CN102463037A - Method for evaluating polluting property of filtered liquid - Google Patents
Method for evaluating polluting property of filtered liquid Download PDFInfo
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- CN102463037A CN102463037A CN201010549721XA CN201010549721A CN102463037A CN 102463037 A CN102463037 A CN 102463037A CN 201010549721X A CN201010549721X A CN 201010549721XA CN 201010549721 A CN201010549721 A CN 201010549721A CN 102463037 A CN102463037 A CN 102463037A
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Abstract
The invention relates to a method for evaluating the polluting property of filtered liquid on a filtering film, wherein an evaluation experiment is rapidly carried out through a miniature evaluation device and a little of the filtered liquid, The polluting substance type of the filtered liquid on the filtering film can be accurately judged according to the relationship among total irreversible resistance growth rate B, irreversible resistance growth rate B' of colloids and dissolvable substances and irreversible resistance growth rate B'' of the dissolvable substances, determined by the miniature evaluation device; and faults resulted from experience insufficiency can be effectively avoided. The method is very suitable for evaluating the polluting property of strange filtered liquid on the filtering film; the polluting substance type on the filtering film can be accurately judged by adopting the method; and the engineering operation risk is reduced; furthermore, engineering evaluation and consumption of manpower, material resources and time during the early design stage can be greatly reduced.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to the method that a kind of film polluting property is estimated.
Background technology
In recent years; Membrane separation technique has obtained fairly large development and application in fields such as food processing, desalinization, environmental protection, medicine, biology, pure water and ultra-pure water preparations, and being filtered liquid becomes membrane technology to the evaluation of the polluting property that filters filter membrane and research and development antipollution filter membrane and be able to continuous development key.
Ultrafiltration and micro-filtration all are the interdiction capabilities that utilize porous material, and the mode of holding back with physics is removed in the water a certain size impurity particle.Under pressure-driven; Water in the solution, organic low molecular, the material that the inorganic ions equidimension is little can arrive the opposite side of film through the micropore on the fibre wall; Large scale materials such as thalline, colloid, particle, organic macromolecule then can not and be trapped through fibre wall in the solution, thereby reach the purpose of different component in the screening solution.Ultrafiltration and micro-filtration use at normal temperatures, and strainability is reliable, accuracy is high, do not need that dosing can reach separation, concentrates, the purpose of purifying classification.Have simple in structure, easy to operate, floor space is little, be easy to dilatation and increase advantages such as assembly, obtains increasing application in water treatment field in recent years.
Yet because bacterium, colloid, suspended solid and soluble high-molecular compound etc. all are trapped in the film surface, these are multifactor all will to cause the filter membrane film properties that is in operation unstable or descend, and make engineering be difficult to be in normal operating conditions.Therefore before ultrafiltration or micro-filtration engineering design and operation; It is most important to the polluting property that filters filter membrane that evaluation is filtered liquid; It not only can propose corresponding processing method to producing the material that pollutes to filtering filter membrane, instructs engineering design effectively; Stable, running status, and the service life of removing pollutant mass-energy prolongation film rationally and effectively efficiently that the system of assurance is in.
At present, evaluation and judgement are filtered liquid the polluting property that filters filter membrane are mainly contained following two kinds of methods: 1. confirm to be filtered in the liquid to filtering the possible material type that filter membrane produces pollution through designer or operations staff's engineering experience in the past; 2. confirm to filter the pollution situation of filter membrane through the medium-scale test that is filtered liquid.Though first method saves time, receive self experience influence of design, operations staff, possible the polluter type accuracy of confirming is relatively poor, actual operating state with infer the unpredictable difference of the normal appearance of operation conditions; Second method confirms to be filtered liquid to filtering the polluting property of filter membrane through pilot scale; And according to polluter type proposition corresponding pre-treatment technology; Though this method has guaranteed to be filtered liquid to a certain extent to filtering the accuracy that the filter membrane pollution situation is confirmed, has problems such as experimentation cost height, length consuming time.If therefore adopt above-mentioned two kinds of method evaluations to be filtered liquid may cause engineering failure or forfeiture engineering chance to the polluting property that filters filter membrane danger; For example: for the strange liquid that is filtered; Possibly produce the material type that pollutes deviation arranged filtering filter membrane through what experience was confirmed, cause that system's filter membrane in running is seriously polluted, pressure reduction superelevation and shutting down; For many middle or small engineerings, adopt the pilot plant test over a long time that is filtered liquid to confirm that the method for the material type that generation is polluted to the filtration filter membrane also is infeasible.
