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| Number | Title | Issue Date |
| 7475645 | Retractable liquor gun holder for a recovery furnace A liquor gun holder for a recovery furnace includes a rail assembly, a carriage assembly moveably mounted onto the rail assembly such that the carriage assembly is moveable longitudinally along the rail assembly, a pivot pin supported by a bearing and extending late... | 01/13/2009 |
| 7392751 | Port rodder with velocity damper A port rodder assembly for a recovery boiler includes a duct affixed to and in fluid communication with an air port of the boiler, having a hollow interior, and an air inlet opening. A cutting head is slidably mounted within the duct adjacent to the air port and is ... | 07/01/2008 |
| 7244399 | Grid construction for a fluidized bed reactor A grid construction for a fluidized bed reactor, the reactor including a reaction chamber defined by substantially vertical walls, in which a fluidized bed of solid particles is maintained, and a windbox under the reaction chamber, in a lower portion of the reactor.... | 07/17/2007 |
| 7194780 | Kiln cleaning apparatus An apparatus for cleaning deposits from the interior surfaces of a kiln. The apparatus utilizes a directed high-pressure fluid jet to remove deposits adhering to elements within a kiln. The pressurized fluid is delivered to the fluid jet through the shaft of a rotar... | 03/27/2007 |
| 7185594 | Method and apparatus for improving combustion in recovery boilers A combustion air system for a recovery boiler is described in which multiple levels of secondary and tertiary combustion air ports each have an even number of ports, with the ports on opposing walls interlaced. The air system lends itself equally well to front/rear ... | 03/06/2007 |
| 7069866 | System for controlling the flow pattern of a recovery boiler The invention relates to a system for controlling the flow field in a soda recovery boiler, said soda recovery boiler comprising at least a furnace (1), primary air ports (4) in the lower part of the furnace, so-called secondary combustion air ports ( | 07/04/2006 |
| 7006407 | Communication system for underwater use For digital underwater transmission an information sequence (17) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n potential symbols), each symbol (19) is replaced ... | 02/28/2006 |
| 6980487 | Underwater communication system In a digital acoustic transmission device in which a digital sequence (31) is electrically modulated (22) on a carrier cos ωt, the modulated carrier (23) is prefaced with at least two pulse signals (24) of known timing relative to each o... | 12/27/2005 |
| 6925969 | Boiler wall box cooling system A wall box coupled with a wall port of a combustion device is provided. The combustion device includes a wall and an interior volume defined by the wall. The wall box includes a cooling chamber surface defining a cooling chamber located adjacent to the wall port. A ... | 08/09/2005 |
| 6672227 | Arrangement for cleaning, airflow control and pushing away melt in air ports of incineration boilers The arrangement is for cleaning and controlling airflow and where appropriate pushing away melt in an air channel of recovery boilers within the paper and pulp industry. By inclining the regulating device 10 at an angle to the horizontal plane and at the ... | 01/06/2004 |
| 6652267 | Burner for the partial oxidation of liquid fuels which contain carbon The burner has at least two fuel-carrying tubes which are arranged in parallel, the distance between adjacent fuel-carrying tubes being 5 to 30 cm. Each fuel-carrying tube is surrounded by a steam-carrying tube, which at its orifice end has a supply line ... | 11/25/2003 |
| 6497230 | Air port damper An air port damper system for a recovery boiler employs plural louvers for altering the exit angle of air through an air port. Dampers are provided to enable adjustment of the flow through the device. Suitably, the device may be retracted away from the ai... | 12/24/2002 |
| 6446565 | Blast tuyere for shaft furnaces, in particular blast furnaces or hot-blast cupola furnaces A blast tuyere for shaft furnaces, includes a conical hollow main body having inner and outer casings defining a hollow space and interconnected by a tuyere nose. The outer casing is formed by a single-piece base body terminating smoothly in the tuyere no... | 09/10/2002 |
