CN106745991A - Electric Desalting Wastewater pre-processes oil removing system and its deoiling method - Google Patents
Electric Desalting Wastewater pre-processes oil removing system and its deoiling method Download PDFInfo
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- CN106745991A CN106745991A CN201611205552.1A CN201611205552A CN106745991A CN 106745991 A CN106745991 A CN 106745991A CN 201611205552 A CN201611205552 A CN 201611205552A CN 106745991 A CN106745991 A CN 106745991A
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- multiphase flow
- flow air
- air supporting
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- flocculation
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- 238000011033 desalting Methods 0.000 title claims abstract description 47
- 239000002351 wastewater Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 title claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000005189 flocculation Methods 0.000 claims abstract description 68
- 230000016615 flocculation Effects 0.000 claims abstract description 68
- 238000005188 flotation Methods 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 34
- 238000005345 coagulation Methods 0.000 claims abstract description 32
- 230000015271 coagulation Effects 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 31
- 238000007667 floating Methods 0.000 claims abstract description 22
- 238000011282 treatment Methods 0.000 claims abstract description 18
- 238000007790 scraping Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 229920002401 polyacrylamide Polymers 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 239000000701 coagulant Substances 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000010734 process oil Substances 0.000 claims 1
- 239000000839 emulsion Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 125000002091 cationic group Chemical group 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000007900 aqueous suspension Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101150103639 PB1 gene Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002892 organic cations Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a kind of Electric Desalting Wastewater pretreatment oil removing system and its deoiling method, it includes：The gas energy flocculation plant and multiphase flow air-floating apparatus being sequentially connected, the multiphase flow air-floating apparatus include multiphase flow air flotation slot is separated into multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone, multiphase flow dissolved air floatation release area, multiphase flow flotation separation zone and multiphase flow air supporting clear water zone by multiphase flow air supporting coagulation area baffle plate, multiphase flow air supporting flocculation zone baffle plate, multiphase flow dissolved air floatation release area's baffle plate and multiphase flow air supporting clear water zone dividing plate in multiphase flow air flotation slot, multiphase flow air supporting Slag Scraping Device, the multiphase flow air flotation slot.Gas of the invention can flocculate and be respectively provided with preferable treatment effect for the Electric Desalting Wastewater of oil emulsion containing various concentrations and COD with the combination unit of multiphase flow air supporting composition, and variation water quality, the impact resistance that can successfully manage Electric Desalting Wastewater are strong.
Description
Technical field
The present invention relates to a kind of Electric Desalting Wastewater pretreatment oil removing system and its deoiling method, belong to environment project neck
Domain.
Background technology
The purpose of crude oil electric desalting is to remove the inorganic salts and water in crude oil, it is to avoid to its, follow-up manufacturing procedure is brought and set
The influences such as standby burn into catalyst poisoning.Electro-desalting method is that a certain amount of demulsifier and water are added in crude oil, in uniform temperature
Under the salt in crude oil is dissolved in the water, then make dissolving dispersed phase water salty by the effect of high voltage electric field and gravitational field
Particle is coalesced and separated from oil-continuous phase, so as to realize the purpose of crude oil desalting, dehydration.The sewage that the process is produced is
Electric Desalting Wastewater.
In recent years, with crude oil in poor quality and commonly used, oil refining enterprise's processing heavy, the poor quality of intensified oil reduction technology
The ratio of crude oil is continuously increased, and causes the complexity of Electric Desalting Wastewater and intractability constantly to increase.On the one hand, electro-desalting is dirty
Contain a large amount of oil emulsions and minute solid particles in water, by small oil droplet is easily wrapped by surfactant and hydrophobic solid particle
Enclose and to form stable state and suspend in water, therefore the oil of this state is difficult to be separated from sewage with conventional articulated gravity partition method and goes
Remove；On the other hand, when processing highly acidic high calcium crude oil, electro-desalting process produces high concentration COD and calcium, molysite sewage, and calcium salt is dense
Spending height will cause sewage disposal system to deposit fouling, cause line clogging and acceleration equipment corrodes, and have bioreactor
Effect volume reducing；Additionally, being rich in colloid, asphalitine in peracid crude oil with poor quality so that floccule containing high concentration in Electric Desalting Wastewater,
And sewage blacks.
