Air and water purification using continuous breakpoint halogenation
AssigneeUnited States Filter Corporation
InventorsRoy Martin, Mikel Anthony Ferri
Life of this patent
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Abstract
A process for optimizing the rate of oxidation using halogen, e.g. chlorine donors to prevent the accumulation of undesirable chlorinated by-products. The feed rate of a chlorine donor is controlled for maintaining a desired ORP, the rate of oxidation is sufficient to prevent the accumulation of the undesirable by-products. Treatment removes the by-products from the water and surrounding air by maintaining continuous breakpoint halogenation conditions.
Claims4
A process for removing volatile halogenated compounds including chloramines and/or bromamines from the air and treating a body of water in an indoor aquatic facility comprising:
- disposing an oxidation-reduction potential (ORP) sensor in fluid communication with a body of water within said facility;
- continuously monitoring said body of water's ORP;
- comparing the monitored ORP to a set-point value calculated to be within an effective range to permit oxidation of said volatile halogenated compounds, wherein the effective range of ORP is from 750 mv-850 mv;
- adding a halogen donor source in an amount and at a rate sufficient to realize a monitored ORP within said range, wherein said halogen donor source is selected from the group consisting of calcium hypochlorite, sodium hypochlorite, lithium hypochlorite, and mixtures thereof;
- regulating the rate of addition of said halogen donor source to maintain the ORP within said effective range;
- reabsorbing said volatile halogen compounds within said body of water;
- and
- oxidizing the reabsorbed compounds.
A process for removing dissolved halogenated compounds including chloramines and/or bromamines from circulating water systems comprising:
- disposing an oxidation-reduction potential (ORP) sensor in fluid communication with said closed circulating water system;
- continuously monitoring the ORP of said system;
- comparing the monitored ORP to a set-point value calculated to be within an effective range to permit oxidation of said halogenated compounds, wherein the effective range of ORP is from 750 mv-850 mv;
- adding a halogen donor source in an amount and at a rate sufficient to realize a monitored ORP within said effective range, wherein said halogen donor source is selected from the group consisting of calcium hypochlorite, sodium hypochlorite, lithium hypochlorite, and mixtures thereof;
- and
- regulating the rate of addition of said halogen donor source to maintain the ORP within said effective range;
- wherein said halogenated compounds are continually oxidized.
Dependencies are inferred from the claim text.