US3782416A - Apparatus for filling and emptying reservoirs - Google Patents
Apparatus for filling and emptying reservoirs Download PDFInfo
- Publication number
- US3782416A US3782416A US00256025A US3782416DA US3782416A US 3782416 A US3782416 A US 3782416A US 00256025 A US00256025 A US 00256025A US 3782416D A US3782416D A US 3782416DA US 3782416 A US3782416 A US 3782416A
- Authority
- US
- United States
- Prior art keywords
- filling
- opening
- duct
- emptying
- shaped
- 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 - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/0005—Baffle plates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86348—Tank with internally extending flow guide, pipe or conduit
Definitions
- ABSTRACT A device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put
- a device of this type suitable more particularly for filling, is described in French Patent specification No. 1,508,344. It comprises an upwardly open dish with a vertical axis, into which the liquid supply duct opens tangentially, and which has at its centre a diffuser core which disperses the liquid in a sheet of revolution about an axis of the diffuser core.
- a device embodying the invention permits the liquid to be both introduced and removed without excessive turbulence, minimizing waves and pulsations on the surface of the liquid, for example in a floating-cover reservoir. It enables one liquid to be injected into another at a high flow rate, the angle of the jet in the device and the low exit speed of the liquid injected, on account of the very small head, preventing emulsification of the liquids in contact.
- a reservoir filling and emptying device provides, through a lateral annular orifice, a high-flow-rate flow, the inclinations of whose stream lines are slight relative to the horizontal and substantially equal right around the vertical axis of the device, the device comprising a straight or curved duct through one end of which the fluid flows with a substantially constant speed distribution, the said end opening vertically and centrally, along the vertical axis of revolution, into a shaped diffusing opening covered by a shaped diffuser screen spaced from the opening, perpendicular to and of revolution relative to the axis of revolution of the outlet.
- the duct which is tubular and curved and has a reduced radius of curvature, is specially shaped to produce a flow which is without vibration and in which the jet of liquid does not detach from the wall.
- a duct of this type described in French patent specification No. 1,599,173, and corresponding U.S. Pat. No. 3,623,511 granted Nov. 30, 197i can give substantially constant speeds at all points of the cross-section at the outlet from the bend, and introduces only a slight head loss.
- the bend should have a straight length at least ten times the diameter of the pipe of the diffuser, so that the speeds in the line's outlet cross-section are uniformly distributed.
- FIG. 1 represents a vertical section through a device embodying the invention
- FIG. 2 represents an underside plan view of this device
- FIG. 3 represents a variant of the device
- FIG. 4 illustrates installation of a device embodying the invention beneath a tank cover or roof
- FIG. 5 shows a device embodying the invention and the liquid supply ducts, installed above the bottom of the reservoir.
- the device shown in FIGS. 1 and 2 has a diffusing opening 1 of revolution with a deflector screen or cover 2 of revolution perpendicular to the vertical axis C of revolution of the opening I.
- the cylindrical orifice 3 of revolution is formed between the opening 1 and cover 2.
- the diffusing opening 1 may be shaped to help the jet spread out over its periphery.
- the deflector cover 2 is also shaped and is formed of a dish 21 and of a conical tip 22 for dispersing the vertical central jet. Since the speed of the jet is equal at all points on its crosssection, the jet is therefore distributed regularly right around the device.
- the cover 2 bears a peripheral, an-
- the cover 2 is spaced from the opening by spacer tubes 5, the device being assembled by means of bolts 7.
- the shaped diffusing opening 1 of the device has a bulge defining the horizontal circular orifice to promote the flow.
- the liquid preferably approaches or leaves the opening 1 in a special compact bend 4 fixed to the opening 1 by a flange 41 and collar 11 and to the horizontal liquid supply duct 6 by flanges 42 and 61.
- the duct 4 described in the above-mentioned patent specification, conforms in shape to the liquid jet in order to prevent any detachment of the jet from the inside surface of the bend and to maintain a constant live jet cross-section, that is to say, to keep the speed of the liquid constant.
- FIG. 1 the liquid flow is produced above the bottom of the reservoir 7, the ducts 4 and 6 running below the reservoir bottom.
- the device may be installed as illustrated in FIGS. 4 and 5.
- FIG. 4 shows an installation in which the liquid flow is produced below the roof or cover of a reservoir 7 or below the floating cover 7 of a reservoir, the ducts 4 and 6 being positioned above.
- FIG. 5 illustrates the installation of the device in a reservoir 7 in a case in which it would be difficult or impossible to install the ducts 4 and 6 below the reservoir bottom, for example, if the filling and emptying system of an existing tank were being installed or modified.
