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| Number | Title | Issue Date |
| 6759022 | Flue gas desulfurization process and apparatus for removing nitrogen oxides An apparatus and process for removing acidic gases and NOx from flue gases produced by utility and industrial plants. The process and apparatus convert NOx, and particularly nitric oxide, to nitrogen dioxide, which is then reacted to form a valuable byproduct. The p... | 07/06/2004 |
| 6638342 | Process and facility for removing metal contaminants from fertilizer streams A process and system for producing fertilizers with reduced levels of contaminants, and particularly a flue gas scrubbing process and facility that produce a fertilizer byproduct which is treated to remove heavy metals originally present in the scrubbed f... | 10/28/2003 |
| 6550751 | Gas-liquid contactor with liquid redistribution device A gas-liquid contactor for removing gases and particulate matter from flue gases produced by processing operations of the type carried out in utility and industrial plants. The contactor is generally an open spray absorber having a spray tower (110) whose... | 04/22/2003 |
| 6277343 | Flue gas scrubbing method and apparatus therefor An apparatus and process for removing acidic gases, such as sulfur dioxide, hydrogen chloride and hydrogen fluoride, from flue gases produced by processing operations of the type carried out in utility and industrial plants. The apparatus is generally a g... | 08/21/2001 |
| 6254843 | Process for the reclamation of calcium sulfite produced by a calcium-based FGD system A method of producing calcium sulfate with a flue gas scrubbing facility having a gas-liquid contactor that uses a calcium-based slurry to absorb sulfur dioxide from a flue gas containing acidic gases, wherein a byproduct containing calcium sulfite precip... | 07/03/2001 |
| 6221325 | Process for controlling ammonia slip in the reduction of sulfur dioxide emission A wet flue gas desulfurization process for removing sulfur dioxide from flue gases. The process utilizes an ammonium sulfate scrubbing solution containing free dissolved ammonia as the reagent for the desulfurization process to produce ammonium sulfate as... | 04/24/2001 |
| 6214097 | Flue gas scrubbing apparatus A gas-liquid contactor is provided for removing gases and particulate matter from flue gases, such as those which are produced by processing operations of the type carried out in utility and industrial facilities. The gas-liquid contactor includes a tower... | 04/10/2001 |
| 6202854 | Air classifier for particulate material An apparatus and process for removing fine particles from sand and other particulate material. The apparatus is generally an air classifier (10) that combines gravitational and aerodynamic forces to classify sand at 10 mesh and finer. According to this in... | 03/20/2001 |
| 6187278 | Process for controlling ammonia slip in the reduction of sulfur dioxide emission A process is provided for removing sulfur dioxide out of gases by feeding the gases into a scrubber, where they are counter-currently contacted with a descending solution containing ammonium hydroxide and ammonium sulfate so that the sulfur dioxide is sor... | 02/13/2001 |
| 6152308 | Mobile classifier for aggregates A trailer mounts a first unit having an aggregate classifier and a pair of cyclones for pivotal movement between a generally horizontal storage position on the trailer and a generally vertical upright operational position on the trailer. A second unit hav... | 11/28/2000 |
| 6090357 | Flue gas scrubbing method An flue gas scrubbing apparatus and process by which flue gases are contacted by a contact medium while traveling rapidly upward through a passage, such that the contact medium is fully entrained in the upward-flowing flue gases. The gases and the entrain... | 07/18/2000 |
| 5779999 | Method for scrubbing flue gases A method for scrubbing flue gases utilizing a spray tower for removing acidic gases and particulate matter from flue gases produced by processing operations of the type carried out in utility and industrial facilities. The spray tower is equipped with a t... | 07/14/1998 |
