greatly reduces the cost of coking wastewater deep treatment; And, coke powder is after treatment separated and carry out centrifugally as the thick slurry of sedimentation at solid-liquid separation process, and gained filter cake can be directly used in coal-blending coking, therefore, whole treating processes can not produce the solid refuse after absorption, and can make the cost of coke making and coal blending decrease.
The nitrogen for delivery of finely-ground coke that the present invention uses can recycle.The dust-laden nitrogen of being discharged by top, coke breeze cyclonic separation storehouse is divided into two portions, a part directly enters recycle in thunder grinding machine by nitrogen circulation pipeline, another part is first fed through and in Venturi scrubber, carries out scrubbing dust collection, sends into vapor-liquid separation groove again and carry out separation, avoids finely-ground coke to accumulate in circulating nitrogen gas and affects the effect that nitrogen circulation is used.Through above-mentioned dust removal process, the nitrogen of discharging in gas-liquid separation groove just can directly be used as circulating nitrogen gas.
From the common coke powder of wet method coking workshop section and Jiao Chang, after thunder grinding machine is pulverized, obtain the finely-ground coke that granularity is very little, the specific surface area of finely-ground coke is large, have good adsorption effect, therefore as finely-ground coke and A
2after/O biochemical waste water mixes, can active adsorption A
2suspended substance in/O biochemical waste water, can biochemical organism, larger molecular organics, active sludge and be partly dissolved oxygen, reach A
2the rough purification of/O biochemical waste water.
When entering biochemical degradation operation, due to finely-ground coke surface adsorption various can biochemical reactant dense, therefore significantly improved the speed of biochemical reaction; Meanwhile, finely-ground coke has very strong adsorptive power for larger molecular organics that can not be biochemical, is difficult for removing, and therefore can play holding back larger molecular organics; When solid-liquid separation process, larger molecular organics is separated as the thick slurry of sedimentation together with finely-ground coke, re-using, thereby significantly improves the COD decreasing ratio of the coking chemical waste water of knowing clearly.The coke powder slurry bed biochemical reactor that the present invention's biochemical reactor used is plural serial stage, and the bottom of the coke powder of every one-level slurry bed biochemical reactor all arranges air aeration head, can make air, active sludge and can between biochemical reactant, fully mix, guarantee that microorganism has enough oxygen and carries out substance metabolism, thereby improved the speed of biochemical reaction.
Because finely-ground coke itself has adsorption, can adsorb some viscous substances of producing in biological process, avoid the viscosity of biochemical slurries excessive, therefore biochemical slurries can directly enter sedimentation concentration device and carry out solid-liquid separation without adding flocculation agent again, the consumption that has reduced wastewater treatment process Chinese medicine, has reduced cost for wastewater treatment.
A
2/ O biochemical waste water is after the inventive method is processed, and gained sterilization clear liquid reaches the water requirement of recirculated cooling water, directly enters recirculated cooling water pipeline and re-uses.Sterilization clear liquid can directly be used for wet quenching workshop section as water coolant, because the COD value in sterilization clear liquid is very low, can obviously reduce the pollution that quenching tail gas brings atmosphere.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Wherein: 1, A
2/ O biochemical treatment system water outlet, 2, Venturi scrubber, 3, coke breeze cyclonic separation storehouse, 4, thunder grinding machine, 5, gas-liquid separation groove, 6, biochemical reactor, 7, sedimentation concentration device, 8, sedimentation clear liquid groove, 9, sandrock filter, 10, fixing oxidation reactor, 11, ozonizer, 12, whizzer, 13, feed bin, 14, nitrogen gas delivery-line, 15, recirculated cooling water pipeline.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
A deep treatment method for coking chemical waste water, its technical process as shown in Figure 1, comprises coke powder preparation, coke powder adsorption, biochemical degradation, solid-liquid separation and five operations of ozonization.Equipment used in the present invention mainly comprises Venturi scrubber 2, coke breeze cyclonic separation storehouse 3, thunder grinding machine 4, gas-liquid separation groove 5, biochemical reactor 6, sedimentation concentration device 7 and fixing oxidation reactor 10.
A, coke powder preparation
From the dry coke powder of wet method coking workshop section and/or from the coke breeze that the water content of Jiao Chang is less than 5%, first by lifter, pack feed bin 13 into, then delivered to continuously in thunder mill disintegrating machine 4 and ground, obtain granularity and be the finely-ground coke of 10 microns ~ 100 microns.Finely-ground coke is delivered in coke breeze cyclonic separation storehouse 3 by the circulating nitrogen gas from nitrogen gas delivery-line 14.
