CN110316857A - The method and apparatus of processing cutting liquid - Google Patents
The method and apparatus of processing cutting liquid Download PDFInfo
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- CN110316857A CN110316857A CN201910066475.3A CN201910066475A CN110316857A CN 110316857 A CN110316857 A CN 110316857A CN 201910066475 A CN201910066475 A CN 201910066475A CN 110316857 A CN110316857 A CN 110316857A
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- 239000007788 liquid Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005520 cutting process Methods 0.000 title claims abstract description 17
- 238000012545 processing Methods 0.000 title claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 137
- 239000012528 membrane Substances 0.000 claims abstract description 131
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000000926 separation method Methods 0.000 claims abstract description 60
- 239000002173 cutting fluid Substances 0.000 claims abstract description 49
- 239000012141 concentrate Substances 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000010992 reflux Methods 0.000 claims abstract description 15
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 238000000053 physical method Methods 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 70
- 238000003860 storage Methods 0.000 description 31
- 238000001914 filtration Methods 0.000 description 21
- 239000003921 oil Substances 0.000 description 16
- 238000004140 cleaning Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
-
- 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
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F2001/007—Processes including a sedimentation step
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of method of processing cutting liquid, includes the following steps: to be heated to cutting fluid within the scope of 50 DEG C to 95 DEG C；Cutting fluid after heating is stood, so that it is divided into upper layer and lower layer, is at the middle and upper levels oily phase, lower layer is water phase；Cutting fluid after layering is subjected to Liquid liquid Separation, obtains oily phase and water phase；And under the first operating pressure, the water phase is flowed through into first order ceramic membrane, the first concentrate for obtaining the first filtered fluid through the first order ceramic membrane and being formed by the first order ceramic membrane interception, the water inlet by least part reflux of first concentrate as the first order ceramic membrane.The present invention does not use chemical agent, can effectively deal with cutting fluid only with physical method.The invention further relates to corresponding devices.
Description
Technical field
The present invention relates to the separation technology fields of mixture, and in particular to a kind of method and apparatus of processing cutting liquid.
Background technique
With the fast development of modern mechanical manufacturing industry, cutting fluid is widely applied in machining, and dosage is fast
Speed increases.But cutting fluid becomes industrial wastes using that will fail after certain time limit.The main reason for cutting fluid fails be it
Certain impurity are inevitably mixed into during being recycled, such as metallic (clast), dust, abrasive material powder, fiber, are dissociated
Miscellaneous oil, the water etc. in cutting oil.When these impurity contents are higher, cutter and surface to be machined can be impaired in use.
Furthermore these impurity are the dominant catalysts of cutting fluid oxidation deterioration, and it is higher that they can accelerate the chemical change of cutting fluid to cause
Acidity and biggish interfacial tension, to make cutting fluid deterioration failure.Discarded cutting fluid how is handled, oil therein is recycled,
Reduce waste pollutant discharge, it has also become an important topic of cutting fluid research.
General enterprises often use biochemical method, coacervation, gravitational separation process, the precipitation method, aeration, electrolysis method, gas floatation process at present
It is handled Deng to cutting fluid.But waste oil of the above-mentioned several techniques in recycling cutting fluid, purifies on the waste water in cutting fluid still
There is a situation where ineffective, inefficient.
Summary of the invention
The present invention provides the method and related device of a kind of processing cutting liquid.
On the one hand, the embodiment of the present invention is related to a kind of method of processing cutting liquid, comprising:
(1) cutting fluid is heated within the scope of 50 DEG C to 95 DEG C；
(2) cutting fluid after heating is stood, so that it is divided into upper layer and lower layer, be at the middle and upper levels oily phase, lower layer is water phase；
(3) cutting fluid after layering is subjected to Liquid liquid Separation, obtains oily phase and water phase；And
(4) under the first operating pressure, the water phase is flowed through into first order ceramic membrane, is obtained through the first order ceramics
First filtered fluid of film and the first concentrate formed by the first order ceramic membrane interception, at least by first concentrate
Water inlet of a part reflux as the first order ceramic membrane.
