CN104609606A - Method for pretreating petrochemical wastewater - Google Patents
Method for pretreating petrochemical wastewater Download PDFInfo
- Publication number
- CN104609606A CN104609606A CN201510057121.4A CN201510057121A CN104609606A CN 104609606 A CN104609606 A CN 104609606A CN 201510057121 A CN201510057121 A CN 201510057121A CN 104609606 A CN104609606 A CN 104609606A
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- petrochemical wastewater
- coal
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- added
- petrochemical
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for pretreating petrochemical wastewater. The method comprises the following steps: crushing and grinding coals for generating heat and electricity in a petrochemical industrial park to obtain an ore grinding product of which particles of less than 200 meshes accounts for 70-85%; mixing the ore grinding product and the petrochemical wastewater in an agitating vessel according to a ratio of 100-250g/L; adding an acid solution with a certain concentration to adjust the pH value of the wastewater to 2-7; fully stirring for 5-10 minutes; adding an alkali solution to adjust the pH value to be neutral; and performing concentration and pressure filtration, wherein coal cakes after pressure filtration can be directly used for generating electricity and heat, and the filtrate is treated in a subsequent biochemical system. According to the method disclosed by the invention, the coal powder does not need any change of surface properties, and only needs simple crushing and grinding to ensure that the removal rate of COD (chemical oxygen demand) in the petrochemical wastewater reaches 60-70% and the chroma removal rate reaches 80-90%, thereby effectively reducing the load of the biochemical system. The method disclosed by the invention has the beneficial effects that the contaminant removal rate is high, the treatment pressure of the biochemical system is relieved, the treatment cost is low, and the operation is simple and convenient.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, is the method adopting coal dust absorption method pre-treatment petrochemical wastewater in particular.
Background technology
Petrochemical industry is main raw material with oil or Sweet natural gas, through a series of various processes process, working methods such as cracking, refining, fractionation, reformation, synthesis, produce the industry of various different petroleum products, man-made fiber, Organic Chemicals and chemical fertilizer.A large amount of waste water can be produced in production process, mainly comprise petroleum asphaltene, petrochemical wastewater, fertilizer industrial wastewater, chemical fibre industry waste water etc.Petrochemical wastewater quantity discharged is large, pollutant component is complicated, and containing materials such as toxic larger phenol, cyanogen, amine, alcohol, organic acid, organochlorines, owing to there being larger solubleness in water, general being difficult to is removed.
Petrochemical wastewater treatment process can be divided into according to removal principle difference: Physical, chemical method and biochemical process.Physical processing techniques, is mainly used in pre-treatment, alleviates the load of follow-up structures, and conventional method has oil removal, air supporting, absorption and membrane sepn etc.Wherein absorption method due to technique simple, easy to operate, economical, treatment effect is good and extensively pay close attention to by researchist, and wherein the selection of sorbent material is the key of absorption method.Find the focus that a kind of efficient, inexpensive sorbent material becomes people's concern.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provide a kind of petrochemical wastewater pretreatment process, the method is simple to operate, with low cost, respond well, has commercial introduction using value widely.
Technical scheme: a kind of petrochemical wastewater pretreatment process of the present invention, comprises the steps:
A, absorption coal fed in crusher and carries out fragmentation, obtain the breakdown products that granularity is less than 3mm;
B, breakdown products fed in ore mill and grinds, obtain grinding product, and in grinding product, granularity is less than the massfraction of 200 order materials is 70-85%;
C, petrochemical wastewater is delivered in agitation vat, and a certain amount of acid solution is added in agitation vat, the pH value regulating water body is 2-7, the grinding product from step b is added in agitation vat to being uniformly mixed 5-10min by the consumption of 100-250g/L, obtains coal and waste water mixture;
D, in coal and waste water mixture, add a certain amount of alkaline solution, regulate waste water ph to 6-9, and be delivered in thickner and concentrate, add flocculation agent and flocculation agent, obtain overflow water and concentrated underflow;
E, the concentrated underflow from steps d is fed filter-press dehydration in pressure filter, obtain filtrate and dehydration briquette;
F, the overflow water in above-mentioned steps d and e and filtrate merged, obtain pre-treatment water outlet, described petrochemical wastewater pre-treatment terminates.
Wherein: the pre-treatment water outlet in step f feeds sewage work's subsequent biochemical system and carries out biochemical treatment;
Dehydration briquette from step e is directly used in generating, heats or make coal water slurry generating.
As preferably: the acid solution added in described step c is sulphuric acid soln.
