CN109694116A - A kind of compounded mix unit, dynamic oil-water separating device and separation method using it - Google Patents
A kind of compounded mix unit, dynamic oil-water separating device and separation method using it Download PDFInfo
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- CN109694116A CN109694116A CN201910049400.4A CN201910049400A CN109694116A CN 109694116 A CN109694116 A CN 109694116A CN 201910049400 A CN201910049400 A CN 201910049400A CN 109694116 A CN109694116 A CN 109694116A
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- oleophobic
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
Abstract
The present invention provides a kind of compounded mix unit, using its dynamic oil-water separating device and separation method, the compounded mix unit includes oleophilic drainage filler and hydrophilic and oleophobic filler.Described device includes shell and the compounded mix unit for being set to enclosure interior and the aeration unit for generating microbubble；The compounded mix unit and aeration unit are from top to bottom set gradually；The compounded mix unit is from top to bottom disposed with oleophilic drainage packing layer and hydrophilic and oleophobic packing layer.The method carries out in said device.A variety of isolation technics such as oily-water seperating equipment provided by the invention will adsorb, coalescence demulsification, air bearing and filtering have carried out highly integrated, reduce the occupied area of equipment, the clogging of coalescent pack layer is alleviated, with easy to operate, high reliablity, simple and convenient operation and maintenance and separation process technical advantage without secondary pollution.
Description
Technical field
The invention belongs to liquid separation technology field, it is related to a kind of compounded mix unit, the oily-water seperating equipment using it
And separation method more particularly to a kind of compounded mix unit, dynamic oil-water separating device and separation method using it.
Background technique
A large amount of oily waste water is easily generated in oil exploitation, processing and chemical production process, sump oil therein is general
Exist in the form of free state, dispersed, emulsification state and solubilised state, problems faced is mainly oil emulsion and dissolved oil at this stage
The problem of, oil emulsion and dissolved oil account for about the 5%~20% of total oil mass, and partial size is generally less than 100 μm, and mainly with water packet
The form of oil and Water-In-Oil exists, and negatively charged, and relatively stable in water, the oil droplet of this form is that isolated emphasis is also
The difficult point of research.Oil-water separation method common at present mainly has big tank sedimentation, demulsification air bearing and filtering etc..
Big tank sedimentation mainly makes grease by the settlement action of water droplet in the washing effect and top crude oil of lower water layer
Separation, when crude oil rises to settling tank top liquid level, water content is greatly reduced, and the cleaned crude oil after sedimentation separation collects certainly
Oil groove and oil spill pipe discharge.Big tank sedimentation mainly removes the very high oil slick of oil removal and dispersed oil, can not have for oil emulsion etc.
Effect removal.
Demulsification air bearing passes through demulsification and materializing procedure first, and pollutant concentration is greatly lowered, and mitigates subsequent processing and sets
Standby load, main removal water inlet middle and high concentration suspended matter and a large amount of oils, can reduce Organic substance in water at the same time
Content；After materializing strategy, then handle by active carbon filtration the content of further overall reduction pollutant；Finally pass through again
Filtering guarantees water quality reaching standard discharge；Wherein demulsification process needs to introduce chemical agent, causes secondary pollution to oil and water outlet, separately
It outside due to structure and design problem, causes to take up a large area, situations such as bubble is uneven occurs, and leads to oil removing oil removal efficiency
It is low.
And filter the filter plant needed using profession, for high oil and suspended matter sewage exist dirty stifled, cleaning frequently and
The problems such as replacement period is short.
It is wanted as can be seen that current sewage deoiling method and device are all unable to satisfy existing environmental requirement with energy-saving and emission-reduction
It asks, therefore is badly in need of the oily-water seperating equipment and separation method of a kind of economical and efficient.
CN207192857U discloses a kind of air-dissolving air-float tank, including tank body, upper cover, lower head, filler mounting rack, cone
Shape cylinder, the filler mounting rack are equipped with coalescent pack, cone cylinder, and the downside of the cone cylinder is equipped with sewage pipe, the cone cylinder it is upper
Side is equipped with outer cylinder, and inner cylinder is equipped in the outer cylinder, is tangentially welded with eddy flow water inlet pipe on the side wall of the inner cylinder, the eddy flow into
Insertion tube is plugged in water pipe, the insertion tube is connected with static mixer, water inlet；The tank body is equipped with floating on upper cover
The lower head of slag outlet, the tank body is equipped with sewage pipe；A closed water purification is formed between the conically shaped and lower head
Area, the lower surface of the conically shaped are evenly arranged with the water distribution square tube of several connection tank bodies and clean water area；The clean water area exists
The side wall of tank body is equipped with water outlet；Structure is complicated for the device, and filler is fixed bed form, and is related to cyclone separator,
Impact resistance is poor, and energy consumption is high.
CN105084449A discloses a kind of vertical-type air-flotation coalescent oil-water separator, including in separator shell, separator
It is poly- to be from top to bottom successively arranged top inside the separator liner for gallbladder, filter layer, top coalescing layer, lower coalescing layer, aeration head
Knot layer, lower coalescing layer and aeration head, the filter layer are located between the separator liner and separator shell on separator top,
The clearance fit of size and separator liner and separator shell is additionally provided with gas access in the bottom of the aeration head.The dress
The coalescent pack using two kinds of fixed-bed types is set, and has filter layer, it is stifled to easily lead to equipment dirt；With closed structure, lower layer
Coalescent pack is not easy to replace.