In certain embodiments, other than using single-stage ceramic membrane separation to water phase, method of the invention may include pair
The water phase is using multistage ceramic membrane separation.When using multistage ceramic membrane separation, the filtered fluid that upper level is isolated, by adding
Pressure, into next stage ceramic membrane, at least part reflux for the concentrate that next stage ceramic membrane separation obtains is separated with upper level
Filtered fluid mixing out, the water inlet as next stage ceramic membrane.In some embodiments, the method for the present invention includes two-stage potteries
Porcelain UF membrane step further includes following steps on the basis of above-mentioned (1)-(4) step:
(5) under the second operating pressure, first filtered fluid is flowed through into second level ceramic membrane, is obtained through described second
Second filtered fluid of grade ceramic membrane and the second concentrate formed by the second level ceramic membrane interception, by second concentrate
At least part flow back water inlet as the second level ceramic membrane, wherein second operating pressure is higher than described first
Operating pressure.
In certain embodiments, in step (1), cutting fluid can be heated to higher temperature, and as escribed above 50
DEG C to 95 DEG C, within the scope of preferably 60 DEG C to 90 DEG C, within the scope of more preferable 70 DEG C to 85 DEG C.
In certain embodiments, in step (2), the time of the standing can determine according to practical delamination, to oil
Mutually and the interface of water phase is clear.In certain embodiments, time of repose can be 20 to 120 minutes.
In certain embodiments, in step (2), during the standing, the cutting fluid after making the heating is naturally cold
But.In other embodiments, in step (2), during the standing, the cutting fluid after making the heating is kept the temperature 60
DEG C within the scope of 80 DEG C, it is preferable that heat preservation is at 80 DEG C.
On the other hand, the embodiment of the present invention is related to a kind of device of processing cutting liquid, comprising:
Heating unit, including heating equipment and Temperature-controlled appliance, for cutting fluid to be heated to 50 DEG C to 95 DEG C ranges
It is interior；
Liquid liquid Separation unit stands for the cutting fluid after heating, it is made to be divided into upper layer and lower layer, is at the middle and upper levels oil
Phase, lower layer are water phase, and the cutting fluid after layering is carried out Liquid liquid Separation, obtain oily phase and water phase；
First order ceramic membrane separation unit, including first order ceramic membrane and the first supercharging equipment, in the first operation pressure
The water phase is filtered under power, obtains the first filtered fluid through the first order ceramic membrane, and cut by the first order ceramic membrane
Stay the first concentrate to be formed；
First reflux unit, at least part of first concentrate to be back to the first order ceramic membrane
Water inlet；And
For connecting the pipe of the heating unit, the Liquid liquid Separation unit and the first order ceramic membrane separation unit
Road.
In certain embodiments, the aperture of the first order ceramic membrane is within the scope of 20 to 50nm, operating pressure 2-
10Bar crosses film temperature within the scope of 50 DEG C to 95 DEG C.
In certain embodiments, the device of the invention may include multistage ceramic membrane separation unit, in this case, this
The device of invention further includes other than including first order ceramic membrane separation unit, for example, the second level, the third level, the fourth stage, etc.
Deng ceramic membrane separation unit.When using multiple ceramic membrane separation units, filtrate outlet and the next stage ceramics of upper level
The entrance of film separation unit is connected, the concentrated solution outlet and upper level ceramic membrane separation unit of next stage ceramic membrane separation unit
Entrance be connected.Wherein, the aperture of next stage ceramic membrane is less than the aperture of upper level ceramic membrane, the operation of next stage ceramic membrane
Pressure is greater than the operating pressure of upper level ceramic membrane.In some embodiments, the device of the invention further includes second level ceramics
Film separation unit, including second level ceramic membrane and the second booster pump, for filtering first filtering under the second operating pressure
Liquid obtains the second filtered fluid through the second level ceramic membrane, and dense by the second of second level ceramic membrane interception formation
Contracting liquid；And second reflux unit, at least part of second concentrate to be back to the second level ceramic membrane
Water inlet.Further, the aperture of the second level ceramic membrane is within the scope of 1 to 20nm, operating pressure 3-20Bar, crosses film
Temperature is within the scope of 50 DEG C to 95 DEG C.
