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| Number | Title | Issue Date |
| 7367288 | Upper bundle cleaning system of steam generator An upper bundle cleaning system of steam generator is disclosed which can clean heat transfer tubes and a plurality of tube support plates that support the heat transfer tubes and have slots, using a cleaning device transferred along a guide rail installed to an upp... | 05/06/2008 |
| 7204208 | Method and apparatuses to remove slag A robotic apparatus for the cleaning and maintenance of coal fired boilers, which is designed to operate in the high temperature environment of the combustion gasses to effectively clean and remove slag deposits of the boiler heat transfer surfaces by use of a preci... | 04/17/2007 |
| 7162981 | System for annulus tooling alignment with suction pickup in the stay dome on the secondary side of a steam generator A system is provided for delivering tooling, suction pickup, and alignment platforms to a stay dome region of a stem generator or the tube-free lane regions adjacent to the stay dome region and includes a suction device positioned in the stay dome region of a steam ... | 01/16/2007 |
| 7086353 | Lance system for inter-tube inspecting and lancing as well as barrel spraying of heat transfer tubes of steam generator in nuclear power plant Disclosed is a lance system for inter-tube inspecting and lancing as well as barrel spraying of heat transfer tubes of a steam generator in a nuclear power plant, so that foreign substances piled up around heat transfer tubes in the steam generator are removed using... | 08/08/2006 |
| 7028926 | Sootblower nozzle assembly with nozzles having different geometries In accordance with the teachings of the present invention, a sootblower design incorporates a downstream nozzle positioned on a nozzle block body and an upstream nozzle positioned longitudinally from the position of the downstream nozzle farther from a distal end of... | 04/18/2006 |
| 7013917 | Rotary valve A high-speed, high pressure rotary valve is provided comprising a valve body, a valve element which includes a plurality of passageways therethrough that is configured to be rotatably disposed within the valve body, and means for rotating the valve element within th... | 03/21/2006 |
| 6964709 | Acoustic soot blower, and method for operating the same The sonic soot blower includes a sonic wave oscillator that oscillates sonic waves by compressed air or steam, a frequency-regulating portion that varies the frequencies of the sonic waves oscillated by the above-described sonic wave oscillator, a resonance tube tha... | 11/15/2005 |
| 6935280 | Cold water inlet for reducing accumulation of scale A cold water inlet for a tank of a water heater is provided. The inlet includes an inlet conduit configured to extend toward a flue extending upwardly through the tank. The inlet conduit includes a proximal, intermediate, and distal conduit portion, the distal porti... | 08/30/2005 |
| 6928937 | Sootblowing control based on boiler thermal efficiency optimization The present invention provides a process for the control of a cleaning system for a boiler which incorporates factors related to the overall operation and efficiency of the boiler. Current values of plant data parameters associated with the boiler furnace are compar... | 08/16/2005 |
| 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 |
| 6758168 | Method and apparatus for sootblowing recovery boiler A method and apparatus for sootblowing a recovery boiler. Sootblowers of the recovery boiler are divided into sootblowing groups, and a sootblowing interval is determined for the sootblowers. A fouling index is produced for each sootblowing group of the recovery boi... | 07/06/2004 |
| RE38542 | Upper bundle steam generator cleaning system and method An upper bundle steam generator cleaning system including a cleaning head deployment and support device receivable through a hand hole of the steam generator and including retractable cylinders which raise the cleaning head up through the flow slots to position a cl... | 07/06/2004 |
| 6736089 | Method and system for sootblowing optimization A controller determines and adjusts system parameters, including cleanliness levels or sootblower operating settings, that are useful for maintaining the cleanliness of a fossil fuel boiler at an efficient level. Some embodiments use a direct controller to determine... | 05/18/2004 |
