B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
The installation of one or more prefabricated drains beneath the surface of sediment in a sediment pond utilizing suction or a vacuum to withdraw water from the sediment material to lower the water level down to the level of the prefabricated drains below the pond surface. Dewatering may be coupled with imparting vibrations to the material to further promote both additional dewatering and compaction of the sediment material in the pond. A suitably graded bottom ash, fly ash, sand or large-diameter-solid particle or sediment layer may be added on top of the horizontal drains to enhance dewatering of finer sediment material.
E02B 11/02 - Drainage-device-laying apparatus, e.g. drainage ploughs
F26B 5/12 - Drying solid materials or objects by processes not involving the application of heat by suction
B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 36/00 - Filter circuits or combinations of filters with other separating devices
B01D 29/11 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
B01D 43/00 - Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration
C02F 11/121 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering
C02F 11/128 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering using batch processes
F26B 9/10 - Machines or apparatus for drying solid materials or objects at rest or with only local agitationDomestic airing cupboards in the open airMachines or apparatus for drying solid materials or objects at rest or with only local agitationDomestic airing cupboards in pans or tables in roomsDrying stacks of loose material
E02B 11/00 - Drainage of soil, e.g. for agricultural purposes
3.
System and method for dewatering coal combustion residuals
The installation of prefabricated drains in a horizontal, generally co-planar pattern below the surface of the CCR with suction or a vacuum to withdraw water from the CCR material to lower the water level down to the level of the prefabricated drains below the CCR surface. Dewatering may be coupled with imparting vibrations to the material to further promote both additional dewatering and compaction of the CCR material in the pond. A suitably graded bottom ash, fly ash, sand or large-diameter-solid particle layer may be added on top of the horizontal drains to enhance dewatering of finer CCR material.
A process for treating a flue gas desulfurization discharge stream containing dissolved sulfates is presented. Soluble barium compounds, such as barium chloride or barium carbonate are added to the stream in lieu of the traditional two-step lime/carbon dioxide process. The barium compounds cause the sulfate to precipitate as insoluble barium sulfate. The barium sulfate solids settle out of the discharge stream and can be filtered from the process water. The use of soluble barium compounds eliminates the need for subsequent pH adjustment, results in lowering calcium and magnesium concentrations in the discharge stream, and decreases scaling potential in downstream equipment.
B01D 53/80 - Semi-solid phase processes, i.e. by using slurries
B02C 17/04 - Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
6.
SYSTEM AND METHOD FOR REMOVAL OF IMPURITIES RESULTING FROM THE USE OF SODA ASH IN COAL FIRED POWER PLANTS
When using soda ash reagent in an SBS injection system, various impurities from various possible sources can form suspended solid particles and also form scale that may foul the filtration screens, piping, reagent storage tanks, and instrumentation in the injection system. A system and method are disclosed in which a chelating agent cleaning process removes existing scale, or alternatively, prevents the articles and scale from forming. Various embodiments operate in batch or continuous modes or a combination of both.
patents
