CN109847588A - The method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane - Google Patents
The method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane Download PDFInfo
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- CN109847588A CN109847588A CN201910034059.5A CN201910034059A CN109847588A CN 109847588 A CN109847588 A CN 109847588A CN 201910034059 A CN201910034059 A CN 201910034059A CN 109847588 A CN109847588 A CN 109847588A
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Abstract
The invention discloses a kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane, include the following steps: using external gas-lifting type tubular type membranous system；Sewage in water tank to be filtered is entered in tubular membrane by the second valve；It controls air pump and low speed aeration rate, aeration is adjusted by gas flowmeter；Stop aeration, then adjust high rate aeration rate, is aerated；Low speed and high speed alternate run form recurrent pulses air-flow, and sewage is made to generate slug flow；Data collection system automatically records the voltage signal of conductive electrode, obtain slug flow associated fluid kinetic parameter, monitor operation conditions, after the completion of sewage treatment, flowing water Valve is opened, it produces water under the action of producing water pump to enter in water production tank, incompletely processed sewage enters in water tank to be filtered by the first valve.Method of the invention, is conducive to decelerating membrane pollution.Changing gas velocity and interval time can reduce total tolerance and achieves the purpose of energy saving, the final pollution level for reducing film.
Description
Technical field
The present invention relates to water treatment technology and the technical fields of decelerating membrane pollution, specifically slow down gas using multi-phase flow technology
The method of lift-type tubular type fouling membrane.
Background technique
Tubular membrane have the advantages that runner it is wide, it is not easy to pollute, be readily cleaned, be low to the pretreatment required precision of feed liquid etc., closely
It is widely used over year in liquid separation field.However, the application of tubular membrane is still caused under membrane flux by fouling membrane
It drops and is restricted, how to solve the problems, such as that fouling membrane is increasingly urgent to.
Currently, the method for control fouling membrane mainly faces the problems such as at high cost, cumbersome, membrane damage is big, and pass through film
Surface hydraulic shear effect control fouling membrane can realize continuously filter, have a wide range of application, strong operability, have it is huge dive
Power.
Multiphase flow is a kind of technology that can influence hydraulic shear, refers to and exists simultaneously two or more difference mixing
The flowing of substance.Common multiphase flow has Dual-Phrase Distribution of Gas olid, biphase gas and liquid flow, liquid fixed double phase flow, liquid-liquid diphasic flow and gas-liquid
Liquid, gas-liquid-solid multiphase flow etc..Multi-phase flow technology coverage is very extensive, and almost each process processing technique all relates to more
It mutually flows, predicting the abilities of these process fluid flow behaviors, there are ten for the efficiency and validity that improve these treatment processes
Divide important meaning.
In the system that multiphase mutually flows, by directed circulation caused by gas injection and density contrast, gas-liquid two-phase is utilized
Stream can form unstable cross-flow campaign in film surface, realize cross-flow filtration, under same liquid flow velocity, gas lift cross-flow filtration film
Flux improves 30% compared with single-phase flow, therefore is widely used.There are two typically classify to be for usual airlift reactor
Annular ILAR and outer ring ELAR, ELAR due to its simple construction, low energy consumption and good mixing efficiency chemistry, biology and
Water treatment technology is all widely used.
Gas-liquid two-phase with the variation of gas holdup, will form various forms of fluidised forms in tubular membrane component in tubular membrane.
Wherein there are large effects to film surface for slug flow, and for the slug flow process in tubular membrane, gas slug flow and liquid slug flow exist
Different turbulence intensity and shear stress are caused in film surface.Film surface is alternately exposed in the positive and negative shearing force of slug flow,
Filtrate precipitating can effectively be prevented on the surface of the film and be able to ascend filtration yield.Research has shown that when formation slug flow in membrane tube
When, permeation flux improves 200%.However, continuing to increase aeration rate does not influence significantly but, research shows that gas-liquid two-phase
4 times when filtration flux reaches as high as no aeration filtration are flowed through, energy consumption calculation is shown, under identical energy consumption, aeration filtration flux
2 times when being without aeration.Gas lift process significantly reduces the filtering energy consumption of per unit throughputs, and film surface shearing force at this time is maximum,
Control membrane fouling effect is best, so needing specifically to optimize aeration quantity during carrying out membrane operations, is reaching fouling membrane
While control, energy consumption is saved.Also the application field of gas-lifting type tubular membrane is gradually widened just because of this, and air pulse is as one
The novel technology of kind has caused the concern of more researchers to decelerating membrane pollution significant effect.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of currently to control in fouling membrane method, providing a kind of can further save the energy
Slow down the method for gas-lifting type tubular type fouling membrane with the multi-phase flow technology for reducing fouling membrane.
