CN103951107A - Device and method for treating coking wastewater - Google Patents
Device and method for treating coking wastewater Download PDFInfo
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- CN103951107A CN103951107A CN201410173488.8A CN201410173488A CN103951107A CN 103951107 A CN103951107 A CN 103951107A CN 201410173488 A CN201410173488 A CN 201410173488A CN 103951107 A CN103951107 A CN 103951107A
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Abstract
The invention discloses a device and method for treating industrial organic coking wastewater, and particularly discloses a device and method for deeply treating coking wastewater subjected to biochemical treatment. The treatment device comprises a mixed reaction pool, a radial flow settlement tank, a bottom mud pump room, a plate-frame pressure filtration room, an activated coke pulping device and a chemicals feeding device; wastewater is sequentially subjected to adsorption, coagulation and flocculation reaction after arriving at the mixed reaction pond, and flows in the radial flow settlement tank after the deep treatment is completed. The device and method have the characteristics that by utilizing a side product, namely coal-based activated coke powder, of a sintering handpiece smoke coal-based activated coke desulfurization and denitrification system as an adsorbent, the coking wastewater is deeply treated to be subjected to biochemical treatment and then flows out, so as to achieve the purpose of treating wastes with processes of wastes against one another. The device and the method have the advantages of being good in treatment effect, free from secondary pollution, less in investment, small in occupied area, low in running cost, and good in economic benefits.
Description
Technical field
The present invention relates to a kind of industrial organic waste water treatment unit and method, particularly advanced treatment apparatus and the method after coking chemical waste water biochemistry.
Background technology
Coking chemical waste water is mainly derived from the dry distillation of coal and coal gas is cooling and scavenging process, the phenol, prussiate, thiocyanide and the ammonia nitrogen that contain high density, also contain the poly-ring aromatic compoundses such as heterogeneous ring compound and biphenyl such as being difficult to biodegradable oils, pyridine simultaneously, toxicity is large, intractability is large, is the difficult point of coking industry wastewater treatment always.
Existing treatment technology mainly adopts biological denitrificaion and rear coagulating sedimentation to process integrated technique, and water quality treatment cannot reach coking chemistry industrial pollutants discharging standards table 2 requirement of promulgating in 2012.In conventional process technology, biologic treating technique mainly adopts A/O or A2/O biological denitrification process to come decarburization simultaneously and denitrogenation, large and difficult degradation composition is high based on coking chemical waste water toxicity, the impact resistance of traditional biological denitrification process is poor, the dilution water yield is large, processing cost is high, and the strengthening of hardly degraded organic substance is removed not, causes COD and the colourity cannot be up to standard.
Because biological treatment water outlet exceeds standard seriously, must carry out advanced treatment, the advanced treatment process of research has coagulating sedimentation, charcoal absorption, advanced oxidation, membrane sepn etc. at present.Because coagulating sedimentation cost is relatively low, widespread use in coking wastewater deep treatment, but residual organic substances polarity is stronger, and many containing chromophoric group, COD and color removal efficiency are lower, and water outlet is still difficult to up to standard.Most of high-level oxidation technology (as electrochemical oxidation process, photochemical catalysis etc.) processing cost is high, and through engineering approaches difficulty is large; The high-level oxidation technology such as fenton and ozone oxidation ripening degree is high, and technical risk is low, invests littlely, and treatment effect is good, but adds the cost of hydrogen peroxide higher, adds a large amount of soda acids to introduce a lot of salts and is unfavorable for waste water recycling; Directly ozone oxidation is inadequate based on ozone oxidation ability, and ozone utilization rate is low, and cost is high, and treatment effect is undesirable.In membrane separation technique, nanofiltration and reverse osmosis are higher to salt and organic removal rate, can prepare de-salted water, but it is seriously polluted to directly apply to coking chemical waste water film, and membrane lifetime is low, investment and processing cost are high, must carry out the front pre-treatment of film, dense water outlet becomes a difficult problem simultaneously.
Conventional plant gac is better for coking chemical waste water aftertreatment adsorption effect, but adsorbs saturated rear difficult regeneration, causes cost for wastewater treatment too high.
There is secondary pollution, invest the problems such as high, running cost is high in above-mentioned treatment process.
Summary of the invention
The invention provides a kind of by product that utilizes the coal-based active coke desulphurizing denitrating system of flue gas of sintering machine head, i.e. coal-based activated coke powder, as the device and method of sorbent material advanced treatment on coking wastewater containing phenol and cyanide biochemical system water outlet, reaches the object of the treatment of wastes with processes of wastes against one another.Have that treatment effect is good, non-secondary pollution, floor space are little, less investment, feature that running cost is low, make stable " coking chemistry emission of industrial pollutants standard " (GB16171-2012) the directly emission standard of table 2 that reaches of Sewage Water Emissions concentration limit.
