Abstract: Device for controlling the particulate emission from coal-fired boilers including a cyclone type primary separator between the boiler and the stack and a bag filter coupled in side stream relation to the cyclone separator such as to shunt and departiculatize up to about 20% of the gas stream entering the cyclone. The shunted gas is drawn from below the tube sheet of the cyclone separator, filtered through the bags and returned to the stack. Means are provided to control the temperature of the shunted gas within defined limits corresponding to the acid dew point of the gas and the thermal degradation temperature of the filter media.

Abstract: A separator for a pneumatic conveyor system having fixed wall and a movable wall jointly defining a chamber of greater crossection than a conduit supplying a particulate carrying airflow. An inlet discharges the airflow into the chamber and into impingement with the movable wall to initiate particle separation.

Abstract: An environmental enclosure or clean room composed of a structural frame which supports a flexible transparent plastic film which defines a sealed chamber or room. Air is introduced into the chamber through a two-stage filter system and is exhausted through a filter duct. Located adjacent the chamber is a small entry compartment, and the entry compartment has sealed doorways leading to the exterior and to the interior of the sealed chamber respectively. To inspect objects in the sealed chamber, the operator enters the entry compartment and puts on a hermetically sealed suit that is normally stored in the compartment. With the operator sealed within the suit, the entry compartment is sterilized and the operator can then enter the main chamber. The suit has a provision for receiving air from the outside and for discharging air from the suit to the exterior of the chamber.

Abstract: A separator is described which includes an elongate vessel defining a chamber having a wall therein dividing the vessel into a gravity chamber and a filter chamber with the gravity chamber communicating with an inlet for receiving a contaminated gas stream containing foreign suspended particles and the filter chamber communicating with an outlet for discharging gas substantially free of foreign particles. A strainer-diffuser member having a conical side wall is inside of the gravity chamber and connected to the inlet whereby the conical side wall forms a bore converging longitudinally of the direction of gas flow from the inlet, said side wall having a plurality of holes with inner edge portions protruding inwardly in the bore and forming barriers to the flow of liquid particles over the inner surface of the conical side wall so that liquid accumulates and is jetted through the holes in liquid drops that fall to the bottom of the gravity chamber, the gas flowing through said holes into the gravity chamber.

Abstract: An apparatus and method for controlling the quality of the air in a specific environment including a base portion having a plurality of air purification means. The base provides support for an upwardly extending central tower having a plurality of air inlet openings which are shielded from the weather by protective covering means. The tower is covered by a roof. On entering the tower, the content of the air is monitored. A fan means creates an air flow path through the air inlet openings, downward through the tower to the air purification means in the base, through any one of the plurality of air purification means before being vented to the outside environment through air outlet openings. The air is monitored again after being filtered to determine the amount of pollutants. If the amount of pollutants in the air is below a predetermined level, the air is vented to the outside environment by retaining an air outlet gating means in its open position so that the purified air can pass to the outside.

Abstract: An inlet flue system for conducting particulate-containing gases to the inlet nozzles of a multiplicity of electrostatic precipitator chambers comprises an elongated plenum located generally above the nozzles. The plenum is substantially entirely open at the bottom, and the inlet ends of the perimeter walls of branch ducts leading from the open bottom define a series of outlet openings from the plenum. The open bottom construction leaves the plenum substantially free of upwardly facing surfaces where particulates can settle.

Abstract: A gas-liquid contact system for absorption of gaseous contaminants in an absorptive liquid where contact is attained by controlled flow relation between the gas and liquid forming a fluidized liquid mass for intimate contact between gas and liquid.

Abstract: Apparatus for separating a gas mixture into components of different molecr weights includes two laterally spaced tubular members with a plurality of pairs of sections extending between the tubular members. The sections of each pair combine to form a flow passageway with the adjacent edges of the sections defining nozzles. The pairs of sections are arranged to form a cluster of star-shaped members. Each star-shaped member is formed of four pairs of sections with each pair extending perpendicularly to the adjacent pairs. Adjacent star members have a common pair of sections. At the junction point of the four pairs of sections in each star-shaped member, a separation space is provided into which the nozzles are directed.

Abstract: A purifying system is disclosed for the removal of small particles of impurities from a gaseous mixture flowing in a conduit, including a venturi connected in series in the conduit, a liquid injection device for introducing jets of liquid to produce a liquid mist pattern extending transversely within the venturi to moisturize the small particles of impurities, and a regulator operable in response to the pressure differential across the venturi for adjusting the effective cross-section of the venturi and/or the operation of the injection device, thereby to maintain the pressure differential across the venturi at a predetermined value.

Abstract: Phthalic anhydride is recovered from gases in a multiple heat-pipe exchanger system, one or more for condensing phthalic anhydride from gases containing vapors thereof and one or more simultaneously melting out the condensed phthalic anhydride solids, the exchangers being switched in alternate cycles to melt out from the surfaces of the exchanger tube ends on which the phthalic anhydride solids were first accumulated, and to condense phthalic anhydride solids in the exchanger or exchangers from which the phthalic anhydride was cleared by melting out.