CN103351038A discloses a kind of Gas-floatation rotational-flow coalescence composite type sewage degreasing unit, mainly by multi-functional separation
Tank, two-stage gas and water mixer and adjusting control cabinet composition；There is inlet in multi-functional knockout drum middle and upper part, and middle part goes out equipped with oil
Mouthful, lower part is equipped with Water Soluble Gas and circulator, and bottom is equipped with sewage draining exit, and exhaust outlet and communicating pipe are arranged at top.Multi-functional knockout drum
Inside is equipped with inward turning flow cartridge, and bottom is connected with flowline.Gas mist eliminator is equipped with above inward turning flow cartridge；Under multi-functional knockout drum
The water collector in portion is connected with multi-functional knockout drum water out and the recirculated water mouth of a river respectively；Exhaust outlet at the top of knockout drum passes through pipeline
It is connected with the import of second level gas and water mixer.Knockout drum water out adjusts control cabinet water inlet with side and connect, and adjusts control
Connection at the top of box top and knockout drum.The relative energy consumption of the device is relatively high, and construction is more complicated, and separating rate is slow.
In current oily waste water treatment, a kind of sewage oil removal efficiency contradiction compared with oil removing cost, it would be highly desirable to efficiently warp
The oily-water seperating equipment and separation method of Ji.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of compounded mix unit, using its
A variety of isolation technics such as absorption, coalescence demulsification, air bearing and filtering are carried out height collection by dynamic oil-water separating device and separation method
At reducing the occupied area of equipment, alleviate the clogging of coalescent pack layer, the device is easy to operate, high reliablity, behaviour
Make easy maintenance and separation process is without secondary pollution, is likewise supplied with ideal separating effect for oil emulsion and dissolved oil.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of compounded mix unit of dynamic water-oil separating, the compounded mix unit
Including oleophilic drainage filler and hydrophilic and oleophobic filler.
As currently preferred technical solution, the density of the oleophilic drainage packing layer is less than the close of hydrophilic and oleophobic filler
Degree.
Preferably, the density of the oleophilic drainage filler is 1.2g/cm3~2.5g/cm3, such as can be 1.2g/cm3、
1.3g/cm3、1.4g/cm3、1.5g/cm3、1.6g/cm3、1.7g/cm3、1.8g/cm3、1.9g/cm3、2.0g/cm3、2.1g/
cm3、2.2g/cm3、2.3g/cm3、2.4g/cm3Or 2.5g/cm3。
Preferably, the density of the hydrophilic and oleophobic filler is 1.8g/cm3~5.6g/cm3, such as can be 2.0g/cm3、
2.2g/cm3、2.4g/cm3、2.6g/cm3、2.8g/cm3、3.0g/cm3、3.2g/cm3、3.4g/cm3、3.6g/cm3、3.8g/
cm3、4.0g/cm3、4.2g/cm3、4.4g/cm3、4.6g/cm3、4.8g/cm3、5.0g/cm3、5.2g/cm3、5.4g/cm3Or
5.6g/cm3。
Preferably, the oleophilic drainage filler and oil 60 degree of contact angle <, such as can be 5 °, 10 °, 15 °, 20 °,
25 °, 30 °, 35 °, 40 °, 45 °, 50 ° or 55 °.
Preferably, 50 degree of contact angle < of the hydrophilic and oleophobic filler and water, for example, can be 5 °, 10 °, 15 °, 20 °,
25 °, 30 °, 35 °, 40 ° or 45 °.
Preferably, the oleophilic drainage filler is selected from modified poly ethylene or modified polypropene.
Preferably, the hydrophilic and oleophobic filler is selected from modified ceramic grain, stainless steel wave card or iron carbon granules.
Oleophilic drainage filler provided by the invention is modified filler, with bigger water contact angle and smaller oil contact
Angle enables oil droplet to soak filler surface well, realizes demulsification coalescence, operates convenient for subsequent dissolved air flotation.
Hydrophilic and oleophobic filler provided by the invention is that have the coalescent packs such as the modified ceramic grain of Mm filter precision, with water
With lesser contact angle, filter effect well can achieve, while there is biggish contact angle with oil, on the one hand, can be with
Small molecule oil slick is improved in the collision frequency of hydrophilic and oleophobic filler surface, on the other hand, slows down or even avoids greasy dirt blocking and fill out
The case where expecting channel occurs.
Second aspect, the present invention provides a kind of dynamic oily-water seperating equipment, described device includes shell and setting
In the compounded mix unit of enclosure interior and aeration unit for generating microbubble；The compounded mix unit and aeration unit
From top to bottom set gradually；The compounded mix unit is from top to bottom disposed with oleophilic drainage packing layer and hydrophilic and oleophobic fills out
The bed of material.
Preferably, the oleophilic drainage packing layer uses the oleophilic drainage filler as described in first aspect.
Preferably, the hydrophilic and oleophobic packing layer uses the hydrophilic and oleophobic filler as described in first aspect；
The third aspect, the present invention provides a kind of dynamic oily-water seperating equipment, described device includes shell, the shell
Inside is from top to bottom disposed with floating type coalescent pack layer, fixed-bed type coalescent pack layer and the exposure for generating microbubble
Gas unit.
The present invention for emulsified state oily wastewater devise it is a kind of load variety classes filler have compounded mix
The oily-water seperating equipment of layer structure, the oily-water seperating equipment have set gradually floating type coalescence in oily wastewater flow direction and have filled out
The bed of material and fixed-bed type coalescent pack layer, bottom of device is additionally provided with the air bearing release of continuous aeration, in the whole of water-oil separating
In a process, air bearing release constantly discharges microbubble.
Oily wastewater from top to bottom passes sequentially through the compounded mix unit for being filled with variety classes filler, contains in the process
Oil mutually demulsification coalescence in oily water, and contacted with the microbubble being from top to bottom gradually increasing, and adhere to and be flocked on microbubble table
Face is gradually floated by microbubble drive, realizes water-oil separating, and oil after separation, which mutually collects in, forms scum layer at the top of liquid level,
Discharge or recycling, the water phase after oil removing are discharged by separator bottom at the top of from device, and so far, oily wastewater is effectively divided
From.
