CA1223552A - Installation and process for separating the constituents of a suspension - Google Patents
Installation and process for separating the constituents of a suspensionInfo
- Publication number
- CA1223552A CA1223552A CA000440307A CA440307A CA1223552A CA 1223552 A CA1223552 A CA 1223552A CA 000440307 A CA000440307 A CA 000440307A CA 440307 A CA440307 A CA 440307A CA 1223552 A CA1223552 A CA 1223552A
- Authority
- CA
- Canada
- Prior art keywords
- suspension
- filter
- envelope
- outlet
- installation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Cyclones (AREA)
- Extraction Or Liquid Replacement (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Abstract:
The present invention relates to an installation for separating the constituents of a suspension such as sludges in hydrocarbon storage tanks. The installation includes a centrifugal separator and a self-cleaning filter located upstream of the separator. The filter includes an envelope having an inlet for the suspension and an outlet for sediments. A filter surface is provided which is connected to the inner surface of the envelope so as to form a chamber with the envelope for the filtrate.
The envelope is provided with an outlet communicating with the chamber for the filtrate. A brush unit is provided in rotating contact with the filter for continuously cleaning the surface of the filter. A heater is connected in a line connecting the filtrate outlet of the filter with the separator. The filter, heater and separator are mounted on a vehicle. A boiler is mounted on a separate vehicle and generates steam which is fed to the heater.
The present invention relates to an installation for separating the constituents of a suspension such as sludges in hydrocarbon storage tanks. The installation includes a centrifugal separator and a self-cleaning filter located upstream of the separator. The filter includes an envelope having an inlet for the suspension and an outlet for sediments. A filter surface is provided which is connected to the inner surface of the envelope so as to form a chamber with the envelope for the filtrate.
The envelope is provided with an outlet communicating with the chamber for the filtrate. A brush unit is provided in rotating contact with the filter for continuously cleaning the surface of the filter. A heater is connected in a line connecting the filtrate outlet of the filter with the separator. The filter, heater and separator are mounted on a vehicle. A boiler is mounted on a separate vehicle and generates steam which is fed to the heater.
Description
~2355~Z
Installation and process for separating the constituents of a suspension The present invention relates to installations and processes for separating the constituents of a suspension containing solids, some of which are denser and others of which are less dense than one of the liquid constituents of the suspension. The invention applies very particularly to the recovery of the constituents of sludges in vats, in particular sludges in hydrocarbon storage tanks.
Centrifugal separators are known which are capable of continuously separating one or two immiscible liquid phases with continuous discharge of a solid phase.
These centrifugal separators, produced by the Applicant Company under the name of DCS type bowls, essentially comprise a rotating bowl and an internal conveyor rotating at a differential speed relative to the bowl of the machine. The conveyor makes it possible firstly to raise the sediments continuously up to ejection orifices while preventing any accumulation of solids in the bowl, and secondly to unclog the ejection nozzles, which limits the likelihood of a blockage.
It has been shown that suspensions which are difficult to separate can be separated into their solid and liquid constituents using these centrifugal separators.
These separators are based on the centrifugation principle, 35S~
whereby the constituents are separated according to their specific gravity or density. The design of these centric frugal separators supposes that the solid constituents are denser than the liquid constituents to be separated off.
S However, if the suspension contains solids which are less dense than the liquid constituents, as is the case, in particular, of sludges in storage -tanks for petroleum products, the centrifugal separator cannot be used without risking serious operating problems.
The invention overcomes this disadvantage by associating with the centrifugal separator a filter of the particular type which is capable not only of removing a large part of the solids, irrespective of their specific gravity, and hence of relieving the centrifugal separator of a corresponding burden, but especially of separating off the solids which are less dense than the liquid constituents of the suspension, so that the filtrate from the filter can safely be sent directly to the centrifugal separator.