In certain embodiments, the device of the invention further includes the first energy recovery unit, for making the water phase and institute
It states and carries out energy exchange between the first concentrate.Further, the device of the invention further includes the second energy recovery unit, is used
Energy exchange is carried out between the feed liquor and the second concentrate for making second level ceramic membrane separation unit.
In certain embodiments, the device of the invention further includes third reflux unit, for by first concentrate
At least part is back to the heating unit.
Then the method for processing cutting liquid of the invention and corresponding device carry out grease point first by heating demulsification type
From water phase is further processed finally by ceramic membrane filter.In the whole process, chemical agent is not used, using adding
The physical methods such as heat, filtering, it is easy to operate.As described above, ceramic membrane filter can use single-stage ceramic membrane unit, can also adopt
With multistage ceramic membrane unit.
Detailed description of the invention
Attached drawing and following detailed description are used to help understand the features and advantages of the present invention, in which:
Fig. 1 is the structural schematic diagram of the device 100 of processing cutting liquid according to an embodiment of the present invention.
Specific embodiment
Unless clearly separately defining in the application, the meaning of used scientific and technical terms is herein described skill
The meaning that the technical staff in art field is generally understood."include", "comprise" used herein, " having " or " containing " with
And other than similar word refers to project and its equivalent in addition to being listed in thereafter, other projects can also be within range.
Approximate term in the application is used to modify quantity, indicates also to wrap the present invention is not limited to the particular number
Include the modified part with quantity change that is close, acceptable, not will lead to dependency basis this function.Correspondingly, with
" about ", " about ", a numerical value of the modification such as " left and right ", mean that the present invention is not limited to the exact numericals.In certain embodiments,
Approximate term likely corresponds to the precision of the instrument of measurement numerical value.Numberical range in the present invention can merge and/or exchange, and remove
Non- separately clearly to illustrate, numberical range includes all numerical value subranges that it is covered.
In the specification and in the claims, unless clearly otherwise indicating, single plural number of all items is without restriction.This
" first ", " second " used in application specification and claims and similar word are not offered as any sequence, number
Amount or importance, and be used only to distinguish different material or embodiment etc..
Unless the context clearly dictates otherwise, term "or", "or" are not meant to exclusive, and are referred to exist and be referred to
At least one of project (such as ingredient), and include the case where referring to that the combination of project may exist.
Referred in this specification " some embodiments " etc., indicate a kind of specific factor related to the present invention (such as
Feature, structure and/or feature) it is comprised at least one embodiment described in this specification, it may or can not come across
In other embodiments.In addition, it is necessary to understand, the invention element can combine in any suitable manner.
" the oily phase " referred in the application refers to oil mixture as main component, such as may still contain in " oily phase "
A small amount of water.Equally, " water phase " referred in the application refers to water mixture as main component, such as still may in " water phase "
Contain a small amount of oil or other ingredients.
Below in conjunction with Detailed description of the invention embodiments of the present invention.Fig. 1 is processing cutting liquid according to an embodiment of the present invention
The structural schematic diagram of device 100.Device 100 includes heating unit 101, Liquid liquid Separation unit 103, oily phase storage tank 105, water phase storage
Tank 107, first order ceramic membrane separation unit 109, the first filtering liquid storage tank 111 and connecting pipe.Wherein, the connecting tube
Road includes: the inlet tube 151 of heating unit 101, the connecting pipe 153 of heating unit 101 and Liquid liquid Separation unit 103, liquid liquid
The connecting pipe 155,157 with oily phase storage tank 105, water phase storage tank 107 respectively of separative unit 103, water phase storage tank 107 and the first order
The connecting pipe 159 of 109 entrance of ceramic membrane separation unit, the filtrate outlet and first of first order ceramic membrane separation unit 109
The connecting pipe 163 of liquid storage tank 111 is filtered, and, connect the concentrated solution outlet and water phase of first order ceramic membrane separation unit 109
The reflux line 165 of storage tank 107.