In entire oil water separation process, the microbubble that air bearing release generates from top to bottom flows, and completes air bearing behaviour
The case where while work, backwash effect is played to compounded mix layer, slows down or even avoids greasy dirt blocking filler passage hair
It is raw, substantially prolong the service life of filler and the cycle of operation of equipment.
As currently preferred technical solution, the floating type coalescent pack layer includes oleophilic drainage filler.This hair
Bright, porous and large specific surface area oleophilic drainage filler irregular using shape loads floating type coalescent pack layer, when operation, fills out
Material can be suspended on liquid level, and floating type coalescent pack layer is also convenient for that filler is cleaned and recycled after end of run.
Preferably, the density of the oleophilic drainage filler is 1.2g/cm3~2.5g/cm3, such as can be 1.2g/
cm3、1.3g/cm3、1.4g/cm3、1.5g/cm3、1.6g/cm3、1.7g/cm3、1.8g/cm3、1.9g/cm3、2.0g/cm3、
2.1g/cm3、2.2g/cm3、2.3g/cm3、2.4g/cm3Or 2.5g/cm3。
Preferably, 60 degree of oily contact angle < of the oleophilic drainage filler, for example, can be 5 °, 10 °, 15 °, 20 °,
25 °, 30 °, 35 °, 40 °, 45 °, 50 ° or 55 °.
Preferably, the oleophilic drainage filler is modified poly ethylene or modified polypropene.
The oleophilic drainage filler that the present invention uses is modified filler, with bigger water contact angle and smaller oil contact
Angle enables oil droplet to soak filler surface well, realizes demulsification coalescence, operates convenient for subsequent dissolved air flotation.
Preferably, the fixed-bed type coalescent pack layer includes hydrophilic and oleophobic filler.The present invention is using shape rule, ratio
The hydrophilic and oleophobic filler that surface area is big and intensity is high loads fixed-bed type coalescent pack layer, and fixed-bed type coalescent pack layer bottom is set
There is the limit screen for being used to support filler.
Preferably, the density of the hydrophilic and oleophobic filler is 1.8g/cm3~5.6g/cm3, such as can be 2.0g/
cm3、2.2g/cm3、2.4g/cm3、2.6g/cm3、2.8g/cm3、3.0g/cm3、3.2g/cm3、3.4g/cm3、3.6g/cm3、
3.8g/cm3、4.0g/cm3、4.2g/cm3、4.4g/cm3、4.6g/cm3、4.8g/cm3、5.0g/cm3、5.2g/cm3、5.4g/cm3
Or 5.6g/cm3。
Preferably, 50 degree of the water contact angle < of the hydrophilic and oleophobic filler, for example, can be 5 °, 10 °, 15 °, 20 °,
25 °, 30 °, 35 °, 40 ° or 45 °.
Preferably, the hydrophilic and oleophobic filler is modified ceramic grain, stainless steel wave card or iron carbon granules.
The hydrophilic and oleophobic filler that the present invention uses is that have the coalescent packs such as the modified ceramic grain of Mm filter precision, with water
With lesser contact angle, filter effect well can achieve, while there is biggish contact angle with oil, on the one hand, can be with
Small molecule oil slick is improved in the collision frequency of hydrophilic and oleophobic filler surface, on the other hand, slows down or even avoids greasy dirt blocking and fill out
The case where expecting channel occurs.
Oily wastewater is during the decline successively by floating type oleophilic drainage filler and fixed-bed type is hydrophilic and oleophobic fills out
Material, two kinds of packing layers of different nature not only play the purpose of coalescence, also can achieve the effect of filtering, improve water outlet water
Matter.
As currently preferred technical solution, the aeration unit is selected from air bearing release.
Preferably, the air bearing release includes air bearing release head.
Preferably, the air bearing release head is stainless steel perforated tube release head.Stainless steel perforated tube release head tool
There is the features such as molten gas release is uniform, bubble is small, the service life is long.
Preferably, it is additionally provided with water distributor above the floating type coalescent pack layer, the water distributor is used for entering institute
The oily wastewater for stating oily-water seperating equipment is uniformly distributed.The present invention is not particularly limited the specific structure of water distributor, can
With realize to oily wastewater be uniformly distributed purpose disclose in the prior art or new technology in undocumented water distributor it is equal
It can be used in the present invention.
Preferably, the top of the shell is equipped with oil discharge outlet.
Preferably, the upper part of the housing is equipped with oily wastewater import, and the oily wastewater import is located on the water distributor
Side.
Preferably, the lower part of the housing is equipped with air inlet, the pressure dissolving gas water of the air inlet and the air bearing release
Inlet communication.
Preferably, the housing bottom is equipped with water outlet.
Preferably, the housing bottom is additionally provided with backwash mouth.
Preferably, it the water outlet and the backwash mouth integrated setting or is independently arranged.
Fourth aspect, the present invention provides a kind of methods of dynamic water-oil separating, and the method is in second aspect or third
It is carried out in device described in aspect.
As currently preferred technical solution, which comprises
Oily wastewater passes through oleophilic drainage packing layer and hydrophilic and oleophobic packing layer from top to bottom, and generated with aeration unit
Microbubble contacts air bearing, realizes water-oil separating；Alternatively, oily wastewater passes through floating type coalescent pack layer and fixed bed from top to bottom
Formula coalescent pack layer, and the microbubble generated with aeration unit contacts air bearing, realizes water-oil separating.