Enumerate part oil refining enterprise Electric Desalting Wastewater water quality as shown in table 1：
The Electric Desalting Wastewater water quality of table 1
Existing Electric Desalting Wastewater pretreatment degreasing technique mainly include gravity settling separation, centrifugation, secondary filter or
Membrane filtration, flocculation, air supporting etc., above-mentioned technology generally existing hydraulic detention time is long, oil emulsion removal efficiency is low and operating cost
High deficiency, is described below：
Electric Desalting Wastewater emulsion band oil is serious, and its oils is present in sewage with dispersed and emulsification state, traditional storage tank,
, to oil emulsion almost without centrifugation, therefore deoiling effect is poor for the gravitational separation processes such as oil interceptor；Centrifugation etc. is due at a high speed
Rotation can cause the second emulsifying of Oil in Sewage Water, also not be suitable for the separation of oil emulsion；Accurate filter is separated, coarse separation filter
The technologies such as core, UF membrane, due to poor impact resistance, easily blocking, short life, are not suitable for the oil removing of dirtier Electric Desalting Wastewater；
The technologies such as flocculation, air supporting are not suitable for the big occasion of oil-containing fluctuation then.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of Electric Desalting Wastewater pretreatment oil removing system and
Its deoiling method.
The present invention is achieved by the following technical solutions：
A kind of Electric Desalting Wastewater pre-processes oil removing system, and it includes：The gas energy flocculation plant and multiphase gas being sequentially connected
Floating device, the multiphase flow air-floating apparatus include multiphase flow air flotation slot, multiphase flow air supporting Slag Scraping Device, in the multiphase flow air flotation slot
By multiphase flow air supporting coagulation area baffle plate, multiphase flow air supporting flocculation zone baffle plate, multiphase flow dissolved air floatation release area's baffle plate and multiphase flow
Multiphase flow air flotation slot is separated into multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone, multiphase gas by air supporting clear water zone dividing plate
Floating molten gas release area, multiphase flow flotation separation zone and multiphase flow air supporting clear water zone, the multiphase flow air supporting clear water zone dividing plate it is upper
Portion inner side is provided with multiphase flow air supporting slag chute, and the lower inside of multiphase flow air supporting clear water zone dividing plate is provided with perforation collector pipe, described many
The floating Slag Scraping Device of phase gas is arranged at the suitable for reading of multiphase flow flotation separation zone.
Preferably, multiphase flow air supporting coagulation area's baffle plate setting is described more in the bottom of multiphase flow air flotation slot
The floating flocculation zone baffle plate setting of phase gas in the top of multiphase flow air flotation slot, multiphase flow dissolved air floatation release area's baffle plate setting in
The bottom of multiphase flow air flotation slot.
Preferably, the multiphase flow air supporting coagulation area, be respectively equipped with coagulation area in multiphase flow air supporting flocculation zone and stir
Mix machine and flocculation zone mixer.
Preferably, air dissolved pump is additionally provided with outside the multiphase flow air flotation slot, the air dissolved pump is molten with multiphase flow air supporting
Gas release area is connected.
Preferably, the gas energy flocculation plant includes that the vortex three-phase blender group being sequentially communicated is gentle can flocculate
Separating tank, the vortex three-phase blender group includes that the be sequentially connected in series first vortex three-phase blender, second eddy current three are mixed
Device and the 3rd vortex three-phase blender, the bottom of the gas energy flocculation separation groove is provided with separating tank baffle plate, gas energy flocculation separation groove
The gas that is provided with suitable for reading can flocculate Slag Scraping Device.
