Abstract: A mixing apparatus comprises two or more tubs in which mixtures can be mixed to obtain averaging of a particular property, such as density. Two recirculation lines are used. One recirculates between an initial mixing tub and a mixing inlet, and the other recirculates from the additional, secondary averaging tub(s) and the mixing inlet. Computer control responds to densities of fluids recirculated through both of the recirculation lines. In a preferred embodiment, the computer is also responsive to pressure of one of the inlet substances. In response to these measured inputs and other data entered through a data entry terminal, the computer generates control signals for controlling the inputs of both of two inlet substances. In a preferred embodiment, the apparatus and a corresponding method utilize displacement tanks both as averaging tubs and as conventional displacement tanks.

Abstract: An improved infectious waste treatment system wherein infectious waste is fragmented and converted to a liquid or liquid/sludge form and then is chemically disinfected in a precisely controlled and timed batch process. The disinfection process takes place in an airtight sealed container to insure against release of pathogenic agents into the atmosphere. The process produces a non-toxic and non-infectious liquid or liquid/sludge waste residue which can be safely released into a sanitary sewer, landfilled or otherwise environmentally disposed.

Abstract: Disclosed is a system for dispensing and supplementing a large volume of liquid for use with cell and tissue cultures. The system disclosed comprises a large volume drum having liquid contained therein. The system disclosed further comprises a first assembly for dispensing the liquid from the large volume drum. The system disclosed further comprises a second assembly for supplementing the first liquid contained in the large volume drum with the second liquid. The system disclosed may also comprise a third mechanical arrangement for mixing the first and second liquids.

Abstract: A mixing head for high pressure mixing of reactive chemicals defines a mixing chamber for receiving and mixing oppositely directed impinging chemicals and having an outlet through which the chemicals are discharged after mixing. A separate tubular nozzle assembly for each chemical is replaceably mounted in the body of the mix head and has an inlet for receiving one of the chemicals and an orifice communicating with the mixing chamber. Each nozzle assembly includes a nozzle body and an annular sleeve or ring shaped orifice member of abrasion resistant material defining the orifice and a tubular support fabricated from a non-metallic material, e.g., an internally lubricated super polyamide, snugly spacing the annular orifice member from portions of the nozzle body defining the associated passage and also interfitting with the annular orifice member in supporting relation.

Abstract: Disclosed is a system for dispensing and supplementing a large volume of liquid for use with cell and tissue cultures. The system disclosed comprises a large volume drum having liquid contained therein. The system disclosed further comprises a first assembly for dispensing the liquid from the large volume drum. The system disclosed further comprises a second assembly for supplementing the first liquid contained in the large volume drum with the second liquid. The system disclosed may also comprise a third mechanical arrangement for mixing the first and second liquids. The materials chosen are compatible with gamma irradiation sterilization process, sterile cell culture media, and standard distribution systems.

Abstract: A mixing apparatus includes a tub, an agitator disposed in the tub, a flow mixer which provides an initial mixture into the tub, and recirculating means for recirculating mixture from the tub through the flow mixer. In a particular embodiment, the flow mixer has a vertical sleeve through which a dry substance is received for mixing with a liquid input through an inlet manifold through which the sleeve extends. The flow mixer also includes a valve comprising an orifice plate, a valve plate and a body in which grooves are formed for forming jets of liquid to engage the dry substance in a downwardly spiraling circulation. Connected to the flow mixer below the valve are at least two recirculation inputs below which a diffuser is adjustably connected.

Abstract: Plug flow through a series of tanks in fluid communication is effected by the addition of radial flow impeller means to at least one of the tanks. Plug flow through the tanks allows for sufficient residence time in the series of tanks to effect complete hydration of a hydratable gel for using in well treatment operations such as fracturing, acidizing and gravel packing.