Summary of the invention
The present invention is exactly the problem points in view of above-mentioned previous methods, and its purpose is to provide a kind of evaluation to be filtered the method for liquid to the polluting property of filtration filter membrane.Simple, the operation easily of this method step.
Evaluation ultrafiltration of the present invention or micro-filtration are filtered the method for liquid to the polluting property of filtration filter membrane, mainly comprise:
(1) use small-sized evaluating apparatus to confirm to be filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid ";
(2) according to total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and dissolved matter irreversible resistance growth rate B " the judgement material type that generation is polluted to filtering film component.
Above-mentioned (1) uses small-sized evaluating apparatus to confirm to be filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " step be:
Step 1: adopt the filter of miillpore filter, under the condition of constant voltage, use the 0.2-0.45 micron to filter and be filtered liquid 2000-3000 milliliter, obtain new liq A; Use the filtering with microporous membrane of 0.025-0.05 micron to be filtered liquid 2000-3000 milliliter, obtain new liq B;
Step 2: under the membrane module filter pressure of setting, adopt small-sized evaluating apparatus filter with step 1 in identical be filtered liquid 50-100 milliliter as one-period, measure the filtered water value under the different filtration times simultaneously; Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value under the different filtration times of metering through Darcy formula and filter filtration resistance corresponding under the water yield in difference, calculating membrane module promptly is the total irreversible resistance growth rate B that is filtered liquid in total filtration resistance average growth rate value of filtering under the water yield;
Step 3: with the new liq A that obtains in the step 1 as being filtered liquid A; Under the membrane module filter pressure of setting; Adopt small-sized evaluating apparatus to filter new liq A 50-100 milliliter, measure the filtered water value A under the different filtration times simultaneously as one-period; Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value A under the different filtration times of metering through Darcy formula and filter filtration resistance A corresponding under the water yield in difference, calculating membrane module promptly is colloid and the dissolved matter irreversible resistance growth rate B ' that is filtered liquid at total filtration resistance average growth rate value A that filters under the water yield;
Step 4: with the new liq B that obtains in the step 1 as being filtered liquid B; Under the membrane module filter pressure of setting; Adopt small-sized evaluating apparatus to filter new liq B 50-100 milliliter, measure the filtered water value B under the different filtration times simultaneously as one-period; Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value B under the different filtration times of metering through Darcy formula and filter filtration resistance B corresponding under the water yield in difference, calculating membrane module promptly is the dissolved matter irreversible resistance growth rate B that is filtered liquid at total filtration resistance average growth rate value B that filters under the water yield ".
Wherein, calculate membrane module in total filtration resistance average growth rate of filtering under the water yield, promptly according to shown in Figure 2 through the filtration resistance value to the filtered water value equal slope of making even, this G-bar value a promptly is the filtration resistance average growth rate of always filtering under the water yield.
Above-mentioned (2) are according to total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and dissolved matter irreversible resistance growth rate B " judge that the method for the material type that generation is polluted to membrane module is:
As B ≈ B ' ≈ B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B ≈ B '＞B " time, it is colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with colloidal substance;
As B ≈ B '＜B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B＞B ' ≈ B " time, it is suspension material and dissolved matter that membrane module is produced the material type that pollutes, and is main with the suspension material;
As B＞B '＞B " time, it is suspension material, colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with suspension material and colloidal substance;
As B＞B ' and B '＜B " time, it is suspension material and dissolved matter that membrane module is produced the material type that pollutes;
As B＜B ' ≈ B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B＜B ' and B '＞B " time, it is colloidal substance that membrane module is produced the material type that pollutes;
As B＜B '＜B " time, it is colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with dissolved matter;
Wherein, " ≈ ", "＞", "＜" is illustrated as: when the scope of B ' is between 0.5B (comprising 0.5B) and the 1.5B (comprising 1.5B) time, be recited as B ≈ B ', the error in judgement scope of all the other " ≈ " is identical; When the scope of B during greater than 1.5B ', be recited as B＞B ', the error in judgement scope of all the other "＞" is identical; When the scope of B is during less than 0.5B ', be recited as B＜B ', the error in judgement scope of all the other "＜" is identical.
