Abstract: In a rotating grate having a rotational-symmetrical shape having an axis of rotation which is inclined against a horizontal plane by more than 34°, and which encloses a combustion chamber for the combustion of slag-forming fuel, which is locked on a lower end and is open at an upper end and is defined by meridionally extending carrier arms that are hollow and are connected to a compression air source and are provided with blow openings directed into the combustion chamber, the combustion chamber has a spherical shape, or in the borderline case a cylindrical shape with a radially extending lower front side, the angle of inclination of the axis of rotation against the horizontal is between 36° and 46°, the carrier arms in the combustion chamber are flush with the remaining grate surface, and the inner contour of the combustion chamber encloses an angle of 90° with the axis of rotation in the area of the closed end.

Abstract: A fire-tube boiler which is suitable for operation with powdered ash-containing fuels and automatically maintains itself clean in operation, has inlet openings, widening in trumpet shape, of flue tubes in the wall which separates the boiler drum from a reversing chamber. The fire tube is so dimensioned that, with due consideration of the boiler capacity, the flue gases at the outlet from the fire tube are cooled by a safety margin to below the ash-softening point of the corresponding fuel. The number and inside diameter of the flue tubes are so dimensioned that a dynamic pressure which is not less than 40 Pa is established in them. A blast tube which blows approximately tangentially over the partition wall is arranged on the reversing chamber in order to keep the inlet openings free of deposits of ash.

Abstract: Combustion waste gases of coal dust comprising SO.sub.2 and fly ash are completely and dry desulphurized by very quickly heating up the fly ash to a high temperature which, however, is below the sintering temperature of the fly ash, and cooling the combustion waste gases to a temperature, the distance of which to the water dew point is relatively small and is below 25.degree. C. Thereby, SO.sub.2 is bound into the ash, so that the combustion waste gases become free of SO.sub.2. (FIG.

Abstract: An apparatus for the dosed incorporated of a dustlike substance into a carrier gas stream is described; said apparatus operates on the basis of a perforated disc which rotates in the dust, the passage holes of said disc are filled with the dust and are blown out in a blowing zone. Since a predetermined blowing pressure is maintained and owing to a suitable dimensioning and arrangement of the passage holes, a remarkable increase in the throughput of dust is achieved, compared with the prior known matter.

Abstract: A method is given with the help of which pulverized brown coal can be stored safely, that is, it can be made safe against self-ignition. The pulverized brown coal is mixed with at least 20% by weight anthracite dust until the particle mixture shows a uniform, black, anthracite-like color. Defined limits for the grain size of the pulverized brown coal and the anthracite dust must be observed.

Abstract: The invention concerns a process for operating a coal-dust fired power plant in environmentally sound fashion and arrangements for accomplishment of the process pursuant to the invention. The same relates in particular to the reduction of the emission of gases harmful to the environment such as NO.sub.x and SO.sub.2.A particularly surface-active coal dust is used and is heated extremely rapidly in a burner muffle before being mixed with combustion air. After combustion the flame gases are very rapidly cooled down to a temperature under 1000.degree. C. before being discharged from the burner muffle.

Abstract: A process and installation for the production of powdered, surface-active, agglomeratable, calcined material, specifically calcined lime, from a material or raw material present in the form of sludge, scum or the like such as the waste materials in the sugar industry. One specific example of the process is production of calcined lime and/or usable CO.sub.2 from waste materials existing in the sugar producing industry. The installation in which the process is carried out includes a special calcining or reaction chamber which provides parallel flow paths with a turbulent vortex zone within which the raw materials are subjected for controlled periods to desired reaction temperatures.

Abstract: A process and installation for the production of powdered, surface-active agglomeratable, calcined material, specifically calcined lime, from material or raw material present in the form of sludge, scum or the like, such as the waste materials in the sugar industry. The specific example of the process is production of calcined lime and/or usable CO.sub.2 from waste materials existing in the sugar producing industry. The process includes reacting the raw materials in a special mixing chamber under controlled time and temperature conditions, preheating the materials by using the reaction exhaust gases, obtaining calcined lime particles isolated from CO.sub.2 gases, and recycling portions of the particles to obtain complete reaction of the material. The process provides calcined lime which can be discharged in solid form or converted through further stages to lime-milk for direct use in sugar making processes.

Abstract: This invention relates to a process and apparatus for the combustion of pulverized coal, wherein the pulverized coal is introduced into a conditioned atmosphere having an overpressure, the overpressure being used to accelerate a flame jet, and wherein the flame jet is injected into an atmosphere having a temperature below the ash melting temperature of the fired coal.