Preferably, the method specifically includes:
(1) it is passed through pressure dissolving gas water to air inlet, opens air bearing release, the microbubble of generation sequentially passes through from the bottom to top
Hydrophilic and oleophobic packing layer and oleophilic drainage packing layer, or fixed-bed type coalescent pack layer and floating type is sequentially passed through from the bottom to top
Coalescent pack layer；
(2) oily wastewater is passed through oily-water seperating equipment by top, contacts, contains with the microbubble risen from bottom through water distributor
Small molecule oil slick in oily water floats under the action of microbubble, realizes level-one dissolved air flotation；
(3) oily wastewater after level-one dissolved air flotation carries out brokenly in oleophilic drainage packing layer or floating type coalescent pack layer
Cream is agglomerated into larger oil droplet, and larger oil droplet floats under the action of microbubble, realizes secondary air-floatation separation；
(4) oil residues in the oily wastewater after secondary air-floatation separation are mutually coalesced in hydrophilic and oleophobic packing layer or fixed-bed type
Collision coalescence in packing layer floats under the action of microbubble, realizes three-level dissolved air flotation, and the oil after floating is mutually arranged by top
Out, isolated water phase is discharged by bottom.
Oil-water separation method provided by the invention first opens air bearing release, generates microbubble using common aeration mode,
Microbubble is gradually increasing by the cutting again when compounded mix unit by filler, and bubble diameter can reach micron level, no
The degree of scatter for improving only bubble strengthens air flotation effect, while also avoiding air-dissolving air-float reflux and with pressure etc. easily going out
Existing unfavorable phenomenon.Oily wastewater is contacted, oily wastewater with the flow direction of upper entering and lower leaving with the microbubble flowed bottom-up
In small suspended particles or small molecule oil slick particle stick and be deposited on microbubble surface, form " the bubble that global density is less than water
Particle " complex simultaneously floats to the water surface, scum is formed, to realize preliminary level-one dissolved air flotation.
Oily wastewater after level-one dissolved air flotation flows downward to oleophilic drainage packing layer or floating type coalescent pack
Layer, wherein the oleophilic drainage filler loaded is demulsified to oily wastewater in such a way that Contact-sorption coalesces, small molecule oil droplet is broken
Larger oil droplet is formed after cream coalescence, floats in the induced effect of microbubble and realizes second level dissolved air flotation, forms larger oil droplet on upper layer
Scum.
Oily wastewater after two-stage dissolved air flotation flows to hydrophilic and oleophobic packing layer or fixed-bed type coalescence still further below
Packing layer, remaining part oil slick is rising microbubble in the continuous collision coalescence of hydrophilic and oleophobic filler surface in oily wastewater
Under induced effect, floats and realize three-level dissolved air flotation.
Finally, fixed-bed type coalescent pack plays a role in filtering in entire separation process, further eliminate containing greasy dirt
Suspended matter in water, the water purification being finally recovered out are discharged by water outlet, and respectively float the oily phase scum isolated in the process
Outstanding oil reservoir is formed, is taken out from top oil discharge outlet.
It include insoluble gas in pressure dissolving gas water described in step (1) as currently preferred technical solution.
Preferably, the insoluble gas is nitrogen, oxygen or air.
Preferably, the relative density < 1.0g/cm of oily wastewater described in step (2)3, such as can be 0.1g/cm3、
0.2g/cm3、0.3g/cm3、0.4g/cm3、0.5g/cm3、0.6g/cm3、0.7g/cm3、0.8g/cm3Or 0.9g/cm3。
Preferably, the petroleum substance content in the oily wastewater is 50~1000mg/L, such as can be 50mg/
L、100mg/L、150mg/L、200mg/L、250mg/L、300mg/L、350mg/L、400mg/L、450mg/L、500mg/L、
550mg/L, 600mg/L, 650mg/L, 700mg/L, 750mg/L, 800mg/L, 850mg/L, 900mg/L, 950mg/L or
1000mg/L。
Preferably, the suspension content in the oily wastewater be 50~5000mg/L, such as can be 100mg/L,
500mg/L, 1000mg/L, 1500mg/L, 2000mg/L, 2500mg/L, 3000mg/L, 3500mg/L, 4000mg/L or
4500mg/L。
Preferably, the petroleum substance content in step (4) described water phase is 10~100mg/L, such as can be 10mg/
L, 20mg/L, 30mg/L, 40mg/L, 50mg/L, 60mg/L, 70mg/L, 80mg/L, 90mg/L or 100mg/L.
Preferably, in the water phase suspension content be 10~100mg/L, such as can be 10mg/L, 20mg/L,
30mg/L, 40mg/L, 50mg/L, 60mg/L, 70mg/L, 80mg/L, 90mg/L or 100mg/L.
Preferably, the method also includes: after step (4), to backwash mouth in be passed through backwash medium.
Preferably, the backwash medium is compressed gas, counter-flushing liquid or gas-liquid mixture.
A kind of optional technical solution are as follows: after step (4), air bearing release is continued to run, and is continued to air inlet
It is passed through pressure dissolving gas water and backwash operation is carried out to packing layer, online aeration rinses filler and aeration quantity is non-constant, without parking
Rinse the continuous operation, it can be achieved that equipment.
Preferably, the oil removal rate > 80% of the method, for example, can be 81%, 82%, 83%, 84%, 85%,
86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%.
Preferably, the removal efficiency > 80% of the method, for example, can be 81%, 82%, 83%, 84%,
85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%.