In accordance with an aspect of the invention there is provided installation for separating the constituents of a suspension, in particular sludges in hydrocarbon storage tanks, comprising a centrifugal separator and upstream of the centrifugal separator a self-cleaning filter with an envelope having an inlet for the suspension and an outlet for the sediments, a filtering surface delimiting with the inner wall of the envelope a chamber for the filtrate which is provided with an outlet for the filtrate, and brush means which are caused to rotate relative to the axis of the filtering surface, wherein the installation is mounted on a vehicle and an intermediate heater is inserted between the self-cleaning filter and the centrifugal separator and there is provided a boiler for feeding the heater with steam mounted on a separate vehicle.
In this self-cleaning filter, the envelope of ~35~
which is generally essentially a body of revolution having a vertical axis, with an outlet for the sediments provided at the bottom of the envelope, the very dense solids present in the suspension brought to the top of the envelope fall gradually into the envelope until they form a solid plug in front of the outlet for the sediments. The solids which are less dense than the liquid constituents of the suspension tend to clog the filtering surface, but are unclogged by the unclogging means, which include, in particular, brushes which are caused to rotate relative to the axis of the filtering surface, which is coaxial with the envelope. These solid products which are less dense than the liquid constituents of the suspension thus also comes into the plug, which is discharged from time to time through the outlet for the sediments.
An intermediate heater is inserted between the self-cleaning filter and the centrifugal separator so as to heat the products entering the centrifugal separator and to assist the operation of the latter.
Preferably, the whole of this installation is mounted on a vehicle which can therefore be brought in front of each storage tank to be cleaned, it being possible to reject the sediments and the water directly and to recover the petroleum products, these being the only con-stituents which will have to be transported. The boiler for feeding the heater with steam is advantageously mounted on a separate vehicle, it being possible for the boiler to be used for feeding other installations as well, and, in particular, a primary separator with a heater, also mounted on a separate vehicle and connected directly to the storage tank. To clean the storage tank, hot water is sent to the bottom, it being possible for the hot water to come from the boiler, so as to make the solid sludges present at the bottom of the tank capable of being pumped. A pump is then used to pump them into the separator, or they are 35S~
heated with steam coming from the boiler so as to be able to carry out a first separation of the organic products and the water, and the organic products, still containing large amounts of water and solid products, which may be inorganic, are then sent to the self-cleaning filter via pumps and, preferably, a buffer tank.
In the attached drawings, which are given solely by way of example:
Figure 1 is a diagram of an installation according to the invention, Figure 2 is a diagram of the self-cleaning filter of the installation, and Figure 3 is a diagram of the centrifugal separator of the installation according to the invention.
The installation shown in Figure 1 is connected to a storage tank R for petroleum products. The install-lion comprises a first vehicle 1 carrying a hot water and steam generator, or boiler, 2 with an electricity generating unit 3. This generator 2 can be connected by a line 4 to an inlet of the storage tank R, which comes out at the bottom of the latter into the sludges. A line 5, with a valve 6 and a pump 7, leaves the bottom of the storage tank R and comes out half-way up a preliminary separating vat or tank 8 carried by a vehicle 9. The tank 8 is heated by a steam circuit 10 coming from the generator 2. The bottom of the tank 8 has an outlet 11 for water. A line 12, with a pump 13, leaves the tank 8 near the top and comes out, via a flexible line 14, into a buffer tank 15 carried by a third vehicle 16. This vehicle also carries the remainder of the installation. A line 17, with a pump 18, leaves the bottom of the buffer tank 15 and communicates with the inlet for the suspension of a self-cleaning filter 19. The outlet for the sediments of the self-cleaning filter 19 communicates, via a line 20, with a line 21 for rejecting the sediments. The outlet for ~3SS~
the filtrate of the self-cleaning filter 19 communicates with a line 22, which feeds an intermediate heater 23 heated by a steam circuit aye coming from the generator 2.
The heater 23 communicates via a line 24 with a centrifugal separator 25 having an outlet for the sediments, which communicates with a line 26 joining the line 21, an outlet for the densest liquid constituent, which communicates with a line 27, and an outlet for the less dense liquid constituent, which communicates with a line 29 provided with a pump 30.
