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Separating gases from liquids
ABSTRACTS British
Patent specifications
OF BRlTISH PATENTS
can be ordered
from Patents
isfed
Separating gases from liquids
to a second r*--r=r-r-:-wy.p ~ntJalrsr”,r ‘e lower than the first chamber. Gas separated from the second chamber is compressed and admixed and stabilised, preferably in an ejector, with the liquid phase introduced in the first stage. Gas extruded in the initial stage is normally fed to a drying device before being compressed. It is then conveyed through a heat exchanger to heat the liquid phase fed to the first expansion chamber. Advantages
clamber at a pressur
In BP 2138U54. Aker Engi~eeriffg A& describes a method for de~as~~ing a liquid phase, such as a carbonaceous material oil phase,and a device for implementing the method. The liquid phase is introduced into an initial stage expansion chamber; gas is then removed from the top of this chamber and liquid from the bottom. Liquid from the initial stage
Office, Orpington,
Kent BR5 3RD, England
claimed for the process are a reduction in the number of componeflfs and in the space needed for the apparatus. {2 figs, 2?000 words.)
Removing soot from tC engine exhausts InBP2198057, MananNutzfahrzeuge
Gmb~ describes a filter for removing soot from the exhaust fumes of an IC engine. The gas is fiitered by flowing throned an antiwar bed of ceramic granules held between concentric perforated tubes. Compressed air is fed to the space above the bed and when the bed is clogged the valve feeding the air is closed and the bed shaken by an uitrasoni~vibrator, Accumulated soot can also be burnt away by an electric current flowing through a tubular electrode buried in the bed. Fine mesh screens are fitted between the electrodes to retain the granuiee. (3 figs., ~,~~~ words.)
~feaning flue gases
Filtering sea water A 30 ton filtration module, designed to filter five million gallons of sea water a day, has been delivered to a Norwegian oil production platform, by Vanpipe. The contract was worth f%m. The injection water filtration package for the Narsk Hydro oil company will work in the Oseberg 2 field, about 100
Utiiising tangential tration. the Pellicon
flow
fil-
cassette ultrafiitr~ti~n system from Mllipore provides rapid concentration of antibodies, enzymes, lymphokines and other protein solutions. A combination of optimised operating pressures and the self-cleaning action of the tan212
miles off the coast of Norway. It wil’l be part of a new platform which will be operational in about a year. The module will filter sea water prior to it5 injection via an underwater borehole to the subterranean oil which is then forced to the surface. Vanpipe Process Systems, Navipation Road, Bufs~em. sfoke~off”r~enl~ ST63RU.
gentiai flow process is said to allow faster ftow rates. improved throughput and maximum recovery, A Pellicon cassette is selected with the appropriate msmbrane and molecular cut-off to suit each application. Changing the procedure requires just a simple 5 min filter change.
In BP 279%%5%,St&f ~efff~ia~o~ AG describes a filter apparatus for solid matter entrained in a first flowing medium to be cleaned and deposited on a wall as filter cake. Flue gas is fiitered by upward flow through a generally flat pleated metal filter mesh with apertures of 20 to 50 microns in width. Filter cake is removed therefrom by compressed air directed downwards through the mesh from an elongated nozzle which is reciprocated across the mesh. A filter cake suction nozzle may operate sim~la~y on the upstream side of the mesh, The width of a slot in the suction nozzle may be adjusted between 0.1 and 2mm and the filter mesh may be heated. (1 ffg., 3,000 ~~r~~,~
Process filter In BP 2198364, Schenk Filferbau Gmb~ describes a process filter, especially for use in the chemical and ph~rma~euticai industries. if consists of a container with a heating jacket and a rotating drive shaft moving in an axial direclion. A paddle support and paddles are affixed to the drive shaft which is introduced over an inward drawn container neck into the interior of the containers Feed and return lines are incorporated in the hollow of the shaft. Both the pad&es and their support have interior heating channels which connect with the feed line and the return line in the hollow shaft for the flow of heating fluid. Avoidance of overheating is one of the advantages claimed for the apparatus. (7 iigs., 2,ooO words.) May/June
Filtering t~ruug~ compressed fibres In BP 2198365, James Nowden & Co Ltd describes a filtering apparatus and method, in which liquid is fiitered through a bed of carbon fibres which are compressed between a perforate base and a perforate piston. Solids afe removed from the frbres by a fluid fed upwards through the base and sometimes also transversely through apertures The piston is reciprocated to expand and compact the fibres which may be electrically charged to improve filtration. This voltage may be reversed during cleaning. Active carbon particles or ion exchange particles may also be included in the bed. The washing fluid may also include regenerating chemicals and/or sterilising chemicals or steam. it #g., 2,000 wufds.]
