| Patent Number |
Title Of Patent |
Date Issued |
| 5879638 |
Fluidized bed reactor with gas distributor |
March 9, 1999 |
| An improved fluidized bed reactor having a reactor shell and at least one reactor subsystem within the shell, the reactor subsystem having a reaction chamber and a wall, the improvement comprising at least one fluidizing gas distributor associated with the reactor subsystem and posit |
| 5779989 |
Fluidized bed reactor with gas distributor and baffle |
July 14, 1998 |
| An improved fluidized bed reactor having a reactor shell and a reaction chamber within the shell, the reaction chamber having chamber walls and a chamber bottom portion, the improvement comprising at least one baffle disposed within the reaction chamber, the baffle comprising a pair of |
| 5494227 |
High pressure screen shower |
February 27, 1996 |
| A shower system comprising a header having a fluid inlet port, a plurality of substantially vertically aligned spray nozzles attached consecutively to said header and arranged in a substantially arcuate formation, and a drive system for laterally reciprocating said header. |
| 5470472 |
Rotary drum filter with reciprocating nozzle means |
November 28, 1995 |
| A rotating drum filter assembly for thickening lime sludge includes a liquid jet distributor for directing liquid jets against a strip of lime sludge filter cake on the ascending side of the drum. The distributor is positioned on the ascending side of the drum and within 45.degree. of a |
| 5441406 |
Firing liquid and gaseous fuels for a circulating fluidizing bed reactor |
August 15, 1995 |
| A method and system for introducing combustion gases to the upper portion of the dense phase or transition portion of a circulating fluidized bed reactor. The combustion gases are produced in a burner external to the dense phase portion of the reactor wherein the burner receives a mixtur |
| 5429581 |
Wear-resistant tile surfacing for a centrifuge conveyor |
July 4, 1995 |
| A hard surfaced screw conveyor comprising a helical metal blade mounted for rotation about a longitudinal axis of the helix and radially extending to an end surface, the blade defining at least one female formation therein having a substantially dovetail shape and a longitudinal axis |
| 5389249 |
Clarifier with rotating sealed cover |
February 14, 1995 |
| A clarifier comprising a tank, a feedwell, a cover and a raking structure. The cover is rotatably and sealingly engaged with the tank so as to prevent foul air within the tank from escaping into the atmosphere. The feed well and the raking structure are supported by and rotatable with th |
| 5368731 |
Vacuum assisted slaker classifier |
November 29, 1994 |
| The grit conveyance system of a classifier having a wash region above the liquid layer is provided with a vacuum means in the wash region for positive removal of liquids through a metal screen for disposal. |
| 5364335 |
Disc-decanter centrifuge |
November 15, 1994 |
| A vertically oriented centrifuge swivably engaged to a support structure so as to enable the centrifuge to attain an optimal operational attitude. The centrifuge includes a bowl, a screw conveyor disposed within the bowl, a hub disposed within the upper portion of the screw conveyor wher |
| 5326471 |
Microstrainer filter deck panel |
July 5, 1994 |
| The present invention relates to a screening device with a screening cartridge that consists of a cartridge frame and a flexible web of filter material that is stretched in the frame. In order to create a screening device in which both the screening cartridges as a whole as well as the |
| 5300233 |
Process of displacement washing in a centrifuge filter |
April 5, 1994 |
| Displacement washing of slurry body is provided in a centrifuge filter (peeler centrifuge) by introducing wash liquid along the inner surface of the drum while the drum is rotating. The wash liquid moves through the filter into the slurry body in a broad front to displace the mother liqu |
| 5284249 |
Direct hydraulic drive for large flotation cells |
February 8, 1994 |
| A flotation apparatus for floating minerals from fluid containing minerals in particulate form. The flotation apparatus includes a hydraulic motor directly connected to a drive shaft for driving a rotor located in the flotation cell, the hydraulic motor being powered by a hydraulic power |
| 5282575 |
High pressure screen shower |
February 1, 1994 |
