Abstract: The aim of the invention is to devise a flue gas purification system which allows the use of only one absorber even for large systems. The flue gas purification system according to the invention comprises a fluidized-bed reactor having a flue gas inlet unit and a flue gas outlet unit, a nozzle unit being mounted downstream of the flue gas inlet unit. Said nozzle unit is provided with nozzles, said nozzles having different cross-sections.

Abstract: The aim of the invention is to devise a flue gas purification system which allows the use of only one absorber even for large systems. The flue gas purification system according to the invention comprises a fluidized-bed reactor having a flue gas inlet unit and a flue gas outlet unit, a nozzle unit being mounted downstream of the flue gas inlet unit. Said nozzle unit is provided with nozzles, said nozzles having different cross-sections.

Abstract: The invention relates to a gas filter system having a plurality of tubes being suspended at one end at a carrier plate in a filter chamber that is flowed through by gas, said tubes having a lateral surface made from a filter material, said tubes being flowed through radially from the outside to the inside by a gas to be filtered, and guiding the gas filtered in this manner to a collecting space formed above the carrier plate, wherein openings formed by the tube ends for accommodating the carrier plate are disposed in a circular surface of the carrier plate.

Abstract: A flue gas purification device includes a receptacle, which has an absorption zone, through which the supplied glue gas can flow in an essentially horizontal direction.

Abstract: A device provides the purification of flue gas comprising a scrubbing liquid sump divided into several basins and a pump device, which pumps the scrubbing liquid from at least one basin of the scrubbing liquid sump to scrubbing liquid nozzles.

Abstract: The present invention relates to a device for the purification of flue gas comprising a scrubbing liquid sump divided into several basins and a pump device, which pumps the scrubbing liquid from at least one basin of the scrubbing liquid sump to scrubbing liquid nozzles.

Abstract: A flue gas purification device comprising a scrubbing liquid sump (16), which comprises: an oxidation device (24) having at least one pipeline (21) and oxygen outlets (22) provided therein for introducing oxygen into said scrubbing liquid sump (16), and circulation means (28) for circulating the scrubbing liquid present in said scrubbing liquid sump (16) inside said scrubbing liquid sump (16), characterized in that said oxygen outlets (22) of the at least one pipeline (21) of said oxidation device (24) have a diameter of least 9 mm.

Abstract: A flue gas purification device comprising a receptacle, which has an absorption zone, through which the supplied flue gas can flow in an essentially horizontal direction.

Abstract: An apparatus for removing SO.sub.2 from flue gas treats the hot flue gas with a sump liquid to quench the flue gas and saturate it with water while concentrating ammonium sulfate in the recycled liquid. The gas is then scrubbed in a packed scrubbing zone with a solution of ammonia water, untreated recycled ammonium sulfite and ammonium hydrogen sulfite, and ammonium sulfate solution from an oxidizer to which a partial stream of the scrubbing liquid is fed.

Abstract: SO.sub.2 containing flue gas is scrubbed with a scrubbing solution made up from ammonia water, untreated ammonium sulfate scrubbing solution recycled from the bottom of the scrubbing zone and ammonium sulfate solution formed by oxidizing a portion of the recovered ammonium sulfite scrubbing solution. The ammonium sulfite/ammonium sulfate mixing ratio is maintained at 15:1 to 3:1. The ammonium sulfite containing scrub liquid in combination with aqueous ammonia and an ammonium sulfate solution which has undergone oxidation can have an unusually high sulfur dioxide absorption capacity while minimizing the formation of aerosols.

Abstract: A nozzle arrangement in which the nozzles have a scrubber, especially for flow gas desulfurization, are laid in accordance with the following: (a) liquid concentrations of a component to be absorbed from a gas stream scrubbed in the column are measured above a plane of the nozzle assembly at N locations of a grid of equal area elements of a cross section of the column; (b) the N concentration values are compared with a predetermined value; (c) upon deviation of a measured concentration value from the predetermined value, a position of at least one of the nozzles is varied by selection of a length and location of an intermediate pipe section connecting the one of the nozzles to a respective branch pipe laterally thereon; and (d) repeating (a) through (c) until the concentration values measured above the plane are approximately equal except for at a wall region of the column.

Abstract: A nozzle arrangement for a scrubbing column for a flue gas in desulfurization, in which the scrubbing column has a sump, a baffle-free zone above the sump and a nozzle arrangement above the absorption zone. The nozzles, preferably by selective connection of intermediate pipe sections are connected to a branch pipe system extending from a distributor. Flow density profiles are formed in predetermined cross sectional planes of the scrubbing column by the spray cones of the nozzles. In each of these cross sectional planes, the flow density profiles of different spray cones are superimposed on one another. The flow density profiles of different cross sectional planes are superimposed upon projection of them onto a one of the planes to form a flow density complete profile in this one plane over the entire cross section of the scrubbing column.

Abstract: The CaCO.sub.3 content of a scrubbing suspension, especially for a desulfurizing apparatus for flue gas is measured by injecting an acid into a constant mass flow of the suspension circulating along a bypass and measuring the pH before and after such injection. The change in pH is compared with reference measurements and used as a basis for calculating the CaCO.sub.3 concentration.

Abstract: A scrubbing tower and process for flue-gas desulfurization uses a device for introducing additives like lime and limestone to the reaction zone of the scrubber by feeding those additives to a recirculating system recirculating the liquid through the sump. The recirculating system can also be used to withdraw the suspension from the column whose sump is cylindrical with a flat bottom. Recirculated liquid is introduced close to this bottom by the recirculating pump.