- the opening 1 is' situated above the cover 2, the ducts 4 and 6 being submerged and inside the reservoir 7.
- Tanks or other enclosures which are to be fitted with devices embodying the invention may have one device in the centre of their bottom or cover, or a plurality of devices distributed over them.
- a device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put, low-speed fluid flow, the inclinations of whose stream lines are slight and substantially equal right around the vertical axis of the device comprising a curved duct of varying shape and constant crosssection having a wall portion on the side of the concavity which conforms substantially to the shape of the fluid jet, one end of said duct opening vertically into a shaped diffusing opening, a deflector screen spaced from and covering the shaped opening, and a substantially frusto-conical central portion for said screen coaxial with said one end of said duct.
- a device for filling and emptying reservoirs as de scribed in claim 1 said deflector screen being perpendicular to and of revolution relative to the axis of revolution of the opening, and means for promoting the flow during filling and emptying and comprising a rounded edge on the cover.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put, low-speed fluid flow whose stream lines are slight and substantially equal right around the vertical axis of the device. The device includes a curved duct of constant cross-section whose wall portion on the side of the concavity substantially conforms to the shape of the fluid jet. An end of the duct opens vertically into a shaped diffusing opening covered by a deflector screen spaced from the shaped outlet.
Description
United States Patent 1 1 1 1 3,782,416
Levin Jan. 1, 1974 APPARATUS FOR FILLING AND 2,669,254 2/1954 Mork 210 172 EMPTYING RESERVOIRS 2,732,071 l/1956 Crow 137/592 X [75] Inventor: Leon Levm, Seyssmet, France Primary E mminer Hemy T Klinksiek [73] Assignee: B.V.S., Grenoble, France Aflomeywilliam Kerkam.
[22] Filed: May 23, i972 21 Appl. No.: 256,025 [57 ABSTRACT A device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put,
[301 Forelgn Application pnomy Data low-speed fluid flow whose stream lines are slight and June 28, 1971 France ..7l23434 Substantially equal right around the vertical axis of the 52 11.5. C1 137/590, 4/196, 210/172 device- The device includes f duct 9 constant [511 Im. c1. Fl7d 1/10 cmss'secfim' wall the of [58] Field of Search 4/17217, 172.18, cmcavity Substantially conforms to the Shape of the 4/195 19 137/5 210/172, 168, fluid jet. An end of the duct opens vertically into a 9 247, 304 305, 456 shaped diffusing opening covered by a deflector screen spaced from the shaped outlet.
[56] References Cited (11 121 5 5 Drawing Figures UNITED STATES PATENTS 1,001,122 8/l9ll Charmois 4/196 i 1 4' 7 L i f l 1 A I /X/ 71 t L .1 5 l l 3 APPARATUS FOR FILLING AND EMPTYING RESERVOIRS The invention relates to a reservoir filling and empty ing device which is suitable for large flow rates, while giving a low head loss and keeping the surface of the liquid as smooth as possible.
A device of this type, suitable more particularly for filling, is described in French Patent specification No. 1,508,344. It comprises an upwardly open dish with a vertical axis, into which the liquid supply duct opens tangentially, and which has at its centre a diffuser core which disperses the liquid in a sheet of revolution about an axis of the diffuser core.
A device embodying the invention permits the liquid to be both introduced and removed without excessive turbulence, minimizing waves and pulsations on the surface of the liquid, for example in a floating-cover reservoir. It enables one liquid to be injected into another at a high flow rate, the angle of the jet in the device and the low exit speed of the liquid injected, on account of the very small head, preventing emulsification of the liquids in contact.
According to the invention a reservoir filling and emptying device provides, through a lateral annular orifice, a high-flow-rate flow, the inclinations of whose stream lines are slight relative to the horizontal and substantially equal right around the vertical axis of the device, the device comprising a straight or curved duct through one end of which the fluid flows with a substantially constant speed distribution, the said end opening vertically and centrally, along the vertical axis of revolution, into a shaped diffusing opening covered by a shaped diffuser screen spaced from the opening, perpendicular to and of revolution relative to the axis of revolution of the outlet.
According to an important feature of the invention the duct, which is tubular and curved and has a reduced radius of curvature, is specially shaped to produce a flow which is without vibration and in which the jet of liquid does not detach from the wall. A duct of this type, described in French patent specification No. 1,599,173, and corresponding U.S. Pat. No. 3,623,511 granted Nov. 30, 197i can give substantially constant speeds at all points of the cross-section at the outlet from the bend, and introduces only a slight head loss. The bend should have a straight length at least ten times the diameter of the pipe of the diffuser, so that the speeds in the line's outlet cross-section are uniformly distributed.