Heating unit 101 includes heating equipment and temperature control equipment, for heating cutting fluid to be processed.A certain specific
In embodiment, heating unit 101 heats cutting fluid using electrically heated rod.
Liquid liquid Separation unit 103 includes any equipment that can be realized oily phase and aqueous phase separation.In certain embodiments, liquid
Liquid separative unit 103 is used using oily mutually with the density contrast of water phase as the gravity separator tank of motive force.
First order ceramic membrane separation unit 109 includes first order ceramic membrane and the first supercharging equipment, for filtering the water
Phase obtains the first filtered fluid through the first order ceramic membrane, and dense by the first of first order ceramic membrane interception formation
Contracting liquid.The aperture of the first order ceramic membrane is within the scope of 20 to 50nm, operating pressure 2-10Bar, crosses film temperature at 50 DEG C
To within the scope of 95 DEG C.First supercharging equipment can use centrifugal pump.
In 100 processing cutting liquid of use device, cutting fluid enters heating unit 101 by pipeline 151, in heating unit
In be heated within the scope of 50 DEG C to 95 DEG C；Then the cutting fluid after heating is introduced into Liquid liquid Separation unit 103 by pipeline 153
Middle standing, makes it be divided into upper layer and lower layer, is at the middle and upper levels oily phase, and lower layer is water phase, time of repose can depending on delamination,
Such as stand until oil-water interfaces are clear, in certain embodiments, time of repose is 20 to 120 minutes；Then, it will be layered
Cutting fluid afterwards carries out Liquid liquid Separation, obtains oily phase and water phase, oil is communicated piping 155 and introduces oily phase storage tank 105, by water phase
Water phase storage tank 107 is introduced by pipeline 157；Water phase is introduced into first order ceramic membrane separation unit 109 by pipeline 159, into
Row pressure filtration obtains the first filtered fluid and the first concentrate；First filtered fluid is introduced into the storage of the first filtered fluid by pipeline 163
First concentrate is back to water phase storage tank 107 by reflux line 165 by tank.
For the oily phase in oily phase storage tank 105, resource utilization can be carried out, for example, can be used as fuel, or conveying
To the further freshening of oil plant.
In certain embodiments, device 100 further includes the connecting pipe between water phase storage tank 107 and heating unit 101
161, at least part of liquid in water phase storage tank 107 to be back to heating unit 101.Liquid in water phase storage tank 107
Including the water phase from Liquid liquid Separation unit 103, and the first concentrate from the retention of the first ceramic membrane separation unit 109,
At least part of this liquid is back to heating unit 101 by pipeline 161, can again by heating and Liquid liquid Separation into
Row water-oil separating.
In certain embodiments, device 100 further includes the reflux for connecting the first filtering liquid storage tank 111 and water phase storage tank 107
Pipeline 175, at least part of the first filtered fluid to be back to water phase storage tank.As separation carries out, the storage of the first filtered fluid
The concentration of the oil of the first filtered fluid in tank constantly increases, and be easy to cause the blocking of the smaller second level ceramic membrane in aperture, therefore
At least part of first filtered fluid is flowed back into water phase storage tank, is able to maintain the steady of concentration oily in the first filtering liquid storage tank
It is fixed.
In certain embodiments, device 100 further includes cleaning liquid storage tank 113 and connection cleaning liquid storage tank 113 and every level-one
The pipeline of ceramic membrane, such as pipeline 167,177.Stored cleaning solution is adopted as one embodiment in cleaning liquid storage tank 113
With the sodium hydroxide hot solution (for example, 80 DEG C) of 5% mass fraction.It, can be by ceramic membrane in 10bar after ceramic membrane is blocked
Pressure under using cleaning solution clean 1 hour, to restore at least part of flux of ceramic membrane.