Abstract: The mixer circuit comprises a vertically oriented, open-topped mixer vessel having a cylindrical side wall terminating with a shallow conical bottom. The bottom wall forms a central bottom outlet. Recycled slurry and fresh water streams are fed tangentially to the inner surface of the vessel, thereby forming a vortex. The oil sand enters as a continuous, free-flowing stream moving along a downward trajectory; the stream impinges the vortex, wherein it is dispersed and mixed to create slurry. The slurry exits through the bottom outlet, is screened to remove oversize material, and enters a holding vessel. Part of the slurry in the holding vessel is recycled to the mixer vessel through a pipe loop incorporating a pump. The slurry is energized by the pump and functions to maintain and partly create the rapidly moving vortex that carries out the mixing and lump-disintegration actions. The balance of the slurry in the holding vessel is pumped out as product.

Abstract: An apparatus for mixing concrete which includes a tank having at least a portion thereof which permits the inside of the tank to be visually observed from the outside of the tank. An inlet is disposed in the top of the tank for inserting concrete ingredients. An outlet is disposed in the bottom of the tank for permitting the mixed concrete to be withdrawn from a chamber inside the tank. The tank includes seals for selectively sealing all openings into the chamber of the tank and an opening is provided for introducing air under pressure into a lower portion of the tank for the purpose of being able to mix the concrete using such air pressure.

Abstract: A casing string is cemented in a borehole of a well. The cement is prepared by introducing water and dry cement material into a mixing vessel. The water and dry cement material are mixed in the mixing vessel to form a cement slurry. The mixing is accomplished by agitating the slurry to cause the slurry to circulate within the vessel, and while agitating the slurry, transmitting vibrational energy into the slurry and thereby aiding in the wetting of the dry cement material in the slurry. This also aids in removing entrained air from the slurry. The slurry is then pumped into an annulus between the casing string and the boreholes.

Abstract: Apparatus for blending solid particulate material which includes a center lift or blending column with gaseous fluid under pressure supplied to the bottom of the column for entraining material in the vessel and lifting it up through the column to circulate material within the vessel. Recycle channels are provided on the periphery of the vessel for withdrawing material at various heights and supplying it to the bottom of the vessel for recirculation through the lift column. Each of the recycled channels includes a plurality of vertically spaced apart inlet openings each with a baffle positioned therein to permit material to simultaneously enter the recycle channel at more than one point along the height of the vessel. These baffles may be equipped with operators to selectively position the baffle to control the flow of material into the recycle channel. The apparatus also includes an arrangement defining a seal leg at the bottom of the vessel to ensure proper recycle of material through the apparatus.

Abstract: A closed loop feedback control for a high pressure impingement mixing system. The high pressure impingement mixing device is equipped with a circulation loop containing both a pressure sensor and a flow volume meter. Constant pressure and flow volume is achieved by continuous closed feedback loop monitoring of the pressure and flow volume to effect a change in an adjustable pump setting and servo displaceable nozzle needle. The nozzle needle adjustment allows maintaining the appropriate pressure and volume on a continuous spaces. It also allows altering component ratios and/or flow volumes during a shot in order to affect a change in material or flow characteristics of a produced part.

Abstract: A method of mixing particulate cement and water in a primary mixing vessel to form a slurry batch, includes introducing a measured quantity of water into the vessel, introducing a measured quantity of particulate cement into the vessel, agitating the water and cement in the vessel to form a slurry, and while continuing such agitating, pumping slurry from the lower interior extend of the vessel and delivering the pumped slurry to the upper interior of the vessel, at high velocity, removing slurry from the vessel for flow to an auxiliary mixing vessel for mixing with aggregate, and employing wash water to wash remanent slurry from surfaces in the primary mixing vessel for flow to the auxiliary vessel.

Abstract: There are disclosed apparatus and methods for mixing solids that are difficult to mix. The apparatus includes means for providing a slurry of the solid to be mixed to the inlet side of a centrifugal recirculating pump.

