CN101781051B - Aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and method for producing drinking water thereby - Google Patents
Aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and method for producing drinking water thereby Download PDFInfo
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- CN101781051B CN101781051B CN2010101248097A CN201010124809A CN101781051B CN 101781051 B CN101781051 B CN 101781051B CN 2010101248097 A CN2010101248097 A CN 2010101248097A CN 201010124809 A CN201010124809 A CN 201010124809A CN 101781051 B CN101781051 B CN 101781051B
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- aeration
- ultrasonic wave
- coagulating
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Abstract
The invention relates to an aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and a method for producing drinking water thereby, belonging to the field of drinking water treatment. The invention solves the problems that split coagulation-ultrafiltration technique occupies large land, forms uneven floccule and causes severe film pollution. A groove is arranged at the bottom of a shell of the separating device, the bottom of the groove is provided with a first aerator, and the upper part of the shell is provided with an ultrasonic metal plate, a second aerator and an ultrafiltration film component. The source water is treated by aeration coagulation, ultrasonic cavitation and ultrafiltration film filtration of the separating device, so that the drinking water can be obtained. The water quality of the water treated by the device reaches the national drinking water standards GB5749-2006. The method reduces the film pollution, prolongs the service life of a film and obtains even floccule. The invention has small land occupying area and simple structure, is applicable to building and field water supply of a small country water supply device, temporary water supply of emergency as well as reconstruction and extension of municipal water plants, and has higher popularization value.
Description
Technical field
The invention belongs to the drinking water treatment field; Be specifically related to a kind of method with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device and production tap water thereof.
Background technology
Along with the continuous expansion of the pollution grows worse and the city size of drinking water source, the reorganization and expansion of rural potable water safety and sanitation and city tap-water factory is subject to people's attention day by day.The rural area lacks certain capital construction facility, and builds and disperse, and is difficult to realize central water supply; The urban land anxiety does not often have solution space when extending in water factory.The ultra-filtration membrane isolation technique can design according to the water scale, and the convenient transportation of packaged unit is suitable for distributed Rural water supply; During extensive water supply, can save floor occupying area in a large number.Along with the maturation of ultra-filtration membrane isolation technique and the reduction of film production cost, its at home water treatment field be with a wide range of applications.Classical coagulation process can be removed multiple pollutent in the water, has research to point out, alumen ustum size and its form in water body of forming behind the coagulation can cause certain pollution to ultra-filtration membrane, and then reduce membrane flux.Traditional mechanical coagulation/ultrafiltration combination process need be provided with two (not having precipitation behind the coagulation) or three (coagulation, post precipitation enter ultra-filtration membrane) reaction tanks, and occupation of land is bigger relatively, increases maintenance service, and operation is more loaded down with trivial details.Traditional coagulation/ultrafiltration combination process is to mix outside the ultrafiltration membrane cisterna, does not guarantee the thorough mixing of coagulating agent and former water, and in the fragmentation that easily causes alumen ustum in the course of conveying of ultrafiltration membrane cisterna, final alumen ustum is uneven, easily causes film to pollute.
Summary of the invention
The invention solves existing separated type coagulation-ultrafiltration technology and take up an area of big, the irregular and with serious pollution problem of film of formation flco (alumen ustum); And provide with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device and the method for producing tap water thereof.
It comprises housing with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device among the present invention, hyperfiltration membrane assembly, backwashing pump, coagulating agent dosing pond, first aerator, second aerator, gas blower, suction pump, pressure transmitter, clear water tanks, water inlet pipe, shore pipe, the back flushing shore pipe, ultrasonic generator, the ultrasonic wave metal plate, taper spoil disposal plate, lift pump and groove constitute, the bottom of described housing is provided with groove, bottom portion of groove is equipped with first aerator, the liquid outlet in coagulating agent dosing pond is communicated with the fluid inlet on the recess sidewall, the water outlet of water inlet pipe is communicated with by lift pump with water-in on the recess sidewall, the intravital top of shell is provided with the ultrasonic wave metal plate, second aerator and hyperfiltration membrane assembly, the ultrasonic wave metal plate is connected with the ultra-sonic generator of hull outside, the water outlet of hyperfiltration membrane assembly is communicated with the water-in of pressure transmitter, pressure transmitter is connected with backwashing pump respectively at suction pump, the water outlet of suction pump is communicated with the water-in of clear water tanks, the import of backwashing pump is communicated with the outlet of clear water tanks, the intravital bottom of shell is equipped with taper spoil disposal plate, have several through holes on the taper spoil disposal plate, the inner chamber of taper spoil disposal plate and groove has formed aeration coagulating sedimentation district, form mud collection area between the outside of taper spoil disposal plate and the housing inner chamber bottom, mud collection area bottom mud mouth is communicated with the mud inlet of shore pipe, and the import of back flushing shore pipe is communicated with the outlet of bottom portion of groove.