Above-mentioned small-sized evaluating apparatus comprise store be filtered the fluid pressure jar, be filtered liquid stirring equipment, the filter of membrane module, product water measuring equipment, air machinery and miillpore filter.
In sum, main feature of the present invention is:
Through small-sized evaluating apparatus and a spot of liquid that is filtered, carry out evaluation experimental fast.The total irreversible resistance growth rate B, colloid and the dissolved matter irreversible resistance growth rate B ' that are filtered liquid and the dissolved matter irreversible resistance growth rate B that confirm according to small-sized evaluating apparatus " between relation; judge that more exactly being filtered liquid produces the material type that pollutes to filtering filter membrane, has avoided owing to the error of lacking experience and being caused effectively; Be highly suitable for estimating strange liquid the confirming that be filtered to the polluting property that filters filter membrane; Adopt the method accurately to judge and produce the material type that pollutes filtering filter membrane; Reduce the engineering operational risk, and significantly reduced engineering evaluation and the design human and material resources and the time loss in early stage.
Description of drawings
Fig. 1 is small-sized evaluating apparatus evaluation experimental part simplified schematic diagram.
The expression content of each symbol, 1: strainer valve, 2: back flush valve, 3: produce water valve, 4: flush discharge valve, 5: be filtered the fluid pressure jar, 6: liquid stirring equipment, 7: pure water pressurized tank, 8: membrane module, 9: produce the water measuring equipment, 10: pressure gauge.
Fig. 2 is the different filtration resistance figure that filter correspondence under the water yield of membrane module.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done to specify further.
Permanganate index (COD among the embodiment
Mn) mensuration according to the difference of former water chloride ion content, adopt permanganate index acid process or basic process (State Standard of the People's Republic of China GB119114-89); The mensuration of turbidity adopts the transmissometer (model: HACH 2100AN) of U.S. Hash company; The mensuration of electrical conductivity adopts the portable conductivity meter (model: HACH Sension 5) of U.S. Hash company; The mensuration of pH adopts the portable pH meter (model: HACH Sension2) of U.S. Hash company; Iron adopts the inductively coupled plasma emission spectrometer (model: ICPE-9000) of Tianjin, island company with the mensuration of total manganese.
Be filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " mensuration, below each specific embodiment all adopt following steps:
Step 1: adopt the filter of miillpore filter, under the condition of constant voltage, use the 0.2-0.45 micron to filter and be filtered liquid 2000-3000 milliliter, obtain new liq A; Use the filtering with microporous membrane of 0.025-0.05 micron to be filtered liquid 2000-3000 milliliter, obtain new liq B;
Step 2: will be filtered fluid pressure jar 5, be filtered liquid stirring equipment 6, pure water pressurized tank 7, membrane module 8, produce water measuring equipment 9, pressure gauge 10, air machinery and connect by mode shown in Figure 1.Under the membrane module filter pressure 100kPa that sets, open strainer valve 1 and produce water valve 3, adopt small-sized evaluating apparatus to filter and be filtered 50 milliliters of liquid; Close strainer valve 1 and produce water valve 3, open back flush valve 2 and flush discharge valve 4, with 5 milliliters of back flush membrane modules of pure water; Close back flush valve 2 and flush discharge valve 4, open strainer valve 1 and flush discharge valve 4, with being filtered 10 milliliters of liquid forward flushing membrane assemblies; Accomplish the filtration-cleaning step of one-period; Repeat 30 cycles of filtration-cleaning step; Obtain membrane module through the filtered water value under the different filtration times of metering through Darcy formula and filter filtration resistance corresponding under the water yield in difference, calculating membrane module promptly is the total irreversible resistance growth rate B that is filtered liquid in total filtration resistance average growth rate value of filtering under the water yield;
