CN105174552A - Oil removing treatment method for coal chemical industry high-concentration sewage - Google Patents
Oil removing treatment method for coal chemical industry high-concentration sewage Download PDFInfo
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- CN105174552A CN105174552A CN201510654489.9A CN201510654489A CN105174552A CN 105174552 A CN105174552 A CN 105174552A CN 201510654489 A CN201510654489 A CN 201510654489A CN 105174552 A CN105174552 A CN 105174552A
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Abstract
The invention relates to an oil removing treatment method for coal chemical industry high-concentration sewage. The method specifically comprises the steps of placing the coal chemical industry high-concentration sewage in an oil removal and demulsification unit, and adding a demulsifier and a coagulant aid to enable oily substances in the sewage to be demulsified so as to be removed; then introducing the sewage subjected to oil removal and demulsification into an adsorption unit, and further removing solid floating particles and oily substances in the sewage by means of an adsorbent. The oily substance removal rate and the solid floating particle removal rate are over 97% and 95% respectively, and the COD removal rate is over 40%. The treatment process has the advantages of being simple, good in effect, low in treatment cost and the like and has broad application prospects.
Description
Technical field
The present invention relates to a kind of water treatment method; Particularly relate to a kind of oil removal treatment method being applicable to Coal Chemical Industry height strong sewage.
Background technology
Development of Coal chemical industry is the energy demand of China, but along with the development of Modern Coal-based Chemical, its " water pollutions " and " lack of water " are on the rise, with the Sustainable development of serious threat enterprise, in the urgent need to realizing " near zero release ".But, Coal Chemical Industry height strong sewage is owing to containing a large amount of oily substances and solid suspended particle in water, cause in phenol ammonia recovering process, causing heat exchanger to block, reducing phenol ammonia recovery system stability, in subsequent biochemical process, suppress microbial metabolism, reduce biochemical efficiency.So want to improve Treated sewage reusing rate, key wants oil removing turbidity removal.At present, process oily(waste)water method is more, as chemical method (salting-out process, coacervation), electrochemical process; , membrane separation process, By Bubble-floating Method; Biological process etc.These methods have respective shortcoming: occupation area of equipment is large, it is high to invest, added amount of chemical is large, pre-treatment is complicated.Both at home and abroad more there are gravity method, By Bubble-floating Method, membrane technique etc. to the treatment technology engineering of coal chemical industry sewage is applied, there is no large for the Coal Chemical Industry height strong sewage water yield, oil-in-water, suspension content feature, cause overall oil removing, dedusting cost is high, efficiency is low.What current Application comparison was many add emulsion splitter carrys out oil removing, but existing conventional emulsion splitter is due to the characteristic not for Coal Chemical Industry height strong sewage oil-in-water, solid suspended particle, cause its poor for applicability, inefficiency, and there is the problems such as secondary pollution, dosage be large.
Chinese patent application CN104826578A discloses a kind of method of flyash modified sorbent material and preparation and process oily(waste)water, described method is by specific components modification, special process parameter and operation steps, thus make the sorbent material finally obtained to process oily(waste)water, be used in lower concentration oil-contg waste water and have certain effect, if but show the weak points such as chemical feeding quantity is large, treatment effect is not up to standard on reply process complicated component, stable Coal Chemical Industry height strong sewage.Patent CN103435132B discloses a kind of activated carbon fiber process oily(waste)water and renovation process thereof and device, and activated carbon fiber electrochemical treatment oily(waste)water and in-situ regeneration technology thereof carry out oil removing, and device is loaded down with trivial details, is not easy to realize industrial applications.
Summary of the invention
The object of the invention is a kind of oil removal treatment method that Coal Chemical Industry height strong sewage is provided to improve the deficiencies in the prior art.
