CN104888611B - A kind of hollow fiber film assembly integrity detection device - Google Patents
A kind of hollow fiber film assembly integrity detection device Download PDFInfo
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- CN104888611B CN104888611B CN201510264009.8A CN201510264009A CN104888611B CN 104888611 B CN104888611 B CN 104888611B CN 201510264009 A CN201510264009 A CN 201510264009A CN 104888611 B CN104888611 B CN 104888611B
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Abstract
The invention discloses a kind of hollow fiber film assembly integrity detection device, this device includes reactor, aerator, water pump, is provided with two pairs of platinum filament probes on the water inlet pipe connecting water pump, and two circuit in parallel are connected on the power supply of 5V；Every a pair platinum filament probe is each connected on circuit with a fixed resistance, each resistance fixed capacity also in parallel, by wire and capture card connection even, capture card is gathered the voltage at fixed resistance two ends and is connected with computer by data wire and judges hollow fiber film assembly integrity according to the change of Real time displaying voltage at each fixed resistance two ends.The present invention, according to electrical principles, utilizes data acquisition unit to gather the change of fixed resistance both end voltage, judges module integrity of membrane according to voltage signal Changing Pattern, assembly of the invention, it is possible to achieve continuous on-line detection, not only sensitivity is higher, stable, and economy is preferable.
Description
Technical field
The invention belongs to membrane filtration processing technology field, relate to one and utilize electrical principles detection technique device.
Background technology
In water treatment procedure, hyperfiltration membrane assembly application is increasingly extensive, and this technology is possible not only to remove colloidal solid in water body well,
And can pathogenic microorganism in barrier water body effectively.But, hollow fiber film assembly once occurs breakage in running,
Consequence will be very serious, particularly not only may result in acute and chronic poisoning in Drinking Water processes, it is also possible to causes popular disease
Sick generation.Therefore, the breakage of detection membrane the most timely and effectively, it is ensured that film integrality is for drinking water safety, sewage
Qualified discharges etc. are particularly important.
Being born from water treatment by membrane, just along with the research of film integrality detection method, current film integrality detection method mainly has
Directly or indirectly integrality detection method, owing to the method step of directly detection is loaded down with trivial details, is operationally difficult to realize, and is difficult to
Line detects, and therefore indirect detection is in actual applications by the recommending of widely used and domestic and international authoritative institution of professional.
Indirect detection refers to be reflected the integrity of film by the water quality detecting drainage, mainly includes Turbidity measurement and granule counting method
Deng, turbidity depends mainly on the size of wavelength and granular size, shape and the composition of light, it is impossible to the minor variations of reflection water quality,
And it is vulnerable to the impact of underwater bubble；Grain count detection method is not then suitable for dead-end filtration, because the bubble formed during backwash
Easily affect testing result.It addition, Central China University of Science and Technology scholar Wang Songlin uses magnetic nanoparticle to be label, by measuring
The susceptibility of hyperfiltration membrane assembly permeate, it determines the integrity of each membrane module；Korea S scholar Soo Hoon Choi uses fluorescence to send out
Colored particle, as label, is analyzed by fluorogram, and granular mass is flowed out in estimation, it determines the integrity of membrane module, any of the above
Method the most all has some limitations, and develops quick, accurate, sensitive, continuous, easy film integrality and exists
Line detecting method has become as one of focal issue of accurately application ultrafiltration membrane technique at present.
It is as follows according to electricity equation,
U=I × R=I × (R1+R2)
In above formula, U is circuit voltage, and I is circuital current, and R is circuit all-in resistance, R1Position variable resistance, R2The fixing electricity in position
Resistance, from equation, when circuit variable resistance changes, necessarily causes the change of electric current, fixed resistance both end voltage to change accordingly.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of energy is quick, accurate, sensitive, and can be the most online
The hollow fiber film assembly integrity detection device of detection membrane integrity.
