Abstract: A sootblower system for a furnace combustion zone has two types of blower pipes. A first type is made of a high temperature resistant material, and projects a short distance vertically through the floor of the furnace into the combustion zone and has blower orifices substantially parallel to the floor. The second type of blower pipe is made of conventional metallurgical materials and the blower outlet is positioned between and extends through adjacent tubes in a membrane wall at a location proximate the furnace floor. Both types of blowers are stationary and continuously remain in position, inserted in the combustion zone. Both types are small in size and large in number and only a small number of blowers are active at any time. In operation, discrete puffs of blowing medium are forced through the blower pipes and across the furnace floor, entraining ash and particulates into the combustion gas stream, preventing small amounts of ash buildup within the furnace.

Abstract: A method and apparatus for minimizing disturbances caused by depositions on a feeding apparatus for a combustion or gasification plant. Secondary air is fed via perforated tubes 13 which by affecting the emission levels of the process with longer or shorter time intervals are inserted and withdrawn from the chamber, while being cleaned from slag, dust and other deposits outside the chamber by wire brushes 21. The combustion process may continue by using the remaining tubes while one or more are being cleaned.

Abstract: 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 cleaning head about a flow slot of the upper tube bundles; and a cleaning head mounted with the support device for directing fluid about the tubes of the upper bundles of the steam generator for directing fluid about the tubes of the upper bundles of the steam generator thereby cleaning the generator from the top down flushing deposits downward during the cleaning process.

Abstract: An automated sludge lance and method is described for cleaning sludge from tubes in a steam generator. The lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tubes. The remote control system is mounted outside the steam generator where it is readily serviceable. The automated sludge lance and method can be used in the no-tube-lane, in the annular chamber, or in combination.

Abstract: An economizer construction for use in recovering heat from flue gases is disclosed including a housing with a flue gas passage therethrough, a helically wound heat transfer coil positioned in the flue gas passage for placing a heat transfer fluid in a heat exchange relation with the flue gases passing through the flue gas passage where the heat transfer coil defines a generally vertically extending central opening therethrough, and a soot blower assembly with an elongate soot blower lance rotatably mounted in the coil central opening for directing a pressurized cleaning fluid over the heat transfer coil to periodically clean it. Different embodiments of the rotary mounting of the soot blower lance are disclosed. Also, different embodiments of the drive means for rotating the soot blower lance are disclosed.

Abstract: An economizer construction for use in recovering heat from flue gases is disclosed including a housing with a flue gas passage therethrough, a helically wound heat transfer coil positioned in the flue gas passage for placing a heat transfer fluid in a heat exchange relation with the flue gases passing through the flue gas passage where the heat transfer coil defines a generally vertically extending central opening therethrough, and a soot blower assembly with an elongate soot blower lance rotatably mounted in the coil central opening for directing a pressurized cleaning fluid over the heat transfer coil to periodically clean it. Different embodiments of the rotary mounting of the soot blower lance are disclosed. Also, different embodiments of the drive means for rotating the soot blower lance are disclosed.

Abstract: 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 cleaning head about a flow slot of the upper tube bundles; and a cleaning head mounted with the support device for directing fluid about the tubes of the upper bundles of the steam generator for directing fluid about the tubes of the upper bundles of the steam generator thereby cleaning the generator from the top down flushing deposits downward during the cleaning process.