The invention will now be described in more detail with reference to embodiments, given by way of example and illustrated in the drawings:
FIG. 1 represents a vertical section through a device embodying the invention;
FIG. 2 represents an underside plan view of this device;
FIG. 3 represents a variant of the device;
FIG. 4 illustrates installation of a device embodying the invention beneath a tank cover or roof; and
FIG. 5 shows a device embodying the invention and the liquid supply ducts, installed above the bottom of the reservoir.
The device shown in FIGS. 1 and 2 has a diffusing opening 1 of revolution with a deflector screen or cover 2 of revolution perpendicular to the vertical axis C of revolution of the opening I. The cylindrical orifice 3 of revolution is formed between the opening 1 and cover 2. The diffusing opening 1 may be shaped to help the jet spread out over its periphery. The deflector cover 2 is also shaped and is formed of a dish 21 and of a conical tip 22 for dispersing the vertical central jet. Since the speed of the jet is equal at all points on its crosssection, the jet is therefore distributed regularly right around the device. The cover 2 bears a peripheral, an-
nular rounded portion 23 to facilitate the flow over its edge, particularly during emptying. The cover 2 is spaced from the opening by spacer tubes 5, the device being assembled by means of bolts 7. In the variant shown in FIG. 3 the shaped diffusing opening 1 of the device has a bulge defining the horizontal circular orifice to promote the flow.
The liquid preferably approaches or leaves the opening 1 in a special compact bend 4 fixed to the opening 1 by a flange 41 and collar 11 and to the horizontal liquid supply duct 6 by flanges 42 and 61. The duct 4, described in the above-mentioned patent specification, conforms in shape to the liquid jet in order to prevent any detachment of the jet from the inside surface of the bend and to maintain a constant live jet cross-section, that is to say, to keep the speed of the liquid constant.
In FIG. 1 the liquid flow is produced above the bottom of the reservoir 7, the ducts 4 and 6 running below the reservoir bottom. Alternatively, the device may be installed as illustrated in FIGS. 4 and 5.
FIG. 4 shows an installation in which the liquid flow is produced below the roof or cover of a reservoir 7 or below the floating cover 7 of a reservoir, the ducts 4 and 6 being positioned above.
FIG. 5 illustrates the installation of the device in a reservoir 7 in a case in which it would be difficult or impossible to install the ducts 4 and 6 below the reservoir bottom, for example, if the filling and emptying system of an existing tank were being installed or modified. In FIG. 5 the opening 1 is' situated above the cover 2, the ducts 4 and 6 being submerged and inside the reservoir 7.
Obviously, the invention is not restricted to the details of the embodiment just described, which may be modified without exceeding the scope of the invention.
Tanks or other enclosures which are to be fitted with devices embodying the invention may have one device in the centre of their bottom or cover, or a plurality of devices distributed over them.
I claim:
1. A device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put, low-speed fluid flow, the inclinations of whose stream lines are slight and substantially equal right around the vertical axis of the device, comprising a curved duct of varying shape and constant crosssection having a wall portion on the side of the concavity which conforms substantially to the shape of the fluid jet, one end of said duct opening vertically into a shaped diffusing opening, a deflector screen spaced from and covering the shaped opening, and a substantially frusto-conical central portion for said screen coaxial with said one end of said duct.
2. A device for filling and emptying reservoirs as de scribed in claim 1, said deflector screen being perpendicular to and of revolution relative to the axis of revolution of the opening, and means for promoting the flow during filling and emptying and comprising a rounded edge on the cover.
Claims (2)
1. A device for filling and emptying reservoirs through a lateral annular orifice providing a high through-put, low-speed fluid flow, the inclinations of whose stream lines are slight and substantially equal right around the vertical axis of the device, comprising a curved duct of varying shape and constant crosssection having a wall portion on the side of the concavity which conforms substantially to the shape of the fluid jet, one end of said duct opening vertically into a shaped diffusing opening, a deflector screen spaced from and covering the shaped opening, and a substantially frusto-conical central portion for said screen coaxial with said one end of said duct.