Preferably, the bottom of the separating tank baffle plate is provided with perforation water collection sheet.
Preferably, gas is provided with the outside of the gas energy flocculation separation groove can flocculate slag chute.
A kind of deoiling method that oil removing system is pre-processed based on foregoing Electric Desalting Wastewater, it comprises the following steps：
Gas can flocculate and multiphase flow air supporting, wherein, the multiphase flow air supporting includes following operation：
Dosing coagulant and flocculant are distinguished in multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone；
By the water outlet of gas energy flocculation treatment from flowing into multiphase flow air flotation slot, by coagulation and flocculation reaction, make to be remained in water
Suspension and colloid gradually form flco under pharmacy effect；
The water outlet of multiphase flow air supporting flocculation zone enters multiphase flow dissolved air floatation and discharges area, after being mixed with the dissolved air water of backflow
Flow into multiphase flow flotation separation zone；
In multiphase flow flotation separation zone, flco is separated into scum silica frost and clear water, and Slag Scraping Device scrapes in slag chute scum silica frost, clear water
It is drained in multiphase flow air supporting clear water zone by perforation collector pipe.
Preferably, the coagulant is aluminium polychloride, and the flocculant is cationic-type polyacrylamide.
Therefore, compared with prior art, the present invention has following beneficial effect：
1st, Electric Desalting Wastewater pre-treatment is carried out using gas energy flocculation technique, the vortex three-phase hybrid technology that gas can flocculate exclusive
Chemical agent can be maximally utilised, tiny pollution particle and colloid is fully caught, to oil emulsion in Electric Desalting Wastewater,
The pollutants removal rate such as COD and turbidity is high, the influent quality requirement of energy effective guarantee subsequent processing units.
2nd, gas energy flocculation technique by big runner three-phase vortex blender complete medicament mixing, pressure air-dissolving, flco formation,
The parts such as the processes such as decompression explosion release, dissolving, release without traditional air-dissolving air-float technology, reduce treatment electro-desalting dirty
Fouling, the risk for blocking easily are formed during water.
3rd, can be flocculated after pre-treatment through gas, the pollutant concentration such as oil, suspension is greatly reduced in Electric Desalting Wastewater, Jin Ertong
The multiphase gas fine oil removal treatment of floating device is crossed, Oil in Sewage Water dirt concentration can be further removed, subsequent treatment process is met and is entered
Water water quality requirement.
4th, multiphase flow air-floating apparatus instead of reflux pump, pressure air-dissolving tank, the pneumatics of traditional air-dissolving air-float using air dissolved pump
The equipment such as machine, simple structure；Additionally, multiphase flow air-floating apparatus are without dissolved air release, the direct pressure release of high pressure saturated dissolved gas water is released
Put, eliminate the possibility that release blocks fouling.
5th, gas can flocculate with multiphase flow air supporting constitute electro-desalting of the combination unit for oil emulsion containing various concentrations and COD
Sewage is respectively provided with preferable treatment effect, and variation water quality, the impact resistance that can successfully manage Electric Desalting Wastewater are strong.
