CN105060559A - Coking wastewater depth treatment process - Google Patents
Coking wastewater depth treatment process Download PDFInfo
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- CN105060559A CN105060559A CN201510471918.9A CN201510471918A CN105060559A CN 105060559 A CN105060559 A CN 105060559A CN 201510471918 A CN201510471918 A CN 201510471918A CN 105060559 A CN105060559 A CN 105060559A
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Abstract
The present invention belongs to the technical field of waste water treatment, and discloses a coking wastewater depth treatment process. The process includes the following steps: sending the coking wastewater subjected to ammonia steaming, oil separation, flotation and A2/O2 treatment into a conditioning tank for uniform quenching; lifting the coking wastewater by a pump into a dissolved gas cylinder; adding a coagulant before the pump, and adding a coagulant aid after pump; uniformly mixing, releasing the coking wastewater into the flotation tank; sending the outlet water from flotation into a mixing tank; pumping a powdered activated carbon weak solution with the coking wastewater into the mixing tank for adsorption; successively adding a coagulant and a coagulant aid into the wastewater after powdered activated carbon adsorption; and mixing evenly, and flowing by gravity into an inclined tube sedimentation tank for solid-liquid separation, wherein the separated water meets the emission standards. The invention achieves the secondary utilization of hazardous wastes, reduces environmental risks and investment costs of hazardous waste disposal, reaches good treatment effect, greatly improves the depth treatment capacity of coking wastewater, and reduces treatment costs.
Description
Technical field
The invention belongs to waste water treatment field, relate to a kind of advanced treatment process of coking chemical waste water, be specifically related to a kind of through ammonia still process, oil removal, air supporting, A
2/ O
2the advanced treatment process of the coking chemical waste water after art breading.
Background technology
Coking chemical waste water is typical indegradable industrial effluent, and the heterogeneous ring compound etc. containing phenol, prussiate, polycyclc aromatic compound, petroleum-type and nitrogen, oxygen, sulphur has the features such as complicated component, hardly degraded organic substance content is high, toxicity is large.
A/O is adopted again after current domestic coking industry adopts the pre-treatment such as ammonia still process, oil removal, air supporting mostly to its trade effluent
2, A
2/ O, A
2/ O
2deng treatment process, the COD of water outlet after process
crbe 200 ~ 300mg/L, NH
3-N is 10 ~ 20mg/L, TP is 3 ~ 5mg/L, total cyanide is 1 ~ 2mg/L, colourity is 80 ~ 100 times, SS be 50 ~ 80mg/L, TN is 20 ~ 40mg/L, do not reach the emission standard in country or place far away, the environmental requirement day by day improved cannot be reached, therefore also need the coking chemical waste water after to biochemical treatment to carry out advanced treatment.
In recent years, a large amount of useful exploration and research have been done in the advanced treatment of coking chemical waste water by coking industry and enviromental protection enterprise, have developed iron-carbon micro-electrolysis, ozone oxidation, Fenton oxidation even depth treatment process, but large Alternative all faces the problems such as technique is immature, plant running is unstable, device one-time investment is large, running cost is high.
Summary of the invention
The invention provides a kind of advanced treatment process of coking waste water.This technique successively after air supporting, powder electroless plating, coagulating sedimentation, coking chemical waste water water outlet COD
cr<40mg/L, NH
3-n<5mg/L, TP<0.5mg/L, total cyanide <0.5mg/L, colourity <20 doubly, SS<20mg/L, TN<15mg/L.This technique has technical maturity, stable, processing cost is low, pollutants removal rate advantages of higher.
