CN102478481A - Performance test method of flotation agent for treating oil-containing wastewater - Google Patents
Performance test method of flotation agent for treating oil-containing wastewater Download PDFInfo
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- CN102478481A CN102478481A CN2010105682511A CN201010568251A CN102478481A CN 102478481 A CN102478481 A CN 102478481A CN 2010105682511 A CN2010105682511 A CN 2010105682511A CN 201010568251 A CN201010568251 A CN 201010568251A CN 102478481 A CN102478481 A CN 102478481A
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Abstract
The invention discloses a performance test method of a flotation agent for treating oil-containing wastewater. The method comprises the following steps: adding the flotation agent to simulated wastewater, and stirring, pouring the resulting mixture into a simulation air flotation device; carrying out an air flotation process; rapidly pouring the floating floc in the air flotation device into an empty beaker and weighing; drying quantitative filter paper to a constant weight, taking the paper, cooling and weighing; filtering the collected floating floc, drying, cooling and weighing; calculating the floc floating rate according to the tested data, and analyzing the performance of the flotation agent according to the floc floating rate; and the like. According to the present invention, with testing the floc floating rate of the flotation agent, the performance of flotation agent and the sewage treatment effect of the flotation agent are analyzed, the test time is short, the test precision is high, and the test cost is reduced.
Description
Technical field
The present invention relates to a kind of performance test methods that is used to handle the flotation agent of oily waste water.
Background technology
In many municipal effluents and industrial waste water, the petroleum industry oily waste water is the most representative.Oil-containing wastewater is mainly from land and offshore oil exploitation, processing, transportation (accident and draining), industrial water drainage.Oil pollutant forms oil film on the water surface, the isolated atmosphere and the water surface destroy the excess oxygen of water body, and the minimizing of oxygen in water can cause planktonic organism in the water body because of anoxic death by suffocation; Also can limit the photosynthesis of hydrophyte such as algae, influence the self-cleaning of water body; Oil pollutant is attached to the soil particle surface, in soil, forms oil film, makes air be difficult to penetrate, and destroys soil and the eubolism of microorganism wherein, influences the normal growth of crops; In the biological treatment system, oil content exceeds standard will influence active sludge and biomembranous eubolism, and effluent quality is difficult to guarantee.Therefore, it is extremely necessary handling oily waste water.
Oil content in the oily waste water exists with oil slick, dispersed oil, oil emulsion and four kinds of forms of dissolving wet goods usually.Because the difference of existence form, the method for handling oily waste water is also just different.At present external oil-contaminated water of oil field is handled the facility that adopts and is mainly contained settling pit, oil interceptor, inclined plate grease pond, removes oil tank, coarse jar, pressure slurry tank, flotation cell (post), pressure filter, single valve filter tank, combined type treating apparatus, hydrocyclone and fine filter etc. except that oil tank, coagulation naturally.The affiliated facility that adopts has various buffering system jars (pond), reclaims water pot (pond), backwash tank (pond), slop oil tank, medicament establishing system, various water pump and oil-water metering facility etc.
In recent years, some new equipment have been developed in the processing of oily sewage (mainly being oil extraction-generated waste water) abroad, like novel closed float tank, hydrocyclone, various combined type oil-water separators etc.The successful exploitation of these devices is all of great advantage to integrated and the reduction equipment volume and the construction costs etc. of the treatment effect that improves oily sewage, the treatment efficiency that improves equipment, realization treatment facility function.
Yet be not that single method is handled oily waste water and just can be reached the effluent quality requirement, several kinds of disposal routes of actual waste water treatment project needs are combined into various treatment process system and handle oily waste water.Along with science and technology development, the improvement technology of oil-contaminated water of oil field is strengthened when constantly exploring and is improved both at home and abroad in recent years.According to the data from abroad introduction, the characteristics and the important symbol of new oilfield produced water treatment process are that hydrocyclone is introduced flow process, substitute traditional oil removal and flotation cells.In the U.S. North Sea oil field re-injection oil-containing sewage treatment technique flow process, adopted 3 oil-water separators and 6 hydrocyclone series connection, the water quality after the processing can reach the requirement of re-injection water.Wherein oil content is reduced to below 20～30mg/L by 200～500mg/L (mainly existing with O/W type form of emulsion).In addition, the many oil removal by air bubbling technology that adopted of the U.S.'s its treatment process in newly-built oily water treatment station.U.S.'s Gulf oilfield produced water processing technological flow is made up of unit such as oil-water separator, flocculation, air supporting, GAC-FBR (activated charcoal biological fluidized-bed reactor), electrodialysis; Handle back day maximum oil content and be no more than 10mg/L, reached very strict emission control standards.Many scholars' research shows, handles the condensed oil sewage that contains some hardly degraded organic substances and generally adopts the biochemical oxidation method, and its technological process mainly comprises unit operationss such as oil-water separator, air supporting, chemical oxidation, biological membrane hydrolysis acidification, filtration.