Brief description of the drawings
The detailed description made to non-limiting example with reference to the following drawings by reading, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the structural representation that Electric Desalting Wastewater of the invention pre-processes oil removing system；
Fig. 2 is the process route chart of Electric Desalting Wastewater oil removing of the invention；
In figure：1st, gas can flocculate intake pump, and 2, three-phase vortex blender, 3, gas energy flocculation separation groove, 4, separating tank baffle plate,
5th, perforate water collection sheet, 6, gas can flocculate Slag Scraping Device, 7, gas can flocculate slag chute, 8, multiphase flow air flotation slot, 9, multiphase flow air supporting coagulation
Area's baffle plate, 10, multiphase flow air supporting flocculation zone baffle plate, 11, multiphase flow dissolved air floatation release area's baffle plate, 12, coagulation area mixer,
13rd, flocculation zone mixer, 14, perforation collector pipe, 15, multiphase flow air supporting Slag Scraping Device, 16, multiphase flow air supporting slag chute, 17, multiphase flow
Air supporting clear water zone dividing plate, 18, air dissolved pump, 19, relief valve；
A- Electric Desalting Wastewaters are intake, B- coagulant, C- compressed airs, D- organic cation flocculating agents, E- anionics
Organic flocculant, F- gas can flocculate scum silica frost, G- treatment water outlets, H- air, I- multiphase flow air-flotation scums.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
A kind of structure of gas energy flocculation plant that the present invention is provided is as shown in figure 1, it includes：The gas being sequentially connected can flocculate
Device and multiphase flow air-floating apparatus, wherein, gas energy flocculation plant includes that the gas that is sequentially communicated can flocculate intake pump 1, vortex three-phase
The gentle energy flocculation separation groove 3 of blender group, vortex three-phase blender group is vortexed 2 groups of three-phase blenders by three be sequentially connected in series
Into the bottom of gas energy flocculation separation groove 3 is provided with separating tank baffle plate 4, and the bottom of separating tank baffle plate 4 is provided with perforation water collection sheet 5, gas energy
The gas that is provided with suitable for reading of flocculation separation groove 3 can flocculate Slag Scraping Device 6；Multiphase flow air-floating apparatus include multiphase flow air flotation slot 8, multiphase gas
Floating Slag Scraping Device 15, gas energy flocculation separation groove 3 and multiphase flow air flotation slot 8 are by pipeline connection, and multiphase flow air flotation slot 8 is interior by multiphase flow
Air supporting coagulation area baffle plate 9, multiphase flow air supporting flocculation zone baffle plate 10, multiphase flow dissolved air floatation release area's baffle plate 11 and multiphase flow air supporting
Multiphase flow air flotation slot is separated into multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone, multiphase flow air supporting by clear water zone dividing plate 17
Molten gas release area, multiphase flow flotation separation zone and multiphase flow air supporting clear water zone, in the top of multiphase flow air supporting clear water zone dividing plate 17
Side is provided with multiphase flow air supporting slag chute 16, and the lower inside of multiphase flow air supporting clear water zone dividing plate 17 is provided with perforation collector pipe 14, multiphase
The floating Slag Scraping Device 15 of gas is arranged at the suitable for reading of multiphase flow flotation separation zone.
The outside of gas energy flocculation separation groove 3 is additionally provided with gas can flocculate slag chute 7.
Multiphase flow air supporting coagulation area baffle plate 9 is arranged at the bottom of multiphase flow air flotation slot 8, the multiphase flow air supporting flocculation
Area's baffle plate 10 is arranged at the top of multiphase flow air flotation slot 8, and multiphase flow dissolved air floatation release area's baffle plate 11 is arranged at multiphase flow air supporting
The bottom of groove 8.
Coagulation area mixer 12 and flocculation zone are respectively equipped with the multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone
Mixer 13, i.e. coagulation area mixer 12 be arranged on multiphase flow air supporting coagulation area baffle plate 9 and multiphase flow air flotation slot 8 madial wall it
Between, flocculation zone mixer 13 is arranged between multiphase flow air supporting coagulation area baffle plate 9 and multiphase flow air supporting flocculation zone baffle plate 10.
Air dissolved pump 18 is additionally provided with outside multiphase flow air flotation slot 8, air dissolved pump 18 is series at multiphase flow dissolved air floatation release Qu Heduo
Between the floating clear water zone of phase gas, relief valve 19 is additionally provided with the outlet conduit of air dissolved pump 18.