The present invention realizes by the following technical solutions:
A kind of device of Treatment of Wastewater in Coking is: comprise between mixed reaction pond, radial-flow sedimentation tank, bed mud pump house, filter press, activated coke pulping device and medicament addition device; Described mixed reaction pond is provided with two, wherein one for subsequent use; Mixed reaction pond comprises distribution reservoir, and every mixed reaction pond is divided into three grid spaces by concrete diaphragm, is provided with a set of whipping appts in every grid space; Radial-flow sedimentation tank is provided with two, is provided with mud scraper in settling tank; In bed mud pump house, be provided with slush pump; Between filter press, be provided with two cover plate-and-frame filter press, activated coke pulping device comprises pulping tank and add pump, and medicament addition device comprises coagulant dosage device and flocculating agent feeding device.
Further, described slush pump is provided with three, two normal uses, and one is for subsequent use, and the flow of slush pump is 15m
3/ h, lift is 65m; The filtration area of described plate-and-frame filter press is 150m
2, chamber space is 2.49m
3; Described activated coke pulping tank is of a size of φ 5m × 5m, and adding pumping capacity is 12.5m
3/ h, lift is 20m.
The method of Treatment of Wastewater in Coking provided by the invention, adopts said apparatus Treatment of Wastewater in Coking, comprises the following steps:
(1) certainly flow into mixed reaction pond from the water outlet of coking chemical waste water biochemical system second pond through mixed reaction pond distribution reservoir;
(2) in three grid spaces in every mixed reaction pond, be respectively equipped with activated coke slurry pool, coagulating agent pond, flocculation agent pond, the waste water of mixed reaction pond adsorbs successively, coagulation, flocculation reaction, enters radial-flow sedimentation tank;
(3) after radial-flow sedimentation tank precipitation, water outlet is from flowing into clean water basin reuse, and bed mud enters bed mud pump house;
(4) bed mud in bed mud pump house is through slush pump, and a part is returned to activated coke pulping tank recycling, and another part enters plate-and-frame filter press dehydration;
(5) plate-and-frame filter press filtrate is back to mixed reaction pond, and mud cake substitutes coking coal and produces for coke oven.
Further, described activated coke slurries, its effective constituent is the by product activated coke powder of the burnt system for desulfuration and denitration of sintering activity, and the concentration that activated coke powder is configured to 15%-25% adds, and adding concentration is 1-3ppm, and consumption is 20 ton per days.
Described coagulating agent is polymerize aluminum chloride, and concentration is 5%-10%, and adding concentration is 20-100ppm; Described flocculation agent is polyacrylamide, and concentration is 0.1%-0.5%, and adding concentration is 0.5-2ppm.
The residence time of described waste water in mixing reactor is: the residence time is 20-40 minute altogether, and the residence time in activated coke slurry pool, coagulating agent pond, flocculation agent pond is substantially equal; The stirring velocity in three ponds in described mixed reaction pond is respectively: activated coke slurry pool is 120-150rpm, and coagulating agent pond is 120-150rpm, and flocculation agent pond is 20-40rpm.
The residence time of described waste water in radial-flow sedimentation tank is 1.5-3.5 hour, and surface load is 0.6-1.5m
3/ (m
2h).
Compared with existing advanced treatment process, feature of the present invention is to utilize coal-based activated coke powder as sorbent material, and water outlet after advanced treatment on coking wastewater biochemistry reaches the object of the treatment of wastes with processes of wastes against one another.The present invention has following beneficial effect:
1, treatment effect is good---and colourity, the peculiar smell of this technique to the water outlet of coking biochemical treatment system has good removal effect, COD concentration can be reduced to below 80mg/L by 150mg/L left and right, ammonia nitrogen, prussiate etc. all have decline in various degree, and water conditioning reaches " coking chemistry emission of industrial pollutants standard " (GB16171-2012) directly emission standard of table 2.
2, non-secondary pollution---compared with other techniques, the whole process of technique does not produce the more reluctant tail water such as reverse osmosis concentrated salt solution, absorb-elute liquid.
3, less investment, floor space are little---and this technique only needs to increase between mud filter press, activated coke dosing system, coagulation-flocculation adding of agent system, bed mud pump house, gross investment is less than 2,000,000.Compared with other techniques, save more than 3,000 ten thousand yuan of gross investments.
4, running cost is low---and cost consumption is mainly coagulation, flocculation medicament, the electricity consumptions such as pump, stirrer, the ton about 0.3 yuan of left and right of cost of water treatment, and existing other technique ton water running costs are all in 2-4 unit.
