CN105727598A - Method and device for separating liquid with different densities based on hydraulic pushing and pressing - Google Patents
Method and device for separating liquid with different densities based on hydraulic pushing and pressing Download PDFInfo
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- CN105727598A CN105727598A CN201610297344.2A CN201610297344A CN105727598A CN 105727598 A CN105727598 A CN 105727598A CN 201610297344 A CN201610297344 A CN 201610297344A CN 105727598 A CN105727598 A CN 105727598A
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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
- B01D17/0208—Separation of non-miscible liquids by sedimentation
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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
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
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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
- B01D17/12—Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
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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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Abstract
The invention discloses a method and a device for separating liquid with different densities based on hydraulic pushing and pressing, belonging to the technical field of sewage separation device. According to the method, mixed liquid containing liquid with different densities is injected into a primary chamber, the mixed liquid enters a separation chamber through a flow guide pipe and is layered in the separation chamber, high-density liquid is discharged by virtue of a discharging pipe with an inlet formed in the lower part of the separation chamber, and low-density liquid is remained at the upper part of the separation chamber; when the inflow volume is 0 or an inflow pipe is closed, the discharging pipe is closed, a flow injection pump in the primary chamber is turned on, the mixed liquid at the bottom of the primary chamber is guided into the separation chamber by virtue of the flow injection pipe to raise the liquid level of the separation chamber, then the low-density liquid flows into a collection vessel located at the upper part of the separation chamber, and when the interface of the high-density liquid approaches to an inlet of the collection vessel, the high-density liquid returns into the primary chamber through the flow guide pipe. The method and the device have the characteristics of high separation efficiency and low cost.
Description
Technical field
The present invention relates to a kind of method based on fluid power push-press separation different densities liquid and device thereof, belong to oily waste water segregation apparatus technical field.
Background technology
Being often accompanied by a number of lubricant component in the sewage such as changing food waste, sewage wastewater, these lubricant components are often difficult to separate after mixing with moisture, and often adhere to the container, are not only difficult to remove, also can bring bad smell after corruption.The existing device that the sewage and waste water containing oils and fats is easily separated, the modes adopting scraper plate or stream hydraulic fluid port more.These modes generally require specific frizing or oil removing parts, add production and the use cost of device on the one hand, and deoiling effect is also not ideal enough on the other hand, and waste oil easily flows out from the boundary having parts or adheres on oil removing parts.Simultaneously as the inflow of wastewater and sewage is not sufficiently stable so that the liquid level in segregation apparatus often occurs that fluctuation, oil or water often mix and causes separation thorough not in respective separation storing apparatus.Meanwhile, stream hydraulic fluid port is fixedly installed often, arranges too high meeting and causes that Residual oil is too high, and most of Residual oils separate and do not go out, thus causing that separation efficiency is low；And flow the too low liquid level of hydraulic fluid port once fluctuate, and waste water easily enters stream hydraulic fluid port, thus again admixed together with the waste oil separated, and then cause that oil-water separation is thorough not.Additionally, existing oily-water seperating equipment to there is also structure excessively complicated, relatively costly, the shortcomings such as energy consumption is bigger.
Summary of the invention
For improving the efficiency of oil-water separation, reducing separation costs and energy consumption, the invention provides a kind of method based on fluid power push-press separation different densities liquid and segregation apparatus, the technical scheme taked is as follows:
It is an object of the present invention to provide a kind of method based on fluid power push-press separation different densities liquid, the method is to be injected in primary chamber by the mixed liquor containing different densities liquid, mixed liquor enters in separation chamber by mozzle, mixed liquor layering in separation chamber, the discharge pipe that high density liquid is positioned at bottom, separation chamber by entrance is discharged, and low density liquid is retained in top, separation chamber；When the influx of primary indoor mixed liquor is zero, close discharge pipe, open the beam pump in primary chamber, by beam pipe, the mixed liquor bottom primary chamber is injected in separation chamber and raises separation chamber's liquid level, when in separation chamber, liquid level collects position higher than low density liquid, low density liquid is flowed into the collection ware being arranged in top, separation chamber；When in separation chamber, fluid pressure is higher than overflow position pressure, high density liquid is flowed back in primary chamber by mozzle flow export；Described low density liquid collects at least high than the height of the overflow position 1mm of height of position.