2. A device for filling and emptying reservoirs as described in claim 1, said deflector screen being perpendicular to and of revolution relative to the axis of revolution of the opening, and means for promoting the flow during filling and emptying and comprising a rounded edge on the cover.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7123434A FR2143534B1 (en) | 1971-06-28 | 1971-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3782416A true US3782416A (en) | 1974-01-01 |
Family
ID=9079408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00256025A Expired - Lifetime US3782416A (en) | 1971-06-28 | 1972-05-23 | Apparatus for filling and emptying reservoirs |
Country Status (4)
Country | Link |
---|---|
US (1) | US3782416A (en) |
DE (1) | DE2221850A1 (en) |
FR (1) | FR2143534B1 (en) |
GB (1) | GB1380337A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4315531A (en) * | 1978-05-06 | 1982-02-16 | Westerwalder Eisenwerk Gerhard Gmbh | Transport container |
US4394966A (en) * | 1978-05-09 | 1983-07-26 | Snyder Industries, Inc. | Spraying apparatus having a fluid storage tank with agitator and anti-vortex tank fittings |
US4571948A (en) * | 1982-11-29 | 1986-02-25 | Ira Orenstein | Fluid diffuser and method for constructing the same |
US5197513A (en) * | 1992-04-03 | 1993-03-30 | San Luis Tank Piping Construction Co. Inc. | Stratified chamber system for receiving, storing and dispensing two different density liquids |
US6748972B2 (en) * | 2000-05-29 | 2004-06-15 | Renesas Technology Corp. | Water tank, cooling tower including the same and method of manufacturing semiconductor device |
US6805160B1 (en) * | 2002-03-08 | 2004-10-19 | William H. Keichler | Pump intake flow control |
US20050051219A1 (en) * | 2003-09-08 | 2005-03-10 | Usf Consumer & Commercial Watergroup, Inc. | Water softener manifold retainer assembly |
US20070145194A1 (en) * | 2005-12-22 | 2007-06-28 | Behruzi Kei P | Fuel tank with specialized tank outlet for spacecraft |
US20080237099A1 (en) * | 2007-02-03 | 2008-10-02 | Kei Philipp Behruzi | Tank with a gas extraction device for storing cryogenic liquid or fuel for spacecraft |
US20090134170A1 (en) * | 2005-09-17 | 2009-05-28 | Kei Philipp Behruzi | Propellant Tank for Cryogenic Liquids |
US20090293729A1 (en) * | 2008-06-03 | 2009-12-03 | Astrium Gmbh | Tank with a gas supply and extraction device for storing cryogenic liquid or fuel for spacecraft |
US20100008180A1 (en) * | 2006-07-03 | 2010-01-14 | Soren Friis Krogh | Apparatus for dissolving solid particles and liquid substances in a liquid |
US8316884B1 (en) * | 2010-07-29 | 2012-11-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Safety drain system for fluid reservoir |
CN110966256A (en) * | 2019-11-22 | 2020-04-07 | 浙江金木泵业有限公司 | Water pump and anti-return device thereof |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ190351A (en) * | 1978-05-06 | 1983-07-15 | Westerwaelder Eisen Gerhard | Transport container for flowable materials |
RU2449944C2 (en) * | 2010-07-02 | 2012-05-10 | Татьяна Сергеевна Мещерякова | Device to fill and drain reservoir with oil and oil products |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1001122A (en) * | 1910-07-25 | 1911-08-22 | Dennis C Charmois | Supply and waste for bath-tubs. |
US2669254A (en) * | 1948-04-21 | 1954-02-16 | Bucyrus Erie Co | Velocity-reducing and filtering inlet for hydraulic tanks |
US2732071A (en) * | 1956-01-24 | Tank bleeder |
-
1971
- 1971-06-28 FR FR7123434A patent/FR2143534B1/fr not_active Expired
-
1972
- 1972-05-04 DE DE19722221850 patent/DE2221850A1/en active Pending
- 1972-05-18 GB GB2335372A patent/GB1380337A/en not_active Expired
- 1972-05-23 US US00256025A patent/US3782416A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2732071A (en) * | 1956-01-24 | Tank bleeder | ||
US1001122A (en) * | 1910-07-25 | 1911-08-22 | Dennis C Charmois | Supply and waste for bath-tubs. |
US2669254A (en) * | 1948-04-21 | 1954-02-16 | Bucyrus Erie Co | Velocity-reducing and filtering inlet for hydraulic tanks |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4315531A (en) * | 1978-05-06 | 1982-02-16 | Westerwalder Eisenwerk Gerhard Gmbh | Transport container |
US4394966A (en) * | 1978-05-09 | 1983-07-26 | Snyder Industries, Inc. | Spraying apparatus having a fluid storage tank with agitator and anti-vortex tank fittings |
US4571948A (en) * | 1982-11-29 | 1986-02-25 | Ira Orenstein | Fluid diffuser and method for constructing the same |