Figure 2 is a more detailed diagram of the self-cleaning filter 19. In essence, this filter comprises an envelope 31 which is substantially a body of revolution about a vertical axis, and the bottom of which assumes the shape of a funnel 32 with an outlet 33 for the sediments.
The envelope is provided at the top with an inlet 34 for the suspension to be filtered. An annular filtering sun-face 35 is fixed along the inner cylindrical wall of the envelope 31, delimiting, with the latter, a closed annular chamber 36 for the filtrate. The chamber 36 is provided with an outlet 37 passing through the envelope 31. The shaft 38 of a gear motor 39 runs along the vertical axis of the filter and carries a set of brushes inclined to the horizontal. These brushes are caused to rotate and rub against the filtering surface 35 to unclog it.
This self-cleaning filter operates as follows:
The suspension enters through the inlet 34. The densest solid constituents gradually fall of their own accord, under gravity, to the bottom and collect in the funnel 32 in front of the outlet 33, since they cannot pass through the filtering surface 35. The least dense solid constituents are carried towards the filtering surface 35 and would tend to remain there and clog it if they were not pushed downwards by the brushes 40, with the result that they also agglomerate at the plug of solids which gradually forms in front of the outlet 33. The ~3S5~
liquid constituents, together with very fine solid con-stituents, for example those having a particle size of less than 400 microns, pass through the filtering surface 35, arrive in the chamber 36 for the filtrate and leave through the outlet 37. From time to time, the outlet 33 is opened in order to release the agglomerate of solids which accumulate in the funnel 32. This filter is thus capable of operating continuously, since it is self-cleaning and has the noteworthy characteristic that, desk pile operating continuously, it also removes the solid constituents of the suspension which are less dens than the liquid constituents thereof.
Figure 3 is a diagram of the centrifugal separator 25. This separator, which operates continuously, includes a central inlet 41 for the suspension entering a bowl 42 rotating at a different speed from that of an internal conveyor 43 located at the periphery of the bowl, near the envelope 45 of the whole of the centrifugal separator.
Under the effect of the centrifugal force, the densest solid fines are immediately thrown onto the conveyor 43 and leave through ejection orifices 46, while the two liquid constituents to be separated separate in the stack of inclined plates inside the bowl, according to their specific gravity, an outlet 47 being provided for the densest liquid phase, which is rejected at the periphery and which pushes inwards the less dense liquid constituent, for which an outlet 48 is provided.
The installation operates as follows:
Hot water is sent through the line 4 into the bottom of the storage tanks for petroleum products. This hot water brings the sludges into suspension so as to lower the viscosity of the whole sufficiently for it to be pumped by the pump 7 into the separating vat 8. In the vat, the suspension of sludges and hot water is heated by steam coming from the generator 2 and brought by the line 10, ~2~355~
so as to assist the separation. Water is rejected through the line 12 while the remainder of the suspension, which still contains water, hydrocarbon products and solid semi-mints, both those which are less dense and those which are denser than the liquid constituents, is sent to the buffer tank 15 via the pump 13 and the line 14. From the buffer tank 15, the suspension is sent into the self-cleaning filter 19 via the pump 18 and the line 17. The greater part of the solid products, and especially those which are less dense than the liquid constituents of the suspension, are discharged to the outside via the line 20 and the line 21, while the liquid constituents and the very fine solid products pass into the intermediate heater 23, which heats them so as to assist the action of the centrifugal swooper-ion 25, to which the suspension is brought via the line connected to the feed 41 of the separator. The solid con-stituents are separated off in the separator and leave via the orifices 46, which communicate with the line 26 leading to the line 21. The water, which is denser than the petroleum products, leaves through the outlet 41, which communicates with the line 27, and, if appropriate, can be returned to the hot water and steam generator 2. The out-let 48 is connected to the line 29, through which valuable petroleum products are recovered.
