Abstract: The present invention discloses an apparatus for deicing the exterior of a railway vehicle that uses heated air which is blown at a railway vehicle at 5-35 m/sec and subsequently recycled for reblowing.

Abstract: In a plant for purifying contaminated air, the contaminants are transferred from the air to a liquid flowing through a spray booth through which the contaminated air also flows in intimate contact with the liquid. The liquid is then collected in a container, from which it is recirculated to the spray booth. The closed liquid circulation circuit in flow communication with the spray booth is connected to a biological cleaning step in which the contaminants dissolved and/or suspended in the liquid are decomposed and then separated. The biological cleaning step comprises a bioreactor in which the main portion of the bio-degradation occurs, and a separator, for separation of the biosludge coming from the reactor. At least part of the contaminated liquid passing through the spray booth is continuously transferred to the biological cleaning stage from which substantially the same quantity of the cleaned liquid is recirculated to the spray booth circulation circuit.

Abstract: A paint-spray chamber having a grate-like floor with an outlet for particle-laden air below said floor, said outlet comprising water reservoirs along the periphery of the spray chamber and a venturi outlet disposed centrally of said chamber between the water reservoirs. Water is continuously supplied to said reservoirs to fill the reservoirs to overflowing and cause the water to flow into said venturi so as to provide a body of water underlying the floor. The venturi is formed by opposed venturi sides converging toward the central axis of the venturi outlet in the direction of the gas flow to a venturi throat. A pair or a series of pairs of guide plates extend inwardly from said opposite venturi sides adjacent said reservoir means and converge toward one another in the direction of air flow with a greater angle of convergence than said venturi sides and terminate in one or more noise-muffling zones along said venturi axis above said throat.

Abstract: A method of absorbing sulfur oxides from flue gases in seawater, comprising adding to the seawater calcium based alkali subsequent to the absorption, and then introducing the seawater to which alkali has been supplied into a decarbonation/oxidation reactor to which an oxygen-containing gas is supplied in order to oxidize sulfur oxides in the seawater and to strip carbon dioxide from the seawater. When the seawater has been removed from the decarbonation/oxidation reactor, calcium based alkali is again added to the seawater in order to increase its pH.

Abstract: A joint system for structural panels in which the panels have an edge construction providing a U-shaped profile having a side leg spanning between the opposite surfaces of the panel, a base coplanar with one of the surfaces and a clamp leg having an inwardly projecting portion. The panels are interconnected by cover strips of U-shaped cross section having a body adapted to overlie the clamp legs of the adjoining panels. At the opposite side edges of the body, arms extend inwardly and mount locking strips which extend toward the center of the body and are adapted to engage with the inwardly projecting portions of the profile to permit the panels to be connected in endwise alignment, at right angles, or in back-to-back relation. The patent specification discloses several different configurations of the U-shaped construction and several different configurations for the cover strips.

Abstract: An air diffuser for spreading and feeding out an exact amount of conditioned air, comprising an inlet 3 and a stationary hood part 6 connected thereto cooperating with an adjustable hood part 7 for variation of a spreading or feeding gap for the conditioned air. A spring 14 is provided between both hood parts, which are kept at a selected spacing by means of an adjusting screw. Said screw extends through the adjustable hood part via an opening with large allowance, so that the adjustable hood part can be tilted such, that a certain enlargement of the spreading gap on the one side is corresponded proportionally by a corresponding diminution on the diagonally-opposite side. Adjusting the screw changes the total flow through the gap. Tilting the hood part changes the distribution of the air without changing the total flow.

Abstract: In a dust extraction system for woodworking machinery, the dust is collected by a hood over each machine and is carried by an air flow produced by a blower through a branch conduit to a manifold which is common to a number of branch conduits. The manifold is made sufficiently large that the air flow velocity in the manifold is too low to carry the dust along the manifold, and therefore the dust collects at the bottom of the manifold, from which it is removed at intervals by a conveyor, which carries the dust to a central hopper. A control system keeps the subatmospheric pressure in the manifold substantially constant, so that the number of machines served by the system can be changed without affecting the system performance.

Abstract: A device for drying a web, such as paper web. Air distribution boxes 4 are arranged on both sides of the plane 2 of a path of guidance for the web. Each one of the distribution boxes includes a line of first opening means 6 extending transversally to the direction of guidance and arranged to direct the air essentially perpendicularly towards said plane, and a line of opening means 8 essentially parallel to the line of first opening means and arranged to direct the fluid essentially along said plane. Guide means 22 direct the air issued from opening means 8 away from the line of first opening means 6 towards and along an adjoining surface portion 10 of the box on a higher level than the line of first opening means 6. Each line of the first opening means in the box on either side of said plane is located in front of said surface portion 10 of the confronting box located on other side of the plane.