Preferably, described low density liquid collects position, for being positioned at the horizontal position on the upper edge collecting ware of separation chamber's internal upper part；Described overflow position is the horizontal position on edge on primary chamber Inner guide pipe flow entrance.
The step of described separation method is as follows:
1) being flowed in primary chamber by the mixed liquor being mixed with different densities liquid, when mixed liquor liquid level is higher than mozzle entrance, mixed liquor enters separation chamber's static layering by mozzle；
2) high/low density liquid surface in separation chamber is kept higher than the position of mozzle flow export in separation chamber, along with the inflow of mixed liquor, to make the thickness of low density liquid layer be continuously increased；
3) regularly discharge pipe no liquid is measured either manually or by the photoelectricity liquid level direction finder being positioned at above discharge pipe, the influx being considered as in primary chamber mixed liquor is zero or closes mixed liquor and flow into pipe, turn off discharge pipe, start the photoelectricity liquid level direction finder in beam pump and primary chamber, mixed liquor in primary chamber is imported to by beam pipe in the high density liquid layer in separation chamber, constantly promote the liquid level in separation chamber；
4) when the liquid level in separation chamber is more than collecting the upper along time highly of ware, low density liquid enters to collect ware and be flowed into low density liquid by collecting pipe to be collected in container, when the pressure in separation chamber is more than the pressure on edge on primary chamber Inner guide tube inlet, high density liquid is flowed back in primary chamber by the flow export of separation chamber's Inner guide pipe；
5) when the photoelectricity liquid level location meter in mixed liquor inflow pipe detects the change of inflow intraluminal fluid position, close beam pump, close photoelectricity liquid level direction finder in inflow pipe, open discharge pipe, discharge high density liquid in separation chamber；When primary indoor liquid level exceed on mozzle inflow entrance along time, repeat step 2) to step 4) operation.
The above either method in separating petroleum refining, tank cleaning, cargo tank ballasting washing of tanks, machine cut processing, carwash, food and drink and food processing process the application in the separation process of produced mixed liquor also within protection scope of the present invention.
Another object of the present invention is to provide a kind of device implementing described separation method, this device includes primary chamber 1, separation chamber 2, the mozzle 4 of connection primary chamber 1 and separation chamber 2, the inflow pipe 3 connected with primary chamber 1, the discharge pipe 5 connected with separation chamber 2, the beam pump 6 that is positioned at bottom primary chamber 1 and connected with separation chamber 2 or mozzle 4 by beam pipe 10 and be fixedly mounted on top, separation chamber 2 the collection ware 7 connected with collecting pipe 11, wherein, collect the inflow liquid level of ware 7 more than mozzle 4 inflow entrance height in primary chamber 1, mozzle 4 in primary chamber 1 height of inflow entrance more than the height of discharge pipe 5 outlet.
Preferably, the position of the described mozzle 4 flow export in separation chamber 2 is lower than the position of discharge pipe 5, and the position of mozzle 4 inflow entrance is higher than the position of flow export.
Preferably, the orifices that described beam pipe 10 connects in separation chamber or with mozzle 4 is lower than the position of mozzle 4 inflow entrance.
Preferably, the diameter of described beam pipe 10 is less than the 1/4 of mozzle 4 diameter.
Preferably, it is arranged over the first photoelectricity liquid level direction finder 12 and discharge pipe switching device in the outlet of discharge pipe 5；It is provided with the second photoelectricity liquid level direction finder 13 in inflow pipe 3 before entering initial room 1.