Step 3: as being filtered liquid A, under the membrane module filter pressure of setting, adopt small-sized evaluating apparatus to filter 50 milliliters of new liq A the new liq A that obtains in the step 1, measure the filtered water value A under the different filtration times simultaneously as one-period; Then, with 5 milliliters of back flush membrane modules of pure water, be filtered liquid forward flushing membrane assembly, the filtration-cleaning step of completion one-period with 10 milliliters; Repeat 30 cycles of filtration-cleaning step; Obtain membrane module through the filtered water value A under the different filtration times of metering through Darcy formula and filter filtration resistance A corresponding under the water yield in difference, calculating membrane module promptly is colloid and the dissolved matter irreversible resistance growth rate B ' that is filtered liquid at total filtration resistance average growth rate value A that filters under the water yield;
Step 4: as being filtered liquid B, under the membrane module filter pressure of setting, adopt small-sized evaluating apparatus to filter 50 milliliters of new liq B the new liq B that obtains in the step 1, measure the filtered water value B under the different filtration times simultaneously as one-period; Then, with 5 milliliters of back flush membrane modules of pure water, be filtered liquid forward flushing membrane assembly, the filtration-cleaning step of completion one-period with 10 milliliters; Repeat 30 cycles of filtration-cleaning step; Obtain membrane module through the filtered water value B under the different filtration times of metering through Darcy formula and filter filtration resistance B corresponding under the water yield in difference, calculating membrane module promptly is the dissolved matter irreversible resistance growth rate B that is filtered liquid at total filtration resistance average growth rate value B that filters under the water yield ".
Judge total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B be filtered liquid " between relation; symbol " ≈ "; "＞"; "＜" is illustrated as: when the scope of B ' is between 0.5B (comprising 0.5B) and the 1.5B (comprising 1.5B) time, be recited as B ≈ B ', the error in judgement scope of all the other " ≈ " is identical; When the scope of B during greater than 1.5B ', be recited as B＞B ', the error in judgement scope of all the other "＞" is identical; When the scope of B is during less than 0.5B ', be recited as B＜B ', the error in judgement scope of all the other "＜" is identical.
Embodiment 1
The former water a in certain face of land is adopted in this test, and the water quality situation is as shown in table 1.Visible by table 1, raw water quality is better, belongs to II class water body.
Table 1 raw water quality table
| Index | Turbidity (NTU) | ?COD Mn(mg/L) | Electrical conductivity (μ s/cm) | pH |
| Raw water quality | 12.9 | ?2.93 | 443 | 7.4 |
It is 150000 that hollow fiber ultrafiltration membrane, the molecular cut off of filter membrane are used in experiment, and material is a Kynoar.
By above-mentioned steps experimentize and calculate after obtain being filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " like table 2.
The irreversible resistance growth rate of the former water a of table 2
| B(10 12/m 2) | B’(10 12/m 2) | B”(10 12/m 2) | |
| Former water a | 0.403 | 0.262 | 0.244 |
According to above-mentioned " ≈ ", "＞", the judgement illustration method of "＜" can be known, B＞B ' ≈ B ", it is suspension material and dissolved matter that membrane module is produced the material type that pollutes, and is main with the suspension material; Use this kind hollow fiber ultrafiltration membrane to filter former water a through this method evaluation; It is main with suspended material that membrane module is produced the main matter type of polluting; Therefore in the ultrafiltration engineering, adopt the preformed precipitate method to remove the suspended material in the former water; Membrane module pressure reduction increasess slowly in running, system's operation steady in a long-term.Carry out former water quality evaluation quickly and efficiently through this method, can select treatment process exactly for use for major pollutants matter.
Embodiment 2
The former water b in certain face of land is adopted in this test, and the water quality situation is as shown in table 3.Visible by table 3, raw water quality belongs to III class water body.
Table 3 raw water quality table
| Index | Turbidity (NTU) | COD Mn(mg/L) | Electrical conductivity (μ s/cm) | pH | Iron (mg/L) |
| Raw water quality | ?28.1 | 3.68 | 562 | 7.31 | ?0.4 |
It is 0.02 micron that hollow fiber ultrafiltration membrane A, the aperture of filter membrane are used in experiment, and material is a Kynoar.
By above-mentioned steps experimentize and calculate after obtain being filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " like table 4.
