Abstract: The aspirating liquid flow tube of a dual concentric tube assembly for a vacuum cleaner dump bucket is closed at its upper end, and is provided with opposed radial nozzles for discharging dirty liquid induced by the vacuum promoted air stream tangentially against the curved sidewall of the dump bucket dome above the ring baffle to facilitate separation of the liquid from the air stream and distribute the liquid about the full circumference of the dome sidewall prior to contact with the ring baffle to increase dump bucket capacity without introduction of liquid into the hollow riser tube leading to the vacuum source.

Abstract: The structure of a gas scrubber for large diameter conduits. It employs an axially located element that forms an annular venturi passage. This eliminates any tendency toward incomplete scrubbing of the gas stream.

Abstract: A rod type wet scrubber having two trays or decks of rods that are normally in space relation relative to the gas flow and wherein alignment of the rods is initially achieved by mounting them in a manner that will permit lateral movement and then bringing the two trays together such that the rods are interspersed in contact and accurately aligned with each other. The rods of each tray are then secured in place in their respective positions to thereafter prevent lateral movement therebetween.

Abstract: A heat transfer system for cooling water, comprising a relatively large air duct which is open to ambient air at the upstream end, where there is situated an annular, coaxial nozzle to jet hot water through a venturi tube toward the downstream end of the air duct. The high velocity stream of water draws air into the low pressure zone to intermix with the finely divided water droplets moving downstream. The water is cooled by transfer of heat of vaporization as well as by transfer from the air itself, whereby water drawn from the downstream end of the air duct is cool enough for recycling.

Abstract: An improved venturi scrubber for removing particulate matter from a gas stream. The scrubber includes ports located either at the throat at the venturi or in the divergent section for injecting gas or air into the stream being processed through the scrubber. The ports may be either a series of openings or a continuous annular opening and are connected by ducting either to the convergent section of the scrubber to receive a portion of the incoming gas stream or to a separate source of gas or air.

Abstract: A process is disclosed for quenching of the partial combustion product gas of a slagging coal gasifier containing suspended molten slag particles wherein the hot product gas of the gasifier is passed through a tubular quench zone into which a shielding gas is introduced circumferentially to form an annular layer or protective gas shield between the product gas and the walls of the quench zone and a cooling gas is injected radially to effect direct cooling of the product gas to a temperature at which the molten slag particles solidify and lose their stickiness, said protective gas shield being maintained for a sufficient distance along the axis of the quench zone to prevent contact between the quench zone walls and the hot product gas during said cooling.

Abstract: The installation comprises at least one trickling channel oriented vertically and whose cross-section diminishes from above to below. A transverse wall is arranged below the lower end of this trickling channel. The invention is applicable to the air coming from painting cabins.

Abstract: A rectangular section venturi scrubber has a double diamond, rectangular insert adjustably mounted therein with the parts proportioned to form diverging, restricted scrubbing throats of substantial length and of constant cross sectional area along their length. Water is introduced into the venturi for collecting dust in gases flowing through the scrubber.

Abstract: Apparatus for extracting, with minimal back-pressure effects, particulate matter carried by an airstream includes, in coupled sequence, a cyclone chamber for mixing the particulate-laden air with a uniformly distributed spray of water or other settling liquid, an air-flow straightening chamber, a splash-limiting basin partially filled with the settling liquid and a porous particulate collector releasably coupled to the basin portion.

Abstract: A venturi-type gas scrubber comprising two rows of parallel spaced rod contact members to dispose in a housing through which a contaminated gas stream is directed. The two rows are spaced relative to each other in the direction of gas flow and the scrubbing liquid is introduced into the stream by being directed into some of the upstream row of rod members that are in the form of hollow tubes. There are openings in these tube walls so oriented as to provide a spray that is countercurrent to the gas flow.

Abstract: Improvements in air pollution control and polluted gas effluent treatment, both processes and apparatus; Processes and devices for sequentially several times drawing a polluted gas stream against a liquid surface under a barrier approaching the liquid surface, while adding ambient air to the stream between impacts; Processes and devices for humidifying a polluted gas stream by first drawing the stream in impact against a liquid body surface, thereafter nucleating the humidified gas stream by adding ambient air thereto, and finally again drawing the now nucleated gas stream into impact against a liquid body surface to remove the polluting particulates therefrom; Single vessel and multiple vessel multi-stage processes of treating polluted gas streams by drawing same into first impacting humidification, thereafter ambient air addition-nucleation followed by further draw-through impaction.

Abstract: In an air cleaning device including a wash section wherein the wash section comprises a housing having front, rear and lateral side walls to define a passageway. Within the passageway and secured to opposite facing walls thereof is a pair of removably, adjustably arranged baffle members arranged in spaced apart relationship to form a venturi passage therebetween. Above the pair of baffle members but within the passageway and secured to a wall thereof is located a wash liquid discharge chamber arranged to discharge wash liquid downwardly onto a baffle plate member whereby the wash liquid issues across the entire width of the wash section in substantially a planar sheet of liquid to meet the contaminated air stream.