Technical scheme of the present invention is: a kind of oil removal treatment method of Coal Chemical Industry height strong sewage, is characterized in that technical process is as follows: high strong sewage water inlet → oil removing breakdown of emulsion unit → absorbing unit → filtering basin → water outlet; Its concrete steps are as follows:
1. oil removing breakdown of emulsion unit: sewage enters oil removing breakdown of emulsion processing unit, adds emulsion splitter and auxiliary agent in grease removal tank, control temperature reacts, thus removes the oily substance in water.Wherein said emulsion splitter is the mixing emulsion splitter of polyether demulsification agent or sulfuric acid and polyether demulsification agent;
2. absorbing unit: the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit, adds sorbent material and processes; Remove the solid suspended particle in water and further oil removing.
3. filtering basin: absorbing unit water outlet is filtered, retains sorbent material.
Preferred above-mentioned steps 1. described in polyether demulsification agent be propylene glycol block ether, isomery ten alcohol polyethers or ten tetracosanol polyethers etc.
When above-mentioned emulsion splitter is polyether demulsification agent, the volume ratio adding quality and sewage of emulsion splitter is 200 ~ 500mg/L.
When above-mentioned emulsion splitter is for mixing emulsion splitter, in emulsion splitter, the volume ratio adding quality and sewage of sulfuric acid is 8 ~ 12g/L.In wherein said mixing emulsion splitter, the mass ratio of sulfuric acid and polyether demulsification agent is 2 ~ 5:1.
In preferred oil removing breakdown of emulsion unit, control temperature is 25 ~ 40 DEG C; Reaction times is 0.5 ~ 5h.
Preferred steps 1. described in auxiliary agent be anion pp amine, cation polypropylene amine or diatomaceous one or both; The volume ratio adding quality and sewage of auxiliary agent is 5 ~ 10mg/L.
Preferred steps 2. described in sorbent material be the mixture of gac and flyash; The mass ratio of gac and flyash is 1:(1 ~ 4); The volume ratio that gac adds quality and sewage is 2.5 ~ 7.5g/L.Add sorbent material finishing time and be generally 3 ~ 5h.
Beneficial effect:
(1) the oil removal treatment method of Coal Chemical Industry height strong sewage of the present invention, the advantages such as integrated artistic emulsion splitter consumption is few, effective, processing speed is fast.
(2) through present invention process process, oily substance in water and solid suspended particle can be made to assemble, the clearance that its clearance can reach 97%, more than 95%, COD respectively can reach more than 40%.
(3) emulsion splitter added in the present invention is the organic complex of sulfuric acid and polyethers emulsion splitter, effectively reduces the dosage of emulsion splitter in oil removal process, significantly improves oil removal efficiency, the problems such as non-secondary pollution.
Embodiment
Below by concrete case study on implementation, technical scheme of the present invention is further described again.In following example emulsion splitter, auxiliary agent and sorbent material add quality all with step 1. in the volume of Coal Chemical Industry height strong sewage to be dealt with for benchmark.
Embodiment 1
An oil removal treatment method for Coal Chemical Industry height strong sewage, comprises the steps:
1. sewage enters oil removing breakdown of emulsion processing unit, and in grease removal tank, add the embedding ether of emulsion splitter propylene glycol section, dosage is 200mg/L, and temperature is 25 DEG C, and the reaction times is 1h.The auxiliary agent added is anion pp amine, and dosage is 5mg/L.
2. the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit and removes the solid suspended particle of water and further oil removing by sorbent material, sorbent material is the mixture of gac and flyash, the ratio of mixture of gac and flyash is 1:1, and the dosage of gac and flyash is respectively 2.5g/L, 2.5g/L; Adsorption time 3 hours.
3. absorbing unit water outlet is filtered, retain sorbent material.
Table 1 deoiling effect
Embodiment 2
An oil removal treatment method for Coal Chemical Industry height strong sewage, comprises the steps:
1. sewage enters oil removing breakdown of emulsion processing unit, and in grease removal tank, add emulsion splitter isomery ten alcohol polyethers, dosage is 400mg/L, and temperature is 35 DEG C, and the reaction times is 2.5h.The auxiliary agent added is cation polypropylene amine, and dosage is 7.5mg/L.
