Von Roll Umwelttechnik Ag

Von Roll Ag

Asea Brown Boveri Ag

Holderbank Financiere Glarus Ag

Other

Abb Alstom Power (Switzerland) Ltd.

Bang & Clean Gmbh

Von Roll Umelttechnik Ag

Hans Ruegg

Ruedi Frey

Patrick Muller

Alfred Edlinger

Beat Stoffel

Theo Rey

Norbert Kiethe

Anton Mayer

Ernst Hugentobler

Christian Steiner

Rene Vock

Christian Wieckert

John Millard

Bruno Carcer

Walter Tschantre

Stefan Forsberg

Karl Heinz Pflugl

Harald Wanger

Thomas Ungricht

Karl-Heinz Pflugl

An on-line method and a device for cleaning of contamination such as caking or slag deposits from surfaces in vessels and combustion installations by means of blasting technology. An explosive gas mixture is made to detonate in the proximity of the deposits and thereby clean the deposits from the surfaces.

Method for cleaning combustion devices

In a process for melting inorganic materials ( ) in a rotary horizontal converter or a rotary kiln ( ) by adding fuel ( ), oxygen or oxygen-enriched gases ( ) and the inorganic materials ( ) to a liquid bath ( ), solid fuel ( ) is added in piece form. The oxygen or the oxygen-enriched gas ( ) is blown at high velocity (v) onto the surface of the bath ( ), reacts with the solid fuel ( ) and releases heat in the course of this. By means of the process of the invention, high temperatures can be achieved with the use of inexpensive fuels.

Process for melting ashes, slags or glass

A method for the incineration of refuse in an incineration cylindrical rotary kiln and for treating the resulting slag from the incineration of the refuse. The method includes the steps of removing the slag or ash from the cylindrical rotary kiln in a dry state and immediately separating the slag or ash in a first screening stage into at least two fractions, including a first fraction or screen underflow having a particle size of less than 32 mm. The method includes the further steps of feeding the first fraction or screen underflow to a second classifying stage where the first fraction or screen underflow is separated into a fine function having a particle size of up to 2 mm and the further step of returning at least part of the fine fraction to an air-inlet side of the cylindrical rotary kiln for incineration of the fine fraction.

Method for incinerating refuse and for treating the resulting slag

In a process for reprocessing slag and/or ash from the thermal treatment of refuse, the refuse (1) is pyrolyzed, gasified or partially combusted in a first process step, heavy-metal-containing slag and/or ash (8) having a comparatively high carbon content being formed. Said slag and/or ash (8) is then heated in a rotary kiln (6) to a temperature below the melting temperature of the slag and/or ash (8) in a second process step, the slag and/or ash (8), prior to its discharge from the rotary kiln (6), dwelling sufficiently long in the rotary kiln (6), that the heavy metals present therein are converted into their metallic form by reduction at the carbon endogenous to the slag and the readily volatile heavy metals are transferred to the gas phase and are discharged from the rotary kiln (6) together with the flue gas (9), and finally a slag (15) depleted in heavy metals being discharged from the rotary kiln (6).

Process for reprocessing slag and/or ash from the thermal treatment of

Process and apparatus for the 3-stage treatment of solid residues from

Process for the thermal treatment of waste material

Process for cooling and cleaning flue gases

A method and apparatus for incinerating loose waste material in which the loose waste material is introduced into a furnace chamber to form a layer in the bottom of the furnace chamber. The layer of loose waste material is subjected to the direct action of technical-grade oxygen, preferably in less than stoichiometric amounts, with the oxygen fed at least at the speed of sound. The oxygen is supplied utilizing a plurality of lances distributed in the furnace chamber. Heat produced by combustion of the waste material melts incombustible constituents of the waste material. Residual unburnt combustible gases can be fed through an outlet stack to a secondary combustion chamber.