| 6681839 | Heat exchanger exchange-tube cleaning lance positioning system A heat exchanger exchange-tube cleaning lance positioning system that includes a three axis cleaning lance positioning mechanism that is attachable to the end of a heat exchanger and that is controlled by a lance position computer controller that determin... | 01/27/2004 |
| 6672257 | Upper bundle steam generator cleaning system and method An upper bundle steam generator cleaning, inspection, and repair system including a deployment support device receivable within the steam generator to raise a cleaning device, an inspection device, and/or a tool up to the upper bundles of the steam genera... | 01/06/2004 |
| 6581549 | Sootblower lance port with leak resistant cardon joint A cardon joint is provided for mounting in a wall of a boiler to accommodate a sootblower lance and to allow the lance to be manipulated with respect to the boiler wall. The cardon joint includes a wall box having a central opening. An outer ball having a... | 06/24/2003 |
| 6543392 | Deployment system for an upper bundle steam generator cleaning/inspection device A deployment system for an upper bundle steam generator cleaning/inspection device, the deployment system including an elongated body feedable through an access in a steam generator shell proximate the tube sheet of the steam generator, the elongated body... | 04/08/2003 |
| 6425352 | Sootblowing optimization system Removal of combustion deposits from a fossil fuel boiler surface is optimized by using a sootblower to direct a cleaning medium in accordance with adjustable operating parameters against a surface of the boiler to remove accumulated deposits. Following th... | 07/30/2002 |
| 6412449 | Segmented lance assembly A lance assembly for insertion into a steam generator chamber includes a hinged support for guiding the lance within the chamber which may be stored easily in a smaller space outside the chamber when not in use. One embodiment of the support has left and ... | 07/02/2002 |
| 6325025 | Sootblowing optimization system Removal of combustion deposits from a fossil fuel boiler surface is optimized by using a sootblower to direct a cleaning medium in accordance with adjustable operating parameters against a surface of the boiler to remove accumulated deposits. Following th... | 12/04/2001 |
| 6323442 | System and method for measuring weight of deposit on boiler superheaters A method and system for measuring a weight of a deposit that forms on a tube bank independently-suspended by one or more hanger rods within a boiler are characterized by having one or more strain sensors, with each strain sensor affixed to a separate hang... | 11/27/2001 |
| 6192904 | Flexible lance for machining or inspecting a tube bottom of a steam generator A flexible lance for machining or inspecting a tube bottom of a steam generator includes a flexible metallic strip which has recesses disposed one after the other in its longitudinal direction. A flexible supply line is threaded through the recesses and a... | 02/27/2001 |
| 6170117 | Multiple rake sootblower with internal valving manifold A multiple rake sootblower reciprocates over an area to clean an entire surface using a minimum of space for the sootblower stroke. An internal valving manifold and a plurality of bushings inside of a plenum isolate the rakes from each other and operate o... | 01/09/2001 |
| 6145583 | Inspection device A device for inspecting the interior of steam generators capable of visually inspecting interior of tubes in steam generators, including upper portions steam generator tubes, tops and bottoms of support plates, wrapper-to-support plate welds, and other in... | 11/14/2000 |
| 6101985 | Water lance blower with shortened water lance A water lance blower for cleaning heating installations, wherein a water lance (6) is movably (5) arranged with its mouth on or in a hatch (2) and can blow a water jet through the heating installation, which is in operation and is flowed through with flam... | 08/15/2000 |
| 6092491 | Boiler wash A washer for the flueways of a boiler which has an adjustable collar that is inserted between the boiler hood and the exhaust pipe. The collar has an opening through which a spray nozzle is inserted. The spray nozzle is connect to a hot water supply, and ... | 07/25/2000 |
| 6073641 | Drive system for a water lance blower with a housing for blocking and flushing medium and a method for its operation A water lance blower for cleaning heating installations, wherein a water lance (6) is movably (5) arranged with its mouth on or in a hatch (2) and can blow a water jet through the heating installation, which is in operation and is flowed through with flam... | 06/13/2000 |
