CN104291497A - Copolymerization pond integrating functions of air flotation and clarification - Google Patents
Copolymerization pond integrating functions of air flotation and clarification Download PDFInfo
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- CN104291497A CN104291497A CN201410607410.2A CN201410607410A CN104291497A CN 104291497 A CN104291497 A CN 104291497A CN 201410607410 A CN201410607410 A CN 201410607410A CN 104291497 A CN104291497 A CN 104291497A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
Abstract
The invention relates to a sewage treatment device, particularly to a copolymerization pond integrating the functions of air flotation and clarification.. The pond comprises a first class flocculation zone, wherein a stirrer, a stirring paddle, a water inlet pipe and a water inflowing and distributing zone are arranged in the first class flocculation zone, and second class flocculation zones, air flotation contact zones and solid-liquid separation zones which are communicated at a bottom are successively distributed above the first class flocculation zone from inside to outside; the second class flocculation zones are communicated with the first class flocculation zone through lifting impellers, and releasers used for draining dissolved air water are respectively arranged at the bottoms of the second class flocculation zones and the air flotation contact zones; and residue scraping equipment is arranged above the second class flocculation zones, the air flotation contact zones and the solid-liquid separation zones, floated residue grooves are formed above the second class flocculation zones, the air flotation contact zones and the solid-liquid separation zones, and the upper parts of the solid-liquid separation zones are connected with water outlet channels, and the lower parts of the solid-liquid separation zones are communicated with the first class flocculation zone. For the pond disclosed by the invention, a traditional mechanical stirring and clarifying pond and the air flotation technology are organically combined, working procedures of mixing, first class flocculation, second class flocculation, air flotation, precipitating, sludge backflow contact flocculation and the like are organically combined together and integrated, and the pond has an outstanding advantage of treating the reservoir water quality of high algae, low turbidity and the like.
Description
Technical field
The present invention relates to a kind of waste disposal plant, particularly a kind of have clarification and air supporting function in copolymerizing and air-float settling pond integrally.
Background technology
Current reservoir water source pollution problem becomes increasingly conspicuous, and wherein algae pollution is particularly serious.Current reservoir water easily presents many algaes in summer, the low turbid characteristic of winter low temperature.Along with water source Eutrophic Extent aggravates year by year, algae reproduction is increasingly serious, and especially at the spring and autumn that temperature variation is larger, alga eruption phenomenon happens occasionally, and causes certain threat to the operation of water factory and water supply security.The density of algae is little, traditional coagulation, precipitation, filtration process are difficult to it effectively to remove, bring the series of problems such as filter tank blocks, backwashing period shortens, processing cost increases, effluent quality variation, some algae also can produce Algae toxins under certain circumstances, threatens to water supply security.
Flocculation and precipitation two process units are incorporated in structures and complete by settling pond, rely on active sludge slime layer to reach clarification object, have good turbidity removal effect.But for high algae, high organism and low temperature and low turbidity water, treatment effect is undesirable.
Tradition air-float technology as one efficiently, fast solid-liquid separation technique be promoted in water treatment field, be comparatively widely used in the purifying treatment of low temperature, low turbid and algae body at present.But the mode that traditional air flotation technology adopts dissolved air water once to reflux; namely former water refluxes dissolved air water after abundant coagulation; microbubble does not participate in particle coagulation process; microbubble adheres to de-steady particle collision, microbubble contact with particle collision delayed, duration of contact is short, the secondary being equivalent to microbubble and flco flocculates; flocculation process is longer; and the interpolymerization of microbubble and flco in Water treatment, can not be given full play to, the adhesive efficiency of microbubble and flco is not high, and microbubble effective rate of utilization is low.
Summary of the invention
Height algae height organism in summer, the low turbid water body characteristic of winter low temperature is presented for current reservoir water, traditional accelerator and air-float technology are organically combined, copolymerizing and air-float settling pond of the present invention, adopts the integrated sewage treating apparatus that operations such as comprising mixing, one-level flocculation, secondary flocculation, copolymerizing and air-float, the adhesion of bubble wadding, precipitation and sludge reflux contact flocculation organically combines.