As currently preferred technical solution, which comprises
(1) it is passed through pressure dissolving gas water to air inlet, opens air bearing release, the microbubble of generation passes through hydrophilic from the bottom to top
Oleophobic packing layer and oleophilic drainage packing layer or fixed-bed type coalescent pack layer and floating type coalescent pack layer；
(2) relative density < 1.0g/cm3Oily wastewater oily-water seperating equipment is passed through by top, through water distributor with the bottom of from
The microbubble that portion rises contacts, and the small molecule oil slick in oily wastewater floats under the action of microbubble, realizes level-one air bearing point
From, wherein the petroleum substance content in oily wastewater is 50~1000mg/L, and suspension content is 50~5000mg/L；
(3) oily wastewater after level-one dissolved air flotation carries out brokenly in oleophilic drainage packing layer or floating type coalescent pack layer
Cream is agglomerated into larger oil droplet, and larger oil droplet floats under the action of microbubble, realizes secondary air-floatation separation；
(4) oil residues in the oily wastewater after secondary air-floatation separation are mutually coalesced in hydrophilic and oleophobic packing layer or fixed-bed type
Collision coalescence in packing layer floats under the action of microbubble, realizes three-level dissolved air flotation, and the oil after floating is mutually arranged by top
Out, isolated water phase is discharged by bottom, and petroleum substance content is 10~100mg/L, suspension content 10 in water phase
~100mg/L；
(5) it is passed through backwash medium to backwash mouth after separation terminates, the backwash medium is compressed gas, recoil
Washing lotion or gas-liquid mixture.
Numberical range of the present invention not only includes enumerated point value, further includes the above-mentioned numerical value not included
Arbitrary point value between range, as space is limited and for concise consideration, range described in the present invention no longer exclusive list includes
Specific point value.
Compared with prior art, the invention has the benefit that
(1) present invention devises a kind of with compounded mix layer structure for the oily wastewater containing oil emulsion and dissolved oil
Oily-water seperating equipment, and a variety of isolation technics such as highly integrated absorption, coalescence demulsification, air bearing and filtering, are mentioned using the present invention
The oily-water seperating equipment of confession carries out water-oil separating to oily wastewater, the experimental results showed that the oil removal rate > 80% of the device, suspends
Object removal rate > 80%.
(2) present invention has not only acted as air bearing effect, and to packing layer by the way that air bearing release is arranged in bottom of device
The problem of playing backwash effect, effectively preventing oil droplet blocking filler.And apparatus structure is simple, integrated level is high, operation dimension
Shield is easy, occupied area is small, at low cost and separation process is without secondary pollution, is suitble to large-scale production application.
Detailed description of the invention
Fig. 1 is the structural representation for the totally enclosed type dynamic oil-water separating device that a specific embodiment of the invention provides
Figure；
Fig. 2 is the structural representation for the totally enclosed type dynamic oil-water separating device that another embodiment of the present invention provides
Figure；
Fig. 3 is the structural representation for the open type dynamic oil-water separating device that another embodiment of the present invention provides
Figure.
Wherein, 1- shell；2- compounded mix unit；21- oleophilic drainage packing layer；The hydrophilic and oleophobic packing layer of 22-；23- is floating
Dynamic formula coalescent pack layer；24- fixed-bed type coalescent pack layer；3- air bearing release；4- water distributor；5- oil discharge outlet；6- contains greasy dirt
Water inlet；7- air inlet；8- water outlet.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
In a specific embodiment, the present invention provides a kind of totally enclosed type dynamic oil-water separating device, the dresses
It sets as shown in Figure 1, being from top to bottom disposed with compounded mix unit 2 including shell 1, inside the shell 1 and for generating
The air bearing release 3 of microbubble.Wherein, the compounded mix unit 2 is from top to bottom disposed with oleophilic drainage packing layer
21 and hydrophilic and oleophobic packing layer 22.Water distributor 4 is additionally provided with above oleophilic drainage packing layer 21.
It is filled with oleophilic drainage filler in oleophilic drainage packing layer 21, is filled in hydrophilic and oleophobic packing layer 22 hydrophilic and oleophobic
Filler, the density of oleophilic drainage packing layer are less than the density of hydrophilic and oleophobic filler.Air bearing release 3 includes stainless steel perforated tube
Release head.
The top of shell 1 is equipped with oil discharge outlet 5, and top is equipped with oily wastewater import 6, and oily wastewater import 6 is located at the cloth
4 top of hydrophone；The lower part of shell 1 is equipped with air inlet 7, the pressure air-dissolving water inlet company of air inlet 7 and the air bearing release 3
It is logical；The bottom of shell 1 is equipped with water outlet 8 and backwash mouth.
In another embodiment, described the present invention provides a kind of totally enclosed type dynamic oil-water separating device
Device is as shown in Fig. 2, being from top to bottom disposed with compounded mix unit 2 including shell 1, inside the shell 1 and for producing
The air bearing release 3 of raw microbubble.Wherein, the compounded mix unit 2 is from top to bottom disposed with floating type coalescence and fills out
The bed of material 23 and fixed-bed type coalescent pack layer 24.Water distributor 4 is additionally provided with above floating type coalescent pack layer 23.
It is filled with oleophilic drainage filler in floating type coalescent pack layer 23, is filled with parent in fixed-bed type coalescent pack layer 24
Water oleophobic filler, air bearing release 3 include stainless steel perforated tube release head.
The top of shell 1 is equipped with oil discharge outlet 5, and top is equipped with oily wastewater import 6, and oily wastewater import 6 is located at the cloth
4 top of hydrophone；The lower part of shell 1 is equipped with air inlet 7, the pressure air-dissolving water inlet company of air inlet 7 and the air bearing release 3
It is logical；The bottom of shell 1 is equipped with water outlet 8 and backwash mouth.
The present invention in the shape and shell of shell 1 open amount and positional relationship be not particularly limited, Yi Zhongke
A kind of technical solution of choosing open type dynamic oil-water separating device as shown in Figure 3, the difference with Fig. 2 is only that shown in Fig. 3
Oily-water seperating equipment uses the shell structure of open type, and bottom lower head uses conical head, is conducive to liquid outflow, keeps away
Exempt from hydrops, the oil discharge outlet at top moves to shell side, remaining structure and positional relationship are identical as Fig. 2.Those skilled in the art
It should be understood that, oily-water seperating equipment shown in Fig. 3 is similarly one of claimed technical solution of the invention, not
Under the premise of the protection scope recorded beyond claim, routine is made that correlation properties such as shell structure, shape and materials
New solution caused by replacement, remodeling variant and known adjustment still fall within disclosure of the invention range and protection scope it
It is interior.
