Method and apparatus for improved removal and retention of radioactive particulates from fluids
AssigneeVrd, LLC
InventorRobert VARRIN
Life of this patent
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Abstract
A method and apparatus for improved separation and containment of radioactive particulates from liquids by filtration. The improvements are achieved by utilizing more than one stage of filtration to remove radioactive particulates from a fluid. The first stage of filtration is designed for high liquid flowrate, low differential pressure across the filter medium, and reversibility of flow through the medium to facilitate backwashing. The second or more stages of filtration receive the backwash flow and captured particulates from the first stage at a lower flowrate, but at high pressure using a high-pressure pump configured between the stages.
Claims29
A filter apparatus for filtering particulate materials found in aqueous liquids or solutions comprising:
- a first filter configured for low differential pressure (DP) at high flowrate;
- a second filter configured to accommodate high DP at a low flowrate;
- a pumping system to move the liquids or solutions through and between the first and second filters;
- and
- a periodic regeneration system that regenerates the first filter and pumps resulting particulate-laden effluent through the second filter.
A method for retention of particulate materials found in aqueous liquids or solutions comprising the steps of:
- pumping the aqueous liquid or solutions through a first filter configured to accept high flow and low differential pressure (DP);
- pumping the aqueous liquid or solutions through a second filter configured to accept high DP at low flowrate;
- and
- regenerating the first filter and pumping the resulting particle laden effluent through the second filter.
Dependencies are inferred from the claim text.