| A shower system for a screening machine or unit. The shower system includes a spray nozzle connected to a movement arm, a driver for longitudinally moving the movement arm in a reciprocal path, and an indexing system adapted to allow limited axial rotation of the movement arm at pred |
| 5269928 |
Clarifier tanks |
December 14, 1993 |
| A clarifier tank having a center column is provided with a center-driven bottom rake mechanism for settled sludge removal, a rotating scum rake mechanism comprised of pipes with longitudinal openings for scum removal via the center column, the rake mechanisms rotating in the same or |
| 5252041 |
Automatic control system for diaphragm pumps |
October 12, 1993 |
| A method and apparatus for controlling the discharge time of a fluid activated diaphragm pump. The control system regulates the discharge time, by measuring the discharge time and comparing the measured time with a predetermined desired discharge time. The control system includes, inter |
| 5246579 |
Screen device with quick release mounting |
September 21, 1993 |
| A screen assembly for use with a solids-liquid separation screen device that allows for simply replacement or adjustment of the screen assembly. The screen assembly includes an arcuately shaped screen held between pair of side panels. When installed, the screen assembly rest on a ledge f |
| 5205926 |
Froth flotation machine |
April 27, 1993 |
| The invention relates to an improved flotation cell design for the mining industry. The flotation cell includes a cylindrical froth flotation unit and a unique hexagonal overflow froth launder. The unique design optimizes the froth flotation process and allows for the economical utilizat |
| 5198035 |
Corn wet milling process for manufacturing starch |
March 30, 1993 |
| High-rate washing centrifuges are employed in a corn wet milling process to accomplish displacement washing of the starch and a sharp classification into starch and gluten. |
| 5194146 |
Cenrifuge filter with closable bypass |
March 16, 1993 |
| A drum centrifuge has a housing, a drum in the housing, an axially extending outer foraminous side wall in the interior of the drum forming an outer chamber, and a transversely extending foraminous end wall in the drum forming a bypass chamber radially inward of the outer chamber. A |
| 5076890 |
Method for pulp quality control and regulation |
December 31, 1991 |
| The present invention relates to a method of qualitative and quantified monitoring of the instant local physical state of a substantially incompressible fluid material such as a liquid or pasty substance (for instance slurry or pulp) and a device for carrying out this method and the |
| 5067982 |
Corn steeping process and apparatus |
November 26, 1991 |
| A corn steeping process is conducted in a fluidized bed apparatus with steeping liquor introduced at the bottom of the apparatus and removed from the top of the apparatus after traversing the body of fluidized corn grains. |
| 4969404 |
Ash classifier-cooler-combustor |
November 13, 1990 |
| A method for treating ash produced by waste coal fluidized bed boilers in which hot ash fines and heated secondary air are introduced into the boiler as the coarse ash is cooled. An ash treatment system for cooperation with a fluidized bed boiler operating on waste fuel having a high |
| 4957565 |
Process for producing starch from cereals |
September 18, 1990 |
| A process for the production of starch from cereals includes the steps (a) subjecting dry-ground dehusked grains to enzyme treatment, (b) homogenizing the treated product (optional), (c) extracting starch from the homogenized product, leaving the fibre, (d) concentrating the starch t |
| 4914029 |
Process for steeping cereals with a new enzyme preparation |
April 3, 1990 |
| Corn or sorghum kernels are steeped in warm water containing sulfur dioxide in the presence of an enzyme preparation including one or more phytin-degrading enzymes, such as phytase and acid phosphatases, to eliminate or greatly reduce phytic acid and the salts of phytic acid. |
| 4892656 |
Vacuum filter with releasably clamped sealing strip |
January 9, 1990 |
| A vacuum filter for the separation of solids from liquids, comprising an endlessly circulating array of troughs which constitute a common horizontal filter surface, on which an endless filter cloth is laid, in which each trough has an elastic sealing strip on that rimless edge which |
| 4861495 |
Press belt device for horizontal filters |
August 29, 1989 |