The positional relationship of open amount and opening on above-described shell is only used as the present invention a kind of more preferably
Technical solution, the present invention is not particularly limited the shell structure, open amount and its positional relationship of device, the skill of this field
Hull shape and structure is adaptively adjusted in place limitation when art personnel can arrange according to needs of production or equipment,
Associated openings on shell suitably can be deleted or be supplemented, such as: grease shown in Fig. 1, Fig. 2 and Fig. 3 of the present invention point
From device by water outlet and backwash mouth integrated setting, reduce the open amount on apparatus casing, those skilled in the art
Water outlet and backwash mouth can also be separately independently arranged by member, convenient for distinguishing the maintenance of different operation workshop section and later period,
Other variants and remodeling under the premise of without departing from technical solution documented by claim, belong to protection model of the invention
It encloses.
The present invention also provides a kind of dynamic oil-water separation methods, which comprises
(1) it is passed through pressure dissolving gas water to air inlet 7, opens air bearing release 3, the microbubble of generation is successively worn from the bottom to top
Hydrophilic and oleophobic packing layer 22 and oleophilic drainage packing layer 21 are crossed, or sequentially passes through fixed-bed type coalescent pack layer 24 from the bottom to top
With floating type coalescent pack layer 23；
(2) oily wastewater is passed through oily-water seperating equipment by the oily wastewater import 6 at top, through water distributor 4 and from bottom
The microbubble risen contacts, and the small molecule oil slick in oily wastewater floats under the action of microbubble, realizes level-one dissolved air flotation；
(3) oily wastewater after level-one dissolved air flotation in oleophilic drainage packing layer 21 or floating type coalescent pack layer 23 into
Row demulsification, is agglomerated into larger oil droplet, and larger oil droplet floats under the action of microbubble, realizes secondary air-floatation separation；
(4) oil residues in the oily wastewater after secondary air-floatation separation are mutually poly- in hydrophilic and oleophobic packing layer 22 or fixed-bed type
Collision coalescence in packing layer 24 is tied, is floated under the action of microbubble, realizes three-level dissolved air flotation, the oil after floating is mutually by top
Oil discharge outlet 5 be discharged, isolated water phase is discharged by the water outlet 8 of bottom；
(5) it is passed through backwash medium to backwash mouth after separation terminates, compounded mix layer 2 is backwashed.
Embodiment 1
Present embodiments provide a kind of dynamic oil-water separating device as shown in Figure 2, wherein the oleophilic drainage filler
For modified poly ethylene, density 1.2g/cm3, oily contact angle is 55 °；The hydrophilic and oleophobic filler is modified ceramic grain, density
For 1.8g/cm3, water contact angle is 48 °.
Use above-mentioned oily-water seperating equipment to density for 0.93g/cm3Oily wastewater carry out water-oil separating, wherein described
Oily wastewater in petroleum substance content be 50mg/L, suspension content 50mg/L, petroleum in the water outlet after water-oil separating
Substance content is 10mg/L, suspension content 10mg/L, is calculated to obtain oil removal efficiency to be 80% to experimental result, be hanged
Floating object removal rate is 80%.After water-oil separating, recoiled using compressed gas to the packing layer in oily-water seperating equipment
It washes.
Embodiment 2
Present embodiments provide a kind of dynamic oil-water separating device as shown in Figure 2, wherein the oleophilic drainage filler
For modified polypropene, density 2.0g/cm3, oily contact angle is 36 °；The hydrophilic and oleophobic filler is stainless steel wave card, close
Degree is 3.7g/cm3, water contact angle is 28 °.
Use above-mentioned oily-water seperating equipment to density for 0.95g/cm3Oily wastewater carry out water-oil separating, wherein described
Oily wastewater in petroleum substance content be 530mg/L, suspension content 2500mg/L, stone in the water outlet after water-oil separating
Oily substance content is 50mg/L, suspension content 100mg/L, is calculated to obtain oil removal efficiency to experimental result and stablizes and exists
94.3%, removal efficiency is stablized 96%.After water-oil separating, using counter-flushing liquid to filling out in oily-water seperating equipment
The bed of material is backwashed.
Embodiment 3
Present embodiments provide a kind of dynamic oil-water separating device as shown in Figure 2, wherein the oleophilic drainage filler
For modified poly ethylene, density 2.5g/cm3, oily contact angle is 20 °；The hydrophilic and oleophobic filler is iron carbon granules, and density is
5.6g/cm3, water contact angle is 10 °.
Use above-mentioned oily-water seperating equipment to density for 0.98g/cm3Oily wastewater carry out water-oil separating, wherein described
Oily wastewater in petroleum substance content be 1000mg/L, suspension content 5000mg/L, in the water outlet after water-oil separating
Petroleum substance content is 100mg/L, suspension content 200mg/L, is calculated to obtain oil removal efficiency to experimental result steady
It is scheduled on 90%, removal efficiency is stablized 96%.After water-oil separating, using gas-liquid mixture in oily-water seperating equipment
Packing layer backwashed.
Application Example 1
The separator provided using embodiment 1 carries out water-oil separating lab scale to the waste water generated in certain oil extraction in oil field technique
It tests, petroleum-type about 50mg/L~500mg/L, suspended matter about 50mg/L~500mg/L in oily wastewater of intaking；Isolated
Petroleum-type about 10mg/L~50mg/L in water purification, suspended matter 10mg/L~50mg/L, and effluent quality is limpider.Experiment is tied
Fruit is calculated to obtain oil removal efficiency stabilization 80% or more, and removal efficiency is 80% or more.