Technical solution of the present invention is summarized as follows:
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using external gas lift
Formula tubular type membranous system, external gas-lifting type tubular type membranous system include water tank 1 to be filtered, the top of water tank to be filtered by pipeline according to
The secondary top with the first valve 2 and tubular membrane 5 is connect；The lower part of water tank to be filtered by pipeline successively with the second valve 4 and pipe
The lower part of formula film connects；Tubular membrane top by pipeline successively with flowing water Valve 8, vacuum meter 9, produce water pump 10 and water production tank 11
Connection, tubular membrane it is high 2/3rds at be provided with conductive electrode 3, conductive electrode is electrically connected with data collection system, tubular type
Film bottom is successively connect with gas flowmeter 6 and air pump 7 by pipeline, and air pump is connect with feeder；It will be in water tank 1 to be filtered
Sewage by the second valve 4 enter tubular membrane 5 in；It controls air pump 7 and low speed aeration rate 30L/ is adjusted by gas flowmeter 6
H, Air Exposure 60-120s；Stop aeration 30-120s, then adjusts high rate aeration rate 90L/h, Air Exposure 30-120s；It is low
Speed and high speed alternate run, form recurrent pulses air-flow, and sewage is made to generate slug flow；1 meter per second of data collection system is remembered automatically
The voltage signal of conductive electrode is recorded, slug flow associated fluid kinetic parameter is obtained, monitors operation conditions, sewage treatment is completed
Afterwards, flowing water Valve 8 is opened, observes vacuum meter 9, water is produced under the action of producing water pump 10 and is entered in water production tank 11, not completely
The sewage of processing enters in water tank 1 to be filtered by the first valve 2.
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using built-in gas lift
Formula tubular type membranous system, built-in gas-lifting type tubular type membranous system includes water tank 21 to be filtered, in being internally provided with for water tank to be filtered
Immersion type tubular film 22, the top of immersion type tubular film 22 by pipeline through liquid to be filtered water tank side wall successively with flowing water Valve
26, vacuum meter 27, production water pump 28 and water production tank 29 connect, and are provided with conductive electrode at 2/3rds of immersion type tubular film
25, conductive electrode is electrically connected with data collection system, and liquid to be filtered water tank side wall is run through by pipeline in immersion type tubular film bottom
It is successively connect with gas flowmeter 23 and air pump 24, air pump is connect with feeder；Sewage in water tank 21 to be filtered is entered
In immersion type tubular film；It controls air pump 24 and low speed aeration rate 60L/h, Air Exposure 60- is adjusted by gas flowmeter 23
120s；Stop aeration 30-120s, then adjusts high rate aeration rate 90L/h, Air Exposure 30-120s；Low speed replaces fortune with high speed
Row forms recurrent pulses air-flow, and sewage is made to generate slug flow；1 meter per second of data collection system automatically records the electricity of conductive electrode
Signal is pressed, slug flow associated fluid kinetic parameter is obtained, operation conditions is monitored, after the completion of sewage treatment, by flowing water Valve 26
It opens, observes vacuum meter 27, water is produced under the action of producing water pump 28 and is entered in water production tank 29.
Advantages of the present invention: method of the invention is conducive to decelerating membrane pollution.Changing gas velocity and interval time can drop
Low total tolerance achieves the purpose of energy saving, the final pollution level for reducing film.
Detailed description of the invention
Fig. 1 is external gas-lifting type tubular membrane system schematic.