The installation can operate continuously, can be mowed so as to be brought up to a vat to be cleaned, and makes it possible to transport only the petroleum product recovered, without having to wait for this product to be separated from the water in separating vats.
Installation and process for separating the constituents of a suspension The present invention relates to installations and processes for separating the constituents of a suspension containing solids, some of which are denser and others of which are less dense than one of the liquid constituents of the suspension. The invention applies very particularly to the recovery of the constituents of sludges in vats, in particular sludges in hydrocarbon storage tanks.
Centrifugal separators are known which are capable of continuously separating one or two immiscible liquid phases with continuous discharge of a solid phase.
These centrifugal separators, produced by the Applicant Company under the name of DCS type bowls, essentially comprise a rotating bowl and an internal conveyor rotating at a differential speed relative to the bowl of the machine. The conveyor makes it possible firstly to raise the sediments continuously up to ejection orifices while preventing any accumulation of solids in the bowl, and secondly to unclog the ejection nozzles, which limits the likelihood of a blockage.
It has been shown that suspensions which are difficult to separate can be separated into their solid and liquid constituents using these centrifugal separators.
These separators are based on the centrifugation principle, 35S~
whereby the constituents are separated according to their specific gravity or density. The design of these centric frugal separators supposes that the solid constituents are denser than the liquid constituents to be separated off.
S However, if the suspension contains solids which are less dense than the liquid constituents, as is the case, in particular, of sludges in storage -tanks for petroleum products, the centrifugal separator cannot be used without risking serious operating problems.
The invention overcomes this disadvantage by associating with the centrifugal separator a filter of the particular type which is capable not only of removing a large part of the solids, irrespective of their specific gravity, and hence of relieving the centrifugal separator of a corresponding burden, but especially of separating off the solids which are less dense than the liquid constituents of the suspension, so that the filtrate from the filter can safely be sent directly to the centrifugal separator.
In accordance with an aspect of the invention there is provided installation for separating the constituents of a suspension, in particular sludges in hydrocarbon storage tanks, comprising a centrifugal separator and upstream of the centrifugal separator a self-cleaning filter with an envelope having an inlet for the suspension and an outlet for the sediments, a filtering surface delimiting with the inner wall of the envelope a chamber for the filtrate which is provided with an outlet for the filtrate, and brush means which are caused to rotate relative to the axis of the filtering surface, wherein the installation is mounted on a vehicle and an intermediate heater is inserted between the self-cleaning filter and the centrifugal separator and there is provided a boiler for feeding the heater with steam mounted on a separate vehicle.
In this self-cleaning filter, the envelope of ~35~
which is generally essentially a body of revolution having a vertical axis, with an outlet for the sediments provided at the bottom of the envelope, the very dense solids present in the suspension brought to the top of the envelope fall gradually into the envelope until they form a solid plug in front of the outlet for the sediments. The solids which are less dense than the liquid constituents of the suspension tend to clog the filtering surface, but are unclogged by the unclogging means, which include, in particular, brushes which are caused to rotate relative to the axis of the filtering surface, which is coaxial with the envelope. These solid products which are less dense than the liquid constituents of the suspension thus also comes into the plug, which is discharged from time to time through the outlet for the sediments.
An intermediate heater is inserted between the self-cleaning filter and the centrifugal separator so as to heat the products entering the centrifugal separator and to assist the operation of the latter.
Preferably, the whole of this installation is mounted on a vehicle which can therefore be brought in front of each storage tank to be cleaned, it being possible to reject the sediments and the water directly and to recover the petroleum products, these being the only con-stituents which will have to be transported. The boiler for feeding the heater with steam is advantageously mounted on a separate vehicle, it being possible for the boiler to be used for feeding other installations as well, and, in particular, a primary separator with a heater, also mounted on a separate vehicle and connected directly to the storage tank. To clean the storage tank, hot water is sent to the bottom, it being possible for the hot water to come from the boiler, so as to make the solid sludges present at the bottom of the tank capable of being pumped. A pump is then used to pump them into the separator, or they are 35S~
heated with steam coming from the boiler so as to be able to carry out a first separation of the organic products and the water, and the organic products, still containing large amounts of water and solid products, which may be inorganic, are then sent to the self-cleaning filter via pumps and, preferably, a buffer tank.
