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Centrifugal separator
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Abstracts of Recent Patents
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position, in which the shearing elements are within a predetermined distance from the support, and an operative position, in which the elements protrude radially from the support and extend a predetermined distance from it. Inventor: H. Randhahn, Date of publication: 25 September 1996.
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Deodorising filter Gas filter element
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In GB 22942?2 E.C. Andreae describes a gas filter element with at least two rigid perforated panels arranged in a fan-fold manner with folds. A flexible porous filter s h e e t is s e c u r e d to the apices of one of the panels, on the downstream side, to form additional filter chambers. Date of publication: 24 April ?996.
Cardioplegia filter
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In GB 2294210 Pall Corporation describes a method, system and filter assembly for r e m o v i n g d e l e t e r i o u s matter from a cardioplegia mixture. A biological fluid is pumped from a patient through a cardiotomy reservoir, and drawn into a v e nous r e s e r v o i r and then passed through a heat-exchanger. A cardioplegia fluid in a container is mixed with the biological fluid at a junction to form a cardioplegia mixture, and this mixture is passed through a filter assembly including a porous medium to remove deleterious matter from the mixture. The treated mixture is then passed to a heat-exchanger before being ret u r n e d to t h e p a t i e n t . I n v e n t o r s : T.C. Gsell, T.J. Bormann, V.I. Matkovich and F.R. Pascale, Date of publication: 24 April 1996.
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Rotor for a dynamic filter system In GB 2299033 Pall Corporation describes a dynamic filter system which has a rotor with retractable shearing elements. These elements are mounted on the rotor support, and can be moved between a retracted
In GB 2299034 Nippondenso Co Ltd describes a deodorising filter, in which a flexi b l e p o r o u s m a t e r i a l is formed into a flat plate and used as a carrier for adsorbents for the adsorption of foul-odour components in a gas. Slits are formed alternately in the front and back of this porous material. Slits are also formed to midway along the material, and the p o r o u s m a t e r i a l is then formed into pleats, where the bottom of a slit becomes a pleat angle. When compared with a flat plate-like material, the pleated porous material formed in this way has a greatly increased filtration area, to reduce the flow velocity of air passing through the filter, and greatly reduces the pressure loss. Since this generates an e x t r a m a r g i n in achieving a target pressure loss, it is possible to increase the volume of adsorbents carried by the porous m a t e r i a l , thus m a k i n g it possible to significantly improve the deodorising p e r f o r m a n c e . Inventors: S. Kadowaki, I. Taguchi and K. Okamoto, Date of publication: 25 September 1996.
Separating liquids and solids In GB 2299524 A l b u r y B o u r n e Ltd d e s c r i b e s a method and apparatus for the separation of solids and liquids. It comprises pumping a mixture of the solids and liquids through the inner tube of a filter consisting of two concentric tubes. The inner tube is made of a p e r m e a b l e m a t e r i a l , and the outer tube is impermeable. The input end of the i n n e r tube has a l a r g e r diameter than the diameter
of the o u t p u t end, thus creating a back-pressure with the inner tube. Liquid is forced through the perforations of the inner tubing wall, into the space between the inner and outer tubes. The concentrated solid matter leaves the inner tube inlet, and the liquid leaves the outer tube via one or more outlets. Nonreturn valves are fitted to the outlets of the tubes. A p e r i s t a l t i c pump may be used. It has a rotary cage w h i c h p r e s s e s the t u b e a g a i n s t the w a l l s of an evacuated chamber. An external outlet with a nonreturn valve is also pumped by the rollers to evacuate the c h a m b e r . Inventor: D.A. Hoare, Date of publication: 9 October 1996.
Filter cartridge for a cooking appliance In GB 2299527 Moulinex SA describes a filter cartridge i n t e n d e d to a b s o r b the odours and grease emitted by a cooking appliance. It comprises a body made of plastic material with a lateral wall on which two nonw o v e n fabrics are fixed, which are permeable and each made from a material which absorbs the greasy substances. The two nonwoven fabrics contain a deod o r i s i n g substance. Each of the two nonwoven fabrics has a peripheral fold which is applied against the lateral wall of the body, by means of an annular clamping element mounted around the body. This ensures the a t t a c h m e n t of the c o r r e sponding nonwoven fabric to the body of the cartridge. I n v e n t o r s : B.M. B o i s , G.R.M. Molveaux and G. Collas, Date of publication: 9 October 1996.
