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AssigneeRuhrchemie Aktiengesellschaft
InventorsJosef Hibbel, Ulrich Gerhardus, Volkmar Schmidt, Bernhard Lieder, Heinrich Scheve, Erwin Zerres
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The invention relates to a process and a device for the discharge of residues of ash-containing fuels occurring during gasification of coal. The hot mixture of residues and water is separated in a separating chamber, whereby the residues enter a lock vessel situated under the separating chamber. The hot water is recycled to the water bath situated under the gasification reactor. After the lock vessel has been filled with residue, the hot water in the separating chamber is cooled or replaced by cold water. The discharge of the residues is pressureless and is effected by a stream of water flowing through the separating chamber into the lock vessel. Separating chamber and lock vessel remain filled with water at all times.
In a process for periodically discharging slag containing residue occuring during gasification of ash-containing solid fuels with oxygen and/or an oxygen containing gasification agent at a pressure of 10-200 bar wherein said residue is collected in a water bath (2), passed to a lock vessel (6) which is continually filled with water from a water supply container (18) with which it is in fluid communication and following gasification and pressure reduction to 0.05 to 4 bar pressure the residue is flushed out of said lock vessel (6) by water from said water supply container (18) into a downstream collecting vessel (22), comprising passing said residue in admixture with water from said water bath initially to a separating chamber (43) disposed upstream of said lock vessel (6), said separating chamber being in fluid communication with said water bath and said lock vessel, separating said slag from said water in said separating chamber (43) and returning water separated in said separating chamber (43) to said water bath, passing said slag from said separating chamber to said lock vessel, said lock vessel (6) being connected to said water supply container (18) via said separating chamber (43) and after said lock vessel is fed with slag but before its contents are flushed into said downstream collecting vessel (22) replacing water at an elevated temperature in said separating chamber with water at a lower temperature.
An apparatus for discharging slag containing residue occuring during gasification of an ash containing solid fuel with oxygen or an oxygen containing gas comprising a solid fuel gasifier, means for feeding oxygen or an oxygen containing gas to said gasifier, a water bath in said gasifier for receiving solid or liquid slag, said water bath in fluid communication via a first valved line with a separating chamber having means therein for separating solids from water, said separating chamber in fluid communication with a lock vessel which in turn is in fluid communication with a collecting vessel via a second valved line, which collecting vessel is connected to a reduced-pressure gas network, said separating chamber being in fluid communication additionally via a ring header through which passes water separated in said separating chamber, said ring header being in the form of a closed circuit pipeline and connected via a third valved line to a conveying means disposed between a first valve and a second valve in said third valved line to said water bath, said third valved line branched by a line between said conveying means and the valve downstream thereof by a fourth valved line having a cooling means therein which interconnects with said first valved line, said ring header in fluid communication with a water supply container via a line which intersects said third valved line, said apparatus further comprising means for separating water and slag obtained in said collecting vessel and means for returning water so-separated to said water supply container via a return line.
Dependencies are inferred from the claim text.