US5197513A (en) * | 1992-04-03 | 1993-03-30 | San Luis Tank Piping Construction Co. Inc. | Stratified chamber system for receiving, storing and dispensing two different density liquids |
US6748972B2 (en) * | 2000-05-29 | 2004-06-15 | Renesas Technology Corp. | Water tank, cooling tower including the same and method of manufacturing semiconductor device |
US6805160B1 (en) * | 2002-03-08 | 2004-10-19 | William H. Keichler | Pump intake flow control |
US20050051219A1 (en) * | 2003-09-08 | 2005-03-10 | Usf Consumer & Commercial Watergroup, Inc. | Water softener manifold retainer assembly |
US8381938B2 (en) | 2005-09-17 | 2013-02-26 | Astrium Gmbh | Propellant tank for cryogenic liquids |
US20090134170A1 (en) * | 2005-09-17 | 2009-05-28 | Kei Philipp Behruzi | Propellant Tank for Cryogenic Liquids |
US20070145194A1 (en) * | 2005-12-22 | 2007-06-28 | Behruzi Kei P | Fuel tank with specialized tank outlet for spacecraft |
US7621291B2 (en) * | 2005-12-22 | 2009-11-24 | Eads Space Transportation Gmbh | Fuel tank with specialized tank outlet for spacecraft |
US20100008180A1 (en) * | 2006-07-03 | 2010-01-14 | Soren Friis Krogh | Apparatus for dissolving solid particles and liquid substances in a liquid |
US8048211B2 (en) | 2007-02-03 | 2011-11-01 | Astrium Gmbh | Tank with a gas extraction device for storing cryogenic liquid or fuel for spacecraft |
US20080237099A1 (en) * | 2007-02-03 | 2008-10-02 | Kei Philipp Behruzi | Tank with a gas extraction device for storing cryogenic liquid or fuel for spacecraft |
US20090293729A1 (en) * | 2008-06-03 | 2009-12-03 | Astrium Gmbh | Tank with a gas supply and extraction device for storing cryogenic liquid or fuel for spacecraft |
US8025721B2 (en) | 2008-06-03 | 2011-09-27 | Astrium Gmbh | Tank with a gas supply and extraction device for storing cryogenic liquid or fuel for spacecraft |
US8316884B1 (en) * | 2010-07-29 | 2012-11-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Safety drain system for fluid reservoir |
CN110966256A (en) * | 2019-11-22 | 2020-04-07 | 浙江金木泵业有限公司 | Water pump and anti-return device thereof |
CN110966256B (en) * | 2019-11-22 | 2021-01-08 | 浙江金木泵业有限公司 | Water pump and anti-return device thereof |
Also Published As
Publication number | Publication date |
---|---|
FR2143534B1 (en) | 1975-06-06 |
DE2221850A1 (en) | 1973-01-11 |
FR2143534A1 (en) | 1973-02-09 |
GB1380337A (en) | 1975-01-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3782416A (en) | Apparatus for filling and emptying reservoirs | |
US3584840A (en) | Mixing device for introducing additives into a liquid | |
US4560474A (en) | Flotation apparatus for floating fiber suspensions extracted from waste paper | |
US4210534A (en) | Multiple stage jet nozzle and aeration system | |
US3735926A (en) | Liquid spray device with fixed and rotatable diffusers | |
US20060245295A1 (en) | Storage/treatment tank mixing system | |
US3947359A (en) | Aeration and mixing of liquids | |
US3797809A (en) | Aerator apparatus | |
US4454078A (en) | Mixing systems having agitators for mixing gas with liquid | |
GB2108858A (en) | Injection apparatus | |
SE432360B (en) | SET AND DEVICE FOR DISPOSAL OF SOLID AND LIQUID POLLUTANTS FROM GASES, SPECIFICALLY FOR SHIPPING BOXES | |
TW201318694A (en) | Distributor tray for a gas and a liquid, reactor equipped with such a tray and utilization of said tray | |
HU215329B (en) | Cyclone with double acting extraction system, and method for a biological water-treating | |
JPH07856A (en) | Floatation cell | |
US3960175A (en) | Installation for charging liquids, particularly fermentation liquids, with gas | |
US4620926A (en) | Flotation apparatus for flotation of fibrous stock suspension recovered from waste paper | |
GB1467690A (en) | Storage tanks for flammable liquids | |
KR930020484A (en) | Cooling tube fuel rod suitable for light water reactor | |
US4381268A (en) | Device for gassing liquids or suspensions | |
US3246885A (en) | Saturation tank | |
JPS5817854A (en) | Floatation separator for using used paper | |
SE505438C2 (en) | Method and apparatus for maintaining a near constant overpressure of the above hot water layer in a pressureless hot water accumulator for a district heating system existing water vapor | |
JPH0323210B2 (en) | ||
JPH06503514A (en) | Sewage circular tank central injection device | |
KR920700713A (en) | Particulate Dispersion Forming Device |