The irreversible resistance growth rate of the former water b of table 4 (milipore filter A)
| B(10 12/m 2) | B’(10 12/m 2) | B”(10 12/m 2) | |
| Former water b | 0.389 | 0.413 | 0.457 |
According to above-mentioned " ≈ ", "＞", the judgement illustration method of "＜" can be known, B ≈ B ' ≈ B ", it is dissolved matter that milipore filter A is produced the material type that pollutes; Use hollow fiber ultrafiltration membrane A to filter former water b through this method evaluation, it is dissolved matter that milipore filter A is produced the main matter type of polluting, and therefore recommends to select for use the littler milipore filter in aperture to help the removal of dissolved matter.
Change original milipore filter, the new milipore filter B molecular cut off that uses was 150000 (aperture is about 0.01 micron), and material is a Kynoar.
By above-mentioned steps experimentize and calculate after obtain being filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " like table 5.
The irreversible resistance growth rate of the former water b of table 5 (milipore filter B)
| B(10 12/m 2) | B’(10 12/m 2) | B”(10 12/m 2) | |
| Former water b | 0.150 | 0.225 | 0.212 |
According to above-mentioned " ≈ ", "＞", the judgement illustration method of "＜" can be known, B ≈ B ' ≈ B ", it is dissolved matter that membrane module is produced the material type that pollutes; Use hollow fiber ultrafiltration membrane B to filter former water b through this method evaluation; Membrane module B is produced main matter type or the dissolved matter that pollutes; But when using milipore filter B to filter; Total irreversible resistance growth rate B, colloid and the dissolved matter irreversible resistance growth rate B ' of former water b and dissolved matter irreversible resistance growth rate B " all low when using milipore filter A, explain that the antifouling property of milipore filter B is strong for former water b.Therefore in the ultrafiltration engineering, adopt milipore filter B that former water b is carried out Direct Filtration, the membrane module pollution level is low, system's operation steady in a long-term.Carry out former water quality evaluation quickly and efficiently through this method, select suitable membrane module for use, greatly reduce the engineering operation risk to the polluter type.
Embodiment 3
The former water c in certain face of land is adopted in this test, and the water quality situation is as shown in table 6.Visible by table 6, former water intermediate ion concentration is high, pollutes more serious.
Table 6 raw water quality table
| Index | Turbidity (NTU) | COD Mn(mg/L) | Electrical conductivity (ms/cm) | pH |
| Raw water quality | ?32.3 | 5.14 | 41.7 | 7.96 |
It is 0.1 micron that hollow fiber microfiltration membrane, the aperture of filter membrane are used in experiment, and material is a Kynoar.
By above-mentioned steps experimentize and calculate after obtain being filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " like table 7.
The irreversible resistance growth rate (micro-filtration membrane) of the former water c of table 7
| B(10 12/m 2) | B’(10 12/m 2) | B”(10 12/m 2) | |
| Former water c | 1.45 | 0.89 | 0.46 |
According to above-mentioned " ≈ ", "＞", the judgement illustration method of "＜" can be known, B＞B '＞B ", it is suspension material, colloidal substance and dissolved matter that membrane module is produced the material type that pollutes; Because total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of former water c " all high; therefore recommend to carry out former water coagulation-deposition; purify water; reduce pollution, and can select for use the littler milipore filter in aperture to help the removal of dissolved matter to membrane module.
Change original micro-filtration membrane, the new milipore filter C molecular cut off that uses is 100000, and material is a Kynoar.
Former water c adds ferric trichloride coagulation, post precipitation, supernatant experimentize by above-mentioned steps and calculate after obtain being filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " like table 8.
The irreversible resistance growth rate of the former water c of table 8 (milipore filter C)
| B(10 12/m 2) | B’(10 12/m 2) | B”(10 12/m 2) | |
| Former water c | 0.106 | 0.094 | 0.218 |
According to above-mentioned " ≈ ", "＞", the judgement illustration method of "＜" can be known, B ≈ B '＜B ", it is dissolved matter that membrane module is produced the material type that pollutes; Explain that former water removed most suspended substances matter and colloidal substance in the water through coagulation, depositing technology, when re-using hollow fiber ultrafiltration membrane C and filtering former water c, produce the material type that pollutes and become dissolved matter filtering filter membrane; When using milipore filter C to filter; Total irreversible resistance growth rate B, colloid and the dissolved matter irreversible resistance growth rate B ' of former water c and dissolved matter irreversible resistance growth rate B " all obviously reduce when using micro-filtration membrane, explain that the former water c after filtration coagulation, the precipitation process is not remarkable to the contaminative of milipore filter C.Therefore in the ultrafiltration engineering, earlier former water c is carried out coagulation, precipitation process, adopt milipore filter C to filter again, the membrane module pollution level is low.Carry out former water quality evaluation quickly and efficiently through this method,, effectively reduce the engineering system operation risk under the abominable water quality to the suitable treatment process of polluter type selecting.