Preferably, described device still has control chamber, first photoelectricity liquid level direction finder 12 and discharge pipe switching device, the second photoelectricity liquid level direction finder 13 and beam pump 6 are all connected with control chamber, carrying out Artificial Control by the button on control chamber or automatically controlled by the computer in control chamber.
Preferably, the quantity of described separation chamber 2 can be multiple, is connected by mozzle 4 and beam pipe 10 in parallel.
Preferably, described beam pump 6 works under nominal power, the liquid volume in injection separator box per second less than liquid level arrive overflow position time separator box in liquid volume 1/80th.
When, after two reservoir that specification is identical, one loads high density liquid, and another loads high/low density mixing liquid.After stable layering, two containers there will be difference in height.Low-density solution ratio difference in mixed liquor can cause that the thickness of low density liquid layer is different, but, higher than single high density liquid liquid level layer with will not change lower than the ratio of single high density liquid liquid level layer.By utilizing this difference in height, can the creationary position that the position collecting liquid is positioned above overflow.Set-up mode by this anti-convention, it is possible to save scraper plate etc. and collect the device of low density liquid, only by adjusting the height of liquid level, the separation of high/low density liquid can be realized.
The beneficial effect that the present invention obtains:
Method provided by the present invention has simple to operate, separation efficiency high, only need to by the control of liquid level just being realized the high efficiency separation of different densities liquid, the requirement of experimental provision is low, the separation of different densities liquid need not be can be realized as by the fat separator device that scraper plate, grid section etc. are concrete, and can avoid low density liquid does not contain high density liquid.The present invention adopts low power beam pump can prevent big flow from causing liquid level big ups and downs, and the little energy consumption of power is low simultaneously.Meanwhile, stream hydraulic fluid port is unrestricted, the viscosity of liquid body will not cause stream hydraulic fluid port blocking.
Additionally, device provided by the present invention has simple in construction, cost is low, and separation efficiency is high and is easy to the feature keeped in repair, it is possible to is greatly improved the separating effect of sewage and waste water, reduces the cost separated.
Accompanying drawing explanation
Fig. 1 be apparatus of the present invention face structural representation.
Schematic diagram when Fig. 2 is that in apparatus of the present invention separation chamber, liquid level promotes.
Fig. 3 is the plan structure signal of apparatus of the present invention.
In figure, 1, primary chamber；2, separation chamber；3, flow into pipe；4, mozzle；5, discharge pipe；6, beam pump；7, collect ware；8, low density liquid；9, high density liquid；10, beam pipe；11, collecting pipe, the 12, first photoelectricity liquid level direction finder；13, the second photoelectricity liquid level direction finder；14, flow into pipe switching device.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, method and apparatus provided by the present invention is described further, but the present invention is not by the restriction of following example and detailed description.
Fig. 1 be in a kind of preferred version of the present invention segregation apparatus face structural representation.Schematic diagram when Fig. 2 is that in apparatus of the present invention separation chamber, liquid level promotes.Fig. 3 is the plan structure signal of apparatus of the present invention.From Fig. 1-3 it can be seen that this device is mainly by primary chamber 1, separation chamber 2, flowing into pipe 3, mozzle 4, discharge pipe 5, beam pump 6, collect ware 7, beam pipe 10, collecting pipe 11 forms, and the first liquid level direction finder 12 and the second liquid level direction finder 13 form.Wherein, beam pump 6 is positioned at primary chamber 1, is connected with separation chamber 2 by beam pipe 10.Mozzle 4 connects primary chamber 1 and separation chamber 2.The inflow entrance of mozzle 4 is positioned at primary chamber 1, and flow export is positioned at separation chamber 2, and the position of inflow entrance is higher than the position of flow export.Water inlet pipe 3 connects with primary chamber 1, is positioned at the top of primary chamber 1.Discharge pipe 5 connects with separation chamber 2.Wherein, the inlet port of discharge pipe 5 is positioned at the bottom of separation chamber 2, and flow export is positioned at the top of separation chamber 2.Additionally, beam pipe 10 can not also be communicates directly in separation chamber 2, but it is communicated on mozzle 4, carries out beam by mozzle 4.The quantity of separation chamber 2 can be that two or more modes in parallel are connected by mozzle 4 and beam pipe 10.