Produce the method for tap water is undertaken by following step with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device: one, source water is fed in the aeration coagulating sedimentation district by water inlet pipe, dosing coagulant is the bottom continuous aeration simultaneously, wherein the dosage of coagulating agent is 1～10mg/L, air and water volume ratio are 10～30:1, and hydraulic detention time is about 1～5 minute; Two, the water up-flow after step 1 is handled carries out ultrasonic cavitation to the top of housing, and frequency of ultrasonic is 16～30KHz, and hyperacoustic power is 1～10W/m
2, filtering with hyperfiltration membrane assembly then, the flux of hyperfiltration membrane assembly is at 10～60L/ (m
2H), operating pressure is 0.05～0.2Mpa, and suction pump is pumped in the clear water tanks again, has promptly obtained tap water; Wherein every interval utilized backwashing pump that hyperfiltration membrane assembly is carried out back flushing in 30～150 minutes in the step 2, and each back flushing lasts 30～90 seconds.
With aeration and the isolating water treatment method of low frequency ultrasonic wave reinforced film coagulating, can guarantee the thorough mixing of coagulating agent and former water among the present invention, and the alumen ustum that under the ultrasonic wave homogenizing, forms distribution uniform in membrane cisterna, be easy to membrane sepn.Film silk surface contaminant can be effectively cleaned in the introducing of low-frequency ultrasonic waves, and the formation that effectively slows down gel coat alleviates the concentration polarization phenomenon, and can not cause physical abuse to film; After horizontal air purge device is installed in the membrane cisterna side, under ultrasonic wave, air purge, hydraulic reverse flushing acting in conjunction, can be better to the on-line cleaning effect of film.With aeration and the isolating water treatment method of low frequency ultrasonic wave reinforced film coagulating, can prolong the backwashing period of film, reduce the generation that irreversible membrane is polluted, thereby effectively reduce the frequency of matting, and then the life-span of prolongation ultra-filtration membrane, can play good coagulation effect simultaneously.The present invention is easy to operate, integrated design, maintenance cost is low, can reduce a certain amount of initial cost and initial stage drops into, scale can flexible design, be applicable to the interim water supply and the reorganization and expansion of city water factory of the foundation of the small-sized water supply installation in rural area, open-air water supply, accident, have big promotional value.Through evidence, employing is with aeration and the isolating water treatment method of low frequency ultrasonic wave reinforced film coagulating, can improve the mixed effect in the coagulation process, and the film that produces pollutes and can alleviate by ultrasonic cleaning, side air purge, hydraulic reverse washing action, reduced the matting frequency of ultra-filtration membrane effectively, prolonged the work-ing life of film, working cost is lower, for the application of ultra-filtration membrane in rural potable water and the reorganization and expansion of city tap-water factory provides certain technical guarantee.
Description of drawings
Fig. 1 is apparatus of the present invention synoptic diagram, 23 expression volume pumps among the figure,
The expression valve.
Embodiment
Embodiment one: describe in conjunction with Fig. 1, it comprises housing 1 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device in the present embodiment, hyperfiltration membrane assembly 2, backwashing pump 3, coagulating agent dosing pond 4, first aerator 6, second aerator 7, gas blower 8, suction pump 9, pressure transmitter 10, clear water tanks 11, water inlet pipe 12, shore pipe 13, back flushing shore pipe 14, ultrasonic generator 15, ultrasonic wave metal plate 16, taper spoil disposal plate 17, lift pump 19 and groove 20 constitute, the bottom of described housing 1 is provided with groove 20, groove 20 bottoms are equipped with first aerator 6, the liquid outlet in coagulating agent dosing pond 4 is communicated with fluid inlet on groove 20 sidewalls, the water outlet of water inlet pipe 12 is communicated with by lift pump 19 with water-in on groove 20 sidewalls, top in the housing 1 is provided with ultrasonic wave metal plate 16, second aerator 7 and hyperfiltration membrane assembly 2, ultrasonic wave metal plate 16 is connected with the ultra-sonic generator 15 of housing 1 outside, the water outlet of hyperfiltration membrane assembly 2 is communicated with the water-in of pressure transmitter 10, pressure transmitter 10 is connected with backwashing pump 3 respectively at suction pump 9, the water outlet of suction pump 9 is communicated with the water-in of clear water tanks 11, the import of backwashing pump 3 is communicated with the outlet of clear water tanks 11, bottom in the housing 1 is equipped with taper spoil disposal plate 17, have several through holes 21 on the taper spoil disposal plate 17, the inner chamber of taper spoil disposal plate 17 and groove 20 has formed aeration coagulating sedimentation district 22, form mud collection area 24 between the outside of taper spoil disposal plate 17 and the housing 1 inner chamber bottom, mud collection area 24 bottom mud mouths are communicated with the mud inlet of shore pipe 13, and the import of back flushing shore pipe 14 is communicated with the outlet of groove 20 bottoms.