Air cleaner with slidably removable filter elements In GB 2299769 Philips Electronics UK Ltd describes an air cleaner which comprises a casing with an inlet, outlet and a fan. It has r e m o v a b l e filter elements, which are slidably m o u n t e d in a d i r e c t i o n transverse to the air flow. The filter e l e m e n t s have
resilient seals, and tapered cam surfaces to apply pressure to the seals. The seals may be full-length or in the form of protrusions. Inventor: A. Kuijper, Date of publication: 16 October 1996.
Solid/liquid separation In WO 96/28233 Linde AG describes a method of separating solids from liquids for use with liquids containing solid components (for example, for filtering effluent), and/or for separating emulsions such as oil-water emulsions. It uses a filter layer consisting of thin, filmlike filter particles, which can be retained by sieve floors. This permits the use of non-standard regeneration techniques, such as very rapidly siphoning off the liquid enriched with the solids and/or emulsified droplets, drawing it rapidly through a drainage pipe, and increasing the pressure in the gas chamber. Inventor: U. Fuchs, Date of publication: ?9 September 1996.
Centrifugal separator In WO 96/28237 F o s t e r Wheeler Energia Oy describes a centrifugal separator with a number of planar walls, defining a vortex chamber with an interior gas volume and for establishing at least one gas vortex in the gas volume. The gas volume cross-section is non-circular. In addition to conventional outlets, the s e p a r a t o r includes a gas inlet with at least one elongated jet-defining wall, with a free end extending from the wall into the gas volume, to define a gas jet that extends tangentially to the gas vortex in the gas volume. An insert extends between the free end of the jet-defining wall and the wall, and defines a surface where the gas flow changes direction. The insert may be solid refractory material, or include a number of cooling fluids in circulating tubes. The surface where the gas flow changes direction may be planar or curved. Inventor: T. Hypp&nen, Date of publication: "19 September 1996.
Abstracts of Recent Patents
m
Z W > Z
position, in which the shearing elements are within a predetermined distance from the support, and an operative position, in which the elements protrude radially from the support and extend a predetermined distance from it. Inventor: H. Randhahn, Date of publication: 25 September 1996.
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Deodorising filter Gas filter element
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,
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•
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• I l l m l | l •
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m m x , I i
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tll~almml ! ( X R X i
I I I I ~
In GB 22942?2 E.C. Andreae describes a gas filter element with at least two rigid perforated panels arranged in a fan-fold manner with folds. A flexible porous filter s h e e t is s e c u r e d to the apices of one of the panels, on the downstream side, to form additional filter chambers. Date of publication: 24 April ?996.
Cardioplegia filter
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In GB 2294210 Pall Corporation describes a method, system and filter assembly for r e m o v i n g d e l e t e r i o u s matter from a cardioplegia mixture. A biological fluid is pumped from a patient through a cardiotomy reservoir, and drawn into a v e nous r e s e r v o i r and then passed through a heat-exchanger. A cardioplegia fluid in a container is mixed with the biological fluid at a junction to form a cardioplegia mixture, and this mixture is passed through a filter assembly including a porous medium to remove deleterious matter from the mixture. The treated mixture is then passed to a heat-exchanger before being ret u r n e d to t h e p a t i e n t . I n v e n t o r s : T.C. Gsell, T.J. Bormann, V.I. Matkovich and F.R. Pascale, Date of publication: 24 April 1996.
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LL e CxJ C,J (9)
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Rotor for a dynamic filter system In GB 2299033 Pall Corporation describes a dynamic filter system which has a rotor with retractable shearing elements. These elements are mounted on the rotor support, and can be moved between a retracted
In GB 2299034 Nippondenso Co Ltd describes a deodorising filter, in which a flexi b l e p o r o u s m a t e r i a l is formed into a flat plate and used as a carrier for adsorbents for the adsorption of foul-odour components in a gas. Slits are formed alternately in the front and back of this porous material. Slits are also formed to midway along the material, and the p o r o u s m a t e r i a l is then formed into pleats, where the bottom of a slit becomes a pleat angle. When compared with a flat plate-like material, the pleated porous material formed in this way has a greatly increased filtration area, to reduce the flow velocity of air passing through the filter, and greatly reduces the pressure loss. Since this generates an e x t r a m a r g i n in achieving a target pressure loss, it is possible to increase the volume of adsorbents carried by the porous m a t e r i a l , thus m a k i n g it possible to significantly improve the deodorising p e r f o r m a n c e . Inventors: S. Kadowaki, I. Taguchi and K. Okamoto, Date of publication: 25 September 1996.