Abstract: A magnetic pump in which a fluid is driven by means of an impeller. A stator which is adapted to rotate, through the medium of a magnetic force, a magnetic rotor attached to the impeller is disposed so as to face the magnetic rotor through a non-magnetic partition wall.

Abstract: Chemicals are injected and mixed in a fluid to be treated by hydraulically creating turbulence for mixing across the cross-section of the flow path of the fluid and injecting undiluted chemical into the turbulence.

Abstract: A system for automated batch blending of materials such as liquid fertilizers is disclosed. Liquid and dry products are supplied to a product mixing holding tank by way of valve-controlled inlet lines. A control panel responsive to the weight of the material added to the holding tank regulates the operation of the valves and of a recycling pump which mixes the product. The system permits small quantities of product to be produced under automatic control.

Abstract: A dispensing system including a tank and a constant displacement pump mounted on the tank for dispensing liquid from the tank. Liquid is withdrawn from the tank via an adapter mounted in the tank bung and having two concentric tubular members, the inner of which receives a tube connected to the pump inlet. A standpipe extends downwardly from the inner tubular member so that liquid is withdrawn from lower portions of the tank. A bypass bore, containing a pressure relief valve, is formed in the pump body between the pump outlet and a recirculation port to return liquid from the pump outlet to the recirculation port when a valve on a delivery line from the pump is closed. The recirculation port is fluidly connected to the outer tubular member of the adapter to return the liquid to the tank.

Abstract: A closed loop feedback control for a high pressure impingement mixing system. The high pressure impingement mixing device is equipped with a circulation loop containing both a pressure sensor and a flow volume meter. Constant pressure and flow volume is achieved by continuous closed feedback loop monitoring of the pressure and flow volume to effect a change in an adjustable pump setting and servo displaceable nozzle needle. The nozzle needle adjustment allows maintaining the appropriate pressure and volume on a continuous spaces. It also allows altering component ratios and/or flow volumes during a shot in order to affect a change in material or flow characteristics of a produced part.

Abstract: The present invention relates to an apparatus for mixing sodium bicarbonate solutions for kidney dialysis in quantities to sufficient to supply dialysate for multiple kidney dialysis patients. The inventive apparatus consists, generally, of a fluid container operably connected to a fluid recirculation pump for recirculating fluid in the fluid container. Attached to the fluid container are an evacuation tube, an overflow tube and an input tube.The apparatus is operated by introducing medical grade water into the fluid container, recirculating the water, adding a premeasured quantity of bulk sodium bicarbonate solution and recirculating the mixture until the sodium bicarbonate solution is solubilized.

Abstract: Apparatus and methods are disclosed for intimately mixing and contacting first and second fluids for purposes of scrubbing and cleaning one of the fluids with the other. The apparatus includes a venturi mixer device having a nozzle and feed conduit for mixing two fluid streams together. In addition, the venturi mixer device has an impingement member upon which the mixed stream of fluids impinge immediately following the mixing of the streams of fluid. The venturi mixer devices are preferably arranged in a cascade arrangement with subsequent devices being spaced a vertical distance from the previous respective devices. First and second fluids are mixed together in the initial venturi mixer device. The mixed effluents from the initial and intermediate venturi mixer devices are used as the drive fluid for subsequent, respective, downstream venturi mixer devices to further mix additional second fluid to the mixed effluents.

Abstract: The apparatus comprises an enclosure for receiving ice chips and water and a specially designed and dimensioned mixer in the form of a vertical shaft passing into the enclosure and supporting two sets of four turbine blades each. Further, the interior of the enclosure includes baffles spaced radially inwardly from the interior wall to leave a small gap between the wall and each baffle. The resulting violent agitation enables the provision of "liquid ice" without any necessity to add salt as has been required in the past.

Abstract: A continuous process and apparatus for preparing a gypsum slurry of water and finely divided high purity gypsum for use in an irrigation system wherein the gypsum and water are mixed by vigorous agitation in a tank or the like. Means are provided to create a quiescent zone in the tank that extends from at least the mid-section of the tank to the upper region thereof for discharge of the slurry so that agitation of the slurry mix within the tank does not interfere with an even discharge of the slurry from the tank.