Developed and produced multiple sewage-treating agent in order to improve the oily waste water treatment effeciency, comprised coagulant, flocculating agent, flotation agent etc.Wherein the hydrophobic polymer flocculating agent can be accelerated water purification speed as efficient water treatment agent, removes suspension and noxious material in the water.The disposal route of oily waste water is also a lot, and particularly handle oily waste water and have the treatment effeciency height, the residence time is short, energy consumption is low, occupation of land is little by the turbine air flotation method for wherein air supporting method, control and characteristics easy to maintenance.Add flotation agent during air supporting and can not only obtain better air flotation effect, and can shorten the flocculation reaction time, this is to reducing capital expenditure, cutting down the consumption of energy and operating cost has great importance in the actual engineering.
When handling oily waste water, have only chemistry (oxidation) method, mixed condensed gas flotation process will use chemical agent and play a role usually, generally speaking, the oily waste water treating agent can be divided into two types, i.e. flocculating agent and flotation agent.
After feeding bubble in the oily waste water, be not any suspension can both with bubble adhesion, be not to float to the water surface successfully with bubble, the particle diameter of the wetting state of this and oil emulsion, the size of elaioleucite, bubble is closely bound up.Therefore, need in waste water, add suitable flotation agent, change the physicochemical property of the suspension in the waste water, thereby improve the oil removal efficiency of air supporting method.
Function according to flotation agent is different, and possible component has three types: (1) cationic polymer.High-molecular coagulant adopting can be divided into anionic, cationic and nonionic on structure.In recent years, the high-molecular coagulant adopting of anionic and nonionic has been brought into play important effect in water treatment field, uses extensivelyr, and treatment effect is good.But high for some contents of organic matter, form the aqueous systems of colloid; Microparticle surfaces has negative charge; Cause the high-molecular coagulant adopting of anionic and nonionic can not the very high particulate of catch surface current potential; Do not reach processing requirements, therefore the research and development of cationic coagulant and use receive people's attention day by day.In the technology of handling oily waste water, its major function is a compression oil droplet electrostatic double layer, increases droplet size, helps to improve oil removal efficiency; (2) reverse wetting agent, it can change the wetting state of suspension in the water, strengthens the adhesive efficiency of bubble and suspension, helps to improve oil removal efficiency; (3) frothing agent helps to reduce bubble diameter, and rolling action spumes in the air supporting process.
Macromolecule flotation agent plays irreplaceable effect with its good flocculating result and advantage such as easy and simple to handle in water treatment, cause both at home and abroad and pay close attention to widely.In general, all to measure the effect that transmittance is explained flotation agent processing oily waste water.And the flco come-up rate index that judges is only adopted in experiment, and does not measure its transmittance, and its reason is: at present, the technology that oily waste water is often handled materialization and biochemical treatment combines, and materialization is handled generally as pre-service or advanced treating.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art; A kind of performance test methods that is used to handle the flotation agent of oily waste water is provided; This method of testing is passed through the flco come-up rate of test flotation agent, thereby analyzes the performance of flotation agent and the effect of disposing of sewage, and the test duration is short; Measuring accuracy is high, has reduced testing cost.
The object of the invention is realized through following technical proposals: a kind of performance test methods that is used to handle the flotation agent of oily waste water may further comprise the steps:
(a) a certain amount of flotation agent adding is filled in the beaker of simulated wastewater, and pour into after stirring in the simulation air-floating apparatus;
(b) to the air of simulation air-floating apparatus feeding certain pressure, carry out the air supporting process;
(c) pour in the sky beaker fast the flco that floats in the air-floating apparatus and weighing;
(d) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(e) the come-up flco that will collect is dried after constant weight to the filter paper filtering of constant weight with having claimed in the step (d), and weighing is carried out in cooling;
(h) go out flco come-up rate according to the data computation that records, analyze the performance of flotation agent according to flco come-up rate.
In the said step (a), the content of simulated wastewater is 2%.
In the said step (c), ventilation 4min, and after leaving standstill 1min, the flco that floats in the air-floating apparatus is poured in the sky beaker fast.
In the said step (d), filter paper is placed in the measuring cup and dries.
In the said step (d), drying unit is 100 ℃ of baking ovens.
In the said step (d), drying time is 2h.
In sum, the invention has the beneficial effects as follows: through the flco come-up rate of test flotation agent, thereby analyze the performance of flotation agent and the effect of disposing of sewage, and the test duration is short, measuring accuracy is high, has reduced testing cost.
Embodiment
Below in conjunction with embodiment, the present invention is done further detailed description, but embodiment of the present invention is not limited only to this.