The present invention can be achieved through the following technical solutions:
An advanced treatment process for coking chemical waste water, is characterized in that, comprises the following steps:
(1) air supporting workshop section:
Coking chemical waste water after pre-treatment and biochemical treatment enters equalizing tank and carries out evenly modified, dissolving is entered through lift pump, coagulating agent is added before pump, coagulating agent is aluminium iron polychloride, polymerize aluminum chloride, iron(ic) chloride, PAFS, bodied ferric sulfate, Tai-Ace S 150, the mixture of one or more in ferrous sulfate, coagulant aids is added after pump, coagulant aids is non-ionic type, cationic or anionic PAM, air flotation pool is discharged into by the mixed solution after air compressor machine pressurization mixes, after air supporting, clear water gravity flow enters mixing pit, mud enters sludge sump by mud scraper through sludge pipe,
(2) powder electroless plating-coagulation workshop section:
Gac diluent is pumped into mixing pit through pump with coking chemical waste water adsorb, absorption 10min ~ 60min, in the waste water after charcoal absorption, add coagulating agent, coagulant aids successively, coagulating agent is the mixture of one or more in Tai-Ace S 150, aluminium iron polychloride, polymerize aluminum chloride, iron(ic) chloride, PAFS, bodied ferric sulfate, ferrous sulfate; Coagulant aids is non-ionic type, cationic or anionic PAM; Mix rear gravity flow to enter tube settler and carry out solid-liquid separation, the supernatant liquor after separation discharges.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, the liquid aluminium sulfate (Al that described air supporting workshop section coagulating agent preferably utilizes industrial waste acid obtained
2o
3>=6%), the dosage of Tai-Ace S 150 is 0.5 ~ 4.0 ‰ of waste water, and described air supporting workshop section coagulant aids is the dosage of non-ionic type PAM, PAM is 1 ~ 4ppm.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, the dosage of Tai-Ace S 150 is 1.5 ~ 3.0 ‰ of wastewater quality; The dosage of non-ionic type PAM is 2 ~ 3ppm.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, described active carbon powder wood activated charcoal, and activated carbon particle size is 100 ~ 200 orders, and methylene blue adsorption number degree is greater than 100ml/g.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, described gac diluent be gac with water in mass ratio 1:5 ~ 1:10 mix, gac diluent addition is 0.1 ~ 1.0 ‰ of wastewater quality.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, gac diluent addition is 0.3 ~ 0.6 ‰ of wastewater quality; The charcoal absorption time is 20 ~ 30min.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, described charcoal absorption-coagulation workshop section coagulating agent is the liquid aluminium sulfate (Al that industrial waste acid obtains
2o
3>=6%), the dosage of Tai-Ace S 150 is 0.5 ~ 2.0 ‰ of wastewater quality; Coagulant aids is non-ionic type PAM dosage is 1 ~ 4ppm; The tube settler residence time is 1 ~ 4h.
The advanced treatment process of above-mentioned a kind of coking chemical waste water, is characterized in that, the dosage of Tai-Ace S 150 is 0.5 ~ 1.0 ‰ of wastewater quality, and non-ionic type PAM dosage is 2 ~ 3ppm; The tube settler residence time is 2 ~ 3h.
Compare with existing advanced treatment process of coking waste water, the described advanced treatment process of coking waste water of this invention has following advantage:
(1) advanced treatment process of coking waste water of the present invention has the advantages such as facility investment is low, simple to operate, stable, processing cost is low.
(2) coagulating agent selected by air supporting workshop section and charcoal absorption-coagulation workshop section is liquid aluminium sulfate, it is obtained that this Tai-Ace S 150 adopts industrial waste sulfuric acid and ore powder to produce, not only achieve Hazardous wastes and recycle the environmental risk and the cost of investment that reduce dangerous waste disposal, and good to the treatment effect of coking chemical waste water, air supporting workshop section COD
crclearance is 50 ~ 60%, and the liquid aluminium sulfate of charcoal absorption-coagulation workshop section and non-ionic type PAM can by the Powdered Activated Carbon sedimentations in waste water, and the SS reducing waste water makes SS<20mg/L in final coking chemical waste water.