Abstract: A device for blending dust, powder or coarse particle bulk materials, having a first upper blending device with a cylindrical blending container and a connecting discharge funnel which tapers conically towards a second lower blending device. The second lower blending device having a cylindrical container and a connecting discharge hopper which tapers conically towards the bottom to form an upper and lower mass flow silo. There is a blending pipe installed in the upper blending device which extends approximately to the lower end of the upper discharge funnel. The blending pipe contains inlet openings throughout its whole length for bulk material wherein the concentrically installed blending pipe is vertically subdivided into gravity pipes arranged side by side. Each pipe contains several inlet openings arranged above one another. The blending pipe is constructed cylindrically in the lower end region with the bulk material being transported back via a conveying pipe.

Abstract: A grading decomposer apparatus for continuously decomposing a liquor of sodium aluminate supersaturated in alumina comprises a cylindrical-conical tank for containing the liquor, having an upper cylindrical portion and an overflow generally peripherally disposed in the upper portion. A centrally disposed tubular element passes from above into the upper portion of the tank; the tubular member terminates in the cylindrical portion of the tank below the overflow. The apparatus also includes an off-take from the lower portion of the tank to an outlet; liquor is recycled from the lower portion of the tank to the upper portion within the tubular element and below the overflow, and liquor is introduced into the upper portion of the tank within the tubular element and below the overflow. A static disperser is disposed within the tubular element, the liquor feed and the recycled liquor inlet in order to create a feed and tranquilization zone within the tubular element.

Abstract: The apparatus for mixing multicomponent plastics, in particular polyurethane, has a steadying attachment 1 which is arranged at the outlet orifice 12 of a mixing head 10. The steadying attachment is equipped with a plurality of lamellae 3 which are movable in the region of the emerging mixture of components and run in the direction of flow of the said mixture. Advantageously, the lamellae can be moved forward and back in a guide housing which has webs 2 which occupy the space between the lamellae and thus ensure cleaning. Steadying is achieved by greater friction with the wall and an increase in the outflow cross-section.

Abstract: A continuous precess and apparatus for preparing a gypsum slurry of water and finely divided high purity gypsum for use in an irrigation system wherein the gypsum and water are mixed by vigorous agitation in a tank or the like. Means are provided to create a quiescent zone in the tank that extends from at least the mid-section of the tank to the upper region thereof for discharge of the slurry so that agitation of the slurry mix within the tank does not interfere with an even discharge of the slurry from the tank.

Abstract: An apparatus for reaction according to the present invention includes a horizontal-type reactor having first and second portions and a liquid circulator for circulatorily feeding a liquid from the first portion of the reactor, through the second portion of the reactor which is spaced apart from the first portion of the reactor in the direction of axis of the reactor. The reactor includes stirring blades on a stirring shaft whereby the liquid can be stirred in the rotational directions of the stirring blades of the horizontal-type reactor, while it is stirred in the axial direction thereof by the liquid circulator, thereby enabling the liquid to be stirred uniformly throughout the interior of the reacting apparatus without damaging surface renewal effects on a vapor-liquid interface.

Abstract: A slaker includes a substantially straight, circular sidewall, a substantially flat bottom, and a top. A solid and a liquid feed inlet are disposed at the top of the vessel and an outlet is disposed at the bottom of the vessel. Apparatus is provided for mixing the solid and the liquid within the vessel at high speed and separate apparatus is provided for sweeping the bottom and sidewall of the vessel at low speed. The mixing apparatus and the sweeping apparatus apply substantially only horizontal forces to the solid and the liquid being mixed within the vessel. The slaker further includes apparatus for recirculating at least a portion of the solid and the liquid being mixed within the vessel which flows through the outlet and apparatus for discharging the resultant mixed solid and liquid from the slaker.