Top in separation chamber 2 is fixed with a collection ware 7.Collecting ware 7 is truncated cone-shaped, and the area of upper surface is more than the area of lower surface, and upper surface opens wide and parallel with liquid level in separation chamber 2.Collecting pipe 11, the coated lycopene of collecting pipe 11 and low density liquid it is connected to, in order to reclaim low density liquid in the bottom collecting ware 7.In whole device, the inflow entrance position of mozzle 4 is lower than the position collecting ware 7 upper surface, and during to ensure liquid level lifting in separation chamber 2, high density liquid can be returned in primary chamber 1 by mozzle 4.The position of the position and mozzle 4 inflow entrance of simultaneously collecting ware 7 upper surface is above the position of discharge pipe 5 flow export, thus without by powered attendant-controlled wheelchairs situation, high density liquid can flow out from separation chamber 2, and liquid is not when closing discharge pipe 5 and promoting liquid level in separation chamber 2, thus preventing high density liquid from flowing back in primary chamber 1.In separation chamber 2, the flow export position of mozzle 4 is lower than the position of discharge pipe 5 flow export, it is simultaneously above the position of beam pipe 10, the position of beam pipe 10 flow export during liquid level in control separation chamber is made to be under high/low density solution interface all the time, to avoid confusing upper strata low density liquid when beam pump 6 injects liquid.
Whether the port of export at discharge pipe 5 is provided with the first liquid level direction finder 12 for measuring the liquid level in discharge pipe 5, have liquid to flow out to determine in discharge pipe 5.Meanwhile, discharge pipe switching device it is also equipped with, in order to not having water outlet to close discharge pipe 5, open discharge pipe 5 when having into water.And pipe 3 is installed with the second liquid level direction finder 13 flowing into and flows into pipe switching device, it is used for measuring the liquid level flowed in pipe, in order to coordinate the turnover controlling liquid with the first liquid level direction finder 12 and discharge pipe switching device.
Beam pump 6 used is small-power beam pump, work under nominal power, when importing to the liquid volume in separation chamber 2 each second less than separation chamber 2 liquid level to overflow position less than 1st/80th of volume, to avoid, flow is excessive causes stirring to the liquid in separation chamber 2, affects separating effect.
In order to detect feasibility and the effect of preparation facilities, inventor utilizes the device prepared by the present invention and existing scraper-type segregation apparatus that the oil water mixture in identical source has been separated, scraper-type segregation apparatus carries out according to the operating instruction of this device, and the step utilizing apparatus of the present invention is as follows:
1) being flowed in primary chamber by the mixed liquor being mixed with different densities liquid, when mixed liquor liquid level is higher than mozzle entrance, mixed liquor enters separation chamber's static layering by mozzle；
2) high/low density liquid surface in separation chamber is kept higher than the position of mozzle flow export in separation chamber, along with the inflow of mixed liquor, to make the thickness of low density liquid layer be continuously increased；
3) discharge pipe no liquid is measured by the photoelectricity liquid level direction finder being positioned at above discharge pipe, the influx being considered as in primary chamber mixed liquor be zero (or manually directly close flow into pipe switching device 14), turn off discharge pipe, start the photoelectricity liquid level direction finder in beam pump and primary chamber, mixed liquor in primary chamber is imported to by beam pipe in the high density liquid layer in separation chamber, constantly promote the liquid level in separation chamber；
4) when the liquid level in separation chamber is more than collecting the upper along time highly of ware, low density liquid enters to collect ware and be flowed into low density liquid by collecting pipe to be collected in container, when the pressure in separation chamber is more than the pressure on edge on primary chamber Inner guide tube inlet, high density liquid is flowed back in primary chamber by the flow export of separation chamber's Inner guide pipe；
5) when the photoelectricity liquid level location meter in mixed liquor inflow pipe detects inflow intraluminal fluid position rising (or decline), closing beam pump, closedown flows into photoelectricity liquid level direction finder in managing, and opens discharge pipe, high density liquid in discharge separation chamber；When primary indoor liquid level exceed on mozzle inflow entrance along time, repeat step 2) to step 4) operation.