In the attached drawings, which are given solely by way of example:
Figure 1 is a diagram of an installation according to the invention, Figure 2 is a diagram of the self-cleaning filter of the installation, and Figure 3 is a diagram of the centrifugal separator of the installation according to the invention.
The installation shown in Figure 1 is connected to a storage tank R for petroleum products. The install-lion comprises a first vehicle 1 carrying a hot water and steam generator, or boiler, 2 with an electricity generating unit 3. This generator 2 can be connected by a line 4 to an inlet of the storage tank R, which comes out at the bottom of the latter into the sludges. A line 5, with a valve 6 and a pump 7, leaves the bottom of the storage tank R and comes out half-way up a preliminary separating vat or tank 8 carried by a vehicle 9. The tank 8 is heated by a steam circuit 10 coming from the generator 2. The bottom of the tank 8 has an outlet 11 for water. A line 12, with a pump 13, leaves the tank 8 near the top and comes out, via a flexible line 14, into a buffer tank 15 carried by a third vehicle 16. This vehicle also carries the remainder of the installation. A line 17, with a pump 18, leaves the bottom of the buffer tank 15 and communicates with the inlet for the suspension of a self-cleaning filter 19. The outlet for the sediments of the self-cleaning filter 19 communicates, via a line 20, with a line 21 for rejecting the sediments. The outlet for ~3SS~
the filtrate of the self-cleaning filter 19 communicates with a line 22, which feeds an intermediate heater 23 heated by a steam circuit aye coming from the generator 2.
The heater 23 communicates via a line 24 with a centrifugal separator 25 having an outlet for the sediments, which communicates with a line 26 joining the line 21, an outlet for the densest liquid constituent, which communicates with a line 27, and an outlet for the less dense liquid constituent, which communicates with a line 29 provided with a pump 30.
Figure 2 is a more detailed diagram of the self-cleaning filter 19. In essence, this filter comprises an envelope 31 which is substantially a body of revolution about a vertical axis, and the bottom of which assumes the shape of a funnel 32 with an outlet 33 for the sediments.
The envelope is provided at the top with an inlet 34 for the suspension to be filtered. An annular filtering sun-face 35 is fixed along the inner cylindrical wall of the envelope 31, delimiting, with the latter, a closed annular chamber 36 for the filtrate. The chamber 36 is provided with an outlet 37 passing through the envelope 31. The shaft 38 of a gear motor 39 runs along the vertical axis of the filter and carries a set of brushes inclined to the horizontal. These brushes are caused to rotate and rub against the filtering surface 35 to unclog it.
This self-cleaning filter operates as follows:
The suspension enters through the inlet 34. The densest solid constituents gradually fall of their own accord, under gravity, to the bottom and collect in the funnel 32 in front of the outlet 33, since they cannot pass through the filtering surface 35. The least dense solid constituents are carried towards the filtering surface 35 and would tend to remain there and clog it if they were not pushed downwards by the brushes 40, with the result that they also agglomerate at the plug of solids which gradually forms in front of the outlet 33. The ~3S5~
liquid constituents, together with very fine solid con-stituents, for example those having a particle size of less than 400 microns, pass through the filtering surface 35, arrive in the chamber 36 for the filtrate and leave through the outlet 37. From time to time, the outlet 33 is opened in order to release the agglomerate of solids which accumulate in the funnel 32. This filter is thus capable of operating continuously, since it is self-cleaning and has the noteworthy characteristic that, desk pile operating continuously, it also removes the solid constituents of the suspension which are less dens than the liquid constituents thereof.