| 6422159 | Incinerator for home use An incinerator has a combustion vessel, a base trap and an afterburner. The combustion vessel has a combustion chamber, an exhaust leading from the chamber, an air intake leading to the chamber, and a gas intake leading to the chamber. Fresh air is mixed ... | 07/23/2002 |
| 6363868 | Combustors and burners with high turndown ratio Various smoke and combustible gas combustors (200, 300) are disclosed, and also disclosed are systems (100, 200) combining gas combustor with inventive burner. Such a burner (100 or 100') provides combustion of a particulate fuel such as sawdust, and many... | 04/02/2002 |
| 6260490 | Burner isolation valve for pulverized fuel systems A burner isolation valve or gate for use in the coal-delivery pipes of coal-fired power plants. Safety regulations often require that two valves be placed in the coal delivery line between a combustion chamber and an exhauster or pulverizer type deliver s... | 07/17/2001 |
| 6257156 | Wind box for a chemical recovery furnace The present document describes a wind box used in the air supply of a chemical recovery furnace, the wind box comprising a frame (1) having at least one air inlet opening (2) and at least one air supply opening (3) through which air is led from an air cha... | 07/10/2001 |
| 6192810 | Laminar flow air register A register for use in conjunction with kraft recovery boilers or bark-fired boilers utilizes a pair of shaped damper foils to reduce turbulence and induce laminar flow of air from an associated windbox through a port in the boiler. The foils are mounted f... | 02/27/2001 |
| 6055943 | Air port casting Improved air port castings are employed in a recovery boiler, eliminating the use of a crotch plate in a membrane/tube type boiler. The casting extends over the exposed portion where the membrane begins again at an air port, providing a sacrificial member... | 05/02/2000 |
| 6024028 | Protection of the air ports of a recovery boiler A method and apparatus for extending the life of air ports and nozzles in furnaces, particularly recovery boilers for burning black liquor to produce heat and a chemical melt. Apparatus is provided for feeding combustion air into a furnace having a tube w... | 02/15/2000 |
| 5839893 | Hot burning nozzle with a change pipe A device enabling air-blast nozzles to be replaceably mounted in the walls of reaction chambers, or ovens used for processing materials, in order to remove material caked or accumulated on the inside surface of the walls (2). Fitted in the wall (2) is an ... | 11/24/1998 |
| 5531189 | Automated damping port rodder The present invention uses a pivotally mounted damper to cover the port and provide damping to the boiler furnace. The damper is aligned with and superjacent the rodding mechanism and is supported intermediate the port and the pivotal mounting by a linkag... | 07/02/1996 |
| 5528999 | Air nozzle for a recovery boiler An air nozzle (3) mounted in the wall of a recovery boiler for supplying air from a supply duct (4) into the recovery boiler. The air nozzle (3) comprises a nozzle duct (7) attached to the wall of the recovery boiler and a separate nozzle part (3a) insert... | 06/25/1996 |
| 5462433 | Device for blowing preheated air into a shaft furnace The present invention relates to a device for blowing preheated air into a shaft furnace, comprising several separate tubular elements, wherein an outer shielding made of steel and an inner lining made of cast refractory concrete are connected in pairs by... | 10/31/1995 |
| 5359965 | Furnace windbox/water wall seal A furnace apparatus which includes a plurality of water walls each including a plurality of tubes, the water walls collectively enclose a combustion chamber. The apparatus includes a plurality of windboxes and each of the windboxes are disposed intermedia... | 11/01/1994 |
| 5351631 | Removable damper for chemical recovery furnace Damper apparatus for air ports of a chemical recovery furnace is mounted on a removable windbox faceplate. Damper blades extend from cantilevered arms pivoted at the forward side of the faceplate, with the damper blades being otherwise unsupported, i.e., ... | 10/04/1994 |
| 5307745 | Removable damper for chemical recovery furnace Damper apparatus for air ports of a chemical recovery furnace is mounted on a removable windbox faceplate. Damper blades extend from a cantilevered arm pivoted at the forward side of the faceplate, with the damper blades being otherwise unsupported, i.e.,... | 05/03/1994 |