In coke breeze cyclonic separation storehouse 3, at the bottom of most of finely-ground coke is deposited to storehouse, small portion finely-ground coke is carried secretly formation dust-laden nitrogen, from the gas discharge outlet at 3 tops, coke breeze cyclonic separation storehouse, is discharged by nitrogen gas stream; Dust-laden nitrogen after discharge is divided into two portions by pipeline, and a part of dust-laden nitrogen is sent back in thunder grinding machine 4 again to be used as circulating nitrogen gas, and another part dust-laden nitrogen is admitted to Venturi scrubber 2, in Venturi scrubber 2, and dust-laden nitrogen and A
2/ O biochemical waste water is mixed to form dust-laden waste water, by the discharge port of Venturi scrubber 2 bottoms, enters gas-liquid separation groove 5.
B, coke powder adsorption
From A
2the A of/O biochemical system water outlet 1
2/ O biochemical waste water contains active sludge.A
2/ O biochemical waste water is divided into two shunt after pump pressurization:
The A of the first shunt
2/ O biochemical waste water is directly squeezed into the bottom in coke breeze cyclonic separation storehouse 3, relies on jet to make finely-ground coke and A
2/ O biochemical waste water mixes, A
2suspended substance in/O biochemical waste water, can biochemical organism, larger molecular organics, active sludge and be partly dissolved oxygen and all by finely-ground coke, adsorbed, form adsorption slurry; In described adsorption slurry, be also enclosed with part nitrogen, by the discharge port of 3 bottoms, coke breeze cyclonic separation storehouse, drain into gas-liquid separation groove 5;
The A of the second shunt
2/ O biochemical waste water enters Venturi scrubber 2 and mixes with dust-laden nitrogen, is then directly admitted to gas-liquid separation groove 5 and mixes with adsorption slurry.
C, biochemical degradation
In gas-liquid separation groove 5, separated the removing of nitrogen of wrapping up in adsorption slurry; Adsorption slurry is discharged and is entered in biochemical reactor 6 by pipeline by the outlet of gas-liquid separation groove 5 bottoms.The coke powder slurry bed biochemical reactor that described biochemical reactor 6 is plural serial stage, and the bottom of the coke powder of every one-level slurry bed biochemical reactor is provided with air aeration head.
In biochemical reactor 6, finely-ground coke surface adsorption can biochemical reactant complete biochemical degradation under the effect of oxygen and active sludge, can not still by finely-ground coke, be adsorbed by biochemical larger molecular organics.Sedimentation concentration device 7 is discharged, entered to biochemical slurries after degraded by the discharge port of biochemical reactor 6 bottoms.
By the isolated nitrogen of adsorption slurry, from the air outlet at gas-liquid separation groove 5 tops, discharged, reenter thunder grinding machine 4, as circulating nitrogen gas, carry finely-ground coke.
D, solid-liquid separation
Biochemical slurries are in the interior sedimentation of sedimentation concentration device 7, separated the thick slurry of sedimentation and sedimentation clear liquid.
The thick slurry of described sedimentation mainly comprises finely-ground coke and biochemical sludge, after being discharged, is admitted to whizzer 12 carries out centrifugal by pipeline by the discharge port of sedimentation concentration device 7 bottoms.Centrifugal gained filter cake is directly used in coal-blending coking, and centrifuge mother liquor flows into sedimentation clear liquid groove 8 by pipeline.
Described sedimentation clear liquid is flowed out by the overflow port on sedimentation concentration device 7 tops, enters sedimentation clear liquid groove 8 and keeps in, and then flows into sandrock filter 9, by the suspended substance in the further filtering water of multi-medium filtering.Fixedly oxidation reactor 10 is discharged, entered to the cleaner liquid of crossing that completes filtration, purification from the discharge port of sandrock filter 9 bottoms.
E, ozonization
Fixedly in oxidation reactor 10, be loaded with granule coke powder, granule coke powder is the impurity in adsorption filtration clear liquid further.In fixing oxidation reactor 10, ozone from ozonizer 11 carries out degerming sterilization to crossing cleaner liquid, recirculated cooling water pipeline 15 is discharged, directly entered to gained sterilization clear liquid by the fixing discharge port of oxidation reactor 10 bottoms, as recirculated cooling water or wet quenching water coolant, uses.