The present invention is realized by following measures:
Copolymerizing and air-float settling pond of the present invention, comprise one-level flocculation zone, agitator and stirring rake is provided with in one-level flocculation zone, and water inlet pipe and water inlet water distributing area, above one-level flocculation zone, from inside to outside be distributed with the secondary flocculation zone communicated in bottom successively, contact zone of dissolved air flotation, solid-liquid displacement zone, be connected by promoting impeller between secondary flocculation zone with one-level flocculation zone, the bottom of secondary flocculation zone and contact zone of dissolved air flotation is equipped with the reliever of release dissolved air water, secondary flocculation zone, the top of contact zone of dissolved air flotation and solid-liquid displacement zone is equipped with scrapes slag equipment and scum silica frost groove, the top of solid-liquid displacement zone connects outlet canal, bottom is connected with one-level flocculation zone.
Copolymerizing and air-float settling pond of the present invention, in order to realize copolymerizing and air-float better, the volume of contact zone of dissolved air flotation accounts for the 30-50% of secondary flocculation zone.
Copolymerizing and air-float settling pond of the present invention, in order to realize copolymerizing and air-float better, the volume of secondary flocculation zone accounts for the 40-60% of one-level flocculation zone.
Copolymerizing and air-float settling pond of the present invention, in order to realize copolymerizing and air-float better, in secondary flocculation zone, each reliever service area is about 2-3m
2, in contact zone of dissolved air flotation, each reliever service area is about 1-2m
2.
process operation process
After former water dosing, enter trilateral water distributing area, enter one-level flocculation zone afterwards, under the rotation of mechanical stirring oar, flocculate together with the mud of returning, after one-level flocculation, promoted by lifting impeller and enter secondary flocculation zone, the dissolved air water discharged with reliever in secondary flocculation zone carries out contacting and condenses, carry out copolymerizing and air-float, flocs with gas is through contact zone of dissolved air flotation afterwards, carry out flco fully to contact with microbubble, in solid-liquid displacement zone, heavier particle sinks to recirculation at the bottom of pond, scum silica frost is formed after the bubble flocs float that density is less, air-flotation scum enters scum silica frost groove through scraping slag equipment, last in outlet canal water outlet.Wherein pool bottom sludge circulation enters one-level flocculation zone and carries out contact flocculation.
Air floating settling pond operation scheme is flexible.Can manage flexibly air floating settling pond according to algae situation in former water, during former algae class concentration height, open air-float technology, former algae class concentration can stop air supporting time low, run traditional mechanical clarification process, therefore, it is possible to effectively reduce working cost, and, because air flotation cell starts fast, permission intermittent operation, so than being easier to the switching realizing two operation scheme.
process explanation
Present height algae height organism in summer for current reservoir water, the low turbid water quality characteristic of winter low temperature, the problem that traditional accelerator treatment effect is poor more.A kind of new-type air-floatation settling pond of this art inventions, traditional accelerator and air-float technology are organically combined, comprise the operations such as mixing, one-level flocculation, secondary flocculation, air supporting, precipitation and sludge reflux contact flocculation to organically combine, and integrated, tackle high algae, the low Reservoir Water Quality such as turbid has outstanding advantage.