| 6065202 | Steam generator top of tube bundle deposit removal apparatus A deposit removal high pressure spray apparatus for removing heat conduction inhibiting deposits on U-tubes at the top of a shell and tube type of nuclear steam generator (10) tube bundle (16) by crawling along flanged outboard support beams (18) above th... | 05/23/2000 |
| 6051195 | Synthesis gas heat exchanger unit The present invention pertains to a synthesis gas heat exchanger unit with one synthesis gas radiant cooler (1), two synthesis gas convection coolers (23), one crude gas-clean gas heat exchanger (4), one crude gas-inert gas heat exchanger (5), and one dus... | 04/18/2000 |
| 6035811 | Water lance blower positioning system A water lance blower for cleaning heating installations, wherein a water lance (6) is movably (5) arranged with its mouth on or in a hatch (2) and can blow a water jet through the heating installation, which is in operation and is flowed through with flam... | 03/14/2000 |
| 5950572 | Opening that allows a soot blower lance to be introduced through a tube cage An opening arrangement in which a sliding plate accommodates a soot blower lance to be inserted into a medium-pressure gas-accommodating space through a tube cage in a boiler heated by waste heat. A soot blower box is provided with an elongated slotted ho... | 09/14/1999 |
| 5943984 | Side inlet for a water heater An inlet is provided for delivering water into a water heater through a port in its side. The inlet includes a conduit having a distal portion that extends toward a bottom of the water heater. That portion includes means for deflecting the water flow in o... | 08/31/1999 |
| 5913320 | Sludge removal system An improved remotely-operated high-pressure water-jet sludge lancing system for removing sludge from the secondary side of steam generators, the system including an end effector and a deployment system. The end effector includes two diametrically opposed ... | 06/22/1999 |
| 5836268 | Sootblower with travelling limit switch A retractable sootblower, having a movable carriage and lance tube assembly for cleaning inside surfaces of a boiler, includes a stationary starter switch for initiating operation of the sootblower and a cable disposed between the movable assembly and the... | 11/17/1998 |
| 5813370 | Steam generator lancing system A steam generator lancing system for cleaning tubes and tubesheets of a steam generator. The lancing system includes a nozzle block including at least one nozzle adapted for fluid communication with a high pressure hose. The lancing system also includes a... | 09/29/1998 |
| 5782255 | Method and device for cleaning a tube plate of a heat exchanger from inside the bundle of the heat exchanger At least two pivoting jets (55a, 55b, 55c) of cleaning liquid, each directed between two successive lines of tubes substantially perpendicular to the rows of tubes, are sent, in succession, from locations situated inside the bundle of the steam generator,... | 07/21/1998 |
| 5778831 | Sootblower lance with expanded tip A nozzle for a sootblower is used to project a cleaning agent against the internal surfaces of a boiler for removing fireside deposit. The nozzle of the present invention incorporates a passageway having a convergent segment between its entrance end most ... | 07/14/1998 |
| 5765510 | Retractable, sealed sootblower for high pressure, high temperature applications A retractable sootblower for avoiding and dislodging accumulated soot and ash. The sootblower includes an elongate housing and a blowing tube or blowing tube assembly reciprocable in the housing. The blowing tube is extended and retracted by pressurized g... | 06/16/1998 |
| 5667139 | Cleaning apparatus for heat exchange surfaces and an improved nozzle device therefor A nozzle configuration capable of handling several cleaning mediums including two sets of discharge nozzles, each of which is associated with a respective cleaning medium. The first nozzle set discharges cleaning medium fluid of relatively higher pressure... | 09/16/1997 |
| 5658361 | Apparatus for purifying hot flue gas and for recovering thermal energy therefrom Particulate-containing hot flue gas flows are flowed into a boiler having a first and a second chamber. The first chamber has a gas side and a water side. The hot flue gas flows into the gas side of the first chamber which is in heat exchange relation wit... | 08/19/1997 |