Application Example 2
Pilot plant test is carried out to certain desalting in oil refinery oily wastewater using the separator that embodiment 2 provides, water inlet contains
Oily water petroleum-type about 100mg/L~1000mg/L, suspended matter about 100mg/L~5000mg/L；It is discharged petroleum-type about 10mg/L
~100mg/L, suspended matter 20mg/L~100mg/L.Analysis of experimental data, oil removal efficiency are stablized 90% or more, and suspended matter is gone
Except rate is 80% or more.
Comparative example 1
Difference with dynamic oil-water separating device provided by the invention is, saves floating type coalescent pack layer, device its
His structure is same as Example 1.
The pilot plant test that Application Example 1 proposes is carried out using above-mentioned apparatus, petroleum-type is about in isolated water purification
30mg/L~250mg/L, suspended matter 30mg/L~350mg/L, are calculated to obtain oil removal efficiency to experimental result and are stablized and existed
50%, removal efficiency is stablized 60%.
Comparative example 2
This comparative example is a kind of oily-water seperating equipment disclosed in CN101972559A, and the oily-water seperating equipment is sleeping
Formula structure is with the main distinction of oily-water seperating equipment provided by the invention, water-oil separating disclosed in CN101972559A
Device is provided with two groups of fixed-bed type coalescent packs.
The pilot plant test that Application Example 1 provides is carried out using oily-water seperating equipment disclosed in CN101972559A, point
It is limpider from petroleum-type about 20mg/L~100mg/L, suspended matter 20mg/L~100mg/L, effluent quality in obtained water purification.It is right
Experimental result is calculated to obtain oil removal efficiency stabilization 80%, and removal efficiency is stablized 80%.
Comprehensive analysis embodiment 1, Application Example 1 and comparative example 1 are as can be seen that save floating type coalescent pack layer, only
Retain one group of hydrophilic and oleophobic fixed-bed type coalescent pack layer, the oil removal efficiency and removal efficiency of device are simultaneously not up to pre-
Phase is just able to achieve after needing to be demulsified to oil emulsion this is because the oil in oily wastewater mutually exists in the form of oil emulsion
Water-oil separating, comparative example 1 only remain hydrophilic and oleophobic filler, cannot achieve the demulsification of oily wastewater, lead to oil-water separation
It is not satisfactory.
Comprehensive analysis Application Example 1 and comparative example 2 are as can be seen that be changed to two layers of fixed-bed type coalescence for compounded mix layer
After packing layer, though oil removal rate and removal efficiency increase, but still separating effect not up to of the invention.This is because,
The demulsification to the oily wastewater of emulsified state is not implemented in two layers of fixed-bed type coalescent pack layer, only bent by detour between filler
Small oil droplet coalescence is realized at the process of larger oil droplet, to isolate the oil slick and dispersed oil in mixed liquor in the channel of folding.It can recognize
It is only capable of being separated for the oil water mixture containing oil slick and dispersed oil for oily-water seperating equipment disclosed in CN101972559A, and
For the oily wastewater for being in emulsified state, then it cannot achieve effective water-oil separating.In addition, CN101972559A
Disclosed in oily-water seperating equipment use horizontal type structure, be easy to cause sump oil to stockpile, be unfavorable for it is oily mutually produce, long-play
Easily packing layer is caused to block, it is difficult to clean；On the other hand, which uses two layers of fixed-bed type packing layer, improves and fills out
The replacement difficulty of material, shortens the cycle of operation of device, does not meet the continuous production requirement of industrial process.
The Applicant declares that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention not office
It is limited to this, it should be clear to those skilled in the art, any to belong to those skilled in the art and take off in the present invention
In the technical scope of dew, any changes or substitutions that can be easily thought of, and all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of compounded mix unit of dynamic water-oil separating, which is characterized in that the compounded mix unit includes oleophilic drainage
Filler and hydrophilic and oleophobic filler.
2. compounded mix unit according to claim 1, which is characterized in that the density of the oleophilic drainage packing layer is less than
The density of hydrophilic and oleophobic filler；
Preferably, the density of the oleophilic drainage filler is 1.2g/cm3~2.5g/cm3；
Preferably, the density of the hydrophilic and oleophobic filler is 1.8g/cm3~5.6g/cm3；
Preferably, the oleophilic drainage filler and oil 60 degree of contact angle <；
Preferably, 50 degree of contact angle < of the hydrophilic and oleophobic filler and water；
Preferably, the oleophilic drainage filler is selected from modified poly ethylene or modified polypropene；
Preferably, the hydrophilic and oleophobic filler is selected from modified ceramic grain, stainless steel wave card or iron carbon granules.
3. a kind of dynamic oily-water seperating equipment, which is characterized in that described device includes shell and is set to enclosure interior
Compounded mix unit and aeration unit for generating microbubble；The compounded mix unit and aeration unit are from top to bottom successively
Setting；The compounded mix unit is from top to bottom disposed with oleophilic drainage packing layer and hydrophilic and oleophobic packing layer；
Preferably, the oleophilic drainage packing layer uses oleophilic drainage filler as stated in claim 1 or 2；
Preferably, the hydrophilic and oleophobic packing layer uses hydrophilic and oleophobic filler as stated in claim 1 or 2.
4. a kind of dynamic oily-water seperating equipment, which is characterized in that described device includes shell, and the enclosure interior is from top to bottom
It is disposed with floating type coalescent pack layer, fixed-bed type coalescent pack layer and the aeration unit for generating microbubble.