(3) the wooden class Powdered Activated Carbon that adopts of charcoal absorption workshop section, specific surface area is large, can hardly degraded organic substance in active adsorption coking chemical waste water, COD
crclearance can reach more than 50%, and low price, greatly reduce Treatment of Coking Effluent cost.
(4) after this technique advanced treatment, coking chemical waste water water outlet reaches " Shandong Province's south water to north water pollutant along the line comprehensive discharge standard " (DB37/599-2006) (amendment) key preservation area standard and local emission standard, i.e. COD
cr≤ 40mg/L, NH
3-N≤5mg/L, TP<0.5mg/L, total cyanide <0.5mg/L, colourity <20 doubly, SS<20mg/L, TN<15mg/L.
(5) precipitation produced in whole technique can add in sintering oven carries out mixing burning, and be a kind of environmental friendliness, Processing tecchnics with low cost, ton cost of water treatment is between 3 ~ 4 yuan.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, invention is described further.
Accompanying drawing 1 is process flow sheet.
Embodiment
For a better understanding of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Following examples adopt flow process described in accompanying drawing 1, and concrete steps, parameter are see each embodiment.
Shandong coke-oven plant, sewage generation is 4000 ~ 5000t/d, bio-chemical effluent COD
crat 200 ~ 300mg/L, NH
3-N is 10 ~ 20mg/L, TP is 3 ~ 5mg/L, total cyanide is 1 ~ 2mg/L, colourity is 80 ~ 100 times, SS be 50 ~ 80mg/L, TN is 20 ~ 40mg/L.
Embodiment 1
Adopt process Shandong of the present invention coke-oven plant through A
2/ O
2bio-chemical effluent after process
Bio-chemical effluent enters equalizing tank through pipeline, carries out evenly modified, pumps into dissolving through lift pump with the amount of 200t/h, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be wastewater quality with 400L/h(Tai-Ace S 150 add-on 2.0 ‰) pumps in lift pump and enters dissolving with coking chemical waste water, coking chemical waste water is mixed by air compressor machine pressure air-dissolving with liquid aluminium sulfate after, the non-ionic type PAM of 2ppm is added again through volume pump, mixed solution after mixing discharges into air flotation pool, the mud that air supporting produces floats on the upper strata of water, enter sludge sump by mud scraper through sludge pipe, after air supporting, clear water gravity flow enters mixing pit.
120 object wood activated charcoal powder (methylene blue adsorption number degree is greater than 100ml/g) and water are mixed into Powdered Activated Carbon diluent by 1:6, through sludge pump by Powdered Activated Carbon diluent by 0.3 ‰ dosage pump into mixing pit with coking chemical waste water, after Coagulation and Adsorption 25min, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be wastewater quality with 100L/h(Tai-Ace S 150 add-on 0.5 ‰) pumps in the waste water after charcoal absorption, 2ppm non-ionic type PAM is pumped into 400L/h after mixing, after line-blending is even, enters tube settler carries out mud-water separation 2 hours, water outlet gets final product qualified discharge.
The water outlet of each workshop section is as shown in the table:
Embodiment 2
Adopt process Shandong of the present invention coke-oven plant through A
2/ O
2bio-chemical effluent after process
Bio-chemical effluent enters equalizing tank through pipeline, carries out evenly modified, pumps into dissolving through lift pump with the amount of 200t/h, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be wastewater quality with 600L/h(Tai-Ace S 150 add-on 2.5 ‰) pumps in lift pump and enters dissolving with coking chemical waste water, coking chemical waste water is mixed by air compressor machine pressure air-dissolving with liquid aluminium sulfate after, the non-ionic type PAM of 2ppm is added again through volume pump, mixed solution after mixing discharges into air flotation pool, the mud that air supporting produces floats on the upper strata of water, enter sludge sump by mud scraper through sludge pipe, after air supporting, clear water gravity flow enters mixing pit.