Technical scheme is summarized as follows:
A kind of hollow fiber film assembly integrity detection device, including reactor 20, aeration pump 15 by pipeline successively with gas
Effusion meter 13 and be positioned at the aeration head 12 bottom reactor 20 and connect；The outlet of water pump 3 is connected with one end of outlet pipe 2,
The other end of outlet pipe 2 is positioned at the top of reactor 20；The water inlet of water pump 3 is connected with one end of water inlet pipe 4；Water inlet pipe
Being provided with first pair of platinum filament probe 7 and second pair of platinum filament probe 5 on 4, the first circuit 17 and second circuit 16 are also connected in 5V
Power supply 9 on；First pair of platinum filament probe 7 and the first fixed resistance 8 are connected on the first circuit；First fixed capacity 22 and
One fixed resistance 8 is in parallel；Second pair of platinum filament probe 5 and the second fixed resistance 6 are connected on second circuit；Second fixed capacity
21 is in parallel with the second fixed resistance 6；By wire with capture card 11 even, second is fixing electric at the two ends of the first fixed resistance 8
By wire with capture card 11 even, capture card 11 gathers voltage and the fixed resistance 8 at fixed resistance 6 two ends at the two ends of resistance 6
The voltage at two ends, the signal that capture card collects is connected with computer 10 by data wire and sentences according to the change of Real time displaying voltage
Disconnected hollow fiber film assembly integrity.
The hollow-fibre membrane integrity detection device of the present invention is according to electrical principles, utilizes data acquisition unit to gather fixed resistance
Both end voltage changes, and judges module integrity of membrane, hollow fiber film assembly integrity detection device according to voltage signal Changing Pattern
Can realize continuous on-line detection, not only sensitivity is higher, stable, and economy is preferable.
Accompanying drawing explanation
Fig. 1 is one hollow fiber film assembly integrity detection device (the 1-submerged hollow fiber membrane not including in figure of the present invention
Assembly)
Fig. 2 is hollow fiber film assembly integrity detection device circuit figure of the present invention；
Fig. 3 is two pairs of platinum filament probe schematic diagrams on water inlet pipe 4.
Fig. 4 is that magnitude of voltage is with the Changing Pattern of the time of operation during complete film assembly operating, and the preposition probe in figure is first right
Platinum filament probe, rearmounted probe represents second to platinum filament probe.
Fig. 5 is that in damaged membrane module running, magnitude of voltage is with the Changing Pattern of the time of operation, and the preposition probe in figure represents first
To platinum filament probe, rearmounted probe represents second to platinum filament probe.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
A kind of hollow fiber film assembly integrity detection device, including reactor 20, aeration pump 15 by pipeline successively with gas
Effusion meter 13 and be positioned at the aeration head 12 bottom reactor 20 and connect；The outlet of water pump 3 is connected with one end of outlet pipe 2,
The other end of outlet pipe 2 is positioned at the top of reactor 20；The water inlet of water pump 3 is connected with one end of water inlet pipe 4；Water inlet pipe
Being provided with first pair of platinum filament probe 7 and second pair of platinum filament probe 5 on 4, the first circuit 17 and second circuit 16 are also connected in 5V
Power supply 9 on；First pair of platinum filament probe 7 and the first fixed resistance 8 are connected on the first circuit；First fixed capacity 22 and
One fixed resistance 8 is in parallel；Second pair of platinum filament probe 5 and the second fixed resistance 6 are connected on second circuit；Second fixed capacity
21 is in parallel with the second fixed resistance 6；By wire with capture card 11 even, second is fixing electric at the two ends of the first fixed resistance 8
By wire with capture card 11 even, capture card 11 gathers voltage and the fixed resistance 8 at fixed resistance 6 two ends at the two ends of resistance 6
The voltage at two ends, the signal that capture card collects is connected with computer 10 by data wire.
Fig. 2 is shown in by the circuit diagram of assembly of the invention, and the R1 in Fig. 2 is the first fixed resistance 8；R2 is the second fixed resistance 6；
C1 is the first fixed capacity 22；C2 is the second fixed capacity 21.A, b are two platinum filament probes of first pair of platinum filament probe 7,
C, d are two platinum filament probes of second pair of platinum filament probe 5.
Two pairs of platinum filament probes on water inlet pipe 4 shown in Fig. 3.
Assembly of the invention detection hollow fiber film assembly integrity is exemplified below
Embodiment 1
The other end of the water inlet pipe 4 of hollow fiber film assembly integrity detection device is connected with submerged hollow fibre membrane module in bioreactor 1
Get up；This membrane module is to be poured by 200 PVDF hollow fiber film threads to form, and film silk external diameter is 1.2mm, fills in reactor
Full electrical conductivity is 0.65 × 104The sea water of μ S/cm, water pump 3 is Lange BT-100 type peristaltic pump, and rotating speed is 60, aeration intensity
For 10L/min；First fixed resistance 8 and the second fixed resistance 6 are 100 Ω；First fixed capacity 22 and the second fixing electricity
Hold 21 and be 470uF；Capture card 11 model is USB-1208FS.