A kind of deoiling method that oil removing system is pre-processed based on foregoing Electric Desalting Wastewater, it comprises the following steps：
Gas can flocculate and multiphase flow air supporting, wherein, the multiphase flow air supporting includes following operation：
Dosing coagulant (aluminium polychloride) and flocculation are distinguished in multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone
Agent (cationic PAM)；
By the water outlet of gas energy flocculation treatment from flowing into multiphase flow air flotation slot, by coagulation and flocculation reaction, make to be remained in water
Suspension and colloid gradually form flco under pharmacy effect；
The water outlet of multiphase flow air supporting flocculation zone enters multiphase flow dissolved air floatation and discharges area, after being mixed with the dissolved air water of backflow
Flow into multiphase flow flotation separation zone；
In multiphase flow flotation separation zone, flco is separated into scum silica frost and clear water, and Slag Scraping Device scrapes in slag chute scum silica frost, clear water
It is drained in multiphase flow air supporting clear water zone by perforation collector pipe.
In gas energy flocculated stage：Sewage is pressurized through pump first, is input into three three-phase vortex blenders of series operation, each
Connected by pipeline between three-phase vortex blender；Wherein, the pipeline upslide before first three-phase vortex blender import
Plus coagulant (aluminium polychloride, PAC), compressed air (pressure 0.8MPa) is passed through in first three-phase vortex blender,
Organic cation flocculating agent (cationic-type polyacrylamide, PAM sun) is added in second three-phase vortex blender, the 3rd
Anionic organic flocculant is added in individual three-phase vortex blender (anion-polyacrylamide, PAM is cloudy).Waste water is through three-phase
After blender agent-feeding treatment, the pollutant such as oil, suspension reacts jointly with each medicament and compressed air in water, gradually forms wadding
Body；Then the baffle plate left field bottom in gas energy flocculation separation groove discharges through pressure release, forms ultralight hollow flocs float, and
Flow into the separated region on the right side of baffle plate.In separated region, the flco for floating to top layer forms scum layer, through Slag Scraping Device from separation
Scraped in groove, flow into slag chute storage, and periodically discharge；Clear water after separated flco, is collected by underpunch water collection sheet, from
The delivery port of separating tank lower sidewall flows out to multiphase flow air-floating apparatus and further processes.
Running parameter：Gas energy flocculation treatment Electric Desalting Wastewater order of addition of ingredients and chemical feeding quantity data are as shown in table 2：
The gas of table 2 can flocculate order of addition of ingredients and chemical feeding quantity
The operating pressure of each three-phase vortex blender is as shown in table 3
The three-phase vortex blender operating pressure of table 3
| Operating pressure (MPa) | |
| Three-phase vortex blender (1) | 0.70 |
| Three-phase vortex blender (2) | 0.58 |
| Three-phase vortex blender (3) | 0.54 |
In the multiphase flow air-flotation process stage：The water outlet of gas energy flocculation treatment from flow into multiphase flow air flotation slot, carry out successively coagulation,
The processes such as flocculation, the release of molten gas and flco separation.Dosing coagulant (PB1 gene) in multiphase flow air supporting coagulation area
50mg/L, coagulation stirrer rotating speed be 90 turns/min, added in multiphase flow air supporting flocculation zone flocculant (cationic PAM) 3~
5mg/L, flocculation stirring machine rotating speed is 55 turns/min；By coagulation and flocculation reaction, the suspension and colloid that are remained in water is set to exist
Large scale flco is gradually formed under pharmacy effect.The water outlet of multiphase flow air supporting flocculation zone enters multiphase flow dissolved air floatation and discharges area, with
The dissolved air water of backflow flows into multiphase flow flotation separation zone after being mixed.Air communication pipe is provided with air dissolved pump import, suction is clear
Air is may be inhaled while water, the clear water after treatment is carried out into molten gas, pressurized treatments in the pump housing, and by bleeder valve by molten gas
Water pressure release, in molten gas release area's release；Dissolved air water pressure release discharges to form a large amount of micro-bubbles, and these micro-bubbles are attached to flco
Surrounding, scum silica frost is formed by flco jacking to Disengagement zone top layer, and be linked into top layer scum silica frost in slag chute by Slag Scraping Device, and the scum silica frost in slag chute leads to
Piping flows out.Clear water after separated flco is collected by Disengagement zone bottom perforated collector pipe, flows into the clear water on the right side of baffle plate
Area, and then flowed out by clear water zone top delivery port.