| A method of dewatering filter cake in which the cake is supported on a positively driven pervious conveyor belt or filter cloth. The cake is guided about the circumference of a drum, with the drum positively driven at a variable speed of rotation. In the region of the drum, the pervious |
| 4853115 |
Rake classifier |
August 1, 1989 |
| A rake classifier provides reciprocating movement using crank-mounted drive shafts to establish translatory forward movement as well as lifting and rearward movement of the rake structure. |
| 4800017 |
Flotation mechanism |
January 24, 1989 |
| An improved flotation cell for recovery of minerals from ore using a three phase system flotation process provides improved metallurgical recovery through improved rotor/stator and cell design by establishing good zonal separation within the cell and minimizing froth turbulence, providin |
| 4759835 |
Method for discharging cake formed on an electrode structure |
July 26, 1988 |
| A method and apparatus for discharging a cake of suspended solids formed on an electrode structure, the electrode structure comprising an electrode, a membrane wall, an electrolyte chamber formed by the membrane wall, and means for increasing the pressure inside the electrolyte chamber s |
| 4758319 |
Dialyzing crossflow electrofilter with improved electrode |
July 19, 1988 |
| A membrane for dewatering a suspension of solids in a carrier liquid by means of either an electrically augmented vacuum filter (EAVF) or an electrically augmented crossflow device. The EAVF and crossflow devices both include an anodic structure comprising an anode, anolyte and a filter |
| 4737277 |
Vacuum expression belt tracking and control apparatus for rotary drum vacuum filter |
April 12, 1988 |
| A rotary drum vacuum filter suitable for processing pulp slurries is provided with a vacuum expression belt. The invention provides a method and apparatus for tracking and controlling the belt during operation. The belt is positioned by a moveable frame for expressing filtrate from the |
| 4726902 |
Cyclone degritter for solids liquids separation |
February 23, 1988 |
| The cyclone degritter particularly suited for household use for receiving, degritting and discharging a water feed flow. The cyclone degritter comprises a pressurized housing containing a cyclonic degritter cartridge with a plurality of small hydro-cyclones arranged within a shell for |
| 4714049 |
Apparatus to reduce or eliminate fluid bed tube erosion |
December 22, 1987 |
| Apparatus to reduce or eliminate fluid bed erosion in fluidized bed combustion boilers by increasing the fire-side tube temperature by adding appropriately dimensioned longitudinal or circumferential fins to the inbed heat exchange tubes in the reactor. |
| 4705462 |
Process and device for improving working of liquid pumps |
November 10, 1987 |
| A pump having a pump cavity divided into a first chamber and a second chamber by a movable member, said first chamber being adapted to be filled by liquid, with the movable member displaceable between a first extreme position for which said first chamber is essentially filled with said |
| 4700636 |
Ash classifier |
October 20, 1987 |
| Apparatus is provided for withdrawing a stream of relatively static bed material from an operating fluidized bed reactor and gravity feeding it through a conduit to an exterior classifying chamber into which a downward flow of air is introduced. The airflow is turned in the classifier to |
| 4693802 |
Electrically augmented vacuum filtration apparatus for producing a dialyzed cake product |
September 15, 1987 |
| An electrically augmented vacuum filtration apparatus for dewatering a suspension of solids wherein the transport of ions into the cake product is controlled by provision of a suitable anionic solid polymeric electrolyte arranged to isolate at least one electrode from the suspension |
| 4679439 |
Method and apparatus for measuring the unsteady sedimentation potential of colloidal particles |
July 14, 1987 |
| A method and apparatus for measuring the unsteady sedimentation potential of particle in a suspension comprising: inserting at least a portion of the suspension of particles in a cell, the cell having a first electrode and a second electrode; vibrating the cell to accelerate the particle |
| 4670118 |
Electrode assembly and process for electrically augmented vacuum filtration |
June 2, 1987 |
| An electrode assembly for use in dewatering a suspension of solids in which an electric field augments an applied vacuum includes a chamber having walls comprising an ion exchange membrane on which a cake of solids is deposited and an electrode element with the chamber immersed in an |
