| Patent application number | Description | Published |
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| 20100116755 | Filter press with integrated radio frequency heating - A method of separating a mixture of liquid and insoluble solids in a filter press may comprise: pumping the mixture into a chamber between two filter plates in the filter press to form a filter cake, wherein the chamber is lined by filter cloths, and wherein, during the pumping, filtrate is forced through the filter cloths and out of the chamber; heating the filter cake in the chamber, wherein, during the heating, filtrate is forced through the filter cloths and out of the chamber, and wherein the heating is by radio frequency irradiation of the filter cake in the chamber; and releasing dried filter cake from the chamber. A filter press system for separating a mixture of liquid and insoluble solids may comprise: a frame; a plurality of filter plates configured to form a stack of parallel plates, each of the plurality of filter plates being movably attached to the frame, the plurality of filter plates further being configured to form a multiplicity of chambers, each of the multiplicity of chambers being lined by filter cloths, wherein the plurality of filter plates, the multiplicity of chambers and the filter cloths are configured to allow filtrate to escape from the chambers while retaining solids from the mixture to form a filter cake; and a radio frequency heater, for directly heating the filter cake in the multiplicity of chambers. The radio frequency heating may include microwave heating, or dielectric heating by lower frequency radio waves in the range of 1 to 100 MHz. | 05-13-2010 |
| 20110186417 | DESALINATION METHOD USING FILTER PRESS - A method of water desalination in a filter press may comprise: providing a plurality of beads in a chamber between two filter plates in the filter press, the chamber being lined by filter cloths; pumping water into the chamber; heating the water in the chamber; and collecting water vapor generated by the heating. Furthermore, during the heating, the chamber may be vacuum pumped to facilitate removal of water vapor. A filter press system for water desalination may comprise: a frame; a plurality of filter plates configured to form a stack of parallel plates, each of the plurality of filter plates being movably attached to the frame, the plurality of filter plates further being configured to form a multiplicity of chambers, each of the multiplicity of chambers being formed by adjacent filter plates of the plurality of filter plates, each of the multiplicity of chambers being lined by filter cloths, wherein the plurality of filter plates, the multiplicity of chambers and the filter cloths are configured to allow water vapor to escape from the chambers while retaining salts from the water to form a filter cake; a heater, for heating the water in the multiplicity of chambers; a condenser for condensing the water vapor; and a separator for separating the beads from the filter cake after the filter cake is released from the chambers. The beads may be reused in the chambers of the filter press. | 08-04-2011 |
| 20110203999 | DEWATERING OF DRILLING MUD USING A FILTER PRESS - A method of separating a mixture of liquid and insoluble solids in a filter press may comprise: diluting the mixture; adding a flocculating agent to the diluted mixture and stirring to form a chemically processed mixture; pumping the chemically processed mixture into a chamber between two filter plates in the filter press to form a filter cake, wherein the chamber is lined by filter cloths, and wherein, during the pumping, filtrate is forced through the filter cloths and out of the chamber; heating the filter cake in the chamber, wherein, during the heating, filtrate is forced through the filter cloths and out of the chamber; and releasing dried filter cake from the chamber. During the heating, the chamber may be vacuum pumped to facilitate removal of water vapor. Furthermore, before the diluting, additional solids may be added to the mixture. The method may be used to dewater drilling mud, and mixtures of drilling mud with drill cuttings. A system for dewatering a mixture of drilling mud and drill cuttings may comprise: a mixing vessel for mixing together the drilling mud and drill cuttings to form the mixture; a filter press for dewatering the chemically processed mixture; a pump for pumping the mixture from the mixing vessel into the filter press; and a heater for heating the mixture in the filter press. | 08-25-2011 |
