CN102478478A - Method for testing influence of hydrophobic monomer contents on air flotation effect of flotation agents - Google Patents
Method for testing influence of hydrophobic monomer contents on air flotation effect of flotation agents Download PDFInfo
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- CN102478478A CN102478478A CN2010105675965A CN201010567596A CN102478478A CN 102478478 A CN102478478 A CN 102478478A CN 2010105675965 A CN2010105675965 A CN 2010105675965A CN 201010567596 A CN201010567596 A CN 201010567596A CN 102478478 A CN102478478 A CN 102478478A
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Abstract
The invention discloses a method for testing influence of hydrophobic monomer contents on air flotation effect of flotation agents, which comprises the following steps: preparing flotation agents with different hydrophobic monomer contents; respectively adding the flotation agents with different hydrophobic monomer contents into simulated waste water, evenly stirring, and pouring into different simulated air flotation devices; carrying out an air flotation process on all the simulated air flotation devices; weighing floating flocculates in all the air flotation devices; after filtering the collected floating flocculates, drying, cooling and weighing; and analyzing the influence of different hydrophobic monomer contents on the air flotation effect of the flotation agents according to the measured data. The invention can quickly test the influence of the hydrophobic monomer contents on the air flotation effect of the flotation agents, thereby determining the optimal hydrophobic monomer content of the flotation agent. The invention has the advantages of simple testing steps, high testing accuracy and low testing cost.
Description
Technical field
The present invention relates to the method for testing of a kind of hydrophobic monomer content to the influence of flotation agent air flotation effect.
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.
There is very big influence in hydrophobic monomer content to its air flotation effect in the flotation agent.Its former because: hydrophobic monomer content is few, and the flco hydrophobicity is not strong, and is therefore not strong with the adhesive capacity of bubble, and cause air flotation effect bad.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art; The method of testing of a kind of hydrophobic monomer content to the influence of flotation agent air flotation effect is provided; This method of testing can test out the influence of hydrophobic monomer content to the flotation agent air flotation effect fast, thereby determines the best hydrophobic monomer content of flotation agent, and testing procedure is simple; Measuring accuracy is high, and testing cost is low.
The object of the invention is realized through following technical proposals: a kind of hydrophobic monomer content may further comprise the steps the method for testing of flotation agent air flotation effect influence:
(a) the hydrophobic polymer flocculating agent of the different hydrophobic monomer content of preparation;
(b) then that the hydrophobic polymer flocculating agent of different hydrophobic monomer content is composite with surfactant and dispersion medium respectively, make the flotation agent of different hydrophobic monomer content;
(c) flotation agent with different hydrophobic monomer content adds respectively in the different beakers that fill simulated wastewater by identical amount, and pours into after stirring in the different simulation air-floating apparatus;
(d) all are simulated the air that air-floating apparatus all feed certain pressure, carry out the air supporting process;
(e) all pour in the sky beaker fast the flco that floats in all air-floating apparatus and weighing;
(f) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(g) the come-up flco that will collect is used respectively and has been claimed in the step (f) to the filter paper filtering of constant weight, to dry after constant weight, and weighing is carried out in cooling;
(h) calculate flco come-up rate respectively according to the data that record, analyzing different hydrophobic monomer content according to flco come-up rate influences the flotation agent air flotation effect.
In the said step (c), the content of simulated wastewater is 2%.
In the said step (e), 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 (f), filter paper is placed in the measuring cup and dries.
In the said step (f), drying unit is 100 ℃ of baking ovens.
In the said step (f), drying time is 2h.
Said hydrophobic monomer is a methyl methacrylate.
In sum, the invention has the beneficial effects as follows: can test out the influence of hydrophobic monomer content to the flotation agent air flotation effect fast, thereby determine the best hydrophobic monomer content of flotation agent, and testing procedure is simple, measuring accuracy is high, and testing cost is low.
Description of drawings
Fig. 1 is the influence curve figure of hydrophobic monomer content to air flotation effect.