| 4661455 |
Membrane cell culturing device |
April 28, 1987 |
| The present invention provides a novel apparatus for culturing mammalian cells, whereby a plastic housing encasing a double membrane bag or bags supplies nutrients and oxygen to mammalian cells for propagation thereof. The double membrane bag contains a first bag formed of a microfiltrat |
| 4660779 |
Multilayer precision wound filter cartridge |
April 28, 1987 |
| A method for making a precision wound tubular shaped filter cartridge wherein a filter medium comprising a roving is wound about a central foraminous core to provide a base inner and an outer helical winds of roving each provided with pluralities of both axial and circumferential flo |
| 4640775 |
Vacuum filter for the separation of solids from liquids |
February 3, 1987 |
| A horizontal vacuum tray filter having a plurality of U-shaped trays interconnected to a conveyor for movement past a filtration zone in the horizontal plane of movement wherein an endless filter cloth is disposed over the bottom walls of the trays in said horizontal plane with the a |
| 4639300 |
Method and apparatus for electrofiltration |
January 27, 1987 |
| This invention relates to a system and method for rapidly and efficiently dewatering or separating particles by electrofiltration in which the suspension of solids is first demineralized.The suspension of solids may be demineralized by electrodialysis, dialysis, filtration, diafiltration |
| 4615786 |
Non ion selective membrane in an EAVF system |
October 7, 1986 |
| A system and apparatus for dewatering a suspension of solids in a carrier liquid by means of an electrically augmented vacuum filter having an anodic electrode structure comprising an anode and a liquid impervious wall, wherein the wall is a non ion selective membrane which is permeable |
| 4614588 |
Method for sulfide toxicity reduction |
September 30, 1986 |
| A method and system for reducing the sulfur concentration of wastewater which is to be disposed of through anaerobic treatment. Wastewater high in sulfur content is fed to a reactor having a pH level less than 6, such that the sulfate and/or sulfite compounds in the wastewater are conver |
| 4604174 |
High flow electrofiltration |
August 5, 1986 |
| An electrically augmented crossflow filter device in which a feed stream containing solid particulate matter is flowed between opposed walls while a pressure differential is imposed across a first of said walls comprising a filter medium to produce a flow of filtrate therethrough in a di |
| 4602989 |
Method and apparatus for determining the zeta potential of colloidal particles |
July 29, 1986 |
| A method and apparatus for determining the zeta potential of particles in a suspension comprising: a cell containing at least a portion of the suspension of particles; a first electrode and a second electrode disposed in a cell; means for producing an electric field between the first and |
| 4581139 |
Filtrate run-back baffle for rotary drum vacuum filter |
April 8, 1986 |
| A removable baffle insert for positioning in a filtrate compartment of a rotary drum vacuum filter comprising an elongated C-shaped member positioned between a pair of compartment walls and having one arm thereof providing the ceiling of the compartment to prevent filtrate run-back d |
| 4569739 |
Electrofilter using an improved electrode assembly |
February 11, 1986 |
| A system and method for dewatering or separating particles from a liquid or a colloidal suspension which comprises the use of an electrofilter with separated, submerged electrodes wherein the electrode used for collecting the solid particles comprises an assembly of an ion-selective memb |
| 4552019 |
Method and apparatus for measuring a colloidal potential |
November 12, 1985 |
| A method and apparatus for measuring a colloidal potential are described using pulses of ultrasonic energy that are directed along a path within a liquid suspension of colloidal particles. A vibration potential is measured at at least a pair of positions along the path. The positions are |
| 4551248 |
Filter drum for rotary drum vacuum filter |
November 5, 1985 |
| A drum structure for a rotary drum vacuum filter wherein the drum comprises a pair of conical shaped support members having concentrically arranged interconnected peripheral base portions with the apexes of the support members carried by spaced cylindrical end plates which form the end w |