Figure 3 is a diagram of the centrifugal separator 25. This separator, which operates continuously, includes a central inlet 41 for the suspension entering a bowl 42 rotating at a different speed from that of an internal conveyor 43 located at the periphery of the bowl, near the envelope 45 of the whole of the centrifugal separator.
Under the effect of the centrifugal force, the densest solid fines are immediately thrown onto the conveyor 43 and leave through ejection orifices 46, while the two liquid constituents to be separated separate in the stack of inclined plates inside the bowl, according to their specific gravity, an outlet 47 being provided for the densest liquid phase, which is rejected at the periphery and which pushes inwards the less dense liquid constituent, for which an outlet 48 is provided.
The installation operates as follows:
Hot water is sent through the line 4 into the bottom of the storage tanks for petroleum products. This hot water brings the sludges into suspension so as to lower the viscosity of the whole sufficiently for it to be pumped by the pump 7 into the separating vat 8. In the vat, the suspension of sludges and hot water is heated by steam coming from the generator 2 and brought by the line 10, ~2~355~
so as to assist the separation. Water is rejected through the line 12 while the remainder of the suspension, which still contains water, hydrocarbon products and solid semi-mints, both those which are less dense and those which are denser than the liquid constituents, is sent to the buffer tank 15 via the pump 13 and the line 14. From the buffer tank 15, the suspension is sent into the self-cleaning filter 19 via the pump 18 and the line 17. The greater part of the solid products, and especially those which are less dense than the liquid constituents of the suspension, are discharged to the outside via the line 20 and the line 21, while the liquid constituents and the very fine solid products pass into the intermediate heater 23, which heats them so as to assist the action of the centrifugal swooper-ion 25, to which the suspension is brought via the line connected to the feed 41 of the separator. The solid con-stituents are separated off in the separator and leave via the orifices 46, which communicate with the line 26 leading to the line 21. The water, which is denser than the petroleum products, leaves through the outlet 41, which communicates with the line 27, and, if appropriate, can be returned to the hot water and steam generator 2. The out-let 48 is connected to the line 29, through which valuable petroleum products are recovered.
The installation can operate continuously, can be mowed so as to be brought up to a vat to be cleaned, and makes it possible to transport only the petroleum product recovered, without having to wait for this product to be separated from the water in separating vats.
Claims (2)
1. Installation for separating the constituents of a suspension, in particular sludges in hydrocarbon storage tanks, comprising a centrifugal separator and upstream of the centrifugal separator a self-cleaning filter with an envelope having an inlet for the suspension and an outlet for the sediments, a filtering surface delimiting with the inner wall of the envelope a chamber for the filtrate which is provided with an outlet for the filtrate, and brush means which are caused to rotate relative to the axis of the filtering surface, wherein the installation is mounted on a vehicle and an intermediate heater is inserted between the self-cleaning filter and the centrifugal separator and there is provided a boiler for feeding the heater with steam mounted on a separate vehicle.