2. the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit and removes the solid suspended particle of water and further oil removing by sorbent material, the mixture that sorbent material is gac and flyash, the ratio of mixture of gac and flyash is 1:2.5, and the dosage of gac and flyash is respectively 3g/L, 7.5g/L; Adsorption time 4 hours.
3. absorbing unit water outlet is filtered, retain sorbent material.
Table 2 deoiling effect
Embodiment 3
An oil removal treatment method for Coal Chemical Industry height strong sewage, comprises the steps:
1. sewage through equal quality regulate laggard enter oil removing breakdown of emulsion processing unit, in grease removal tank, add the mixture of emulsion splitter sulfuric acid and ten tetracosanol polyethers, ratio of mixture is 3:1, and its sulfuric acid dosage is 9g/L, and temperature is 40 DEG C, and the reaction times is 5h.The auxiliary agent added is diatomite, and dosage is 10mg/L.
2. the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit and removes the solid suspended particle of water and further oil removing by sorbent material, the mixture that sorbent material is gac and flyash, the ratio of mixture of gac and flyash is 1:4, and the dosage of gac and flyash is respectively 5g/L, 20g/L; Adsorption time 3 hours.
3. absorbing unit water outlet is filtered, retain sorbent material.
Table 3 deoiling effect
Embodiment 4
An oil removal treatment method for Coal Chemical Industry height strong sewage, comprises the steps:
1. sewage enters oil removing breakdown of emulsion processing unit, adds the mixture of emulsion splitter sulfuric acid and ten tetracosanol polyethers in grease removal tank, and ratio of mixture is 4.5:1, and its sulfuric acid dosage is 11g/L, and temperature is 40 DEG C, and the reaction times is 3h.The auxiliary agent added is cationic polyacrylamide, and dosage is 10mg/L.
2. the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit and removes the solid suspended particle of water and further oil removing by sorbent material, the mixture that sorbent material is gac and flyash, the ratio of mixture of gac and flyash is 1:3, and the dosage of gac and flyash is respectively 7.5g/L, 22.5g/L; Adsorption time 4.5 hours.
3. absorbing unit water outlet is filtered, retain sorbent material.
Table 3 deoiling effect
Claims (8)
1. an oil removal treatment method for Coal Chemical Industry height strong sewage, is characterized in that technical process is as follows: high strong sewage water inlet → oil removing breakdown of emulsion unit → absorbing unit → filtering basin → water outlet; Its concrete steps are as follows:
1. oil removing breakdown of emulsion unit: sewage enters oil removing breakdown of emulsion processing unit, adds emulsion splitter and auxiliary agent in grease removal tank, control temperature reacts; Wherein said emulsion splitter is the mixing emulsion splitter of polyether demulsification agent or sulfuric acid and polyether demulsification agent;
2. absorbing unit: the water outlet of oil removing breakdown of emulsion unit enters into absorbing unit, adds sorbent material and processes;
3. filtering basin: absorbing unit water outlet is filtered, retains sorbent material.
2. oil removal treatment method according to claim 1, is characterized in that the polyether demulsification agent described in step is 1. propylene glycol block ether, isomery ten alcohol polyethers or ten tetracosanol polyethers.
3. oil removal treatment method according to claim 1, when it is characterized in that the emulsion splitter described in step is 1. polyether demulsification agent, the volume ratio adding quality and sewage of emulsion splitter is 200 ~ 500mg/L.
4. oil removal treatment method according to claim 1, is characterized in that the mass ratio of sulfuric acid and polyether demulsification agent in the mixing emulsion splitter described in step is 1. 2 ~ 5:1.