120 object wood activated charcoal powder (methylene blue adsorption number degree is greater than 100ml/g) and water are mixed into Powdered Activated Carbon diluent by 1:6, through sludge pump by Powdered Activated Carbon diluent by 0.4 ‰ dosage pump into mixing pit with coking chemical waste water, after Coagulation and Adsorption 30min, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be wastewater quality with 100L/h(Tai-Ace S 150 add-on 0.5 ‰) pumps in the waste water after charcoal absorption, 2.5ppm non-ionic type PAM is pumped into 400L/h after mixing, after line-blending is even, enters tube settler carries out mud-water separation 2 hours, water outlet gets final product qualified discharge.
The water outlet of each workshop section is as shown in the table:
Embodiment 3
Adopt process Shandong of the present invention coke-oven plant through A
2/ O
2bio-chemical effluent after process
Bio-chemical effluent enters equalizing tank through pipeline, carries out evenly modified, pumps into dissolving through lift pump with the amount of 200t/h, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be wastewater quality with 500L/h(Tai-Ace S 150 add-on 2.5 ‰) pumps in lift pump and enters dissolving with coking chemical waste water, coking chemical waste water is mixed by air compressor machine pressure air-dissolving with liquid aluminium sulfate after, the non-ionic type PAM of 2ppm is added again through volume pump, mixed solution after mixing discharges into air flotation pool, the mud that air supporting produces floats on the upper strata of water, enter sludge sump by mud scraper through sludge pipe, after air supporting, clear water gravity flow enters mixing pit.
150 object wood activated charcoal powder (methylene blue adsorption number degree is greater than 100ml/g) and water are mixed into Powdered Activated Carbon diluent by 1:8, through sludge pump by Powdered Activated Carbon diluent by 0.4 ‰ dosage pump into mixing pit with coking chemical waste water, after Coagulation and Adsorption 30min, by volume pump by liquid aluminium sulfate (Al
2o
3>=6%) amount be waste water with 100L/h(Tai-Ace S 150 add-on 0.8 ‰) pumps in the waste water after charcoal absorption, 2.8ppm non-ionic type PAM is pumped into 400L/h after mixing, after line-blending is even, enters tube settler carries out mud-water separation 2.5 hours, water outlet gets final product qualified discharge.
The water outlet of each workshop section is as shown in the table:
Claims (8)
1. an advanced treatment process for coking chemical waste water, is characterized in that, comprises the following steps:
(1) air supporting workshop section:
Coking chemical waste water after pre-treatment and biochemical treatment enters equalizing tank and carries out evenly modified, dissolving is entered through lift pump, coagulating agent is added before pump, coagulating agent is aluminium iron polychloride, polymerize aluminum chloride, iron(ic) chloride, PAFS, bodied ferric sulfate, Tai-Ace S 150, the mixture of one or more in ferrous sulfate, coagulant aids is added after pump, coagulant aids is non-ionic type, cationic or anionic PAM, air flotation pool is discharged into by the mixed solution after air compressor machine pressurization mixes, after air supporting, clear water gravity flow enters mixing pit, mud enters sludge sump by mud scraper through sludge pipe,
(2) powder electroless plating-coagulation workshop section:
Gac diluent is pumped into mixing pit through pump with coking chemical waste water adsorb, absorption 10min ~ 60min, in the waste water after charcoal absorption, add coagulating agent, coagulant aids successively, coagulating agent is the mixture of one or more in Tai-Ace S 150, aluminium iron polychloride, polymerize aluminum chloride, iron(ic) chloride, PAFS, bodied ferric sulfate, ferrous sulfate; Coagulant aids is non-ionic type, cationic or anionic PAM; Mix rear gravity flow to enter tube settler and carry out solid-liquid separation, the supernatant liquor after separation discharges.
2. advanced treatment process of coking waste water according to claim 1, is characterized in that, the liquid aluminium sulfate (Al that described air supporting workshop section coagulating agent preferably utilizes industrial waste acid obtained
2o
3>=6%), the dosage of Tai-Ace S 150 is 0.5 ~ 4.0 ‰ of waste water, and described air supporting workshop section coagulant aids is the dosage of non-ionic type PAM, PAM is 1 ~ 4ppm.