Abstract: The preparation of adhesive compounds for mineral fiber felts, involves combining and mixing several constituents in the liquid state. These constituents are taken to a preparation container (12) using one or several conduits (13) the number of which is smaller than the number of constituents, with each conduit (13) being connected by one or several valves (10) to constituent feed equipment, with each valve (10) controlling the sequential introduction of a constituent into a conduit (13), with a mass flow meter-type device being placed on each conduit (13), downstream from the valves (10), with the compound prepared subsequently passing from the preparation container (12) to a utilization circuit.

Abstract: A method and apparatus for decomposing a sodium aluminate liquor supersaturated with alumina, obtained from alkaline action on bauxite by the Bayer process, is initiated by introduction of alumina trihydrate seed, thereby forming a suspension. The suspension is fed in at the top of a non-agitated reactor described as a "decomposer", and removed from the bottom of the decomposer; the speed at which the suspension moves downwardly is regulated at 1.5 to 10 meters per hour. The apparatus comprises a cylindrical-conical reactor which is fitted with an arrangement for feeding in the suspension at the top, and with an arrangement for taking out the suspension at the bottom. In one embodiment of the apparatus the suspension is taken from the base of the decomposer through an internal tube, with air injected into the bottom of it, is raised to the level of the top of the decomposer and is then sent downstream.

Abstract: The recirculating beverage dispenser unit comprises a cooling unit, a carbonation unit, an inlet connection between a source of fresh water and the cooling unit, a fresh water valve and spigot, a delivery conduit coupling the fresh water valve and spigot to the cooling unit, at least one mixing valve and spigot coupled by a conduit to the carbonation unit and coupled by another conduit to a source of pressurized syrup, and a pump and other conduits for circulating carbonated water from and to the at least one mixing valve and spigot to and from the carbonation unit. The carbonation unit is mounted in the cooling unit and has a refrigerant carrying conduit coiled therearound in parallel relationship with a carbonation unit water inlet conduit. A spiral baffle is positioned around the carbonation unit to direct fresh water coming into the cooling unit around the parallel coiled tubings. Syrup carrying tubings extend through and are coiled about an inner surface of the cooling unit.

Abstract: A blender wherein the fluids to be blended are compelled to flow through a bed of loosely-associated buoyant bodies.

Abstract: An apparatus and method for reacting dilute concentrations of delicate bioorganics or other reactants without creating microconcentrations of reactant during the reaction process. The apparatus mixes reagents inside of Y-connector with flowing solution from a solution reservoir. The reagents are introduced through a stopcock controlled infusion port at the center of the Y-connector. Solution and pressurized gas are each supplied to one of the three legs of the Y-connector and the resulting mixed solution from the third leg of the Y-connector is lifted by bubbles of the pressurized gas to return to the solution reservoir. A gaseous separation unit is placed inside the solution reservoir wherein the bubble lifted and mixed solution is forced through a permeable membrane enclosed by a perforated bulb to return to the reservoir.

Abstract: An extrusion apparatus for the production of mixtures of molten synthetic material includes a gear pump which is provided in the flow of molten material. The gear pump comprises a housing and two meshing gear pump wheels. The line joining the centers of the two wheels extends at right angles to the central longitudinal axis of the hollow cylinder. Outlet and inlet openings are formed in the cylinder of the extrusion apparatus which lead directly into the gear pump housing into regions which are, respectively, upstream and downstream of the gear wheels. The major surfaces of the gear wheels are disposed horizontally relative to the central longitudinal axis of the hollow cylinder.

Abstract: A high pressure mixing head for mixing reactive components in reaction injection molding includes a mixing chamber discharging into a quieting chamber and an injection valve for injecting reactive component into the mixing chamber. Recirculation passages for the reactive component are provided in the mixing chamber and internally of the injection valve. The recirculation passage internally of the injection valve is selectably opened and closed as is the outlet from the injection valve into the mixing chamber. Both the injection valve outlet and the recirculation passage internally of the injection valve are selectably throttleable.