Separating polymer particles in BP 2198366~ 6e~orffssk~ Tecb~otopjcbesky f~st~t~t fmen; descri bes a method and apparatus for separating suspensrons into a liquid phase and solid particles, especialty solid particles of polymer material. In operation, the suspension flows along the inside of a perforate tube: gas is fed inside the tube and caused by vanesto swirl in the suspension so that centrifugal force pushes the liquid through the tube wall to an
outlet. A second heated and whirlmg gas stream is introduced further down the tube so that almost dry solids reach a further outlet. There are further vanes outside the tube to enduce whirling. If crystals are being recovered from a solution steam, purified gas may be used to preclude the evaporation of liquids,~7#igs., %,O~ words.)
Separating liquid and gas InB~219926U, Burgess
~a#~jffg Ltd describes a vane-type separator for separating liquid from a liquid carry ing gas, especially water. It consists of hollow vanes mounted upright and spaced apart to define zig-zag paths which cause the gas to deposit liquid droplets on the vanes. The walls of the vanes have downwardly facing apertures through which the liquid passesinto the interior of the vanes; tiquid then flows downwardly and into an annular drainage channel in an enclosing duct which is of circular section. The. space between ihe outer vanes and walis of ducts are blanked off. (4 figs., 2 008 words.} 1990
Filtration & Separation
Patent specifications
OF BRlTISH PATENTS
can be ordered
from Patents
isfed
Separating gases from liquids
to a second r*--r=r-r-:-wy.p ~ntJalrsr”,r ‘e lower than the first chamber. Gas separated from the second chamber is compressed and admixed and stabilised, preferably in an ejector, with the liquid phase introduced in the first stage. Gas extruded in the initial stage is normally fed to a drying device before being compressed. It is then conveyed through a heat exchanger to heat the liquid phase fed to the first expansion chamber. Advantages
clamber at a pressur
In BP 2138U54. Aker Engi~eeriffg A& describes a method for de~as~~ing a liquid phase, such as a carbonaceous material oil phase,and a device for implementing the method. The liquid phase is introduced into an initial stage expansion chamber; gas is then removed from the top of this chamber and liquid from the bottom. Liquid from the initial stage
Office, Orpington,
Kent BR5 3RD, England
claimed for the process are a reduction in the number of componeflfs and in the space needed for the apparatus. {2 figs, 2?000 words.)
Removing soot from tC engine exhausts InBP2198057, MananNutzfahrzeuge
Gmb~ describes a filter for removing soot from the exhaust fumes of an IC engine. The gas is fiitered by flowing throned an antiwar bed of ceramic granules held between concentric perforated tubes. Compressed air is fed to the space above the bed and when the bed is clogged the valve feeding the air is closed and the bed shaken by an uitrasoni~vibrator, Accumulated soot can also be burnt away by an electric current flowing through a tubular electrode buried in the bed. Fine mesh screens are fitted between the electrodes to retain the granuiee. (3 figs., ~,~~~ words.)