5, good in economic efficiency---mud cake Substitute For Partial coking coal returns coke oven utilization, by utilizing every day 20 tons of useless activated coke powder to calculate, substitutes every year 7300 tons, coking coal (1400 yuan/ton of unit prices), 1,241 ten thousand yuan/year of benefits.
Technique of the present invention also can coagulation section be transformed after existing coking chemical waste water biochemical treatment system.Do not need again newly-built mixed reaction pond, radial-flow sedimentation tank, adding of agent system etc.
Below in conjunction with drawings and Examples, the present invention will be further described.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment:
As shown in Figure 1, the advanced treatment process flow process of coking chemical waste water provided by the invention is:
(1) flow into the distribution reservoir of mixed reaction pond from the waste water of biochemical system second pond, then enter mixed reaction pond;
(2) mixed reaction pond is separated into three spaces by concrete diaphragm, be respectively activated coke slurry pool, coagulating agent pond, flocculation agent pond, the activated coke slurries that to have added concentration in activated coke slurry pool be 15-25%, adding concentration is 1-3ppm, the polymerize aluminum chloride that to have added concentration in coagulating agent pond be 5%-10%, adding concentration is 20-100ppm, has added the polyacrylamide of concentration 0.1%-0.5% in flocculation agent pond, and adding concentration is 0.5-2ppm; Waste water adsorbs successively, coagulation, flocculation reaction, enters radial-flow sedimentation tank;
(3) after radial-flow sedimentation tank precipitation, water outlet is from flowing into clean water basin reuse, and bed mud enters bed mud pump house;
(4) bed mud in bed mud pump house is through slush pump, and a part is returned to activated coke pulping tank recycling, and another part enters plate-and-frame filter press dehydration;
(5) plate-and-frame filter press filtrate is back to mixed reaction pond, and mud cake substitutes coking coal and produces for coke oven.
Its water quality detection situation of waste water by the inventive method processing is as shown in the table:
| Analysis project | pH | SS | Oil | COD | Ammonia nitrogen | Total cyanogen | Phenol | Total phosphorus |
| Unit | — | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L |
| Technique water inlet | 7.35 | 38 | 6.81 | 145 | 4.94 | 3.08 | 0.028 | 3.26 |
| Process for Effluent | 6.76 | 16 | 0.262 | 78.5 | 2.45 | 0.15 | 0.014 | 0.84 |
| Reference standard | 6-9 | 50 | 2.5 | 80 | 10 | 0.2 | 0.30 | 1.0 |
Can be drawn by upper table, water pollutant concentration all reaches " coking chemistry emission of industrial pollutants standard " (GB16171-2012) directly emission standard of table 2.
Technique of the present invention also can coagulation section be transformed after existing coking chemical waste water biochemical treatment system.Do not need again newly-built mixed reaction pond, radial-flow sedimentation tank, adding of agent system etc.
Claims (10)
1. a device for Treatment of Wastewater in Coking, is characterized in that: comprise between mixed reaction pond, radial-flow sedimentation tank, bed mud pump house, filter press, activated coke pulping device and medicament addition device; Described mixed reaction pond is provided with two, wherein one for subsequent use; Mixed reaction pond comprises distribution reservoir, and every mixed reaction pond is divided into three grid spaces by concrete diaphragm, is provided with a set of whipping appts in every grid space; Radial-flow sedimentation tank is provided with two, is provided with mud scraper in settling tank; In bed mud pump house, be provided with slush pump; Between filter press, be provided with two cover plate-and-frame filter press, activated coke pulping device comprises pulping tank and add pump, and medicament addition device comprises coagulant dosage device and flocculating agent feeding device.
2. the device of Treatment of Wastewater in Coking according to claim 1, is characterized in that: described slush pump is provided with three, two normal uses, and one is for subsequent use, and the flow of slush pump is 15m
3/ h, lift is 65m.
3. the device of Treatment of Wastewater in Coking according to claim 1, is characterized in that: the filtration area of described plate-and-frame filter press is 150m
2, chamber space is 2.49m
3.
4. the device of Treatment of Wastewater in Coking according to claim 1, is characterized in that: described activated coke pulping tank is of a size of φ 5m × 5m, and adding pumping capacity is 12.5m
3/ h, lift is 20m.
5. a method for the device Treatment of Wastewater in Coking described in employing claim 1 ~ 4 any one, is characterized in that: comprise the following steps:
(1) certainly flow into mixed reaction pond from the water outlet of coking chemical waste water biochemical system second pond through mixed reaction pond distribution reservoir;
(2) in three grid spaces in every mixed reaction pond, be respectively equipped with activated coke slurry pool, coagulating agent pond, flocculation agent pond, the waste water of mixed reaction pond adsorbs successively, coagulation, flocculation reaction, enters radial-flow sedimentation tank;
(3) after radial-flow sedimentation tank precipitation, water outlet is from flowing into clean water basin reuse, and bed mud enters bed mud pump house;
(4) bed mud in bed mud pump house is through slush pump, and a part is returned to activated coke pulping tank recycling, and another part enters plate-and-frame filter press dehydration;
(5) plate-and-frame filter press filtrate is back to mixed reaction pond, and mud cake substitutes coking coal and produces for coke oven.
