Abstract: An improved multi-fuel burning method and apparatus having means for regulating the fuel-air mixture passing therethrough and including four separately controlled passageways delivering the air necessary for combustion and transport of the fuel while reducing the formation of nitrogen oxides.

Abstract: A sealable multimetallic sleeve for a rapid repair of a degraded tube caused by a detrimental chemical attack on the outside surface of the tube within and in a vicinity of a tube sheet in a steam generator, and the method for sealably inserting the sleeve in the degraded tube spanning the region of the degradation. The sleeve includes an inner member with equivalent mechanical properties of the degraded tube and an outer member metallurgically bonded to the inner member and resistive to caustic intergranular chemical attack causing tube degradation. The sleeve has an expanded portion at one end for positioning in the tube within the tube sheet and a multiplicity of grooves in and adjacent to the other end of the sleeve and braze material contained in the grooves.

Abstract: An insulating and slag inducing composition comprising a mixture of Kaolite aggregate and appropriate amorphous quenched slag. The mixture is applied to the exposed surface of molten metal to induce slag formation and thermally insulate the molten metal.

Abstract: A sealable multimetallic sleeve for a rapid repair of a degraded tube caused by a detrimental chemical attack on the outside surface of the tube within and in a vicinity of a tube sheet in a steam generator, and the method for sealably inserting the sleeve in the degraded tube spanning the region of the degradation. The sleeve includes an inner member with equivalent mechanical properties of the degraded tube and an outer member metallurgically bonded to the inner member and resistive to caustic intergranular chemical attack causing tube degradation. The sleeve has an expanded portion at one end for positioning in the tube within the tube sheet and a multiplicity of grooves in and adjacent to the other end of the sleeve and braze material contained in the grooves.

Abstract: An explosive welding device is disclosed for securing sleeves within a tubular fluid conveying conduit. The device comprises a shatterable cup member, explosive material secured within the cup, a means for detonating the explosive material and a means for releasably securing the device in position within the sleeve by remote tooling.

Abstract: An improved spherical swivel joint assembly that substantially connectedly seals consecutively disposed conduit sections while allowing simultaneous angular and lateral joint displacement due to forces exerted at the joint during the transport of fluid therethrough.

Abstract: A method of burning a coal-water slurry capable of being retrofitted to oil and gas fired industrial and utility steam boilers or as original equipment in new units using essentially pure oxygen, oxygen-enriched air or hydrogen-oxygen mixtures as the atomizing fluid in a burner atomizer.

Abstract: A method of sealing leaking steam generator tubes without substantially restricting the fluid flow area by explosively welding a cylindrical sleeve over the degraded area of the tube. The sleeve has a wall thickness of approximately 0.010 to 0.040 inches and a length of about 1.5 to 4.0 inches, the weld occurs over the entire length of the sleeve.

Abstract: A start-up system for once-through boilers including the reduction of minimum flow during start-up to 15% full load by the use of multi-lead internal ribbed tubing to the enclosure tubes in the high heat input zones, the use of a variable pressure by-pass stop valve in the main flow path, a pressure reducing means in the by-pass system and two steam spray attemperators from the flash tank or separators. The first steam attemperation is to the outlet of the secondary superheater and the second to the outlet of the reheater.

Abstract: A single drum all-welded boiler system is disclosed for a furnace having a combustion chamber and a convection pass connected to the combustion chamber in a transition area, comprising a superheater in the transition area, an economizer in the convection pass and a boiler between the superheater and the economizer. The boiler and economizer can be made of a plurality of modules each comprising several tubes welded at the top to an outlet header and at the bottom to an inlet header.

Abstract: A new and improved design of a pulverizer air throat for low-pressure drop, reduced erosion and improved flow distribution.

Abstract: A pulverized fuel delivery system for a blast furnace in which pulverized coal is delivered in dense phase fluidized form into the blast furnace from gas pressurized tanks that are placed in communication, one at a time, in cyclical sequence with a penumatic transport means. The tank gas pressure is regulated in accordance with the blast furnace wind rate to control the weight flow rate of pulverized coal into the furnace and the transport gas flow rate is regulated in accordance with the fuel weight flow rate to maintain a prescribed transport gas flow rate per pound of coal delivered to the furnace.