Dissolved air water in traditional air-float technology once adds by present invention process, changes twice into and adds, and first adds part dissolved air water when flocculation reaction, adds rest part dissolved air water again after reaction terminates.Like this can when the micro-wadding grain of step of reaction be just formed, increase probability of collision because microbubble adds and accelerate cohesion speed, air supporting organically combines with flocculation, and enhanced flocculation process and effect, this is one of this process innovation.More significant advantage is, bubble participate in directly cohesion and and wadding grain copolymerization large, bubble is clipped in the middle of wadding grain, both the cohesion of bubble had been given full play to, securely bubble adhesion is being wadded a quilt with cotton on grain again, thus making flocs with gas not only stable in floating-upward process, and also do not sinking easily after becoming scum silica frost, the air supporting that this interpolymerization is good, is called " copolymerizing and air-float ".Copolymerizing and air-float and conventional air-float technology have remarkable difference, conventional air supporting be only perfect for reaction, wadding grain has been tied greatly, bubble mainly sticks to and wads a quilt with cotton around grain.Due to the good stability of the gas enclosure wadding grain that copolymerizing and air-float is formed, little by weather, the advantages such as the required hybrid reaction time is short, have a wide range of applications future.
Notably select suitable GT value and the ratio of twice dissolved air water dosage in copolymerizing and air-float technique, should avoid causing bubble self to collide also flocs with gas that is large and reaction period generation in reaction tank, float up to the situation of the water surface.For creating copolymerization conditions, after former water dosing, taking Quick mechanical to stir, making the equivalent diameter of micro-wadding grain of formation be substantially equal to microbubble diameter 20-50mm.Under such condition, after copolymerization, gas enclosure wadding grain is at more than 100mm.
Tradition flotation waste water treatment mechanism is that former water carries out collision with the microbubble passed into and adheres to after coagulation pretreatment, coagulation mechanism be carry out that electrical counteract takes off surely with its hydrolyzation morphology and aquatic particle, adsorption bridging or adhere to volume sweep and generate thick flco again air supporting be separated removal.Mainly bubble and the collision of wadding grain adhere to flotation waste water treatment mechanism, the net of grain of wadding a quilt with cotton is caught, winding and bridging action.Copolymerizing and air-float is different from traditional flotation waste water treatment technique, key is that dissolved air water classification refluxes, elementary flocculation time is short, and microbubble participates in flco coagulation process directly, and microbubble and the copolymerization of wadding grain are also greatly, the flco bubble that interpolymerization produces is clipped in the middle of wadding grain, as shown in Figure 1, both gave full play to the cohesion of bubble, securely bubble adhesion had been wadded a quilt with cotton on grain again, thus making flocs with gas stable in floating-upward process, the scum silica frost of formation also not easily sinks.In this technique, in one-level flocculation process, main coagulation mechanism is that electrical counteract takes off steady mechanism, and volume caught by its adsorption bridging and net, and to sweep mechanism of action relatively weak.In secondary flocculation process, due to passing into for the first time of dissolved air water, microbubble and particle adhesion dominant mechanism are collision adhesion and the copolymerization adhesive attraction of microbubble and flco, in contact zone of dissolved air flotation air supporting bubble wadding adhesion process, the collision that Water clarifying mechanism is mainly microbubble and bubble flco adheres to and the net steeped between flco-microbubble-particulate matter is caught, winding and bridging action.
The invention has the beneficial effects as follows
(1) copolymerizing and air-float settling pond of the present invention, traditional accelerator and air-float technology are organically combined, comprise the operations such as mixing, one-level flocculation, secondary flocculation, air supporting, precipitation and sludge reflux contact flocculation to organically combine, and integrated, tackle high algae, the low Reservoir Water Quality such as turbid has outstanding advantage.
(2) microbubble adds secondary flocculation zone, participates in flocculation process, and increase wadding grain probability of collision and accelerate cohesion speed, air supporting organically combines with flocculation, enhanced flocculation process and effect.Dissolved air water participates in flocculation process and saves added amount of chemical.
(3) dissolved air water microbubble participate in directly cohesion and and wadding grain copolymerization large, bubble is clipped in the middle of wadding grain, has both given full play to the cohesion of bubble, again securely bubble adhesion on wadding grain, form " copolymerizing and air-float ".