In certain embodiments, device 100 further include: second level ceramic membrane separation unit 117, the second filtering liquid storage tank
119, the pipeline 169 of connection the first filtering liquid storage tank 111 and 117 entrance of second level ceramic membrane separation unit, connection second level pottery
The pipeline 171 of 117 filtrate outlet of porcelain film separation unit and the second filtering liquid storage tank 119, and, connection second level ceramic membrane point
Reflux line 173 from 117 concentrated solution outlet of unit and the first filtering liquid storage tank 111.Second level ceramic membrane separation unit 117 can
With the first filtered fluid is for re-filtering, achieve the purpose that be further purified.The aperture of the second level ceramic membrane 1 to
Within the scope of 20nm, operating pressure 3-20Bar crosses film temperature within the scope of 50 DEG C to 95 DEG C.
In certain embodiments, device 100 further includes the multistage ceramic membrane separation unit (not shown) such as third, 4th.Institute
State third, the connection type of fourth stage ceramic membrane separation unit can analogy second level ceramic membrane separation unit connection type.Its
In, the aperture of rear stage ceramic membrane is less than the aperture of previous stage ceramic membrane, and the operating pressure of rear stage is higher than the operation of previous stage
Pressure.
In certain embodiments, device 100 further includes the first energy recovery unit 115, for making first order ceramic membrane point
Energy exchange is generated between feed liquor and the first concentrate from unit 109.First concentrate has high pressure, is filled by energy regenerating
It sets, it can be to the feed pressurization of the first ceramic membrane separation unit.Further, device 100 can also include the second energy regenerating
Unit 121 generates energy exchange between the feed liquor and the second concentrate for making second level ceramic membrane separation unit 117.At certain
In a little embodiments, energy recycle device is the turbo- mechanical mechanism of the both ends band an of axis, utilizes the second concentrate
High-pressure flow impacts the first turbine therein, rotates the first turbine, drives the rotation of the second turbine, the rotation of the second turbine by axis
It is diverted to improve the pressure of the feed liquor of second level ceramic membrane separation unit 117.
The method of processing cutting liquid of the invention is further illustrated below by way of comparative example and specific experiment example.Example
Employed in ceramic membrane be Nanjing forint moral Environmental Protection Technology Co., Ltd produce 50 centimeter lengths, aperture is respectively 25nm, 8nm
Ceramic membrane element.
Comparative example
Take 20 kilograms of cutting fluids that head tanks are added, do not heat, be forced into 10bar by centrifugal pump at room temperature, directly into
Enter single branch ceramic membrane in the 0.5 meter long aperture 8nm, cutting fluid is separated into two stream stocks: first-class stock is the mistake of permeation ceramic membrane
Filtrate, second stock are by the concentrate of ceramic membrane interception.Collect filtered fluid；Concentrate is back to head tank, with cutting fluid
Raw material enters above-mentioned ceramic membrane and continues with.As filtering carries out, the filtering flow quantity of ceramic membrane is gradually reduced, and about spends 5 minutes,
No filtered fluid outflow, is collected into the filtered fluid 15ml of permeation ceramic membrane altogether at this time.
Example one
It takes 20 kilograms of cutting fluids that head tank is added, cutting fluid is heated to 80 DEG C, stands 30 minutes, cutting fluid is divided
Layer, for density, smaller, brownish oily phase, lower layer are that density is larger on upper layer, and be translucent flaxen water phase, isolated
Oily is respectively mutually 0.6 kilogram, 19.4 kilograms with the quality of water phase.Water phase after separation is forced into 10bar by centrifugal pump, into
Enter single branch ceramic membrane in the 0.5 meter long aperture 8nm, water phase is separated into two stream stocks: first-class stock is the filtering of permeation ceramic membrane
Liquid, second stock are by the concentrate of ceramic membrane interception.Collect filtered fluid；Concentrate is back to water phase storage tank, then with pottery
Porcelain film continues with, and so recycles.As filtering carries out, the filtering flow quantity of permeation ceramic membrane is gradually reduced, and about spends 60 minutes,
No filtered fluid outflow, is collected into 2.2 kilograms of filtered fluid of permeation ceramic membrane altogether at this time.