5. device according to claim 4, which is characterized in that the floating type coalescent pack layer is filled out including oleophilic drainage
Material；
Preferably, the density of the oleophilic drainage filler is 1.2g/cm3~2.5g/cm3；
Preferably, 60 degree of oily contact angle < of the oleophilic drainage filler；
Preferably, the oleophilic drainage filler is modified poly ethylene or modified polypropene；
Preferably, the fixed-bed type coalescent pack layer includes hydrophilic and oleophobic filler；
Preferably, the density of the hydrophilic and oleophobic filler is 1.8g/cm3~5.6g/cm3；
Preferably, 50 degree of the water contact angle < of the hydrophilic and oleophobic filler；
Preferably, the hydrophilic and oleophobic filler is modified ceramic grain, stainless steel wave card or iron carbon granules.
6. according to the described in any item devices of claim 3-5, which is characterized in that the aeration unit is selected from air bearing release；
Preferably, the air bearing release includes air bearing release head；
Preferably, the air bearing release head is stainless steel perforated tube release head；
Preferably, water distributor is additionally provided with above the floating type coalescent pack layer, the water distributor is used for the entrance oil
The oily wastewater of water separation device is uniformly distributed；
Preferably, the top of the shell is equipped with oil discharge outlet；
Preferably, the upper part of the housing is equipped with oily wastewater import, and the oily wastewater import is located above the water distributor；
Preferably, the lower part of the housing is equipped with air inlet, the pressure air-dissolving water inlet of the air inlet and the air bearing release
Connection；
Preferably, the housing bottom is equipped with water outlet；
Preferably, the housing bottom is additionally provided with backwash mouth；
Preferably, it the water outlet and the backwash mouth integrated setting or is independently arranged.
7. a kind of method of dynamic water-oil separating, which is characterized in that the method is in the described in any item devices of claim 3-7
Middle progress.
8. the method according to the description of claim 7 is characterized in that the described method includes:
Oily wastewater passes through oleophilic drainage packing layer and hydrophilic and oleophobic packing layer, and the micro- gas generated with aeration unit from top to bottom
Bubble contact air bearing, realizes water-oil separating；Alternatively, oily wastewater passes through floating type coalescent pack layer from top to bottom and fixed-bed type is poly-
Packing layer is tied, and the microbubble generated with aeration unit contacts air bearing, realizes water-oil separating；
Preferably, the method specifically includes:
(1) it is passed through pressure dissolving gas water to air inlet, opens air bearing release, the microbubble of generation sequentially passes through hydrophilic from the bottom to top
Oleophobic packing layer and oleophilic drainage packing layer, or fixed-bed type coalescent pack layer and floating type coalescence are sequentially passed through from the bottom to top
Packing layer；
(2) oily wastewater is passed through oily-water seperating equipment by top, contacts through water distributor with the microbubble risen from bottom, contains greasy dirt
Small molecule oil slick in water floats under the action of microbubble, realizes level-one dissolved air flotation；
(3) oily wastewater after level-one dissolved air flotation is demulsified in oleophilic drainage packing layer or floating type coalescent pack layer,
It is agglomerated into larger oil droplet, larger oil droplet floats under the action of microbubble, realizes secondary air-floatation separation；
(4) oil residues in the oily wastewater after secondary air-floatation separation are mutually in hydrophilic and oleophobic packing layer or fixed-bed type coalescent pack
Collision coalescence in layer, floats under the action of microbubble, realizes three-level dissolved air flotation, and the oil after floating is mutually discharged by top, point
It is discharged from obtained water phase by bottom.
9. according to the method described in claim 8, it is characterized in that, comprising insoluble in pressure dissolving gas water described in step (1)
Gas；
Preferably, the insoluble gas is nitrogen, oxygen or air；
Preferably, the relative density < 1.0g/cm of oily wastewater described in step (2)3；
Preferably, the petroleum substance content in the oily wastewater is 50~1000mg/L；
Preferably, the suspension content in the oily wastewater is 50~5000mg/L；
Preferably, the petroleum substance content in step (4) described water phase is 10~100mg/L；
Preferably, suspension content is 10~100mg/L in the water phase；
Preferably, the method also includes: after step (4), to backwash mouth in be passed through backwash medium；
Preferably, the backwash medium is compressed gas, counter-flushing liquid or gas-liquid mixture；
Preferably, the oil removal rate > 80% of the method；
Preferably, the removal efficiency > 80% of the method.
10. according to the described in any item methods of claim 7-9, which is characterized in that the described method includes:
(1) it is passed through pressure dissolving gas water to air inlet, opens air bearing release, the microbubble of generation passes through hydrophilic and oleophobic from the bottom to top
Packing layer and oleophilic drainage packing layer or fixed-bed type coalescent pack layer and floating type coalescent pack layer；
(2) relative density < 1.0g/cm3Oily wastewater oily-water seperating equipment is passed through by top, through water distributor with from bottom rise
Microbubble contact, the small molecule oil slick in oily wastewater floats under the action of microbubble, realize level-one dissolved air flotation,
In, the petroleum substance content in oily wastewater is 50~1000mg/L, and suspension content is 50~5000mg/L；
(3) oily wastewater after level-one dissolved air flotation is demulsified in oleophilic drainage packing layer or floating type coalescent pack layer,
It is agglomerated into larger oil droplet, larger oil droplet floats under the action of microbubble, realizes secondary air-floatation separation；
(4) oil residues in the oily wastewater after secondary air-floatation separation are mutually in hydrophilic and oleophobic packing layer or fixed-bed type coalescent pack
Collision coalescence in layer, floats under the action of microbubble, realizes three-level dissolved air flotation, and the oil after floating is mutually discharged by top, point
Be discharged from obtained water phase by bottom, in water phase petroleum substance content be 10~100mg/L, suspension content be 10~
100mg/L；
(5) it is passed through backwash medium to backwash mouth after separation terminates, the backwash medium is compressed gas, counter-flushing liquid
Or gas-liquid mixture.
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Application publication date: 20190430 |