(4) air floating settling pond operation scheme is flexible.During former algae class concentration height, open air-float technology, when former algae class concentration is low, can air supporting be stopped, run traditional mechanical clarification process, therefore, it is possible to effectively reduce working cost, and, because air flotation cell starts fast, permission intermittent operation, so than being easier to the switching realizing two operation scheme.
(5) air supporting and precipitation carry out collaborative solid-liquid separation effect.The algae that density is less, particulate matter are removed by air supporting, and the particulate matter that density is larger, wadding grain are removed by precipitation, and both complete collaborative solid-liquid separation in quiet environment.
Accompanying drawing explanation
Fig. 1 is waste water processes schematic diagram of the present invention
Fig. 2 is air floating settling pond structural representation of the present invention
Fig. 3 is the microscopic examination figure of copolymerization of the present invention bubble flco, wherein: A. copolymerization bulla flco; B. flco microscopic pattern is steeped.
In figure, 1. water inlet pipe; 2. intake water distributing area; 3. one-level flocculation zone; 4. stirring rake; 5. promote impeller; 6. agitator; 7. secondary flocculation zone; 8. contact zone of dissolved air flotation; 9. solid-liquid displacement zone; 10. outlet canal; 11. scum silica frost grooves; 12. scrape slag equipment; 13. rising pipes; 14. blow-down pipes; 15. shore pipes; 16. molten gas recirculation waters; 17. relievers.
Embodiment
one. copolymerizing and air-float settling pond structure
As depicted in figs. 1 and 2, air floating settling pond comprises one-level flocculation zone 3, secondary flocculation zone 7, contact zone of dissolved air flotation 8, solid-liquid displacement zone 9 and the composition such as clear water drained zone 10 and sludge reflux district to air floating settling pond of the present invention.
Concrete structure is: air floating settling pond one-piece construction top is cylindrical, and bottom conically.
One-level flocculation zone 3 is positioned at the bottom of air floating settling pond, tapered, is provided with agitator 6 and stirring rake 4 and water inlet pipe 1 and water inlet water distributing area 2.
Above one-level flocculation zone, be from inside to outside distributed with secondary flocculation zone 7, contact zone of dissolved air flotation 8, solid-liquid displacement zone 9 successively, in concentric structure.The bottom of secondary flocculation zone and contact zone of dissolved air flotation 8 is equipped with reliever 17, and reliever is connected with molten gas recirculation water 16.Be connected by promoting impeller 5 between secondary flocculation zone with one-level flocculation zone, the bottom of secondary flocculation zone 7 and contact zone of dissolved air flotation 8 is equipped with the reliever 17 of release dissolved air water, the top of secondary flocculation zone, contact zone of dissolved air flotation and solid-liquid displacement zone is equipped with scrapes slag equipment 12 and scum silica frost groove 11, and the top of solid-liquid displacement zone connects outlet canal 10, bottom is connected with one-level flocculation zone.
The bottom of secondary flocculation zone and contact zone of dissolved air flotation is with several relievers of annular configuration, and each reliever service area is about 1-3m
2.The volume of secondary flocculation zone accounts for 50% of one-level flocculation zone, and the volume of contact zone of dissolved air flotation 8 accounts for 40% of secondary flocculation zone 7.
In secondary flocculation zone, each reliever service area is about 2-3m
2, in contact zone of dissolved air flotation, each reliever service area is about 1-2m
2.
two. summer treatment process is as follows:
Pending water is reservoir water, and in height algae season in summer, it is 5.0 × 10 containing algae amount
7individual/L, turbidity is 5-20NTU.
Reservoir water adds aluminium iron polychloride (PAFC), and dosage is that 4mg/L(is with Al
3+meter), enter water distributing area, enter one-level flocculation zone afterwards, under the rotation of mechanical stirring oar, flocculate together with the mud of returning.