3. advanced treatment process of coking waste water according to claim 2, it is characterized in that, the dosage of Tai-Ace S 150 is 1.5 ~ 3.0 ‰ of wastewater quality; The dosage of non-ionic type PAM is 2 ~ 3ppm.
4. advanced treatment process of coking waste water according to claim 1, it is characterized in that, described active carbon powder wood activated charcoal, activated carbon particle size is 100 ~ 200 orders, and methylene blue adsorption number degree is greater than 100ml/g.
5. advanced treatment process of coking waste water according to claim 4, is characterized in that, described gac diluent be gac with water in mass ratio 1:5 ~ 1:10 mix, gac diluent addition is 0.1 ~ 1.0 ‰ of wastewater quality.
6. advanced treatment process of coking waste water according to claim 5, it is characterized in that, gac diluent addition is 0.3 ~ 0.6 ‰ of wastewater quality; The charcoal absorption time is 20 ~ 30min.
7. advanced treatment process of coking waste water according to claim 1, is characterized in that, described charcoal absorption-coagulation workshop section coagulating agent is the obtained liquid aluminium sulfate (Al of industrial waste acid
2o
3>=6%), the dosage of Tai-Ace S 150 is 0.5 ~ 2.0 ‰ of wastewater quality; Coagulant aids is non-ionic type PAM dosage is 1 ~ 4ppm; The tube settler residence time is 1 ~ 4h.
8. advanced treatment process of coking waste water according to claim 7, it is characterized in that, the dosage of Tai-Ace S 150 is 0.5 ~ 1.0 ‰ of wastewater quality, and non-ionic type PAM dosage is 2 ~ 3ppm; The tube settler residence time is 2 ~ 3h.
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| CN201510471918.9A CN105060559A (en) | 2015-08-05 | 2015-08-05 | Coking wastewater depth treatment process |
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|---|---|---|---|
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Cited By (6)
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| CN105461107A (en) * | 2015-12-01 | 2016-04-06 | 湖南湘牛环保实业有限公司 | Water resource recovering technology for coking wastewater biochemical treatment effluent |
| CN106745818A (en) * | 2017-02-16 | 2017-05-31 | 江苏建霖环保科技有限公司 | A kind of water purification agent used suitable for Coal Chemical Industry, coking industry Sewage advanced treatment |
| 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 |
| CN109231725A (en) * | 2018-11-21 | 2019-01-18 | 郑州嘉晨化工科技有限公司 | A kind of advanced treatment process of coking wastewater |
| CN114605008A (en) * | 2022-04-11 | 2022-06-10 | 江苏罗奈德流体科技有限公司 | Process and device for extracting benzopyrene from coking wastewater |
| CN115093051A (en) * | 2022-06-28 | 2022-09-23 | 重庆市春园环保科技有限公司 | Method for deeply treating coking wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105461107A (en) * | 2015-12-01 | 2016-04-06 | 湖南湘牛环保实业有限公司 | Water resource recovering technology for coking wastewater biochemical treatment effluent |
| CN106745818A (en) * | 2017-02-16 | 2017-05-31 | 江苏建霖环保科技有限公司 | A kind of water purification agent used suitable for Coal Chemical Industry, coking industry Sewage advanced treatment |
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| CN109231725A (en) * | 2018-11-21 | 2019-01-18 | 郑州嘉晨化工科技有限公司 | A kind of advanced treatment process of coking wastewater |
| CN114605008A (en) * | 2022-04-11 | 2022-06-10 | 江苏罗奈德流体科技有限公司 | Process and device for extracting benzopyrene from coking wastewater |
| CN115093051A (en) * | 2022-06-28 | 2022-09-23 | 重庆市春园环保科技有限公司 | Method for deeply treating coking wastewater |
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Application publication date: 20151118 |