As preferably: the alkaline solution added in described steps d is NaOH solution or Na
2cO
3solution.
Further, the flocculation agent added in described steps d adopts inorganic salts flocculation agent.
Preferably: the flocculation agent added in described steps d is polyaluminium sulfate or bodied ferric sulfate.
Preferably: the flocculation agent added in described steps d is polyacrylamide.
Described absorption coal is not by the restriction of coal, and can be that petrochemical industrial park heats, electricity power enterprise's coal, can be the low-rank coal such as brown coal, long-flame coal, also can be the high-order such as coking coal, hard coal coal; In petrochemical wastewater and coal mixing process, add a certain amount of acid solution, adsorption effect is better.
Compared with prior art, its beneficial effect is in the present invention:
(1) coal dust required for the present invention does not need through traditional technological transformation or processing, and after simply levigate, namely to the adsorption effect that the pollutent in petrochemical wastewater has had, COD clearance can reach 60-70%, and chroma removal rate reaches 80-90%.
(2) be adsorbed with the coal dust of pollutent, can generate electricity, heat and reuse, realize the zero release of sorbent material, the organic pollutant be simultaneously adsorbed in coal dust is converted into CO through high-temp combustion
2and H
2o, realizes the thorough degraded of organic hard-degraded substance.
(3) the present invention utilizes coal dust adsorption treatment petrochemical wastewater, reduces the organic content of bio-refractory in petrochemical wastewater, reduces biochemical system load; Reduce sewage disposal investment and floor space, reduce Sewage disposal running cost, there is commercial introduction prospect widely.
Accompanying drawing explanation
Fig. 1 is the treatment scheme schematic diagram of petrochemical wastewater pretreatment process of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
Example 1, a kind of petrochemical wastewater pretreatment process, comprise the steps:
A, be that the absorption coal of long-flame coal feeds in crusher and carries out fragmentation by coal, obtain the breakdown products that granularity is less than 3mm;
B, breakdown products to be fed and carry out levigate in ore mill, obtain grinding product, in grinding product, granularity is less than the massfraction of 200 order materials is 85%;
C, be 3987mg/L by chemical oxygen demand (COD) value, colourity be 453 Cotton Pulp Wastewater be delivered in agitation vat, and sulphuric acid soln is added in agitation vat, the pH value regulating water body is 3, grinding product from step b is added in agitation vat by the consumption of 200g/L and is uniformly mixed, obtain coal and waste water mixture;
D, in coal and waste water mixture, add a certain amount of sodium hydroxide solution, regulate waste water ph to be 7, and be delivered in thickner and concentrate, add polyaluminium sulfate flocculation agent and polyacrylamide flocculant, obtain overflow water and concentrated underflow;
E, the concentrated underflow from steps d is fed filter-press dehydration in pressure filter, obtain filtrate and dehydration briquette;
F, the overflow water in above-mentioned steps d and e and filtrate merged, obtaining chemical oxygen demand (COD) value is 1245mg/L, and colourity is the pre-treatment water outlet of 58.8, and pre-treatment water outlet is fed to waste water treatment plant's subsequent biochemical system;
G, the dehydration briquette from step e is transported to neighbouring power plant and is used for generating.
Example 2, a kind of petrochemical wastewater pretreatment process, comprise the steps:
A, be that anthracitic absorption coal feeds in crusher and carries out fragmentation by coal, obtain the breakdown products that granularity is less than 3mm;
B, breakdown products to be fed and carry out levigate in ore mill, obtain grinding product, in grinding product, granularity is less than the massfraction of 200 order materials is 80%;
C, the petrochemical wastewater being 3526mg/L by chemical oxygen demand (COD) value are sent in agitation vat, and sulphuric acid soln is added in agitation vat, the pH value regulating water body is 3.5, grinding product from step b is added in agitation vat by the consumption of 200g/L and is uniformly mixed, obtain coal and waste water mixture;
D, in coal and waste water mixture, add a certain amount of calcium carbonate soln, waste water ph is adjusted to 7, and sent in thickner and concentrate, add bodied ferric sulfate flocculation agent and polyacrylamide flocculant, obtain overflow water and concentrated underflow;
E, the concentrated underflow from steps d is fed filter-press dehydration in pressure filter, obtain filtrate and dehydration briquette;
F, the overflow water in above-mentioned steps d and e and filtrate to be merged, obtain the pre-treatment water outlet that chemical oxygen demand (COD) value is 1291mg/L, and pre-treatment water outlet is fed to waste water treatment plant's biochemical system carry out biochemical treatment;
G, the dehydration briquette from step e is transported to neighbouring power plant and makes coal water slurry and be used for generating.
