Process and a plant for purifying of a liquid
AssigneeABB AB
InventorsBrith Claesson, Tor Moxnes
Life of this patent
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Abstract
Process for purification of a liquid, said liquid being contaminated by gas, other liquids and/or solid materials, thereby a) degassing the contaminated liquid in a degassing device where at least a part of the gas and possible solid materials are removed from the liquid, b) mixing the liquid in a mixing and coagulation device by way of utilizing the energy in the liquid flowing into the mixing and coagulation device, thereby to achieve coagulation respectively flocculation of the contaminants in the liquid, and c) the coagulated or flocculated contaminants as well as gas and other liquids thereafter being separated from the liquid to be purified in a flotation and separation device.
Claims12
A process for purification of a contaminated liquid contaminated by at least one of gas, other liquids, and solid materials, comprising the steps of:
- degassing the contaminated liquid in a degassing device whereby at least a part of the gas is removed from the contaminated liquid,
- introducing the contaminated liquid into a mixing and coagulation device, so as to create a main rotational flow pattern of the contaminated liquid flowing through the mixing and coagulation device,
- passing the contaminated liquid through at least one hole in at least one partition wall of the device so as to create a further flow pattern, to achieve mixing and thereby coagulation and flocculation of contaminants respectively in the contaminated liquid by way of said flow patterns, utilizing the energy in the contaminated liquid flowing into the mixing and coagulation device, and
- separating coagulated or flocculated contaminants as well as remaining gas and other liquids from the contaminated liquid to be purified in a flotation and separation device.
A plant for purification of a contaminated liquid contaminated by at least one of gas, other liquids, and solid materials, comprising:
- a degassing tank for degassing at least a part of the gas from the contaminated liquid,
- a mixing and coagulation device that comprises an inlet, for introducing the contaminated liquid flow, adapted to create a main rotational flow pattern of the contaminated liquid flowing through said device, an outlet, and at least one partition wall having at least one hole through which the contaminated liquid is passed so as to create a further flow pattern, to achieve mixing and thereby coagulation and flocculation of contaminants respectively in the contaminated liquid by means of said flow patterns, utilizing the energy in the contaminated liquid flowing into said device, and
- a flotation and separation device for separating coagulated or flocculated contaminants as well as remaining gas and other liquids from the contaminated liquid to be purified.
Dependencies are inferred from the claim text.