Abstract: A gas-scrubbing apparatus for treating contaminated gas with a liquid to remove particulates and other impurities. Liquid is discharged radially outwardly from a central nozzle or jet and is directed between a pair of upper and lower walls which converge radially outwardly, and then diverge radially outwardly, to define an annular venturi. Gas flowing upwardly through a central opening in the lower wall passes outwardly through the venturi where it intimately mixes with the liquid discharged from the nozzle. In one embodiment, the upper wall has a trough-shaped upper surface communicating directly with the throat of the venturi for introducing recirculated liquid into the liquid-gas mixture flowing outwardly through the venturi.

Abstract: The invention relates to smelting furnace venturi gas scrubbers of the Warkaus type in which the central nozzle is substituted by three or more nozzles which are arranged along the inner circumference of the venturi tube, in or adjacent its narrowest portion, the mouths of the nozzles being flush with the inner surface of the venturi tube.

Abstract: Dust-laden waste gases from a converter and from ancillary equipment are exhausted by respective blowers through a first and a second duct to a main and a secondary scrubbing station whence the purified gases escape through respective chimneys. The first duct is provided with two cascaded washing stages, the upstream stage being operable to throttle or block the flow of gases therethrough. An annular cowl for the interception of peripherally escaping converter gases is connected to a third duct which joins the first duct at a location between the two washing stages but is also connectable through a switching valve to the second duct.

Abstract: An improved gas scrubber is provided which is particularly suited for cleaning and cooling the exhaust gases from a diesel powered mine vehicle. The invention is embodied in apparatus including an enclosure which is partially filled with a liquid such as water. An inlet for the exhaust gases is located above the liquid level, as is also an outlet for the cleaned gases to escape. A tube connected to the inlet extends downwardly to below the water level, then changes direction and extends upwardly with constantly increasing cross section and with at least some portion of it in curvature to an open end interiorly of the enclosure and above the liquid level. One or more orifices in the submerged portion of the tube admit water droplets which are sucked into and turbulently mixed with the high velocity gases in proportion to the amount of combustion exhaust from the engine.

Abstract: An apparatus for cleaning a dirty gas stream including a scrubber throat therein, the scrubber including a plurality of elongated baffles arranged in parallel and pivotally disposed for rotational movement therein, adjacent baffles being disposed to rotate in opposite directions thereby increasing or decreasing the cross-sectional flow through area with alternating converging and diverging flow through openings.

Abstract: A gas scrubber is provided for the removal of particulates and chemical contaminants from air and other gases. The particulates and chemical contaminants are removed from gas drawn through the scrubber, by inertial separation, spraying with water or liquid chemicals, and filtering techniques. A throat section of adjustable cross-sectional area is utilized in the scrubber to provide optimum air velocity and turbulence for maximum scrubbing efficiency over a wide range of air handling capacities. The cross-sectional area of the throat is adjusted by controlling the level of the liquid in a liquid-filled sump which is provided for the spray water or liquor. Removable filter baskets of variable depth are utilized during final treatment of the air or gas being cleaned.

Abstract: An apparatus for effecting direct quench of pyrolysis furnace effluent. A quench tube sized somewhat larger in diameter than the furnace effluent pipe is provided with an upper inverted ring and an external housing surrounding the terminus of the furnace effluent pipe, the quench tube and the inlet to the transfer pipe. The housing includes a chamber for quench oil, insulation space and purge gas space. In operation, quench oil is introduced continuously into the housing chamber and over the lip of the inverted ring to flow continuously down the sides of the quench tube inner wall.

Abstract: Apparatus operating at low pressure drop and low initial velocity for removing pollutants down to sub-micron sizes from gas streams comprising a nozzle of specified dimensions within a vertical casing and an impingement means below the nozzle outlet wherein the pollutant containing gas stream passes into the upper portion of a vertical casing and through the nozzle within the casing, the acceleration and deceleration of the gas stream causing particulates to agglomerate in passing through the nozzle, impinging the agglomerates upon the impingement means, removing the liquid and particulate matter from the lower portion of the casing and separately removing the clarified gas from the lower portion of the casing. An apparatus and method is disclosed wherein 2 to 6 nozzle-impingement means stages are connected in vertical series and wherein 2 to 6 nozzles are placed in each vertical stage and 2 to 4 of the mulitple nozzle-impingement means stages are connected in series.

Abstract: A process for removing sulfur trioxide from gases wherein the sulfur trioxide-containing gas is treated with sulfuric acid in a Venturi absorber, the sulfur-trioxide laden sulfuric acid is passed in indirect heat exchange with a cooling fluid within the widening outlet of the absorber and the sulfur trioxide-laden sulfuric acid is separated from the gas phase.