CN113244661A - Dehydration purification device and dehydration purification method - Google Patents
Dehydration purification device and dehydration purification method Download PDFInfo
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- CN113244661A CN113244661A CN202110566537.4A CN202110566537A CN113244661A CN 113244661 A CN113244661 A CN 113244661A CN 202110566537 A CN202110566537 A CN 202110566537A CN 113244661 A CN113244661 A CN 113244661A
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- 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
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
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- 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
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/085—Thickening liquid suspensions by filtration with membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0008—Working-up used lubricants to recover useful products ; Cleaning with the use of adsorbentia
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/005—Working-up used lubricants to recover useful products ; Cleaning using extraction processes; apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0083—Lubricating greases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/06—Working-up used lubricants to recover useful products ; Cleaning by ultrafiltration or osmosis
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Lubricants (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a dehydration purification device and a dehydration purification method, wherein the dehydration purification device comprises a hollow semi-permeable membrane liquid-liquid contactor and a hollow semi-permeable membrane arranged inside the hollow semi-permeable membrane liquid-liquid contactor; the inner side of the hollow semi-permeable membrane is a channel of oil-water mixed liquid, and the outer side of the hollow semi-permeable membrane is hydrophilic solution, wherein the hydrophilic solution is at least one of diethanolamine solution, triethanolamine solution, diethylene glycol solution or triethylene glycol solution; when the oil-water mixed solution flows in the channel, water in the oil-water mixed solution penetrates through the semi-permeable membrane to enter the hydrophilic solution, and the process of dehydrating and purifying the lubricating oil is completed. The invention has the advantages of no phenomenon of oil product miscible phase and oil product pollution in the dehydration and purification process, simple operation and lower energy consumption compared with the traditional dehydration method. The invention can be used for on-line continuous dehydration of gear lubricating oil.
Description
Technical Field
The invention belongs to the technical field of lubricating oil dehydration and purification, and relates to improvement of a wind power gear lubricating oil dehydration technology, in particular to a dehydration and purification device and a dehydration and purification method.
Background
With the gradual development of low-carbon economy, wind power is an important component of clean energy and is rapidly developed in recent years. The gear lubricating oil is used as an indispensable working solution for guaranteeing the operation of the wind power motor, and can inevitably be invaded by moisture in the rotation process of the wind power gear, the invasion of the moisture can also cause the emulsification of the lubricating oil and the increase of the dissolved oxygen amount, the oxidation and deterioration of the lubricating oil are accelerated, hydrocarbon oxides and saponificates are generated, and the great reduction of the lubricating effect and even the abrasion and corrosion of a gear bearing are caused. Therefore, the water removal and purification of the wind power gear lubricating oil are important parts of the online maintenance of the wind power gear lubricating oil.
In order to avoid influencing the operation of the fan and purifying the lubricating oil after the fan is stopped, the method of continuous water removal is adopted to carry out online water removal and purification on the lubricating oil. Common methods for dehydrating lubricating oils include sedimentation, vacuum evaporation, centrifugation, and induced agglomeration, but have their own drawbacks. In the lubricating oil dehydration and purification method, the sedimentation method has simple process but long time consumption and is greatly influenced by factors such as viscosity, emulsification degree and the like; the vacuum evaporation method has complex process and high energy consumption, and can not realize continuous dehydration; the centrifugal method can not realize continuous dehydration of the lubricating oil, and has complex process and higher energy consumption; the induced agglomeration method is greatly influenced by the viscosity of the lubricating oil and has lower processing speed.
At present, a continuous water removal method based on a water mass transfer process is available abroad (US 6478953B 2), the method uses a hollow fiber membrane, lubricating oil passes through the inside of the hollow fiber membrane in a hollow fiber membrane liquid-gas contactor, compressed air flow is arranged on the outer side of the hollow fiber membrane, and water molecules are subjected to mass transfer through the membrane and enter a gas phase to be taken away by the air flow. The method can remove emulsified water, dissolved water and combined water in lubricating oil, but the water removal process needs to adopt compressed air flow, the dryness of the air is difficult to maintain, and the constant and efficient mass transfer efficiency is difficult to maintain. The adoption of a hollow fiber membrane liquid-liquid contactor to remove water in the wind power gear lubricating oil has not been reported.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an oil-water separation device and a using method thereof. In the process of water removal, moisture in the lubricating oil enters the absorption liquid through the membrane contact interface, and after the mass transfer process is completed, the moisture is absorbed and taken away by the absorption liquid. The invention can continuously dehydrate the lubricating oil of the wind power gear and realize the online maintenance of the lubricating oil.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a dehydration purification device comprises a hollow semi-permeable membrane liquid-liquid contactor and a hollow semi-permeable membrane which is arranged in the hollow semi-permeable membrane liquid-liquid contactor and used for oil-water mixed liquid to pass through;
the inner side of the hollow semi-permeable membrane is a channel of oil-water mixed liquid, and the outer side of the hollow semi-permeable membrane is absorption liquid;
and a cavity for containing absorption liquid is arranged between the outer side of the hollow semi-permeable membrane and the inner wall of the hollow semi-permeable membrane liquid-liquid contactor.