Separating liquids and solids In GB 2299524 A l b u r y B o u r n e Ltd d e s c r i b e s a method and apparatus for the separation of solids and liquids. It comprises pumping a mixture of the solids and liquids through the inner tube of a filter consisting of two concentric tubes. The inner tube is made of a p e r m e a b l e m a t e r i a l , and the outer tube is impermeable. The input end of the i n n e r tube has a l a r g e r diameter than the diameter
of the o u t p u t end, thus creating a back-pressure with the inner tube. Liquid is forced through the perforations of the inner tubing wall, into the space between the inner and outer tubes. The concentrated solid matter leaves the inner tube inlet, and the liquid leaves the outer tube via one or more outlets. Nonreturn valves are fitted to the outlets of the tubes. A p e r i s t a l t i c pump may be used. It has a rotary cage w h i c h p r e s s e s the t u b e a g a i n s t the w a l l s of an evacuated chamber. An external outlet with a nonreturn valve is also pumped by the rollers to evacuate the c h a m b e r . Inventor: D.A. Hoare, Date of publication: 9 October 1996.
Filter cartridge for a cooking appliance In GB 2299527 Moulinex SA describes a filter cartridge i n t e n d e d to a b s o r b the odours and grease emitted by a cooking appliance. It comprises a body made of plastic material with a lateral wall on which two nonw o v e n fabrics are fixed, which are permeable and each made from a material which absorbs the greasy substances. The two nonwoven fabrics contain a deod o r i s i n g substance. Each of the two nonwoven fabrics has a peripheral fold which is applied against the lateral wall of the body, by means of an annular clamping element mounted around the body. This ensures the a t t a c h m e n t of the c o r r e sponding nonwoven fabric to the body of the cartridge. I n v e n t o r s : B.M. B o i s , G.R.M. Molveaux and G. Collas, Date of publication: 9 October 1996.
Air cleaner with slidably removable filter elements In GB 2299769 Philips Electronics UK Ltd describes an air cleaner which comprises a casing with an inlet, outlet and a fan. It has r e m o v a b l e filter elements, which are slidably m o u n t e d in a d i r e c t i o n transverse to the air flow. The filter e l e m e n t s have
resilient seals, and tapered cam surfaces to apply pressure to the seals. The seals may be full-length or in the form of protrusions. Inventor: A. Kuijper, Date of publication: 16 October 1996.
Solid/liquid separation In WO 96/28233 Linde AG describes a method of separating solids from liquids for use with liquids containing solid components (for example, for filtering effluent), and/or for separating emulsions such as oil-water emulsions. It uses a filter layer consisting of thin, filmlike filter particles, which can be retained by sieve floors. This permits the use of non-standard regeneration techniques, such as very rapidly siphoning off the liquid enriched with the solids and/or emulsified droplets, drawing it rapidly through a drainage pipe, and increasing the pressure in the gas chamber. Inventor: U. Fuchs, Date of publication: ?9 September 1996.
Centrifugal separator In WO 96/28237 F o s t e r Wheeler Energia Oy describes a centrifugal separator with a number of planar walls, defining a vortex chamber with an interior gas volume and for establishing at least one gas vortex in the gas volume. The gas volume cross-section is non-circular. In addition to conventional outlets, the s e p a r a t o r includes a gas inlet with at least one elongated jet-defining wall, with a free end extending from the wall into the gas volume, to define a gas jet that extends tangentially to the gas vortex in the gas volume. An insert extends between the free end of the jet-defining wall and the wall, and defines a surface where the gas flow changes direction. The insert may be solid refractory material, or include a number of cooling fluids in circulating tubes. The surface where the gas flow changes direction may be planar or curved. Inventor: T. Hypp&nen, Date of publication: "19 September 1996.