| 5209657 | Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints A device is presented for injecting preheated air into a shaft furnace and comprises of a plurality of tubular elements provided with a refractory lining, which are connected to each other by a ball-and-socket articulation and an expansion joint. The ball... | 05/11/1993 |
| 5178819 | Tuyere blocks of vertical reactor furnaces A tuyere opening assembly of a vertical furnace or reactor includes at most four prefabricated elements made of moulded refractory concrete, and a lining therein of ceramized refractory keys of identical shape and size arranged therein for receiving a bur... | 01/12/1993 |
| 5178921 | Burner block assembly and material A lightweight burner block assembly includes (a) a relatively thick exterior shell, the exterior shell comprising a refractory material including fibrous alumina and silica and having an internal bore; and (b) a relatively thin, erosion resistant liner in... | 01/12/1993 |
| 5167192 | Damper controller for a chemical recovery furnace A controller for a damper in a chemical recovery furnace relieves physical engagement between the damper mechanism and an operating handle therefor when such handle is being repositioned. The damper is repositioned to prevent interference with an adjacent... | 12/01/1992 |
| 5119743 | Device for injecting preheated air into a shaft furnace The device comprises an oblique portion connected by a gooseneck, a nozzle, atuyere and a ball-and-socket joint to the wall of the furnace, in which the oblique portion comprises a tapered tube flange-mounted by its upper part onto an upper connection pie... | 06/09/1992 |
| 5088423 | Burner tile assembly A high-speed type burner tile assembly including a cylindrical mixing tile having a central through-hole, and a combustion tile having a tip portion aligned with the mixing tile. The tip portion of the combustion tile is coaxially extended into the centra... | 02/18/1992 |
| 5070823 | Port rodder with anti-drift feature An anti-drift mechanism for a downwardly oriented port rodder for cleaning a port opening of a recovery boiler. The anti-drift mechanism prevents a cutter of the rodder from accidentally drifting from a retracted holding position into the port upon the lo... | 12/10/1991 |
| 5044327 | Air/burner port An air/burner port assembly for a boiler having a water-wall and a windbox spaced rearwardly of the water-wall to form a windbox, comprises a burner and ignitor mounted in the windbox for directing and igniting fuel through a port in the water-wall. A dam... | 09/03/1991 |
| 5044934 | Warm up burner for the hearth of a circulating fluidized bed boiler An oil-burning or gas-burning warm up burner for the hearth of a circulating fluidized bed boiler. The burner has a fuel lance on the axis of the burner, a rectangular peripheral admission channel admits combustion air around the lance. Air flow channelli... | 09/03/1991 |
| 5001992 | Apparatus for regulating air flow through an air port of a chemical recovery furnace Apparatus for regulating air flow through an air port in a chemical recovery furnace. A plenum having an adjustable damper mounted inside a wind box associated with the furnace adjacent to the air port supplies and regulates the flow of air from the wind ... | 03/26/1991 |
| 4987838 | Device for injecting preheated air into a shaft furnace The device is composed of several separate elements consisting of at least one central tubular element connected, on one side, by means of a first ball-and-socket joint and a first compensator to a first connector supplying preheated air and on the opposi... | 01/29/1991 |
| 4981088 | Slag eliminator for furnace viewing system An anti-slagging apparatus for a furnace viewing system removes slag build up deposited on a closed circuit television camera lens tube by occasionally releasing a blast or large volume of air through specially designed ports surrounding the tube containi... | 01/01/1991 |
| 4940005 | Device for injecting preheated air into a shaft furnace The device is composed of several tubular elements equipped with an inner refractory lining and connected, on one side, to the wall of the furnace by means of a downpipe, an elbow, a tuyere and a nozzle and, on the other side, to a main circular pipeline ... | 07/10/1990 |