It is 20~30% that air dissolved pump backflow dissolved air water amount accounts for the ratio of device inflow, air dissolved pump operating pressure is 0.5~
0.6MPa。
The Xinjiang refinery Electric Desalting Wastewater treatment of embodiment 1
From the Electric Desalting Wastewater COD that the factory obtainsCrIt is 2125mg/L, oil content 164mg/L, using combination of the present invention
Device carries out oil removal treatment, and wherein gas energy flocculation plant adds PAC concentration 160mg/L, adds cationic PAM concentration 16mg/
L, add anionic PAM concentration 8mg/L；Multiphase flow air-floating apparatus add PAC concentration 50mg/L, add cationic PAM dense
Degree 3mg/L.Combination unit treatment water outlet CODCrFor the clearance of 785mg/L, oil content 30mg/L, COD and oil reaches respectively
63.1% and 81.7%.
The Hubei refinery Electric Desalting Wastewater treatment of embodiment 2
From the Electric Desalting Wastewater COD that the factory obtainsCrIt is 15200mg/L, oil content 289mg/L, using of the present invention group
Attach together to put and carry out oil removal treatment, wherein gas energy flocculation plant adds PAC concentration 500mg/L, adds cationic PAM concentration
30mg/L, add anionic PAM concentration 10mg/L；Multiphase flow air-floating apparatus add PAC concentration 50mg/L, add cationic
PAM concentration 3mg/L.Combination unit treatment water outlet CODCrIt is the clearance difference of 6280mg/L, oil content 14mg/L, COD and oil
Up to 58.7% and 95.2%.
The Heilungkiang refinery Electric Desalting Wastewater treatment of embodiment 3
From the Electric Desalting Wastewater COD that the factory obtainsCrIt is 428mg/L, oil content 9.6mg/L, at combination unit
After reason, water outlet CODCrBe 363mg/L, oil content 0.12mg/L, COD and oil clearance respectively up to 15.2% and 98.8%.
In sum, only presently preferred embodiments of the present invention, not for limiting the scope of present invention implementation, it is all according to
Impartial change carried out by shape, construction, feature and spirit and modification described in scope of the invention as claimed, all should be included in this
In the right of invention.
Claims (9)
1. a kind of Electric Desalting Wastewater pre-processes oil removing system, it is characterised in that including：The gas energy flocculation plant that is sequentially connected and many
Air-floating apparatus are mutually flowed, the multiphase flow air-floating apparatus include multiphase flow air flotation slot, multiphase flow air supporting Slag Scraping Device, the multiphase gas
In floating trough by multiphase flow air supporting coagulation area baffle plate, multiphase flow air supporting flocculation zone baffle plate, multiphase flow dissolved air floatation release area's baffle plate and
Multiphase flow air flotation slot is separated into multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone, many by multiphase flow air supporting clear water zone dividing plate
Mutually stream dissolved air floatation release area, multiphase flow flotation separation zone and multiphase flow air supporting clear water zone, the multiphase flow air supporting clear water zone every
The upper inner of plate is provided with multiphase flow air supporting slag chute, and the lower inside of multiphase flow air supporting clear water zone dividing plate is provided with perforation collector pipe,
The multiphase flow air supporting Slag Scraping Device is arranged at the suitable for reading of multiphase flow flotation separation zone.
2. Electric Desalting Wastewater as claimed in claim 1 pre-processes oil removing system, it is characterised in that the multiphase flow air supporting coagulation
, in the bottom of multiphase flow air flotation slot, the multiphase flow air supporting flocculation zone baffle plate setting is in the top of multiphase flow air flotation slot for area's baffle plate setting
Portion, the multiphase flow dissolved air floatation discharges area's baffle plate setting in the bottom of multiphase flow air flotation slot.