After having connected, start power supply, then start peristaltic pump (water pump 3) etc. and run to water inlet pipe 4 and hollow fiber film assembly
After inside there is no bubble, start aeration pump.
In the case of membrane module is complete, the voltage signal collected such as Fig. 4, due to water quality and the interference of circuit noise, signal exists
Fluctuate in the range of 0.02V；Artificially cut off a film silk, collect voltage signal change as it is shown in figure 5, work as bubble to pass through probe
Time, the voltage signal change collecting fixed resistance two ends is shown in Figure 5, and then can be fluctuated model by observation signal
Enclose and judge membrane module breakage.
Hollow fiber film assembly integrity detection device detection time, when former water pass through after submerged hollow fibre membrane module in bioreactor into
First pair of platinum filament probe 7 within water pipe 4 and second pair of platinum filament probe 5, form path, and water outlet is equivalent to variable resistance R1,
Under normal operating conditions, membrane module is without breakage, and water outlet conductivity change is less, and corresponding change in voltage is the least；Aeration produces
In the reactor, when breakage occurs in membrane module, bubble will enter water inlet pipe 4 by film silk breakage to raw countless minute bubbles, when
Bubble passes through probe, little due to bubble Conductivity Ratio water, causes resistance to become big, and corresponding fixed resistance both end voltage diminishes.
Thus by observing voltage signal Changing Pattern, it is judged that whether membrane module there is breakage.Assembly of the invention is suitable for desalinization
The field that the water electric conductivities such as pretreatment are higher, to ensure the sensitivity of device, if water electric conductivity is relatively low, bubble passes through probe
The resistance variations caused is the least, and the change of corresponding fixed resistance both end voltage is the least, affects the susceptiveness of device, so should
Suitably add electrolyte raising and process former electrical conductivity of water.
Claims (1)
1. a hollow fiber film assembly integrity detection device, including reactor (20), aeration pump (15) by pipeline successively with gas
Flowmeter body (13) and be positioned at reactor (20) bottom aeration head (12) connect；The outlet of water pump (3) and water outlet
One end of pipe (2) connects, and the other end of outlet pipe (2) is positioned at the top of reactor (20)；Entering of water pump (3)
The mouth of a river is connected with the one end of water inlet pipe (4)；First pair of platinum filament probe (7) and second pair of platinum are installed on water inlet pipe (4)
Silk probe (5), the first circuit (17) and second circuit (16) are also connected on the power supply (9) of 5V；Described first
Platinum filament probe (7) and the first fixed resistance (8) are connected on the first circuit；First fixed capacity (22) is solid with first
Determine resistance (8) in parallel；Described second pair of platinum filament probe (5) and the second fixed resistance (6) are connected on second circuit；
Second fixed capacity (21) is in parallel with the second fixed resistance (6)；The two ends of the first fixed resistance (8) are passed through wire and are adopted
Even, the two ends of the second fixed resistance (6) join even by wire and capture card (11) truck (11) connection, capture card (11)
Gather voltage and the voltage at the first fixed resistance (8) two ends, the letter that capture card collects at the second fixed resistance (6) two ends
Number it is connected with computer (10) by data wire.
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| CN201510264009.8A CN104888611B (en) | 2015-05-21 | 2015-05-21 | A kind of hollow fiber film assembly integrity detection device |
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| CN201510264009.8A CN104888611B (en) | 2015-05-21 | 2015-05-21 | A kind of hollow fiber film assembly integrity detection device |
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| CN104888611B true CN104888611B (en) | 2016-10-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105771668B (en) * | 2016-05-07 | 2018-03-27 | 天津工业大学 | A kind of hollow fiber film assembly integrity detection device and its detection method |
| CN106731862B (en) * | 2016-12-09 | 2019-04-23 | 天津工业大学 | A kind of hollow fiber film assembly integrality on-line measuring device and detection method |
| CN107117723B (en) * | 2017-04-24 | 2020-10-30 | 葛洲坝水务投资有限公司 | Accurate pipe type microporous aerator installation and detection system and installation and detection method |
| CN108169232A (en) * | 2018-02-14 | 2018-06-15 | 天津工业大学 | A kind of laser dijection sensor for being used to evaluate hollow-fibre membrane backwash effect |
| CN110038441B (en) * | 2019-05-22 | 2023-10-24 | 天津工业大学 | On-line detection system for membrane assembly integrity in hollow fiber membrane filtration process |
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