Abstract: An industrial loader vehicle, handling both wet and dry materials, has a single engine driving the vehicle to a pick-up site, powering all of the components to load the vehicle at the site, driving the vehicle to an unloading site and dumping the materials as desired at the unloading site. A powerful blower develops a high velocity air stream through a pick-up inlet conduit and a collector chamber tiltable on the vehicle for easy dumping of the collected material. A swingable and tiltable boom mounted on top of the collector presents the conduit for easy access to material located around and above the vehicle. The high velocity air stream sweeps the material through the conduit into the top of the collector chamber where it drops to the bottom of the chamber. The blower and surrounding environment are protected from materials entrained in the air stream by bag filters and cyclone separators mounted on the front end of the collector to tilt therewith.

Abstract: A method is disclosed for operating a cement kiln plant in which impurities in the form of alkalis are present in vapor form in the hot dust laden gases generated in the kiln. According to the method, a portion of the hot dust laden kiln gases are directed upwardly through a first riser pipe which communicates with the kiln exit gas opening and thereafter the dust particles are separated from the gases and directed to the bottom portion of a second riser pipe having its lower end open to the atmosphere. Relatively cold atmospheric air is directed upwardly through the second riser pipe so as to contact the kiln dust particles separated from the by-passed kiln gases of the first riser pipe thus permitting the kiln dust particles to be cooled by the cold air while causing the air to be heated and providing its further use e.g. in a preheater.

Abstract: A gas conduit delivers gas to an electro-precipitator at an angle to the direction of gas flow through the precipitator. Projections are provided in the conduit adjacent the inlet to the precipitator to increase the thickness of the turbulent zone of the gas boundary layer; this urges gas towards upstream regions of the inlet of the precipitator, and thereby enhances even distribution of the gas across the inlet.

Abstract: A cyclone separator assembly includes a conveying pipe for conveying a carrier gas and solids conveyed thereby along a flow path extending in a rectilinear direction. A diagonal wall extends across the conveying pipe in a direction which is diagonally inclined with respect to the rectilinear direction. A plurality of cyclone separator units are located adjacent the diagonal wall. A plurality of branch pipes, one each for each cyclone separator unit, convey carrier gas and solids from the conveying pipe to the cyclone separator units. Each branch pipe has a first end connected to the diagonal wall and a second end connected to a respective cyclone separator unit. At least an initial length portion of each branch pipe, taken from the first end thereof, extends in a direction substantially parallel to the rectilinear direction of flow of the carrier gas and suspended solids within the conveying pipe.

Abstract: A bin for pneumatically collecting paper chips comprises a chamber for receiving a stream of air containing paper chips and for collecting the paper chips. The chamber has inlet and exit ports so positioned as to cause a downward current of air to thereby compact the paper chips collected therein and means in the interior of the chamber for separating substantially all of the paper chips from the air stream and for collecting the separated paper chips in a lower portion of the chamber. The bin may also include means for opening a portion of the chamber to allow the collected chips to be removed from the chamber.

Abstract: An apparatus and method are provided for controlling airborne contaminants, odors and plume opacities. The apparatus and method of the present invention controls airborne contaminants which are submicron in size or greater and which are contained in a gas stream in high number concentrations. Submicron aerosol emissions, odors, and plume opacities are controlled by subjecting the gas stream in which they are contained to staged pollution control system. The first stage or inline convergence tube module, nucleates micron and submicron airborne contaminants contained in the gas stream which is being moved through the first stage at about 2,500 feet per minute or greater by contacting the contaminants with countercurrent aerosol-liquor screens having a minimum generation velocity of at least 5,000 feet per minute. The second stage or modified venturi sump module collects some of the larger nucleated contaminant droplets from the first stage.

Abstract: Disclosed is an air cleaner for use in an internal combustion engine. The air cleaner has an air filter element and a secondary air filter element therein. Secondary air is fed into the exhaust system of the engine from the air cleaner via the secondary air filter element and a reed valve for promoting the oxidation of unburned HC and CO components in the exhaust gas. A partition is disposed on the circumferential wall of the casing of the air cleaner and is arranged so as to extend along approximately half of the circumferential wall. A secondary air passage is formed between the partition and the circumferential wall. The secondary air filter element and the secondary air inlet are disposed in one end of the secondary air passage. The other end of the secondary air passage opens into the atmosphere. A plurality of holes are formed on the partition and are equiangularly arranged along the circumferential wall.

Abstract: A wet scrubbing apparatus including a housing with a fluid flow inlet and a fluid flow outlet and a plurality of contactor beds disposed therein. Each contactor bed has an inlet and an outlet in communication with the fluid flow inlet and fluid flow outlet, respectively, of the housing and each of the contactor beds includes a damper assembly pivotally disposed within its inlet. As the gas flow rate through the apparatus changes, individual contactor beds can be removed from or brought onto stream by closing or opening selected damper assemblies.

Abstract: Stack gas is first passed through a coarse-particle separator and then a prescrubbing tower. Then this gas, which is under pressure, is passed through a pair of Venturi washers. The output side of one of the washers is connected directly to a droplet separator at the output of the system. The outlet of the other Venturi washer is connected through a turbine driving an electric generator and having its output side in turn connected to the droplet separator. The control body of at least the washer which is connected directly to the droplet separator is adjustable so as to maintain a constant back pressure in the system at the blast furnace from which the stack gas comes. The Venturi washer connected to the turbine is set up to pass at least four times as much of the gas as the other Venturi washers so that most of the gas passes through the turbine, undergoing a pressure drop that is transformed into the work of driving the turbine and generates electricity.