Claims (4)
1. estimate ultrafiltration or micro-filtration and be filtered the method for liquid for one kind, it is characterized in that: mainly comprise the polluting property that filters filter membrane:
(1) use small-sized evaluating apparatus to confirm to be filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid ";
(2) according to total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and dissolved matter irreversible resistance growth rate B " the judgement material type that generation is polluted to filtering film component.
2. evaluation according to claim 1 is filtered the method for liquid to the polluting property that filters filter membrane, and it is characterized in that: described (1) uses small-sized evaluating apparatus to confirm to be filtered total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and the dissolved matter irreversible resistance growth rate B of liquid " step be:
Step 1: adopt the filter of miillpore filter, under the condition of constant voltage, use the 0.2-0.45 micron to filter and be filtered liquid 2000-3000 milliliter, obtain new liq A; Use the filtering with microporous membrane of 0.025-0.05 micron to be filtered liquid 2000-3000 milliliter, obtain new liq B;
Step 2: under the membrane module filter pressure of setting, adopt small-sized evaluating apparatus filter with step 1 in identical be filtered liquid 50-100 milliliter as one-period, measure the filtered water value under the different filtration times simultaneously;
Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value under the different filtration times of metering through Darcy formula and filter filtration resistance corresponding under the water yield in difference, calculating membrane module promptly is the total irreversible resistance growth rate B that is filtered liquid in total filtration resistance average growth rate value of filtering under the water yield;
Step 3: with the new liq A that obtains in the step 1 as being filtered liquid A; Under the membrane module filter pressure of setting; Adopt small-sized evaluating apparatus to filter new liq A 50-100 milliliter, measure the filtered water value A under the different filtration times simultaneously as one-period; Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value A under the different filtration times of metering through Darcy formula and filter filtration resistance A corresponding under the water yield in difference, calculating membrane module promptly is colloid and the dissolved matter irreversible resistance growth rate B ' that is filtered liquid at total filtration resistance average growth rate value A that filters under the water yield;
Step 4: with the new liq B that obtains in the step 1 as being filtered liquid B; Under the membrane module filter pressure of setting; Adopt small-sized evaluating apparatus to filter new liq B 50-100 milliliter, measure the filtered water value B under the different filtration times simultaneously as one-period; Then,, be filtered liquid forward flushing membrane assembly, accomplish the filtration-cleaning step of one-period with the 10-20 milliliter with pure water 5-10 milliliter back flush membrane module; Repeat a filtration-cleaning step 15-30 cycle, make filter cycle number and the one-period product that is filtered liquid volume reach 1500 milliliters; Obtain membrane module through the filtered water value B under the different filtration times of metering through Darcy formula and filter filtration resistance B corresponding under the water yield in difference, calculating membrane module promptly is the dissolved matter irreversible resistance growth rate B that is filtered liquid at total filtration resistance average growth rate value B that filters under the water yield ".