In one embodiment of the present invention, the hollow semi-permeable membrane is a tubular membrane, the inner side of the tubular membrane is a passage for the oil-water mixture, and the outer side of the tubular membrane is the absorption liquid.
As another limitation of the present invention, the hollow semi-permeable membrane is one of a cellulose membrane, a chitosan membrane and a polyvinyl alcohol membrane.
In a third aspect of the present invention, the oil-water mixture is a lubricating oil product containing at least one of emulsified water, free water and dissolved water.
As a fourth limitation of the present invention, the hydrophilic solution is at least one of a diethanolamine solution, a triethanolamine solution, a diethylene glycol solution, and a triethylene glycol solution.
As a fifth definition of the present invention, the tubular membrane is a bellows membrane or a spiral tubular membrane, and the tubular membrane is entirely immersed in the absorbent liquid.
The invention also discloses a method for dehydrating and purifying by using the dehydration and purification device, which comprises the steps of introducing oil-water mixed liquid into the inner side of the hollow semi-permeable membrane from the inlet of the dehydration and purification device, placing absorption liquid on the outer side of the hollow semi-permeable membrane, forming a reaction interface for liquid-liquid two-phase extraction by using the selective permeability of the hollow semi-permeable membrane, and discharging the reaction interface from the outlet of the dehydration and purification device.
As a limitation of the present invention, the liquid-liquid two-phase extraction process is a mass transfer process of water passing through a hollow semi-permeable membrane; when the oil-water mixed liquid flows in the channel, water in the oil-water mixed liquid enters the absorption liquid through the hollow semi-permeable membrane.
The invention also discloses a gear lubricating oil dehydration and purification device, which comprises a filter, a dehydration device and a wind-driven gear box which are sequentially connected, wherein the dehydration device is the dehydration and purification device of any one of claims 1 to 6;
the filter is communicated with an oil outlet of the wind power gear box through an oil pump and an oil pipe;
the inlet of the dehydration purification device is communicated with the filtering device, and the outlet of the dehydration purification device is communicated with the oil inlet of the wind power gear box.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the semi-permeable membrane adopted by the invention is a tubular membrane, so that the lubricating oil can be ensured not to contact with an absorption liquid in the extraction and absorption process, and the phenomenon of secondary pollution of the lubricating oil in the water removal process is further avoided by using diethanolamine, triethanolamine, diethylene glycol and triethylene glycol as hydrophilic solutions.
(2) The semi-permeable membrane is a membrane with high hydrophilic property, so that water molecules in lubricating oil can permeate the semi-permeable membrane and then diffuse into absorption liquid, and the concentration of the outer surface of the semi-permeable membrane is close to zero due to the high diffusion rate of the water molecules, so that the diffusion driving force of the water molecules is large, and the mass transfer resistance is small. Not only can reduce the pollution of lubricating oil components to the membrane, prolong the cleaning period and reduce the operation cost, but also can improve the dehydration efficiency of the lubricating oil.
(3) The semi-permeable membrane is a membrane with high hydrophilic property, has high selectivity only to water in lubricating oil, does not influence lubricating oil components and components in absorption liquid, and can effectively reduce loss of effective components of the lubricating oil.
(4) The absorption liquid adopted by the invention can be regenerated in a heating mode, does not produce pollutant discharge and has no adverse effect on the environment.
(5) The dehydration purification method adopted by the invention can implement uninterrupted purification treatment on the lubricating oil, realizes the online purification maintenance of the lubricating oil, does not need a complex mechanical structure, and can reduce the purification energy consumption of the lubricating oil.