After separation, to separating obtained low density liquid, namely oils and fats has detected.Discovery utilizes assembly of the invention, it does not have do not have mix moisture in the oils and fats separated, and remains a small amount of Residual oil in separator box.But this Residual oil preferentially can be separated in the next oil extraction cycle, will not retain long-time in separator box.And scraper-type segregation apparatus separates residual fraction moisture in the oil obtained, and remaining part oil in the waste water separated, separating effect is not ideal enough.
Although the present invention is with preferred embodiment openly as above; but it is not limited to the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; can doing various change and modification, therefore protection scope of the present invention should with being as the criterion that claims define.
Claims (10)
1. the method based on fluid power push-press separation different densities liquid, it is characterized in that, mixed liquor containing different densities liquid is injected in primary chamber, mixed liquor enters in separation chamber by mozzle, mixed liquor layering in separation chamber, the discharge pipe that high density liquid is positioned at bottom, separation chamber by entrance is discharged, and low density liquid is retained in top, separation chamber；When the influx of primary indoor mixed liquor is zero or close mixed liquor and flow into pipe, turn off discharge pipe, open the beam pump in primary chamber, by beam pipe, the mixed liquor bottom primary chamber is injected in separation chamber and raises separation chamber's liquid level, when in separation chamber, liquid level collects position higher than low density liquid, low density liquid is flowed into the collection ware being arranged in top, separation chamber；When in separation chamber, fluid pressure is higher than overflow position pressure, high density liquid is flowed back in primary chamber by mozzle flow export；Described low density liquid collects at least high than the height of the overflow position 1mm of height of position.
2. separation method according to claim 1, it is characterised in that described low density liquid collects position, for being positioned at the horizontal position on the upper edge collecting ware of separation chamber's internal upper part；Described overflow position is the horizontal position on edge on primary chamber Inner guide pipe flow entrance.
3. separation method according to claim 1, it is characterised in that step is as follows:
1) being flowed in primary chamber by the mixed liquor being mixed with different densities liquid, when mixed liquor liquid level is higher than mozzle entrance, mixed liquor enters separation chamber's static layering by mozzle；
2) high/low density liquid surface in separation chamber is kept higher than the position of mozzle flow export in separation chamber, along with the inflow of mixed liquor, to make the thickness of low density liquid layer be continuously increased；
3) regularly discharge pipe no liquid is measured either manually or by the photoelectricity liquid level direction finder being positioned at above discharge pipe, the influx being considered as in primary chamber mixed liquor is zero or closes mixed liquor and flow into pipe, turn off discharge pipe, start the photoelectricity liquid level direction finder in beam pump and primary chamber, mixed liquor in primary chamber is imported to by beam pipe in the high density liquid layer in separation chamber, constantly promote the liquid level in separation chamber；
4) when the liquid level in separation chamber is more than collecting the upper along time highly of ware, low density liquid enters to collect ware and be flowed into low density liquid by collecting pipe to be collected in container, when the pressure in separation chamber is more than the pressure on edge on primary chamber Inner guide tube inlet, high density liquid is flowed back in primary chamber by the flow export of separation chamber's Inner guide pipe；
5) when the photoelectricity liquid level location meter in mixed liquor inflow pipe detects the change of inflow intraluminal fluid position, close beam pump, close photoelectricity liquid level direction finder in inflow pipe, open discharge pipe, discharge high density liquid in separation chamber；When primary indoor liquid level exceed on mozzle inflow entrance along time, repeat step 2) to step 4) operation.