3. evaluation according to claim 1 is filtered the method for liquid to the polluting property that filters filter membrane, and it is characterized in that: described (2) are according to total irreversible resistance growth rate B, colloid and dissolved matter irreversible resistance growth rate B ' and dissolved matter irreversible resistance growth rate B " judge that the method that membrane module is produced the material type of pollution is:
As B ≈ B ' ≈ B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B ≈ B '＞B " time, it is colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with colloidal substance;
As B ≈ B '＜B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B＞B ' ≈ B " time, it is suspension material and dissolved matter that membrane module is produced the material type that pollutes, and is main with the suspension material;
As B＞B '＞B " time, it is suspension material, colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with suspension material and colloidal substance;
As B＞B ' and B '＜B " time, it is suspension material and dissolved matter that membrane module is produced the material type that pollutes;
As B＜B ' ≈ B " time, it is dissolved matter that membrane module is produced the material type that pollutes;
As B＜B ' and B '＞B " time, it is colloidal substance that membrane module is produced the material type that pollutes;
As B＜B '＜B " time, it is colloidal substance and dissolved matter that membrane module is produced the material type that pollutes, and is main with dissolved matter;
Wherein, " ≈ ", "＞", "＜" is illustrated as: when the scope of B ' is between 0.5B (comprising 0.5B) and the 1.5B (comprising 1.5B) time, be recited as B ≈ B ', the error in judgement scope of all the other " ≈ " is identical; When the scope of B during greater than 1.5B ', be recited as B＞B ', the error in judgement scope of all the other "＞" is identical; When the scope of B is during less than 0.5B ', be recited as B＜B ', the error in judgement scope of all the other "＜" is identical.
4. evaluation according to claim 1 is filtered the method for liquid to the polluting property that filters filter membrane, it is characterized in that: small-sized evaluating apparatus comprise store be filtered the fluid pressure jar, be filtered liquid stirring equipment, the filter of membrane module, product water measuring equipment, air machinery and miillpore filter.
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| CN201010549721XA CN102463037A (en) | 2010-11-10 | 2010-11-10 | Method for evaluating polluting property of filtered liquid |
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| CN201010549721XA CN102463037A (en) | 2010-11-10 | 2010-11-10 | Method for evaluating polluting property of filtered liquid |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537195A (en) * | 2012-07-12 | 2014-01-29 | 上海中立德医药科技有限公司 | Germ entrapping detection apparatus and method by virtue of filter |
| CN105013329A (en) * | 2015-07-07 | 2015-11-04 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for characterizing ultrafiltration membrane pollution |
| CN105727750A (en) * | 2016-04-22 | 2016-07-06 | 北京建筑大学 | Integrated film filtering characteristic evaluating and automatic control experimental device |
| CN106362598A (en) * | 2015-07-22 | 2017-02-01 | 成均馆大学校产学协力团 | Apparatus and method for continuously measuring membrane fouling index |
| CN106512745A (en) * | 2016-10-17 | 2017-03-22 | 哈尔滨工业大学 | Water treatment membrane pool pollution evaluating and controlling method |
| CN109283090A (en) * | 2018-10-23 | 2019-01-29 | 河南省日立信股份有限公司 | Insolubles content on-line measuring device and method in circulation system water |
| CN117193224A (en) * | 2023-11-07 | 2023-12-08 | 江苏航运职业技术学院 | Sewage treatment intelligent monitoring system based on Internet of things |
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2010
- 2010-11-10 CN CN201010549721XA patent/CN102463037A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537195A (en) * | 2012-07-12 | 2014-01-29 | 上海中立德医药科技有限公司 | Germ entrapping detection apparatus and method by virtue of filter |
| CN105013329A (en) * | 2015-07-07 | 2015-11-04 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for characterizing ultrafiltration membrane pollution |
| CN106362598A (en) * | 2015-07-22 | 2017-02-01 | 成均馆大学校产学协力团 | Apparatus and method for continuously measuring membrane fouling index |
| CN105727750A (en) * | 2016-04-22 | 2016-07-06 | 北京建筑大学 | Integrated film filtering characteristic evaluating and automatic control experimental device |
| CN106512745A (en) * | 2016-10-17 | 2017-03-22 | 哈尔滨工业大学 | Water treatment membrane pool pollution evaluating and controlling method |
| CN106512745B (en) * | 2016-10-17 | 2019-10-22 | 哈尔滨工业大学 | A kind of water process membrane cisterna pollution evaluation and the method for control |
| CN109283090A (en) * | 2018-10-23 | 2019-01-29 | 河南省日立信股份有限公司 | Insolubles content on-line measuring device and method in circulation system water |
| CN117193224A (en) * | 2023-11-07 | 2023-12-08 | 江苏航运职业技术学院 | Sewage treatment intelligent monitoring system based on Internet of things |
| CN117193224B (en) * | 2023-11-07 | 2024-02-06 | 江苏航运职业技术学院 | Sewage treatment intelligent monitoring system based on Internet of things |
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Application publication date: 20120523 |