Abstract:
The present application provides a heat exchange assembly for exchanging heat between a coolant and a gaseous medium. The heat exchange assembly may include an outer jacket, a number of gas tubes positioned within the outer jacket, and a self-cleaning system positioned about the gas tubes. The self-cleaning system may include a number of chains extending through the gas tubes.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betrieb eines Elektrolichtbogenofensystems, das einen Elektrolichtbogenofen und eine an diesen angeschlossene, beim Betrieb des Elektrolichtbogenofensystems Gas aus dem Elektrolichtbogenofen absaugende Absauganlage umfasst sowie ein Elektrolichtbogenofensystem mit einem einen Absaugstutzen umfassenden Elektrolichtbogenofen und mit einer am Absaugstutzen anschließbaren Absauganlage mit einem Abgasleitungssystem. Eine ein- und ausschaltbare Fördervorrichtung fördert nach ihrem Einschalten einen Teilstrom des abgesaugten Gases in den Elektrolichtbogenofen. Das Elektrolichtbogenofensystem umfasst eine Abgasrückführung. Die Abgasrückführung weist eine vom Abgasleitungssystem oder vom Absaugstutzen abzweigendes Gasführungsleitungssystem mit einer Fördervorrichtung auf. Das Gasführungsleitungssystem ist strömungstechnisch an den Elektrolichtbogenofen anschließbar. Mit der vorliegenden Erfindung wird die zum Schmelzen erforderliche Energie während des gesamten Schmelzprozesses reduziert.
Abstract:
A process for heating a metal feedstock (31) fed in continuous to a smelting furnace (30) through a second horizontal heating section (34) through which hot discharge fumes collected from said furnace (30) pass, said fumes exerting a heating phase of said feedstock (31), characterized in that, immediately before entering said second heating section (34), the feedstock (31) is subjected to a preheating phase by heating means other than the discharge fumes collected from the smelting furnace (30). In a plant for the embodiment of said process, said different heating means are envisaged inside a first preheating section (33), which is operatively connected with said second heating section (34) by means of an intermediate fume evacuation section (35), the fumes coming from said sections (33) and (34) being conveyed to said section. Said sections (33, 34) preferably have a tunnel configuration.
Abstract:
Um das im geschlossenen elektrischen Schmelz- und/oder Reduktionsofen (1) für die Erzeugung von Eisenlegierungen, Metallen, Silizium, für Recycling-Prozesse und chemische Prozesse anfallende CO-reiche Prozessgas zu nutzen, wird dieses in einem Gasmotor (3) zum Antrieb eines Generators (4) zur Erzeugung von elektrischer Energie verbrannt. Um den Wirkungsgrad solcher Anlagen mit Gasmotoren weiter zu erhöhen, wird erfindungsgemäß vorgeschlagen, dass die heißen Verbrennungsgase des Gasmotors (3) zur gezielten Erhöhung der Eintrittstemperatur des in den Schmelz- und/oder Reduktionsofen (1) einzutragenden Beschickungsmaterials genutzt werden.
Abstract:
A furnace damper control system and method thereof including a furnace having at least one opening through which electromagnetic radiation from within the furnace may be sensed, an exhaust duct capable of receiving an exhaust gas stream emerging from the furnace, and a controllable damper capable of adjusting the pressure in the exhaust duct. A sensor is capable of sensing electromagnetic radiation through one or more of the openings of the furnace and generating a sensor signal corresponding to the electromagnetic radiation, and a processor is capable of processing the sensor signal and generating a monitoring signal responsive to a parameter of the electromagnetic radiation indicative of furnace emissions. A controller is capable of controlling the damper responsive to the monitoring signal indicative of the furnace emissions.
Abstract:
A method of operating a channel induction furnace to process a feed material and obtain therefrom at least one of a molten metal product, a vapor phase metal product and a slag product. The method involves maintaining a slag layer on the molten bath that has a thickness that is sufficient to support the feed material while minimizing heat transfer through the slag layer and minimizing the resistance of vapor phase components from transferring through the slag layer. The fluidity of the slag layer is controlled by heating the slag layer and adjusting the chemistry of the slag layer.
Abstract:
A furnace damper control system and method thereof including a furnace having at least one opening through which electromagnetic radiation from within the furnace may be sensed, an exhaust duct capable of receiving an exhaust gas stream emerging from the furnace, and a controllable damper capable of adjusting the pressure in the exhaust duct. A sensor is capable of sensing electromagnetic radiation through one or more of the openings of the furnace and generating a sensor signal corresponding to the electromagnetic radiation, and a processor is capable of processing the sensor signal and generating a monitoring signal responsive to a parameter of the electromagnetic radiation indicative of furnace emissions. A controller is capable of controlling the damper responsive to the monitoring signal indicative of the furnace emissions.
Abstract:
The invention relates to heat-and-power engineering, particularly, to the devices for solid fuel firing, processing of thermal and thermal condensing power plants ash wastes (AW) in a melted slag, bubbled by oxygenated gas, and getting refuse-to gas energy. The invention provides to increase maintainability of the furnace for fuel firing in melt (FFFM) by the development of a hearth and a hearth enclosure construction, mounting of a gas seal device along the power boiler girth at the power boiler-furnace conjunction and selection of the furnace optimal length. The FFFM hearth includes the mounting of padded caissons on the refractory masonry surface and embedded ones - into the hearth masonry at the depth of 10-12 gages of air tuyeres of embedded caissons. The mounting of the gas seal device along the power boiler girth provides to eliminate both the leak-in from atmosphere and the exhaust gases discharge.
Abstract:
A seal for a high temperature treatment vessel, particularly those common to the steel industry, has a primary purpose to prevent gases from escaping the treatment vessel. The seal is provided by a positive gas pressure curtain barrier means, a plurality of mechanical seal and a means of aspirating gases escaping past the seals for recycling into the vessel.