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 hydrophobic monomer content that the present invention relates to is to the method for testing of flotation agent air flotation effect influence, and its concrete steps are following:
(a) the hydrophobic polymer flocculating agent of the different hydrophobic monomer content of preparation;
(b) then that the hydrophobic polymer flocculating agent of different hydrophobic monomer content is composite with surfactant and dispersion medium respectively, make the flotation agent of different hydrophobic monomer content;
(c) flotation agent with different hydrophobic monomer content adds respectively in the different beakers that fill simulated wastewater by identical amount, and pours into after stirring in the different simulation air-floating apparatus;
(d) all are simulated the air that air-floating apparatus all feed certain pressure, carry out the air supporting process;
(e) all pour in the sky beaker fast the flco that floats in all air-floating apparatus and weighing;
(f) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(g) the come-up flco that will collect is used respectively and has been claimed in the step (f) to the filter paper filtering of constant weight, to dry after constant weight, and weighing is carried out in cooling;
(h) calculate flco come-up rate respectively according to the data that record, analyzing different hydrophobic monomer content according to flco come-up rate influences the flotation agent air flotation effect.
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 (c), the content of simulated wastewater is 2%.
In the said step (e), 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 (f), filter paper is placed in the measuring cup and dries.
In the said step (f), drying unit is 100 ℃ of baking ovens.
In the said step (f), drying time is 2h.
Said hydrophobic monomer is a methyl methacrylate.
Result through said method records is as shown in Figure 1, as can beappreciated from fig. 1, hydrophobic monomer content after a little while, the flco of generation sinks in a large number, on float to the water surface flco leave standstill still some sinking after a period of time.This possibly be with polymkeric substance in hydrophobic grouping content few, the flco hydrophobicity is not strong, and is therefore not strong with the adhesive capacity of bubble, and causes air flotation effect bad.Observation experiment, along with the increase of hydrophobic monomer content, air flotation effect significantly improves.But hydrophobic monomer is too much, and air flotation effect descends on the contrary, possibly be that the adding of hydrophobic monomer influences polymerization, and influence the water-soluble of polymkeric substance, makes air flotation effect bad.Therefore, determining best hydrophobic monomer content is 4%.
Above-mentioned method of testing can test out the influence of hydrophobic monomer content to the flotation agent air flotation effect fast, thereby determines the best hydrophobic monomer content of flotation agent, and testing procedure is simple, and measuring accuracy is high, and testing cost is low.
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 (7)
1. a hydrophobic monomer content is characterized in that the method for testing that the flotation agent air flotation effect influences, and may further comprise the steps:
(a) the hydrophobic polymer flocculating agent of the different hydrophobic monomer content of preparation;
(b) then that the hydrophobic polymer flocculating agent of different hydrophobic monomer content is composite with surfactant and dispersion medium respectively, make the flotation agent of different hydrophobic monomer content;
(c) flotation agent with different hydrophobic monomer content adds respectively in the different beakers that fill simulated wastewater by identical amount, and pours into after stirring in the different simulation air-floating apparatus;
(d) all are simulated the air that air-floating apparatus all feed certain pressure, carry out the air supporting process;
(e) all pour in the sky beaker fast the flco that floats in all air-floating apparatus and weighing;
(f) quantitative filter paper is dried to constant weight, take out cooling back weighing;
(g) the come-up flco that will collect is used respectively and has been claimed in the step (f) to the filter paper filtering of constant weight, to dry after constant weight, and weighing is carried out in cooling;
(h) calculate flco come-up rate respectively according to the data that record, analyzing different hydrophobic monomer content according to flco come-up rate influences the flotation agent air flotation effect.
2. a kind of hydrophobic monomer content according to claim 1 is characterized in that to the method for testing of flotation agent air flotation effect influence in the said step (c), the content of simulated wastewater is 2%.
3. a kind of hydrophobic monomer content according to claim 1 is characterized in that the method for testing of flotation agent air flotation effect influence, in the said step (e), 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 hydrophobic monomer content according to claim 1 is characterized in that to the method for testing of flotation agent air flotation effect influence in the said step (f), filter paper is placed in the measuring cup and dries.
5. a kind of hydrophobic monomer content according to claim 1 is characterized in that to the method for testing of flotation agent air flotation effect influence in the said step (f), drying unit is 100 ℃ of baking ovens.
6. a kind of hydrophobic monomer content according to claim 1 is characterized in that to the method for testing of flotation agent air flotation effect influence in the said step (f), drying time is 2h.
7. according to the method for testing of each described a kind of hydrophobic monomer content in the claim 1～6, it is characterized in that said hydrophobic monomer is a methyl methacrylate to the influence of flotation agent air flotation effect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105675965A CN102478478A (en) | 2010-11-22 | 2010-11-22 | Method for testing influence of hydrophobic monomer contents on air flotation effect of flotation agents |
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| CN2010105675965A CN102478478A (en) | 2010-11-22 | 2010-11-22 | Method for testing influence of hydrophobic monomer contents on air flotation effect of flotation agents |
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Application publication date: 20120530 |