3. Electric Desalting Wastewater as claimed in claim 1 pre-processes oil removing system, it is characterised in that the multiphase flow air supporting coagulation
Coagulation area mixer and flocculation zone mixer are respectively equipped with area, multiphase flow air supporting flocculation zone.
4. Electric Desalting Wastewater as claimed in claim 1 pre-processes oil removing system, it is characterised in that outside the multiphase flow air flotation slot
Air dissolved pump is additionally provided with, the air dissolved pump is connected with multiphase flow dissolved air floatation release area.
5. Electric Desalting Wastewater as claimed in claim 1 pre-processes oil removing system, it is characterised in that the gas energy flocculation plant bag
The gentle energy flocculation separation groove of the vortex three-phase blender group being sequentially communicated is included, the vortex three-phase blender group includes being sequentially connected in series
The first vortex three-phase blender, second eddy current three-phase blender and the 3rd vortex three-phase blender, the gas energy flocculation separation
The bottom of groove is provided with separating tank baffle plate, and the gas that is provided with suitable for reading of gas energy flocculation separation groove can flocculate Slag Scraping Device.
6. Electric Desalting Wastewater as claimed in claim 5 pre-processes oil removing system, it is characterised in that under the separating tank baffle plate
Portion is provided with perforation water collection sheet.
7. Electric Desalting Wastewater as claimed in claim 5 pre-processes oil removing system, it is characterised in that the gas energy flocculation separation groove
Outside be provided with gas and can flocculate slag chute.
8. it is a kind of based on described in claim 1 Electric Desalting Wastewater pre-process oil removing system deoiling method, it is characterised in that including
Following steps：
Gas can flocculate and multiphase flow air supporting, wherein, the multiphase flow air supporting includes following operation：
Dosing coagulant and flocculant are distinguished in multiphase flow air supporting coagulation area, multiphase flow air supporting flocculation zone；
By the water outlet of gas energy flocculation treatment from flowing into multiphase flow air flotation slot, by coagulation and flocculation reaction, make to remain in water is outstanding
Float and colloid gradually form flco under pharmacy effect；
The water outlet of multiphase flow air supporting flocculation zone enters multiphase flow dissolved air floatation and discharges area, is flowed into after being mixed with the dissolved air water of backflow
In multiphase flow flotation separation zone；
In multiphase flow flotation separation zone, flco is separated into scum silica frost and clear water, and Slag Scraping Device scrapes in slag chute scum silica frost, and clear water is by wearing
Hole collector pipe is drained in multiphase flow air supporting clear water zone.
9. deoiling method as claimed in claim 8, it is characterised in that the coagulant is aluminium polychloride, the flocculant
It is cationic-type polyacrylamide.
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| CN201611205552.1A CN106745991A (en) | 2016-12-23 | 2016-12-23 | Electric Desalting Wastewater pre-processes oil removing system and its deoiling method |
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| CN108328877A (en) * | 2018-04-03 | 2018-07-27 | 大连交通大学 | Coagulation air-float biological activated carbon group technology treated sewage system and method |
| CN108455695A (en) * | 2018-05-15 | 2018-08-28 | 易能环境技术有限公司 | A kind of impact-resistant efficient air-floating system and its sewage water treatment method |
| CN108996770A (en) * | 2018-09-15 | 2018-12-14 | 北京翰祺环境技术有限公司 | A kind of rapidly and efficiently oil removing Airfloat filtering pond |
| CN109851091A (en) * | 2019-01-18 | 2019-06-07 | 中国石油工程建设有限公司 | The efficient microbubble oil removal by air bubbling oil removal system of oil gas field brine waste and technique |
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| CN117699926A (en) * | 2024-02-02 | 2024-03-15 | 中国石油大学(华东) | Electromagnetic coupling copolymerization multistage air floatation oil removal device and method |
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