Method and apparatus for incinerating waste material using oxygen

Process for the combustion of waste material with production of thermal

A waste material, particularly refuse, is conveyed through a combustion chamber while simultaneously being mixed and is treated with a gaseous oxidizing agent. The combustion chamber comprises a rotary tubular furnace. The waste material is acted on by the gaseous oxidizing agent, with the volatile combustible constituents of the waste material forming flames with the oxidizing agent. The radiation heat of the flames frees additional volatile constituents of the waste material. The waste material freed of volatile constituents is obtained as refuse coke and the unburnt volatile constituents are obtained as combustible gas. The thermal treatment in the rotary tubular furnace can be continued beyond the freeing of volatile substances. Given an adequate temperature rise, the oxidic constituents of the slag formed are melted, and the latter can be obtained in the form of glass.

Method for the thermal treatment of waste material, particularly refuse,

A process for the treatment of solid residue from a refuse incineration plant, involving:

Process for the treatment of solid residue from refuse incineration

Waste material is conveyed in an uncomminuted state on a grate (5) through a combustion chamber (12) of a stationary furnace (10) and at the same time mixed by a thrust and shearing action of the grate (5). A gaseous oxidizing agent is introduced, for example via gas lances, into the combustion chamber (12) from above the layer of waste material (11) lying on the grate (5). The oxidizing agent cooperates with the combustible volatile substances escaping from the waste to form flames. The layer of waste is heated by the thermal radiation of the flames such that degasification occurs. The combustible gases thus freed are partially burnt. The waste material freed from the volatile substances, that is to say refuse coke, and the unburnt volatile substances, that is to say combustible gases, can be used as fuels outside the plant or within the plant. The oxidizing agent does not come into contact with the thermally stressed parts of the plant. It is thus possible to use oxidizing agents having a high oxygen content of up to 100%. This results in an enormous reduction of flue gases by up to 80%.

Process and apparatus for the thermal production of energy from waste

Dustlike and/or finely divided solids which arise in the purification of flue gases, in particular from refuse incineration plants, are subjected to a thermal treatment. In this case, the said solids are fed to a filter device along a predetermined transport path by a gas stream having at least the thermal treatment temperature. After the filtration, the solids can be subjected to a thermal post-treatment. The thermal treatment can serve to destroy halogenated, in particular aromatic, hydrocarbons, to remove ammonia or other volatile constituents.

Process for the thermal treatment of solids which arise in the

For reducing nitrogen oxides in the flue gases of a firing plant, fresh ammonia water, i.e. an aqueous solution of ammonia (NH.sub.3), is introduced into the flue gas flow. For achieving a high degree of separation of the nitrogen oxide a superstoichiometric addition of ammonia (NH.sub.3) is necessary. Most of the excess ammonia is washed out in the wet washer (6). A liquor, e.g. milk of lime (Ca(OH).sub.2), is dosed into the wash water in a connecting line (10) to a stripping column (11), so that a pH-value above 9.5 is obtained. The now physically dissolved ammonia (NH.sub.3) is desorbed from the wash water in the stripping column (11). The steam/ammonia mixture passing out of the stripping column (11) is condensed in a condenser (17) and the condensate in the form of ammonia water is admixed to the fresh ammonia water in feed line (3). As a function of the nitrogen oxide reduction, approximately 10 to 50% of the fresh ammonia water can be saved.

Process for the recovery of ammonia from flue gases

Process and apparatus wherein nitrogen oxides NO.sub.x contained in waste gases produced by combustion of fossil fuels in a firing plant are removed by reacting the waste gases with ammonia NH.sub.3 to reduce the nitrogen oxides to elementary nitrogen N.sub.2 ; subjecting the waste gases after being so reacted to wet waste gas cleaning whereby the washing water removes the unreacted ammonia (slip) from the waste gas to produce slip enriched washing water; raising the pH value of the slip enriched washing water to a value of more than 10, introducing air into the pH raised slip enriched washing water to remove the slip from the water and produce an air-slip mixture and recycling the slip into the furnace to react with waste gases to lower the amount of ammonia discharged into the atmosphere.

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Wohlen, Switzerland

Hans Ruegg