Abstract: A transportable mixer consisting of a double bottomed load body 3 for a change-load vehicle has the space between the bottoms divided into longitudinal compartments and the upper bottom consisting of a screen plate. To each compartment 11, 12, 13 via a switching mechanism 20, there is connected a hose 14, 15, 16, 21, 22 to a pump 23. After water is added, the compartments are subjected with the aid of the switching mechanism to alternating pressure and suction, whereby the material loaded into the body is slurried from below and can be pumped out 24, 25 to the desired location. The screen plate retains coarser contaminants, e.g., stones or sticks. The load body can float and be towed on lakes, but can also be made in the form of a boat with a pump, switching mechanism and its own motor for driving and mixing. The body can be used to make use of old deposits of lime sludge for liming of lakes and soil, for industrial use of fly ash and similar waste materials etc.

Abstract: A high pressure mix-head for use in reaction injection molding systems includes a full cross section plunger and a piston valve assembly selectively positioned in response to recirculation and pour cycles to control flow through recirculation passages formed on the O.D. surface of a mix-head sleeve.

Abstract: In the case of a mixer head for reactive mixing of two or more plastics material components (A,B) in a mixing chamber (6), the mixture components are fed under the pressure simultaneously and conjointly into the mixing chamber (6) of the mixer head via a dosing valve (12, 14) in each case during a delivery stage. During a recirculation stage, the plastics material components are pumped around in a circulatory flow flowing through the dosing valve and through a recirculating valve (13, 15). To assure that even small delivery volumes per unit of time may be discharged evenly, the dosing valve (12, 14) and the recirculation valve (13, 15) are constructed as pressure valves and connected in series one behind the other, in such a manner that only the dosing valve or the recirculation valve is switched to the throughflow condition.

Abstract: An apparatus and method for mixing water and a water-soluble emulsion polymer by providing the optimum amount of mixing energy required for the polymer to effectively dissolve the polymer in the water without causing the polymer molecules to shear into smaller polymer molecules. The apparatus includes a pump means, a static mixing means and a mixing chamber means. A first circulation means connects the pump means to the mixing chamber means. A second circulation means connects the pump means to the static mixing means and further connects the static mixing means the mixing chamber means. A third circulation means connects the static mixing means to the mixing chamber means. Additionally, a flow control means selectively circulates a combined stream of the water and the polymer alternatively through the first circulation means, the second circulation means or the third circulation means. The method of using this apparatus is also disclosed.

Abstract: In a stirring device of liquid material, of circulation type comprising a return pipe inserted in a stirring tank, and a feeding pipe connected to bottom portion of the stirring tank, so that the liquid material fed through the feeding pipe is returned to the return pipe, an expanded part having inner diameter larger than that of the return pipe is provided at top end of the return pipe, and plurality of holes having the total opening diameter larger than the lateral sectional area of the return pipe are bored on both sides of outer circumferential portion of the expanded part. Two reverse circulation streams in the horizontal direction are formed within the circulation tank, and the liquid material is circulated through the feeding pipe and the return pipe, thereby the stirring is performed well without involving the excessive air.

Abstract: The treatment of a fluid containing a high concentration of particulate matter is enhanced by preventing the accumulation of particulate matter which falls from solution in the lower areas of the treatment vessel. The foregoing is accomplished by withdrawing fluid having a relatively low concentration of particulate matter at the axis of the vessel and subsequently reinjecting the withdrawn fluid as a jet or jets directed downwardly and tangentially to the wall of the vessel in the vicinity of the bottom thereof.

Abstract: An apparatus is provided for introducing a mixture of dry catalyst and a hydrocarbon liquid into a polymerization reactor vessel. The apparatus comprises a enclosed mixing tank with rotating mixing blades and a rotatable shot valve spaced below the mixing tank. The shot valve can be rotated from a first position in communication with an opening in the lower portion of the mixing tank to a second position in communication with a hydrocarbon feed conduit that provides hydrocarbon liquid to the polymerization reactor vessel. A bypass conduit is provided for introducing hydrocarbon liquid from the hydrocarbon feed conduit into the mixing tank wherein the interior of the mixing tank is maintained at the same pressure as the hydrocarbon feed conduit.