6. the method for Treatment of Wastewater in Coking according to claim 5, is characterized in that: described activated coke slurries are: activated coke powder is configured to the concentration of 15%-25%, adding concentration is 1-3ppm, and consumption is 15-20 ton per day.
7. the method for Treatment of Wastewater in Coking according to claim 5, is characterized in that: described coagulating agent is polymerize aluminum chloride, and concentration is 5%-10%, and adding concentration is 20-100ppm; Described flocculation agent is polyacrylamide, and concentration is 0.1%-0.5%, and adding concentration is 0.5-2ppm.
8. the method for Treatment of Wastewater in Coking according to claim 5, is characterized in that: the altogether residence time of described waste water in mixing reactor is 20-40 minute.
9. the method for Treatment of Wastewater in Coking according to claim 5, it is characterized in that: the stirring velocity in three ponds in described mixed reaction pond is respectively: activated coke slurry pool is 120-150rpm, coagulating agent pond is 120-150rpm, and flocculation agent pond is 20-40rpm.
10. the method for Treatment of Wastewater in Coking according to claim 5, is characterized in that: the residence time of described waste water in radial-flow sedimentation tank is 1.5-3.5 hour, and surface load is 0.6-1.5m
3/ (m
2h).
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|---|---|---|---|
| CN201410173488.8A CN103951107B (en) | 2014-04-28 | 2014-04-28 | A kind of device and method of Treatment of Wastewater in Coking |
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| CN201410173488.8A CN103951107B (en) | 2014-04-28 | 2014-04-28 | A kind of device and method of Treatment of Wastewater in Coking |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723853A (en) * | 2013-12-04 | 2014-04-16 | 江苏双净净化科技有限公司 | Intermittent comprehensive treating system for gas generating station and treating method of intermittent comprehensive treating system |
| CN104192966A (en) * | 2014-09-25 | 2014-12-10 | 余柏林 | Technical method and device for deeply treating coking biochemical wastewater through coke powder |
| CN104355458A (en) * | 2014-11-21 | 2015-02-18 | 中冶赛迪工程技术股份有限公司 | Deep treatment method of coking wastewater |
| CN107089739A (en) * | 2017-06-19 | 2017-08-25 | 北京中科康仑环境科技研究院有限公司 | The enhanced coagulation technique and its device of a kind of biochemical postindustrial waste water |
| CN108083497A (en) * | 2017-12-21 | 2018-05-29 | 上海万狮环保科技有限公司 | A kind of application of coking wastewater deep treatment composite drug |
| CN109179551A (en) * | 2018-09-07 | 2019-01-11 | 湖南华菱涟源钢铁有限公司 | Phenol-cyanogen wastewater treatment method |
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| CN1958486A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨工业大学 | Advanced treatment method for carbonization wastewater |
Non-Patent Citations (1)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723853A (en) * | 2013-12-04 | 2014-04-16 | 江苏双净净化科技有限公司 | Intermittent comprehensive treating system for gas generating station and treating method of intermittent comprehensive treating system |
| CN103723853B (en) * | 2013-12-04 | 2015-08-26 | 江苏双净净化科技有限公司 | Gas generating station intermittent type total system and treatment process thereof |
| CN104192966A (en) * | 2014-09-25 | 2014-12-10 | 余柏林 | Technical method and device for deeply treating coking biochemical wastewater through coke powder |
| CN104192966B (en) * | 2014-09-25 | 2016-03-09 | 余柏林 | Utilize processing method and the device of coke powder advanced treatment on coking biochemical waste water |
| CN104355458A (en) * | 2014-11-21 | 2015-02-18 | 中冶赛迪工程技术股份有限公司 | Deep treatment method of coking wastewater |
| CN107089739A (en) * | 2017-06-19 | 2017-08-25 | 北京中科康仑环境科技研究院有限公司 | The enhanced coagulation technique and its device of a kind of biochemical postindustrial waste water |
| CN108083497A (en) * | 2017-12-21 | 2018-05-29 | 上海万狮环保科技有限公司 | A kind of application of coking wastewater deep treatment composite drug |
| CN109179551A (en) * | 2018-09-07 | 2019-01-11 | 湖南华菱涟源钢铁有限公司 | Phenol-cyanogen wastewater treatment method |
| CN109179551B (en) * | 2018-09-07 | 2021-09-28 | 湖南华菱涟源钢铁有限公司 | Phenol-cyanogen wastewater treatment method |
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