After one-level flocculation, promoted by lifting impeller and enter secondary flocculation zone, the dissolved air water discharged with reliever in secondary flocculation zone carries out contacting and condenses, and carries out copolymerizing and air-float, form scum silica frost after the bubble flocs float that density is less, air-flotation scum enters scum silica frost groove through scraping slag equipment.The 5%(that the add-on of secondary flocculation zone dissolved air water accounts for sewage total inflow accounts for 1/3 of dissolved air water total amount).
Water behind secondary flocculation zone enters contact zone of dissolved air flotation again, and the dissolved air water that flocs with gas discharges with reliever again carries out contacting and condenses, and flocs with gas fully contacts with microbubble, forms copolymerization bulla flco; In contact zone of dissolved air flotation, 10 %(that the add-on of contact zone of dissolved air flotation dissolved air water accounts for sewage total inflow account for 2/3 of dissolved air water total amount).
Water behind contact zone of dissolved air flotation enters solid-liquid displacement zone, forms scum silica frost after the bubble flocs float that density is less, and air-flotation scum enters scum silica frost groove through scraping slag equipment; Heavier particle sinks at the bottom of pond, enters one-level flocculation zone and carries out contact flocculation.
Wherein, one-level flocculation zone 3 and secondary flocculation zone 7 total residence time are about 20min-30min, wherein the secondary flocculation zone residence time is about 5-10min, the cumulative volume of one-level flocculation zone is about 10min-20min, the flow cavitation result speed of contact zone of dissolved air flotation is 10 ~ 20mm/s, residence time 2-5min, the flow cavitation result speed of solid-liquid displacement zone is 1.5 ~ 2.5mm/s, and surface load gets 5.0-9.0m
3/ m
2.h.
The bottom of secondary flocculation zone is with several relievers of annular configuration, and each reliever service area is about 1-3m
2.
Microbubble diameter 20-50mm in dissolved air water, after copolymerizing and air-float, the diameter of gas enclosure wadding grain is 100-300mm.As shown in Figure 3.
Water after above-mentioned process, containing algae amount is altogether 3.0 × 10
5individual/L, turbidity is 0.70NTU.
three. winter, treatment process was as follows:
Above-mentioned reservoir water, the in the winter time water quality characteristic of low-temperature and low turbidity, it is 7.0 × 10 containing algae amount
5individual/L, turbidity is 2-5NTU.Adopt aforesaid device, in treatment process, stop adding of dissolved air water, carry out flocculating, clarifying.Its water outlet is containing algae amount 4.5 × 10
5individual/L, turbidity is 0.85NTU.
Claims (4)
1. a copolymerizing and air-float settling pond, comprise one-level flocculation zone (3), agitator (6) and stirring rake (4) is provided with in one-level flocculation zone, and water inlet pipe (1) and water inlet water distributing area (2), it is characterized in that: above one-level flocculation zone, from inside to outside be distributed with the secondary flocculation zone (7) communicated in bottom successively, contact zone of dissolved air flotation (8), solid-liquid displacement zone (9), be connected by promoting impeller (5) between secondary flocculation zone with one-level flocculation zone, the bottom of secondary flocculation zone (7) and contact zone of dissolved air flotation (8) is equipped with the reliever (17) of release dissolved air water, secondary flocculation zone (7), the top of contact zone of dissolved air flotation (8) and solid-liquid displacement zone (9) is equipped with scrapes slag equipment (12) and scum silica frost groove (11), the top of solid-liquid displacement zone connects outlet canal (10), bottom is connected with one-level flocculation zone.
2. the copolymerizing and air-float settling pond according to claims 1, is characterized in that: the volume of contact zone of dissolved air flotation (8) accounts for the 30-50% of secondary flocculation zone (7).
3. the copolymerizing and air-float settling pond according to claims 1, is characterized in that: the volume of secondary flocculation zone accounts for the 40-60% of one-level flocculation zone.
4. the copolymerizing and air-float settling pond according to claims 1, is characterized in that: in secondary flocculation zone, and each reliever service area is about 2-3m
2, in contact zone of dissolved air flotation, each reliever service area is about 1-2m
2.
