Abstract: A waste gas purification apparatus having an elongated vertical hollow furnace shaft adapted to receive pebbles therein with a waste gas inlet at the lower end with a pebble discharge means at said lower end. At the top of the shaft is a narrow exhaust gas duct with a pebble feed chute, a pebble charge device and a pebble recirculating tube extending from the discharge hoppers to the charge device. A blower is coupled to the gas inlet for force feeding waste gas through said gas inlet. At the upper end of the shaft is an inactive travel zone. Between the inactive travel zone and the lower shaft is an intermediate shaft with a temperature control chamber in parallel with said intermediate shaft. Pebbles move downwards in the shaft from the inactive travel zone to the discharge hoppers and are recirculated to the upper end while waste gas is fed to the lower end and travels up through the shaft, a portion of the gas passing through the temperature control chamber, the clean gas leaving the upper end.

Abstract: Apparatus and process for continuously pyrolyzing or gasifying a particulated carbonaceous feed material in which preheated heat-containing bodies or pebbles are admixed with the feed material in a stratified manner to form a downwardly moving columnar reaction mass, with a remaining portion of the pebbles substantially devoid of any feed material disposed in a surrounding layer relative to the reaction mass. Gas is continuously passed transversely through the reaction mass and surrounding layer in a manner to sweep the gaseous pyrolysis reaction products out of the reaction chamber, and wherein the layers of pebbles surrounding the reaction mass serve to effect a deposition of carbonaceous residue, preventing encrustation and fouling of the reactor system.

Abstract: A method and apparatus for heating articles, such as eyeglass frames, includes a bed of heat retentive beads supported above a plenum chamber by a mesh or screen. Heated air is delivered to the plenum chamber at low velocity and high volume for flowing upwardly through the bed for heating the same. The air is directed through the phenum chamber by bodies which act as baffles as well as a heat sink.

Abstract: A continuously regenerating granular filter operable at high temperature and pressure includes a filter chamber with a gas inlet and gas outlet. A filter bed in the chamber located between the gas inlet and gas outlet is adapted to hold a filter medium and permit gas to flow therethrough. The filter bed includes inlet means and outlet means for enabling the filter medium to move through the filter bed. The filter also includes filter medium cleaning means for cleaning the filter medium. Filter medium transport means operates to transport the filter means from the outlet means, through the cleaning means and to the inlet means.

Abstract: Improvements relating to cement manufacture wherein a unique method and a plant for practicing the method are disclosed for removing at least a portion of gaseous compounds containing alkalis, chlorine or sulphur from the exit gases of a rotary kiln in which cement raw meal is burnt to cement clinker with a view to subsequent cement manufacture. The method comprises the steps of dividing the hot exit gases from the rotary kiln into a main gas flow and a separate divisional flow and directing the main flow through a suspension preheater for preheating cement raw meal prior to feeding the raw meal into the kiln. A plurality of individual relatively cool solid condensation bodies are directed to pass through the divisional flow under the influence of gravity to permit the alkalis, chlorine or sulphur to condense on the surface of the bodies and the condensed compounds are removed from the bodies for redirecting them into the separate divisional flow.

Abstract: A glass making furnace having a preheater and recycling structure including a tubular housing having a lower gas receiving stack section, a top in the form of an inverted cone, a glass batch pellet containing intermediate section, having a lower portion over the cone and about the intermediate section, gas ports in the side of the cone, shield means over the ports, a discharge valve in the lower portion below the cone part, a hot gas stack extending over the upper portion of the pellet section, a fan or hot gas ejector at the top of the stack, a damper above the fan or hot gas ejector connecting with a pressure controller within the furnace for maintaining the pressure in the furnace slightly above atmospheric, an inlet valve outwardly of the upper portion of the pellet section to control the entrance of the pellets, a regenerator on each side of the melting section and port and burner means communicating with each regenerator, a reversing valve connected with the regenerators and the melting section, and a p

Abstract: A glass making furnace having a preheater and recycling structure including a tubular housing having a lower gas receiving stack section, a top in the form of an inverted cone, a glass batch pellet containing intermediate section, having a lower portion over the cone and about the intermediate section, gas ports in the side of the cone, shield means over the ports, a discharge valve in the lower portion below the cone part, a hot gas stack extending over the upper portion of the pellet section, a fan or hot gas ejector at the top of the stack, a damper above the fan or hot gas ejector connecting with a pressure controller within the furnace for maintaining the pressure in the furnace slightly above atmospheric, an inlet valve outwardly of the upper portion of the pellet section to control the entrance of the pellets, a regenerator on each side of the melting section and port and burner means communicating with each regenerator, a reversing valve connected with the regenerators and the melting section, and a p