Abstract: A method of highly efficiently separating preferably low contents of gaseous mercury from a gas mixture, where the gas mixture is caused to contact a solid sorbent consisting of powdered calcium hydroxide, which in an atmosphere containing hydrogen chloride is to a certain part converted to calcium chloride. The temperature of the gas mixture is between 350.degree. K. and 550.degree. K. The contact between the gas and the sorbent preferably takes place in a fluidized bed, whereafter the sorbent is separated in a dust separator. The method is suitable for use at the separation of mercury occurring in flue gases, for example from refuse incinerators or in mercury-containing gases from process industries. At experiments with flue gas from a refuse incinerator the mercury content was reduced from 200 to 5 .mu.g of gaseous mercury/cubic meter flue gas.

Abstract: In a plant for cooling heated goods, for instance cast iron, the goods is transported in a predetermined direction through one or several cooling sections (1,2,3). Through the tunnels a closed piping system (4) transports a fluid in a direction which is opposite to the transportation direction of the goods. The piping system also comprises at least one heat exchanger in which at least part of the heat from the goods is transferred to the fluid under the intermediary of a separate cooling medium which is brought in direct contact with the goods. A considerable part of the heat being emitted from the goods can thereby be transferred to the fluid and the heat energy thus taken care of can either be converted to electric energy or be directly used for heating purposes.

Abstract: A pilot valve is described for control of a pulse valve for e.g. production of pulses of compressed air. The pilot valve comprises a housing having an inlet and an outlet, a movable valve element disposed inside the housing, and means for switching said valve element between a closed and an open position, said inlet and outlet communicating in the open position. At least a portion of the interior of the housing presents in one plane a circular shape, the outlet being formed as a radial slot from this portion around at least a part of the periphery. The valve element is designed as a flexible disc which in the closed position is located in said plane to seal the slot with its outer edge at the inner side of the housing. Said means are arranged to switch the valve element to the open position by giving the disc a curved shape so that the outer edge no longer covers the slot.

Abstract: A method for refining organic material such as bark, wood shavings, wood chips, other wood waste and peat for use as a solid fuel or for gas generation in which the material after dewatering is disintegrated and dried by the flue gases passing from the heat exchange surfaces of the furnace in which the material is burned.

Abstract: The present invention relates to a connecting valve for connecting the hose of vacuum cleaning equipment into the suction duct of a built-in cleaning system. The connecting valve is positioned behind a flap cover for the suction duct opening and comprises a pair of complimentary valve elements which mate in closed position to close the duct opening, and which provide straight tubular passageway when open for accepting the tubular end of the hose of the vacuuming equipment. Each valve element is formed of a segment of a tubular pipe and is pivoted adjacent the duct opening so that it may be operated from closed position to open position by the insertion of the end of the vacuum hose into the opening. Each element is biased toward closed position so that withdrawal of the hose effects closing of the valve.

Abstract: An arrangement for the exchange of filter hoses which are arranged in parallel in a filter box which is introduced into a filter chamber where contaminated gas enters through the sides of the filter hoses and purified gas leaves through their open ends. The filter box comprises a frame in which the open ends of the filter hoses are detachably fixed. The filter box is introduceable into a special chamber for the exchange of dirty filter hoses for clean ones by lowering the filter box through an opening in the chamber until the frame rests on supporting elements arranged in the opening. The detachable ends of the filter hoses are accessible from the "pure gas side," and the filter hoses, after being detached from the frame, drop down into the bottom of the exchange chamber for collection of the dirty filter hoses.

Abstract: The transfer elements of a heat and humidity exchanger are made by forming the transfer elements in the desired configuration and of a non-hygroscopic metal such as aluminum, and treating the surfaces to produce an integral hygroscopic layer thereof. This is done by oxidizing the surface of the metal to form an oxide layer, which itself is hygroscopic, and preferably enhancing the hygroscopic properties by subsequent impregnation of the oxide with a hygroscopic material such as lithium chloride. According to one form of the method, the oxidizing layer is produced by immersing the transfer elements, in a bath such as a warm aqueous solution of sodium hydroxide, or sodium carbonate, followed by heating in humid air; in a second form of the method, the oxide layer is produced by heating in humid air, or in a water, without preliminary alkaline treatment; in a third form of the method, the oxide layer is formed in a water bath containing an oxidizing agent such as trietanolamin or hydrogen peroxide.

Abstract: A flow regulator for regulating a gas flow passing through a tubular casing containing a plurality of radial shafts, each carrying a pivotably adjustable blade and being fixedly secured at one end to said casing and at the other end to a concentric interior hub. A protruding crank on each adjusting blade is connected to an adjusting ring so that each blade is pivoted on its shaft axis when the ring is displaced.