Present embodiment is provided with pressure transmitter on outlet pipeline, be used for the pollution situation of online observation film.The described device of present embodiment can be connected with robot control system(RCS), and described robot control system(RCS) is made up of transmitter, rly., self-control software etc., can be by the software control dosage, according to the frequency of pressure signal control ultrasonic generator, power and intermittently than size.
The described device of present embodiment is arranged a kind of air aeration device in bottom, submerged ultrafiltration pond, and with the aeration mode coagulation, the water behind the coagulation directly through the external-compression type ultrafiltration membrance filter, is purified water; The side is provided with the air aeration device, can realize being better than effective air purge of bottom aeration; And be provided with the low frequency ultrasound wave apparatus, can realize to the endocorpuscular homogenizing of membrane cisterna and to effective cleaning of film surface attachment particulate matter.The inventive method forms a certain size uniform alumen ustum by the aeration mixing with the ultrasonic wave effect in membrane cisterna inside by the thorough mixing of aeration assurance coagulating agent and former water, can go up the generation that suppresses the irreversible membrane pollution largely.With the separated type coagulation--ultrafiltration relatively can the significant prolongation backwash cycle when effectively removing pollutent.This apparatus structure is simple, can reduce initial cost and initial stage and drop into, and can reduce the frequency of matting, prolongs the work-ing life of ultra-filtration membrane.
Embodiment two: what present embodiment and embodiment one were different is: the material of described housing 1 is synthetic glass or stainless steel.Other is identical with embodiment one.
Embodiment three: what present embodiment was different with embodiment one or two is: described hyperfiltration membrane assembly 2 materials are organic membrane assembly, ceramic film component or stainless steel membrane assembly.Other is identical with embodiment one or two.
Embodiment four: what (referring to Fig. 1) present embodiment and embodiment one to three were different is: also comprise coagulant aids dosing pond 5 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, the outlet in described coagulant aids dosing pond 5 is communicated with import on groove 20 sidewalls.Other is identical with embodiment one to three.
Embodiment five: what (referring to Fig. 1) present embodiment and embodiment one to three were different is: also comprise return line 18 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, the import of described return line 18 is communicated with mud collection area 24 outlet at bottoms, and the outlet of return line 18 is communicated with import on groove 20 sidewalls.Other is identical with embodiment one to three.
Can utilize return line 18 suitably to regulate the backflow ratio according to flco formation situation in the present embodiment, effectively help and coagulate, reach optimum coagulation effect.
Embodiment six: undertaken by following step with the method for aeration and low frequency ultrasonic wave reinforced film coagulating tripping device production tap water in the present embodiment: one, source water is fed in the aeration coagulating sedimentation districts 22 by water inlet pipe 12, dosing coagulant is the bottom continuous aeration simultaneously, wherein the dosage of coagulating agent is 1～10mg/L, air and water volume ratio are 10～30:1, and hydraulic detention time is about 1～5 minute; Two, the water up-flow after step 1 is handled carries out ultrasonic cavitation to the top of housing 1, and frequency of ultrasonic is 16～30KHz, and hyperacoustic power is 1～10W/m
2, filtering with hyperfiltration membrane assembly 2 then, the flux of hyperfiltration membrane assembly 2 is at 10～60L/ (m
2H), operating pressure is 0.05～0.2Mpa, and suction pump 9 is pumped in the clear water tanks 11 again, has promptly obtained tap water; Wherein every interval utilized 3 pairs of hyperfiltration membrane assemblies of backwashing pump 2 to carry out back flushing in 30～150 minutes in the step 2, and each back flushing lasts 30～90 seconds.
Embodiment seven: what present embodiment and embodiment six were different is: the dosage of the described coagulating agent of step 1 is 4～8mg/L.Other step is identical with embodiment four with parameter.
Embodiment eight: what present embodiment was different with embodiment six or seven is: the described coagulating agent of step 1 is Tai-Ace S 150, polymerize aluminum chloride, ferric sulfate or poly-ferric chloride.Other step is identical with embodiment six or seven with parameter.