As mentioned above, although represented with reference to specific preferred embodiment and described the present invention, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (6)
1. a petrochemical wastewater pretreatment process, is characterized in that, comprises the steps:
A, absorption coal fed in crusher and carries out fragmentation, obtain the breakdown products that granularity is less than 3mm;
B, breakdown products fed in ore mill and grinds, obtain grinding product, and in grinding product, granularity is less than the massfraction of 200 order materials is 70-85%;
C, petrochemical wastewater is delivered in agitation vat, and a certain amount of acid solution is added in agitation vat, the pH value regulating water body is 2-7, the grinding product from step b is added in agitation vat to being uniformly mixed 5-10min by the consumption of 100-250g/L, obtains coal and waste water mixture;
D, in coal and waste water mixture, add a certain amount of alkaline solution, regulate waste water ph to 6-9, and be delivered in thickner and concentrate, add flocculation agent and flocculation agent, obtain overflow water and concentrated underflow;
E, the concentrated underflow from steps d is fed filter-press dehydration in pressure filter, obtain filtrate and dehydration briquette;
F, the overflow water in above-mentioned steps d and e and filtrate merged, obtain pre-treatment water outlet, described petrochemical wastewater pre-treatment terminates.
2. a kind of petrochemical wastewater pretreatment process according to claim 1, is characterized in that, the acid solution added in described step c is sulphuric acid soln.
3. a kind of petrochemical wastewater pretreatment process according to claim 1, is characterized in that, the alkaline solution added in described steps d is NaOH solution or Na
2cO
3solution.
4. a kind of petrochemical wastewater pretreatment process according to claim 1, is characterized in that, the flocculation agent added in described steps d adopts inorganic salts flocculation agent.
5. a kind of petrochemical wastewater pretreatment process according to claim 4, is characterized in that, the flocculation agent added in described steps d is polyaluminium sulfate or bodied ferric sulfate.
6. a kind of petrochemical wastewater pretreatment process according to claim 1, is characterized in that, the flocculation agent added in steps d is polyacrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057121.4A CN104609606B (en) | 2015-02-03 | 2015-02-03 | A kind of petrochemical wastewater preprocess method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057121.4A CN104609606B (en) | 2015-02-03 | 2015-02-03 | A kind of petrochemical wastewater preprocess method |
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| CN104609606A true CN104609606A (en) | 2015-05-13 |
| CN104609606B CN104609606B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461135A (en) * | 2015-12-01 | 2016-04-06 | 湖南永清环保研究院有限责任公司 | Pretreatment technology for high-concentration refractory organic petrochemical wastewater |
| CN105601055A (en) * | 2016-03-21 | 2016-05-25 | 中国矿业大学 | Semi-coke wastewater multi-level treatment technology |
| CN109530096A (en) * | 2019-01-07 | 2019-03-29 | 山西潞安集团余吾煤业有限责任公司 | A kind of floatation clean coal flocculation filter-press dehydration new process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101908A (en) * | 1987-03-10 | 1987-12-02 | 南京大学 | Absorption-coagulation or flotation treatment of dyeing and printing |
| CN1194238A (en) * | 1997-03-13 | 1998-09-30 | 杭州市四堡污水处理厂 | Method of removing heavy metal from industrial waste water |
-
2015
- 2015-02-03 CN CN201510057121.4A patent/CN104609606B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101908A (en) * | 1987-03-10 | 1987-12-02 | 南京大学 | Absorption-coagulation or flotation treatment of dyeing and printing |
| CN1194238A (en) * | 1997-03-13 | 1998-09-30 | 杭州市四堡污水处理厂 | Method of removing heavy metal from industrial waste water |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461135A (en) * | 2015-12-01 | 2016-04-06 | 湖南永清环保研究院有限责任公司 | Pretreatment technology for high-concentration refractory organic petrochemical wastewater |
| CN105601055A (en) * | 2016-03-21 | 2016-05-25 | 中国矿业大学 | Semi-coke wastewater multi-level treatment technology |
| CN105601055B (en) * | 2016-03-21 | 2019-03-29 | 中国矿业大学 | A kind of semi-coke wastewater multilevel processing technology |
| CN109530096A (en) * | 2019-01-07 | 2019-03-29 | 山西潞安集团余吾煤业有限责任公司 | A kind of floatation clean coal flocculation filter-press dehydration new process |
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| Publication number | Publication date |
|---|---|
| CN104609606B (en) | 2016-08-17 |
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