Example two
10 kilograms of obtained concentrate in example one are taken, are heated to 80 DEG C, after standing 30 minutes, shared oil phase and water
Phase, oil is mutually and the weight of water phase is respectively 0.1 kilogram, 9.9 kilograms.
Example three
It takes 20 kilograms of cutting fluids that head tank is added, cutting fluid is heated to 80 DEG C, stands 30 minutes, cutting fluid is divided
Layer, for density, smaller, brownish oily phase, lower layer are that density is larger on upper layer, and be translucent flaxen water phase, isolated
Oily is respectively mutually 0.6 kilogram, 19.4 kilograms with the quality of water phase.Water phase after separation is forced into 5bar by centrifugal pump, into
Enter single branch ceramic membrane in the 0.5 meter long aperture 25nm, water phase is separated into two stream stocks: the first filtered fluid of permeation ceramic membrane and by
First concentrate of ceramic membrane interception.Collect the first filtered fluid；First concentrate is back to water phase storage tank, then uses ceramic membrane
It continues with, so recycles.As filtering carries out, the first filtering flow quantity is gradually reduced, and about spends 120 minutes, no first filtering
Liquid stream goes out, and is collected into 12.3 kilograms of the first filtered fluid of permeation ceramic membrane altogether at this time.
By it is being collected into, through the first filtered fluid of 25nm ceramic membrane be forced into 10bar by centrifugal pump, into 0.5 meter
Single branch ceramic membrane in the long aperture 8nm, the first filtered fluid are separated into two stream stocks: the second filtered fluid of permeation ceramic membrane and being made pottery
Second concentrate of porcelain film retention.The second filtered fluid is collected, the second concentrate is mixed with the first filtered fluid, then uses the hole 8nm
Diameter ceramic membrane continues with, and so recycles.As filtering carries out, the flow of the second filtered fluid is gradually reduced, and about spends 80 minutes, nothing
The outflow of second filtered fluid, is collected into 5.6 kilograms of the second filtered fluid of permeation ceramic membrane altogether at this time.
In above-mentioned comparative example, ceramic membrane processing cutting liquid is directlyed adopt, although being filtered by ceramic membrane filter
Liquid, but the method for the processing cutting liquid is very easy to cause the blocking of ceramic membrane, needs frequent clean ceramic membrane.
In example one, the method for single-stage ceramic membrane filter is added using the Liquid liquid Separation of the embodiment of the present invention, is adopted first
With heating demulsification type, stratification, Liquid liquid Separation obtains oily phase and water phase, and most of oil in cutting fluid is separated out, and then will
The ceramic film process of water phase, obtains purer filtered fluid.During ceramic membrane filter, ceramic membrane is not easy to block.
In example two, the concentrate of heating ceramic film retention, it is found that concentrate is divided into oily phase and water phase two after heating
Layer, illustrates the concentrate for ceramic membrane interception, can carry out water-oil separating again by the method for heating.
In example three, the method for two-stage ceramic membrane filter is added using the Liquid liquid Separation of the embodiment of the present invention, is adopted first
With heating demulsification type, stratification, Liquid liquid Separation obtains oily phase and water phase, and most of oil in cutting fluid is separated out, and then will
The ceramic film process of water phase improves the efficiency of ceramic film process water phase, same using the combination of two-stage different pore size ceramic membrane
Under the conditions of can obtain more clear liquid, ceramic membrane is also not easy to block.