Fig. 2 is built-in gas-lifting type tubular membrane system schematic.
The life of Fig. 3 (a) external gas-lifting type tubular membrane different intermittent times TMP under the alternating gas velocity of 30L/h and 90L/h
Long rate；(b) the growth speed of built-in gas-lifting type tubular membrane different intermittent times TMP under the alternating gas velocity of 60L/h and 90L/h
Rate.
Specific implementation method
Below with reference to specific drawings and examples, the present invention is further illustrated.
Embodiment 1
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using external gas lift
Formula tubular type membranous system (see Fig. 1), external gas-lifting type tubular type membranous system include water tank 1 to be filtered, and the top of water tank to be filtered is logical
Piping is successively connect with the top of the first valve 2 and tubular membrane 5；The lower part of water tank to be filtered by pipeline successively with the second valve
Door 4 is connected with the lower part of tubular membrane；Tubular membrane top by pipeline successively with flowing water Valve 8, vacuum meter 9, produce water pump 10 and produce
Water tank 11 connect, tubular membrane it is high 2/3rds at be provided with conductive electrode 3, conductive electrode is electrically connected with data collection system
It connects, tubular membrane bottom is successively connect with gas flowmeter 6 and air pump 7 by pipeline, and air pump is connect with feeder；It will be to be filtered
Sewage (emulsifiable oil waste water of 1g/L) in water tank 1 is entered in tubular membrane 5 by the second valve 4；It controls air pump 7 and passes through gas stream
Meter 6 adjusts low speed aeration rate 30L/h, Air Exposure 90s；Stop aeration (intermittent time) to be set separately: 10s, 30s, 60s
120s, then adjust high rate aeration rate 90L/h, Air Exposure 70s；Low speed and high speed alternate run form recurrent pulses gas
Stream makes sewage generate slug flow；1 meter per second of data collection system automatically records the voltage signal of conductive electrode, obtains slug flow phase
Fluid dynamics parameter is closed, operation conditions is monitored, after the completion of sewage treatment, flowing water Valve 8 is opened, vacuum meter 9 is observed, is producing
It produces water under the action of water pump 10 to enter in water production tank 11, incompletely processed sewage enters water to be filtered by the first valve 2
In case 1, (see Fig. 3 a).
The TMP rate of rise of alternative aeration with persistently use the TMP rate of rise of high rate aeration identical, i.e., alternative aeration is just
The treatment effect that can reach lasting high rate aeration, the sewage rejection handled in this state 99% or more, it is evident that
Without suspension oil droplet in water after processing.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
Embodiment 2
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using external gas lift
Formula tubular type membranous system (see Fig. 1), external gas-lifting type tubular type membranous system is the same as embodiment 1；Sewage in water tank 1 to be filtered is passed through
Second valve 4 enters in tubular membrane 5；It controls air pump 7 and low speed aeration rate 30L/h, Air Exposure is adjusted by gas flowmeter 6
60s；Stop aeration (intermittent time) 60s, then adjusts high rate aeration rate 90L/h, Air Exposure 30s；Low speed replaces with high speed
Operation forms recurrent pulses air-flow, and sewage is made to generate slug flow；1 meter per second of data collection system automatically records conductive electrode
Voltage signal obtains slug flow associated fluid kinetic parameter, operation conditions is monitored, after the completion of sewage treatment, by flowing water Valve 8
It opens, observes vacuum meter 9, water is produced under the action of producing water pump 10 and is entered in water production tank 11, incompletely processed sewage passes through
First valve 2 enters in water tank 1 to be filtered.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
Embodiment 3
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using external gas lift
Formula tubular type membranous system (see Fig. 1), external gas-lifting type tubular type membranous system is the same as embodiment 1；Sewage in water tank 1 to be filtered is passed through
Second valve 4 enters in tubular membrane 5；It controls air pump 7 and low speed aeration rate 30L/h, Air Exposure is adjusted by gas flowmeter 6
120s；Stop aeration (intermittent time) 120s, then adjusts high rate aeration rate 90L/h, Air Exposure 120s；Low speed and high speed are handed over