5. oil removal treatment method according to claim 1, it is characterized in that step 1. in emulsion splitter for mixing emulsion splitter time, in emulsion splitter, the volume ratio adding quality and sewage of sulfuric acid is 8 ~ 12g/L.
6. oil removal treatment method according to claim 1, is characterized in that the temperature described in step is 1. 25 ~ 40 DEG C; Reaction times is 0.5 ~ 5h.
7. oil removal treatment method according to claim 1, it is characterized in that the auxiliary agent described in step be 1. anion pp amine, cation polypropylene amine or diatomaceous one or both; The volume ratio adding quality and sewage of auxiliary agent is 5 ~ 10mg/L.
8. oil removal treatment method according to claim 1, is characterized in that the sorbent material described in step is 2. the mixture of gac and flyash; The mass ratio of gac and flyash is 1:(1 ~ 4); The volume ratio that gac adds quality and sewage is 2.5 ~ 7.5g/L.
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| CN201510654489.9A CN105174552A (en) | 2015-10-12 | 2015-10-12 | Oil removing treatment method for coal chemical industry high-concentration sewage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668846A (en) * | 2016-01-15 | 2016-06-15 | 中国石油大学(华东) | Fine processing technology of coal chemical aromatics-containing wastewater |
| CN112047550A (en) * | 2020-08-28 | 2020-12-08 | 环球润博能源科技(北京)有限公司 | System and method for treating wastewater containing complex organic pollutants and ammonia nitrogen |
| CN113429019A (en) * | 2021-06-24 | 2021-09-24 | 广东省科学院资源利用与稀土开发研究所 | Method for purifying and removing oil from industrial waste water containing rare earth |
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| CN1037094A (en) * | 1988-11-07 | 1989-11-15 | 西安石油学院 | Efficient thick oil emulsion-breaking agent |
| CN1218113A (en) * | 1998-09-28 | 1999-06-02 | 周静 | Method for treating and recovering emulsion phase in extracting separation of raw rare earth materials |
| CN1594143A (en) * | 2004-06-24 | 2005-03-16 | 武汉化工学院 | Treatment method for gas wash water |
| CN101987762A (en) * | 2009-08-03 | 2011-03-23 | 上海未来企业有限公司 | Coking wastewater treatment device and coking wastewater posttreatment method |
| CN103304095A (en) * | 2013-05-27 | 2013-09-18 | 内蒙古包钢钢联股份有限公司 | Treatment method for improving removal rate of benzo (a) pyrene in coking wastewater |
| CN104261597A (en) * | 2014-10-27 | 2015-01-07 | 南京工业大学 | Pretreatment method for high concentration sewage in coal chemical industry |
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2015
- 2015-10-12 CN CN201510654489.9A patent/CN105174552A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037094A (en) * | 1988-11-07 | 1989-11-15 | 西安石油学院 | Efficient thick oil emulsion-breaking agent |
| CN1218113A (en) * | 1998-09-28 | 1999-06-02 | 周静 | Method for treating and recovering emulsion phase in extracting separation of raw rare earth materials |
| CN1594143A (en) * | 2004-06-24 | 2005-03-16 | 武汉化工学院 | Treatment method for gas wash water |
| CN101987762A (en) * | 2009-08-03 | 2011-03-23 | 上海未来企业有限公司 | Coking wastewater treatment device and coking wastewater posttreatment method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105668846A (en) * | 2016-01-15 | 2016-06-15 | 中国石油大学(华东) | Fine processing technology of coal chemical aromatics-containing wastewater |
| CN112047550A (en) * | 2020-08-28 | 2020-12-08 | 环球润博能源科技(北京)有限公司 | System and method for treating wastewater containing complex organic pollutants and ammonia nitrogen |
| CN113429019A (en) * | 2021-06-24 | 2021-09-24 | 广东省科学院资源利用与稀土开发研究所 | Method for purifying and removing oil from industrial waste water containing rare earth |
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Application publication date: 20151223 |