Abstract: A fluid agitating apparatus includes a housing having an inlet at an open lower end thereof, and an outlet at an open upper end thereof, with a flow passage disposed through the housing communicating the inlet and the outlet. The flow passage is preferably circular in cross-section and has a minimum diameter at a throat thereof. The diameter of the flow passage increases continuously from the throat toward both the inlet and the outlet. A vertically upward directed nozzle is located in the flow passage below the throat for inducing flow of fluid from a body of fluid in which the housing is submerged into the inlet and upward through the flow passage. A tangentially directed nozzle is disposed in the flow passage above the throat for inducing a swirling flow in the fluid flowing upward through the flow passage. This creates a swirling vortex type flow exiting the outlet of the housing which provides agitation of the fluid in which the apparatus is submerged.

Abstract: The present invention relates to a method and apparatus for enhancing the quality of a foam, such as may be employed in industrial cleaning operations, petroleum well servicing operations, and the like. Foam from a foam generator is introduced into a foam separator comprising a pressure vessel, preferably having an apertured horizontal separator plate therein, a discharge line at the top thereof, and a drain line at the bottom thereof. As foam enters the separator, the foam will pass upward through the apertured separator plate, any liquid remaining below. The liquid then enters the drain line and is reinjected into the liquid line feeding the foam generator, preferably by use of an eductor. The foam is removed from the separator through the discharge line, and put to its intended use.

Abstract: A device for obtaining high-quality mixtures of solids and liquids extending to the colloidal system or to coagulation and employed to treat water or to introduce gases into liquids, wherein the device includes an intermediate tank that has at least one charging aperture at the top, that tapers downward, that the medium flows through in a helical vortex subject to gravity, and that empties into a receiving tank.

Abstract: In a rotary drum spray grainer there is provided a solid product material exit at the same end as the inlet hot air so that air classification of the solid product material according to size is achieved while the solid product material passes counter-current to the inlet hot air as the solid product material exits the drum.

Abstract: A device for preparing high-quality mixtures of a solid and a liquid extending to a colloidal system, for treating water or for introducing gases and liquids. The device has a mixture-receiving tank equipped with a motor-powered mixer that has a drive shaft provided with mixing elements. The mixing elements rotate at a peripheral speed ranging from 60 to 500 m/sec during an initial interval of the time taken to process a mixture of a solid and a liquid. Controls are provided that can reduce the peripheral speed of the mixing elements to a minimum in accordance with the viscosity of the mixture of a solid and a liquid. The minimum speed can range from to 20 to 60 m/sec and is maintained constant up to the end of the preparation time. The device can be operated discontinuously or continuously.

Abstract: The present invention is directed to a sifting device that is attached to a granulating apparatus. The sifting device includes a disk valve which can be shut, allowing the sifting device to be cleaned apart from the granulating apparatus, without detaching the sifting device from the granulating apparatus.

Abstract: Particulate materials are blended in a vessel provided with a plurality of vertically extending conduits therein. The vessel comprises a downwardly converging frustoconically shaped bottom wall which defines the lower region of the vessel. The conduits are provided with a plurality of longitudinally extending compartments having openings within the upper region of the vessel. The lower ends of the conduits and the compartments therein extend through the bottom wall, each communicating via a corresponding connecting conduit with a solids outlet at the open bottom of the bottom wall. At least one drain conduit communicates between a corresponding opening in the bottom wall and a corresponding compartment at a location below the bottom wall. A baffle is disposed within the vessel separating the upper and lower regions and comprises a downwardly converging inverted generally conical portion spaced above the bottom wall and defining therebetween a downwardly converging annular passage.