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4441437 Process for thermic treatment of sludges, particularly treatment of clarification sludges
NEW
PATENTS
4381844 LID SEAL FOR NUCLEAR WASTE CONTAINERS Ferdinand H Bondy .
A folded gasket formed of a length of flexible fabric-like material is disclosed as being disposed between juxtaposed surfaces at the juncture of the lid periphery to a container mouth to adapt the container to withstand the rigors of transport, storage and burial as in the case of the nuclear waste material and the like.
A method of and an apparatus for the treatment of radioactive waste water from a nuclear electricity-generating power plant. The radioactive waste water containing soluble solids, usually boric acid, is concentrated by evaporation according to the invention to a solids concentration above that which will form a saturated solution at room temperature, whereupon the resulting concentrate is introduced into a storage vessel and cooled therein to room temperature. Solids precipitate and sediment in this vessel and water is decanted from the sediment and recycled to the evaporator where the process is repeated. The process allows the amount of waste in terms of the original material treated which must be stored for a given prolonged period, say between one half and three quarters of a year, for radioactive decay prior to packaging of the waste to be significantly reduced by comparison with earlier systems.
4441437
4440673 METHOD OF AND APPARATUS FOR THE TREATMENT OF RADIOACTIVE WASTE WATER FROM NUCLEAR POWER PLANTS
PROCESS FOR THERMIC TREATMENT OF SLUDGES, PARTICULARLY TREATMENT OF CLARIFICATION SLUDGES Gerhard Moskau, Saarbruecken Dudweiler, Federal Republic Of Germany assigned to Saarberg-Fernwarme GmbH
Rainer Ambros, Norbert Brenner, Jurge Fischer, Biblis, Federal Republic Of Germany assigned to Rheinisch-Westfalisches Elektrizitatswerk AG
In a process for the utilization of the heat content of combustible components in sludges, in particular in clarification sludges, the sludge, which still contains a proportion of water, is burnt in a pressure-tight furnace. The resulting steam and exhaust gases are conducted through heat exchangers and a thin layer evaporator, and the exhaust heat and heat of condensation effect, in one or more stages, a heating and thickening of the sludge to be burnt. Pressure-drop machines can be driven by the excess pressure of
NEW PATENTS
the exhaust gases, steam circuits and liquid circuits.
4442014 USE OF ESTERS OF SULFONIC ACIDS AS ANTI-SLUDGE AGENTS DURING THE ACIDIZING OF FORMATIONS CONTAINING SLUDGING CRUDE OILS James R Looney, Lee A McDougall assigned to Exxon Research & Engineering Co
A sludge cleaning lance advancing apparatus includes a frame having a lead screw rotatably disposed in the frame. An electric stepping motor is connected to the frame and a belt and pulley drive is connected between the stepping motor and the lead screw for rotating the lead screw upon rotation of a shaft of the stepping motor. A lance carrier has an internal screw thread engaging the lead screw, and the lance carrier and lead screw are so arranged and constructed that the lance carrier is moved longitudinally relative to the lead screw as the lead screw is rotated relative to the lance carrier. A lance is carried by the lance carrier. A handwheel is attached to the lead screw for manually rotating the lead screw to initially position the lance. An alignment rod is provided to aid in this initial positioning.
4447332
An anti-sludge agent useful for acid stimulated hydrocarbon containing formations is an ester of sulfonic acid, e.g. monoethoxylated dodecyl benzene sulfonic acid, preferably used in combination with from 0.1 to 2 parts by weight of a surfactant.
FUEL SLUDGE TREATMENT METHOD, ESPECIALLY FOR LEADED GASOLINE STORAGE TANK SLUDGE
4444667
Robert W Crisman, Dominick DeAngelis assigned to Mobil Oil Corporation
FLOCCULANT FOR SLUDGES Hans Burkert, Friedrich Brunnmueller, KarlHeinz Beyer, Michael Kroener, Hans Mueller, Ludwigshafen, Federal Republic Of Germany assigned to BASF Aktiengesellschaft Sludges are flocculated by the addition of a polymer which is prepared by the homopolymerization of N-vinylformamide in the presence of a free-radical polymerization initiator to give a poly-N-vinylformamide, followed by hydrolysis of from 10 to 90% of the formyl groups in the poly-N-vinylformamide.
4445465 SLUDGE LANCE ADVANCING APPARATUS
A sludge treatment technique adapted for separating volatile liquid hydrocarbons and/or water from sludge solids in a horizontal enclosed tank having a supported bed of filter particles. Liquids are permitted to drain and evaporate under controlled conditions and a removable top closure permits exposure of sludge solids to ambient U-V radiation and weathering conditions whereby lead-containing sludge is detoxified to environmentally acceptable levels.
