Abstract: Method for the use of flue gas desulfurizing gypsum occurring in flue gas desulfurizing installations operated on a lime basis, characterized by mixing the flue gas desulfurizing gypsum with dehydrated natural gypsum after its partial or complete dehydration.
Type:
Grant
Filed:
July 30, 1979
Date of Patent:
September 1, 1981
Assignee:
Saarbergwerke A.G.
Inventors:
Rudolf Muller, Hans-Guido Klinkner, Gunter Culmann
Abstract: The present invention is a process for preventing incrustations of surfaces which are in contact with aqueous solutions containing material prone to crystallize by forming a thin, protective film on the surface to be protected.
Abstract: A system is provided for cooling high-temperature, high-pressure gasifiers having cooling tubes which extend vertically through the walls of the gasifier and are connected in a closed cooling water circulation system.In accordance with the invention, the cooling tubes are coated on the inside of the gasifier with a plasma or flame sprayed ceramic coating, preferably consisting of alumina, and are embedded in a ramming compound such as tamped clay.
Type:
Grant
Filed:
March 14, 1978
Date of Patent:
February 19, 1980
Assignees:
Dr. C. Otto & Comp. G.m.b.H., Saarbergwerke A.G.
Inventors:
Joachim Kummel, Heinz Dressen, Wilhelm Danguillier, Paul Gernhardt, Wolfgang Grams, Siegfried Pohl
Abstract: A system for cooling high-temperature gasifiers and method for its operation wherein cooling conduits extend vertically through the walls of the gasifier and are connected at their ends to a closed-water circulation system which incorporates heat exchangers for removing heat from the system. Boiling in the system is prevented, and good heat transfer characteristics are achieved, by maintaining a high pressure system, at least 40 bar, coupled with a flow velocity of between 5 and 7 meters per second at a maximum internal diameter of the cooling conduits of 51 millimeters. Means are provided for maintaining the temperature of the water exiting from the cooling conduits at least 10.degree. C below the boiling point at the pressure and flow rate of the system.
Type:
Grant
Filed:
December 1, 1976
Date of Patent:
July 4, 1978
Assignees:
Dr. C. Otto & Comp. G.m.b.H., Saarbergwerke A.G.
Inventors:
Joachim Kummel, Heinz Dressen, Wilhelm Danguillier, Paul Gernhardt, Wolfgang Grams, Siegfried Pohl