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Cited By (9)
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| CN105502549A (en) * | 2016-01-21 | 2016-04-20 | 山东建筑大学 | Copolymerization flotation-sedimentation tank and water purification method |
| CN106348375A (en) * | 2016-11-08 | 2017-01-25 | 无锡海拓环保装备科技有限公司 | Air floating system specially for high-concentration emulsion waste water |
| CN107459092A (en) * | 2017-09-28 | 2017-12-12 | 上海在田环境科技有限公司 | A kind of contact zone of dissolved air flotation water dispensing apparatus |
| CN107935091A (en) * | 2017-12-30 | 2018-04-20 | 无锡工源机械有限公司 | A kind of integration air-float device |
| CN109293079A (en) * | 2018-11-29 | 2019-02-01 | 恩格拜（武汉）生态科技有限公司 | A kind of low energy consumption aeration cycle clarifying basin |
| CN109665608A (en) * | 2019-02-27 | 2019-04-23 | 连云港大禹水处理工程有限公司 | A kind of air lift stirring-type high dense settling pond and defecation method |
| CN109956587A (en) * | 2019-04-30 | 2019-07-02 | 大连交通大学 | Coagulation air-float is copolymerized Quick Separation System |
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| CN114751560A (en) * | 2022-05-16 | 2022-07-15 | 张妍妍 | Air-floated water treatment device and treatment method thereof |
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| CN105502549B (en) * | 2016-01-21 | 2017-12-15 | 山东建筑大学 | One kind copolymerization floating depositing pool and process for purifying water |
| CN105502549A (en) * | 2016-01-21 | 2016-04-20 | 山东建筑大学 | Copolymerization flotation-sedimentation tank and water purification method |
| CN106348375A (en) * | 2016-11-08 | 2017-01-25 | 无锡海拓环保装备科技有限公司 | Air floating system specially for high-concentration emulsion waste water |
| CN107459092A (en) * | 2017-09-28 | 2017-12-12 | 上海在田环境科技有限公司 | A kind of contact zone of dissolved air flotation water dispensing apparatus |
| CN107935091A (en) * | 2017-12-30 | 2018-04-20 | 无锡工源机械有限公司 | A kind of integration air-float device |
| CN109293079B (en) * | 2018-11-29 | 2023-12-12 | 恩格拜（武汉）生态科技有限公司 | Low-energy-consumption aeration circulation clarification tank |
| CN109293079A (en) * | 2018-11-29 | 2019-02-01 | 恩格拜（武汉）生态科技有限公司 | A kind of low energy consumption aeration cycle clarifying basin |
| CN109665608A (en) * | 2019-02-27 | 2019-04-23 | 连云港大禹水处理工程有限公司 | A kind of air lift stirring-type high dense settling pond and defecation method |
| CN109956587B (en) * | 2019-04-30 | 2023-09-22 | 大连交通大学 | Quick separation system for coagulation air-floatation copolymerization |
| CN109956587A (en) * | 2019-04-30 | 2019-07-02 | 大连交通大学 | Coagulation air-float is copolymerized Quick Separation System |
| CN113967420A (en) * | 2021-06-25 | 2022-01-25 | 北京绿恒科技有限公司 | Multistage hydraulic circulating mixer |
| CN113967420B (en) * | 2021-06-25 | 2023-11-28 | 北京绿恒科技有限公司 | Multistage hydraulic circulation mixer |
| CN114751560A (en) * | 2022-05-16 | 2022-07-15 | 张妍妍 | Air-floated water treatment device and treatment method thereof |
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| CN104291497B (en) | 2015-12-02 |
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Application publication date: 20150121 Assignee: Shandong zhuokang environmental protection equipment Co.,Ltd. Assignor: SHANDONG JIANZHU University Contract record no.: X2022980002390 Denomination of invention: Copolymerization air flotation clarifier Granted publication date: 20151202 License type: Common License Record date: 20220311 |
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