Embodiment:
A kind of performance test methods that is used to handle the flotation agent of oily waste water that the present invention relates to, its concrete steps are following:
(a) a certain amount of flotation agent adding is filled in the beaker of simulated wastewater, and pour into after stirring in the simulation air-floating apparatus;
(b) to the air of simulation air-floating apparatus feeding certain pressure, carry out the air supporting process;
(c) pour in the sky beaker fast the flco that floats in the air-floating apparatus and weighing;
(d) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(e) the come-up flco that will collect is dried after constant weight to the filter paper filtering of constant weight with having claimed in the step (d), and weighing is carried out in cooling;
(h) go out flco come-up rate according to the data computation that records, analyze the performance of flotation agent according to flco come-up rate.
The computing formula of flco come-up rate is following in the step (h):
In the formula: A-suspended solid+filter paper and measuring cup heavy (g)
B-filter paper and measuring cup heavy (g)
In the said step (a), the content of simulated wastewater is 2%.
In the said step (c), ventilation 4min, and after leaving standstill 1min, the flco that floats in the air-floating apparatus is poured in the sky beaker fast.
In the said step (d), filter paper is placed in the measuring cup and dries.
In the said step (d), drying unit is 100 ℃ of baking ovens.
In the said step (d), drying time is 2h.
In general, all to measure the effect that transmittance is explained flotation agent processing oily waste water.And the flco come-up rate index that judges is only adopted in experiment, and does not measure its transmittance, and its reason is: at present, the technology that oily waste water is often handled materialization and biochemical treatment combines, and materialization is handled generally as pre-service or advanced treating.The group technology of air supporting and biochemical technology has become a kind of sign of advanced in recent years oily waste water treatment process, for example: gravity oil removal → air supporting → biochemical treatment group technology; Oil removal → secondary air-floatation → A/O group technology; Chemical demulsification → two-stage air supporting → bio-contact oxidation group technology or the like.
The present invention mainly studies turbine air flotation and comes oil removing with flotation agent; And the turbine air flotation current are disturbed flow condition, and it is bigger to add dose, cause residual colourity in the waste water because of it contains surfactant; But in the biochemical treatment stage, these surfactants are that organism can be removed fully.Only need oleaginousness be lowered in the air supporting stage, the influent quality that satisfies the biochemical treatment stage requires to get final product, and therefore the transmittance of waste water is not measured in experiment.
Above-mentioned method of testing is passed through the flco come-up rate of test flotation agent, thereby analyzes the performance of flotation agent and the effect of disposing of sewage, and the test duration is short, and measuring accuracy is high, has reduced testing cost.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment did all fall within protection scope of the present invention.
Claims (6)
1. a performance test methods that is used to handle the flotation agent of oily waste water is characterized in that, may further comprise the steps:
(a) a certain amount of flotation agent adding is filled in the beaker of simulated wastewater, and pour into after stirring in the simulation air-floating apparatus;
(b) to the air of simulation air-floating apparatus feeding certain pressure, carry out the air supporting process;
(c) pour in the sky beaker fast the flco that floats in the air-floating apparatus and weighing;
(d) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(e) the come-up flco that will collect is dried after constant weight to the filter paper filtering of constant weight with having claimed in the step (d), and weighing is carried out in cooling;
(h) go out flco come-up rate according to the data computation that records, analyze the performance of flotation agent according to flco come-up rate.
2. a kind of performance test methods that is used to handle the flotation agent of oily waste water according to claim 1 is characterized in that in the said step (a), the content of simulated wastewater is 2%.
3. a kind of performance test methods that is used to handle the flotation agent of oily waste water according to claim 1 is characterized in that, in the said step (c), and ventilation 4min, and after leaving standstill 1min, the flco that floats in the air-floating apparatus is poured in the sky beaker fast.
4. a kind of performance test methods that is used to handle the flotation agent of oily waste water according to claim 1 is characterized in that in the said step (d), filter paper is placed in the measuring cup and dries.
5. a kind of performance test methods that is used to handle the flotation agent of oily waste water according to claim 1 is characterized in that in the said step (d), drying unit is 100 ℃ of baking ovens.
6. a kind of performance test methods that is used to handle the flotation agent of oily waste water according to claim 1 is characterized in that in the said step (d), drying time is 2h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105682511A CN102478481A (en) | 2010-11-22 | 2010-11-22 | Performance test method of flotation agent for treating oil-containing wastewater |
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| CN2010105682511A CN102478481A (en) | 2010-11-22 | 2010-11-22 | Performance test method of flotation agent for treating oil-containing wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076117A (en) * | 2014-07-17 | 2014-10-01 | 天津亿利科能源科技发展股份有限公司 | Water clarifier evaluating method suitable for oil-field gas floatation device |
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2010
- 2010-11-22 CN CN2010105682511A patent/CN102478481A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076117A (en) * | 2014-07-17 | 2014-10-01 | 天津亿利科能源科技发展股份有限公司 | Water clarifier evaluating method suitable for oil-field gas floatation device |
| CN104076117B (en) * | 2014-07-17 | 2016-08-24 | 天津亿利科能源科技发展股份有限公司 | A kind of water cleaning agent evaluation methodology of applicable oil field air-floating apparatus |
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Application publication date: 20120530 |