44486% Audis C Byrd, Bradley Todd, William Pattison assigned to Halliburton Company
PROCESS FOR RECOVERING AND RECYCLING COAGULANT PRESENT IN WATER TREATMENT SLUDGES A R White assigned to U S Environmental ducts Inc
Pro-
PATENTS
4381844 LID SEAL FOR NUCLEAR WASTE CONTAINERS Ferdinand H Bondy .
A folded gasket formed of a length of flexible fabric-like material is disclosed as being disposed between juxtaposed surfaces at the juncture of the lid periphery to a container mouth to adapt the container to withstand the rigors of transport, storage and burial as in the case of the nuclear waste material and the like.
A method of and an apparatus for the treatment of radioactive waste water from a nuclear electricity-generating power plant. The radioactive waste water containing soluble solids, usually boric acid, is concentrated by evaporation according to the invention to a solids concentration above that which will form a saturated solution at room temperature, whereupon the resulting concentrate is introduced into a storage vessel and cooled therein to room temperature. Solids precipitate and sediment in this vessel and water is decanted from the sediment and recycled to the evaporator where the process is repeated. The process allows the amount of waste in terms of the original material treated which must be stored for a given prolonged period, say between one half and three quarters of a year, for radioactive decay prior to packaging of the waste to be significantly reduced by comparison with earlier systems.
4441437
4440673 METHOD OF AND APPARATUS FOR THE TREATMENT OF RADIOACTIVE WASTE WATER FROM NUCLEAR POWER PLANTS
PROCESS FOR THERMIC TREATMENT OF SLUDGES, PARTICULARLY TREATMENT OF CLARIFICATION SLUDGES Gerhard Moskau, Saarbruecken Dudweiler, Federal Republic Of Germany assigned to Saarberg-Fernwarme GmbH
Rainer Ambros, Norbert Brenner, Jurge Fischer, Biblis, Federal Republic Of Germany assigned to Rheinisch-Westfalisches Elektrizitatswerk AG
In a process for the utilization of the heat content of combustible components in sludges, in particular in clarification sludges, the sludge, which still contains a proportion of water, is burnt in a pressure-tight furnace. The resulting steam and exhaust gases are conducted through heat exchangers and a thin layer evaporator, and the exhaust heat and heat of condensation effect, in one or more stages, a heating and thickening of the sludge to be burnt. Pressure-drop machines can be driven by the excess pressure of
NEW PATENTS
the exhaust gases, steam circuits and liquid circuits.
4442014 USE OF ESTERS OF SULFONIC ACIDS AS ANTI-SLUDGE AGENTS DURING THE ACIDIZING OF FORMATIONS CONTAINING SLUDGING CRUDE OILS James R Looney, Lee A McDougall assigned to Exxon Research & Engineering Co
A sludge cleaning lance advancing apparatus includes a frame having a lead screw rotatably disposed in the frame. An electric stepping motor is connected to the frame and a belt and pulley drive is connected between the stepping motor and the lead screw for rotating the lead screw upon rotation of a shaft of the stepping motor. A lance carrier has an internal screw thread engaging the lead screw, and the lance carrier and lead screw are so arranged and constructed that the lance carrier is moved longitudinally relative to the lead screw as the lead screw is rotated relative to the lance carrier. A lance is carried by the lance carrier. A handwheel is attached to the lead screw for manually rotating the lead screw to initially position the lance. An alignment rod is provided to aid in this initial positioning.
4447332
An anti-sludge agent useful for acid stimulated hydrocarbon containing formations is an ester of sulfonic acid, e.g. monoethoxylated dodecyl benzene sulfonic acid, preferably used in combination with from 0.1 to 2 parts by weight of a surfactant.
FUEL SLUDGE TREATMENT METHOD, ESPECIALLY FOR LEADED GASOLINE STORAGE TANK SLUDGE
4444667
Robert W Crisman, Dominick DeAngelis assigned to Mobil Oil Corporation
FLOCCULANT FOR SLUDGES Hans Burkert, Friedrich Brunnmueller, KarlHeinz Beyer, Michael Kroener, Hans Mueller, Ludwigshafen, Federal Republic Of Germany assigned to BASF Aktiengesellschaft Sludges are flocculated by the addition of a polymer which is prepared by the homopolymerization of N-vinylformamide in the presence of a free-radical polymerization initiator to give a poly-N-vinylformamide, followed by hydrolysis of from 10 to 90% of the formyl groups in the poly-N-vinylformamide.
4445465 SLUDGE LANCE ADVANCING APPARATUS
A sludge treatment technique adapted for separating volatile liquid hydrocarbons and/or water from sludge solids in a horizontal enclosed tank having a supported bed of filter particles. Liquids are permitted to drain and evaporate under controlled conditions and a removable top closure permits exposure of sludge solids to ambient U-V radiation and weathering conditions whereby lead-containing sludge is detoxified to environmentally acceptable levels.
44486% Audis C Byrd, Bradley Todd, William Pattison assigned to Halliburton Company
PROCESS FOR RECOVERING AND RECYCLING COAGULANT PRESENT IN WATER TREATMENT SLUDGES A R White assigned to U S Environmental ducts Inc
Pro-