~feaning flue gases
Filtering sea water A 30 ton filtration module, designed to filter five million gallons of sea water a day, has been delivered to a Norwegian oil production platform, by Vanpipe. The contract was worth f%m. The injection water filtration package for the Narsk Hydro oil company will work in the Oseberg 2 field, about 100
Utiiising tangential tration. the Pellicon
flow
fil-
cassette ultrafiitr~ti~n system from Mllipore provides rapid concentration of antibodies, enzymes, lymphokines and other protein solutions. A combination of optimised operating pressures and the self-cleaning action of the tan212
miles off the coast of Norway. It wil’l be part of a new platform which will be operational in about a year. The module will filter sea water prior to it5 injection via an underwater borehole to the subterranean oil which is then forced to the surface. Vanpipe Process Systems, Navipation Road, Bufs~em. sfoke~off”r~enl~ ST63RU.
gentiai flow process is said to allow faster ftow rates. improved throughput and maximum recovery, A Pellicon cassette is selected with the appropriate msmbrane and molecular cut-off to suit each application. Changing the procedure requires just a simple 5 min filter change.
In BP 279%%5%,St&f ~efff~ia~o~ AG describes a filter apparatus for solid matter entrained in a first flowing medium to be cleaned and deposited on a wall as filter cake. Flue gas is fiitered by upward flow through a generally flat pleated metal filter mesh with apertures of 20 to 50 microns in width. Filter cake is removed therefrom by compressed air directed downwards through the mesh from an elongated nozzle which is reciprocated across the mesh. A filter cake suction nozzle may operate sim~la~y on the upstream side of the mesh, The width of a slot in the suction nozzle may be adjusted between 0.1 and 2mm and the filter mesh may be heated. (1 ffg., 3,000 ~~r~~,~
Process filter In BP 2198364, Schenk Filferbau Gmb~ describes a process filter, especially for use in the chemical and ph~rma~euticai industries. if consists of a container with a heating jacket and a rotating drive shaft moving in an axial direclion. A paddle support and paddles are affixed to the drive shaft which is introduced over an inward drawn container neck into the interior of the containers Feed and return lines are incorporated in the hollow of the shaft. Both the pad&es and their support have interior heating channels which connect with the feed line and the return line in the hollow shaft for the flow of heating fluid. Avoidance of overheating is one of the advantages claimed for the apparatus. (7 iigs., 2,ooO words.) May/June
Filtering t~ruug~ compressed fibres In BP 2198365, James Nowden & Co Ltd describes a filtering apparatus and method, in which liquid is fiitered through a bed of carbon fibres which are compressed between a perforate base and a perforate piston. Solids afe removed from the frbres by a fluid fed upwards through the base and sometimes also transversely through apertures The piston is reciprocated to expand and compact the fibres which may be electrically charged to improve filtration. This voltage may be reversed during cleaning. Active carbon particles or ion exchange particles may also be included in the bed. The washing fluid may also include regenerating chemicals and/or sterilising chemicals or steam. it #g., 2,000 wufds.]
Separating polymer particles in BP 2198366~ 6e~orffssk~ Tecb~otopjcbesky f~st~t~t fmen; descri bes a method and apparatus for separating suspensrons into a liquid phase and solid particles, especialty solid particles of polymer material. In operation, the suspension flows along the inside of a perforate tube: gas is fed inside the tube and caused by vanesto swirl in the suspension so that centrifugal force pushes the liquid through the tube wall to an
outlet. A second heated and whirlmg gas stream is introduced further down the tube so that almost dry solids reach a further outlet. There are further vanes outside the tube to enduce whirling. If crystals are being recovered from a solution steam, purified gas may be used to preclude the evaporation of liquids,~7#igs., %,O~ words.)
Separating liquid and gas InB~219926U, Burgess
~a#~jffg Ltd describes a vane-type separator for separating liquid from a liquid carry ing gas, especially water. It consists of hollow vanes mounted upright and spaced apart to define zig-zag paths which cause the gas to deposit liquid droplets on the vanes. The walls of the vanes have downwardly facing apertures through which the liquid passesinto the interior of the vanes; tiquid then flows downwardly and into an annular drainage channel in an enclosing duct which is of circular section. The. space between ihe outer vanes and walis of ducts are blanked off. (4 figs., 2 008 words.} 1990
Filtration & Separation