2. The installation of claim 1, which includes, upstream of the self-cleaning filter, a primary separator with a heater, mounted on a separate vehicle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8218420 | 1982-11-03 | ||
| FR8218420A FR2535223B1 (en) | 1982-11-03 | 1982-11-03 | INSTALLATION AND METHOD FOR SEPARATING THE CONSTITUENTS OF A SUSPENSION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1223552A true CA1223552A (en) | 1987-06-30 |
Family
ID=9278864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000440307A Expired CA1223552A (en) | 1982-11-03 | 1983-11-02 | Installation and process for separating the constituents of a suspension |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0108684B2 (en) |
| JP (1) | JPS59130546A (en) |
| AT (1) | ATE19963T1 (en) |
| CA (1) | CA1223552A (en) |
| DE (1) | DE3363804D1 (en) |
| FR (1) | FR2535223B1 (en) |
| MX (1) | MX170789B (en) |
| NO (1) | NO161542B (en) |
| ZA (1) | ZA838124B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8521629D0 (en) * | 1985-08-30 | 1985-10-23 | Atomic Energy Authority Uk | Contactor |
| FR2597362B1 (en) * | 1986-04-22 | 1991-07-26 | Guinard Oil Services | METHOD AND INSTALLATION FOR SEPARATING THE CONSTITUENTS OF A SUSPENSION. |
| DE4005627A1 (en) * | 1990-02-22 | 1991-08-29 | Henkel Kgaa | TREATMENT SYSTEM FOR COOLING LUBRICANTS |
| EP1220718B1 (en) * | 1999-10-12 | 2007-01-10 | Pneumatic Scale Corporation | Control of separation performance in a centrifuge |
| FR2805256A1 (en) * | 2000-02-17 | 2001-08-24 | Angel Stentz | Used water treatment plant for removing resin residues from impregnation of cast metal components incorporates filter and centrifuge |
| JP6810582B2 (en) * | 2016-11-25 | 2021-01-06 | 川崎重工業株式会社 | Wastewater treatment system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR979348A (en) * | 1948-01-21 | 1951-04-25 | Separator Ab | Process for the separation of a liquid from substances suspended therein by combined filtration and centrifugal separation |
| US3762563A (en) * | 1971-02-23 | 1973-10-02 | P Petersen | Cylindrical rotary strainer |
| US3959140A (en) * | 1973-08-02 | 1976-05-25 | Bertrand Leon Legras | Filter especially intended for filtering natural water for the irrigation of cultivated fields |
| US3956131A (en) * | 1974-03-06 | 1976-05-11 | Foster-Miller Associates, Inc. | System for separation of liquids and solids from a carrier liquid |
| US3954611A (en) * | 1975-01-29 | 1976-05-04 | Reedy Elvie L | Portable apparatus and method for purifying lubricating oil in various devices |
| US4176068A (en) * | 1977-05-10 | 1979-11-27 | Ankersmit Hendrik J | Method for the separation from each other of the components of a mixture of water, oil and dirt (sludge) as well as apparatus for performing said method |
| US4153553A (en) * | 1977-09-29 | 1979-05-08 | Davis Larry R | Apparatus for and method of reclaiming and cleaning oil from bottom settlings of tanks |
| JPS6017599B2 (en) * | 1978-08-01 | 1985-05-04 | 三菱重工業株式会社 | How to treat oily sludge |
-
1982
- 1982-11-03 FR FR8218420A patent/FR2535223B1/en not_active Expired
-
1983
- 1983-10-27 DE DE8383402106T patent/DE3363804D1/en not_active Expired
- 1983-10-27 AT AT83402106T patent/ATE19963T1/en not_active IP Right Cessation
- 1983-10-27 EP EP83402106A patent/EP0108684B2/en not_active Expired - Lifetime
- 1983-10-31 ZA ZA838124A patent/ZA838124B/en unknown
- 1983-11-01 MX MX199275A patent/MX170789B/en unknown
- 1983-11-02 CA CA000440307A patent/CA1223552A/en not_active Expired
- 1983-11-02 NO NO833995A patent/NO161542B/en unknown
- 1983-11-04 JP JP58206091A patent/JPS59130546A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| EP0108684A1 (en) | 1984-05-16 |
| JPS59130546A (en) | 1984-07-27 |
| EP0108684B1 (en) | 1986-05-28 |
| NO161542B (en) | 1989-05-22 |
| MX170789B (en) | 1993-09-13 |
| NO833995L (en) | 1984-05-04 |
| DE3363804D1 (en) | 1986-07-03 |
| ZA838124B (en) | 1985-06-26 |
| FR2535223A1 (en) | 1984-05-04 |
| JPH046406B2 (en) | 1992-02-05 |
| ATE19963T1 (en) | 1986-06-15 |
| EP0108684B2 (en) | 1998-07-22 |
| FR2535223B1 (en) | 1985-07-05 |
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