Embodiment nine: what present embodiment and embodiment six to eight were different is: described air of step 1 and water volume ratio are 15～25:1.Other step is identical with embodiment six to eight with parameter.
Embodiment ten: what present embodiment and embodiment six to nine were different is: the described frequency of ultrasonic of step 2 is 20～25KHz.Other step is identical with embodiment six to nine with parameter.
Embodiment 11: what present embodiment and embodiment six to ten were different is: the flux of hyperfiltration membrane assembly described in the step 22 is at 20～40L/ (m
2H).Other step is identical with embodiment six to ten with parameter.
Embodiment 12: what present embodiment and embodiment six to 11 were different is: close first aerator 6 during back flushing in the step 2, open second aerator 7, intensity is 20～100 m
3/ (m
2H), backwash intensity is 20～100 L/ (m
2H).Other step is identical with embodiment six to 11 with parameter.
Embodiment 13: what present embodiment and embodiment six to 12 were different is: step 1 adds coagulant aids simultaneously at dosing coagulant, and coagulant aids is a potassium permanganate, and the coagulant aids dosage is 0.1～1mg/L.Other step is identical with embodiment six to 12 with parameter.
Embodiment 13: the method that present embodiment is produced tap water with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device is undertaken by following step: one, source water (pH:6.7～7.8; Temperature: 15～20 ℃; Turbidity: 4～10NTU; COD
Mn: 3～5mg/L; UV
254: 0.54～0.75) by water inlet pipe 12 in lift pump feeds groove 20, add polymerize aluminum chloride bottom continuous aeration simultaneously, wherein the dosage of coagulating agent is 2～6mg/L, air and water volume ratio are 10～20:1, hydraulic detention time is about 1～5 minute; Coagulating agent and former water are realized short mix under the aeration effect of bottom, lifting process medium velocity gradual slow, and side can realize the sedimentation of part alumen ustum around, enters mud collection area, and then discharging; Two, the water after step 1 is handled filters with hyperfiltration membrane assembly 2 then through ultrasonic cavitation, has promptly obtained tap water; Used ultra-filtration membrane is the organic hollow tunica fibrosa in the step 2, and operating flux is 20～45 L/ (m
2H), operating pressure is 0.05～0.2MPa, and backwash intensity is 40～100 L/ (m
2H), backwashing period is 30～150 minutes, and back flushing lasts 30～90 seconds; The ultrasonic wave occurrence frequency is 18～25KHz, and it is 2～8 W/m that power takes place
2, aeration 20～100m in side during back flushing
3/ (m
2H).Present embodiment method delivery turbidity＜0.2NTU, COD
Mn＜3mg/L satisfies country's " water quality standard for drinking water " (GB5749-2006).Compare with separated type coagulation/ultrafiltration technology, to COD
Mn, UV
254Clearance all can improve more than 15%, the formed pollution of ultra-filtration membrane is strengthened by ultrasonic wave, side air purge, backwash three recovered can prolong backwashing period 10～50min more than 75%.
Claims (9)
1. with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, it comprises housing (1), hyperfiltration membrane assembly (2), backwashing pump (3), coagulating agent dosing pond (4), first aerator (6), second aerator (7), gas blower (8), suction pump (9), pressure transmitter (10), clear water tanks (11), water inlet pipe (12), shore pipe (13), back flushing shore pipe (14), ultrasonic generator (15), ultrasonic wave metal plate (16), taper spoil disposal plate (17), lift pump (19) and groove (20) constitute, the bottom that it is characterized in that described housing (1) is provided with groove (20), groove (20) bottom is equipped with first aerator (6), the liquid outlet in coagulating agent dosing pond (4) is communicated with fluid inlet on groove (20) sidewall, the water outlet of water inlet pipe (12) is communicated with by lift pump (19) with water-in on groove (20) sidewall, top in the housing (1) is provided with ultrasonic wave metal plate (16), second aerator (7) and hyperfiltration membrane assembly (2), ultrasonic wave metal plate (16) is connected with the ultra-sonic generator (15) of housing (1) outside, the water outlet of hyperfiltration membrane assembly (2) is communicated with the water-in of pressure transmitter (10), pressure transmitter (10) is connected with backwashing pump (3) with suction pump (9) respectively, the water outlet of suction pump (9) is communicated with the water-in of clear water tanks (11), the import of backwashing pump (3) is communicated with the outlet of clear water tanks (11), bottom in the housing (1) is equipped with taper spoil disposal plate (17), have several through holes (21) on the taper spoil disposal plate (17), the inner chamber of taper spoil disposal plate (17) and groove (20) has formed aeration coagulating sedimentation district (22), form mud collection area (24) between the outside of taper spoil disposal plate (17) and housing (1) the inner chamber bottom, mud collection area (24) bottom mud mouth is communicated with the mud inlet of shore pipe (13), and the import of back flushing shore pipe (14) is communicated with the outlet of groove (20) bottom.