The invention can be widely applied to the online dehydration, purification and maintenance of large-scale mechanical lubricating liquid, and has good application prospect and economic value.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a hollow semipermeable membrane according to example 1 of the present invention;
in the figure: 1. an oil pump; 2. a filter; 3. a hollow semi-permeable membrane; 4. an absorption liquid; 5. a hollow semi-permeable membrane liquid-liquid contactor; 6. an absorption liquid discharge valve; 7. an absorption liquid replenishing valve; 8. a lube oil return valve; 9. a wind power gear box; 101. a water molecule; 102. an oil molecule.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description of the preferred embodiment is only for purposes of illustration and understanding, and is not intended to limit the invention.
EXAMPLE 1A dehydration purification apparatus
As shown in fig. 1 and 2, the present embodiment comprises a hollow semi-permeable membrane liquid-liquid contactor 5 and a hollow semi-permeable membrane 3 disposed inside the hollow semi-permeable membrane liquid-liquid contactor 5. The hollow semi-permeable membrane 3 is a membrane having a high hydrophilic property, and water molecules 101 in the oil molecules 102 can permeate the hollow semi-permeable membrane 3 and then diffuse into the absorption liquid 4, thereby dehydrating the oil-water mixture.
The hollow semi-permeable membrane 3 is a tubular membrane, and is made of one of a cellulose membrane, a chitosan membrane or a polyvinyl alcohol membrane; the inner side of the hollow semi-permeable membrane 3 is a channel of oil-water mixed liquid, and the outer side is absorption liquid 4; the hollow semi-permeable membrane 3 is entirely immersed in the hydrophilic solution.
The hollow semi-permeable membrane liquid-liquid contactor 5 is a shell which surrounds the absorption liquid 4 and the hollow semi-permeable membrane 3 and is used for containing the absorption liquid 4 and the hollow semi-permeable membrane 3; an absorption liquid supplementing valve 7 is arranged above the left side of the hollow semi-permeable membrane liquid-liquid contactor and used for supplementing absorption liquid; an absorption liquid emptying valve 6 is arranged below the right side of the hollow semi-permeable membrane liquid-liquid contactor and is used for discharging absorption liquid needing to be replaced.
The oil-water mixed liquid is a lubricating oil product containing at least one of emulsified water, free water and dissolved water.
The absorption liquid 4 is at least one of a diethanolamine solution, a triethanolamine solution, a diethylene glycol solution and a triethylene glycol solution.
Embodiment 2 a gear lubricating oil dehydration purifier
As shown in fig. 1 and 2, the present embodiment includes the dehydration purification apparatus according to embodiment 1, and further includes: a filter 2 and a wind-powered gearbox 9.
The filter 2 is communicated with an oil outlet of the wind power gear box 9 through the oil pump 1 and an oil pipe and is used for removing solid-phase particle impurities in the lubricating oil.
The wind power gear box 9 is communicated with the dehydration purification device through an oil pipe, and the oil-water mixed liquid is discharged from the wind power gear box 9 and then enters the filter 2.
EXAMPLE 3A method of dehydration purification
In the present example, as shown in fig. 1 and 2, the gear lubricating oil dehydration purification apparatus described in example 2 was used to dehydrate and purify an oil-water mixture. The method comprises the following steps which are carried out in sequence:
s1, opening a valve 8, and pumping out lubricating oil in a wind power gear box 9 through an oil pump 1;
s2, under the driving of the oil pump 1, the lubricating oil passes through the filter 2 to remove solid-phase impurities such as particles in the lubricating oil so as to avoid polluting a subsequent semi-permeable membrane;
s3, under the driving of the oil pump 1, the lubricating oil continuously passes through a spiral pipe made of a hollow semi-permeable membrane 3, and when the lubricating oil passes through the spiral pipe, moisture in the lubricating oil is transferred to an absorption liquid 4 on the outer side of the pipe through the hollow semi-permeable membrane 3 in a mass mode, so that the water removal process of the lubricating oil is completed;
and S4, after the processes of particle removal and water removal are finished, the lubricating oil can enter the wind power gear box 9 through the valve 8. Therefore, the water removal, purification and regeneration process of the wind power gear lubricating oil is completed.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A dehydration purification device is characterized in that: the device comprises a hollow semi-permeable membrane liquid-liquid contactor and a hollow semi-permeable membrane which is arranged in the hollow semi-permeable membrane liquid-liquid contactor and used for oil-water mixed liquid to pass through;
the inner side of the hollow semi-permeable membrane is a channel of oil-water mixed liquid, and the outer side of the hollow semi-permeable membrane is absorption liquid;
and a cavity for containing absorption liquid is arranged between the outer side of the hollow semi-permeable membrane and the inner wall of the hollow semi-permeable membrane liquid-liquid contactor.