The device and method of above processing cutting liquid is only the preferred embodiment of the present invention, it is noted that for this
For the those of ordinary skill of technical field, without departing from the principle of the present invention, it can also make several improvements and moisten
Decorations, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (10)
1. a kind of method of processing cutting liquid, which comprises the steps of:
(1) cutting fluid is heated within the scope of 50 DEG C to 95 DEG C；
(2) cutting fluid after heating is stood, so that it is divided into upper layer and lower layer, be at the middle and upper levels oily phase, lower layer is water phase；
(3) cutting fluid after layering is subjected to Liquid liquid Separation, obtains oily phase and water phase；And
(4) under the first operating pressure, the water phase is flowed through into first order ceramic membrane, is obtained through the first order ceramic membrane
First filtered fluid and the first concentrate formed by the first order ceramic membrane interception, by least one of first concentrate
Divide water inlet of the reflux as the first order ceramic membrane.
2. according to the method described in claim 1, further including following steps:
(5) under the second operating pressure, first filtered fluid is flowed through into second level ceramic membrane, obtains making pottery through the second level
Second filtered fluid of porcelain film and the second concentrate formed by the second level ceramic membrane interception, extremely by second concentrate
Water inlet of few a part reflux as the second level ceramic membrane, wherein second operating pressure is higher than first operation
Pressure.
3. according to the method described in claim 1, wherein, in the step (1), cutting fluid is heated to 60 DEG C to 80 DEG C models
In enclosing.
4. according to the method described in claim 1, wherein, in the step (2), during the standing, making the heating
Cutting fluid natural cooling afterwards, or, making the heat preservation of the cutting fluid after the heating within the scope of 60 DEG C to 80 DEG C.
5. a kind of device of processing cutting liquid characterized by comprising
Heating unit, including heating equipment and Temperature-controlled appliance, for cutting fluid to be heated within the scope of 50 DEG C to 95 DEG C；
Liquid liquid Separation unit stands for the cutting fluid after heating, so that it is divided into upper layer and lower layer, be at the middle and upper levels oily phase, under
Layer is water phase, and the cutting fluid after layering is carried out Liquid liquid Separation, obtains oily phase and water phase；
First order ceramic membrane separation unit, including first order ceramic membrane and the first supercharging equipment, under the first operating pressure
The water phase is filtered, obtains the first filtered fluid through the first order ceramic membrane, and by the first order ceramic membrane interception shape
At the first concentrate；
First reflux unit, for by least part of first concentrate be back to the first order ceramic membrane into
Water；And
For connecting the pipeline of the heating unit, the Liquid liquid Separation unit and the first order ceramic membrane separation unit.
6. device according to claim 5, wherein the aperture of the first order ceramic membrane is within the scope of 20 to 50nm, behaviour
Making pressure is 2-10Bar, crosses film temperature within the scope of 50 DEG C to 95 DEG C.
7. device according to claim 5, further includes:
Second level ceramic membrane separation unit, including second level ceramic membrane and the second supercharging equipment, under the second operating pressure
First filtered fluid is filtered, obtains the second filtered fluid through the second level ceramic membrane, and by the second level ceramic membrane
Retain the second concentrate formed；And
Second reflux unit, for by least part of second concentrate be back to the second level ceramic membrane into
Water.
8. device according to claim 7, wherein the aperture of the second level ceramic membrane is less than the first order ceramic membrane
Aperture, second operating pressure be greater than first operating pressure.
9. device according to claim 7, wherein the aperture of the second level ceramic membrane is within the scope of 1 to 20nm, operation
Pressure is 3-20Bar, crosses film temperature within the scope of 50 DEG C to 95 DEG C.
10. device according to claim 5, further includes: third reflux unit, for by first concentrate at least
A part is back to the heating unit.
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| CN201910066475.3A CN110316857A (en) | 2019-01-24 | 2019-01-24 | The method and apparatus of processing cutting liquid |
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| CN201910066475.3A CN110316857A (en) | 2019-01-24 | 2019-01-24 | The method and apparatus of processing cutting liquid |
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