2. according to claim 1 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, the material that it is characterized in that housing (1) is synthetic glass or stainless steel.
3. according to claim 2 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, it is characterized in that described hyperfiltration membrane assembly (2) material is organic membrane assembly, ceramic film component or stainless steel membrane assembly.
4. according to claim 1,2 or 3 described with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, it is characterized in that also comprising coagulant aids dosing pond (5) that the outlet in described coagulant aids dosing pond (5) is communicated with import on groove (20) sidewall with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device.
5. according to claim 1,2 or 3 described with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, it is characterized in that also comprising return line (18) with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, the import of described return line (18) is communicated with mud collection area (24) outlet at bottom, and the outlet of return line (18) is communicated with import on groove (20) sidewall.
6. adopt the described method of producing tap water of claim 1 with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device, the method that it is characterized in that aeration and low frequency ultrasonic wave reinforced film coagulating tripping device production tap water is undertaken by following step: one, source water is fed in the aeration coagulating sedimentation district (22) by water inlet pipe (12), dosing coagulant is the bottom continuous aeration simultaneously, wherein the dosage of coagulating agent is 1～10mg/L, air and water volume ratio are 10～30: 1, and hydraulic detention time is 1～5 minute; Two, the water up-flow after step 1 is handled carries out ultrasonic cavitation to the top of housing (1), and frequency of ultrasonic is 16～30KHz, and hyperacoustic power is 1～10W/m
2, use hyperfiltration membrane assembly (2) to filter then, the flux of hyperfiltration membrane assembly (2) is at 10～60L/ (m
2H), operating pressure is 0.05～0.2Mpa, uses suction pump (9) to be pumped in the clear water tanks (11) again, has promptly obtained tap water; Wherein every interval utilized backwashing pump (3) that hyperfiltration membrane assembly (2) is carried out back flushing in 30～150 minutes in the step 2, and each back flushing lasts 30～90 seconds.
7. according to the described method of producing tap water with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device of claim 6, the dosage that it is characterized in that the described coagulating agent of step 1 is 4～8mg/L.
8. according to claim 6 or 7 described methods of producing tap water, it is characterized in that the described coagulating agent of step 1 is Tai-Ace S 150, polymerize aluminum chloride, ferric sulfate or poly-ferric chloride with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device.
9. described according to Claim 8 method of producing tap water with aeration and low frequency ultrasonic wave reinforced film coagulating tripping device is closed first aerator (6) when it is characterized in that in the step 2 back flushing, is opened second aerator (7), and intensity is 20～100m
3/ (m
2H), backwash intensity is 20～100L/ (m
2H).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101248097A CN101781051B (en) | 2010-03-16 | 2010-03-16 | Aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and method for producing drinking water thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101248097A CN101781051B (en) | 2010-03-16 | 2010-03-16 | Aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and method for producing drinking water thereby |
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| CN101781051A CN101781051A (en) | 2010-07-21 |
| CN101781051B true CN101781051B (en) | 2011-09-07 |
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| ITCR20130027A1 (en) * | 2013-10-22 | 2015-04-23 | Rota Guido Srl | DISCONTINUOUS PROCESS OF REDUCTION OF SPILLAGE VOLUMES AND NITROGEN CONTENT IN ZOOTECHNIC LIQUORS |
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| CN1278954C (en) * | 2004-10-19 | 2006-10-11 | 清华大学 | Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor |
| JP5062974B2 (en) * | 2005-06-14 | 2012-10-31 | 旭化成ケミカルズ株式会社 | Ion processing apparatus and method |
| US7553418B2 (en) * | 2007-08-18 | 2009-06-30 | Khudenko Engineering, Inc. | Method for water filtration |
| CN101219846B (en) * | 2008-01-23 | 2010-12-01 | 哈尔滨工业大学 | Ultrafiltration membrane coagulation /adsorption/bioreactor integrating advanced water treatment method and device |
| CN101376553A (en) * | 2008-09-27 | 2009-03-04 | 哈尔滨工业大学 | Method for processing low temperature sewerage using low-intensity ultrasonic strengthened membrane bioreactor |
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