2. The dehydration purification apparatus according to claim 1, wherein: the hollow semi-permeable membrane is a tubular membrane, the inner side of the tubular membrane is a channel of the oil-water mixed liquid, and the outer side of the tubular membrane is the absorption liquid.
3. The dehydration purification apparatus according to claim 1 or 2, wherein: the hollow semi-permeable membrane is one of a cellulose membrane, a chitosan membrane and a polyvinyl alcohol membrane.
4. The dehydration purification apparatus according to claim 1, wherein: the oil-water mixed liquid is a lubricating oil product containing at least one of emulsified water, free water and dissolved water.
5. The dehydration purification apparatus according to claim 1, 2 or 4, wherein: the hydrophilic solution is at least one of a diethanolamine solution, a triethanolamine solution, a diethylene glycol solution and a triethylene glycol solution.
6. The dehydration purification apparatus according to claim 2, wherein: the tubular membrane is a corrugated tube membrane or a spiral tube membrane, and the tubular membrane is completely soaked in the absorption liquid.
7. A method of dehydration purification using the dehydration purification apparatus of any one of claims 1 to 6, characterized in that: the method comprises the steps of introducing oil-water mixed liquid into the inner side of a hollow semi-permeable membrane from an inlet of a dehydration purification device, placing absorption liquid on the outer side of the hollow semi-permeable membrane, forming a reaction interface of liquid-liquid two-phase extraction by utilizing the selective permeability of the hollow semi-permeable membrane, and discharging the reaction interface from an outlet of the dehydration purification device.
8. The method of dehydration purification according to claim 7, characterized by: the liquid-liquid two-phase extraction process is a mass transfer process of water passing through the hollow semi-permeable membrane; when the oil-water mixed liquid flows in the channel, water in the oil-water mixed liquid enters the absorption liquid through the hollow semi-permeable membrane.
9. The utility model provides a gear lubricating oil dehydration purifier, includes filter, dewatering device and the wind-powered electricity generation gear box that connects gradually, its characterized in that: the dehydration device is the dehydration purification device of any one of claims 1 to 6;
the filter is communicated with an oil outlet of the wind power gear box through an oil pump and an oil pipe;
the inlet of the dehydration and purification device is communicated with the filter, and the outlet of the dehydration and purification device is communicated with the oil inlet of the wind power gear box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566537.4A CN113244661A (en) | 2021-05-24 | 2021-05-24 | Dehydration purification device and dehydration purification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110566537.4A CN113244661A (en) | 2021-05-24 | 2021-05-24 | Dehydration purification device and dehydration purification method |
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| CN113244661A true CN113244661A (en) | 2021-08-13 |
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| CN202110566537.4A Pending CN113244661A (en) | 2021-05-24 | 2021-05-24 | Dehydration purification device and dehydration purification method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670657A (en) * | 2021-08-27 | 2021-11-19 | 中建华宸(海南)建设集团有限公司 | Columnar sampler for submarine sediment exploration |
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2021
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| CN207391353U (en) * | 2017-08-18 | 2018-05-22 | 神华集团有限责任公司 | Remove the device of phenolic comp ' ds pollution in oil product |
| US20190126210A1 (en) * | 2017-10-26 | 2019-05-02 | King Fahd University Of Petroleum And Minerals | Membrane for oil-water separation and simultaneous removal of organic pollutants |
| CN210057465U (en) * | 2019-06-14 | 2020-02-14 | 四川轻化工大学 | Oil-water separator and oil recovery device |
| CN110787488A (en) * | 2019-11-27 | 2020-02-14 | 中电智为(北京)科技有限公司 | Vacuum state fiber membrane type oil dewatering treatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670657A (en) * | 2021-08-27 | 2021-11-19 | 中建华宸(海南)建设集团有限公司 | Columnar sampler for submarine sediment exploration |
| CN113670657B (en) * | 2021-08-27 | 2024-04-16 | 中建华宸(海南)建设集团有限公司 | Cylindrical sampler for submarine sediment exploration |
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