The invention relates to an air-cooled combustion chamber wall for combustion furnaces. The combustion chamber wall comprises at least one masonry wall with a space in the middle for the passage of cooling air along the side of the wall away from the combustion chamber side. To create a simple, stable and effective structure, the invention proposes that the masonry be made of bricks, whose walls enclose at least one air duct.

1. Process for carrying out a combined gas turbine/steam turbine process in which the gas turbine process is carried out by means of a fuel gas which has been obtained from solid carbonaceous material and subsequently de-sulphurated, and the steam turbine process is carried out by means of the steam obtained upon combustion of the carbonaceous gasification residue, and in which the combustion of the carbonaceous gasification residue takes place with oxygen-containing waste gases from the gas turbine process, characterised in that the fuel gas is produced in a circulating fluidised bed by gasification of 70 to 95% weight of the carbon content in the carbonaceous material at a temperature of 900 to 1,100 degrees C, is freed of pollutants at 850 to 950 degrees C in the suspended state with calcium hydroxide, calcium oxide and/or calcium carbonate-containing solid, and is burned for the predominant part for the operation of the gas turbine to produce a gas containing at least 5% vol. oxygen and being at 1,000 degrees C at least, the combustion of the carbonaceous gasification residue being carried out under near-stoichiometric conditions with the production of process steam in another circulating fluidised bed at a temperature of 800 to 950 degrees C with oxygen-containing gases which are supplied in at least two sub-streams at different levels, which are predominantly formed from the gas turbine waste gas.

The invention relates to a method and device for feeding industrial combustion plants with wastes, in particular with secondary fuels, and to the thus produced fuel, in order to better use, in particular a secondary fuel and to obtain a low-cost usable product which can be introduced into a combustion chamber in an improved manner, especially in order to reliably avoid obstructions in ducts leading to a boiler. The inventive method consists in crushing wastes in a crushing unit, extracting crushed wastes from said crushing unit practically just prior to the introduction thereof into the boiler by means of a conveyer which is arranged in an extracting device, on a pneumatic conveyer and in transporting said wastes to the combustion chamber by means of the pneumatic conveyer.

The system has an arrangement (1) for producing hydrogen with a reformer (2) and several gas cleaning stages (3). A gas burner (5) with an exhaust gas feed (4) heats the reformer. A polymer electrolyte membrane or PEM fuel cell (6) has connections (7, 8) for feeding in oxygen and the hydrogen produced by the arrangement. The exhaust gas feed of the gas burner is connected to the oxygen feed connection of the fuel cell. AN Independent claim is also included for the following: a method of operating an inventive system.

A heat exchanger of a ventilating system includes: heat exchange plates having first air passage through which indoor air being discharged to outside of a building passes and a second air passage through which outdoor air being introduced to the interior of the building passes which are sequentially formed: first corrugation plates attached to the first air passage; and second corrugation plates attached to the second air passage, wherein the heat exchange plates are made of a paper material with numerous fine holes that are able to generate a capillary phenomenon and loess which radiates far infrared ray. Heat exchange and moisture exchange between the indoor air and the outdoor air are performed simultaneously, and a cleaning function of removing a harmful material contained in outdoor air can be carried out.

1. A contruction element for heat insulation in buildings, especially in protruding cantilever wall portions, comprising an elongate insulation element (10) made of a thermally insulating material, wherein elongate metallic reinforcing elements (20) are provided which extend substantially transversely for the insulation element (10) and which protrude in lateral direction on either side, characterized in that the insulation element (10), together with said reinforcing elements (20), is formed as an integral prefabricated element and provided, or adapted to be provided, with at least one compression element (30) being integrated into the insulation element (10) as an interconnecting (joining) core member and having dimensions corresponding to those of the insulation element (10).

A method of operating a combustion process in a cyclone burner, after start-up thereof, is provided. A fuel and a combustion gas is fed into a combustion chamber of the cyclone burner. The velocity of the combustion gas is kept between a lower and an upper limiting gas velocity. The stoichiometric condition (sub- or over-stoichiometric) is maintained by controlling the amount of fed oxygen to the amount of fed fuel. A shift is made to the other stoichiometric condition while preventing the combustion gas from obtaining a velocity outside the range defined by the lower and upper limiting gas velocity.

A method for the production of the natural gas hydrate characterized by the steps of: combining natural gas and water to form a natural-gas water system and an agent adapted to reduce the natural gas-water interfacial tension to form a natural-gas water-agent system, allowing the natural gas-water-agent system to reach equilibrium at elevated pressure and ambient temperature and reducing the temperature of the natural gas-water-agent system to initiate the formation of the natural gas hydrate.

The invention relates to a cooling system, with a cooler (1) taking up heat, for a permanently-energized synchronous motor, in particular, a motor for a locomotive. A first line (2) leads from the output of the cooler (1) to the input of a recirculation cooler (4), emitting heat to the environment. A second line (5) leads from the output of the recirculation cooler (4) to the input of the cooler (1). A first non-return valve (3), permitting flow towards the recirculation cooler (4), is arranged in the first line (2) and a second non-return valve (7), permitting flow towards the cooler (1), is arranged in the second line (5).

Feed system for gas flushing of metallurgical vessels comprises a gas pipe (12) enclosed in a refractory pipe (10) of larger internal diameter than the internal diameter of the gas pipe. The outer pipe also encloses a cooling pipe (16) with perforations, through which cool air flows. An independent claim is included for walls and floors of metallurgical vessels fitted with the gas feed system.