For operation, recurrent pulses air-flow is formed, sewage is made to generate slug flow；1 meter per second of data collection system automatically records conductive electrode
Voltage signal, obtain slug flow associated fluid kinetic parameter, monitor operation conditions, after the completion of sewage treatment, by outlet valve
Door 8 is opened, and vacuum meter 9 is observed, and water is produced under the action of producing water pump 10 and is entered in water production tank 11, incompletely processed sewage warp
The first valve 2 is crossed to enter in water tank 1 to be filtered.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
Embodiment 4
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using built-in gas lift
Formula tubular type membranous system (see Fig. 2), built-in gas-lifting type tubular type membranous system includes water tank 21 to be filtered, in the inside of water tank to be filtered
It is provided with immersion type tubular film 22, the top of immersion type tubular film 22 is run through liquid to be filtered water tank side wall successively by pipeline and gone out
Penstock 26, vacuum meter 27 produce water pump 28 and the connection of water production tank 29, are provided with and lead at 2/3rds of immersion type tubular film
Electrode 25, conductive electrode is electrically connected with data collection system, and liquid to be filtered water is run through by pipeline in immersion type tubular film bottom
Case side wall is successively connect with gas flowmeter 23 and air pump 24, and air pump is connect with feeder；By the dirt in water tank 21 to be filtered
Water (emulsifiable oil waste water of 1g/L) enters in immersion type tubular film；It controls air pump 24 and low speed aeration is adjusted by gas flowmeter 23
Rate 60L/h, Air Exposure 90s；Stop aeration (intermittent time) to be set separately: 10s, 30s, 60s 120s, then adjust high speed
Aeration rate 90L/h, Air Exposure 70s；Low speed and high speed alternate run form recurrent pulses air-flow, and sewage is made to generate bullet
Shape stream；1 meter per second of data collection system automatically records the voltage signal of conductive electrode, obtains slug flow associated fluid dynamics ginseng
Number monitors operation conditions, after the completion of sewage treatment, flowing water Valve 26 is opened, and observes vacuum meter 27, in the effect for producing water pump 28
Lower production water enters in water production tank 29.The sewage rejection handled in this state is 99% or more, it is evident that handling it
Afterwards without suspension oil droplet in water.See Fig. 3 b.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
Embodiment 5
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using built-in gas lift
Formula tubular type membranous system (see Fig. 2), built-in gas-lifting type tubular type membranous system is the same as embodiment 4；By the sewage in water tank 21 to be filtered into
Enter in immersion type tubular film；It controls air pump 24 and low speed aeration rate 60L/h, Air Exposure 60s is adjusted by gas flowmeter 23；
Stop aeration (intermittent time) 60s, then adjusts high rate aeration rate 90L/h, Air Exposure 30s；Low speed and high speed alternate run,
Recurrent pulses air-flow is formed, sewage is made to generate slug flow；1 meter per second of data collection system automatically records the voltage of conductive electrode
Signal obtains slug flow associated fluid kinetic parameter, monitors operation conditions, after the completion of sewage treatment, flowing water Valve 26 is beaten
It opens, observes vacuum meter 27, water is produced under the action of producing water pump 28 and is entered in water production tank 29.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
Embodiment 6
A kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using built-in gas lift
Formula tubular type membranous system (see Fig. 2), built-in gas-lifting type tubular type membranous system is the same as embodiment 4；By the sewage in water tank 21 to be filtered into
Enter in immersion type tubular film；It controls air pump 24 and low speed aeration rate 60L/h, Air Exposure is adjusted by gas flowmeter 23
120s；Stop aeration (intermittent time) 120s, then adjusts high rate aeration rate 90L/h, Air Exposure 120s；Low speed and high speed are handed over
For operation, recurrent pulses air-flow is formed, sewage is made to generate slug flow；1 meter per second of data collection system automatically records conductive electrode
Voltage signal, obtain slug flow associated fluid kinetic parameter, monitor operation conditions, after the completion of sewage treatment, by outlet valve
Door 26 is opened, and vacuum meter 27 is observed, and water is produced under the action of producing water pump 28 and is entered in water production tank 29.