Claims (7)
1. a deep treatment method for coking chemical waste water, is characterized in that the concrete operation of deep treatment method is:
A, coke powder preparation
Coke powder in feed bin (13) is delivered to continuously in thunder grinding machine (4) and is pulverized as finely-ground coke; Finely-ground coke is recycled nitrogen and is delivered to coke breeze cyclonic separation storehouse (3), and is deposited in bottom, coke breeze cyclonic separation storehouse (3);
B, coke powder adsorption
A
2/ O biochemical waste water enters the bottom in coke breeze cyclonic separation storehouse (3) by pipeline, and mixes, adsorbs with the finely-ground coke of bottom, coke breeze cyclonic separation storehouse (3), forms adsorption slurry; Adsorption slurry is discharged by the bottom discharge port in coke breeze cyclonic separation storehouse (3);
C, biochemical degradation
First adsorption slurry enters gas-liquid separation groove (5) and removes the nitrogen that is mingled with in slurries, is then admitted to biochemical reactor (6), completes the biochemical degradation to organic pollutant in adsorption slurry; Biochemical slurries after degraded are discharged by the discharge port of biochemical reactor (6) bottom;
D, solid-liquid separation
Biochemical slurries are admitted to sedimentation concentration device (7) by pipeline and carry out sedimentation, the separated thick slurry of sedimentation and the sedimentation clear liquid of obtaining; The thick slurry of described sedimentation is discharged, is entered whizzer (12) carry out centrifugation by pipeline from the discharge port of sedimentation thickener (7) bottom; Described sedimentation clear liquid flows out, enters sandrock filter (9) and carry out filtration, purification from the overflow port on sedimentation thickener (7) top, and the cleaner liquid of crossing that completes purification is discharged from the discharge port of sandrock filter (9) bottom;
E, ozonization
Cross cleaner liquid and be admitted in the fixedly oxidation reactor (10) that is loaded with granule coke powder, utilize ozone to carry out degerming sterilization to crossing cleaner liquid, gained sterilization clear liquid directly enters recirculated cooling water pipeline (15).
2. the deep treatment method of a kind of coking chemical waste water according to claim 1, is characterized in that: in operation A, described coke powder is from the dry coke powder of wet method coking workshop section and/or the coke breeze that is less than 5% from the water content of Jiao Chang; The granularity of the described finely-ground coke through pulverizing is 10 microns ~ 100 microns.
3. the deep treatment method of a kind of coking chemical waste water according to claim 2, it is characterized in that: in described operation A, finely-ground coke is recycled nitrogen and sends in coke breeze cyclonic separation storehouse (3), at the bottom of most of finely-ground coke is deposited to storehouse, small portion finely-ground coke is carried secretly formation dust-laden nitrogen, from the gas discharge outlet at top, coke breeze cyclonic separation storehouse (3), is discharged by nitrogen gas stream; Dust-laden nitrogen after discharge is divided into two portions by pipeline, and a part of dust-laden nitrogen is again sent back in thunder grinding machine (4) and recycled, and another part dust-laden nitrogen is admitted to Venturi scrubber (2) and A
2/ O biochemical waste water is mixed to form dust-laden waste water, and dust-laden waste water enters gas-liquid separation groove (5) by the discharge port of Venturi scrubber (2) bottom.
4. the deep treatment method of a kind of coking chemical waste water according to claim 1, is characterized in that: in described process B, from A
2the A of/O biochemical treatment system water outlet (1)
2/ O biochemical waste water is divided into two shunt after pump pressurization, the A of the first shunt
2/ O biochemical waste water directly enters coke breeze cyclonic separation storehouse (3), the A of the second shunt
2/ O biochemical waste water is introduced into Venturi scrubber (2) and mixes, is admitted to gas-liquid separation groove (5) with dust-laden nitrogen.
5. the deep treatment method of a kind of coking chemical waste water according to claim 1, it is characterized in that: in described operation C, in gas-liquid separation groove (5), isolated nitrogen is discharged from the air outlet at gas-liquid separation groove (5) top, reenters thunder grinding machine (4) for delivery of finely-ground coke; The coke powder slurry bed biochemical reactor that described biochemical reactor (6) is plural serial stage, and the bottom of the coke powder of every one-level slurry bed biochemical reactor is provided with air aeration head.
6. the deep treatment method of a kind of coking chemical waste water according to claim 1, is characterized in that: in described step D, the filter cake that the thick slurry of sedimentation obtains after centrifugation is directly used in coal-blending coking; Between described sedimentation concentration device (7) and sandrock filter (9), be also provided with the sedimentation clear liquid groove (8) for temporary sedimentation clear liquid.
7. the deep treatment method of a kind of coking chemical waste water according to claim 1, is characterized in that: in described operation E, the ozone that ozonizer (11) produces is entered by the fixing ozone entrance of oxidation reactor (10) bottom.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365241A (en) * | 2016-10-31 | 2017-02-01 | 中冶华天工程技术有限公司 | System for treating coke wastewater through coke powder and cogenerating steam |
| CN106477811A (en) * | 2016-10-31 | 2017-03-08 | 中冶华天工程技术有限公司 | The technique of coke powder Treatment of Wastewater in Coking parallel connection producing steam |
| CN112028295A (en) * | 2020-07-20 | 2020-12-04 | 南京传业环保科技有限公司 | High-concentration organic wastewater treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365241A (en) * | 2016-10-31 | 2017-02-01 | 中冶华天工程技术有限公司 | System for treating coke wastewater through coke powder and cogenerating steam |
| CN106477811A (en) * | 2016-10-31 | 2017-03-08 | 中冶华天工程技术有限公司 | The technique of coke powder Treatment of Wastewater in Coking parallel connection producing steam |
| CN112028295A (en) * | 2020-07-20 | 2020-12-04 | 南京传业环保科技有限公司 | High-concentration organic wastewater treatment device |
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| CN104030523B (en) | 2015-09-23 |
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