摘要:
The invention relates to a method and a plant for recovering material and energy from phosphorus-containing waste by means of an air-assisted smelting-gasification and/or oxygen-assisted smelting-gasification process in metallurgical shaft furnaces. In said method, the phosphorus and/or phosphorous compounds reaching the gas phase in metallurgical shaft furnaces during the method-specific recovery of material and energy from phosphorus-containing waste by means of air-assisted and/or oxygen-assisted smelting-gasification can be easily separated and be used for metallurgical material recycling processes without having to go through a complex wet gas purification process combined with an integrated quenching step to obtain cooling to about 5°C, e.g. because of organic residues contained in the waste.
摘要:
The invention relates to a method for utilizing phosphorous-containing wastes in facilities for the exclusive energy recovery of said wastes, such as mono-incinerators for sewage sludge and/or animal meal, during the co-incineration in power plants or during additional firings in cement industry furnaces or comparable furnaces of other branches of industry, in which method an installation for melt gasification of P-containing substances is integrated into existing or new facilities of said kind. Depending on the composition of the P-containing substance, said installation generates a metal melt, a lime-silico-phosphate-containing slag low in heavy metals, and a fuel gas, and the fuel gas is supplied as fuel to the facilities for the exclusive energy recovery.
摘要:
The invention relates to a method for thermal treatment and processing of waste materials of various types, consistency and composition, such as pollutant-loaded waste wood, old tyres, industrial/commercial waste, domestic waste and bulk waste and a shaft-melt gasifier for carrying out said method. The above is achieved, whereby the waste material is introduced into the high temperature zone (H), directly after burning in the shaft-melt gasifier. The organic components contained in the waste material react with oxygen here. The reaction products are sucked into the furnace along with the residual waste materials in a co-current flow. The incompletely combusted organic components of the waste materials undergo a pyrolytic decomposition. Pyrolytic coke is formed, which is burned with oxygen in the reducing/cracking zone (Z) and the raw gas sucked off between the zones (11) and (7).
摘要:
Die Erfindung betrifft ein Verfahren und eine Einrichtung zur Entsorgung unterschiedlich zusammengesetzter Abfallmaterialien, insbesondere von lackiertem und kunststoffbehaftetem und/oder mit Kunststoff und anderen organischen Verbindungen vermischtem eisenmetallischem und/oder nichteisenmetallischem Schrott, in einem koksbeheizten Schachtofen. Kennzeichnend für das Verfahren ist, daß die eingebrachten Abfallmaterialien im oberen Schachtbereich entgast und/oder vergast werden, die entstehenden staubhaltigen Gase als Kreislaufgas vollständig abgezogen werden, dann im Ofen im Bereich der Schmelz- und Überhitzungszone verbrannt werden, anschließend die glühende Koks- und Schüttsäule durchströmen, und das entstehende Überschußgas zwischen Kreislaufgasabsaugöffnung und Schmelz- und Überhitzungszone aus dem Ofen austritt. Vorteilhafterweise verringern sich die Ofenabgasmenge und die Staubemission. Der notwendige Anlagenaufwand für die Gaswirtschaft ist niedrig.
摘要:
The invention relates to an additional embodiment for the arrangement of a lower annular suction and gas relaxation chamber (12) on a coke-heated circulating gas cupola furnace for material and/or energetic recycling of waste materials having different composition as described in main patent P 196 40 497, in which suctioning of gaseous organic matter which has been completely broken down into its basic components CO, H2, H2O and CO2 and into its trace components or has been already reformed is not yet reliably prevented. According to the invention, the lower annular suctioning and gas relaxation chamber (12) is arranged below the melting and overheating zone which extends up to the plane formed by the position of the jet gas compressor (24). Said arrangement makes it possible to draw off the excess gas directly from the furnace shaft from the melting and overheating zone at high temperatures of around 2,000 °C. The excess gas is also guided through the burning coke layer of the melting and overheating zone of the coke-heated circulating gas cupola furnace. CO2 is converted to CO by lowering the temperature of the gas as a result of energy-consuming Boudard equilibrium reaction. Fluidic separation of the excess gas from process gas is simultaneously carried out.
摘要:
A process characterized by low melting costs and a reduced environmental impact is disclosed, as well as an easy-to-operate device for melting iron metallurgy materials, in particular steel scrap, in a coke-fired cupola for producing cast iron. According to the process, gas is partially drawn from the furnace at a temperature above 400 °C in the pre-heating zone and is supplied once again to the melting and overheating zone at the same time with more than 23 % oxygen. Another characteristic trait of the invention is that the partial amount of gas drawn from the furnace equals up to 70 % of the furnace gases produced during the melting process. The furnace gas supplied, in particular because of its CO content, ensures a supply of gaseous fuel which is burned with the oxygen. The reducing conditions in gas-heated cupolas are thus reinforced, in turn improving the metallurgical effects.
摘要:
A process characterized by low melting costs and a reduced environmental impact is disclosed, as well as an easy-to-operate device for melting iron metallurgy materials, in particular steel scrap, in a coke-fired cupola for producing cast iron. According to the process, gas is partially drawn from the furnace at a temperature above 400 DEG C in the pre-heating zone and is supplied once again to the melting and overheating zone at the same time with more than 23 % oxygen. Another characteristic trait of the invention is that the partial amount of gas drawn from the furnace equals up to 70 % of the furnace gases produced during the melting process. The furnace gas supplied, in particular because of its CO content, ensures a supply of gaseous fuel which is burned with the oxygen. The reducing conditions in gas-heated cupolas are thus reinforced, in turn improving the metallurgical effects.