It is aerated using low speed, stops aeration, then high rate aeration, alternative aeration, that is, can reach always using high rate aeration
Effect, so that energy-efficient purpose is realized, and alternative aeration forms slug flow and then slows down fouling membrane process.
High rate aeration can remove cake layer.
When interval time is 60s, the growth of the best ventilation rate 90L/h of the growth rate and constant air flow of TMP
Rate is identical, and the rate of rise of TMP reduces then fouling membrane and is reduced.
Claims (2)
1. a kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using external gas-lifting type
Tubular type membranous system, external gas-lifting type tubular type membranous system include water tank to be filtered (1), the top of water tank to be filtered by pipeline according to
The secondary top with the first valve (2) and tubular membrane (5) is connect；The lower part of water tank to be filtered by pipeline successively with the second valve
(4) it is connected with the lower part of tubular membrane；Tubular membrane top by pipeline successively with flowing water Valve (8), vacuum meter (9), produce water pump
(10) with water production tank (11) connect, tubular membrane it is high 2/3rds at be provided with conductive electrode (3), conductive electrode and data
Acquisition system electrical connection, tubular membrane bottom are successively connect with gas flowmeter (6) and air pump (7) by pipeline, air pump and gas supply
Device connection；Sewage in water tank to be filtered (1) is entered in tubular membrane (5) by the second valve (4)；It is logical to control air pump (7)
It crosses gas flowmeter (6) and adjusts low speed aeration rate 30L/h, Air Exposure 60-120s；Stop aeration 30-120s, then adjusts height
Fast aeration rate 90L/h, Air Exposure 30-120s；Low speed and high speed alternate run form recurrent pulses air-flow, make sewage
Generate slug flow；Data collection system automatically records the voltage signal of conductive electrode, obtains slug flow associated fluid dynamics ginseng
Number monitors operation conditions, and after the completion of sewage treatment, flowing water Valve (8) are opened, and water is produced under the action of producing water pump (10) and is entered
In water production tank (11), incompletely processed sewage enters in water tank to be filtered (1) by the first valve (2).
2. a kind of method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane includes the following steps: using built-in gas-lifting type
Tubular type membranous system, built-in gas-lifting type tubular type membranous system includes water tank to be filtered (21), in being internally provided with for water tank to be filtered
Immersion type tubular film (22), the top of immersion type tubular film (22) by pipeline through liquid to be filtered water tank side wall successively with water outlet
Valve (26), vacuum meter (27) produce water pump (28) and water production tank (29) connection, set at 2/3rds of immersion type tubular film
Be equipped with conductive electrode (25), conductive electrode is electrically connected with data collection system, immersion type tubular film bottom by pipeline run through to
Filtered fluid water tank side wall is successively connect with gas flowmeter (23) and air pump (24), and air pump is connect with feeder；It will be to be filtered
Sewage in water tank (1) enters in immersion type tubular film；It controls air pump (24) and adjusts low speed aeration by gas flowmeter (23)
Rate 60L/h, Air Exposure 60-120s；Stop aeration 30-120s, then adjusts high rate aeration rate 90L/h, Air Exposure 30-
120s；Low speed and high speed alternate run form recurrent pulses air-flow, and sewage is made to generate slug flow；Data collection system is automatic
The voltage signal of conductive electrode is recorded, slug flow associated fluid kinetic parameter is obtained, monitors operation conditions, sewage treatment is completed
Afterwards, flowing water Valve (26) are opened, water is produced under the action of producing water pump (28) and is entered in water production tank (29).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114405275A (en) * | 2022-01-26 | 2022-04-29 | 天津科技大学 | Beer filtering equipment and filtering method |
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| CN114405275A (en) * | 2022-01-26 | 2022-04-29 | 天津科技大学 | Beer filtering equipment and filtering method |
| CN114405275B (en) * | 2022-01-26 | 2024-01-23 | 天津科技大学 | Beer filtering equipment and filtering method |
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Application publication date: 20190607 |