4. the application in the separation process of produced mixed liquor in separating petroleum refining, tank cleaning, cargo tank ballasting washing of tanks, machine cut processing, carwash, food and drink and food processing process of either method described in claim 1-3.
5. the device implementing separation method described in claim 1, it is characterized in that, including primary chamber (1), separation chamber (2), the mozzle (4) of connection primary chamber (1) and separation chamber (2), the inflow pipe (3) connected with primary chamber (1), the discharge pipe (5) connected with separation chamber (2), it is positioned at primary chamber (1) bottom and passes through the beam pump (6) that connects with separation chamber (2) or mozzle (4) of beam pipe (10) and be fixedly mounted on (2) top, separation chamber the collection ware (7) connected with collecting pipe (11), wherein, collect the inflow liquid level of ware (7) more than mozzle (4) inflow entrance height in primary chamber (1), mozzle (4) in primary chamber (1) height of inflow entrance more than the height of discharge pipe (5) outlet.
6. device according to claim 5, it is characterized in that, the position of the described mozzle (4) flow export in separation chamber (2) is lower than the position of discharge pipe (5), and the position of mozzle (4) inflow entrance is higher than the position of flow export.
7. device according to claim 5, it is characterised in that the orifices that described beam pipe (10) connects in separation chamber or with mozzle (4) is lower than the position of mozzle (4) inflow entrance.
8. device according to claim 5, it is characterised in that the diameter of described beam pipe (10) is less than the 1/4 of mozzle (4) diameter.
9. device according to claim 5, it is characterised in that the outlet at discharge pipe (5) is arranged over the first photoelectricity liquid level direction finder (12) and discharge pipe switching device；It is provided with the second photoelectricity liquid level direction finder (13) entering in the inflow pipe (3) that initial room (1) is front.
10. device according to claim 5, it is characterised in that described beam pump (6) works under nominal power, the liquid volume in injection separator box per second less than liquid level arrive overflow position time separator box in liquid volume 1/80th.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297344.2A CN105727598B (en) | 2016-05-06 | 2016-05-06 | A kind of method and its device based on fluid power push-press separation different densities liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610297344.2A CN105727598B (en) | 2016-05-06 | 2016-05-06 | A kind of method and its device based on fluid power push-press separation different densities liquid |
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| CN105727598A true CN105727598A (en) | 2016-07-06 |
| CN105727598B CN105727598B (en) | 2017-12-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871005A (en) * | 2020-07-14 | 2020-11-03 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN114231748A (en) * | 2021-12-14 | 2022-03-25 | 中国航发南方工业有限公司 | Recovery method, device and application of low-melting-point alloy |
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| JP2015167935A (en) * | 2014-03-10 | 2015-09-28 | ウィズ・ラボ有限会社 | Sub tank type water-oil separation and automatic recovery system |
| CN105415087A (en) * | 2016-01-11 | 2016-03-23 | 苏州帝瀚环保科技股份有限公司 | Machine tool liquid tank purification system |
| CN205182256U (en) * | 2015-11-24 | 2016-04-27 | 山西江淮重工有限责任公司 | Cutting fluid oil film remove device |
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| CN1387933A (en) * | 2001-05-25 | 2003-01-01 | 冠荣科技股份有限公司 | Counter-current oil-water separator |
| US20040118774A1 (en) * | 2002-12-13 | 2004-06-24 | Steven Davidian | Liquid reconditioning system including a venturi pump |
| JP2015167935A (en) * | 2014-03-10 | 2015-09-28 | ウィズ・ラボ有限会社 | Sub tank type water-oil separation and automatic recovery system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871005A (en) * | 2020-07-14 | 2020-11-03 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN111871005B (en) * | 2020-07-14 | 2022-03-01 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN114231748A (en) * | 2021-12-14 | 2022-03-25 | 中国航发南方工业有限公司 | Recovery method, device and application of low-melting-point alloy |
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| CN105727598B (en) | 2017-12-15 |
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